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WO2021168767A1 - Techniques de détection de collisions entre des transmissions d'équipement utilisateur - Google Patents

Techniques de détection de collisions entre des transmissions d'équipement utilisateur Download PDF

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Publication number
WO2021168767A1
WO2021168767A1 PCT/CN2020/077079 CN2020077079W WO2021168767A1 WO 2021168767 A1 WO2021168767 A1 WO 2021168767A1 CN 2020077079 W CN2020077079 W CN 2020077079W WO 2021168767 A1 WO2021168767 A1 WO 2021168767A1
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WO
WIPO (PCT)
Prior art keywords
time interval
transmissions
transmission periodicity
identify
time intervals
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.)
Ceased
Application number
PCT/CN2020/077079
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English (en)
Inventor
Zengyu Hao
Jintao HOU
Feng Chen
Yi Qin
Hongjin GUO
Chunxia LI
Haizhou LIU
Ang Li
Xiaochen Chen
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Qualcomm Inc
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Qualcomm Inc
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Publication date
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Priority to PCT/CN2020/077079 priority Critical patent/WO2021168767A1/fr
Publication of WO2021168767A1 publication Critical patent/WO2021168767A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1215—Wireless traffic scheduling for collaboration of different radio technologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0092—Indication of how the channel is divided

Definitions

  • the following relates generally to wireless communications and more specifically to techniques for detecting collisions between transmissions of user equipment.
  • 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 or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • UE user equipment
  • Some wireless communications systems may support communications between multiple UEs (e.g., in a vehicle-to-everything (V2X) system, a vehicle-to-vehicle (V2V) system, a device-to-device (D2D) system, among other examples) .
  • V2X vehicle-to-everything
  • V2V vehicle-to-vehicle
  • D2D device-to-device
  • multiple devices may transmit in the same or similar time/frequency resources and the transmissions may collide. As such, an intended receiving device of one or all of the transmissions may not be able to properly receive and decode the transmissions.
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support techniques for detecting collisions between transmissions of user equipment (UEs) .
  • the described techniques facilitate enhanced communications between multiple devices by mitigating signal collisions of signals transmitted by nearby or neighboring devices in a system, such as a vehicle to vehicle (V2V) or vehicle to everything (V2X) communications system.
  • a first device that has a signal or message (e.g., data) to transmit may account for future transmissions of neighboring devices when identifying which resources are used for transmitting the data.
  • the first device may receive an initial transmission from a second device, where the transmission may include an indication of a transmission periodicity of the second device.
  • the transmission periodicity may indicate how frequently the second device transmits signals.
  • the first device may calculate the future resources (e.g., time resources, subframes, slots, symbols) the second device may occupy based on the received transmission periodicity and the resource in which the initial transmission was received.
  • the first device may determine one or more unoccupied resources for its own transmission and transmit during the unoccupied resources.
  • a method of wireless communication at a first UE is described.
  • the method may include receiving a message from a second UE during a first time interval, decoding the received message to identify an indication of a transmission periodicity of the second UE, identifying, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE, and transmitting data during a second time interval that is different from the one or more subsequent time intervals.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to receive a message from a second UE during a first time interval, decode the received message to identify an indication of a transmission periodicity of the second UE, identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE, and transmit data during a second time interval that is different from the one or more subsequent time intervals.
  • the apparatus may include means for receiving a message from a second UE during a first time interval, decoding the received message to identify an indication of a transmission periodicity of the second UE, identifying, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE, and transmitting data during a second time interval that is different from the one or more subsequent time intervals.
  • a non-transitory computer-readable medium storing code for wireless communication at a first UE is described.
  • the code may include instructions executable by a processor to receive a message from a second UE during a first time interval, decode the received message to identify an indication of a transmission periodicity of the second UE, identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE, and transmit data during a second time interval that is different from the one or more subsequent time intervals.
  • identifying the one or more subsequent time intervals may include operations, features, means, or instructions for identifying an index of the first time interval, and calculating an index for each time interval of the one or more subsequent time intervals based on the index of the first time interval and the transmission periodicity of the second UE.
  • the index for each time interval may be calculated based on a sum of the index of the first time interval and the transmission periodicity, where the transmission periodicity may be multiplied by a scaling factor.
  • the scaling factor includes an integer value from a set of integer values.
  • identifying the second time interval may include operations, features, means, or instructions for identifying an index of the second time interval that may be different from the index for each time interval of the one or more subsequent time intervals.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying a third time interval for transmitting the data, determining that the third time interval collides with at least one of the one or more subsequent time intervals corresponding to transmissions by the second UE, and identifying the second time interval based on the third time interval colliding with at least one of the one or more subsequent time intervals.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying the transmission periodicity of the second UE based on a value of one or more bit fields of the decoded message.
  • the first time interval includes a subframe, or a slot duration, or one or more symbol periods, or a combination thereof.
