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WO2020061722A1 - Conception de signalisation de répétition d'informations de commande - Google Patents

Conception de signalisation de répétition d'informations de commande Download PDF

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Publication number
WO2020061722A1
WO2020061722A1 PCT/CN2018/107176 CN2018107176W WO2020061722A1 WO 2020061722 A1 WO2020061722 A1 WO 2020061722A1 CN 2018107176 W CN2018107176 W CN 2018107176W WO 2020061722 A1 WO2020061722 A1 WO 2020061722A1
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WO
WIPO (PCT)
Prior art keywords
search space
hypothesis
repetition
decoding
control information
Prior art date
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Ceased
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PCT/CN2018/107176
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English (en)
Inventor
Liangming WU
Changlong Xu
Jian Li
Kai Chen
Jing Jiang
Seyedkianoush HOSSEINI
Hao Xu
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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/CN2018/107176 priority Critical patent/WO2020061722A1/fr
Publication of WO2020061722A1 publication Critical patent/WO2020061722A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]

Definitions

  • the following relates generally to wireless communications, and more specifically to control information repetition signaling design.
  • 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 a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • UE user equipment
  • a base station and a user equipment may operate in a low latency wireless communications system.
  • the low latency wireless communications system may set reliability and latency specifications for transmissions within the system (e.g., latency of no more than 1 millisecond and a packet error rate that does not exceed a threshold) .
  • failing to receive control information may delay when the UE receives or transmits a scheduled transmission, and may cause the UE to fail to meet the reliability and latency specifications of the system.
  • Conventional techniques for control information reception at the UE can be improved.
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support control channel repetition signaling design.
  • the described techniques provide for configuring a user equipment (UE) with hypothesis pairs within respective search spaces in which to search for repeated control information.
  • a base station and the UE may operate in a low latency wireless communications system that has reliability and latency specifications for communications within the system. To meet the latency and reliability specifications, the base station may repeat transmission of control information in multiple search spaces to increase the likelihood that the UE is able to receive and successfully decode the control information.
  • the base station may configure a first search space for an initial transmission of the control information and configure a second search space for a repetition of the same control information.
  • the base station may transmit control information in the first search space and transmit a copy of the control information in the second search space. This may give the UE more opportunities to receive and successfully decode the control information.
  • the base station may transmit a configuration to the UE that indicates which pairs of hypotheses in the respective search spaces that support control channel repetition for each aggregation level.
  • the configuration information may indicate, for each hypothesis pair, a hypothesis from the first search space and a hypothesis from a second search space that may contain repeated control information.
  • the UE may attempt to decode the hypotheses for each hypothesis pair searching for repeated control information and may skip performing blind decodes of other portions of the respective search spaces. This may reduce the total number of blind decodings the UE performs when looking for repeated control information.
  • the configuration information may include how many decoding hypotheses per aggregation level are configured for control channel repetition. In some cases, the configuration information may explicitly indicate which decoding hypotheses are configured for control channel repetition. In some cases, the configuration information may indicate which decoding hypotheses make up a hypothesis pair.
  • the base station and the UE may also implement techniques to improve channel estimation across search spaces carrying repeated control information.
  • the control channel may be jointly estimated based on pilots transmitted within the respective search spaces.
  • the search spaces may have the same frequency allocation or at least a partial overlap in the frequency domain.
  • the base station may apply a same precoder (e.g., open- loop precoder cycling) to resource blocks transmitted within the overlapped frequency.
  • the search spaces may be configured to have the same precoder by default.
  • the precoder being used may be configured by signaling (e.g., higher layer signaling or semi-persistent scheduling) by the base station to the UE.
  • a method of wireless communication by a UE may include receiving configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space, identifying a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, monitoring the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs, and decoding, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • the apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to receive configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space, identify a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, monitor the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs, and decode, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • the apparatus may include means for receiving configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space, identifying a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, monitoring the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs, and decoding, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • a non-transitory computer-readable medium storing code for wireless communication by a UE is described.
  • the code may include instructions executable by a processor to receive configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space, identify a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, monitor the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs, and decode, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • receiving the configuration information further may include operations, features, means, or instructions for receiving the configuration information that indicates a first subset of a first set of decoding hypotheses in the first search space support repetition and a second subset of a second set of decoding hypotheses in the second search space support repetition, where identifying of the set of repetition hypothesis pairs may be based on the first subset and the second subset.
  • receiving the configuration information further may include operations, features, means, or instructions for receiving the configuration information that includes a bitmap that indicates a subset of a first set of decoding hypotheses in the first search space support repetition and a subset of a second set of decoding hypotheses in the second search space support repetition, where identifying of the set of repetition hypothesis pairs may be based on the bitmap.
  • receiving the configuration information further may include operations, features, means, or instructions for receiving the configuration information that indicates the first decoding hypothesis in the first search space and the second decoding hypothesis in the second search space for each repetition hypothesis pair of the set of repetition hypothesis pairs.
  • the set of repetition hypothesis pairs may be a subset of repetition hypothesis pairs available between the first search space and the second search space.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for jointly estimating a channel of the first search space and of the second search space to generate a joint channel estimate based on a first pilot tone within the first search space and a second pilot tone within the second search space, where the decoding of the control information may be based on the joint channel estimate.
  • the first search space at least partially overlaps in frequency with the second search space.
  • the first decoding hypothesis may have a same aggregation level as the second decoding hypothesis.
  • the first decoding hypothesis may have a different aggregation level than the second decoding hypothesis.
  • the first decoding hypothesis may have a larger aggregation level than the second decoding hypothesis.
  • the first decoding hypothesis may have a same aggregation level as a combination of an aggregation level of the second decoding hypothesis with an aggregation level of a third decoding hypothesis of the second search space.
  • a method of wireless communication by a base station may include identifying a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, transmitting configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs, and transmitting, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • the apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to identify a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, transmit configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs, and transmit, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • the apparatus may include means for identifying a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, transmitting configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs, and transmitting, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • a non-transitory computer-readable medium storing code for wireless communication by a base station is described.
  • the code may include instructions executable by a processor to identify a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, transmit configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs, and transmit, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • transmitting the configuration information further may include operations, features, means, or instructions for transmitting the configuration information that includes a bitmap that indicates a subset of a first set of decoding hypotheses in the first search space support repetition and a subset of a second set of decoding hypotheses in the second search space support repetition.
  • transmitting the configuration information further may include operations, features, means, or instructions for transmitting the configuration information that indicates the first decoding hypothesis in the first search space and the second decoding hypothesis in the second search space for each repetition hypothesis pair of the set of repetition hypothesis pairs.
  • the set of repetition hypothesis pairs may be a subset of repetition hypothesis pairs available between the first search space and the second search space.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a first pilot tone within the first search space and a second pilot tone within the second search space.
  • the first search space at least partially overlaps in frequency with the second search space.
  • transmitting, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space further may include operations, features, means, or instructions for applying a same precoding to at least one resource block within which the first search space at least partially overlaps in frequency with the second search space.
  • the first decoding hypothesis may have a same aggregation level as the second decoding hypothesis.
  • the first decoding hypothesis may have a different aggregation level than the second decoding hypothesis.
  • the first decoding hypothesis may have a larger aggregation level than the second decoding hypothesis.
  • the first decoding hypothesis may have a same aggregation level as a combination of an aggregation level of the second decoding hypothesis with an aggregation level of a third decoding hypothesis of the second search space.
  • FIG. 1 illustrates an example of a system for wireless communications that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIG. 2 illustrates an example of a wireless communications system that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIGs. 3 through 6 illustrate examples of search space repetition indications that support control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIG. 7 illustrates an example of a repetition search space configuration that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIG. 8 illustrates an example of a process flow that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIGs. 9 and 10 show block diagrams of devices that support control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIG. 11 shows a block diagram of a communications manager that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIG. 12 shows a diagram of a system including a device that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIGs. 13 and 14 show block diagrams of devices that support control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIG. 15 shows a block diagram of a communications manager that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIG. 16 shows a diagram of a system including a device that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • FIGs. 17 through 20 show flowcharts illustrating methods that support control information repetition signaling design in accordance with aspects of the present disclosure.
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support control channel repetition signaling design.
  • the described techniques provide for configuring a user equipment (UE) with hypothesis pairs within respective search spaces in which to search for repeated control information.
  • the base station may transmit a configuration to the UE to indicate which pairs of hypotheses in the respective search spaces support control channel repetition, and beneficially may reduce the total number of blind decodings the UE performs when looking for repeated control information.
  • a base station and a user equipment may operate in a low latency wireless communications system that provides reliability and latency specifications for communication within the system (e.g., latency of no more than 1 millisecond and a packet error rate that does not exceeds a threshold) .
  • reliability and latency specifications for communication within the system (e.g., latency of no more than 1 millisecond and a packet error rate that does not exceeds a threshold) .
  • meeting the latency and reliability specifications may depend on the ability of the UE to successfully receive the control information. Therefore, the UE and the base station may implement techniques to improve control channel reception performance at the UE.
