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WO2025015546A1 - Rétroaction multi-dispositif à l'aide d'un paquet unique - Google Patents

Rétroaction multi-dispositif à l'aide d'un paquet unique Download PDF

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Publication number
WO2025015546A1
WO2025015546A1 PCT/CN2023/108063 CN2023108063W WO2025015546A1 WO 2025015546 A1 WO2025015546 A1 WO 2025015546A1 CN 2023108063 W CN2023108063 W CN 2023108063W WO 2025015546 A1 WO2025015546 A1 WO 2025015546A1
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WO
WIPO (PCT)
Prior art keywords
packet
resources
decoding result
tag
feedback
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2023/108063
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English (en)
Inventor
Zhikun WU
Yuchul Kim
Ahmed Elshafie
Huilin Xu
Yu Zhang
Kianoush Hosseini
Peter Gaal
Le LIU
Krishna Kiran Mukkavilli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
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Publication date
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Priority to PCT/CN2023/108063 priority Critical patent/WO2025015546A1/fr
Publication of WO2025015546A1 publication Critical patent/WO2025015546A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements

Definitions

  • the following relates to wireless communication, including multi-device feedback using a single packet.
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may be referred to as New Radio (NR) systems.
  • a wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE) .
  • UE user equipment
  • a wireless communications system may include a group of one or more low-capability devices known as tags.
  • a tag may communicate with a device that includes a reader and a radio frequency (RF) source.
  • the tag may transmit a packet to the reader and in some example, the RF source may transmit feedback associated with the packet to the tag.
  • RF radio frequency
  • the method may include a first device (or an radio frequency (RF) source) transmitting a first signal to multiple devices and receiving, in response to the first signal, a second signal from a second device (or a reader) indicating a decoding result of a first packet associated with a third device of the multiple devices (or a first tag) and a decoding result of a second packet associated with a fourth device of the multiple devices (or a second tag) . Further, the method may include the first device transmitting a third packet to the multiple devices that includes an indication of both the first decoding result and the second decoding result.
  • the methods as described herein may allow multiple tags to receive feedback regarding packets associated with the tags via a single packet which may increase system throughput and reduce latency.
  • FIG. 1 shows an example of a wireless communications system that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 2 shows an example of a wireless communications system that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIGs. 3A and 3B show examples of a stage that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 4 shows an example of a feedback scheme that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 5 shows an example of a feedback scheme that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 6 shows an example of a mapping scheme that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 7 shows an example of a feedback scheme that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 8 shows an example of a feedback scheme that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 9 shows an example of a feedback scheme that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 10 shows an example of a feedback scheme that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 11 shows an example of a process flow that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIGs. 12 and 13 show block diagrams of devices that support multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 14 shows a block diagram of a communications manager that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 15 shows a diagram of a system including a UE that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIG. 16 shows a diagram of a system including a network entity that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • FIGs. 17 through 22 show flowcharts illustrating methods that support multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • a wireless communications system may include an radio frequency (RF) source, a reader, and one or more tags (or low capability devices) .
  • the RF source may transmit signaling to the one or more tags and the tags may transmit signaling to the reader which may relay the signaling from the tags to the RF source.
  • communication from the one or more tags to the reader may support frequency domain multiplexing (FDM) and as such, the one or more tags may transmit signaling to the reader using different frequency resources within a same time domain.
  • FDM frequency domain multiplexing
  • communication from the RF source to the one or more tags may not support FDM.
  • the RF source may transmit separate packets over multiple different time domains which may result in a bottleneck or an inefficient use of communication resources.
  • the RF source and/or the reader may multiplex feedback for multiple tags in one packet.
  • a first tag may transmit a first packet to the reader using a first set of resources and a second tag may transmit a second packet to the reader using a second set of resources.
  • the reader may monitor the first set of resources and the second set of resources and determine a decoding result (e.g., acknowledgement (ACK) /negative acknowledgement (NACK) ) for the first packet and the second packet based on the monitoring and transmit an indication of the decoding results to the RF source.
  • ACK acknowledgement
  • NACK negative acknowledgement
  • the RF source may generate a packet that indicates the decoding results and send the packet to the tags.
  • the packet may include a bit map and at least two bits of the bit map may be mapped to the first set of resources or the second set of resources.
  • the first tag and the second tag may receive the packet and determine the decoding result of their respective packets based on a logic value of the bit corresponding to the resources used to transmit the first packet and the second packet, respectively.
  • the first tag and the second tag may each generate a unique sequence (or random number) and transmit the unique sequence to the reader along with their packets. If the reader successfully decodes the unique sequences, the reader may forward the unique sequences to the RF source and the RF source may generate a packet including the unique sequences. The RF source may than transmit the packet to the tags and the tags may determine ACK if the tags detect their respective random numbers and may determine NACK if the tags do not detect their respective unique sequence.
  • aspects of the disclosure are initially described in the context of wireless communications systems. Additional aspects are described in the context of feedback schemes, a stage, a mapping scheme, and a process flow. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to multi-device feedback using a single packet.
  • FIG. 1 shows an example of a wireless communications system 100 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the wireless communications system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-A Pro
  • NR New Radio
  • the network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities.
  • a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature.
  • network entities 105 and UEs 115 may wirelessly communicate via one or more communication links 125 (e.g., a radio frequency (RF) access link) .
  • a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish one or more communication links 125.
  • the coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs) .
  • RATs radio access technologies
  • the UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times.
  • the UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1.
  • the UEs 115 described herein may be capable of supporting communications with various types of devices, such as other UEs 115 or network entities 105, as shown in FIG. 1.
  • a node of the wireless communications system 100 which may be referred to as a network node, or a wireless node, may be a network entity 105 (e.g., any network entity described herein) , a UE 115 (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein.
  • a node may be a UE 115.
  • a node may be a network entity 105.
  • a first node may be configured to communicate with a second node or a third node.
  • the first node may be a UE 115
  • the second node may be a network entity 105
  • the third node may be a UE 115.
  • the first node may be a UE 115
  • the second node may be a network entity 105
  • the third node may be a network entity 105.
  • the first, second, and third nodes may be different relative to these examples.
  • reference to a UE 115, network entity 105, apparatus, device, computing system, or the like may include disclosure of the UE 115, network entity 105, apparatus, device, computing system, or the like being a node.
  • disclosure that a UE 115 is configured to receive information from a network entity 105 also discloses that a first node is configured to receive information from a second node.
  • network entities 105 may communicate with the core network 130, or with one another, or both.
  • network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., in accordance with an S1, N2, N3, or other interface protocol) .
  • network entities 105 may communicate with one another via a backhaul communication link 120 (e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities 105) or indirectly (e.g., via a core network 130) .
  • network entities 105 may communicate with one another via a midhaul communication link 162 (e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link 168 (e.g., in accordance with a fronthaul interface protocol) , or any combination thereof.
  • the backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., an electrical link, an optical fiber link) , one or more wireless links (e.g., a radio link, a wireless optical link) , among other examples or various combinations thereof.
  • a UE 115 may communicate with the core network 130 via a communication link 155.
  • One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a 5G NB, a next-generation eNB (ng-eNB) , a Home NodeB, a Home eNodeB, or other suitable terminology) .
  • a base station 140 e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be
  • a network entity 105 may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140) .
  • a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) , which may be configured to utilize a protocol stack that is physically or logically distributed among two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) .
  • IAB integrated access backhaul
  • O-RAN open RAN
  • vRAN virtualized RAN
  • C-RAN cloud RAN
  • a network entity 105 may include one or more of a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN Intelligent Controller (RIC) 175 (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) 180 system, or any combination thereof.
  • An RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) .
  • One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations) .
  • one or more network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
  • VCU virtual CU
  • VDU virtual DU
  • VRU virtual RU
  • the split of functionality between a CU 160, a DU 165, and an RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170.
  • functions e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combinations thereof
  • a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack.
  • the CU 160 may host upper protocol layer (e.g., layer 3 (L3) , layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) .
  • the CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160.
  • L1 e.g., physical (PHY) layer
  • L2 e.g., radio link control (RLC) layer, medium access control (MAC) layer
  • a functional split of the protocol stack may be employed between a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack.
  • the DU 165 may support one or multiple different cells (e.g., via one or more RUs 170) .
  • a functional split between a CU 160 and a DU 165, or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170) .
  • a CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions.
  • CU-CP CU control plane
  • CU-UP CU user plane
  • a CU 160 may be connected to one or more DUs 165 via a midhaul communication link 162 (e.g., F1, F1-c, F1-u) , and a DU 165 may be connected to one or more RUs 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface) .
  • a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 105 that are in communication via such communication links.
  • infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130) .
  • IAB network one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other.
  • One or more IAB nodes 104 may be referred to as a donor entity or an IAB donor.
  • One or more DUs 165 or one or more RUs 170 may be partially controlled by one or more CUs 160 associated with a donor network entity 105 (e.g., a donor base station 140) .
  • the one or more donor network entities 105 may be in communication with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120) .
  • IAB nodes 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by DUs 165 of a coupled IAB donor.
  • IAB-MT IAB mobile termination
  • An IAB-MT may include an independent set of antennas for relay of communications with UEs 115, or may share the same antennas (e.g., of an RU 170) of an IAB node 104 used for access via the DU 165 of the IAB node 104 (e.g., referred to as virtual IAB-MT (vIAB-MT) ) .
  • the IAB nodes 104 may include DUs 165 that support communication links with additional entities (e.g., IAB nodes 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream) .
  • one or more components of the disaggregated RAN architecture e.g., one or more IAB nodes 104 or components of IAB nodes 104) may be configured to operate according to the techniques described herein.
  • one or more components of the disaggregated RAN architecture may be configured to support multi-device feedback using a single packet as described herein.
  • some operations described as being performed by a UE 115 or a network entity 105 may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., IAB nodes 104, DUs 165, CUs 160, RUs 170, RIC 175, SMO 180) .
  • a UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples.
  • a UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC machine type communications
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • devices such as other UEs 115 that may sometimes act as relays as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • the UEs 115 and the network entities 105 may wirelessly communicate with one another via one or more communication links 125 (e.g., an access link) using resources associated with one or more carriers.
  • the term “carrier” may refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication links 125.
  • a carrier used for a communication link 125 may include a portion of an RF spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) .
  • BWP bandwidth part
  • Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling.
  • the wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.
  • Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105.
  • the terms “transmitting, ” “receiving, ” or “communicating, ” when referring to a network entity 105 may refer to any portion of a network entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105) .
  • a network entity 105 e.g., a base station 140, a CU 160, a DU 165, a RU 170
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • a carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute RF channel number (EARFCN) ) and may be identified according to a channel raster for discovery by the UEs 115.
  • E-UTRA evolved universal mobile telecommunication system terrestrial radio access
  • a carrier may be operated in a standalone mode, in which case initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode, in which case a connection is anchored using a different carrier (e.g., of the same or a different radio access technology) .
  • the communication links 125 shown in the wireless communications system 100 may include downlink transmissions (e.g., forward link transmissions) from a network entity 105 to a UE 115, uplink transmissions (e.g., return link transmissions) from a UE 115 to a network entity 105, or both, among other configurations of transmissions.
  • Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
  • a carrier may be associated with a particular bandwidth of the RF spectrum and, in some examples, the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a set of bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) .
  • Devices of the wireless communications system 100 e.g., the network entities 105, the UEs 115, or both
  • the wireless communications system 100 may include network entities 105 or UEs 115 that support concurrent communications using carriers associated with multiple carrier bandwidths.
  • each served UE 115 may be configured for operating using portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
  • Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete Fourier transform spread OFDM
  • a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related.
  • the quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) , such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication.
  • a wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam) , and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.
  • One or more numerologies for a carrier may be supported, and a numerology may include a subcarrier spacing ( ⁇ f) and a cyclic prefix.
  • a carrier may be divided into one or more BWPs having the same or different numerologies.
  • a UE 115 may be configured with multiple BWPs.
  • a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
  • Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) .
  • Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
  • SFN system frame number
  • Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration.
  • a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots.
  • each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing.
  • Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) .
  • a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N f ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
  • a subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) .
  • TTI duration e.g., a quantity of symbol periods in a TTI
  • the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
  • Physical channels may be multiplexed for communication using a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • a control region e.g., a control resource set (CORESET)
  • CORESET control resource set
  • One or more control regions may be configured for a set of the UEs 115.
  • one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner.
  • An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size.
  • Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
  • a network entity 105 may be movable and therefore provide communication coverage for a moving coverage area 110.
  • different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105.
  • the overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105.
  • the wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.
  • Some UEs 115 may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) .
  • M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a network entity 105 (e.g., a base station 140) without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that uses the information or presents the information to humans interacting with the application program.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
  • the wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof.
  • the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) .
  • the UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions.
  • Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data.
  • Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications.
  • the terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.
  • a UE 115 may be configured to support communicating directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., in accordance with a peer-to-peer (P2P) , D2D, or sidelink protocol) .
  • D2D device-to-device
  • P2P peer-to-peer
  • one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170) , which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105.
  • one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105.
  • groups of the UEs 115 communicating via D2D communications may support a one-to-many (1: M) system in which each UE 115 transmits to each of the other UEs 115 in the group.
  • a network entity 105 may facilitate the scheduling of resources for D2D communications.
  • D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.
  • a D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115) .
  • vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these.
  • V2X vehicle-to-everything
  • V2V vehicle-to-vehicle
  • a vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system.
  • vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., network entities 105, base stations 140, RUs 170) using vehicle-to-network (V2N) communications, or with both.
  • roadside infrastructure such as roadside units
  • network nodes e.g., network entities 105, base stations 140, RUs 170
  • V2N vehicle-to-network
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) .
  • EPC evolved packet core
  • 5GC 5G core
  • MME mobility management entity
  • AMF access and mobility management function
  • S-GW serving gateway
  • PDN Packet Data Network gateway
  • UPF user plane function
  • the control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130.