  • the first UE supports vehicle-to-everything (V2X) communications.
  • V2X vehicle-to-everything
  • FIG. 1 illustrates an example of a system for wireless communications in accordance with aspects of the present disclosure.
  • FIG. 2 illustrates an example of a system for wireless communications in accordance with aspects of the present disclosure.
  • FIG. 3 illustrates an example of a transmission timeline in accordance with aspects of the present disclosure.
  • FIG. 4 illustrates an example of a process flow in accordance with aspects of the present disclosure.
  • FIGs. 5 and 6 show block diagrams of devices in accordance with aspects of the present disclosure.
  • FIG. 7 shows a block diagram of a communications manager in accordance with aspects of the present disclosure.
  • FIG. 8 shows a diagram of a system including a device in accordance with aspects of the present disclosure.
  • FIGs. 9 and 10 show flowcharts illustrating methods in accordance with aspects of the present disclosure.
  • a wireless communications system may support both access links and sidelinks for communications between one or more communication devices.
  • An access link may refer to a communication link between a user equipment (UE) and a base station.
  • UE user equipment
  • An access link may support uplink signaling, downlink signaling, connection procedures, etc. via a Uu interface.
  • An access link may allow a device to operate in the mobile broadband licensed spectrum.
  • a sidelink may refer to any communication link between similar wireless devices (e.g., a communication link between UEs, or a backhaul communication link between base stations) . It is noted that while various examples provided herein are discussed for UE sidelink devices, such sidelink techniques may be used for any type of wireless devices that use sidelink communications.
  • a sidelink may support one or more of device-to-device (D2D) communications, vehicle-to-everything (V2X) or vehicle-to-vehicle (V2V) communications, message relaying, discovery signaling, beacon signaling, or other signals transmitted over-the-air from one UE to one or more other UEs.
  • sidelink communications may support direct communications between one or more devices via a PC5 interface. Direct communications between devices may be independent of a cellular network, where respective devices may, for example, select resources from a pool of resources without network assistance (e.g., scheduling) , as needed.
  • the transmissions in such systems may generally be periodic in nature, where each device may communicate in accordance with a transmission periodicity on time/frequency resources.
  • multiple transmitting devices may select the same resources to transmit signals. For example, two or more transmitting devices may select the same resources such that the transmission from each device may be transmitted at the same time, or on the same frequency, or both. As such, the transmissions on the same resources may collide, and the intended receiving device of one or all of the transmissions may not be able to properly receive and decode some or all of the transmissions.
  • One or more aspects of the present disclosure may support enhanced sidelink communications, such as V2E communications, where a first device that has data to transmit may account for future transmissions of neighboring devices when selecting resources.
  • the first device may receive an initial transmission from a second device during a time interval (e.g., a slot, a subframe, a symbol period) , and the received transmission may include an indication of a periodicity of the second device.
  • the transmission periodicity may indicate how frequently the second device transmits signals.
  • the first device may calculate future resources (e.g., time resources) the second device may occupy based on the received periodicity and the resource in which the initial transmission was received.
  • the first device may determine unoccupied resources and determine to transmit its own data during the unoccupied resources.
  • a first device e.g., a first UE
  • the first device may identify based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmission by the second device.
  • the first device may transmit data during a second time interval that is different from the one or more subsequent time intervals to avoid transmission collisions.
  • the described techniques may support improvements in sidelink communications by decreasing transmission collisions, and thus improving reliability, among other advantages.
  • supported techniques may include improved network operations and, in some examples, may promote network efficiencies, among other benefits.
  • aspects of the disclosure are initially described in the context of wireless communications systems. Aspects are then described with respect to a sidelink schedule 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 techniques for detecting collisions between transmissions of user equipment.
  • FIG. 1 illustrates an example of a wireless communications system 100 in accordance with aspects of the present disclosure.
  • the wireless communications system 100 may include one or more base stations 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, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-A Pro
  • NR New Radio
  • the wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.
  • ultra-reliable e.g., mission critical
  • the base stations 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may be devices in different forms or having different capabilities.
  • the base stations 105 and the UEs 115 may wirelessly communicate via one or more communication links 125.
  • Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base station 105 may establish one or more communication links 125.
  • the coverage area 110 may be an example of a geographic area over which a base station 105 and a UE 115 may support the communication of signals according to one or more 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 able to communicate with various types of devices, such as other UEs 115, the base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment) , as shown in FIG. 1.
  • network equipment e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment
  • the base stations 105 may communicate with the core network 130, or with one another, or both.
  • the base stations 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via an S1, N2, N3, or other interface) .
  • the base stations 105 may communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105) , or indirectly (e.g., via core network 130) , or both.
  • the backhaul links 120 may be or include one or more wireless links.
  • One or more of the base stations 105 described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio 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 Home NodeB, a Home eNodeB, or other suitable terminology.