  • the base station may transmit repetitions of the control information to improve the control channel receive performance.
  • the base station may configure a first search space and a second search space for the control channel repetition.
  • a search space may be, for example, within a control resource set configured by the base station in which the base station transmits to the UE.
  • the base station may transmit control information in the first search space and a copy of the control information in the second search space. This may give the UE more opportunities to receive the control information.
  • the UE may blindly decode in the configured search spaces to detect and receive the control channel signaling.
  • the UE may perform multiple blind decodings at different decoding candidates or decoding hypotheses, where the base station may have transmitted the control information. If blind detection is used for both the regular search space and repeated search spaces, the UE may perform a large number of blind decodings. For example, if the first search space has M decoding hypotheses and the second search space has N decoding hypotheses, UE may perform up to M*N blind detections when attempting to receive the repeated control information. Generally, the more blind decodings performed at the receiver, the more complex the decoding process. Therefore, to reduce complexity, a UE and base station described herein may implement a signaling mechanism to reduce a number of blind decodings performed at the UE.
  • the base station may transmit a configuration to the UE which indicates pairs of hypotheses that support control channel repetition for each aggregation level.
  • the UE may identify, for each hypothesis pair, a hypothesis from the first search space and a hypothesis from the second search space based on the configuration information.
  • the same control information may be transmitted in both hypotheses of a hypothesis pair, and the UE may decode the respective search spaces searching for control information in the first search space that is repeated in the second search space.
  • Configuring the UE with a set of one or more hypothesis pairs may reduce the total number of blind decodings the UE performs when looking for repeated control information, as the UE may skip decoding other portions of the respective search spaces that are not indicated in the configuration information.
  • the UE may monitor the first and second search spaces for the repeated control information based on the hypothesis pairs.
  • the configuration information may include how many decoding hypotheses per aggregation level are configured for control channel repetition. In some cases, the configuration information may explicitly indicate which decoding hypotheses are configured for control channel repetition. In some cases, the configuration information may indicate which decoding hypotheses in the respective search spaces make up a hypothesis pair. For example, the base station may transmit a bitmap which indicates which hypothesis from each aggregation level of a search space are configured for control channel repetition. In some cases, the base station may indicate a hypothesis pair including a hypothesis from the first search space and a hypothesis from the second search space.
  • the base station and the UE may also implement techniques to improve channel estimation across search spaces carrying repeated control information.
  • the control channel may be jointly estimated based on pilots of the search spaces.
  • the search spaces may have the same frequency allocation or at least a partial overlap in the frequency domain.
  • the base station may apply the same precoder (e.g., open-loop precoder cycling) to the resource blocks in the overlapped frequency.
  • the search spaces or control resource sets may be configured to have the same precoder by default.
  • the precoders may be configured by signaling (e.g., higher layer signaling or semi-persistent scheduling) .
  • aspects of the disclosure are initially described in the context of a wireless communications system. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to control information repetition signaling design.
  • FIG. 1 illustrates an example of a wireless communications system 100 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the wireless communications system 100 includes base stations 105, 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
  • wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low-cost and low-complexity devices.
  • ultra-reliable e.g., mission critical
  • Base stations 105 may wirelessly communicate with UEs 115 via one or more base station antennas.
  • Base stations 105 described herein may include or may be referred to by those skilled 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 Node B or giga-nodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or some other suitable terminology.
  • Wireless communications system 100 may include base stations 105 of different types (e.g., macro or small cell base stations) .
  • the UEs 115 described herein may be able to communicate with various types of base stations 105 and network equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like.
  • Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 is supported. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via communication links 125, and communication links 125 between a base station 105 and a UE 115 may utilize one or more carriers. Communication links 125 shown in wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Downlink transmissions may also be called forward link transmissions while uplink transmissions may also be called reverse link transmissions.
  • the geographic coverage area 110 for a base station 105 may be divided into sectors making up only a portion of the geographic coverage area 110, and each sector may be associated with a cell.
  • each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations thereof.
  • 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, and overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.
  • the term “cell” refers to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) , and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) ) operating via the same or a different carrier.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., machine-type communication (MTC) , narrowband Internet-of-Things (NB-IoT) , enhanced mobile broadband (eMBB) , or others) that may provide access for different types of devices.
  • MTC machine-type communication
  • NB-IoT narrowband Internet-of-Things
  • eMBB enhanced mobile broadband
  • the term “cell” may refer to a portion of a geographic coverage area 110 (e.g., a sector) over which the logical entity operates.
  • UEs 115 may be dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile.
  • a UE 115 may also 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.
  • a UE 115 may also be 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 also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, or the like, which may be implemented in various articles such as appliances, vehicles, meters, or the like.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC massive machine type communications
  • 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 base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application program that can make use of the information or present the information to humans interacting with the program or application.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines. 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.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) . In some examples half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power saving “deep sleep” mode when not engaging in active communications, or operating over a limited bandwidth (e.g., according to narrowband communications) . In some cases, UEs 115 may be designed to support critical functions (e.g., mission critical functions) , and a wireless communications system 100 may be configured to provide ultra-reliable communications for these functions.
  • critical functions e.g., mission critical functions
  • a UE 115 may also be able to communicate directly with other UEs 115 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol) .
  • P2P peer-to-peer
  • D2D device-to-device
  • One or more of a group of 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 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 UEs 115 without the involvement of a base
  • Base stations 105 may communicate with the core network 130 and with one another.
  • base stations 105 may interface with the core network 130 through backhaul links 132 (e.g., via an S1, N2, N3, or other interface) .
  • Base stations 105 may communicate with one another over backhaul links 134 (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) .
  • 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) , which may include at least one mobility management entity (MME) , at least one serving gateway (S-GW) , and at least one Packet Data Network (PDN) gateway (P-GW) .
  • the MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC.
  • User IP packets may be transferred through the S-GW, which itself may be connected to the P-GW.
  • the P-GW may provide IP address allocation as well as other functions.
  • the P-GW may be connected to the network operators IP services.
  • the operators IP services may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched (PS) Stream
  • At least some of the network devices may include subcomponents such as an access network entity, which may be an example of an access node controller (ANC) .
  • Each access network entity may communicate with UEs 115 through a number of other access network transmission entities, which may be referred to as a radio head, a smart radio head, or a transmission/reception point (TRP) .
  • TRP transmission/reception point
  • various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station 105) .
  • Wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 MHz to 300 GHz.
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features. However, the waves may penetrate structures sufficiently for a macro cell to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter range (e.g., less than 100 km) 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
  • Wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band.
  • SHF region includes bands such as the 5 GHz industrial, scientific, and medical (ISM) bands, which may be used opportunistically by devices that can tolerate interference from other users.
  • ISM bands 5 GHz industrial, scientific, and medical bands
  • Wireless communications system 100 may also operate in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band.
  • EHF extremely high frequency
  • wireless communications system 100 may support millimeter wave (mmW) communications between UEs 115 and base stations 105, and EHF antennas of the respective devices may be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate use of antenna arrays within a UE 115.
  • mmW millimeter wave
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. Techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • 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 ISM band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz ISM band.
  • wireless devices such as base stations 105 and UEs 115 may employ listen-before-talk (LBT) procedures to ensure a frequency channel is clear before transmitting data.
  • LBT listen-before-talk
  • operations in unlicensed bands may be based on a CA configuration in conjunction with CCs operating in a licensed band (e.g., LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these.
  • Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD) , time division duplexing (TDD) , or a combination of both.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • base station 105 or 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.
  • wireless communications system 100 may use a transmission scheme between a transmitting device (e.g., a base station 105) and a receiving device (e.g., a UE 115) , where the transmitting device is equipped with multiple antennas and the receiving devices are equipped with one or more antennas.
  • MIMO communications may employ multipath signal propagation to increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream, and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams.
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • MU-MIMO multiple-user MIMO
  • 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 or a UE 115) to shape or steer an antenna beam (e.g., a transmit beam or 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 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 certain amplitude and phase offsets to signals carried via each of 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) .
  • a base station 105 may use multiple antennas or antenna arrays to conduct beamforming operations for directional communications with a UE 115. For instance, some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station 105 multiple times in different directions, which may include a signal being transmitted according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105.
  • some signals e.g., synchronization signals, reference signals, beam selection signals, or other control signals
  • Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105.
  • Some signals may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115) .
  • the beam direction associated with transmissions along a single beam direction may be determined based at least in in part on a signal that was transmitted in different beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions, and the UE 115 may report to the base station 105 an indication of the signal it received with a highest signal quality, or an otherwise acceptable signal quality.
  • a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) , or transmitting a signal in a single direction (e.g., for transmitting data to a receiving device) .
  • a receiving device may try multiple receive beams when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive beams or receive directions.
  • a receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal) .
  • the single receive beam may be aligned in a beam direction determined based at least in part on listening according to different receive beam directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio, or otherwise acceptable signal quality based at least in part on listening according to multiple beam directions) .