  • NAS non-access stratum
  • User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions.
  • the user plane entity may be connected to IP services 150 for one or more network operators.
  • the IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
  • IMS IP Multimedia Subsystem
  • the wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) .
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • the wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands.
  • the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance.
  • operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA) .
  • Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
  • a network entity 105 e.g., a base station 140, an RU 170
  • a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • the antennas of a network entity 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations.
  • a network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support RF beamforming for a signal transmitted via an antenna port.
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • the wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack.
  • communications at the bearer or PDCP layer may be IP-based.
  • An RLC layer may perform packet segmentation and reassembly to communicate via logical channels.
  • a MAC layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer also may implement error detection techniques, error correction techniques, or both to support retransmissions to improve link efficiency.
  • an RRC layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a network entity 105 or a core network 130 supporting radio bearers for user plane data.
  • a PHY layer may map transport channels to physical channels.
  • the UEs 115 and the network entities 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly via a communication link (e.g., a communication link 125, a D2D communication link 135) .
  • HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions) .
  • a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific slot for data received via a previous symbol in the slot. In some other examples, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • a device may multiplex multiple feedback responses to a group of tags (e.g., low-capability devices) in a single packet.
  • the method may include a first device (e.g., an RF source or a UE 115) transmitting a first signal to multiple devices (or tags) and receiving, in response to the first signal, a second signal from a second device (e.g., a reader or a network entity 105) indicating a decoding result of a first packet associated with a third device of the multiple devices (or a first tag) and a decoding result of a second packet associated with a fourth device of the multiple devices (or a second tag) .
  • a first device e.g., an RF source or a UE 115
  • a second device e.g., a reader or a network entity 105
  • the method may include the first device transmitting a third packet to the multiple devices that includes an indication of both the first decoding result and the second decoding result.
  • the methods as described herein may allow multiple tags to receive feedback regarding packets associated with the tags via a single packet which may increase system throughput and reduce latency.
  • FIG. 2 shows an example of a wireless communications system 200 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the wireless communications system 200 may implement aspects of a wireless communications system 100.
  • the wireless communications system 200 may include an RF source 205 which may be an example of a UE 115 or a network entity 105 as described with reference to FIG. 1.
  • the wireless communications system 200 may include a reader 215 which may be an example of a UE 115 or a network entity 105 as described with reference to FIG. 1.
  • the wireless communications system 200 may include one or more tags 210 (e.g., a tag 210-a, a tag 210-b and a tag 210-c) .
  • tags 210 may be described as low-capability devices that may support applications such as file tracking, access control, smart-labeling, location tracking, etc.
  • a tag 210 may typically include an antenna and an integrated circuit. In order to communicate, the tag 210 may wait for a signal (or a continuous wave) from the RF source 205.
  • the RF source 205 may send the signal to the tag 210 and an antenna of the tag 210 may draw in energy from the signal (unmodulated wave or RF wave) and use the energy to power an integrated circuit of the tag 210 which may generate a signal (or modulated wave) to the reader 215.
  • the signal generated by the tag 210 may be known as backscatter.
  • the tag 210 may modulate the signal according to an amplitude shift keying (ASK) modulation scheme or a frequency shift keying (FSK) modulation scheme.
  • the tags 210 may include an energy storage unit which may allow the tags 210 to store the energy from the RF wave.
  • the reader 215 may control what is being communicated to the one or more tags 210 and the RF source 205 may be responsible for powering up the one or more tags 210 and relaying any information from the reader 215 to the one or more tags 210.
  • the reader 215 and the RF source 205 may be included in a same device (e.g., a monostatic system)
  • the reader 215 and the RF source 205 may be separate devices (e.g., bistatic system) .
  • the reader 215 may generate a forward link (FL) packet 225 and send the FL packet 225 to the RF source 205.
  • FL forward link
  • the RF source 205 may transmit the FL packet 225 (or a modulated wave) to the tag 210-a, the tag 210-b, and the tag 210-c (e.g., using an ASK modulation scheme) .
  • the link between the RF source 205 and the one or more tags 210 may be known as a FL.
  • the tag 210-a, the tag 210-b, and the tag 210-c may generate a response to the FL packet 225 (e.g., a BL packet 230-a, a BL packet 230-b, and a BL packet 230-c, respectively) and transmit the BL packets 230 to the reader 215.
  • the link between the tags 210 and the reader 215 may be known as a backscatter link (BL) .
  • the tags 210 may support frequency domain multiplexing (FDM) and occupy different sub-channels 220 (a set of frequency resources) .
  • FDM frequency domain multiplexing
  • the tag 210-a may occupy the sub-channel 220-a
  • the tag 210-b may occupy the sub-channel 220-b
  • the tag 210-c may occupy the sub-channel 220-c.
  • the each tag 210 may transmit their respective BL packets 230 to the reader 215 using their respective sub-channel 220.
  • the tag 210-a may transmit the BL packet 230-a using the sub-channel 220-a
  • the tag 210-b may transmit the BL packet 230-b using the sub-channel 220-b
  • the tag 210-c may transmit the BL packet 230-c using the sub-channel 220-c.
  • the reader 215 may monitor the sub-channels 220 for the BL packets 230 and generate feedback for each of the tags 210.
  • the reader 215 may successfully receive the BL packet 230-a and the BL packet 230-c and fail to receive the BL packet 230-b.
  • the feedback may include ACK feedback for the tag 210-a and the tag 210-c and NACK for the tag 210-b.
  • the reader 215 may send a signal to the RF source 205 indicating the feedback. Further, the RF source 205 may relay the feedback to the tag 210-a, the tag 210-b, and the tag 210-c.
  • the RF source 205 may not support FDM (e.g., due to wideband reception) .
  • FDM e.g., due to wideband reception
  • the RF source 205 may transmit multiple FL packets 225 using multiple FL slots (e.g., TDM individual packets) .
  • the RF source 205 may transmit a first FL packet 225 including the feedback associated with the BL packet 230-a to the tag 210-a during a first time slot, a second FL packet 225 including the feedback associated with the BL packet 230-b to the tag 210-b during a second time slot that occurs after the first time slot, and a third FL packet 225 including the feedback associated with the BL packet 230-c to the tag 210-c during a third time slot that occurs after the second time slot. Transmitting FL packets 225 over multiple time slot may increase the latency of the system and limit the overall throughput of the system.
  • the RF source 205 may multiplex feedback for multiple tags 210 in a single FL packet 225.
  • the reader 215 may generate a first FL packet 225 and send the first FL packet 225 to the RF source 205.
  • the RF source 205 may transmit the first FL packet 225 to the tags 210.
  • the first FL packet 225 or another signal transmitted to the tags 210 may indicate sets of resources (e.g., inventory occasions or time/frequency resources) .
  • a set of resources may include frequency resource that make up at least a portion of a sub-channel 220 and time resources.
  • the sets of resources may include a first set of resources, a second set of resources, a third set of resources, and a fourth set of frequency resources.
  • Each tag 210 may select or be assigned to a set of resources included in the sets of resources.
  • the tag 210-a may correspond to the first set of resources (or sub-channel 220-a)
  • the tag 210-b may correspond to the second set of resources (or sub-channel 220-b)
  • the tag 210-c may correspond the third set of resources (or sub-channel 220-c) .
  • the fourth set of resources may be unoccupied by a tag 210.
  • the tag 210-a, the tag 210-b, and the tag 210-c may generate a BL packet 230-a, a BL packet 230-b, and a BL packet 230-c, respectively. Further, the tags 210 may transmit their respective BL packets 230 to the reader 215 using their respective set of resources to the reader 215.
  • the tag 210-a may transmit the BL packet 230-a using the first set of resources that spans at least a portion of the sub-channel 220-a
  • the tag 210-b may transmit the BL packet 230-b using the second set of resources that spans at least a portion of the sub-channel 220-b
  • the tag 210-c may transmit the BL packet 230-c using the third set of resources that spans at least a portion of the sub-channel 220-c.
  • the reader 215 may monitor the sets of resources for the BL packets 230 and generate feedback 235 based on the monitoring. In one example, the reader may fail to receive the BL packet 230-b and successfully receive the BL packet 230-a and the BL packet 230-c.
  • the feedback 235 may include ACK for the BL packet 230-a and the BL packet 230-c and NACK for the BL packet 230-b. Further, the feedback 235 may include NACK for any BL packets 230 transmitted via the fourth set of resources due to the fourth set of resources being unoccupied by a tag 210.
  • the reader 215 may then send a signal to the RF source 205 indicating the feedback.
  • the RF source 205 may transmit a second FL packet 225 to the tags 210 indicating the feedback.
  • the second FL packet 225 may include a bitmap that indicates the feedback 235.
  • each bit in the bitmap may correspond to a set of resources included in the sets of resources.
  • a first bit in the bitmap map correspond to the first set of resources
  • a second bit in the bitmap map correspond to the second set of resources
  • a third bit in the bitmap may correspond to the third set of resources
  • a fourth bit in the bitmap map correspond to the fourth set of resources.
  • a logic value of a bit in the bitmap may indicate the feedback for a BL packet 230 communicated using the set of resources corresponding to the bit.
  • a logic value of 1 may indicate ACK feedback and a logic value of 0 may indicate NACK feedback.
  • the bitmap may include 1, 0, 1, 0.
  • the tags 210 may identify a bit in the bitmap that corresponds to their respective set of resources and determine whether their respective BL packet 230 was successfully or unsuccessfully received at the reader 215 based on a logic value of the bit.
  • the tags 210 may each generate a unique sequence (or random number) .
  • the tag 210-a may generate a first unique sequence
  • the tag 210-b may generate a second unique sequence
  • the tag 210-c may generate a third unique sequence.
  • the tags 210 may transmit the unique sequence to the reader 215.
  • the unique sequences may be included in the BL packets 230.
  • the feedback 235 generated by the reader 215 may include a unique sequence for each BL packet 230 successfully received by the reader 215.
  • the feedback 235 may include the first unique sequence associated with the tag 210-a and the third unique sequence associated with the tag 210-c.
  • the reader 215 may then send a signal to the RF source 205 indicating the feedback 235.
  • the RF source 205 may transmit a second FL packet 225 to the tags 210 indicating the feedback 235.
  • the feedback 235 may include the first unique sequence and the third unique sequence.
  • the tags 210 may receive the second FL packet 225 and if a tag 210 identifies their respective unique sequence in the second FL packet 225, the tag 210 may determine that their respective BL packet 230 was received successfully by the reader 215. Alternatively, if a tag 210 does not identify their respective unique sequence in the second FL packet 225, the tag 210 may determine that their respective BL packet 230 was received unsuccessfully by the reader 215. That is, a presence of a unique sequence in the second FL packet 225 is indicative of ACK and an absence of a unique sequence in the second FL packet 225 is indicative of NACK.
  • Multiplexing feedback for multiple tags 210 in one FL packet 225 may allow for more efficient use of communication resources on the FL when compared to transmitting feedback for multiple tags 210 using multiple packets over multiple different time resources. Further, it should be noted that the methods as described herein may apply to both a bistatic and monostatic system.
  • FIGs. 3A and 3B show examples of a stage 300 (e.g., a stage 300-a and a stage 300-b) that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the stages 300 may implement aspects of a wireless communications system 100 and a wireless communications system 200.
  • the stages 300 may be implemented by an RF sources 205, tags 210, or a reader 215 as described with reference to FIG. 2.
  • a wireless communications system may include an RF source, a reader, and tags.
  • the RF source, the reader, and the tags may undergo three stages. These three stages include a sync stage, an inventory stage, and a communication stage.
  • FIG. 3A illustrates how the methods as described herein may apply to the inventory stage
  • FIG. 3B illustrates how the methods as described herein may apply to the communication stage.
  • the RF source may transmit an inventory trigger 305 to the tags to initiate the inventory stage.
  • the tags may be pre-configured with a set of inventory opportunities 335.
  • the tags may be pre-configured with an inventory opportunity 335-a, an inventory opportunity 335-b, an inventory opportunity 335-c, and an inventory opportunity 335-d.
  • Each inventory opportunity may represent a different set of time and frequency resources of a slot 330-b (or a BL slot) .
  • one or more of the tags may transmit Msg1 to the reader using one of the inventory opportunities 335.
  • Msg1 may include a preamble associated with the tags.
  • a first tag may transmit Msg1 to the reader using the inventory opportunity 335-c and a second tag may transmit Msg1 to the reader using the inventory opportunity 335-d.
  • more than one tag may occupy a same inventory opportunity 335.
  • the reader may monitor the inventory opportunities 335 during slot 330-b for Msg1 and generate feedback indicating whether Msg1 was successfully received from the tags.
  • the reader may successfully receive Msg1 from the first tag over the inventory opportunity 335-c and successfully receive Msg1 from the second tag over the inventory opportunity 335-d.
  • the reader may fail to receive any Msg1s over the inventory opportunity 335-a and the inventory opportunity 335-b due to the inventory opportunity 335-a and the inventory opportunity 335-b being unoccupied by tags, collisions occurring between tags, or a decoding failure at the reader.
  • the feedback may include at least an indication of ACK for Msg1 associated with the first tag and ACK for Msg1 associated with the second tag.
  • the reader may forward the feedback to the RF source.
  • the RF source may generate Msg2 and transmit Msg2 to the tags (e.g., the first tag and the second tag) during the slot 330-c.
  • Msg 2 may be an example of a packet that includes a preamble (e.g., the preamble associated with the tags) , control information, the feedback for the multiple tags, and a CRC.
  • the feedback in Msg2 may include a bitmap that indicates to the tags whether their respective Msg1s were decoded successfully by the reader.
  • the feedback field may include one or more unique sequences to indicate whether the tag’s respective Msg1s were decoded successfully by the reader.
  • the tags may determine whether their respective Msg1s were decoded successfully by the reader. For example, the first tag and the second tag may determine that their Msg1 was successfully decoded using Msg2.