  • a base transceiver station a radio base station
  • an access point a radio transceiver
  • a NodeB an eNodeB (eNB)
  • eNB eNodeB
  • a next-generation NodeB or a giga-NodeB either of which may be referred to as a gNB
  • gNB giga-NodeB
  • 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 base stations 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 base stations 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 base stations 105 may wirelessly communicate with one another via one or more communication links 125 over one or more carriers.
  • the term “carrier” may refer to a set of radio frequency 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 a radio frequency 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.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • Signal waveforms transmitted over 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 consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number 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) .
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams) , and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE 115.
  • 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 number of slots.
  • each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing.
  • Each slot may include a number 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 containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain 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., the number 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 on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on 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
  • a control region for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier.
  • One or more control regions (e.g., CORESETs) 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 a number 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 base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105.
  • the overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous network in which different types of the base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.
  • 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) or mission critical communications.
  • the UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions) .
  • Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT) , mission critical video (MCVideo) , or mission critical data (MCData) .
  • MCPTT mission critical push-to-talk
  • MCVideo mission critical video
  • MCData mission critical data
  • Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications.
  • the terms ultra-reliable, low-latency, mission critical, and ultra-reliable low-latency may be used interchangeably herein.
  • a UE 115 may also be able to communicate directly with other UEs 115 over a D2D communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol) .
  • P2P peer-to-peer
  • One or more UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105 or be otherwise unable to receive transmissions from a base station 105.
  • groups of the UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications.
  • D2D communications are carried out between the UEs 115 without the involvement of a base station 105.
  • the 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 V2X communications, V2V communications, or some combination of these.
  • 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., base stations 105) using vehicle-to-network (V2N) communications, or with both.
  • 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 base stations 105 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 the network operators IP services 150.
  • the operators IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
  • Some of the network devices may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC) .
  • Each access network entity 140 may communicate with the UEs 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs) .
  • Each access network transmission entity 145 may include one or more antenna panels.
  • various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105) .
  • the wireless communications system 100 may operate using one or more frequency bands, typically 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, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors.
  • the transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission 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 radio frequency spectrum bands.
  • the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in 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 base stations 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance.
  • operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
  • a base station 105 or 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 base station 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 base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support radio frequency 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 base station 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 at 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) .
  • transmitting devices may consider the transmission periodicities of one or more neighboring devices prior to scheduling transmissions.
  • a first device e.g., a first UE 115
  • the first device may identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmission by the second device.
  • the first device may determine which resources the second device may use for one or more future transmissions.
  • the first device may transmit data during a second time interval that is different from the one or more subsequent time intervals to avoid transmission collisions.
  • the first device may avoid those resources and select different resources for its own transmission, thus reducing or eliminating collisions and, therefore, interference in the system.
  • FIG. 2 illustrates an example of a wireless communications system 200 in accordance with aspects of the present disclosure.
  • wireless communications system 200 may implement aspects of wireless communications system 100.
  • the wireless communications system 200 may include a group of UEs 115 (e.g., UE 115-a through UE 115-c) , which may be examples of UEs 115 described with reference to FIG. 1.
  • the group of UEs 115 may communicate with each other (e.g., within a V2X system, a D2D system, and the like) via sidelink communications.
  • one or more of UEs 115-a through 115-c may be examples of a vehicle.
  • the group of UEs 115 may communicate with each other (or with another group of UEs 115) over sidelink communication links 205 (e.g., using a P2P or D2D protocol, such as a PC5 interface) .
  • a UE 115-a may monitor resource pools for the sidelink communication links 205 or indications of the sidelink communication links 205 (e.g., resource reservations, control channel transmissions, among other examples) from other UEs 115 in the group.
  • the UEs 115 may have data to transmit to one or more of the UEs 115 in the group and may use the sidelink communication links 205 to transmit the data.
  • the group of UEs 115 may utilize sidelinks (e.g., the sidelink communication links 205) in addition to access links with a base station 105.
  • one or more of the UEs 115 may be in a coverage area 110-a (e.g., a geographic coverage area 110 with reference to FIG. 1) of a base station 105.
  • a UE 115 may communicate with the base station 105 via a Uu interface (e.g., the base station may transmit downlink communications to one or more of the UEs 115 via an access link) .
  • devices e.g., UEs 115, vehicles
  • the UEs 115 may autonomously schedule sidelink transmissions, where the UEs 115 may determine one or more resources (e.g., time or frequency resources, or both) to transmit on.
  • resources e.g., time or frequency resources, or both
  • UE 115-a and UE 115-b may communicate via sidelinks 205-a and 205-b
  • UE 115-a and UE 115-c may communicate via sidelinks 205-c and 205-d
  • UE 115-b and UE 115-c may communicate via sidelinks 205-e and 205-f.