  • the antennas of a base station 105 or UE 115 may be located within one or more antenna arrays, 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.
  • wireless communications system 100 may be a packet-based network that operate according to a layered protocol stack.
  • PDCP Packet Data Convergence Protocol
  • a Radio Link Control (RLC) layer may in some cases perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer to improve link efficiency.
  • HARQ hybrid automatic repeat request
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • PHY Physical
  • UEs 115 and base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • HARQ feedback is one technique of increasing the likelihood that data is received correctly over a communication link 125.
  • 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., signal-to-noise conditions) .
  • a wireless device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • the radio frames may be identified by a system frame number (SFN) ranging from 0 to 1023.
  • SFN system frame number
  • Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms.
  • a subframe may be further divided into 2 slots each having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods.
  • a subframe may be the smallest scheduling unit of the wireless communications system 100, and may be referred to as a transmission time interval (TTI) .
  • TTI transmission time interval
  • a smallest scheduling unit of the wireless communications system 100 may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) or in selected component carriers using sTTIs) .
  • a slot may further be divided into multiple mini-slots containing one or more symbols.
  • a symbol of a mini-slot or a mini-slot may be the smallest unit of scheduling.
  • Each symbol may vary in duration depending on the subcarrier spacing or frequency band of operation, for example.
  • some wireless communications systems may implement slot aggregation in which multiple slots or mini-slots are aggregated together and used for communication between a UE 115 and a base station 105.
  • carrier refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over a communication link 125.
  • a carrier of a communication link 125 may include a portion of a radio frequency spectrum band that is operated according to physical layer channels for a given radio access technology.
  • Each physical layer channel may carry user data, control information, or other signaling.
  • a carrier may be associated with a pre-defined frequency channel (e.g., an E-UTRA absolute radio frequency channel number (EARFCN) ) , and may be positioned according to a channel raster for discovery by UEs 115.
  • E-UTRA absolute radio frequency channel number E-UTRA absolute radio frequency channel number
  • Carriers may be downlink or uplink (e.g., in an FDD mode) , or be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
  • signal waveforms transmitted over a carrier may be made up of multiple sub-carriers (e.g., using multi-carrier modulation (MCM) techniques such as OFDM or DFT-s-OFDM) .
  • MCM multi-carrier modulation
  • the organizational structure of the carriers may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR, etc. ) .
  • communications over a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling to support decoding the user data.
  • a carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc. ) and control signaling that coordinates operation for the carrier.
  • acquisition signaling e.g., synchronization signals or system information, etc.
  • control signaling that coordinates operation for the carrier.
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • 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 time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • control information transmitted in a physical control channel may be distributed between different control regions in a cascaded manner (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces) .
  • a carrier may be associated with a particular bandwidth of the radio frequency 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 number of predetermined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) .
  • each served UE 115 may be configured for operating over portions or all of the carrier bandwidth.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .
  • a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .
  • 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 more resource elements that a UE 115 receives and the higher the order of the modulation scheme the higher the data rate may be for the UE 115.
  • 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) , and the use of multiple spatial layers may further increase the data rate for communications with a UE 115.
  • a spatial resource e.g., spatial layers
  • Devices of the wireless communications system 100 may have a hardware configuration that supports communications over a particular carrier bandwidth, or may be configurable to support communications over one of a set of carrier bandwidths.
  • the wireless communications system 100 may include base stations 105 and/or UEs 115 that can support simultaneous communications via carriers associated with more than one different carrier bandwidth.
  • Wireless communications system 100 may support communication with a UE 115 on multiple cells or carriers, a feature which may be referred to as carrier aggregation (CA) or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink CCs and one or more uplink CCs according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both FDD and TDD component carriers.
  • wireless communications system 100 may utilize enhanced component carriers (eCCs) .
  • eCC may be characterized by one or more features including wider carrier or frequency channel bandwidth, shorter symbol duration, shorter TTI duration, or modified control channel configuration.
  • an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have a suboptimal or non-ideal backhaul link) .
  • An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum) .
  • An eCC characterized by wide carrier bandwidth may include one or more segments that may be utilized by UEs 115 that are not capable of monitoring the whole carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to conserve power) .
  • an eCC may utilize a different symbol duration than other CCs, which may include use of a reduced symbol duration as compared with symbol durations of the other CCs.
  • a shorter symbol duration may be associated with increased spacing between adjacent subcarriers.
  • a device such as a UE 115 or base station 105, utilizing eCCs may transmit wideband signals (e.g., according to frequency channel or carrier bandwidths of 20, 40, 60, 80 MHz, etc. ) at reduced symbol durations (e.g., 16.67 microseconds) .
  • a TTI in eCC may consist of one or multiple symbol periods. In some cases, the TTI duration (that is, the number of symbol periods in a TTI) may be variable.
  • Wireless communications systems such as an NR system may utilize any combination of licensed, shared, and unlicensed spectrum bands, among others.
  • the flexibility of eCC symbol duration and subcarrier spacing may allow for the use of eCC across multiple spectrums.
  • NR shared spectrum may increase spectrum utilization and spectral efficiency, specifically through dynamic vertical (e.g., across the frequency domain) and horizontal (e.g., across the time domain) sharing of resources.
  • a UE 115 and a base station 105 described herein may implement a signaling mechanism to reduce a number of blind decodings performed at the UE 115 when the base station 105 transmit repeated control information.
  • the base station 105 may transmit a configuration to the UE 115 which indicates the hypotheses that support control channel repetition for each aggregation level of configured search spaces.
  • the UE 115 may identify hypothesis pairs with a hypothesis from the first search space and a hypothesis from a second search space based on the configuration information. The same control information may be transmitted in both hypotheses of a hypothesis pair. This may reduce the total number of blind decodings the UE 115 performs when looking for repeated control information.
  • the UE 115 may monitor the first and second search spaces for the repeated control information based on the hypothesis pairs.
  • the configuration information may include how many decoding hypotheses per aggregation level are configured for control channel repetition. In some cases, the configuration information may explicitly indicate which decoding hypotheses are configured for control channel repetition. In some cases, the configuration information may indicate which decoding hypotheses make up a hypothesis pair.
  • the base station 105 and the UE 115 may also implement techniques to improve channel estimation across search spaces carrying repeated control information.
  • the control channel may be jointly estimated based on pilots of the search spaces.
  • the search spaces may have the same frequency allocation or at least a partial overlap in the frequency domain.
  • the base station 105 may apply the same precoder (e.g., open-loop precoder cycling) to the resource blocks in the overlapped frequency.
  • the search spaces or control resource sets may be configured to have the same precoder by default.
  • the precoders may be configured by signaling (e.g., higher layer signaling or semi-persistent scheduling) .
  • Acronyms such as PDSCH, RB, PDCCH, AL, SS and others are used merely for convenience and are not exclusively limited to a specific technology.
  • FIG. 2 illustrates an example of a wireless communications system 200 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • wireless communications system 200 may implement aspects of wireless communication system 100.
  • the wireless communications system 200 may include base station 105-a and UE 115-a, which may be respective examples of a base station 105 and a UE 115 as described herein.
  • the wireless communications system 200 may be an example of a low latency wireless communications system.
  • UE 115-a and base station 105-a may employ ultra-reliable low latency communications (URLLC) .
  • URLLC ultra-reliable low latency communications
  • Wireless devices operating in low latency communications systems may employ techniques to improve control channel reception performance at a receiving device.
  • base station 105-a may transmit control information to UE 115-a, and successful reception of the control information at UE 115-a may be important to meet stringent latency and reliability requirements of the low latency communications system.
  • PDCCH may be an example of the control channel.
  • base station 105-a may transmit repetitions of the control information to improve the control channel receive performance.
  • Base station 105-a may configure a first search space and a second search space for control channel repetition.
  • SS1 210 may be an example of the first search space
  • SS2 215 may be an example of the second search space.
  • base station 105-a may configure even more search spaces which may be used to transmit control channel repetitions.
  • Base station 105-a may use an identifier of UE 115-a to scramble the control channel signaling for UE 115-a. Base station 105-a then transmits the scrambled signal in the configured search spaces. Base station 105-a may transmit the control information using a number of control channel elements (CCEs) . The number of CCEs allocated for a control channel is referred to as the aggregation level of that control channel. For example, base station 105-a may transmit the control channel signaling using one CCE (e.g., aggregation level 1) or two CCEs (e.g., aggregation level 2) . The control channel is transmitted starting at a CCE index.
  • CCEs control channel elements
  • UE 115-a may blindly decode in the configured search spaces to detect and receive the control channel signaling.
  • UE 115-a uses its identifiers, such as its RNTI, in an attempt to descramble the control channel and receive the control channel signaling.
  • UE 115-a may perform multiple blind decodings at different control channel element (CCE) indexes and aggregation levels.
  • CCE control channel element
  • Each search space may have a number of decoding hypotheses where the control channel could be in the search space. For example, the number of decoding hypothesis of a search space may be based on the size of the search space, which aggregation levels are supported, which interleaving schemes are supported, among other factors.