  • the tag may transmit Msg3 to the reader using time/frequency resources 340 (e.g., time/frequency resources 340-a or time/frequency resources 340-b) of a slot 330-d.
  • Msg3 may include a 96-bit electronic product code (EPC) .
  • EPC electronic product code
  • the first tag may transmit Msg3 using the time/frequency resources 340-a and the second tag may transmit Msg3 to the reader using the time/frequency resources 340-b.
  • the reader may transmit Msg4 to the RF source that includes an EPC generated L1-ID and the RF source may forward Msg4 to the tags during slot 330-e.
  • Msg4 may include feedback indicating whether Msg3 was successfully received at the reader using the bitmap method or the unique sequence method.
  • the inventory stage may be considered complete for the first tag and the second tag.
  • the RF source, the reader, and the tags may proceed to the communication stage.
  • the communication stage may begin with the RF source transmitting a FL read command 345 to the first tag and the second tag during a slot 330-f.
  • the first tag and the second tag may transmit data to the reader during the slot 330-g using time/frequency resources 340 indicated in the FL read command 345.
  • the first tag may transmit data 350-a to the reader using time/frequency resources 340-c and the second tag may transmit data 350-b to the reader using the time/frequency resources 340-d.
  • the reader may monitor the time/frequency resources 340-c for the data 350-a and the time/frequency resources 340-d for the data 350-b and generate feedback indicating whether the data 350-a and the data 350-b was successfully received from the tags.
  • the reader may successfully receive the data 350-a from the first tag and successfully receive data 350-b from the second tag.
  • the feedback may include an indication of ACK for data 350-a associated with the first tag and ACK for data 350-b associated with the second tag.
  • the reader may forward the feedback to the RF source.
  • the RF source may generate a response 355 and transmit the response 355 during the slot 330-h to the tags (e.g., the first tag and the second tag) .
  • the response 355 may be an example of a packet that includes a preamble, control information, the feedback for the multiple tags, and a CRC.
  • the feedback in the response 355 may include a bitmap that indicates to the tags whether their respective data 350 was decoded successfully by the reader.
  • the feedback field may include one or more unique sequences to indicate whether the tag’s respective data 350 was decoded successfully by the reader.
  • the tags may determine whether their respective data 350 were decoded successfully by the reader. For example, the first tag and the second tag may determine that the data 350-a and the data 350-b was successfully decoded using the response 355.
  • FIG. 4 shows an example of a feedback scheme 400 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the feedback scheme 400 may implement aspects of a wireless communications system 100 and a wireless communications system 200.
  • the feedback scheme 400 may be implemented by an RF sources 205, tags 210, or a reader 215 as described with reference to FIG. 2.
  • an RF source, a reader, and a group of tags may perform inventory.
  • the RF source may transmit an inventory trigger 405 during the slot 430-a to the group of tags.
  • one or more of the tags included in the group of tags may transmit Msg1 over pre-configured inventory opportunities 435 of slot 430-b.
  • the pre-configured inventory opportunities 435 may include an inventory opportunity 435-a, an inventory opportunity 435-b, an inventory opportunity 435-c, and an inventory opportunity 435-d.
  • a first tag may transmit Msg1 to the reader using the inventory opportunity 435-b
  • a second tag may transmit Msg1 to the reader using the inventory opportunity 435-c
  • a third tag may transmit Msg1 to the reader using the inventory opportunity 435-d.
  • the inventory opportunity 435-a may be unoccupied (or empty) and no tag may transmit Msg1 during the inventory opportunity 435-a.
  • the reader may monitor the inventory opportunities 435 for Msg1 and generate feedback based on the monitoring.
  • the reader may successfully receive and decode Msg1 from the second tag and the third tag and may not successfully receive and decode Msg1 from the first tag.
  • the feedback may include ACK for Msg1 associated with the second tag, NACK for Msg1 associated with the first tag, and ACK for Msg1 associated with the third tag.
  • the reader may forward the feedback to the RF source.
  • the RF reader may generate a response 415 (or Msg2) to send to the group of tags.
  • the response 415 may be an example of a packet that includes a preamble (e.g., a preamble included in Msg1) , control information, the feedback for the multiple tags (e.g., the first tag, the second tag, and the third tag) , and a CRC.
  • the response 415-a, the response 415-b, the response 415-c, the response 415-d, and the response 415-e may illustrate different methods of including the feedback for multiple tags in the response 415.
  • the feedback may include a bitmap.
  • a number of bits included in the bitmap may be equal to the number of pre-configured inventory opportunities 435.
  • the number of bits in the bitmap may be equal to four.
  • each bit in the bitmap may map to a different pre-configured inventory opportunity 435 (e.g., one-to-one mapping between inventory opportunities 435 and bits) .
  • a first bit in the bitmap may map to the inventory opportunity 435-a
  • a second bit in the bitmap may map to the inventory opportunity 435-b
  • a third bit in the bitmap may map to the inventory opportunity 435-c
  • a fourth bit in the bitmap may map to the inventory opportunity 435-d.
  • the mapping between the bits in the bitmap and the inventory opportunities 435 may be signaled to the tags or may pre-configured at the tags.
  • a logic value of a bit in the bitmap may indicate a decoding result of Msg1 at the reader for an inventory opportunity 435 corresponding to the bit.
  • the RF source may set the first bit to a logic value of 0 to indicate NACK for a Msg1 received by the reader over inventory opportunity 435-a, set the second bit to a logic value of 0 to indicate NACK for a Msg1 received by the reader over inventory opportunity 435-b, set the third bit to a logic value of 1 to indicate ACK for a Msg1 received by the reader over inventory opportunity 435-c, and the fourth bit to a logic value of 1 to indicate ACK for a Msg1 received by the reader over inventory opportunity 435-d.
  • each tag in the group of tags may identify a bit in the bitmap (e.g., a bit corresponding to the inventory opportunity 435 that the tag used to transmit Msg1) and determine whether their respective Msg1 was received by the reader based on the logic value of the bit.
  • the second tag may identify the third bit in the bit map (e.g., based on the mapping between the bits and the inventory opportunities 435) and determine that its Msg1 was successfully received by the reader based on the logic value of the bit being 1.
  • more than one bit of the bitmap may map to an inventory opportunity 435 to increase reliability via CDM.
  • 2 or more bits of the bitmap may map to an inventory opportunity 435.
  • ACK or NACK may be conveyed to a tag using different bit combinations. For example, if 4 bits map to an inventory opportunity 435, 1, 1, 1, 1 or 1, 0, 1, 0 may convey ACK and 0, 0, 0, 0 or 0, 1, 0, 1 may convey NACK for a packet transmitted via the inventory opportunity 435.
  • the feedback may include one or more random numbers 445.
  • each tag e.g., the first tag, the second tag, and the third tag
  • the random number 445 may not truly be random. Instead, the random number 445 may be an example of a unique sequence that is generated by a tag from an ID associated with the tag by truncating or hashing.
  • the first tag may generate a random number 445 (not shown)
  • the second tag may generate a random number 445-a
  • the third tag may generate a random number 445-b.
  • Each tag may include their random number 445 in Msg1 sent to the reader.
  • the reader may forward the random number 445 included in Msg 1 to the RF source. Because the reader successfully decodes and receives Msg1 from the second tag and the third tag, the reader may forward the random number 445-a and the random number 445-b to the RF source. However, because the reader did not successfully decode and receive Msg1 from the first tag, the reader may not forward the first tag’s random number 445.
  • the RF source may enumerate the random number 445-a and the random number 445-b and include the random number 445-a and the random number 445-b in the response 415-b.
  • the tags may probe the response 415-b for their random number 445. If a tag identifies its random number 445, the tag may determine that their respective Msg1 was decoded successfully by the reader. For example, the second tag may identify random number 445-a in the response 415-b and determine its Msg1 was successfully decoded by the reader. Alternatively, the first tag may not identify its random number 445 in the response 415-b and determine its Msg1 was not decoded by the reader successfully based on an absence of its random number 445 in the response 415-b.
  • Response 415-c may be similar to response 415-b, however in response 415-c, an order of the random numbers 445 and the number of candidate random numbers 445 included in the response 415-c may be based on the pre-configured inventory opportunities 435.
  • the number of candidate random numbers 445 included in the response 415-c may be equal to four (e.g., one for each of the pre-configured inventory opportunities 435) .
  • the response 415-c may include a sequence of four random numbers 445. Further, the position of the random numbers 445 in the sequence may be mapped to a different inventory opportunity 435.
  • a first position in the sequence may map to the inventory opportunity 435-a
  • a second position in the sequence may map to the inventory opportunity 435-b
  • a third position in the sequence may map to the inventory opportunity 435-c
  • a fourth position in the sequence may map to the inventory opportunity 435-d.
  • the RF source may leave the position in the sequence corresponding to the inventory opportunity 435 empty.
  • the reader may not successfully decode the Msg1 from the first tag over the inventory opportunity 435-b and as such, the reader may not provide a random number 445 associated with the first tag.
  • the RF source may leave the second position in the sequence empty.
  • the first position of the sequence e.g., due to the inventory opportunity 435-a being empty.
  • the reader may forward the random number 445-a and the random number 445-b to the RF source and the RF source may insert the random number 445-a in the third position of the response 415-c and the random number 445-b in the fourth position of the response 415-c.
  • Response 415-d combines aspects of the response 415-a and the response 415-c.
  • the response 415-d may include the bitmap as described in the response 415-a and the random numbers 445 as discussed in the response 415-c.
  • Response 415-e may be similar to response 415-b.
  • the response 415-b may include the random numbers 445 for tags whose Msg1 was received and decoded successfully by the reader.
  • the RF source may enumerate the random numbers 445 with their corresponding inventory opportunity 435.
  • the random number 445-a may be enumerated with inventory opportunity 435-c and the random number 445-b may be enumerated with inventory opportunity 435-d.
  • tags whose Msg1 was successfully received by the reader may transmit Msg 3 to the reader using time/frequency resources 440 during the slot 430-d.
  • the second tag may transmit Msg3 using the time/frequency resources 440-a and the third tag may transmit Msg3 using the time/frequency resources 440-b.
  • the reader may transmit Msg4 to the RF source and the RF source may transmit Msg4 to the tags during the slot 430-e.
  • Msg4 may include feedback associated with Msg3 for the tags (e.g., the second tag and the third tag) and the feedback may have a similar format to the feedback included in one of response 415-a, response 415-b, response 415-c, response 415-d, or response 415-e.
  • similar methods may be applied to the communication stage as described in FIG. 3B.
  • the response 355 of FIG. 3B may include feedback with a similar format to the feedback included in one of the response 415-a, the response 415-b, the response 415-c, the response 415-d, or the response 415-e.
  • the information included in the response 415 may depend on a priority of the tags, an energy state of the tags or whether the tags include an energy storage unit.
  • the reader or the RF source may determine a priority (e.g., high or low) of each of the tags and an energy state (e.g., high or low) of each of the tags.
  • a high energy state may refer to a tag whose energy storage is above a threshold and a low energy state may refer to a tag whose energy storage is below the threshold or a different threshold.
  • the response 415 may not include a CRC, may not include the multiple device feedback (but may include single device feedback as described in FIG. 2) , or may not include feedback of any kind.
  • the tags e.g., the first tag, the second tag, or the third tag
  • the response 415 may include a CRC or may include the multiple device feedback.
  • FIG. 5 shows an example of a feedback scheme 500 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the feedback scheme 500 may implement aspects of a wireless communications system 100 and a wireless communications system 200.
  • the feedback scheme 500 may be implemented by an RF sources 205, tags 210, or a reader 215 as described with reference to FIG. 2.
  • an RF source, a reader, and a group of tags may perform inventory.
  • the RF source may transmit an inventory trigger 505 during the slot 530-a to a group of tags.
  • one or more of the tags included in the group of tags may transmit Msg1 over pre-configured inventory opportunities 535 of a slot 530-b.
  • the pre-configured inventory opportunities 535 may include an inventory opportunity 535-a, an inventory opportunity 535-b, an inventory opportunity 535-c, and an inventory opportunity 535-d.
  • a first tag may transmit Msg1 to the reader using the inventory opportunity 535-b
  • a second tag may transmit Msg1 to the reader using the inventory opportunity 535-c
  • a third tag may transmit Msg1 to the reader using the inventory opportunity 535-d.
  • the reader may monitor the inventory opportunities 535 for Msg1 and generate feedback based on the monitoring.
  • the reader may successfully receive and decode Msg1 from the second tag and the third tag and may not successfully receive and decode Msg1 from the first tag.
  • the feedback may include NACK for Msg1 associated with the first tag, ACK for Msg1 associated with the second tag, and ACK for Msg1 associated with the third tag.
  • the reader may forward the feedback to the RF source.
  • the RF reader may generate a response 515 (or Msg2) to send to the group of tags at a slot 530-c.
  • the response 515 may be an example of a packet that includes a preamble, control information, resource allocation information, the feedback to multiple tags, and a CRC.
  • Each tag whose Msg1 was successfully received and decoded by the reader may transmit Msg3 to the reader during a slot 530-d using time/frequency resources 540.
  • the resource allocation information included in the response 515 may indicate time/frequency resources 540 for which the tags may utilize to transmit Msg3 or the retransmission of Msg1 not received by the reader successfully during the slot 530-b.
  • the tags may receive control signaling configuring the tags with a set of time/frequency resources 540 that includes at least time/frequency resources 540-a and time/frequency resources 540-b.
  • the time/frequency resources 540 may be arranged in a table and each time/frequency resource 540 of the table may have a corresponding table index (e.g., row and column of the table) .
  • the resource allocation information may indicate time/frequency resources 540 for each tag whose Msg1 was successfully received by the reader.
  • the resources allocation information may indicate time/frequency resources 540 for each of the second tag and the third tag.
  • the resource allocation information may include a list of two table indices (e.g., time/frequency resources 540-a followed by the time/frequency resources 540-b) .
