WO2020113592A1 - Indication de décodage de canal de commande pour communication multi-trp - Google Patents

Indication de décodage de canal de commande pour communication multi-trp Download PDF

Info

Publication number
WO2020113592A1
WO2020113592A1 PCT/CN2018/119940 CN2018119940W WO2020113592A1 WO 2020113592 A1 WO2020113592 A1 WO 2020113592A1 CN 2018119940 W CN2018119940 W CN 2018119940W WO 2020113592 A1 WO2020113592 A1 WO 2020113592A1
Authority
WO
WIPO (PCT)
Prior art keywords
control channel
decoding
trp
decoding configuration
configuration
Prior art date
Application number
PCT/CN2018/119940
Other languages
English (en)
Inventor
Liangming WU
Changlong Xu
Jian Li
Joseph Binamira Soriaga
Jing Jiang
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2018/119940 priority Critical patent/WO2020113592A1/fr
Publication of WO2020113592A1 publication Critical patent/WO2020113592A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • aspects of the present disclosure generally relate to wireless communication, and more particularly, to techniques and apparatuses for control channel decoding indication for multi-transmit-receive point (TRP) communication.
  • TRP multi-transmit-receive point
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and/or the like) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long-Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a new radio (NR) BS, a 5G Node B, and/or the like.
  • New radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • a method of wireless communication may include receiving a decoding configuration over a first control channel, the first control channel being associated with a first transmit-receive point (TRP) of a multi-TRP group, wherein the decoding configuration is for a second control channel associated with a second TRP of the multi-TRP group; and processing signals received over the second control channel based at least in part on the decoding configuration.
  • TRP transmit-receive point
  • a UE for wireless communication may include memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to receive a decoding configuration over a first control channel, the first control channel being associated with a first transmit-receive point (TRP) of a multi-TRP group, wherein the decoding configuration is for a second control channel associated with a second TRP of the multi-TRP group; and process signals received over the second control channel based at least in part on the decoding configuration.
  • TRP transmit-receive point
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a UE, may cause the one or more processors to receive a decoding configuration over a first control channel, the first control channel being associated with a first transmit-receive point (TRP) of a multi-TRP group, wherein the decoding configuration is for a second control channel associated with a second TRP of the multi-TRP group; and process signals received over the second control channel based at least in part on the decoding configuration.
  • TRP transmit-receive point
  • an apparatus for wireless communication may include means for receiving a decoding configuration over a first control channel, the first control channel being associated with a first transmit-receive point (TRP) of a multi-TRP group, wherein the decoding configuration is for a second control channel associated with a second TRP of the multi-TRP group; and means for processing signals received over the second control channel based at least in part on the decoding configuration.
  • TRP transmit-receive point
  • a method of wireless communication may include determining a decoding configuration for a second control channel associated with a second TRP, the first TRP and the second TRP being of a multi-TRP group; and transmitting the decoding configuration over a first control channel associated with the first TRP.
  • a base station for wireless communication may include memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to determine a decoding configuration for a second control channel associated with a second TRP, the first TRP and the second TRP being of a multi-TRP group; and transmit the decoding configuration over a first control channel associated with the first TRP.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a base station, may cause the one or more processors to determine a decoding configuration for a second control channel associated with a second TRP, the first TRP and the second TRP being of a multi-TRP group; and transmit the decoding configuration over a first control channel associated with the first TRP.
  • an apparatus for wireless communication may include means for determining a decoding configuration for a second control channel associated with a TRP, the apparatus and the TRP being of a multi-TRP group; and transmitting the decoding configuration over a first control channel associated with the apparatus.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, TRP, and processing system as substantially described herein with reference to and as illustrated by the accompanying drawings, specification, and appendix.
  • Fig. 1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 2 is a block diagram conceptually illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network, in accordance with various aspects of the present disclosure.
  • UE user equipment