  • UE 115-a may perform a large number of blind decodings. For example, if SS1 210 has M decoding hypotheses and SS2 215 has N decoding hypotheses, UE 115-a may perform up to M*N blind detections to receive the repeated control channel. In some cases, the more blind decodings performed at the receiver, the more complex the decoding process.
  • UE 115-a and base station 105-a may implement a signaling mechanism to reduce a number of blind decodings performed at UE 115-a.
  • Base station 105-a may transmit a configuration 205 to UE 115-a which indicates a number of hypotheses that support repetition for each aggregation level.
  • UE 115-a may identify hypothesis pairs with a hypothesis from a first search space and a hypothesis from a second search space based on the configuration information.
  • UE 115-a may try to pair the regular and repetition search space with the same aggregation level that supports repetition.
  • decoding hypotheses of different aggregation levels may also be paired.
  • the same control information may be transmitted in both hypotheses of a hypothesis pair.
  • Configuring the UE with a set of one or more hypothesis pairs may reduce the total number of blind decodings UE 115-a performs when looking for a repeated control channel.
  • UE 115-a may monitor the first and second search spaces for repeated control information based on the hypothesis pairs. Techniques described herein may reduce decoding complexity at UE 115-a while providing scheduling flexibility for base station 105-a.
  • the configuration 205 may include a bitmap which may explicitly indicate a hypothesis pair including a hypothesis of SS1 210 and a hypothesis from SS2 215.
  • base station 105-a may indicate whether each hypothesis is configured for repetition using the bitmap. For example, a ‘0’ indicates the hypothesis is not configured for repetition and a ‘1’ indicates the hypothesis is configured for repetition, or the other way around.
  • base station 105-a may indicate candidate indices for the repeated hypothesis.
  • the candidate indices of the repeated hypothesis may be configured by base station 105-a.
  • UE 115-a may assume the lowest indexed hypothesis are used for control channel repetition.
  • An example configuration field may include “repCandidates, ” with fields including values such as
  • the configuration field may include the enumerated value or the bit-map, or both.
  • a configuration field such as repCandidates may be included in a search space configuration. In some cases, the configuration field may be transmitted as part of RRC signaling.
  • Some implementations may provide different options for pairing or combining decoding hypotheses from different search spaces.
  • a decoding hypothesis from SS1 210 may only be paired with a decoding hypothesis from SS2 215 if they have the same aggregation level. This is further described in FIG. 3.
  • different aggregation levels of different search spaces can be combined (e.g., no restrictions for pairing decoding hypotheses) .
  • any decoding hypothesis from SS1 210 can be paired with a decoding hypothesis from SS2 215. This is further described in FIG. 4.
  • the regular search space and a repetition search space may be combined if the aggregation level of the regular search space is larger than or equal to the aggregation level of the repetition search space.
  • a decoding hypothesis from SS1 210 can be paired with any decoding hypothesis from SS2 210, as long as the decoding hypothesis from SS2 210 has an equal or greater aggregation level. This is further described in FIG. 5.
  • the configuration 205 may include dedicated signaling (e.g., radio resource control (RRC) signaling) for indicating repetition pairs.
  • RRC radio resource control
  • the dedicated signaling may indicate which search spaces support control channel repetition and indicate hypothesis pairs from the search spaces.
  • base station 105-a may use a one-to-one mapping between two search spaces.
  • a first search space has 4 aggregation levels to search and the second search space has two aggregation levels to search.
  • Base station 105-a may use a set of bits (e.g., bits representing a value between 0 and 3) to represent one or more aggregation levels of SS1 210 that support repetition and each correspond to a hypothesis for the UE to search within SS1 210, and may use a set of bits (e.g., bits representing a value between 0 and 1) to represent one or more aggregation levels of SS2 215 that support repetition and each correspond to a hypothesis for the UE to search within SS2 215.
  • Base station 105-a may transmit a pair of values which indicates an aggregation level of the first search space and an aggregation level of the second search space which are paired.
  • base station 105-a transmits ⁇ AL1 (1) , AL1 (1) ⁇ , this may indicate the first aggregation level of the first search space is paired with the second aggregation level of the second search space.
  • ⁇ AL2 (1) , AL1 (1) ⁇ may indicate the second aggregation level of the first search space is paired with the first aggregation level of the second search space. The following four pairs may be selected to support repetition:
  • the signaling may include up to as many value pairs are there are hypothesis pairs and repeated control channels.
  • UE 115-a may search within the repetition-search-space across two, or multiple, search spaces for the control channel.
  • Base station 105-a and UE 115-a may also implement techniques to improve channel estimation across search spaces carrying a repeated control channel.
  • the control channel may be jointly estimated based on pilots of the search spaces.
  • the search spaces may have the same frequency allocation or at least a partial overlap in the frequency domain.
  • Base station 105-a may apply the same precoder (e.g., open-loop precoder cycling) to the RBs in the overlapped frequency.
  • the search spaces or control resource sets may be configured to have the same precoder by default.
  • the precoders may be configured by signaling (e.g., higher layer signaling or semi-persistent scheduling) . In some cases, this may provide a tradeoff of diversity and channel estimation. In some cases, different precoders may provide better diversity, while using the same precoder may provide better channel estimation capability.
  • FIG. 3 illustrates an example of a search space repetition indication 300 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the search space repetition indication 300 may implement aspects of wireless communication system 100.
  • a base station 105 may repeat transmission of a control channel to improve decoding performance at a UE 115.
  • the base station 105 may configure a first search space and a second search space.
  • the base station 105 may transmit the control channel in the first search space and transmit a repetition of the control channel in the second search space.
  • the base station 105 may configure a first search space 305 for transmitting the original control channel, and base station 105 may configure a second search space 310 for transmitting a repetition of the control channel.
  • the indicator AL X (A, B) may mean the aggregation level of size X on search space A with candidate index B.
  • AL2 (1, 3) indicates aggregation level 2 of search space 1 with candidate index 3. This convention may be used to reference decoding candidates of the search spaces.
  • the base station 105 may transmit a configuration to reduce a number of blind decodings performed at the UE 115.
  • the configuration information may indicate a number of decoding hypotheses or candidates that support control channel repetition for each aggregation level of each search space.
  • the configuration information may indicate that the first aggregation level has two decoding hypotheses configured for repetition, and the second aggregation level has two decoding hypotheses configured for repetition.
  • the configuration information may indicate that the first aggregation level has one decoding hypothesis configured for repetition, and the second aggregation level has one decoding hypothesis configured for repetition.
  • the search space repetition signaling 300 may be an example of an indication scheme where only the same aggregation level of different search spaces can be combined in decoding.
  • the UE 115 may identify four hypothesis pairs which may carry repeated control information.
  • the four hypothesis pairs results in fewer blind decodes than the 48 total pairs the UE 115 would check without the configuration information.
  • UE 115 using the techniques described herein can refrain from performing blind decodings for 44 other hypothesis pairs.
  • control information may be transmitted in decoding hypothesis 325-a of the first aggregation level 315 of the first search space 305, and that control information may be repeated in decoding hypothesis 325-c of the first aggregation level 315 of the second search space 310.
  • the UE 115 may identify AL1 (1, 2) and AL1 (2, 1) as hypothesis pair 330-a.
  • the control channel may be transmitted in decoding hypothesis 325-b of the first aggregation level 315 of the first search space 305 and may be repeated in decoding hypothesis 325-c of the first aggregation level 315 of the second search space 310.
  • the UE 115 may identify AL1 (1, 1) and AL1 (2, 1) as hypothesis pair 330-b.
  • control information may be transmitted in decoding hypothesis 325-d of the second aggregation level 320 of the first search space 305 and repeated in decoding hypothesis 325-f of the second aggregation level 320 of the second search space 310.
  • the UE 115 may identify AL2 (1, 2) and AL2 (2, 1) as hypothesis pair 330-c.
  • control information may be transmitted in decoding hypothesis 325-e of the second aggregation level 320 of the first search space 305 and repeated in decoding hypothesis 325-f of the second aggregation level 320 of the second search space 310.
  • the UE 115 may identify AL2 (1, 1) and AL2 (2, 1) as hypothesis pair 330-d.
  • the decoding hypotheses or candidates which actually carry control channel information and repeated control channel information may vary.
  • the candidates with the lowest index may be used to transmit the control channel.
  • other candidates may carry the control information.
  • the configuration information states that the first search space 305 has two candidates in the first aggregation level 315 configured for control channel repetition, those two candidates may be any two candidates of the configured candidates.
  • the configured decoding hypotheses of the first search space 305 of the first aggregation level 315 may be any two of AL1 (1, 1) , AL1 (1, 2) , AL1 (1, 3) , and AL1 (1, 4) .
  • the base station 105 may transmit a bitmap which explicitly indicates one or more hypotheses in the respective search spaces that may support repetition of control information.
  • the bitmap may explicitly indicate that decoding hypotheses 325-a, 325-b, 325-d, and 325-e of the first search space 305 are configured for control channel repetition.