  • the tags may identify which time/frequency resource 540 apply to them based on the feedback indicated in the response 515. For example, if the feedback includes a bitmap as described in FIG. 4, a tag may determine the time/frequency resources 540 based on the order in the bitmap.
  • the third tag may identify a fourth and last bit in the bitmap and determine based on a logic value of the fourth bit that its Msg1 was decoded successfully. After this, the third tag may identify the last table index in the list of table indices (e.g., a table index corresponding to time/frequency resources 540-b) and transmit Msg3 using the time/frequency resources 540-b corresponding to the table index.
  • the last table index in the list of table indices (e.g., a table index corresponding to time/frequency resources 540-b) and transmit Msg3 using the time/frequency resources 540-b corresponding to the table index.
  • a tag may determine the time/frequency resources 540 based on an order of the random numbers in the sequence.
  • the third tag may identify that a second and last random number in the sequence matches its previously generated random number and determine based on the presence of the random number in the sequence that its Msg1 was decoded successfully. After this, the third tag may identify the last table index in the list of table indices (e.g., a table index corresponding to time/frequency resources 540-b) in the response 515 and transmit Msg3 using the time/frequency resources 540-b corresponding to the table index.
  • the reader may transmit Msg4 to the RF source and the RF source may transmit Msg4 to the tags during the slot 530-e.
  • Msg4 may include feedback associated with Msg3 for the tags (e.g., the second tag and the third tag) . Using such methods may allow tags to transmit BL packets (Msg3) or retransmissions of BL packets (retransmission of Msg1) without contention.
  • FIG. 6 shows an example of a mapping scheme 600 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the mapping scheme 600 may implement aspects of a wireless communications system 100 and a wireless communications system 200.
  • the mapping scheme 600 may be implemented by an RF sources 205, tags 210, or a reader 215 as described with reference to FIG. 2.
  • a group of tags 605 may be provided with a set of pre-configured opportunities (e.g., inventory opportunities or time/frequency resources) and select an opportunity from the pre-configured set of opportunities to use to transmit a message to a reader.
  • Each opportunity may span a respective set of time resources 625 and span at least a portion of a respective sub-channel 620. As shown in FIG.
  • each of the tags 605-a through 605-e may occupy a different sub-channel 620 (e.g., a sub-channel 620-a, a sub-channel 620-b, a sub-channel 620-c, a sub-channel 620-d, or a sub-channel 620-e) of time resources 625-a.
  • each of the tags 605-f through 605-j may occupy a different sub-channel 620 of time resources 625-b.
  • each of the tags 605-k through 605-o may occupy a different sub-channel 620 of time resources 625-c.
  • an RF source may transmit a packet to the tags 605 that includes feedback information for the tags 605 regarding the message sent from the tags 605 to a reader using their respective inventory operations.
  • the feedback information may include a bitmap 610 and each bit 615 of the bitmap 610 may be mapped to a opportunity of the set of pre-configured opportunities.
  • the mapping between the opportunities and the bits of the bitmap may be in accordance to a frequency-first, time-second mapping scheme.
  • the bit 615 in position 1 may correspond to the opportunity used by tag 605-a to transit the message to the reader
  • the bit 615 in position 2 may correspond to the opportunity used by the tag 605-b to transmit the message to the reader
  • the bit 615 in position 3 may correspond to the opportunity used by tag 605-c to transit the message to the reader
  • the bit 615 in position 4 may correspond to the opportunity used by tag 605-d to transit the message to the reader
  • the bit 615 in position 5 may correspond to the opportunity used by tag 605-e to transit the message to the reader
  • so on with the last bit 615 or the bit 615 in position 15 corresponding to the opportunity used by the tag 605-o to transmit the message to the reader.
  • the mapping between the opportunities and the bits of the bitmap may be in accordance to a time-first, frequency-second mapping scheme.
  • the bit 615 in position 1 may correspond to the opportunity used by tag 605-a to transit the message to the reader
  • the bit 615 in position 2 may correspond to the opportunity used by the tag 605-f to transmit the message to the reader
  • the bit 615 in position 3 may correspond to the opportunity used by tag 605-k to transit the message to the reader
  • the bit 615 in position 4 may correspond to the opportunity used by tag 605-b to transit the message to the reader
  • the bit 615 in position 5 may correspond to the opportunity used by tag 605-g to transit the message to the reader
  • so on with the last bit 615 or the bit 615 in position 15 corresponding to the opportunity used by the tag 605-o to transmit the message to the reader.
  • the tags 605 may be aware of the mapping scheme. For example, prior to transmitting the message to the reader, the tags 605 may receive control signaling indicating the mapping scheme. Upon receiving the packet from the RF source, the tags 605 may utilize the mapping scheme to identify a bit 615 in the bitmap 610 of the packet. Once a tag 605 identifies their respective bit 615, the tag 605 may determine a decoding result of their message sent to the reader based on a logic value of the identified bit 615 (e.g., a logic value of 1 equals ACK and a logic value of 0 equals NACK) .
  • a logic value of the identified bit 615 e.g., a logic value of 1 equals ACK and a logic value of 0 equals NACK
  • the tag 605-h may identify the bit 615 in position 8 and determine that its message was not successfully decoded by the reader based on a logic value of the bit 615 being 0.
  • FIG. 7 shows an example of a feedback scheme 700 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the feedback scheme 700 may implement aspects of a wireless communications system 100 and a wireless communications system 200.
  • the feedback scheme 700 may be implemented by an RF sources 205, tags 210, or a reader 215 as described with reference to FIG. 2.
  • a single FL packet 725 may include feedback for messages transmitted by a same tag or tags over multiple slots 730.
  • an RF source may transmit a FL packet 725 during the slot 730-a to a tag.
  • the tag may transmit BL packets 710 using the sub-channel 720 during the slot 730-b, the slot 730-c, and the slot 730-d to a reader.
  • the reader may monitor the sub-channel 720 during the slot 730-b, the slot 730-c, and the slot 730-d and determine a decoding result of the BL packets 710.
  • the reader may successfully decode the BL packets 710 during the slot 730-b and the slot 730-d and unsuccessfully decode the BL packet 710 during the slot 730-c.
  • the reader may determine ACK for BL packets 710 received during the slot 730-d and the slot 730-b and NACK for the BL packet 710 received during the slot 730-c.
  • the reader may forward the decoding results of the BL packets 710 to the RF reader and the RF reader may generate a FL packet 725 to transmit during the slot 730-e.
  • the FL packet 725 may include the decoding results of the BL packets 710 in the form of a bitmap.
  • the number of bits included in the bitmap may be equal to the number of BL packets 710 transmitted by the tag. In the example of FIG. 7, the number of bits may be equal to three. Further, each bit in the bitmap may correspond to a different BL packet 710 transmitted by the tag and an order of the bits may depend on the time at which each BL packet 710 was transmitted.
  • the first bit in the bitmap may correspond to the BL packet 712 transmitted during the slot 730-b
  • the second bit in the bitmap may correspond to the BL packet 710 transmitted during the slot 730-c
  • the third bit in the bitmap may correspond to the BL packet 710 transmitted during the slot 730-d.
  • a logic value of the bit of the bitmap may indicate a decoding result for the respective BL packet 710. For example, a logic value of 0 may indicate NACK and a logic value of 1 may indicate ACK. Thus, the resulting bitmap for the BL packets 710 may be 1, 0, 1.
  • the tag may determine ACK for BL packets 710 received during the slot 730-d and the slot 730-b and NACK for the BL packet 710 received during the slot 730-c that based on the location of the bits in the bitmap and their respective logic states.
  • the number of bits included in the bitmap may be equal to one.
  • a logic value of the one bit may indicate a collective decoding result for the BL packets 710. For example, a logic value of 1 may indicate that all BL packets 710 were successfully received by the reader (e.g., ACK for all BL packets 710) and a logic value of 0 may indicate that at least BL packet 710 was not successfully received by the reader (e.g., NACK for at least one BL packet 710) .
  • the FL packet 725-b may include a bit with a logic value of 0 due to the BL packet 710 transmitted during the slot 730-c not being received successfully by the reader.
  • the tag may determine NACK for all of the BL packet 710 based on the logic value of the bit included in the bitmap.
  • FIG. 8 shows an example of a feedback scheme 800 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the feedback scheme 800 may implement aspects of a wireless communications system 100 and a wireless communications system 200.
  • the feedback scheme 800 may be implemented by an RF sources 205, tags 210, or a reader 215 as described with reference to FIG. 2.
  • an RF source may transmit a FL packet 825 during the slot 830-a to a group of tags.
  • the group of tags may transmit BL packets 810 to a reader using pre-configured opportunities.
  • Each opportunity may span a respective set of time resources (e.g., a slot 830) and a portion of a respective sub-channel 820.
  • each tag of a first group of three tags may occupy a different sub-channel 820 (e.g., a sub-channel 820-a, a sub-channel 820-b, or a sub-channel 820-c) of a slot 830-b.
  • each tag of a second set of three tags may occupy a different sub-channel 820 of a slot 830-c.
  • each tag of a third group of three tags may occupy a different sub-channel 820 of a slot 830-d.
  • the reader may monitor the sub-channels 820 during the slot 830-b, the slot 830-c, and the slot 830-d and determine a decoding result of the BL packets 810. In one example, the reader may successfully decode all of the BL packets 810 during the slot 830-b and the slot 830-d and may unsuccessfully decode at least one BL packet 810 during the slot 830-c (e.g., the BL packet 810 transmitted using the sub-channel 820-b) .
  • the reader may determine ACK for BL packets 810 received during the slot 830-d and the slot 830-b and NACK for the BL packets 810 received during the slot 830-c due to the reader not successfully receiving the BL packet 810 using the sub-channel 820-b during the slot 830-c.
  • the reader may determine ACK for BL packets 810 received using the sub-channel 820-a and the sub-channel 820-c during the slot 830-b, the slot 830-c, and the slot 830-d and NACK for the BL packets 810 using the sub-channel 820-b during the slot 830-b, the slot 830-c, and the slot 830-d due to the reader not successfully receiving the BL packet 810 using the sub-channel 820-b during the slot 830-c.
  • the reader may forward the decoding results of the BL packets 810 to the RF reader and the RF reader may generate a FL packet 825 to transmit during the slot 830-e.
  • the FL packet 825 may include the feedback information for the BL packets 810.
  • the FL packet 825 may include the decoding results of the BL packets 810 in the form of a bitmap.
  • the number of bits included in the bitmap may be equal to the number of consecutive slots 830 or the number of sub-channels 820 used to transmit the BL packets 810. For example, as shown in FIG. 8, the number of bits included in the bitmap may be equal to three corresponding to the three sub-channels 820 or three slots 830.
  • each bit in the bitmap may correspond to a different slot 830 or a different sub-channel 820 used to transmit the BL packets 810 and an order of the bits may depend on a time domain order of the slots 830 or a frequency domain order of the sub-channels 320.
  • a first bit in the bitmap may correspond to the BL packets 810 transmitted during the slot 830-b
  • a second bit in the bitmap may correspond to the BL packets 810 transmitted during the slot 830-c
  • a third bit in the bitmap may correspond to the BL packet 810 transmitted during the slot 830-d.
  • the first bit in the bitmap may correspond to the BL packets 810 transmitted using the sub-channel 820-a
  • the second bit in the bitmap may correspond to the BL packets 810 transmitted using the sub-channel 820-b
  • the third bit in the bitmap may correspond to the BL packet 810 transmitted using the sub-channel 820-c.
  • the tags may be provided with the mapping between the bits and the sub-channels 820 or the slots 830.
  • a logic value of a bit in the bitmap may indicate a collective decoding result of the BL packets 810 of the respective slot 830 or sub-channel 820.
  • a bit with a logic value of 1 may indicate that all BL packets 810 of the respective slot 830 or the respective sub-channel 820 were successfully received by the reader (e.g., ACK) and a bit with a logic value of 0 may indicate that at least BL packet 810 of the respective slot 830 or the respective sub-channel 820 was not successfully received by the reader (e.g., NACK) .
  • the bitmap of the FL packet 825 may include 1, 0, 1.
  • a tag may identify a bit in the bitmap based on which slot 830 or sub-channel 820 was used by the tag to transmit the BL packet 810 and determine the decoding result of the BL packet 810 based on the logic value of the bit.
  • FIG. 8 illustrates grouping the tags by sub-channel 820 or by slot 830, however, other groupings of tags are possible.
  • FIG. 9 shows an example of a feedback scheme 900 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the feedback scheme 900 may implement aspects of a wireless communications system 100 and a wireless communications system 200.
  • the feedback scheme 900 may be implemented by an RF sources 205, tags 210, or a reader 215 as described with reference to FIG. 2.
  • an RF source may multiplex feedback for multiple tags in a single packet.
  • a number of feedback responses multiplexed in the packet may be pre-configured. For example, at slot 930-a, a group of tags (e.g., at least ten tags) may receive a FL packet 925 indicating that five feedback responses (e.g., ACK/NACK) may be multiplexed in a packet.
  • ACK/NACK feedback responses
  • the FL packet 925 received during the slot 930-a may indicate that a first FL packet 925 may include feedback responses for a first tag, a second tag, a third tag, a fourth tag, and a fifth tag and a second FL packet 925 may include feedback responses for a sixth tag, a seventh tag, an eighth tag, a ninth tag, and a tenth tag.
  • the first tag, the second tag, the third tag, the fourth tag, and the fifth tag may transmit BL packets 910 to a reader during the slot 930-b using different sub-channels 920 (e.g., the sub-channel 920-a, the sub-channel 920-b, the sub-channel 920-c, the sub-channel 920-d, or the sub-channel 920-e) and the sixth tag, the seventh tag, the eighth tag, the ninth tag, and the tenth tag may transmit BL packets 910 to the reader during the slot 930-c using different sub-channels 920.