  • Fig. 3 is a diagram illustrating an example of multi-TRP communication, in accordance with various aspects of the present disclosure.
  • Fig. 4 is a diagram illustrating an example of indication of a decoding configuration for one TRP by another TRP, in accordance with various aspects of the present disclosure.
  • Fig. 5 is a diagram illustrating an example of indication of decoding configurations for a multi-TRP group by the TRPs of the multi-TRP group, in accordance with various aspects of the present disclosure.
  • Fig. 6 is a diagram illustrating an example process performed, for example, by a user equipment, in accordance with various aspects of the present disclosure.
  • Fig. 7 is a diagram illustrating an example process performed, for example, by a TRP, in accordance with various aspects of the present disclosure.
  • Fig. 1 is a diagram illustrating a network 100 in which aspects of the present disclosure may be practiced.
  • the network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • Wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit-receive point (TRP) , and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the access network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 Watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet)) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices.
  • Some UEs may be considered a Customer Premises Equipment (CPE) .
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • a frequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Fig. 1 is provided merely as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • CQIs channel quality indicators
  • Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS) ) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • TX transmit
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280. In some aspects, the receive processor 258 may perform these and/or other operations based at least in part on a set of decoding hypotheses, as described in more detail elsewhere herein.
  • Achannel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110.
  • modulators 254a through 254r e.g., for DFT-s-OFDM, CP-OFDM, and/or the like
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with control channel decoding indication for multi-transmit-receive point (multi-TRP) communication, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 600 of Fig. 6, process 700 of Fig. 7, and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • a scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • UE 120 may include means for receiving a decoding configuration over a first control channel, the first control channel being associated with a first transmit-receive point (TRP) of a multi-TRP group, wherein the decoding configuration is for a second control channel associated with a second TRP of the multi-TRP group; means for processing signals received over the second control channel based at least in part on the decoding configuration; means for processing signals received over the second control channel based at least in part on the decoding configuration and based at least in part on successfully decoding the first control channel; means for receiving a first decoding configuration for the first control channel over the second control channel; means for receiving the decoding configuration using a first decoding algorithm; means for processing the signals received over the second control channel using a second decoding algorithm, wherein the second decoding algorithm is a higher-complexity decoding algorithm than the first decoding algorithm; and/or the like.
  • such means may include one or more components of UE 120 described in connection with Fig. 2, Fig. 6, and/
  • base station 110 may include means for determining a decoding configuration for a second control channel associated with a second TRP, the first TRP and the second TRP being of a multi-TRP group; means for transmitting the decoding configuration over a first control channel associated with the first TRP; means for providing, to the second TRP, a first decoding configuration for the first TRP; and/or the like.
  • such means may include one or more components of base station 110 described in connection with Fig. 2, Fig. 6, and/or Fig. 7.
  • Fig. 2 is provided merely as an example. Other examples may differ from what is described with regard to Fig. 2.
  • Fig. 3 is a diagram illustrating an example 300 of multi-TRP communication, in accordance with various aspects of the present disclosure.
  • multiple TRPs 305 may communicate with the same UE 120 in a coordinated manner (e.g., using coordinated multipoint transmissions and/or the like) to improve reliability, increase throughput, and/or the like.
  • the TRPs 305 may coordinate such communications via a backhaul, which may have a smaller delay and/or higher capacity when the TRPs 305 are co-located at the same base station 110 (e.g., different antenna arrays of the same base station 110) or may have a larger delay and/or lower capacity when the TRPs 305 are located at different base stations 110.
  • TRP A and TRP B may be referred to herein as a multi-TRP group.
  • a multi-TRP group may refer to a set of TRPs that are to communicate with the same UE, a set of TRPs managed as a group by an access node controller, a set of TRPs that transmit the same physical downlink shared channel (PDSCH) , a set of TRPs that transmit individual PDSCHs simultaneouslyor contemporaneously, and/or the like.