  • a bitmap for the second search space may indicate that decoding hypotheses 325-c and 325-f are configured for control channel repetition.
  • FIG. 4 illustrates an example of a search space repetition indication 400 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • search space repetition indication 400 may implement aspects of wireless communication system 100.
  • a base station 105 may repeat transmission of a control channel to improve decoding performance at a UE 115.
  • the base station 105 may configure a first search space and a second search space.
  • the base station 105 may transmit the control channel in the first search space and transmit a repetition of the control channel in the second search space.
  • the base station 105 may configure a first search space 405 for transmitting the original control information, and base station 105 may configure a second search space 410 for transmitting a repetition of the control information.
  • the base station 105 may transmit a configuration to reduce a number of blind decodings performed at the UE 115.
  • the configuration information may indicate a number of decoding hypotheses or candidates that support control channel repetition for each aggregation level of each search space.
  • the configuration information may indicate that the first aggregation level 415 has two decoding hypotheses configured for repetition, and the second aggregation level 420 has two decoding hypotheses configured for repetition.
  • the configuration information may indicate that the first aggregation level 415 has one decoding hypothesis configured for repetition, and the second aggregation level 420 has one decoding hypothesis configured for repetition.
  • the search space repetition signaling 400 may be an example of an indication scheme where any aggregation level of the first search space 405 can be paired with any aggregation level of the second search space 410.
  • the UE 115 may identify eight hypothesis pairs which may carry repeated control information.
  • the UE 115 may identify decoding hypotheses 425-a and 425-b, or AL1 (1, 2) , and AL1 (1, 1) respectively.
  • the UE 115 may identify decoding hypotheses 425-d and 425-e, or AL2 (1, 2) and AL2 (1, 1) respectively.
  • the UE 115 may identify decoding hypothesis 425-c, or AL1 (2, 1) .
  • the UE 115 may identify decoding hypothesis 425-f, or AL2 (2, 1) .
  • Control information transmitted in a decoding hypothesis 425 of the first search space 405 may be repeated in any decoding hypothesis 425 of the second search space 410.
  • AL1 (1, 2) may be paired with AL1 (2, 1) (e.g., hypothesis pair 430-a) or AL2 (2, 1) (e.g., hypothesis pair 430-b) .
  • AL1 (1, 1) may also be paired with AL1 (2, 1) (e.g., hypothesis pair 430-c) or AL2 (2, 1) (e.g., hypothesis pair 430-d) .
  • AL2 (1, 2) may be paired with AL1 (2, 1) (e.g., hypothesis pair 430-e) or AL2 (2, 1) (e.g., hypothesis pair 430-f) .
  • AL2 (1, 1) may be paired with AL1 (2, 1) (e.g., hypothesis pair 430-g) or AL2 (2, 1) (e.g., hypothesis pair 430-h) .
  • the eight hypothesis pairs result in fewer blind decodes than the 48 total pairs the UE 115 would check without the configuration information. As described herein, if there are 8 candidates in the first search space and 6 candidates in the second space, this results in 48 hypothesis pairs which a conventional UE 115 would check. By receiving an indication of these eight hypothesis pairs, the UE 115 can refrain from performing blind decodings for 40 other hypothesis pairs.
  • the decoding hypotheses or candidates which actually carry the control channel and control channel repetition may vary.
  • the candidates with the lowest index may be used to transmit the control channel.
  • other candidates may carry the control information.
  • those two decoding hypotheses may be any two candidates of the candidates.
  • the configured decoding hypotheses of the first search space 405 of the first aggregation level 415 may be any two of AL1 (1, 1) , AL1 (1, 2) , AL1 (1, 3) , and AL1 (1, 4) .
  • the base station 105 may transmit a bitmap which explicitly indicates the decoding hypotheses carrying repeated control information.
  • the bitmap may explicitly indicate that decoding hypotheses 425-a, 425-b, 425-d, and 425-e of the first search space 405 are configured for control channel repetition.
  • a bitmap for the second search space may indicate that decoding hypotheses 425-c and 425-f are configured for control channel repetition.
  • FIG. 5 illustrates an example of a search space repetition indication 500 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • search space repetition indication 500 may implement aspects of wireless communication system 100.
  • a base station 105 may repeat transmission of a control channel to improve decoding performance at a UE 115.
  • the base station 105 may configure a first search space and a second search space.
  • the base station 105 may transmit the control channel in the first search space and transmit a repetition of the control channel in the second search space.
  • the base station 105 may configure a first search space 505 as a first search space for transmitting the original control information, and base station 105 may configure a second search space 510 for transmitting a repetition of the control information.
  • the base station 105 may transmit a configuration to reduce a number of blind decodings performed at the UE 115.
  • the configuration information may indicate a number of decoding hypotheses or candidates that support control channel repetition for each aggregation level of each search space.
  • the configuration information may indicate that the first aggregation level 515 has two decoding hypotheses configured for repetition, and the second aggregation level 520 has two decoding hypotheses configured for repetition.
  • the configuration information may indicate that the first aggregation level 515 has one decoding hypothesis configured for repetition, and the second aggregation level 520 has one decoding hypothesis configured for repetition.
  • the search space repetition signaling 500 may be an example of an indication scheme where a decoding hypothesis of the first search space 505 can be paired with a decoding hypothesis of the second search space 510 as long as the decoding hypothesis of the first search space has an equal or greater aggregation level than the decoding hypothesis of the second search space.
  • the UE 115 may identify six hypothesis pairs which may carry repeated control information.
  • the UE 115 may identify decoding hypotheses 525-a and 525-b, or AL1 (1, 2) , and AL1 (1, 1) respectively.
  • the UE 115 may identify decoding hypotheses 525-d and 525-e, or AL2 (1, 2) and AL2 (1, 1) respectively.
  • the UE 115 may identify decoding hypothesis 525-c, or AL1 (2, 1) .
  • the UE 115 may identify decoding hypothesis 525-f, or AL2 (2, 1) .
  • the six hypothesis pairs may include hypothesis pair 530-a through 530-f.
  • Hypothesis pair 530-a may include AL1 (1, 2) and AL1 (2, 1)
  • hypothesis pair 530-b may include AL1 (1, 1) and AL1 (2, 1)
  • hypothesis pair 530-c may include AL2 (1, 2) and AL1 (2, 1)
  • hypothesis pair 530-d may include AL2 (1, 2) and AL2 (2, 1)
  • Hypothesis pair 530-e may include AL2 (1, 1) and AL1 (2, 1)
  • hypothesis pair 530-f may include AL2 (1, 1) and AL2 (2, 1) .
  • the UE 115 can refrain from performing blind decodings for 42 other hypothesis pairs.
  • Control information transmitted in a decoding hypothesis 525 of the first search space 505 may be repeated in any decoding hypothesis 525 of the second search space 510, as long as the decoding hypothesis 525 of the second search space 510 has a higher or equal aggregation level.
  • AL1 (1, 2) and AL1 (1, 1) may be paired with AL1 (2, 1) , as they have the same aggregation level.
  • AL1 (1, 2) and AL1 (1, 1) may not be paired with AL2 (2, 1) , as AL2 (2, 1) has a higher aggregation level.
  • AL2 (1, 2) and AL2 (1, 1) may be paired with AL1 (2, 1) or AL2 (2, 1) .
  • Decoding hypothesis 525-d and 525-e each have a higher aggregation level than decoding hypothesis 525-c, so they may each be a hypothesis pair with decoding hypothesis 525-c.
  • the decoding hypotheses or candidates which actually carry the control channel and control channel repetition may vary.
  • the candidates with the lowest index may be used to transmit the control channel.
  • other candidates may carry the control information.
  • those two decoding hypotheses may be any two of the candidates.
  • the configured decoding hypotheses of the first search space 505 of the first aggregation level 515 may be any two of AL1 (1, 1) , AL1 (1, 2) , AL1 (1, 3) , and AL1 (1, 4) .
  • the base station 105 may transmit a bitmap which explicitly indicates the decoding hypotheses carrying repeated control information.
  • the bitmap may explicitly indicate that decoding hypotheses 525-a, 525-b, 525-d, and 525-e of the first search space 505 are configured for control channel repetition.
  • a bitmap for the second search space may indicate that decoding hypotheses 525-c and 525-f are configured for control channel repetition.
  • FIG. 6 illustrates an example of a search space repetition indication 600 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • search space repetition indication 600 may implement aspects of wireless communication system 100.
  • a base station 105 may repeat transmission of a control channel to improve decoding performance at a UE 115.
  • the base station 105 may configure a first search space and a second search space.
  • the base station 105 may transmit the control channel in the first search space and transmit a repetition of the control channel in the second search space.
  • the base station 105 may configure a first search space 605 for transmitting the original control information, and base station 105 may configure a second search space 610 for transmitting a repetition of the control information.
  • the base station 105 may transmit a configuration to reduce a number of blind decodings performed at the UE 115.