  • the UEs 115-a, 115-b, and 115-c may autonomously determine resources for such transmissions.
  • the UEs 115 may be configured with one or more resource pools for the sidelink communication links 205, where the resource pools may include the same resources that may be used by each UE 115.
  • multiple UEs 115 may schedule transmissions (e.g., aperiodic, periodic, or semi-persistent transmissions, or a combination thereof) on the same set of resources (e.g., the same subframe, slot duration, symbol period, time duration) .
  • transmissions from different UEs 115 scheduled on the same resources may collide and the intended receiving UE 115 of one or more of the transmissions may experience interference.
  • the intended receiving UE 115 may not receive the intended transmissions, or may not successfully decode the transmissions, or a combination thereof.
  • both UE 115-a and UE 115-c may select the same time/frequency resources for transmissions to UE 115-b, and the transmissions from UE 115-a and UE 115-c may collide.
  • a UE 115 that has data or messages to transmit may consider the scheduled transmissions of one or more neighboring UEs 115. For example, UE 115-a may have data to transmit in a future time duration. Prior to transmitting the data transmission, UE 115-a may receive a transmission from UE 115-b via sidelink 205-b, or receive a transmission from UE 115-c via sidelink 205-d, or a combination thereof. The transmissions from the different UEs 115 may be received at the same time, or at different times. The received transmissions may include an indication of a transmission periodicity that each UE 115 uses for transmitting.
  • UE 115-b may include an indication that UE 115-b is periodically or semi-persistently transmitting with a transmission periodicity of a time duration or a number of time intervals (e.g., 5 subframes, such that every 5 subframes, UE 115-b transmits a message) .
  • the transmission periodicities of UE 115-b and 115-c may be the same or different.
  • UE 115-a may receive the transmissions from UE 115-b or 115-c, or both, and may decode the transmissions to determine the transmission periodicities of the UE 115 that transmitted the transmission.
  • UE 115-a may use the transmission periodicity of the transmitting UE 115 and the resource (e.g., subframe) in which the transmission was received to determine subsequent resources the one or more UEs 115 will be using for a transmission.
  • UE 115-a may then schedule its own data transmissions on sidelink communications link 205-c (or another sidelink communication link 205) using un-occupied resources so as to avoid resources that may be occupied by future data transmissions from UEs 115-b or 115-c, or both.
  • each UE 115 that has an aperiodic, periodic or semi-persistent transmission to transmit may consider the periodic or semi-persistent transmissions of one or more neighboring UEs 115 before scheduling sidelink transmissions. Additionally or alternately, a receiving UE 115 with a message to transmit may consider the periodic or semi-persistent transmissions of transmitting UEs 115 if the receiving UE 115 has a high priority data transmission that the receiving UE 115 does not want to risk colliding with other transmissions. Otherwise, if the receiving UE 115 does not have a high priority transmission, the receiving UE 115 may transmit the message without considering the future transmissions of other UEs 115.
  • the receiving UE 115 may base its future transmissions on the periodic or semi-persistent transmissions of each transmitting UE 115 the receiving UE 115 receives a message from. Additionally or alternatively, the receiving UE 115 may base its future transmissions on the future transmissions of the n closest neighboring UEs 115 to the receiving UE 115, where n may be preconfigured. Additionally or alternatively, the receiving UE 115 may determine future transmissions based on the future transmissions of UEs 115 that are near the target receiving UE 115.
  • FIG. 3 illustrates an example of a transmission timeline 300 in accordance with aspects of the present disclosure.
  • transmission timeline 300 may implement aspects of wireless communications systems 100 and 200.
  • Transmission timeline 300 may be implemented by a group of UEs 115, such as the UEs 115 described with reference to FIGs. 1 and 2.
  • the transmission timeline 300 may be used for sidelink communications between one or more devices (e.g., within a V2X system, a D2D system, and the like) .
  • a UE 115 may consider the future transmissions of one or more neighboring UEs 115 prior to scheduling its own transmissions.
  • a receiving UE 115 that needs to schedule future transmissions, may receive transmissions from one or more neighboring UEs 115.
  • the received transmissions may be a-periodic or semi-persistent transmissions such that the transmissions may be transmitted more than once based on one or more parameters, such as periodicity.
  • Each received transmission may include an indication of the periodicity for which the transmitting UE 115 is using to transmit periodic or semi-persistent transmissions.
  • the receiving UE 115 may identify the transmission periodicity of one or more transmitting UEs 115 and use the transmission periodicity in conjunction with the resource in which the transmission was received to determine the resources in which future transmissions of one or more UEs 115 may occur. For example, the receiving UE 115 may determine the future subframes that a transmitting UE 115 has transmissions scheduled in. The receiving UE 115 may avoid such subframes when the receiving UE 115 starts transmitting messages. In some cases, the receiving UE 115 may perform such process prior to transmitting a-periodic, semi-persistent, or periodic transmissions.