  • PDSCH physical downlink shared channel
  • a first physical downlink control channel (PDCCH) 310 may schedule communications for TRP A
  • a second PDCCH 315 may schedule communications for TRP B.
  • the communications are PDSCHs, which may be common between TRP A and TRP or may be different (e.g., different payload, different modulation and coding schemes, different transmit powers, different repetition schemes, etc. ) .
  • a first multi-TRP transmission mode e.g., Mode 1
  • a single PDCCH may be used to schedule downlink data communications for a single PDSCH.
  • multiple TRPs 305 may transmit communications to the UE 120 on the same PDSCH.
  • different TRPs 305 may transmit in different (e.g., disjoint) sets of resource blocks (RBs) and/or different sets of symbols.
  • different TRPs 305 may transmit using different layers (e.g., different multiple input multiple output (MIMO) layers) .
  • transmissions on different layers may occur in overlapping resource blocks and/or overlapping symbols.
  • multiple PDCCHs may be used to schedule downlink data communications for multiple corresponding PDSCHs (e.g., one PDCCH for each PDSCH) .
  • a TRP may also be referred to as a BS, an NR BS, a Node B, a 5G NB, an AP, a gNB, or some other term, and/or may be used interchangeably with “cell. ”
  • multiple TRPs may be included in a single BS 110 (e.g., using respective antenna panels or quasi-collocation relationships) .
  • different TRPs may be included in different BSs 110.
  • a TRP may include one or more antenna ports.
  • a set of TRPs (e.g., TRP A and TRP B) may be configured to individually (e.g., using dynamic selection) or jointly (e.g., using joint transmission) serve traffic to a UE 120.
  • TRPs may be coordinated by or cooperative via an access node controller (ANC) .
  • ANC access node controller
  • no inter-TRP interface may be needed or present.
  • Fig. 3 is provided as an example. Other examples may differ from what is described with respect to Fig. 3.
  • a control channel (e.g., a PDCCH and/or the like) may be used to signal downlink control information.
  • a receiver e.g., a UE 120
  • a blind decoding process is performed based on detection hypotheses (e.g., search hypotheses, search candidates, etc. ) .
  • detection hypotheses e.g., search hypotheses, search candidates, etc.
  • blind decoding may be performed based at least in part on a large number of hypotheses. The processing load and time associated with blind decoding may increase as the number of possible hypotheses increases.
  • a UE may communicate with multiple TRPs using a multi-TRP communication scheme, as described above.
  • each TRP of a multi-TRP group may transmit a respective PDCCH to the UE (e.g., for a respective PDSCH of each TRP) .
  • the processing load and time associated with decoding the respective PDCCH may be high (e.g., since each PDCCH may be associated with a large number of decoding hypotheses) .
  • This may be exacerbated by poor channel conditions, which may require the usage of high-reliability decoding schemes, thereby further increasing processing load and time, particularly since multi-TRP communication schemes may be common in poor channel conditions.
  • a first TRP may indicate, to a UE, a decoding configuration for a PDCCH of a second TRP.
  • a decoding configuration may identify, for the PDCCH of the second TRP, a particular decoding hypothesis, a particular aggregation level, a control resource set, a search space, and/or the like.
  • each TRP may signal a decoding configuration for another TRP, thereby improving decoding performance of the UE irrespective of which TRP’s PDCCH is decoded first, as described in more detail below.
  • Fig. 4 is a diagram illustrating an example 400 of indication of a decoding configuration for one TRP by another TRP, in accordance with various aspects of the present disclosure.
  • example 400 includes TRP A (for example, a first TRP) and TRP B (for example, a second TRP) , which may be TRPs 305.
  • TRP A and TRP B may be part of a multi-TRP group in example 400.
  • TRP A may provide a first control channel to the UE 120.
  • the first control channel may include a PDCCH for a shared channel (e.g., a PDSCH) of TRP A.
  • the first control channel is shown as PDCCH A.
  • the first control channel of TRP A may be associated with, may be transmitted with, or may include a decoding configuration.
  • the first control channel of TRP A may include or be associated with information identifying the decoding configuration, such as an indicator, and/or the like.
  • the information identifying the decoding configuration (provided on the first control channel of TRP A) may indicate which decoding configuration is to be used of a plurality of decoding configurations.
  • the UE 120 may be configured with the plurality of decoding configurations.
  • a TRP may indicate which decoding configuration, of the plurality of decoding configurations, is to be used based at least in part on dynamic signaling, semi-static signaling, and/or the like (e.g., using a media access control (MAC) control element (CE) , downlink control information (DCI) , and/or the like) .
  • MAC media access control
  • CE control element
  • DCI downlink control information