  • sub-channels 920 e.g., the sub-channel 920-a, the sub-channel 920-b, the sub-channel 920-c, the sub-channel 920-d, or the sub-channel 920-e
  • the sixth tag, the seventh tag, the eighth tag, the ninth tag, and the tenth tag may transmit BL packets 910 to the reader during the slot 930-c using different sub-
  • the reader may monitor the sub-channels 920 during the slot 930-b and the slot 930-c for the BL packets 910 and determine a decoding result for each of BL packets 910 transmitted by the group of tags. The reader may then forward, to the RF reader, the decoding results.
  • the reader may transmit a first FL packet 925 during the slot 930-d to the group of tags that includes a decoding result for each of a BL packet 910 associated with the first tag, the second tag, the third tag, the fourth tag, and the fifth tag.
  • the RF source may transmit a second FL packet 925 during the slot 930-e to the group of tags that includes a decoding result for each of a BL packet 910 associated with the sixth tag, the seventh tag, the eighth tag, the ninth tag, and the tenth tag.
  • the decoding results included in the first FL packet 925 and the second FL packet 925 may be in a form of a bitmap as described in FIG. 4 and the number of bits included in the bitmap may be equal to five (e.g., one for each tag) .
  • the first tag, the second tag, the third tag, the fourth tag, and the fifth tag may identify a respective bit in the bitmap based on which slot 930 and/or sub-channel 920 was used by the tag to transmit the respective BL packet 910 and determine the decoding result of the BL packet 910 based on the logic value of the respective bit.
  • the sixth tag, the seventh tag, the eighth tag, the ninth tag, and the tenth tag may identify a respective bit in the bitmap based on which slot 930 and/or sub-channel 920 was used by the tag to transmit the respective BL packet 910 and determine the decoding result of the BL packet 910 based on the logic value of the respective bit.
  • the tags may identify which FL packet 925 includes its feedback response based on a temporal mapping between the slots 930 used to transmit the BL packets 910 and the slots used to receive the FL packets 925.
  • FIG. 10 shows an example of a feedback scheme 1000 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the feedback scheme 1000 may implement aspects of a wireless communications system 100 and a wireless communications system 200.
  • the feedback scheme 1000 may be implemented by an RF source 205, tags 210, or a reader 215 as described with reference to FIG. 2.
  • an RF source may transmit a FL packet 1025 during a slot 1030-a to a group of tags that includes at least a first tag, a second tag, a third tag, a fourth tag, and a fifth tag.
  • the FL packet 1025 may include a read command.
  • the first tag, the second tag, the third tag, the fourth tag, and the fifth tag may transmit a BL packet 1010 to the reader using different sub-channels 1020 (e.g., a sub-channel 1020-a, a sub-channel 1020-b, a sub-channel 1020-c, a sub-channel 1020-d, and a sub-channel 1020-e) of a slot 1030-b.
  • a BL packet 1010 transmitted over the slot 1030-b may include an ID of a tag transmitting the BL packet 1010.
  • the reader may monitor the slot 1030-b for the BL packets 1010 from the tags and determine a decoding result for each of the BL packets 1010 (e.g., a decoding result of the tags IDs) transmitted during the slot 1030-b.
  • the reader may fail to decode the BL packet 1010 transmitted from the third tag using the sub-channel 1020-c and the BL packet 1010 transmitted from the fifth tag using the sub-channel 1020-e.
  • the remaining BL packets 1010 may be successfully decoded by the reader. Further, the reader may forward the decoding results to the RF source.
  • the RF source may generate a FL packet 1025 and transmit the FL packet 1025 to the tags during the slot 1030-c.
  • the FL packet 1025 may include a preamble, control information, a CRC, and a command multiplexed with a decoding result (NACK) of one or more of the BL packets 1010 transmitted during the slot 1030-b.
  • the RF source may multiplex the NACK of sub-channel 1020-c and the NACK of sub-channel 1020-e with a command (e.g., a readrep command or a queryrep command) .
  • Control bits in the FL packet 1025 may include an indication of whether decoding result is multiplexed with a command or not.
  • the command may indicate time and frequency resources for a retransmission of each BL packet 1010 unsuccessfully decoded by the reader.
  • a first command may indicate the sub-channel 1020-c for the third tag and a second command may indicate the sub-channel 1020-d during the slot 1030-d for the fifth tag.
  • the tags may identify the decoding results of their respective BL packets 1010 transmitted during the slot 1030-c. If the tag identify that the decoding result comprises NACK, the tag may then identify the command multiplexed with the NACK of the BL packet 1010 and retransmit the BL packet 1010 using the time and frequency resources indicated in the command. For example, the third tag may identify a decoding result of NACK and retransmit its BL packet 1010 using the sub-channel 1020-c during the slot 1030-d as indicated in the first command multiplexed with the NACK correspond to the BL packet 1010 transmitting during the slot 1030-b using the sub-channel 1020-c.
  • FIG. 11 shows an example of a process flow 1100 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the process flow 1100 may implement, or be implemented by, aspects of a wireless communications system 100 and a wireless communications system 200.
  • the process flow 1100 may be performed by a device 1105-a, a device 1105-b, and devices 1105-c which may be examples of an RF source 205, a reader 215, and tags 210 as described with reference to FIG. 2, respectively.
  • Alternative examples of the following may be implemented, where some steps are performed in a different order then described or are not performed at all. In some cases, steps may include additional features not mentioned below, or further steps may be added.
  • the device 1105-a may send a first signal to the device 1105-b.
  • the device 1105-a may be an example of a reader and the device 1105-b may be an example of an RF source.
  • the device 1105-a and the device 1105-b may be separate devices (e.g., a bistatic system) or the device 1105-a and the device 1105-b may be included in a same device as different components (e.g., a monostatic system) .
  • the first signal may be an example of an FL inventory trigger, Msg2, FL read, or an FL data packet as described with reference to FIGs. 3A and 3B.
  • the device 1105-b may forward the first signal to a group of devices 1105-c that includes at least a first device 1105-c, a second device 1105-c, and a third device 1105-c.
  • the devices 1105-c may be examples of tags.
  • one or more devices 1105-c of the group may transmit a packet to the device 1105-a.
  • the first device 1105-c may transmit a first packet
  • the second device 1105-c may transmit a second packet
  • a third device 1105-c may transmit a third packet.
  • the group of devices 1105-c may receive a second signal that includes an indication of one or more sets of resources.
  • the first device 1105-c, the second device 1105-c, and the third device 1105-c may select or be assigned a set of resources of the one or more sets of resources and utilize the set of resources to transmit the first packet, the second packet, and the third packet, respectively.
  • the device 1105-a may monitor for the packets from the devices 1105-c and generate feedback for the packets.
  • the feedback may include a decoding result (e.g., ACK/NACK) for the packets transmitted at 1120.
  • the device 1105-a may successfully receive the first packet and the second packet and generate ACK for the first packet and the second packet.
  • the device 1105-a may not successfully receive the third packet and generate NACK for the third packet.
  • the device 1105-a may send the feedback to the device 1105-b.
  • the device 1105-b may transmit a fourth packet to the devices 1105-c that includes the feedback.
  • the feedback may include a bitmap that includes multiple bits and each bit of the multiple bits may be mapped to a set of resources of the one or more sets of resources. Further, an order of the bits in the bitmap may be based on a frequency domain first, time domain second mapping scheme or a time domain first, frequency domain second mapping scheme with respect to the one or more sets of resources.
  • the device 1105-b may transmit signaling to the devices 1105-c indicating the mapping scheme of the bits included in the bitmap.
  • a logic value of a bit included in the bitmap may indicate a decoding result of the packets transmitted by the devices 1105-c at 1120.
  • a logic value of 1 may indicate ACK and a logic value of 0 may indicate NACK.
  • the device 1105-b may set the first bit to a logic value of 1, the second bit to a logic value of 1, and the third bit to a logic value of 0.
  • each of the devices 1105-c may generate a sequence.
  • the first device 1105-c may generate a first sequence
  • the second device 1105-c may generate a second sequence
  • the third device 1105-c may generate a third sequence.
  • a sequence generated by a given device may be unique meaning that no two devices 1105-c may generate the same sequence.
  • the device 1105-c may generate their sequence based on an ID associated with the device 1105-c.
  • the devices 1105-c may then provide the sequences to the device 1105-a (e.g., in the first packet, the second packet, and the third packet) .
  • the device 1105-a may not receive the sequence corresponding to the device 1105-c that transmitted the packet.
  • the device 1105-a may receive the first sequence and the second sequence, but not receive the third sequence. Further, device 1105-a may forward the sequences to the device 1105-b along with the feedback at 1130.
  • the fourth packet may include sequences for devices 1105-c whose packets have been successfully decoded by the device 1105-a at 1120.
  • the fourth packet may include the first sequence and the second sequence.
  • a device 1105-c may inspect the fourth packet and determine a decoding result (e.g., ACK or NACK) of the packet transmitted at 1120 based on a logic value of a bit corresponding to the set of resources used to transmit the packet or a presence or absence of the sequence corresponding to the device in the fourth packet.
  • the feedback message sent to the device 1105-a to the device 1105-b at 1130 may include the bitmap or the sequence as described with regard to the fourth packet. Either the device 1105-a or the device 1105-b may generate a packet with the bitmap and/or sequences.
  • one or more of the devices 1105-c may potentially transmit a fifth packet to the device 1105-a in response to the fourth packet.
  • the first device and the second device may transmit the fifth packet to the device 1105-a and the fifth packet may be an example of Msg3 or a BL data packet.
  • the third device may transmit the fifth packet to the device 1105-a and the fifth packet may be an example of a retransmission of the third packet.
  • the fourth packet may also include an indication of one or more second sets of resources that the devices 1105-c may utilize to transmit the fifth packet to the device 1105-a.
  • FIG. 12 shows a block diagram 1200 of a device 1205 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the device 1205 may be an example of aspects of a UE 115 or a network entity 105 as described herein.
  • the device 1205 may include a receiver 1210, a transmitter 1215, and a communications manager 1220.
  • the device 1205, or one or more components of the device 1205 may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1210 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to multi-device feedback using a single packet) . Information may be passed on to other components of the device 1205.
  • the receiver 1210 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 1215 may provide a means for transmitting signals generated by other components of the device 1205.
  • the transmitter 1215 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to multi-device feedback using a single packet) .
  • the transmitter 1215 may be co-located with a receiver 1210 in a transceiver module.
  • the transmitter 1215 may utilize a single antenna or a set of multiple antennas.
  • the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations thereof or various components thereof may be examples of means for performing various aspects of multi-device feedback using a single packet as described herein.
  • the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
  • the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) .
  • the hardware may include at least one of a processor, a digital signal processor (DSP) , a central processing unit (CPU) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure.
  • DSP digital signal processor
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • microcontroller discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure.
  • At least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
  • the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor. If implemented in code executed by at least one processor, the functions of the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
  • code e.g., as communications management software or firmware
  • the communications manager 1220 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1210, the transmitter 1215, or both.
  • the communications manager 1220 may receive information from the receiver 1210, send information to the transmitter 1215, or be integrated in combination with the receiver 1210, the transmitter 1215, or both to obtain information, output information, or perform various other operations as described herein.
  • the communications manager 1220 may support wireless communication in accordance with examples as disclosed herein.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for receiving, from a second device and based on transmitting the first signal, a second signal that indicates a decoding result of a first packet associated with a third device and a decoding result of a second packet associated with a fourth device, the set of multiple devices including at least the third device and the fourth device.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting, to the third device and the fourth device, a third packet that indicates the decoding result of the first packet and the decoding result of the second packet based on receiving the second signal.
  • the communications manager 1220 may support wireless communication in accordance with examples as disclosed herein.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for receiving a first signal from a second device.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting, based on receiving the first signal, a first packet to a third device using a first set of resources.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for receiving, from the second device and based on transmitting the first packet, a second packet that indicates a decoding result of the first packet and a decoding result of a third packet associated with a fourth device.
  • the communications manager 1220 may support wireless communication in accordance with examples as disclosed herein.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for monitoring a first set of resources for a first packet from the first device of the set of multiple devices.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for monitoring a second set of resources for a second packet from a second device of the set of multiple devices.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting, to the first device and the second device, a third packet that indicates a decoding result of the first packet associated with the first device and a decoding result of the second packet associated with the second device, where the decoding result of the first packet is based on monitoring the first set of resources and the decoding result of the second packet is based on monitoring the second set of resources.
  • the device 1205 e.g., at least one processor controlling or otherwise coupled with the receiver 1210, the transmitter 1215, the communications manager 1220, or a combination thereof
  • the device 1205 may support techniques for more efficient utilization of communication resources.
  • FIG. 13 shows a block diagram 1300 of a device 1305 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the device 1305 may be an example of aspects of a device 1205, a UE 115, or a network entity 105 as described herein.
  • the device 1305 may include a receiver 1310, a transmitter 1315, and a communications manager 1320.
  • the device 1305, or one or more components of the device 1305 (e.g., the receiver 1310, the transmitter 1315, and the communications manager 1320) , may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1310 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to multi-device feedback using a single packet) . Information may be passed on to other components of the device 1305.
  • the receiver 1310 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 1315 may provide a means for transmitting signals generated by other components of the device 1305.
  • the transmitter 1315 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to multi-device feedback using a single packet) .
  • the transmitter 1315 may be co-located with a receiver 1310 in a transceiver module.
  • the transmitter 1315 may utilize a single antenna or a set of multiple antennas.
  • the device 1305, or various components thereof may be an example of means for performing various aspects of multi-device feedback using a single packet as described herein.
  • the communications manager 1320 may include an FL packet transmitter 1325, a feedback component 1330, a response component 1335, an FL packet receiver 1340, a BL packet transmitter 1345, a monitoring component 1350, or any combination thereof.
  • the communications manager 1320 may be an example of aspects of a communications manager 1220 as described herein.