  • the transmission periodicity may indicate how frequently the transmitting UE 115 may transmit a periodic or semi-persistent message.
  • the multiplication factor may be an integer greater than zero.
  • the multiplication factor may be determined by the receiving UE 115 based on when the receiving UE 115 may transmit a future transmission.
  • the receiving UE 115 may perform the calculation more than once with different multiplication factors to determine each subframe that will be occupied in some duration or amount of resources. For example, a receiving UE 115 may transmit a transmission sometime in the next 8 resources or time intervals (e.g., subframes, slot durations, symbol periods) , such as resources 0 through 7, as depicted with reference to FIG. 3.
  • the initial transmission 305 may include an indication of the transmitting UEs 115 transmission periodicity, where the indication may be a number of bits in an information field of the transmission.
  • the transmission periodicity may be a number of time intervals or resources, such as a number of subframes, slots, symbols, or a duration of time.
  • the receiving UE 115 may determine the transmission periodicity based on the indication in initial transmission 305. As depicted in FIG. 3, the transmission periodicity may be 2 resources, such as 2 subframes.
  • the receiving UE 115 may determine that within the 8 resources, resources 1, 3, 5, and 7 are unoccupied resources 315. As such, the receiving UE 115 may schedule future transmissions (e.g., aperiodic, periodic, semi-persistent) in the unoccupied resources 315 to mitigate transmission collisions transmitted by multiple UEs 115. In some cases, the receiving UE 115 may determine a transmission periodicity, or an initial resource to start transmissions transmitted by the receiving UE 115, or a combination thereof.
  • future transmissions e.g., aperiodic, periodic, semi-persistent
  • FIG. 4 illustrates an example of a process flow 400 in accordance with aspects of the present disclosure.
  • the process flow 400 may illustrate an example sidelink communications scheme.
  • UE 115-g and 115-h may perform a sidelink communications scheme to mitigate sidelink transmission collisions.
  • UEs 115-g, and 115-h may be examples of the corresponding wireless devices described with reference to FIGs. 1 and 2.
  • UE 115-g may be an example of a first UE 115 and UE 115-h may be an example of a second UE 115.
  • UEs 115 may refer to wireless communications devices, such as cellphones, vehicles, tablets, etc.
  • Alternative examples of the following may be implemented, where some steps are performed in a different order than described or are not performed at all. In some cases, steps may include additional features not mentioned below, or further steps may be added.
  • UE 115-g may receive a message from UE 115-h during a first time interval.
  • the message may be received via a sidelink.
  • the transmission may be transmitted via V2X communications, where UE 115-g or UE 115-h or both support V2X communications.
  • the first time interval includes subframe, or a slot duration, or one or more symbol periods, or a combination thereof.
  • UE 115-g may decode the received message to identify an indication of a transmission periodicity of UE 115-h. In some cases, UE 115-g may identify the transmission periodicity of UE 115-h based on a value of one or more bit fields of the decoded message.
  • UE 115-g may identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by UE 115-h.
  • identifying the one or more subsequent time intervals includes identifying an index of the first time interval, and calculating an index for each time interval of the one or more subsequent time intervals based on the index of the first time interval and the transmission periodicity of UE 115-h.
  • the index for each time interval is calculated based on a sum of the index of the first time interval and the transmission periodicity, where the transmission periodicity is multiplied by a scaling factor.
  • the scaling factor includes an integer value from a set of integer values.
  • UE 115-h may identifying a third time interval for transmitting the data, determine that the third time interval collides with at least one of the one or more subsequent time intervals corresponding to transmissions by UE 115-h, and identify the second time interval based on the third time interval colliding with at least one of the one or more subsequent time intervals.
  • UE 115-g may transmit data during a second time interval that is different from the one or more subsequent time intervals. In some cases, transmitting in the second time interval that is different from the one or more subsequent time intervals may mitigate transmission collisions by neighboring UEs 115.
  • FIG. 5 shows a block diagram 500 of a device 505 in accordance with aspects of the present disclosure.
  • the device 505 may be an example of aspects of a UE 115 as described herein.
  • the device 505 may include a receiver 510, a communications manager 515, and a transmitter 520.
  • the device 505 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques for detecting collisions between transmissions of user equipment, etc. ) . Information may be passed on to other components of the device 505.
  • the receiver 510 may be an example of aspects of the transceiver 820 described with reference to FIG. 8.
  • the receiver 510 may utilize a single antenna or a set of antennas.
  • the communications manager 515 may receive a message from a second UE during a first time interval, decode the received message to identify an indication of a transmission periodicity of the second UE, identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE, and transmit data during a second time interval that is different from the one or more subsequent time intervals.
  • the communications manager 515 may be an example of aspects of the communications manager 810 described herein.
