WO2022082709A1 - Procédé de surveillance aveugle de canal physique de commande de liaison descendante, et appareil de communication - Google Patents

Procédé de surveillance aveugle de canal physique de commande de liaison descendante, et appareil de communication Download PDF

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Publication number
WO2022082709A1
WO2022082709A1 PCT/CN2020/123147 CN2020123147W WO2022082709A1 WO 2022082709 A1 WO2022082709 A1 WO 2022082709A1 CN 2020123147 W CN2020123147 W CN 2020123147W WO 2022082709 A1 WO2022082709 A1 WO 2022082709A1
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blind detection
pdcch
resource
coreset
candidate
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PCT/CN2020/123147
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English (en)
Chinese (zh)
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马蕊香
官磊
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华为技术有限公司
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Priority to PCT/CN2020/123147 priority Critical patent/WO2022082709A1/fr
Priority to CN202080105856.9A priority patent/CN116508282A/zh
Publication of WO2022082709A1 publication Critical patent/WO2022082709A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • the present application relates to the technical field of wireless communication, and in particular, to a method and a communication device for blind detection of a physical downlink control channel (PDCCH).
  • PDCH physical downlink control channel
  • the base station sends the PDCCH to the terminal (user equipment, UE), but the terminal does not know the specific time-frequency resource location of the PDCCH, so the terminal needs to perform blind detection of the PDCCH.
  • the terminal When the terminal performs PDCCH blind detection, it needs to determine the resource location of the candidate PDCCH. Therefore, it first needs to determine the PDCCH blind detection opportunity (PDCCH monitoring occasion), that is, to determine the time domain location of the candidate PDCCH; and the frequency domain location of the candidate PDCCH needs to be determined. That is, to determine the control channel element (CCE) number occupied by the candidate PDCCH; and the allocation of the number of blind detections of the PDCCH needs to be performed to ensure that the terminal is within a certain period of time, such as a time slot (slot) or a blind detection. In the detection time window (span), the number of blind detections performed does not exceed the blind detection capability of the terminal. For example, it is ensured that the number of candidate PDCCH candidates for the terminal to perform blind detection of PDCCH within a certain period of time does not exceed the terminal equipment within the period of time. Maximum number of candidate PDCCHs for blind detection.
  • PDCCH monitoring occasion that is, to determine the time domain location of
  • the communication field has not further pointed out how to allocate the number of PDCCH blind detections in the scenario of repeated PDCCH transmission, so as to ensure that the number of candidate PDCCH candidates for the terminal to perform PDCCH blind detection within a certain period of time does not exceed the terminal within this period of time.
  • the present application provides a method for blind detection of PDCCH and a related communication device, so as to realize blind detection of repeatedly transmitted PDCCH.
  • the present application provides a method for blind detection of PDCCH.
  • the blind detection method may be performed by a communication device, and the communication device may be a terminal device or a chip in the terminal device.
  • the communication device when calculating the number of blind detections of PDCCHs, the communication device records the number of blind detections of N candidate PDCCHs as only one PDCCH blind detection at the first resource location among the multiple resource locations where the N candidate PDCCHs are located. detection, and perform blind detection according to the number of blind detection times of the PDCCH obtained by calculation.
  • N is an integer greater than 1
  • the N candidate PDCCHs are N repetitions of one PDCCH
  • the first resource location is one of the multiple resource locations where the N candidate PDCCHs are located
  • the terminal The number of PDCCH blind detections performed by the device in the first time unit does not exceed the maximum number of candidate PDCCHs that the terminal device can blindly detect in the first time unit
  • the first time unit is one or more PDCCHs including the first resource location.
  • the first time unit may be a time slot or a time window.
  • the resource positions of the candidate PDCCHs include time-domain resource positions and/or frequency-domain resource positions of the candidate PDCCHs.
  • the number of blind detections of the N candidate PDCCHs is only recorded as one PDCCH blind detection at the first resource position among the multiple resource positions where the N candidate PDCCHs are located.
  • the number of blind detections of the PDCCH is recorded in any other resource location except the first resource location among the multiple resource locations, or the communication device does not record the number of blind detections on the N candidate PDCCHs as one of the multiple resource locations.
  • the present application provides a communication apparatus.
  • the communication apparatus may include one or more functional modules for implementing the method in the first aspect, and each functional module may be implemented by means of software and/or hardware.
  • the communication device may include a computing module and a blind detection module.
  • the calculation module can be used to record the number of blind detections of the N candidate PDCCHs as only one PDCCH blind detection at the first resource position in the multiple resource positions where the N candidate PDCCHs are located, and the N candidate PDCCHs are the number of PDCCHs of one PDCCH. N repetitions.