  • the communications manager 1320, or various components thereof may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1310, the transmitter 1315, or both.
  • the communications manager 1320 may receive information from the receiver 1310, send information to the transmitter 1315, or be integrated in combination with the receiver 1310, the transmitter 1315, or both to obtain information, output information, or perform various other operations as described herein.
  • the communications manager 1320 may support wireless communication in accordance with examples as disclosed herein.
  • the FL packet transmitter 1325 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the feedback component 1330 is capable of, configured to, or operable to support a means for receiving, from a second device and based on transmitting the first signal, a second signal that indicates a decoding result of a first packet associated with a third device and a decoding result of a second packet associated with a fourth device, the set of multiple devices including at least the third device and the fourth device.
  • the response component 1335 is capable of, configured to, or operable to support a means for transmitting, to the third device and the fourth device, a third packet that indicates the decoding result of the first packet and the decoding result of the second packet based on receiving the second signal.
  • the communications manager 1320 may support wireless communication in accordance with examples as disclosed herein.
  • the FL packet receiver 1340 is capable of, configured to, or operable to support a means for receiving a first signal from a second device.
  • the BL packet transmitter 1345 is capable of, configured to, or operable to support a means for transmitting, based on receiving the first signal, a first packet to a third device using a first set of resources.
  • the response component 1335 is capable of, configured to, or operable to support a means for receiving, from the second device and based on transmitting the first packet, a second packet that indicates a decoding result of the first packet and a decoding result of a third packet associated with a fourth device.
  • the communications manager 1320 may support wireless communication in accordance with examples as disclosed herein.
  • the FL packet transmitter 1325 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the monitoring component 1350 is capable of, configured to, or operable to support a means for monitoring a first set of resources for a first packet from the first device of the set of multiple devices.
  • the monitoring component 1350 is capable of, configured to, or operable to support a means for monitoring a second set of resources for a second packet from a second device of the set of multiple devices.
  • the response component 1335 is capable of, configured to, or operable to support a means for transmitting, to the first device and the second device, a third packet that indicates a decoding result of the first packet associated with the first device and a decoding result of the second packet associated with the second device, where the decoding result of the first packet is based on monitoring the first set of resources and the decoding result of the second packet is based on monitoring the second set of resources.
  • FIG. 14 shows a block diagram 1400 of a communications manager 1420 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the communications manager 1420 may be an example of aspects of a communications manager 1220, a communications manager 1320, or both, as described herein.
  • the communications manager 1420, or various components thereof, may be an example of means for performing various aspects of multi-device feedback using a single packet as described herein.
  • the communications manager 1420 may include an FL packet transmitter 1425, a feedback component 1430, a response component 1435, an FL packet receiver 1440, a BL packet transmitter 1445, a monitoring component 1450, a resource component 1455, a sequence component 1460, or any combination thereof.
  • Each of these components, or components or subcomponents thereof may communicate, directly or indirectly, with one another (e.g., via one or more buses) which may include communications within a protocol layer of a protocol stack, communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with a network entity 105, between devices, components, or virtualized components associated with a network entity 105) , or any combination thereof.
  • the communications manager 1420 may support wireless communication in accordance with examples as disclosed herein.
  • the FL packet transmitter 1425 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the feedback component 1430 is capable of, configured to, or operable to support a means for receiving, from a second device and based on transmitting the first signal, a second signal that indicates a decoding result of a first packet associated with a third device and a decoding result of a second packet associated with a fourth device, the set of multiple devices including at least the third device and the fourth device.
  • the response component 1435 is capable of, configured to, or operable to support a means for transmitting, to the third device and the fourth device, a third packet that indicates the decoding result of the first packet and the decoding result of the second packet based on receiving the second signal.
  • the resource component 1455 is capable of, configured to, or operable to support a means for transmitting, to the set of multiple devices, a third signal that includes one or more sets of resources, where a first set of resources of the one or more sets of resources corresponds to the third device and a second set of resources of the one or more sets of resources corresponds to the fourth device.
  • the third packet includes a bitmap including a set of multiple bits, each bit of the set of multiple bits mapped to a set of resources of the one or more sets of resources.
  • an order of the set of multiple bits in the bitmap are based on a frequency domain first, time domain second mapping scheme or a time domain first, frequency domain second mapping scheme.
  • a logic value of a bit corresponding to the first set of resources of the bitmap indicates the decoding result of the first packet and a logic value of a bit corresponding to the second set of resources of the bitmap indicates the decoding result of the second packet.
  • the decoding result of the first packet includes one of ACK feedback or NACK feedback and the decoding result of the second packet includes one of ACK feedback or NACK feedback.
  • the third packet further includes an indication of a third set of resources and a fourth set of resources allocated for transmissions responsive to the third packet, the third set of resources mapped to the bit corresponding to the first set of resources of the bitmap and the fourth set of resources mapped to the bit corresponding to the first set of resources of the bitmap.
  • the feedback component 1430 is capable of, configured to, or operable to support a means for receiving the second signal that includes a first sequence associated with the third device and a second sequence associated with the fourth device.
  • the response component 1435 is capable of, configured to, or operable to support a means for transmitting the third packet that includes the first sequence and the second sequence, where the first sequence indicates that the decoding result of the first packet includes acknowledgment feedback and the second sequence indicates that the decoding result of the second packet includes acknowledgment feedback.
  • the response component 1435 is capable of, configured to, or operable to support a means for transmitting an indication of a decoding result of a fourth packet associated with a fifth device, where the indication includes NACK based on an absence of a sequence associated with the fourth device in the third packet.
  • the third packet further includes an indication of a third set of resources and a fourth set of resources allocated for transmissions responsive to the third packet, the third set of resources mapped to the first sequence and the fourth set of resources mapped to the second sequence.
  • the first device includes an RF source device
  • the second device includes a reader device
  • the third device includes a first tag device
  • the fourth device includes a second tag device.
  • the communications manager 1420 may support wireless communication in accordance with examples as disclosed herein.
  • the FL packet receiver 1440 is capable of, configured to, or operable to support a means for receiving a first signal from a second device.
  • the BL packet transmitter 1445 is capable of, configured to, or operable to support a means for transmitting, based on receiving the first signal, a first packet to a third device using a first set of resources.
  • the response component 1435 is capable of, configured to, or operable to support a means for receiving, from the second device and based on transmitting the first packet, a second packet that indicates a decoding result of the first packet and a decoding result of a third packet associated with a fourth device.
  • the resource component 1455 is capable of, configured to, or operable to support a means for receiving, from the second device, a second signal that includes one or more sets of resources, where the first set of resources of the one or more sets of resources corresponds to the first device and a second set of resources of the one or more sets of resources corresponds to the fourth device.
  • the second packet includes a bitmap including a set of multiple bits, each bit of the set of multiple bits mapped to a set of resources of the one or more sets of resources.
  • an order of the set of multiple bits in the bitmap are based on a frequency domain first, time domain second mapping scheme or a time domain first, frequency domain second mapping scheme.
  • the feedback component 1430 is capable of, configured to, or operable to support a means for determining the decoding result of the first packet based on a logic value of a bit corresponding to the first set of resources of the bitmap.
  • the decoding result of the first packet includes one of ACK feedback or NACK feedback and the decoding result of the third packet includes one of ACK feedback or NACK feedback.
  • the resource component 1455 is capable of, configured to, or operable to support a means for determining a third set of resources based on the second packet including a mapping between the third set of resources and the bit corresponding to the first set of resources of the bitmap.
  • the BL packet transmitter 1445 is capable of, configured to, or operable to support a means for transmitting, to the third device, a third signal responsive to the second packet using the third set of resources.
  • the sequence component 1460 is capable of, configured to, or operable to support a means for generating a first sequence associated with the first device, where the first packet includes the first sequence.
  • the feedback component 1430 is capable of, configured to, or operable to support a means for determining that the decoding result of the first packet includes ACK feedback based on the second packet including the first sequence.
  • the resource component 1455 is capable of, configured to, or operable to support a means for determining a second set of resources based on the second packet including a mapping between the second set of resources and the first sequence.
  • the BL packet transmitter 1445 is capable of, configured to, or operable to support a means for transmitting, to the third device, a second signal responsive to the second packet using the second set of resources.
  • the sequence component 1460 is capable of, configured to, or operable to support a means for generating a first sequence associated with the first device, where the first packet includes the first sequence.
  • the feedback component 1430 is capable of, configured to, or operable to support a means for determining that the decoding result of the first packet includes NACK feedback based on an absence of the first sequence in the second packet.
  • the first device includes a tag device
  • the second device includes an RF source device
  • the third device includes a reader device
  • the fourth device includes a second tag device.
  • the communications manager 1420 may support wireless communication in accordance with examples as disclosed herein.
  • the FL packet transmitter 1425 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the monitoring component 1450 is capable of, configured to, or operable to support a means for monitoring a first set of resources for a first packet from the first device of the set of multiple devices.
  • the monitoring component 1450 is capable of, configured to, or operable to support a means for monitoring a second set of resources for a second packet from a second device of the set of multiple devices.
  • the response component 1435 is capable of, configured to, or operable to support a means for transmitting, to the first device and the second device, a third packet that indicates a decoding result of the first packet associated with the first device and a decoding result of the second packet associated with the second device, where the decoding result of the first packet is based on monitoring the first set of resources and the decoding result of the second packet is based on monitoring the second set of resources.
  • the resource component 1455 is capable of, configured to, or operable to support a means for transmitting, to the set of multiple devices, a second signal that includes one or more sets of resources that include the first set of resources and the second set of resources.
  • the third packet includes a bitmap including a set of multiple bits, each bit of the set of multiple bits mapped to a set of resources of the one or more sets of resources.
  • a logic value of a bit corresponding to the first set of resources of the bitmap indicates the decoding result of the first packet and a logic value of a bit corresponding to the second set of resources of the bitmap indicates the decoding result of the second packet.
  • FIG. 15 shows a diagram of a system 1500 including a device 1505 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the device 1505 may be an example of or include the components of a device 1205, a device 1305, or a UE 115 as described herein.
  • the device 1505 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof.
  • the device 1505 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 1520, an input/output (I/O) controller 1510, a transceiver 1515, an antenna 1525, at least one memory 1530, code 1535, and at least one processor 1540. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1545) .
  • a bus 1545 e.g., a bus 1545
  • the I/O controller 1510 may manage input and output signals for the device 1505.
  • the I/O controller 1510 may also manage peripherals not integrated into the device 1505.
  • the I/O controller 1510 may represent a physical connection or port to an external peripheral.
  • the I/O controller 1510 may utilize an operating system such as or another known operating system.
  • the I/O controller 1510 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 1510 may be implemented as part of one or more processors, such as the at least one processor 1540.
  • a user may interact with the device 1505 via the I/O controller 1510 or via hardware components controlled by the I/O controller 1510.
  • the device 1505 may include a single antenna 1525. However, in some other cases, the device 1505 may have more than one antenna 1525, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the transceiver 1515 may communicate bi-directionally, via the one or more antennas 1525, wired, or wireless links as described herein.
  • the transceiver 1515 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1515 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1525 for transmission, and to demodulate packets received from the one or more antennas 1525.
  • the transceiver 1515 may be an example of a transmitter 1215, a transmitter 1315, a receiver 1210, a receiver 1310, or any combination thereof or component thereof, as described herein.
  • the at least one memory 1530 may include random access memory (RAM) and read-only memory (ROM) .
  • the at least one memory 1530 may store computer-readable, computer-executable code 1535 including instructions that, when executed by the at least one processor 1540, cause the device 1505 to perform various functions described herein.
  • the code 1535 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory.
  • the code 1535 may not be directly executable by the at least one processor 1540 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the at least one memory 1530 may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • BIOS basic I/O system
  • the at least one processor 1540 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the at least one processor 1540 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the at least one processor 1540.
  • the at least one processor 1540 may be configured to execute computer-readable instructions stored in a memory (e.g., the at least one memory 1530) to cause the device 1505 to perform various functions (e.g., functions or tasks supporting multi-device feedback using a single packet) .
  • the device 1505 or a component of the device 1505 may include at least one processor 1540 and at least one memory 1530 coupled with or to the at least one processor 1540, the at least one processor 1540 and at least one memory 1530 configured to perform various functions described herein.
  • the at least one processor 1540 may include multiple processors and the at least one memory 1530 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
  • the communications manager 1520 may support wireless communication in accordance with examples as disclosed herein.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for receiving, from a second device and based on transmitting the first signal, a second signal that indicates a decoding result of a first packet associated with a third device and a decoding result of a second packet associated with a fourth device, the set of multiple devices including at least the third device and the fourth device.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting, to the third device and the fourth device, a third packet that indicates the decoding result of the first packet and the decoding result of the second packet based on receiving the second signal.
  • the communications manager 1520 may support wireless communication in accordance with examples as disclosed herein.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for receiving a first signal from a second device.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting, based on receiving the first signal, a first packet to a third device using a first set of resources.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for receiving, from the second device and based on transmitting the first packet, a second packet that indicates a decoding result of the first packet and a decoding result of a third packet associated with a fourth device.
  • the communications manager 1520 may support wireless communication in accordance with examples as disclosed herein.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for monitoring a first set of resources for a first packet from the first device of the set of multiple devices.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for monitoring a second set of resources for a second packet from a second device of the set of multiple devices.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting, to the first device and the second device, a third packet that indicates a decoding result of the first packet associated with the first device and a decoding result of the second packet associated with the second device, where the decoding result of the first packet is based on monitoring the first set of resources and the decoding result of the second packet is based on monitoring the second set of resources.
  • the device 1505 may support techniques for more efficient utilization of communication resources.
  • the communications manager 1520 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 1515, the one or more antennas 1525, or any combination thereof.
  • the communications manager 1520 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1520 may be supported by or performed by the at least one processor 1540, the at least one memory 1530, the code 1535, or any combination thereof.