  • the decoding configuration may identify a particular decoding candidate to be used to receive a control channel (e.g., based at least in part on an index value associated with the particular decoding candidate, a frequency location of the particular decoding candidate, one or more parameters for the particular decoding candidate, etc. ) .
  • the decoding configuration may identify an aggregation level to be searched for a control channel.
  • the decoding configuration may indicate a particular control resource set, or a particular subset of control resource sets, of the UE that are to be searched to receive a control channel.
  • the decoding configuration may identify a particular search space or a particular set of search spaces to be searched to identify a control channel. Thus, a number of decoding hypotheses and/or a complexity of the search to be performed by the UE 120 may be reduced, thereby conserving processing resources and/or receiver resources of the UE 120.
  • TRP B may provide information indicating the decoding configuration to TRP A (e.g., via a backhaul between TRP A and TRP B) , which may conserve network controller resources in relation to determining the decoding configuration at the network controller.
  • the respective decoding configurations of TRP A and TRP B may be determined by a network controller (for example, network controller 130 of FIG. 2) , an access node controller, and/or the like, which may conserve processing and/or backhaul resources of TRP A and TRP B.
  • TRP A may determine the decoding configuration of TRP B based at least in part on a rule or a configuration (e.g., locally at TRP A) , which may conserve backhaul resources between TRP A and TRP B.
  • information identifying a decoding configuration may be included in a control channel.
  • information identifying a decoding configuration for one control channel may be included in another channel.
  • an indicator may be included in downlink control information (DCI) provided on the control channel and may be encoded into the DCI, thereby improving robustness and security of the indicator.
  • information identifying a decoding configuration for one control channel may be associated with another control channel.
  • the indicator may be appended to the DCI of the other control channel, thereby conserving resources that would otherwise be used to encode the indicator.
  • the UE 120 may receive the decoding configuration for the second control channel over the first control channel.
  • the UE 120 may successfully decode the first control channel and may identify the decoding configuration for the second control channel, for example a PDCCH associated with TRP B as indicated by reference number 420.
  • successfully decoding the first channel may refer to a successful cyclic redundancy check (CRC) pass, a correlation metric that satisfies a threshold after decoding, and/or the like.
  • CRC cyclic redundancy check
  • the UE 120 may receive the second control channel based at least in part on the decoding configuration.
  • the UE 120 may search a particular control resource set, a particular set of control resource sets, a particular search space, a particular set of search spaces, a particular aggregation level, a particular set of aggregation levels, a particular decoding hypothesis, and/or the like, in accordance with the decoding configuration for the second control channel.
  • the UE 120 may conserve resources that would otherwise be used to perform a broader blind search, thereby improving performance of control signaling and reducing receiver resource usage.
  • the decoding configuration received for the second control channel over the first control channel may refer to an indicator indicating the decoding configuration or may refer to information enabling the UE to identify the decoding configuration and may not necessarily refer to the decoding configuration itself.
  • Fig. 4 is provided as an example. Other examples may differ from what is described with respect to Fig. 4.
  • Fig. 5 is a diagram illustrating an example 500 of indication of decoding configurations for a multi-TRP group by the TRPs of the multi-TRP group, in accordance with various aspects of the present disclosure.
  • example 500 includes TRP A and TRP B, which may be TRPs 305.
  • TRP A and TRP B may be part of a multi-TRP group in example 500.
  • TRP A may provide a control channel, illustrated as PDCCH A, as one example.
  • PDCCH A may be associated with a decoding configuration for a control channel that is provided by TRP B (e.g., PDCCH B) .
  • TRP B may provide PDCCH B.
  • PDCCH B may be associated with a decoding configuration for PDCCH A. The provision of information identifying the decoding configurations is described in more detail in connection with Fig. 4, above. Additionally, the signaling or configuration of TRP A and TRP B to determine the respective decoding configurations is described in more detail in connection with Fig. 4, above.
  • the UE 120 may attempt to decode PDCCH A and/or PDCCH B.
  • the UE 120 may use a particular decoding algorithm to decode PDCCH A and/or PDCCH B.
  • the UE 120 may use a lower-complexity algorithm to decode one of PDCCH A and/or PDCCH B before a decoding configuration is identified, and the UE 120 may use a higher-complexity algorithm to decode a remaining control channel (the other of PDCCH A or PDCCH B) once a decoding configuration for the remaining control channel is identified.