  • the blind detection module is used to perform blind detection according to the number of PDCCH blind detections obtained by calculation, and make the number of times that the terminal device performs blind detection of PDCCH in the first time unit not to exceed the maximum number of blind detections that the terminal device can perform in the first time unit.
  • the number of candidate PDCCHs is used to perform blind detection according to the number of PDCCH blind detections obtained by calculation, and make the number of times that the terminal device performs blind detection of PDCCH in the first time unit not to exceed the maximum number of blind detections that the terminal device can perform in the first time unit.
  • the present application provides a communication apparatus that may include a processor coupled to a memory.
  • the memory is used for storing program codes
  • the processor is used for executing the program codes in the memory to implement the method in the first aspect.
  • the communication device may further include the memory.
  • the communication apparatus may further include a transceiver for communicating with other devices (eg, a base station).
  • a transceiver for communicating with other devices (eg, a base station).
  • the communication device may further include a communication interface for communicating with other devices in the terminal device, for example, for communicating with a transceiver of the terminal device.
  • the present application provides a computer-readable storage medium storing program code for execution by a communication apparatus, the program code including instructions for implementing the method in the first aspect.
  • the present application provides a computer program product comprising instructions which, when run on a communication device, cause the communication device to implement the method of the first aspect.
  • the number of blind detections of multiple candidate PDCCHs that are repeated multiple times as one PDCCH is recorded as one blind detection of one resource location among the multiple resource locations where the multiple candidate PDCCHs are located.
  • the number of detections can realize the accurate calculation of the number of blind detections of the PDCCH by the terminal device, thereby ensuring the reasonable utilization of the blind detection capability of the PDCCH of the terminal device.
  • the multiple resource locations where the N PDCCHs are located may be resource locations in M search spaces (search spaces, SS), where M is an integer less than or equal to N.
  • this blind detection of the PDCCH may be recorded only as the search space in the M search spaces
  • One PDCCH blind detection in the search space with the smallest identification, that is, the first resource position may be the resource position in the search space with the smallest search space identification among the M search spaces.
  • the search space identifier may also be referred to as a search space index.
  • the communication device when M is greater than 1, the communication device does not record this PDCCH blind detection as the PDCCH blind detection in any search space other than the search space with the smallest search space identifier among the M search spaces, that is, the first resource location. It is not a resource location in any search space other than the search space with the smallest search space identification among the M search spaces.
  • the number of blind detections of these N candidate PDCCHs is denoted as a PDCCH blind detection at the resource position in the search space with a smaller search space identifier, because in the process of allocating the number of PDCCH blind detection times, the search with a smaller search space identifier is given priority.
  • the number of blind detections is allocated in space, so the search space with a smaller search space identifier can preferentially ensure blind detection, which can ensure that the terminal device can perform blind detection on the N candidate PDCCHs in time, thereby ensuring the transmission reliability of the PDCCH.
  • the search space with the smallest search space identifier may include Q1 PDCCH blind detection opportunities, where Q1 is a positive integer less than or equal to N.
  • Q1 is equal to 1, that is, when the search space with the smallest search space identifier includes one PDCCH blind detection opportunity, the communication device may record the number of blind detections of the N PDCCHs as one PDCCH blind detection at the PDCCH blind detection opportunity; Q1 is greater than 1, that is, when the search space with the smallest search space identifier includes multiple PDCCH blind detection opportunities, in a possible implementation manner, the number of blind detection times of the N PDCCHs may be recorded as the time in the Q1 PDCCH blind detection opportunities.
  • a blind detection at the last PDCCH blind detection opportunity in the domain, that is, the first resource location is the last PDCCH blind detection opportunity in the time domain among the Q1 PDCCH blind detection opportunities, and Q1 is less than or equal to A positive integer of N.
  • the first resource location may be located at the first PDCCH blind detection opportunity.
  • the PDCCH blind detection opportunity where the first resource location is located is called the first PDCCH blind detection opportunity
  • the time domain position of the first PDCCH blind detection opportunity is located at any other PDCCH among the Q1 PDCCH blind detection opportunities. After the time domain location of the blind detection opportunity.
  • time domain position of the PDCCH blind detection opportunity may be represented by the start symbol or the end symbol in the symbols occupied by the PDCCH.
  • the number of blind detections of these N candidate PDCCHs is recorded as a PDCCH blind detection at the last PDCCH blind detection opportunity in the time domain.
  • the candidate PDCCH is buffered.
  • no blind detection is performed, only in the last blind detection time, all buffered candidate PDCCHs are combined and decoded, so the blind detection times are not calculated in the previous blind detection opportunities, so as to ensure that the number of blind detection times in these blind detection opportunities is guaranteed.
  • the number of blind detections is allocated to other candidate PDCCHs that require more blind detection, and the blind detections of the N PDCCHs are only calculated in the last blind detection opportunity to ensure that the blind detection capability of the terminal device is reasonably utilized.