  • the code 1535 may include instructions executable by the at least one processor 1540 to cause the device 1505 to perform various aspects of multi-device feedback using a single packet as described herein, or the at least one processor 1540 and the at least one memory 1530 may be otherwise configured to, individually or collectively, perform or support such operations.
  • FIG. 16 shows a diagram of a system 1600 including a device 1605 that supports multi-device feedback using a single packet in accordance with one or more aspects of the present disclosure.
  • the device 1605 may be an example of or include the components of a device 1205, a device 1305, or a network entity 105 as described herein.
  • the device 1605 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, which may include communications over one or more wired interfaces, over one or more wireless interfaces, or any combination thereof.
  • the device 1605 may include components that support outputting and obtaining communications, such as a communications manager 1620, a transceiver 1610, an antenna 1615, at least one memory 1625, code 1630, and at least one processor 1635. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1640) .
  • buses
  • the transceiver 1610 may support bi-directional communications via wired links, wireless links, or both as described herein.
  • the transceiver 1610 may include a wired transceiver and may communicate bi-directionally with another wired transceiver. Additionally, or alternatively, in some examples, the transceiver 1610 may include a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the device 1605 may include one or more antennas 1615, which may be capable of transmitting or receiving wireless transmissions (e.g., concurrently) .
  • the transceiver 1610 may also include a modem to modulate signals, to provide the modulated signals for transmission (e.g., by one or more antennas 1615, by a wired transmitter) , to receive modulated signals (e.g., from one or more antennas 1615, from a wired receiver) , and to demodulate signals.
  • the transceiver 1610 may include one or more interfaces, such as one or more interfaces coupled with the one or more antennas 1615 that are configured to support various receiving or obtaining operations, or one or more interfaces coupled with the one or more antennas 1615 that are configured to support various transmitting or outputting operations, or a combination thereof.
  • the transceiver 1610 may include or be configured for coupling with one or more processors or one or more memory components that are operable to perform or support operations based on received or obtained information or signals, or to generate information or other signals for transmission or other outputting, or any combination thereof.
  • the transceiver 1610, or the transceiver 1610 and the one or more antennas 1615, or the transceiver 1610 and the one or more antennas 1615 and one or more processors or one or more memory components may be included in a chip or chip assembly that is installed in the device 1605.
  • the transceiver 1610 may be operable to support communications via one or more communications links (e.g., a communication link 125, a backhaul communication link 120, a midhaul communication link 162, a fronthaul communication link 168) .
  • a communications link 125 e.g., a communication link 125, a backhaul communication link 120, a midhaul communication link 162, a fronthaul communication link 168 .
  • the at least one memory 1625 may include RAM, ROM, or any combination thereof.
  • the at least one memory 1625 may store computer-readable, computer-executable code 1630 including instructions that, when executed by one or more of the at least one processor 1635, cause the device 1605 to perform various functions described herein.
  • the code 1630 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory.
  • the code 1630 may not be directly executable by a processor of the at least one processor 1635 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the at least one memory 1625 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the at least one processor 1635 may include multiple processors and the at least one memory 1625 may include multiple memories.
  • One or more of the multiple processors may be coupled with one or more of the multiple memories which may, individually or collectively, be configured to perform various functions herein (for example, as part of a processing system) .
  • the at least one processor 1635 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA, a microcontroller, a programmable logic device, discrete gate or transistor logic, a discrete hardware component, or any combination thereof) .
  • the at least one processor 1635 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into one or more of the at least one processor 1635.
  • the at least one processor 1635 may be configured to execute computer-readable instructions stored in a memory (e.g., one or more of the at least one memory 1625) to cause the device 1605 to perform various functions (e.g., functions or tasks supporting multi-device feedback using a single packet) .
  • a memory e.g., one or more of the at least one memory 1625
  • the device 1605 or a component of the device 1605 may include at least one processor 1635 and at least one memory 1625 coupled with one or more of the at least one processor 1635, the at least one processor 1635 and the at least one memory 1625 configured to perform various functions described herein.
  • the at least one processor 1635 may be an example of a cloud-computing platform (e.g., one or more physical nodes and supporting software such as operating systems, virtual machines, or container instances) that may host the functions (e.g., by executing code 1630) to perform the functions of the device 1605.
  • the at least one processor 1635 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device 1605 (such as within one or more of the at least one memory 1625) .
  • the at least one processor 1635 may be a component of a processing system.
  • a processing system may generally refer to a system or series of machines or components that receives inputs and processes the inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the device 1605) .
  • a processing system of the device 1605 may refer to a system including the various other components or subcomponents of the device 1605, such as the at least one processor 1635, or the transceiver 1610, or the communications manager 1620, or other components or combinations of components of the device 1605.
  • the processing system of the device 1605 may interface with other components of the device 1605, and may process information received from other components (such as inputs or signals) or output information to other components.
  • a chip or modem of the device 1605 may include a processing system and one or more interfaces to output information, or to obtain information, or both.
  • the one or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information, or a same interface configured to output information and to obtain information, among other implementations.
  • the one or more interfaces may refer to an interface between the processing system of the chip or modem and a transmitter, such that the device 1605 may transmit information output from the chip or modem.
  • the one or more interfaces may refer to an interface between the processing system of the chip or modem and a receiver, such that the device 1605 may obtain information or signal inputs, and the information may be passed to the processing system.
  • a first interface also may obtain information or signal inputs
  • a second interface also may output information or signal outputs.
  • a bus 1640 may support communications of (e.g., within) a protocol layer of a protocol stack. In some examples, a bus 1640 may support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack) , which may include communications performed within a component of the device 1605, or between different components of the device 1605 that may be co-located or located in different locations (e.g., where the device 1605 may refer to a system in which one or more of the communications manager 1620, the transceiver 1610, the at least one memory 1625, the code 1630, and the at least one processor 1635 may be located in one of the different components or divided between different components) .
  • the communications manager 1620 may manage aspects of communications with a core network 130 (e.g., via one or more wired or wireless backhaul links) .
  • the communications manager 1620 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • the communications manager 1620 may manage communications with other network entities 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other network entities 105.
  • the communications manager 1620 may support an X2 interface within an LTE/LTE-A wireless communications network technology to provide communication between network entities 105.
  • the communications manager 1620 may support wireless communication in accordance with examples as disclosed herein.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for receiving, from a second device and based on transmitting the first signal, a second signal that indicates a decoding result of a first packet associated with a third device and a decoding result of a second packet associated with a fourth device, the set of multiple devices including at least the third device and the fourth device.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for transmitting, to the third device and the fourth device, a third packet that indicates the decoding result of the first packet and the decoding result of the second packet based on receiving the second signal.
  • the communications manager 1620 may support wireless communication in accordance with examples as disclosed herein.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for receiving a first signal from a second device.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for transmitting, based on receiving the first signal, a first packet to a third device using a first set of resources.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for receiving, from the second device and based on transmitting the first packet, a second packet that indicates a decoding result of the first packet and a decoding result of a third packet associated with a fourth device.
  • the communications manager 1620 may support wireless communication in accordance with examples as disclosed herein.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for transmitting a first signal to a set of multiple devices.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for monitoring a first set of resources for a first packet from the first device of the set of multiple devices.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for monitoring a second set of resources for a second packet from a second device of the set of multiple devices.
  • the communications manager 1620 is capable of, configured to, or operable to support a means for transmitting, to the first device and the second device, a third packet that indicates a decoding result of the first packet associated with the first device and a decoding result of the second packet associated with the second device, where the decoding result of the first packet is based on monitoring the first set of resources and the decoding result of the second packet is based on monitoring the second set of resources.
  • the device 1605 may support techniques for more efficient utilization of communication resources.
  • the communications manager 1620 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the transceiver 1610, the one or more antennas 1615 (e.g., where applicable) , or any combination thereof.
  • the communications manager 1620 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1620 may be supported by or performed by the transceiver 1610, one or more of the at least one processor 1635, one or more of the at least one memory 1625, the code 1630, or any combination thereof (for example, by a processing system including at least a portion of the at least one processor 1635, the at least one memory 1625, the code 1630, or any combination thereof) .
  • the code 1630 may include instructions executable by one or more of the at least one processor 1635 to cause the device 1605 to perform various aspects of multi-device feedback using a single packet as described herein, or the at least one processor 1635 and the at least one memory 1625 may be otherwise configured to, individually or collectively, perform or support such operations.
  • FIG. 17 shows a flowchart illustrating a method 1700 that supports multi-device feedback using a single packet in accordance with aspects of the present disclosure.
  • the operations of the method 1700 may be implemented by a UE or a network entity or its components as described herein.
  • the operations of the method 1700 may be performed by a UE 115 or a network entity as described with reference to FIGs. 1 through 16.
  • a UE or a network entity may execute a set of instructions to control the functional elements of the UE or the network entity to perform the described functions.
  • the UE or the network entity may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting a first signal to a set of multiple devices.
  • the operations of block 1705 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1705 may be performed by an FL packet transmitter 1425 as described with reference to FIG. 14.
  • the method may include receiving, from a second device and based on transmitting the first signal, a second signal that indicates a decoding result of a first packet associated with a third device and a decoding result of a second packet associated with a fourth device, the set of multiple devices including at least the third device and the fourth device.
  • the operations of block 1710 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1710 may be performed by a feedback component 1430 as described with reference to FIG. 14.
  • the method may include transmitting, to the third device and the fourth device, a third packet that indicates the decoding result of the first packet and the decoding result of the second packet based on receiving the second signal.
  • the operations of block 1715 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1715 may be performed by a response component 1435 as described with reference to FIG. 14.
  • FIG. 18 shows a flowchart illustrating a method 1800 that supports multi-device feedback using a single packet in accordance with aspects of the present disclosure.
  • the operations of the method 1800 may be implemented by a UE or a network entity or its components as described herein.
  • the operations of the method 1800 may be performed by a UE 115 or a network entity as described with reference to FIGs. 1 through 16.
  • a UE or a network entity may execute a set of instructions to control the functional elements of the UE or the network entity to perform the described functions.
  • the UE or the network entity may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting a first signal to a set of multiple devices.
  • the operations of block 1805 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1805 may be performed by an FL packet transmitter 1425 as described with reference to FIG. 14.
  • the method may include transmitting, to the set of multiple devices, a third signal that includes one or more sets of resources, where a first set of resources of the one or more sets of resources corresponds to a third device and a second set of resources of the one or more sets of resources corresponds to a fourth device.
  • the operations of block 1810 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1810 may be performed by a resource component 1455 as described with reference to FIG. 14.
  • the method may include receiving, from a second device and based on transmitting the first signal, a second signal that indicates a decoding result of a first packet associated with the third device and a decoding result of a second packet associated with the fourth device, the set of multiple devices including at least the third device and the fourth device.
  • the operations of block 1815 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1815 may be performed by a feedback component 1430 as described with reference to FIG. 14.
  • the method may include transmitting, to the third device and the fourth device, a third packet that indicates the decoding result of the first packet and the decoding result of the second packet based on receiving the second signal.
  • the operations of block 1820 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1820 may be performed by a response component 1435 as described with reference to FIG. 14.
  • FIG. 19 shows a flowchart illustrating a method 1900 that supports multi-device feedback using a single packet in accordance with aspects of the present disclosure.
  • the operations of the method 1900 may be implemented by a UE or a network entity or its components as described herein.
  • the operations of the method 1900 may be performed by a UE 115 or a network entity as described with reference to FIGs. 1 through 16.
  • a UE or a network entity may execute a set of instructions to control the functional elements of the UE or the network entity to perform the described functions.
  • the UE or the network entity may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving a first signal from a second device.
  • the operations of block 1905 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1905 may be performed by an FL packet receiver 1440 as described with reference to FIG. 14.
  • the method may include transmitting, based on receiving the first signal, a first packet to a third device using a first set of resources.
  • the operations of block 1910 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1910 may be performed by a BL packet transmitter 1445 as described with reference to FIG. 14.
  • the method may include receiving, from the second device and based on transmitting the first packet, a second packet that indicates a decoding result of the first packet and a decoding result of a third packet associated with a fourth device.
  • the operations of block 1915 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1915 may be performed by a response component 1435 as described with reference to FIG. 14.
  • FIG. 20 shows a flowchart illustrating a method 2000 that supports multi-device feedback using a single packet in accordance with aspects of the present disclosure.
  • the operations of the method 2000 may be implemented by a UE or a network entity or its components as described herein.
  • the operations of the method 2000 may be performed by a UE 115 or a network entity as described with reference to FIGs. 1 through 16.
  • a UE or a network entity may execute a set of instructions to control the functional elements of the UE or the network entity to perform the described functions.
  • the UE or the network entity may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving a first signal from a second device.
  • the operations of block 2005 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2005 may be performed by an FL packet receiver 1440 as described with reference to FIG. 14.
  • the method may include receiving, from the second device, a second signal that includes one or more sets of resources, where a first set of resources of the one or more sets of resources corresponds to the first device and a second set of resources of the one or more sets of resources corresponds to a fourth device.
  • the operations of block 2010 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2010 may be performed by a resource component 1455 as described with reference to FIG. 14.
  • the method may include transmitting, based on receiving the first signal, a first packet to a third device using the first set of resources.
  • the operations of block 2015 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2015 may be performed by a BL packet transmitter 1445 as described with reference to FIG. 14.
  • the method may include receiving, from the second device and based on transmitting the first packet, a second packet that indicates a decoding result of the first packet and a decoding result of a third packet associated with the fourth device.
  • the operations of block 2020 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2020 may be performed by a response component 1435 as described with reference to FIG. 14.
  • FIG. 21 shows a flowchart illustrating a method 2100 that supports multi-device feedback using a single packet in accordance with aspects of the present disclosure.
  • the operations of the method 2100 may be implemented by a UE or a network entity or its components as described herein.
  • the operations of the method 2100 may be performed by a UE 115 or a network entity as described with reference to FIGs. 1 through 16.