  • the UE 120 may use a polar coding algorithm with a smaller list size (e.g., which may be considered as a lower-complexity algorithm) to attempt to decode one of PDCCH A and/or PDCCH B, and may use a polar coding algorithm with a larger list size (e.g., which may be considered as a higher-complexity algorithm) to attempt to decode the remaining control channel (the other of PDCCHA or PDCCH B) in accordance with the decoding configuration for the remaining control channel.
  • the UE 120 may improve decoding robustness when a decoding configuration has not yet been identified and may improve decoding performance or speed when a decoding configuration has been identified.
  • the usage of different-complexity decoding algorithms before a decoding configuration is determined and after the decoding configuration is determined may be performed in connection with Fig. 4, above.
  • the UE 120 may successfully decode (e.g., receive) PDCCH B, as described in more detail in connection with Fig. 4, above.
  • the UE 120 may determine the decoding configuration for PDCCH A based at least in part on PDCCH B.
  • the UE 120 decodes PDCCH B before PDCCH A, so the UE 120 determines the decoding configuration for PDCCH A based at least in part on PDCCH B.
  • PDCCH B can be a first control channel and PDCCH A can be a second control channel where the decoding configuration for the second control channel is determined based at least in part on the first control channel.
  • PDCCH A can be a first control channel
  • PDCCH B can be a second control channel
  • the UE 120 may receive PDCCH A based at least in part on the decoding configuration for PDCCH A. For example, the UE 120 may perform a blind search for PDCCH A based at least in part on the decoding configuration for PDCCH A. As another example, the UE 120 may use a higher-complexity detection algorithm for PDCCH A than was used for PDCCH B.
  • the UE 120 may decode a first control channel (e.g., one of PDCCH A and/or PDCCH B) using a lower-complexity detection algorithm, and may decode a second control channel (e.g., the other of PDCCH A and/or PDCCH B) using a higher-complexity algorithm and using a decoding configuration for the second control channel that is received on the first control channel.
  • a first control channel e.g., one of PDCCH A and/or PDCCH B
  • a second control channel e.g., the other of PDCCH A and/or PDCCH B
  • efficiency of detecting one control channel using a decoding configuration received on another control channel is improved, thereby increasing the efficiency and usability of multi-TRP communications and reducing UE receiver, processor, and battery resource consumption.
  • a multi-TRP group of any number of TRPs may provide one or more indicators of decoding configurations.
  • all TRPs of the multi-TRP group may provide indications for all other TRPs of the multi-TRP group.
  • a TRP may provide one or more indications for one or more other TRPs of the multi-TRP group.
  • TRP A may provide TRP B’s decoding configuration
  • TRP B may provide TRP C’s decoding configuration, and so on.
  • TRP A and TRP B may provide each other’s decoding configurations
  • TRP C and TRP D may provide each other’s decoding configurations, and so on.
  • other mappings of decoding configurations to control channels/TRPs are contemplated herein.
  • Fig. 5 is provided as an example. Other examples may differ from what is described with respect to Fig. 5.
  • Fig. 6 is a diagram illustrating an example process 600 related to a method of wireless communication performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 600 is an example where a UE (e.g., UE 120) performs decoding of a control channel based at least in part on a decoding configuration of the control channel received from a different TRP than the control channel.
  • a UE e.g., UE 120
  • process 600 may include receiving a decoding configuration over a first control channel, the first control channel being associated with a first transmit-receive point (TRP) of a multi-TRP group, wherein the decoding configuration is for a second control channel associated with a second TRP of the multi-TRP group (block 610) .
  • the UE e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, and/or the like
  • the first control channel may be associated with (e.g., transmitted by) a first TRP of a multi-TRP group.
  • the decoding configuration may be for a second control channel associated with (e.g., transmitted by) a second TRP of the multi-TRP group.
  • process 600 may include processing signals received over the second control channel based at least in part on the decoding configuration (block 620) .
  • the UE e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, and/or the like
  • the UE may receive the second control channel based at least in part on the decoding configuration.
  • the UE may decode the second control channel based at least in part on the decoding configuration.
  • the UE may perform a blind search for the second control channel based at least in part on the decoding configuration.
  • the UE may receive a first shared channel based at least in part on the first control channel. In some aspects, the UE may receive a second shared channel based at least in part on the second control channel.
  • processing the signals received over the second control channel may include demodulating, filtering, amplifying, downconverting, OFDM processing, decoding, and/or the like.