  • the configuration information may include dedicated signaling to indicate hypothesis pairs.
  • the configuration information may indicate which search spaces support control channel repetition and indicate the pairs of hypotheses from the search spaces.
  • the configuration information may include a parameter such as “Repetition-search-space. ”
  • the configuration information may provide a one-to-one mapping for two search spaces. If a first search space has 4 aggregation levels to search and the second search space has two aggregation levels to search, the configuration information may include explicit signaling for which aggregation levels support repetition. These techniques described herein may minimize decoding complexity at the UE 115.
  • the UE 115 may search within the search spaces and aggregation levels indicated by the configuration information for the repeated control information.
  • the configuration information indicates that a first search space 605 and a second search space 610 are configured for control channel repetition.
  • the base station 105 may have other search spaces (e.g., including a third search space) configured, which may also be additionally, or alternatively, configured for control channel repetition in other examples.
  • the configuration information “Repetition-search-space” as shown may indicate three hypothesis pairs.
  • the configuration information indicates that one decoding hypothesis 625 of the first aggregation level 615 of the first search space 605 is paired with a decoding hypothesis 625 of the first aggregation level 615 of the second search space 610. This corresponds to the value ⁇ AL1 (1) , AL1 (1) ⁇ in the configuration information and hypothesis pair 630-a.
  • decoding hypothesis 625-a may be paired with decoding hypothesis 625-b.
  • the configuration information may indicate that a decoding hypothesis 625 of the second aggregation level 620 of the first search space 605 may be paired with a decoding hypothesis 625 of the second aggregation level 620 of the second search space 610. This corresponds to the value ⁇ AL2 (1) , AL2 (1) ⁇ and hypothesis pair 630-c.
  • decoding hypothesis 625-c may be paired with decoding hypothesis 625-b.
  • the configuration information may also indicate that a decoding hypothesis 625 of the second aggregation level 620 of the first search space 605 may be paired with a decoding hypothesis 625 of the first aggregation level 615 of the second search space 610. This corresponds to the value ⁇ AL2 (1) , AL1 (1) ⁇ and hypothesis pair 630-c.
  • decoding hypothesis 625-c may be paired with decoding hypothesis 625-d. As described in FIGs. 3 through 5, this may reduce the number of blind decodings performed by the UE 115 from 48 to three.
  • the decoding hypotheses or candidates which actually carry the control channel and control channel repetition may vary.
  • the candidates with the lowest index may be used to transmit the control channel.
  • other candidates may carry the control information.
  • the decoding hypothesis may be any of the candidates.
  • the configured decoding hypothesis of the first search space 605 of the first aggregation level 615 may be AL1 (1, 1) , AL1 (1, 2) , AL1 (1, 3) , or AL1 (1, 4) .
  • FIG. 7 illustrates an example of a repetition search space configuration 700 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • repetition search space configuration 700 may implement aspects of wireless communication system 100.
  • a base station 105 may repeat transmission of a control channel to improve decoding performance at a UE 115.
  • the base station 105 may configure a first search space 705 (e.g., the regular search space) and a second search space 710 (e.g., the repetition search space) .
  • the base station 105 may transmit the control channel in the first search space 705 and transmit a repetition of the control channel in the second search space 710.
  • the two search spaces may have the same frequency allocation or have at least a partial frequency overlap 715.
  • the base station 105 and the UE 115 may implement techniques to improve channel estimation at the UE 115.
  • the control channel may be estimated based on pilots of the first search space 705 and the second search space 710.
  • the base station 105 may use the same precoder on the resource blocks of the overlapping frequency regions (e.g., corresponding to the frequency overlap 715) .
  • Using the same precoder (e.g., open-loop precoder cycling) for the overlapping resource blocks may provide better channel estimation capability for the UE 115.
  • SNR signal to noise ratio
  • the base station 105 may use the same precoder for the first search space 705 and any repetition search spaces (e.g., including second search space 710) by default.
  • the base station 105 may use the same precoder for the control resource sets corresponding to the search spaces.
  • the base station 105 may signal whether the precoders for the first search space 705 and the second search space 710 are the same or different.
  • the base station 105 may use higher layer signaling (e.g., RRC signaling) or semi-persistent signaling to indicate whether the search spaces will use the same precoder or different precoders.
  • FIG. 8 illustrates an example of a process flow 800 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • process flow 800 may implement aspects of wireless communication system 100.
  • base station 105-b may identify a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • base station 105-b may transmit configuration information that indicates a subset of a first set of decoding hypotheses in the first search space support repetition and a subset of a second set of decoding hypotheses in the second search space support repetition. For example, base station 105-b may transmit configuration information that indicates which decoding hypotheses support control channel repetition in each search space. Base station 105-b may indicate the number of hypotheses that support control channel repetition for each aggregation level of the first and second search space. Example of this are described herein and at least with reference to at least FIGs. 3 through 5.
  • base station 105-b may transmit configuration information that includes a bitmap that indicates a subset of a first set of decoding hypotheses in the first search space support repetition and a subset of a second set of decoding hypotheses in the second search space support repetition. In some cases, base station 105-b may transmit a bitmap which more precisely indicates which hypotheses per aggregation level of a search space are configured for control channel repetition.
  • base station 105-b may transmit configuration information that indicates the first decoding hypothesis in the first search space and the second decoding candidate in the second search space for each repetition hypothesis pair of the set of hypothesis pairs. For example, base station 105-b may use a one-to-one mapping for decoding hypotheses of the search spaces.
  • the configuration information may indicate which search spaces support control channel repetition and indicate the pairs of hypotheses from the configured search spaces. Examples of this may be found herein, including at least FIG. 6.
  • base station 105-b may transmit configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs.
  • base station 105-b may transmit the configuration information via higher layer signaling, such as via RRC signaling.
  • UE 115-b may receive the configuration information.
  • UE 115-b may identify a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • the configuration information may include an indication of a number of hypotheses that support repetition for each aggregation level of each search space.
  • the configuration information may include a bitmap to indicate that decoding hypotheses of each hypothesis pair.
  • the configuration information may include an indication of which search spaces support control channel repetition and indicate a hypothesis from each search space for each hypothesis pair.
  • UE 115-b may monitor the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs.
  • base station 105-b may transmit, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • UE 115-b may decode, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • UE 115-b and base station 105-b may communicate in accordance with the control information.
  • the control information may be downlink control information which includes a grant scheduling uplink or downlink communications, and UE 115-b and base station 105-b may communicate according to the granted resources.
  • UE 115-b may jointly estimate a channel of the first search space and of the second search space to generate a joint channel estimate based on a first pilot tone within the first search space and a second pilot tone within the second search space, where the decoding of the control information is based on the joint channel estimate.
  • the first search space at least partially overlaps in frequency with the second search space.
  • Base station 105-b may transmit a first pilot tone within the first search space and a second pilot tone within the second search space.
  • base station 105-b may use a same precoder for the first pilot tone and the second pilot tone. For example, base station 105-b may apply a same precoding to at least one resource block within which the first search space at least partially overlaps in frequency with the second search space.
  • FIG. 9 shows a block diagram 900 of a device 905 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the device 905 may be an example of aspects of a UE 115 as described herein.
  • the device 905 may include a receiver 910, a communications manager 915, and a transmitter 920.
  • the device 905 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 910 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 control information repetition signaling design, etc. ) . Information may be passed on to other components of the device 905.
  • the receiver 910 may be an example of aspects of the transceiver 1220 described with reference to FIG. 12.
  • the receiver 910 may utilize a single antenna or a set of antennas.
  • the communications manager 915 may receive configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space, identify a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, monitor the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs, and decode, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • the communications manager 915 may be an example of aspects of the communications manager 1210 described herein.
  • the communications manager 915 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 915, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC) , a 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.
  • code e.g., software or firmware
  • ASIC application-specific integrated circuit
  • the communications manager 915 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 915, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 915, 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 920 may transmit signals generated by other components of the device 905.
  • the transmitter 920 may be collocated with a receiver 910 in a transceiver module.
  • the transmitter 920 may be an example of aspects of the transceiver 1220 described with reference to FIG. 12.
  • the transmitter 920 may utilize a single antenna or a set of antennas.
  • FIG. 10 shows a block diagram 1000 of a device 1005 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the device 1005 may be an example of aspects of a device 905, or a UE 115 as described herein.
  • the device 1005 may include a receiver 1010, a communications manager 1015, and a transmitter 1040.
  • the device 1005 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 1010 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 control information repetition signaling design, etc. ) . Information may be passed on to other components of the device 1005.
  • the receiver 1010 may be an example of aspects of the transceiver 1220 described with reference to FIG. 12.
  • the receiver 1010 may utilize a single antenna or a set of antennas.
  • the communications manager 1015 may be an example of aspects of the communications manager 915 as described herein.
  • the communications manager 1015 may include a configuration information component 1020, a repetition hypothesis pair identifier 1025, a monitoring component 1030, and a decoding component 1035.
  • the communications manager 1015 may be an example of aspects of the communications manager 1210 described herein.