  • the communications manager 515 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 515, or its sub-components may be executed by a general-purpose processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • the communications manager 515 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 515, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 515, or its sub-components may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • the transmitter 520 may transmit signals generated by other components of the device 505.
  • the transmitter 520 may be collocated with a receiver 510 in a transceiver module.
  • the transmitter 520 may be an example of aspects of the transceiver 820 described with reference to FIG. 8.
  • the transmitter 520 may utilize a single antenna or a set of antennas.
  • the communications manager 515 as described herein may be implemented to realize one or more potential advantages.
  • One implementation may allow the device 505 to more reliably coordinate sidelink communications, and more specifically to consider the sidelink transmissions of one or more neighboring devices to mitigate transmission collisions and interference.
  • the device 505 may identify future transmissions by a neighboring device and device 5050 may avoid transmitting in similar resources.
  • a processor of a UE 115 may increase reliability and decrease signaling overhead in sidelink communications, such as in V2X communications, because transmission collisions may be mitigated.
  • FIG. 6 shows a block diagram 600 of a device 605 in accordance with aspects of the present disclosure.
  • the device 605 may be an example of aspects of a device 505, or a UE 115 as described herein.
  • the device 605 may include a receiver 610, a communications manager 615, and a transmitter 640.
  • the device 605 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques for detecting collisions between transmissions of user equipment, etc. ) . Information may be passed on to other components of the device 605.
  • the receiver 610 may be an example of aspects of the transceiver 820 described with reference to FIG. 8.
  • the receiver 610 may utilize a single antenna or a set of antennas.
  • the communications manager 615 may be an example of aspects of the communications manager 515 as described herein.
  • the communications manager 615 may include a message reception manager 620, a transmission periodicity manager 625, a time interval manager 630, and a first UE transmission manager 635.
  • the communications manager 615 may be an example of aspects of the communications manager 810 described herein.
  • the message reception manager 620 may receive a message from a second UE during a first time interval.
  • the transmission periodicity manager 625 may decode the received message to identify an indication of a transmission periodicity of the second UE.
  • the time interval manager 630 may identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE.
  • the first UE transmission manager 635 may transmit data during a second time interval that is different from the one or more subsequent time intervals.
  • the transmitter 640 may transmit signals generated by other components of the device 605.
  • the transmitter 640 may be collocated with a receiver 610 in a transceiver module.
  • the transmitter 640 may be an example of aspects of the transceiver 820 described with reference to FIG. 8.
  • the transmitter 640 may utilize a single antenna or a set of antennas.
  • FIG. 7 shows a block diagram 700 of a communications manager 705 in accordance with aspects of the present disclosure.
  • the communications manager 705 may be an example of aspects of a communications manager 515, a communications manager 615, or a communications manager 810 described herein.
  • the communications manager 705 may include a message reception manager 710, a transmission periodicity manager 715, a time interval manager 720, a first UE transmission manager 725, and an interval collision component 730. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the message reception manager 710 may receive a message from a second UE during a first time interval.
  • the transmission periodicity manager 715 may decode the received message to identify an indication of a transmission periodicity of the second UE.
  • the transmission periodicity manager 715 may identify the transmission periodicity of the second UE based on a value of one or more bit fields of the decoded message.
  • the time interval manager 720 may identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE. In some examples, the time interval manager 720 may identify an index of the first time interval. In some examples, the time interval manager 720 may calculate an index for each time interval of the one or more subsequent time intervals based on the index of the first time interval and the transmission periodicity of the second UE. In some examples, the time interval manager 720 may identify an index of the second time interval that is different from the index for each time interval of the one or more subsequent time intervals.
  • the time interval manager 720 may identify a third time interval for transmitting the data. In some examples, the time interval manager 720 may identify the second time interval based on the third time interval colliding with at least one of the one or more subsequent time intervals. In some cases, the index for each time interval is calculated based on a sum of the index of the first time interval and the transmission periodicity, where the transmission periodicity is multiplied by a scaling factor. In some cases, the scaling factor includes an integer value from a set of integer values. In some cases, the first time interval includes a subframe, or a slot duration, or one or more symbol periods, or a combination thereof.
  • the first UE transmission manager 725 may transmit data during a second time interval that is different from the one or more subsequent time intervals. In some cases, the first UE supports V2X communications.
  • the interval collision component 730 may determine that the third time interval collides with at least one of the one or more subsequent time intervals corresponding to transmissions by the second UE.
  • FIG. 8 shows a diagram of a system 800 including a device 805 in accordance with aspects of the present disclosure.
  • the device 805 may be an example of or include the components of device 505, device 605, or a UE 115 as described herein.
  • the device 805 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 810, an I/O controller 815, a transceiver 820, an antenna 825, memory 830, and a processor 840. These components may be in electronic communication via one or more buses (e.g., bus 845) .