  • a UE or a network entity may execute a set of instructions to control the functional elements of the UE or the network entity to perform the described functions.
  • the UE or the network entity may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting a first signal to a set of multiple devices.
  • the operations of block 2105 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2105 may be performed by an FL packet transmitter 1425 as described with reference to FIG. 14.
  • the method may include monitoring a first set of resources for a first packet from the first device of the set of multiple devices.
  • the operations of block 2110 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2110 may be performed by a monitoring component 1450 as described with reference to FIG. 14.
  • the method may include monitoring a second set of resources for a second packet from a second device of the set of multiple devices.
  • the operations of block 2115 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2115 may be performed by a monitoring component 1450 as described with reference to FIG. 14.
  • the method may include transmitting, to the first device and the second device, a third packet that indicates a decoding result of the first packet associated with the first device and a decoding result of the second packet associated with the second device, where the decoding result of the first packet is based on monitoring the first set of resources and the decoding result of the second packet is based on monitoring the second set of resources.
  • the operations of block 2120 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2120 may be performed by a response component 1435 as described with reference to FIG. 14.
  • FIG. 22 shows a flowchart illustrating a method 2200 that supports multi-device feedback using a single packet in accordance with aspects of the present disclosure.
  • the operations of the method 2200 may be implemented by a UE or a network entity or its components as described herein.
  • the operations of the method 2200 may be performed by a UE 115 or a network entity as described with reference to FIGs. 1 through 16.
  • a UE or a network entity may execute a set of instructions to control the functional elements of the UE or the network entity to perform the described functions.
  • the UE or the network entity may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting a first signal to a set of multiple devices.
  • the operations of block 2205 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2205 may be performed by an FL packet transmitter 1425 as described with reference to FIG. 14.
  • the method may include transmitting, to the set of multiple devices, a second signal that includes one or more sets of resources that include a first set of resources and a second set of resources.
  • the operations of block 2210 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2210 may be performed by a resource component 1455 as described with reference to FIG. 14.
  • the method may include monitoring the first set of resources for a first packet from the first device of the set of multiple devices.
  • the operations of block 2215 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2215 may be performed by a monitoring component 1450 as described with reference to FIG. 14.
  • the method may include monitoring the second set of resources for a second packet from a second device of the set of multiple devices.
  • the operations of block 2220 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2220 may be performed by a monitoring component 1450 as described with reference to FIG. 14.
  • the method may include transmitting, to the first device and the second device, a third packet that indicates a decoding result of the first packet associated with the first device and a decoding result of the second packet associated with the second device, where the decoding result of the first packet is based on monitoring the first set of resources and the decoding result of the second packet is based on monitoring the second set of resources.
  • the operations of block 2225 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2225 may be performed by a response component 1435 as described with reference to FIG. 14.
  • a method for wireless communication at a first device comprising: transmitting a first signal to a plurality of devices; receiving, from a second device and based at least in part on transmitting the first signal, a second signal that indicates a decoding result of a first packet associated with a third device and a decoding result of a second packet associated with a fourth device, the plurality of devices comprising at least the third device and the fourth device; and transmitting, to the third device and the fourth device, a third packet that indicates the decoding result of the first packet and the decoding result of the second packet based at least in part on receiving the second signal.
  • Aspect 2 The method of aspect 1, further comprising: transmitting, to the plurality of devices, a third signal that comprises one or more sets of resources, wherein a first set of resources of the one or more sets of resources corresponds to the third device and a second set of resources of the one or more sets of resources corresponds to the fourth device.
  • Aspect 3 The method of aspect 2, wherein the third packet comprises a bitmap comprising a plurality of bits, each bit of the plurality of bits mapped to a set of resources of the one or more sets of resources.
  • Aspect 4 The method of aspect 3, wherein an order of the plurality of bits in the bitmap are based on a frequency domain first, time domain second mapping scheme or a time domain first, frequency domain second mapping scheme.
  • Aspect 5 The method of any of aspects 3 through 4, wherein a logic value of a bit corresponding to the first set of resources of the bitmap indicates the decoding result of the first packet and a logic value of a bit corresponding to the second set of resources of the bitmap indicates the decoding result of the second packet.
  • Aspect 6 The method of aspect 5, wherein the decoding result of the first packet comprises one of ACK feedback or NACK feedback and the decoding result of the second packet comprises one of ACK feedback or NACK feedback.
  • Aspect 7 The method of any of aspects 5 through 6, wherein the third packet further comprises an indication of a third set of resources and a fourth set of resources allocated for transmissions responsive to the third packet, the third set of resources mapped to the bit corresponding to the first set of resources of the bitmap and the fourth set of resources mapped to the bit corresponding to the first set of resources of the bitmap.
  • Aspect 8 The method of any of aspects 1 through 7, wherein receiving the second signal comprises: receiving the second signal that comprises a first sequence associated with the third device and a second sequence associated with the fourth device.
  • Aspect 9 The method of aspect 8, wherein transmitting the third packet comprises: transmitting the third packet that comprises the first sequence and the second sequence, wherein the first sequence indicates that the decoding result of the first packet comprises acknowledgment feedback and the second sequence indicates that the decoding result of the second packet comprises acknowledgment feedback.
  • Aspect 10 The method of aspect 9, wherein transmitting the third packet comprises: transmitting an indication of a decoding result of a fourth packet associated with a fifth device, wherein the indication comprises NACK based at least in part on an absence of a sequence associated with the fourth device in the third packet.
  • Aspect 11 The method of any of aspects 8 through 10, wherein the third packet further comprises an indication of a third set of resources and a fourth set of resources allocated for transmissions responsive to the third packet, the third set of resources mapped to the first sequence and the fourth set of resources mapped to the second sequence.
  • Aspect 12 The method of any of aspects 1 through 11, wherein the first device comprises an RF source device, the second device comprises a reader device, the third device comprises a first tag device, and the fourth device comprises a second tag device.
  • a method for wireless communication at a first device comprising: receiving a first signal from a second device; transmitting, based at least in part on receiving the first signal, a first packet to a third device using a first set of resources; and receiving, from the second device and based at least in part on transmitting the first packet, a second packet that indicates a decoding result of the first packet and a decoding result of a third packet associated with a fourth device.
  • Aspect 14 The method of aspect 13, further comprising: receiving, from the second device, a second signal that comprises one or more sets of resources, wherein the first set of resources of the one or more sets of resources corresponds to the first device and a second set of resources of the one or more sets of resources corresponds to the fourth device.
  • Aspect 15 The method of aspect 14, wherein the second packet comprises a bitmap comprising a plurality of bits, each bit of the plurality of bits mapped to a set of resources of the one or more sets of resources.
  • Aspect 16 The method of aspect 15, wherein an order of the plurality of bits in the bitmap are based on a frequency domain first, time domain second mapping scheme or a time domain first, frequency domain second mapping scheme.
  • Aspect 17 The method of any of aspects 15 through 16, further comprising: determining the decoding result of the first packet based at least in part on a logic value of a bit corresponding to the first set of resources of the bitmap.
  • Aspect 18 The method of aspect 17, wherein the decoding result of the first packet comprises one of ACK feedback or NACK feedback and the decoding result of the third packet comprises one of ACK feedback or NACK feedback.
  • Aspect 19 The method of aspect 18, further comprising: determining a third set of resources based at least in part on the second packet comprising a mapping between the third set of resources and the bit corresponding to the first set of resources of the bitmap; and transmitting, to the third device, a third signal responsive to the second packet using the third set of resources.
  • Aspect 20 The method of any of aspects 13 through 19, further comprising: generating a first sequence associated with the first device, wherein the first packet comprises the first sequence; and determining that the decoding result of the first packet comprises ACK feedback based at least in part on the second packet comprising the first sequence.
  • Aspect 21 The method of aspect 20, further comprising: determining a second set of resources based at least in part on the second packet comprising a mapping between the second set of resources and the first sequence; and transmitting, to the third device, a second signal responsive to the second packet using the second set of resources.
  • Aspect 22 The method of any of aspects 13 through 21, further comprising: generating a first sequence associated with the first device, wherein the first packet comprises the first sequence; and determining that the decoding result of the first packet comprises negative ACK feedback based at least in part on an absence of the first sequence in the second packet.
  • Aspect 23 The method of any of aspects 13 through 22, wherein the first device comprises a tag device, the second device comprises an RF source device, the third device comprises a reader device, and the fourth device comprises a second tag device.
  • a method for wireless communication at a first device comprising: transmitting a first signal to a plurality of devices; monitoring a first set of resources for a first packet from the first device of the plurality of devices; monitoring a second set of resources for a second packet from a second device of the plurality of devices; and transmitting, to the first device and the second device, a third packet that indicates a decoding result of the first packet associated with the first device and a decoding result of the second packet associated with the second device, wherein the decoding result of the first packet is based at least in part on monitoring the first set of resources and the decoding result of the second packet is based at least in part on monitoring the second set of resources.
  • Aspect 25 The method of aspect 24, further comprising: transmitting, to the plurality of devices, a second signal that comprises one or more sets of resources that comprise the first set of resources and the second set of resources.
  • Aspect 26 The method of aspect 25, wherein the third packet comprises a bitmap comprising a plurality of bits, each bit of the plurality of bits mapped to a set of resources of the one or more sets of resources.
  • Aspect 27 The method of aspect 26, wherein a logic value of a bit corresponding to the first set of resources of the bitmap indicates the decoding result of the first packet and a logic value of a bit corresponding to the second set of resources of the bitmap indicates the decoding result of the second packet.
  • a first device for wireless communication comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first device to perform a method of any of aspects 1 through 12.
  • a first device for wireless communication comprising at least one means for performing a method of any of aspects 1 through 12.
  • Aspect 30 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 12.
  • a first device for wireless communication comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first device to perform a method of any of aspects 13 through 23.
  • Aspect 32 A first device for wireless communication, comprising at least one means for performing a method of any of aspects 13 through 23.
  • Aspect 33 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform a method of any of aspects 13 through 23.
  • a first device for wireless communication comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first device to perform a method of any of aspects 24 through 27.
  • Aspect 35 A first device for wireless communication, comprising at least one means for performing a method of any of aspects 24 through 27.
  • Aspect 36 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform a method of any of aspects 24 through 27.
  • LTE, LTE-A, LTE-A Pro, or NR may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks.
  • the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
  • UMB Ultra Mobile Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) . Any functions or operations described herein as being capable of being performed by a processor may be performed by multiple processors that, individually or collectively, are capable of performing the described functions or operations.
  • the functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
  • non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium.
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media. Any functions or operations described herein as being capable of being performed by a memory may be performed by multiple memories that, individually or collectively, are capable of performing the described functions or operations.
  • the article “a” before a noun is open-ended and understood to refer to “at least one” of those nouns or “one or more” of those nouns.
  • the terms “a, ” “at least one, ” “one or more, ” “at least one of one or more” may be interchangeable.
  • a claim recites “a component” that performs one or more functions, each of the individual functions may be performed by a single component or by any combination of multiple components.
  • the term “a component” having characteristics or performing functions may refer to “at least one of one or more components” having a particular characteristic or performing a particular function.
  • a component introduced with the article “a” using the terms “the” or “said” may refer to any or all of the one or more components.
  • a component introduced with the article “a” may be understood to mean “one or more components, ” and referring to “the component” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components.
  • subsequent reference to a component introduced as “one or more components” using the terms “the” or “said” may refer to any or all of the one or more components.
  • referring to “the one or more components” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ”
  • determining encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” can include receiving (e.g., receiving information) , accessing (e.g., accessing data stored in memory) and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des procédés, des systèmes et des dispositifs de communication sans fil sont décrits. Le procédé peut comprendre un premier dispositif qui transmet un premier signal à un groupe de dispositifs et qui reçoit, depuis un deuxième dispositif et sur la base de la transmission du premier signal, un deuxième signal qui indique un résultat de décodage d'un premier paquet associé à un troisième dispositif inclus dans le groupe de dispositifs et un résultat de décodage d'un deuxième paquet associé à un quatrième dispositif inclus dans le groupe de dispositifs. En outre, le procédé peut comprendre la transmission, par le premier dispositif, au troisième dispositif et au quatrième dispositif, d'un troisième paquet qui indique le résultat de décodage du premier paquet et le résultat de décodage du deuxième paquet sur la base de la réception du deuxième signal.
PCT/CN2023/108063 2023-07-19 2023-07-19 Rétroaction multi-dispositif à l'aide d'un paquet unique Pending WO2025015546A1 (fr)

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PCT/CN2023/108063 WO2025015546A1 (fr) 2023-07-19 2023-07-19 Rétroaction multi-dispositif à l'aide d'un paquet unique

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CN106576022A (zh) * 2014-08-08 2017-04-19 高通股份有限公司 在无线网络中传送反馈
US20210297199A1 (en) * 2018-09-13 2021-09-23 Apple Inc. Hybrid Automatic Repeat Request Feedback for Wireless Communication
US20230073645A1 (en) * 2020-01-31 2023-03-09 Qualcomm Incorporated Acknowledgment reporting for multi-link transmissions
US20230171035A1 (en) * 2020-07-31 2023-06-01 Huawei Technologies Co., Ltd. Data transmission method and apparatus
CN116420328A (zh) * 2020-11-11 2023-07-11 高通股份有限公司 多比特反馈信道

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106576022A (zh) * 2014-08-08 2017-04-19 高通股份有限公司 在无线网络中传送反馈
US20210297199A1 (en) * 2018-09-13 2021-09-23 Apple Inc. Hybrid Automatic Repeat Request Feedback for Wireless Communication
US20230073645A1 (en) * 2020-01-31 2023-03-09 Qualcomm Incorporated Acknowledgment reporting for multi-link transmissions
US20230171035A1 (en) * 2020-07-31 2023-06-01 Huawei Technologies Co., Ltd. Data transmission method and apparatus
CN116420328A (zh) * 2020-11-11 2023-07-11 高通股份有限公司 多比特反馈信道

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