  • the configuration information component 1020 may receive configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space.
  • the repetition hypothesis pair identifier 1025 may identify a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • the monitoring component 1030 may monitor the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs.
  • the decoding component 1035 may decode, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • the transmitter 1040 may transmit signals generated by other components of the device 1005.
  • the transmitter 1040 may be collocated with a receiver 1010 in a transceiver module.
  • the transmitter 1040 may be an example of aspects of the transceiver 1220 described with reference to FIG. 12.
  • the transmitter 1040 may utilize a single antenna or a set of antennas.
  • FIG. 11 shows a block diagram 1100 of a communications manager 1105 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the communications manager 1105 may be an example of aspects of a communications manager 915, a communications manager 1015, or a communications manager 1210 described herein.
  • the communications manager 1105 may include a configuration information component 1110, a repetition hypothesis pair identifier 1115, a monitoring component 1120, a decoding component 1125, and a channel estimation component 1130. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the configuration information component 1110 may receive configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space.
  • the configuration information component 1110 may receive the configuration information that indicates a first subset of a first set of decoding hypotheses in the first search space support repetition and a second subset of a second set of decoding hypotheses in the second search space support repetition, where identifying of the set of repetition hypothesis pairs is based on the first subset and the second subset.
  • receiving the configuration information that includes a bitmap that indicates a subset of a first set of decoding hypotheses in the first search space support repetition and a subset of a second set of decoding hypotheses in the second search space support repetition, where identifying of the set of repetition hypothesis pairs is based on the bitmap.
  • the configuration information component 1110 may receive the configuration information that indicates the first decoding hypothesis in the first search space and the second decoding hypothesis in the second search space for each repetition hypothesis pair of the set of repetition hypothesis pairs.
  • the repetition hypothesis pair identifier 1115 may identify a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • the set of repetition hypothesis pairs are a subset of repetition hypothesis pairs available between the first search space and the second search space.
  • the first decoding hypothesis has a same aggregation level as the second decoding hypothesis. In some cases, the first decoding hypothesis has a different aggregation level than the second decoding hypothesis. In some cases, the first decoding hypothesis has a larger aggregation level than the second decoding hypothesis. In some cases, the first decoding hypothesis has a same aggregation level as a combination of an aggregation level of the second decoding hypothesis with an aggregation level of a third decoding hypothesis of the second search space.
  • the monitoring component 1120 may monitor the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs.
  • the decoding component 1125 may decode, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • the channel estimation component 1130 may jointly estimate a channel of the first search space and of the second search space to generate a joint channel estimate based on a first pilot tone within the first search space and a second pilot tone within the second search space, where the decoding of the control information is based on the joint channel estimate.
  • the first search space at least partially overlaps in frequency with the second search space.
  • FIG. 12 shows a diagram of a system 1200 including a device 1205 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the device 1205 may be an example of or include the components of device 905, device 1005, or a UE 115 as described herein.
  • the device 1205 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1210, an I/O controller 1215, a transceiver 1220, an antenna 1225, memory 1230, and a processor 1240. These components may be in electronic communication via one or more buses (e.g., bus 1245) .
  • buses e.g., bus 1245
  • the communications manager 1210 may receive configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space, identify a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, monitor the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs, and decode, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • the I/O controller 1215 may manage input and output signals for the device 1205.
  • the I/O controller 1215 may also manage peripherals not integrated into the device 1205.
  • the I/O controller 1215 may represent a physical connection or port to an external peripheral.
  • the I/O controller 1215 may utilize an operating system such as or another known operating system.
  • the I/O controller 1215 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 1215 may be implemented as part of a processor.
  • a user may interact with the device 1205 via the I/O controller 1215 or via hardware components controlled by the I/O controller 1215.
  • the transceiver 1220 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 1220 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1220 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 1225. However, in some cases the device may have more than one antenna 1225, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 1230 may include RAM and ROM.
  • the memory 1230 may store computer-readable, computer-executable code 1235 including instructions that, when executed, cause the processor to perform various functions described herein.
  • the memory 1230 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 processor 1240 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 1240 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 1240.
  • the processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1230) to cause the device 1205 to perform various functions (e.g., functions or tasks supporting control information repetition signaling design) .
  • the code 1235 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 1235 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 1235 may not be directly executable by the processor 1240 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 13 shows a block diagram 1300 of a device 1305 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the device 1305 may be an example of aspects of a base station 105 as described herein.
  • the device 1305 may include a receiver 1310, a communications manager 1315, and a transmitter 1320.
  • the device 1305 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 1310 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 control information repetition signaling design, etc. ) . Information may be passed on to other components of the device 1305.
  • the receiver 1310 may be an example of aspects of the transceiver 1620 described with reference to FIG. 16.
  • the receiver 1310 may utilize a single antenna or a set of antennas.
  • the communications manager 1315 may identify a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, transmit configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs, and transmit, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • the communications manager 1315 may be an example of aspects of the communications manager 1610 described herein.
  • the communications manager 1315 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 1315, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC) , a 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.
  • code e.g., software or firmware
  • ASIC application-specific integrated circuit
  • the communications manager 1315 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 1315, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 1315, 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 1320 may transmit signals generated by other components of the device 1305.
  • the transmitter 1320 may be collocated with a receiver 1310 in a transceiver module.
  • the transmitter 1320 may be an example of aspects of the transceiver 1620 described with reference to FIG. 16.
  • the transmitter 1320 may utilize a single antenna or a set of antennas.
  • FIG. 14 shows a block diagram 1400 of a device 1405 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the device 1405 may be an example of aspects of a device 1305, or a base station 105 as described herein.
  • the device 1405 may include a receiver 1410, a communications manager 1415, and a transmitter 1435.
  • the device 1405 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 1410 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 control information repetition signaling design, etc. ) . Information may be passed on to other components of the device 1405.
  • the receiver 1410 may be an example of aspects of the transceiver 1620 described with reference to FIG. 16.
  • the receiver 1410 may utilize a single antenna or a set of antennas.
  • the communications manager 1415 may be an example of aspects of the communications manager 1315 as described herein.
  • the communications manager 1415 may include a repetition hypothesis pair identifier 1420, a configuration information component 1425, and a control information transmitting component 1430.
  • the communications manager 1415 may be an example of aspects of the communications manager 1610 described herein.
  • the repetition hypothesis pair identifier 1420 may identify a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • the configuration information component 1425 may transmit configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs.
  • the control information transmitting component 1430 may transmit, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • the transmitter 1435 may transmit signals generated by other components of the device 1405.
  • the transmitter 1435 may be collocated with a receiver 1410 in a transceiver module.
  • the transmitter 1435 may be an example of aspects of the transceiver 1620 described with reference to FIG. 16.
  • the transmitter 1435 may utilize a single antenna or a set of antennas.
  • FIG. 15 shows a block diagram 1500 of a communications manager 1505 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the communications manager 1505 may be an example of aspects of a communications manager 1315, a communications manager 1415, or a communications manager 1610 described herein.
  • the communications manager 1505 may include a repetition hypothesis pair identifier 1510, a configuration information component 1515, a control information transmitting component 1520, and a pilot tone component 1525. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the repetition hypothesis pair identifier 1510 may identify a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • the set of repetition hypothesis pairs are a subset of repetition hypothesis pairs available between the first search space and the second search space.
  • the first decoding hypothesis has a same aggregation level as the second decoding hypothesis. In some cases, the first decoding hypothesis has a different aggregation level than the second decoding hypothesis. In some cases, the first decoding hypothesis has a larger aggregation level than the second decoding hypothesis. In some cases, the first decoding hypothesis has a same aggregation level as a combination of an aggregation level of the second decoding hypothesis with an aggregation level of a third decoding hypothesis of the second search space.
  • the configuration information component 1515 may transmit configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs.
  • the control information transmitting component 1520 may transmit, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • the control information transmitting component 1520 may transmit the configuration information that indicates a subset of a first set of decoding hypotheses in the first search space support repetition and a subset of a second set of decoding hypotheses in the second search space support repetition.
  • transmitting the configuration information that includes a bitmap that indicates a subset of a first set of decoding hypotheses in the first search space support repetition and a subset of a second set of decoding hypotheses in the second search space support repetition.
  • control information transmitting component 1520 may transmit the configuration information that indicates the first decoding hypothesis in the first search space and the second decoding hypothesis in the second search space for each repetition hypothesis pair of the set of repetition hypothesis pairs.
  • the pilot tone component 1525 may transmit a first pilot tone within the first search space and a second pilot tone within the second search space. In some examples, the pilot tone component 1525 may apply a same precoding to at least one resource block within which the first search space at least partially overlaps in frequency with the second search space. In some cases, the first search space at least partially overlaps in frequency with the second search space.
  • FIG. 16 shows a diagram of a system 1600 including a device 1605 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the device 1605 may be an example of or include the components of device 1305, device 1405, or a base station 105 as described herein.