  • the search space with the smallest search space identifier may be associated with K1 control resource sets (CORESET, control resource set), where K1 is a positive integer less than or equal to N.
  • the control resource set can be simply referred to as the control resource set.
  • K1 is equal to 1, that is, when the search space with the smallest search space identifier is associated with one CORESET, the number of blind detections of the N PDCCHs may be recorded as one PDCCH blind detection in the CORESET.
  • This situation can also be understood as: the number of blind detections of the N PDCCHs is recorded as one PDCCH blind detection in the CORESET with the smallest CORESET identifier among the K1 CORESETs.
  • K1 is greater than 1, that is, when the search space with the smallest search space identifier is associated with multiple CORESETs, the number of blind detections of the N PDCCHs can be recorded as one PDCCH blind detection in the CORESET with the smallest CORESET identifier among the K1 CORESETs, that is, the first
  • the resource location is the resource location in the CORESET with the smallest CORESET identification among the K CORESETs.
  • the CORESET identifier may also be referred to as a CORESET index.
  • the CORESET with the smaller CORESET ID is most likely to be the CORESET with the highest priority, that is, the CORESET with better channel quality
  • the number of blind detections of the N candidate PDCCHs is recorded as a blind detection in the CORESET with the smallest CORESET ID, The reliability of the reception of the PDCCH can be guaranteed.
  • the CORESET with the smallest CORESET identifier may include T1 CCE groups, where T1 is a positive integer.
  • the number of blind detections of the N PDCCHs can be recorded as the number of resource positions occupying the CCE group in the CORESET among the multiple resource positions.
  • the number of blind detections of the N PDCCHs may be recorded as the one with the smallest CCE start identifier in the T1 CCE groups occupied by the multiple resource locations.
  • One PDCCH blind detection at the resource location of the CCE group, that is, the first resource location occupies the CCE group with the smallest CCE start identifier among the T1 CCE groups.
  • the CCE start identifier may also be referred to as a CCE start index.
  • the number of blind detections of the N candidate PDCCHs is recorded as a blind detection at the resource position of the CCE group with the smallest CCE initial identifier.
  • the position of the CCE group is calculated once for blind detection, and other positions are not calculated, which can reduce the blind detection complexity of the terminal device.
  • the first resource location may be the Q2 PDCCH blind detection opportunities
  • a PDCCH blind detection opportunity at the last position in the middle time domain, Q2 is a positive integer less than or equal to N.
  • the first resource location may be among the K2 CORESETs CORESET identifies the resource location in the smallest CORESET, and K2 is a positive integer less than or equal to N.
  • the first resource location may occupy the CCE group with the smallest CCE start identifier among the T2 CCE groups, and T2 is a positive integer .
  • the first resource position occupies the CCEs in the T3 CCE groups. Initially identifies the smallest CCE group, and T3 is a positive integer.
  • FIG. 1 is an exemplary architecture diagram of a communication system according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a PDCCH blind detection opportunity according to an embodiment of the present application
  • FIG. 3 is a schematic interaction diagram of a PDCCH blind detection method according to an embodiment of the present application.
  • FIG. 4 is a schematic interaction diagram of a PDCCH blind detection method according to another embodiment of the present application.
  • FIG. 5 is a schematic diagram of a blind detection time window according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of time domain repetition of PDCCH according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of frequency domain repetition of PDCCH according to an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a PDCCH blind detection method according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a communication device according to another embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a mobile communication system to which the methods and apparatuses of the embodiments of the present application are applied.
  • the mobile communication system includes a core network device 110 , a radio access network device 120 and at least one terminal device (such as the terminal device 130 and the terminal device 140 in FIG. 1 ).
  • the terminal equipment is connected to the wireless access network equipment in a wireless manner, and the wireless access network equipment is connected with the core network equipment in a wireless or wired manner.
  • the core network device and the radio access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device can be integrated on the same physical device, or they can be one physical device. It integrates the functions of some core network equipment and some functions of the wireless access network equipment.
  • Terminal equipment can be fixed or movable.
  • FIG. 1 is only a schematic diagram of a mobile communication system to which the methods and apparatuses of the embodiments of the present application are applied.
  • the embodiments of the present application do not limit the number of core network devices, wireless access network devices, and terminal devices included in the mobile communication system.
  • the mobile communication system to which the method and apparatus of the embodiments of the present application are applied may further include other network devices, for example, a wireless relay device and a wireless backhaul device (not shown in FIG. 1 ).
  • the radio access network equipment can be a base station (base station), an evolved NodeB (eNodeB), a transmission reception point (TRP), a lower-level mobile communication system in the fifth generation ( 5th generation, 5G) mobile communication system.