  • processing the signals received over the second control channel may include processing the second control channel using a particular decoding hypothesis; searching for information on the second control channel at a particular aggregation level, search space, and/or control resource set; and/or the like.
  • Process 600 may include additional aspects, such as any single aspect and/or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the decoding configuration indicates an aggregation level for the second control channel. In some aspects, the decoding configuration indicates a decoding hypothesis to be used to receive the second control channel. In some aspects, the decoding configuration indicates a proper subset of decoding hypotheses to be used to receive the second control channel. In some aspects, the decoding configuration indicates a control resource set for the second control channel. In some aspects, the control resource set is one of a plurality of control resource sets configured for the UE.
  • the decoding configuration indicates a search space for the second control channel.
  • the search space is one of a plurality of search spaces configured for the UE.
  • information indicating the decoding configuration is included in downlink control information received on the first control channel. In some aspects, information indicating the decoding configuration is appended to downlink control information received on the first control channel.
  • processing the signals received over the second control channel based at least in part on the decoding configuration further comprises processing the signals received over the second control channel based at least in part on the decoding configuration and based at least in part on successfully decoding the first control channel.
  • the decoding configuration is a second decoding configuration.
  • the UE may receive a first decoding configuration for the first control channel over the second control channel.
  • receiving the decoding configuration over the first control channel further comprises receiving the decoding configuration using a first decoding algorithm; and processing the signals received over the second control channel based at least in part on the decoding configuration further comprises processing the signals received over the second control channel using a second decoding algorithm, wherein the second decoding algorithm is a higher-complexity decoding algorithm than the first decoding algorithm.
  • process 600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 6. Additionally, or alternatively, two or more of the blocks of process 600 may be performed in parallel.
  • Fig. 7 is a diagram illustrating an example process 700 related to a method of wireless communication performed, for example, by a TRP, in accordance with various aspects of the present disclosure.
  • Example process 700 is an example where a first TRP (e.g., BS 110, TRP 305, etc. ) performs indication of a decoding configuration for a second TRP (e.g., BS 110, TRP 305, etc. ) .
  • a first TRP e.g., BS 110, TRP 305, etc.
  • a second TRP e.g., BS 110, TRP 305, etc.
  • process 700 may include determining a decoding configuration for a second control channel associated with a second TRP, the first TRP and the second TRP being of a multi-TRP group (block 710) .
  • the first TRP e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240, communication unit 244, and/or the like
  • the first TRP and the second TRP may be of a multi-TRP group.
  • process 700 may include transmitting the decoding configuration over a first control channel associated with the first TRP (block 720) .
  • the first TRP e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like
  • the first control channel may be associated with the first TRP.
  • Process 700 may include additional aspects, such as any single aspect and/or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the decoding configuration indicates an aggregation level for the second control channel. In some aspects, the decoding configuration indicates a decoding hypothesis to be used to process signals received over the second control channel. In some aspects, the decoding configuration indicates a proper subset of decoding hypotheses to be used to process signals received over the second control channel. In some aspects, the decoding configuration indicates a control resource set for the second control channel. In some aspects, the decoding configuration indicates a search space for the second control channel. In some aspects, information indicating the decoding configuration is included in downlink control information transmitted over the first control channel. In some aspects, information indicating the decoding configuration is appended to downlink control information received on the first control channel. In some aspects, the decoding configuration is a second decoding configuration. The first TRP may provide, to the second TRP, a first decoding configuration for the first TRP.
  • process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 7. Additionally, or alternatively, two or more of the blocks of process 700 may be performed in parallel.
  • ком ⁇ онент is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software.
  • satisfying a threshold may refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .

Landscapes

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

Abstract

Selon divers aspects, la présente invention concerne de manière générale la communication sans fil. Selon certains aspects, un équipement utilisateur peut recevoir une configuration de décodage sur un premier canal de commande, le premier canal de commande étant associé à un premier point de transmission-réception (TRP) d'un groupe multi-TRP, la configuration de décodage étant destinée à un second canal de commande associé à un second TRP du groupe multi-TRP ; et recevoir le second canal de commande sur la base, au moins en partie, de la configuration de décodage. L'invention concerne de nombreux autres aspects.
PCT/CN2018/119940 2018-12-07 2018-12-07 Indication de décodage de canal de commande pour communication multi-trp WO2020113592A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/119940 WO2020113592A1 (fr) 2018-12-07 2018-12-07 Indication de décodage de canal de commande pour communication multi-trp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/119940 WO2020113592A1 (fr) 2018-12-07 2018-12-07 Indication de décodage de canal de commande pour communication multi-trp

Publications (1)

Publication Number Publication Date
WO2020113592A1 true WO2020113592A1 (fr) 2020-06-11

Family

ID=70974007

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/119940 WO2020113592A1 (fr) 2018-12-07 2018-12-07 Indication de décodage de canal de commande pour communication multi-trp

Country Status (1)

Country Link
WO (1) WO2020113592A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150296542A1 (en) * 2011-08-11 2015-10-15 Blackberry Limited Performing random access in carrier aggregation
WO2017197125A1 (fr) * 2016-05-11 2017-11-16 Convida Wireless, Llc Nouveau canal de commande de liaison descendante radio
US20170367046A1 (en) * 2016-06-21 2017-12-21 Samsung Electronics Co., Ltd Transmissions of physical downlink control channels in a communication system
US20180192405A1 (en) * 2017-01-05 2018-07-05 Huawei Technologies Co., Ltd. Method for Downlink Control Channel Design
US20180279273A1 (en) * 2017-03-24 2018-09-27 Mediatek Inc. Downlink Control Signal Design In Mobile Communications

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150296542A1 (en) * 2011-08-11 2015-10-15 Blackberry Limited Performing random access in carrier aggregation
WO2017197125A1 (fr) * 2016-05-11 2017-11-16 Convida Wireless, Llc Nouveau canal de commande de liaison descendante radio
US20170367046A1 (en) * 2016-06-21 2017-12-21 Samsung Electronics Co., Ltd Transmissions of physical downlink control channels in a communication system
US20180192405A1 (en) * 2017-01-05 2018-07-05 Huawei Technologies Co., Ltd. Method for Downlink Control Channel Design
US20180279273A1 (en) * 2017-03-24 2018-09-27 Mediatek Inc. Downlink Control Signal Design In Mobile Communications

Similar Documents

Publication Publication Date Title
EP3718344B1 (fr) Techniques et appareils pour fournir des mises à jour d'informations de système dans un système à l'aide de parties de bande passante
WO2021168597A1 (fr) Association de ports de signal de référence de suivi de phase et de ports de signal de référence de démodulation pour répétitions de liaison montante multifaisceaux
US20210195579A1 (en) Pdcch monitoring reduction for reduced-capability user equipments
US10901478B2 (en) Performing a power saving operation based on a received power saving signal and power saving signal configuration
WO2021159362A1 (fr) Groupage dans le domaine temporel de signaux de référence de démodulation
US20200059939A1 (en) Cross-carrier scheduling for bandwidth parts
US11588595B2 (en) Sounding reference signal and downlink reference signal association in a power saving mode
WO2021226861A1 (fr) Configurations de liaison montante multiples pour transmissions de panneaux d'antenne multiples
US11153873B2 (en) Resolving time-domain resource allocation ambiguity
WO2021072619A1 (fr) Informations améliorées de relation spatiale de canal physique de commande de liaison montante dans un ce de mac
US11641649B2 (en) Transmission of a beam failure recovery request via a secondary cell used for carrier aggregation
US11652530B2 (en) Beam failure detection reference signal selection for secondary cells
WO2019157762A1 (fr) Techniques et appareils de détermination d'état de canal ou de signalisation de référence à préemption de trafic
WO2021120083A1 (fr) Indication de faisceau pour transmission par liaison latérale programmée d'informations de commande de liaison descendante
US20210235307A1 (en) Techniques for indicating beams for user equipment beam reporting
US11606127B2 (en) Techniques for sidelink channel state information reporting
WO2021253262A1 (fr) Traitement d'informations de commande de liaison descendante à deux étages
WO2020057581A1 (fr) Gestion d'interférence à distance à l'aide d'un signal de balise
WO2020113592A1 (fr) Indication de décodage de canal de commande pour communication multi-trp
US11924837B2 (en) Techniques for physical uplink control channel beam failure recovery reselection
WO2021114157A1 (fr) Configuration de signal périodique de dispositif à dispositif
WO2021007830A1 (fr) Conception de demande de répétition automatique hybride avec protection inégale contre les erreurs

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18942147

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18942147

Country of ref document: EP

Kind code of ref document: A1