  • the device 1605 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1610, a network communications manager 1615, a transceiver 1620, an antenna 1625, memory 1630, a processor 1640, and an inter-station communications manager 1645. These components may be in electronic communication via one or more buses (e.g., bus 1650) .
  • buses e.g., bus 1650
  • the communications manager 1610 may identify a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space, transmit configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs, and transmit, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • the network communications manager 1615 may manage communications with the core network (e.g., via one or more wired backhaul links) .
  • the network communications manager 1615 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • the transceiver 1620 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 1620 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1620 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 1625. However, in some cases the device may have more than one antenna 1625, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 1630 may include RAM, ROM, or a combination thereof.
  • the memory 1630 may store computer-readable code 1635 including instructions that, when executed by a processor (e.g., the processor 1640) cause the device to perform various functions described herein.
  • a processor e.g., the processor 1640
  • the memory 1630 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 processor 1640 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 1640 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into processor 1640.
  • the processor 1640 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1630) to cause the device 1605 to perform various functions (e.g., functions or tasks supporting control information repetition signaling design) .
  • the inter-station communications manager 1645 may manage communications with other base station 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1645 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager 1645 may provide an X2 interface within an LTE/LTE-A wireless communication network technology to provide communication between base stations 105.
  • the code 1635 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 1635 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 1635 may not be directly executable by the processor 1640 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 17 shows a flowchart illustrating a method 1700 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the operations of method 1700 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1700 may be performed by a communications manager as described with reference to FIGs. 9 through 12.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may receive configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space.
  • the operations of 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed by a configuration information component as described with reference to FIGs. 9 through 12.
  • the UE may identify a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • the operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed by a repetition hypothesis pair identifier as described with reference to FIGs. 9 through 12.
  • the UE may monitor the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs.
  • the operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be performed by a monitoring component as described with reference to FIGs. 9 through 12.
  • the UE may decode, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • the operations of 1720 may be performed according to the methods described herein. In some examples, aspects of the operations of 1720 may be performed by a decoding component as described with reference to FIGs. 9 through 12.
  • FIG. 18 shows a flowchart illustrating a method 1800 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the operations of method 1800 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1800 may be performed by a communications manager as described with reference to FIGs. 9 through 12.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may receive configuration information indicating a first search space and a second search space of at least one control channel and that control information included in the first search space is repeated in the second search space.
  • the operations of 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of 1805 may be performed by a configuration information component as described with reference to FIGs. 9 through 12.
  • the UE may identify a set of repetition hypothesis pairs based on the configuration information, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • the operations of 1810 may be performed according to the methods described herein. In some examples, aspects of the operations of 1810 may be performed by a repetition hypothesis pair identifier as described with reference to FIGs. 9 through 12.
  • the UE may monitor the first search space and the second search space of the at least one control channel based on the set of repetition hypothesis pairs.
  • the operations of 1815 may be performed according to the methods described herein. In some examples, aspects of the operations of 1815 may be performed by a monitoring component as described with reference to FIGs. 9 through 12.
  • the UE may jointly estimate a channel of the first search space and of the second search space to generate a joint channel estimate based on a first pilot tone within the first search space and a second pilot tone within the second search space, where the decoding of the control information is based on the joint channel estimate.
  • the operations of 1820 may be performed according to the methods described herein. In some examples, aspects of the operations of 1820 may be performed by a channel estimation component as described with reference to FIGs. 9 through 12.
  • the UE may decode, from the at least one control channel, control information that is included in the first search space and repeated in the second search space based on the monitoring.
  • the operations of 1825 may be performed according to the methods described herein. In some examples, aspects of the operations of 1825 may be performed by a decoding component as described with reference to FIGs. 9 through 12.
  • FIG. 19 shows a flowchart illustrating a method 1900 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the operations of method 1900 may be implemented by a base station 105 or its components as described herein.
  • the operations of method 1900 may be performed by a communications manager as described with reference to FIGs. 13 through 16.
  • a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.
  • the base station may identify a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • the operations of 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of 1905 may be performed by a repetition hypothesis pair identifier as described with reference to FIGs. 13 through 16.
  • the base station may transmit configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs.
  • the operations of 1910 may be performed according to the methods described herein. In some examples, aspects of the operations of 1910 may be performed by a configuration information component as described with reference to FIGs. 13 through 16.
  • the base station may transmit, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • the operations of 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of 1915 may be performed by a control information transmitting component as described with reference to FIGs. 13 through 16.
  • FIG. 20 shows a flowchart illustrating a method 2000 that supports control information repetition signaling design in accordance with aspects of the present disclosure.
  • the operations of method 2000 may be implemented by a base station 105 or its components as described herein.
  • the operations of method 2000 may be performed by a communications manager as described with reference to FIGs. 13 through 16.
  • a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.
  • the base station may identify a set of repetition hypothesis pairs for a first search space and a second search space of at least one control channel, each repetition hypothesis pair of the set of repetition hypothesis pairs indicating a first decoding hypothesis in the first search space and a second decoding hypothesis in the second search space in which to search for control information included in the first search space that is repeated in the second search space.
  • the operations of 2005 may be performed according to the methods described herein. In some examples, aspects of the operations of 2005 may be performed by a repetition hypothesis pair identifier as described with reference to FIGs. 13 through 16.
  • the base station may transmit configuration information indicating the first search space and the second search space of the at least one control channel, that control information included in the first search space is repeated in the second search space, and the set of repetition hypothesis pairs.
  • the operations of 2010 may be performed according to the methods described herein. In some examples, aspects of the operations of 2010 may be performed by a configuration information component as described with reference to FIGs. 13 through 16.
  • the base station may transmit a first pilot tone within the first search space and a second pilot tone within the second search space.
  • the operations of 2015 may be performed according to the methods described herein. In some examples, aspects of the operations of 2015 may be performed by a pilot tone component as described with reference to FIGs. 13 through 16.
  • the base station may transmit, in accordance with the configuration information, the control information in the first search space and a repetition of the control information in the second search space.
  • the operations of 2020 may be performed according to the methods described herein. In some examples, aspects of the operations of 2020 may be performed by a control information transmitting component as described with reference to FIGs. 13 through 16.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • a CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA) , etc.
  • CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
  • IS-2000 Releases may be commonly referred to as CDMA2000 1X, 1X, etc.
  • IS-856 TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD) , etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • a TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • GSM Global System for Mobile Communications
  • An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB) , Evolved UTRA (E-UTRA) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, etc.
  • UMB Ultra Mobile Broadband
  • E-UTRA Evolved UTRA
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDM
  • UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS) .
  • LTE, LTE-A, and LTE-A Pro are releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from the organization named “3rd Generation Partnership Project” (3GP
  • CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • 3GPP2 3rd Generation Partnership Project 2
  • the techniques described herein may be used for the systems and radio technologies mentioned herein as well as other systems and radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NR system 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 applications.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 115 with service subscriptions with the network provider.
  • a small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed, etc. ) frequency bands as macro cells.
  • Small cells may include pico cells, femto cells, and micro cells according to various examples.
  • a pico cell for example, may cover a small geographic area and may allow unrestricted access by UEs 115 with service subscriptions with the network provider.
  • a femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by UEs 115 having an association with the femto cell (e.g., UEs 115 in a closed subscriber group (CSG) , UEs 115 for users in the home, and the like) .
  • An eNB for a macro cell may be referred to as a macro eNB.
  • An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB.
  • An eNB may support one or multiple (e.g., two, three, four, and the like) cells, and may also support communications using one or multiple component carriers.
  • the wireless communications system 100 or systems described herein may support synchronous or asynchronous operation.
  • the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time.
  • the base stations 105 may have different frame timing, and transmissions from different base stations 105 may not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • 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.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • PLD programmable logic device
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional 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 can 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 can be accessed by a general purpose or special purpose computer.
  • non-transitory computer-readable media may include random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable read only memory (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 can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read only memory
  • CD compact disk
  • magnetic disk storage or other magnetic storage devices or any other non-transitory medium
  • 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 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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Abstract

L'invention concerne des procédés, des systèmes et des dispositifs destinés à des communications sans fil. Une station de base peut transmettre des informations répétées de commande à un équipement d'utilisateur (UE) à travers de multiples espaces de recherche. La station de base peut transmettre une configuration qui indique des hypothèses de décodage qui prennent en charge la répétition des canaux de commande pour chaque niveau d'agrégation des espaces de recherche. L'UE peut identifier des paires d'hypothèses à partir d'une hypothèse du premier espace de recherche et d'une hypothèse d'un second espace de recherche, en fonction des informations de configuration, les mêmes informations de commande étant transmises dans les deux hypothèses d'une paire d'hypothèses. Cela peut réduire le nombre total de décodages aveugles que l'UE effectue lors de la recherche d'informations répétées de commande. L'UE peut surveiller les espaces de recherche en fonction des informations de configuration, pour recevoir les informations répétées de commande.
PCT/CN2018/107176 2018-09-24 2018-09-24 Conception de signalisation de répétition d'informations de commande Ceased WO2020061722A1 (fr)

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