  • a generation base station (next generation NodeB, gNB), a base station in a future mobile communication system or an access node in a WiFi system, etc.; it can also be a module or unit that completes some functions of a base station, for example, it can be a centralized unit (central unit, CU), or a distributed unit (distributed unit, DU).
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device.
  • wireless access network equipment is referred to as network equipment, and unless otherwise specified, network equipment refers to wireless access network equipment.
  • a terminal device may also be referred to as a terminal, UE, mobile station, mobile terminal, or the like.
  • the terminal equipment can be mobile phone, tablet computer, computer with wireless transceiver function, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminal in industrial control, wireless terminal in unmanned driving, wireless terminal in remote surgery, smart grid wireless terminals in transportation security, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.
  • Network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water; can also be deployed in the air on aircraft, balloons and satellites.
  • the embodiments of the present application do not limit the application scenarios of the network device and the terminal device.
  • the network device and the terminal device can communicate through the licensed spectrum, the unlicensed spectrum, or the licensed spectrum and the unlicensed spectrum at the same time.
  • the network device and the terminal device can communicate through the frequency spectrum below 6 GHz (gigahertz, GHz), and can also communicate through the frequency spectrum above 6 GHz, and can also use the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz for communication at the same time.
  • the embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.
  • the time domain symbols may be orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols, or may be discrete Fourier transform spread spectrum OFDM (Discrete Fourier Transform-spread-OFDM, DFT) symbols -s-OFDM) symbols.
  • OFDM orthogonal frequency division multiplexing
  • DFT discrete Fourier Transform-spread-OFDM
  • the symbols in the embodiments of the present application all refer to time-domain symbols.
  • the physical downlink control channel (PDSCH) and the PDCCH are only examples of the downlink data channel and the downlink control channel.
  • the channel and the control channel may have different names, which are not limited in the embodiments of the present application.
  • the function of the network device may also be performed by a module (eg, a chip) in the network device, or may be performed by a control subsystem including the function of the network device.
  • the control subsystem including network device functions here can be a control center in industrial IoT application scenarios such as smart grid, factory automation, and intelligent transportation.
  • the functions of the terminal device may also be performed by a module (eg, a chip) in the terminal device.
  • the present application takes a base station as an example of a network device and a UE as an example of a terminal device for description.
  • the UE In order to communicate with the base station, the UE needs to establish a wireless connection with a cell controlled by the base station.
  • the cell with which the UE has established a wireless connection is called the serving cell of the UE.
  • the serving cell When the UE communicates with the serving cell, it will also be interfered by signals from neighboring cells.
  • the base station sends downlink signals or downlink information to the UE, and the downlink information is carried on the downlink channel; the UE sends the uplink signal or uplink information to the base station, and the uplink information is carried on the uplink channel.
  • the base station will send the PDCCH to the UE, the PDCCH will schedule the PDSCH, or the downlink control information DCI carried in the PDCCH will indicate a series of related information such as time-frequency resources of the PDSCH.
  • the UE does not know the specific time-frequency resource location of the PDCCH, and needs to perform blind detection of the PDCCH.
  • PDCCH blind detection that is, an attempt is made to decode the DCI carried in the position where the PDCCH may be sent.
  • the PDCCHs that may be sent are called candidate PDCCHs.
  • the UE determines which aggregation levels need to be blindly detected, and where the PDCCH candidate positions of each aggregation level are, so as to determine the resource positions where the PDCCH may be sent; and then assume the format (or number of bits) of a DCI and the corresponding scrambling method.
  • Wireless network temporary identifier radio network temporary identifier, RNTI
  • decode the signal received at the resource location if the decoding is successful, it is determined that there is DCI transmission, and the DCI format and scrambling mode are determined; if the decoding fails , then it is determined that no DCI is sent, and then other DCI formats and scrambling methods are used to try until all aggregation levels that need blind detection and all PDCCH candidate positions are blindly detected.
  • PDCCH blind detection capability refers to the maximum number of candidate PDCCHs that can be blindly detected in one time unit, and/or the maximum number of non-overlapping CCEs.
  • the PDCCH blind detection capability represents the maximum number of candidate PDCCHs that the UE can blindly detect in a period of time, and/or the number of non-overlapping CCEs occupied by the candidate PDCCHs for channel estimation.
  • Slot is a time domain unit. For example, under the normal cyclic prefix, a slot has 14 symbols; under the extended cyclic prefix, a slot has 12 symbols.
  • time domain units in 5G new radio (NR), such as frame, subframe, slot, subslot and symbol.
  • the time length of one frame may be 10 milliseconds (ms), including 10 subframes; the time length corresponding to each subframe is 1 ms.
  • High-level signaling may refer to signaling sent by a high-level protocol layer, which is at least one protocol layer above the physical layer.