  • buses e.g., bus 845
  • the communications manager 810 may receive a message from a second UE during a first time interval, decode the received message to identify an indication of a transmission periodicity of the second UE, identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE, and transmit data during a second time interval that is different from the one or more subsequent time intervals.
  • the I/O controller 815 may manage input and output signals for the device 805.
  • the I/O controller 815 may also manage peripherals not integrated into the device 805.
  • the I/O controller 815 may represent a physical connection or port to an external peripheral.
  • the I/O controller 815 may utilize an operating system such as or another known operating system.
  • the I/O controller 815 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 815 may be implemented as part of a processor.
  • a user may interact with the device 805 via the I/O controller 815 or via hardware components controlled by the I/O controller 815.
  • the transceiver 820 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described herein.
  • the transceiver 820 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 820 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 825. However, in some cases the device may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 830 may include random-access memory (RAM) and read-only memory (ROM) .
  • the memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed, cause the processor to perform various functions described herein.
  • the memory 830 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 processor 840 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 processor 840 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 840.
  • the processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks supporting techniques for detecting collisions between transmissions of user equipment) .
  • the code 835 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 835 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory.
  • the code 835 may not be directly executable by the processor 840 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 9 shows a flowchart illustrating a method 900 that supports techniques for detecting collisions between transmissions of user equipment in accordance with aspects of the present disclosure.
  • the operations of method 900 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 900 may be performed by a communications manager as described with reference to FIGs. 5 through 8.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described herein.
  • a UE may perform aspects of the functions described herein using special-purpose hardware.
  • the UE may receive a message from a second UE during a first time interval.
  • the operations of 905 may be performed according to the methods described herein. In some examples, aspects of the operations of 905 may be performed by a message reception manager as described with reference to FIGs. 5 through 8.
  • the UE may decode the received message to identify an indication of a transmission periodicity of the second UE.
  • the operations of 910 may be performed according to the methods described herein. In some examples, aspects of the operations of 910 may be performed by a transmission periodicity manager as described with reference to FIGs. 5 through 8.
  • the UE may identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE.
  • the operations of 915 may be performed according to the methods described herein. In some examples, aspects of the operations of 915 may be performed by a time interval manager as described with reference to FIGs. 5 through 8.
  • the UE may transmit data during a second time interval that is different from the one or more subsequent time intervals.
  • the operations of 920 may be performed according to the methods described herein. In some examples, aspects of the operations of 920 may be performed by a first UE transmission manager as described with reference to FIGs. 5 through 8.
  • FIG. 10 shows a flowchart illustrating a method 1000 that supports techniques for detecting collisions between transmissions of user equipment in accordance with aspects of the present disclosure.
  • the operations of method 1000 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1000 may be performed by a communications manager as described with reference to FIGs. 5 through 8.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described herein.
  • a UE may perform aspects of the functions described herein using special-purpose hardware.
  • the UE may receive a message from a second UE during a first time interval.
  • the operations of 1005 may be performed according to the methods described herein. In some examples, aspects of the operations of 1005 may be performed by a message reception manager as described with reference to FIGs. 5 through 8.
  • the UE may decode the received message to identify an indication of a transmission periodicity of the second UE.
  • the operations of 1010 may be performed according to the methods described herein. In some examples, aspects of the operations of 1010 may be performed by a transmission periodicity manager as described with reference to FIGs. 5 through 8.
  • the UE may identify, based on the first time interval and the transmission periodicity, one or more subsequent time intervals corresponding to transmissions by the second UE.
  • the operations of 1015 may be performed according to the methods described herein. In some examples, aspects of the operations of 1015 may be performed by a time interval manager as described with reference to FIGs. 5 through 8.
  • the UE may identify a third time interval for transmitting the data.
  • the operations of 1020 may be performed according to the methods described herein. In some examples, aspects of the operations of 1020 may be performed by a time interval manager as described with reference to FIGs. 5 through 8.
  • the UE may determine that the third time interval collides with at least one of the one or more subsequent time intervals corresponding to transmissions by the second UE.
  • the operations of 1025 may be performed according to the methods described herein. In some examples, aspects of the operations of 1025 may be performed by an interval collision component as described with reference to FIGs. 5 through 8.
  • the UE may identify the second time interval based on the third time interval colliding with at least one of the one or more subsequent time intervals.
  • the operations of 1030 may be performed according to the methods described herein. In some examples, aspects of the operations of 1030 may be performed by a time interval manager as described with reference to FIGs. 5 through 8.
  • the UE may transmit data during a second time interval that is different from the one or more subsequent time intervals.
  • the operations of 1035 may be performed according to the methods described herein. In some examples, aspects of the operations of 1035 may be performed by a first UE transmission manager as described with reference to FIGs. 5 through 8.