  • the high-level protocol layer may specifically include at least one of the following protocol layers: a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (packet data convergence) protocol, PDCP) layer, radio resource control (radio resource control, RRC) layer and non-access stratum (non access stratum, NAS).
  • MAC medium access control
  • RLC radio link control
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • non-access stratum non access stratum
  • Control resource set (control resource set, CORESET): used to indicate the frequency domain location of the physical downlink control channel (PDCCH) and the number of time domain symbols occupied by the PDCCH in the time domain; The number of time domain symbols occupied on the domain can be 1, 2 or 3.
  • the network device may configure different control resource set identifiers for each control resource set in advance, so as to facilitate distinguishing different control resource sets according to different control resource set identifiers. For example, taking the control resource set including control resource set 1 and control resource set 2 as an example, the control resource set identifier of control resource set 1 can be set to p1, and the control resource set identifier of control resource set 2 can be set to p2.
  • the PDCCH may also be described as a candidate PDCCH, which is not limited.
  • Control resource set CORESET group (CORESET group):
  • the network device can send the X1 th indication information to the terminal device, where the X1 th indication information indicates one or more CORESETs, and for each CORESET, the X1 th indication information can include each CORESET
  • the group identifier corresponding to the CORESET group may also be referred to as a control resource set group index (CORESETGroupIndex).
  • the CORESET group may also be called a CORESET pool (pool), therefore, the group ID corresponding to the CORESET group where each CORESET is located may also be called the CORESET Pool Index (CORESETPoolIndex) of the CORESET pool where each CORESET is located.
  • CORESETPoolIndex CORESET Pool Index
  • the terminal device receives the X1 th indication information, so it can determine the group identifier corresponding to the CORESET group to which each CORESET in the multiple CORESETs is located.
  • the candidate values of the group identifier can be 0 to W-1, where W represents that there are several CORESET groups, which are CORESET group 0 to CORESET group W-1 respectively, and W is an integer greater than or equal to 2. Because a CORESET can only belong to one CORESET group, a CORESET group can include multiple CORESETs.
  • the network device has indicated 3 CORESETs for the terminal equipment, and their identities are 1, 2, and 3, respectively.
  • the 3 CORESETs as CORESET1, CORESET2, and CORESET3, respectively, and the group identities indicating them are respectively 0, 1, 1. That is, CORESET1 belongs to CORESET group 0, and both CORESET2 and CORESET3 belong to CORESET group1. If for any CORESET. If the X1-th indication information does not contain the group identifier corresponding to the CORESET, it is considered that the CORESET belongs to CORESET group 0.
  • Each search space set can be associated with a control resource set.
  • the search space set may be a common search space (common search space, CSS) set or a UE-specific search space (UE-specific search space, USS) set; CSS is used for transmission and broadcast control channel (broadcast control channel, BCCH), paging, random access procedure (random access procedure, RAR) and other related cell-level public control information; USS is used to transmit and downlink shared channel (downlink shared channel, DL-SCH), uplink shared channel (uplink shared channel) channel, UL-SCH) and other related UE-level control information.
  • BCCH broadcast control channel
  • RAR random access procedure
  • USS is used to transmit and downlink shared channel (downlink shared channel, DL-SCH), uplink shared channel (uplink shared channel) channel, UL-SCH) and other related UE-level control information.
  • different search space set identifiers may be determined in advance for each search space set, so that different search space sets can be distinguished according to different search space set identifiers. For example, taking the search space set including search space set 1 and search space set 2 as an example, the search space set identifier of search space set 1 can be set to s1, and the search space set identifier of search space set 2 can be set to s2.
  • search space can also be described as a search space (SS), which is not limited. That is to say, “search space” and “search space set” in the embodiments of the present application can be interchanged.
  • Each search space is used to indicate the time domain position where the PDCCH is located, and the configuration information of each search space may include: search space identifier s, associated control resource set identifier p, search space type, search space period, search space offset, Search space mode, aggregation level, and the number of candidate PDCCHs for each aggregation level.
  • the search space identifier may be used to identify the current search space.
  • the associated control resource set identifier may be used to identify the control resource set associated with the current search space.
  • the search space type can be used to indicate that the current search space is CSS or USS.
  • the search space period can be used to indicate the period length corresponding to the current search space.
  • the search space offset may be used to indicate the offset position of the time slot corresponding to the current search space in the time slot corresponding to the search space period.
  • the search space mode can be used to indicate the starting time domain symbol that needs to perform blind PDCCH detection in each time slot corresponding to the current search space.
  • the basic unit of the time-frequency resources occupied by the PDCCH is one CCE, and the resources occupied by the PDCCH are L CCEs.
  • L is called the aggregation level (AL) of the PDCCH.
  • the specific time slot corresponding to the current search space can be determined according to the search space period and the search space offset. Based on the specific time slot corresponding to the current search space, according to the search space mode and the control resource set, the specific time domain symbol occupied by the PDCCH that needs to perform PDCCH blind detection in each time slot corresponding to the current search space can be determined, that is, the search space includes The PDCCH blind detection timing,
  • the time slots include time slot 0, time slot 1, time slot 2 and time slot 3, each time slot includes 14 time domain symbols, and each time slot is indicated by a bit field of 14 bits
  • the search space offset is the second
  • the search space mode is 10001000100000
  • the PDCCH in the control resource set associated with the search space The number of time domain symbols occupied in the time domain is 3.
  • the time slot 1 and time slot 3 corresponding to the current search space can be determined.
  • PDCCH blind detection is performed on the 0-2, 4-6, 8-10 time-domain symbols of slot 1 and slot 3; are the PDCCH blind detection opportunity 1 occupying the 0-2 time domain symbols, the PDCCH blind detection opportunity 2 occupying the 4-6 time domain symbols, and the PDCCH blind detection opportunity 3 occupying the 8-10 time domain symbols; Or it is described that there are 3 candidate PDCCHs in time slot 1 and time slot 3 respectively, which are candidate PDCCH1 occupying the 0-2 time-domain symbols, candidate PDCCH2 occupying the 4-6 time-domain symbols, and occupying the 8th time-domain symbol. - Candidate PDCCH3 for 10 time domain symbols.
  • the network device can also be replaced by a chip in the network device, and the network device and the chip in the network device can be collectively referred to as a network-side communication device; the terminal device can be replaced by a chip in the terminal device, and the terminal device
  • the chips in the terminal equipment and the terminal equipment may be collectively referred to as terminal-side communication devices.
  • the network device determines the PDCCH blind detection capability of the terminal device in one time slot.
  • the protocol in NR Release 15 defines the maximum number of candidate PDCCHs and the maximum number of non-overlapping CCEs that the terminal device can detect blindly in a slot in each carrier. These two maximum numbers are called the PDCCH blindness of the terminal device. Detection capability, or Rel-15 capability.
  • the maximum number of candidate PDCCHs for blind detection refers to the maximum number of blind detections of candidate PDCCHs that can be performed in a slot.
  • An example of the maximum number of blind detection candidate PDCCHs in one slot is shown in Table 1.
  • 2 ⁇ ⁇ 15 kilohertz (kHz) represents the subcarrier spacing, Indicates the maximum number of PDCCH candidates per slot and per serving cell in a slot.
  • the terminal device When the terminal device blindly detects the PDCCH corresponding to the aggregation level, it needs to perform channel estimation first, and then perform PDCCH decoding. Assuming that the aggregation level is 2, channel estimation of 2 CCEs needs to be performed.
  • the maximum number of non-overlapping CCEs refers to the number of CCEs for maximum channel estimation.
  • the PDCCH blind detection capability of the terminal equipment can be limited by limiting the maximum number of CCEs for channel estimation in a time slot. An example of the maximum number of non-overlapping CCEs in one slot is shown in Table 2.
  • 2 ⁇ ⁇ 15 kilohertz (kHz) represents the subcarrier spacing, Indicates the maximum number of non-overlapped CCEs per slot and per serving cell in a slot.
  • the network device can learn the PDCCH blind detection capability of the terminal device in a slot according to the above two tables, that is, the maximum number of candidate PDCCHs and the maximum number of non-overlapping CCEs that the terminal device can blindly detect in a slot.
  • the network device sends the PDCCH based on the PDCCH blind detection capability of the terminal device.
  • the number of candidate PDCCHs sent by the network-side communication device in a time slot does not exceed the maximum number of candidate PDCCHs in a slot known in S301, and the non-overlapping CCEs occupied by the candidate PDCCHs sent in a slot The number of CCEs does not exceed the maximum number of non-overlapping CCEs in a slot known in S301.
  • the terminal device determines the PDCCH blind detection capability of the terminal device in one time slot.
  • the terminal-side communication apparatus may be a terminal device, or may be a chip in the terminal device.
  • the terminal device performs PDCCH blind detection based on the PDCCH blind detection capability of the terminal device in the time slot.
  • the terminal equipment needs to ensure that the number of candidate PDCCHs for actual blind detection does not exceed the corresponding blind detection capability in Table 1, and it needs to ensure that the number of non-overlapping CCEs does not exceed the blind detection capability corresponding to the terminal equipment in Table 2. Test your ability.
  • the number of candidate PDCCHs for the terminal equipment to perform blind detection of PDCCH in one time slot does not exceed the maximum number of candidate PDCCHs for blind detection in one time slot, and the number of PDCCH candidates for the terminal to perform channel estimation in one time slot does not overlap.