  • 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) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on 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 place 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 where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

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  • Mobile Radio Communication Systems (AREA)

Abstract

Des procédés, des systèmes, et des dispositifs destinés aux communications sans fil sont décrits. Des dispositifs de transmission peuvent prendre en considération les périodicités de transmission d'un ou de plusieurs dispositifs voisins avant la transmission. Par exemple, un premier dispositif (par exemple, un premier équipement utilisateur (UE)) peut recevoir un message provenant d'un second dispositif (par exemple, un second UE) pendant un premier intervalle de temps, le message pouvant indiquer une périodicité de transmission du second dispositif. Le premier dispositif peut identifier sur la base du premier intervalle de temps et de la périodicité de transmission, un ou plusieurs intervalles de temps ultérieurs correspondant aux transmissions par le second dispositif. Le premier dispositif peut identifier un second intervalle de temps sur la base du ou des intervalles de temps ultérieurs pendant lesquels le premier dispositif peut transmettre. Le premier dispositif peut transmettre des données pendant le second intervalle de temps qui est différent du ou des intervalles de temps ultérieurs pour éviter des collisions de transmission.
PCT/CN2020/077079 2020-02-28 2020-02-28 Techniques de détection de collisions entre des transmissions d'équipement utilisateur Ceased WO2021168767A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023044219A1 (fr) * 2021-09-16 2023-03-23 Qualcomm Incorporated Techniques pour transmissions semi-statiques en duplex intégral par liaison latérale
CN116389406A (zh) * 2023-06-05 2023-07-04 上海星思半导体有限责任公司 Ue id的确定方法、ue id范围的发送方法、装置及处理器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106162556A (zh) * 2015-03-26 2016-11-23 电信科学技术研究院 一种通信方法及装置
CN106558210A (zh) * 2015-09-25 2017-04-05 中兴通讯股份有限公司 车联网信息传输方法及装置
WO2017116108A1 (fr) * 2015-12-28 2017-07-06 Samsung Electronics Co., Ltd. Procédés et appareil pour l'évitement de collisions entre ressources dans une communication de dispositif à dispositif
WO2019066629A1 (fr) * 2017-09-29 2019-04-04 엘지전자 주식회사 Procédé de transmission d'un message v2x effectué par un terminal dans un système de communication sans fil, et terminal mettant en œuvre ce procédé
WO2019083343A1 (fr) * 2017-10-27 2019-05-02 엘지전자 주식회사 Procédé permettant à un terminal de recevoir un signal de liaison latérale dans un système de communication sans fil prenant en charge une liaison latérale, et dispositif associé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106162556A (zh) * 2015-03-26 2016-11-23 电信科学技术研究院 一种通信方法及装置
CN106558210A (zh) * 2015-09-25 2017-04-05 中兴通讯股份有限公司 车联网信息传输方法及装置
WO2017116108A1 (fr) * 2015-12-28 2017-07-06 Samsung Electronics Co., Ltd. Procédés et appareil pour l'évitement de collisions entre ressources dans une communication de dispositif à dispositif
WO2019066629A1 (fr) * 2017-09-29 2019-04-04 엘지전자 주식회사 Procédé de transmission d'un message v2x effectué par un terminal dans un système de communication sans fil, et terminal mettant en œuvre ce procédé
WO2019083343A1 (fr) * 2017-10-27 2019-05-02 엘지전자 주식회사 Procédé permettant à un terminal de recevoir un signal de liaison latérale dans un système de communication sans fil prenant en charge une liaison latérale, et dispositif associé

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
INTEL CORPORATION: "Discussion on Resource Reselection Triggers for V2V Communication", 3GPP DRAFT; R1-164138 INTEL - V2V TRIGGERING, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Nanjing, China; 20160523 - 20160527, 14 May 2016 (2016-05-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051096576 *
INTEL CORPORATION: "Discussion on sensing aspects to support V2V communication with different transmission periodicity", 3GPP DRAFT; R1-165073 INTEL - V2V PERIOD, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Nanjing, China; 20160523 - 20160527, 14 May 2016 (2016-05-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051096283 *
INTEL CORPORATION: "Scheduling Assignment for Sidelink V2V Communication", 3GPP DRAFT; R1-164141 INTEL - V2V SCI, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Nanjing, China; 20160523 - 20160527, 14 May 2016 (2016-05-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051096573 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023044219A1 (fr) * 2021-09-16 2023-03-23 Qualcomm Incorporated Techniques pour transmissions semi-statiques en duplex intégral par liaison latérale
US12127198B2 (en) 2021-09-16 2024-10-22 Qualcomm Incorporated Techniques for sidelink full-duplex semi-static transmissions
CN116389406A (zh) * 2023-06-05 2023-07-04 上海星思半导体有限责任公司 Ue id的确定方法、ue id范围的发送方法、装置及处理器
CN116389406B (zh) * 2023-06-05 2023-08-15 上海星思半导体有限责任公司 Ue id的确定方法、ue id范围的发送方法、装置及处理器

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