  • the number of CCEs does not exceed the maximum number of non-overlapping CCEs in a time slot. As long as one of the number of candidate PDCCHs for blind PDCCH detection and the number of non-overlapping CCEs occupied by candidate PDCCHs for blind detection of PDCCH reaches the corresponding maximum value, the terminal device stops blind detection.
  • the following describes the main steps for the terminal device to perform blind detection based on the blind detection capability in a slot.
  • Step 1 The terminal device determines the PDCCH blind detection opportunity, that is, the time domain position of the PDCCH blind detection.
  • the specific manner of determining the PDCCH blind detection timing is as described above, and will not be repeated here.
  • Step 2 The terminal device determines the position of the candidate PDCCH, that is, the CCE number occupied by the candidate PDCCH.
  • the terminal device After receiving the configuration information sent by the base station, the terminal device can determine the identifier of the CCE occupied by the th candidate PDCCH of the aggregation level L according to the following formula.
  • the terminal device can determine the CCE identifier of each candidate PDCCH for aggregation level L in the CORESET p associated with the search space s according to the above formula. For example, it is determined that the CCE identifiers of the four candidate PDCCH positions of aggregation level 2 are respectively: CCE 0-CCE 1; CCE 2-CCE 3; CCE 4-CCE 5; CCE 6-CCE 7.
  • the terminal device After the terminal device determines the positions of candidate PDCCHs, it needs to perform blind PDCCH detection at these positions. Since the DCI attempt decoding is to be performed, the channel information must be known for decoding, that is, the channel estimation of the CCE at the candidate PDCCH position is required before decoding. If there are multiple candidate PDCCH positions occupying the same CCE, the channel estimation result of the CCE position can be reused, and it is not necessary to perform channel estimation on the CCE every time.
  • the third step the terminal equipment performs the allocation of the number of blind detections, and ensures that the capacity of the terminal equipment is not exceeded.
  • the terminal equipment needs to ensure that the number of candidate PDCCHs and the number of non-overlapping CCEs for blind detection at the timing does not exceed the blind detection capability of the terminal described in the table. That is to say, the number of candidate PDCCHs for the terminal equipment to perform blind detection of PDCCH in one time slot does not exceed the maximum number of candidate PDCCHs for blind detection in one time slot, and the number of PDCCH candidates for the terminal to perform channel estimation in one time slot does not overlap.
  • the number of CCEs does not exceed the maximum number of non-overlapping CCEs in a time slot.
  • the terminal equipment When the terminal equipment performs blind detection of PDCCH based on the blind detection capability of a time slot, firstly, it should ensure that the number of candidate PDCCHs for blind detection does not exceed the maximum number, and secondly, it should ensure that it does not exceed the maximum number of non-overlapping CCEs.
  • the blind detection capability needs to be allocated to each search space.
  • the terminal device Before assigning the number of blind detections, the terminal device needs to determine how many times each search space needs to be blindly detected, that is, how many candidate PDCCHs need to be blindly detected in each search space, specifically including the number of blind detections in the common search space, as well as terminal-specific search space blind detection several times.
  • the specific determination method is to determine the positions of all candidate PDCCHs in each search space according to step 2, and then determine whether each candidate PDCCH position is calculated as a blind detection in the search space.
  • the specific determination method is as follows:
  • the terminal device Before assigning the number of blind detections, the terminal device needs to determine the number of non-overlapping CCEs that require channel estimation for each search space, including the number of non-overlapping CCEs in the common search space and the non-overlapping CCEs in the terminal-specific search space. number.
  • the specific determination method is to determine the positions of all candidate PDCCHs in each search space according to step 2, that is, the CCE identifiers, and then determine whether each CCE is calculated as a non-overlapping CCE.
  • the specific determination method is as follows:
  • the two candidate PDCCHs are from different CORESETs or the time domain start symbols are different.
  • the CCEs they occupy are non-overlapping CCEs.
  • the terminal device After that, the terminal device first allocates the maximum number of candidate PDCCHs that can be blindly detected to the CSS, and then divides the rest according to the ID of the USS in ascending order. If the number of candidate PDCCHs for blind detection is set, the search space and the search space with a larger ID can no longer perform blind detection.
  • the terminal device allocates the largest number of non-overlapping CCEs to the CSS first, and then divides the remaining ones according to the USS ID in ascending order. If the number of non-overlapping CCEs that can be allocated to a USS candidate is insufficient, it needs to be The number of non-overlapping CCEs, then this search space and the search space with a larger ID are no longer blindly detected.
  • the terminal device when the terminal device performs blind detection of PDCCH based on the blind detection capability of a time slot, it needs to ensure that the number of candidate PDCCHs that do not exceed the maximum blind detection and the number of CCEs that do not exceed the maximum number of non-overlapping at the same time.
  • the blind detection time window is simply referred to as a time window (span).
  • the network device may also be replaced by a chip in the network device, and the network device and the chip in the network device may be collectively referred to as a network-side communication device; the terminal device may be replaced by a chip in the terminal device, and the terminal device and the chip in the terminal device The chips can be collectively referred to as terminal-side communication devices.
  • the network device determines the PDCCH blind detection capability of the terminal device in a time window.
  • the NR version (Release) 16 proposes to define the blind detection capability of each time window, and the blind detection capability of each time window is also called the capability of Release 16.
  • a slot can contain multiple time windows, and the total blind detection capability in a slot is increased compared to the blind detection capability of NR Release 15, thus ensuring latency and reliability.
  • the terminal device may report the capability of the terminal device.
  • the minimum interval between the first symbols of each two consecutive time windows is X symbols, except for the last time window of a time slot, the time length of each time window is the Y value reported by the UE and the network device to the terminal device.
  • the density of blind detection occasions that can be configured by the base station can be limited by (X, Y).
  • the maximum number of non-overlapping CCEs for channel estimation in each time window is denoted as C
  • M the maximum number of candidate PDCCHs for blind detection
  • the maximum blind detection capability corresponding to each (X, Y) parameter combination is shown in Table 3 and Table 4.
  • 2 ⁇ ⁇ 15 kilohertz (kHz) represents the subcarrier spacing, Indicates the maximum number of monitored PDCCH candidates per span for combination and per serving cell in a time window.
  • 2 ⁇ ⁇ 15 kilohertz (kHz) represents the subcarrier spacing, Indicates the maximum number of non-overlapped CCEs per span for combination(X,Y) and per serving cell in a time window.
  • the network device After receiving the capability reported by the terminal device, the network device sends configuration information to the UE to configure the PDCCH blind detection parameters.
  • the terminal device can determine the PDCCH blind detection timing according to these blind detection parameters, and the determined PDCCH blind detection timing should meet the reporting capability of the terminal device.
  • the network device sends the PDCCH based on the PDCCH blind detection capability of the terminal device within the time window.
  • the number of candidate PDCCHs sent by the network device in one time window does not exceed the maximum number of candidate PDCCHs in one time window that it learned in S401, and the non-overlapping CCEs occupied by the candidate PDCCHs sent in one time window
  • the number of CCEs does not exceed the maximum number of non-overlapping CCEs in a time window known in S401.
  • the terminal device determines the PDCCH blind detection capability of the terminal device within the time window.
  • the terminal device may determine the PDCCH blind detection capability according to the configuration information received from the network device.
  • the configuration information from the network device indicates 3 CORESETs with time lengths of 1 symbol (1OFDM symbol, 1OS), 2 symbols and 3 symbols respectively.
  • the CORESET of one symbol is associated with two search spaces SS, and the horizontal grid marks the blind detection timing in one of the SSs, which are located in symbols 4 and 11; the blind detection timing in the other SS is in symbol 6.
  • marked with a vertical grid; other blind detection opportunities in the CORESET associated search space SS are marked with a left slash grid and a right slash grid; and the reporting capability of the terminal-side communication device is (2, 2), (4, 3 ) and (7, 3).
  • the following describes an exemplary implementation manner in which the terminal device determines the time window pattern of the actual blind detection according to the configuration information from the network device.
  • the terminal device determines the start symbol position of the span.
  • the start symbol is the start symbol of the occurrence with the most forward position in the time domain among all PDCCH blind detection occurrences.
  • the start symbol is the start symbol of the first occurrence of the CORESET of 2OS in FIG. 5 , that is, symbol 1 .
  • the end device determines the span length. Specifically, the terminal device finds the smallest Y from all reported Ys, finds the largest number of symbols of all CORESETs, and takes the largest value of the two as the span length. For example, taking FIG. 5 as an example, the minimum Y is 2, the maximum number of symbols of CORESET is 3, and the maximum value of the two is 3, so it can be determined that the span length is 3 symbols.
  • start symbol of the next span is the start symbol of the earliest occurrence not included in the previous span, and the length can be determined according to the foregoing method.
  • the span will not cross the boundary of the slot, and the cross-boundary will end from the start symbol to the boundary of the slot, that is to say, the length of the last span can be smaller than the length determined based on the foregoing method.
  • each span is 3 symbols, and the first two spans are separated by 3 symbols (the interval refers to the interval between the start symbols), and the second span and the first two spans are separated by 3 symbols.
  • the three spans are separated by 7 symbols.
  • the span pattern can be the same.
  • the terminal device After the terminal device determines the blind detection time window pattern, it continues to determine the blind detection capability within the time window. For example, if the terminal device reports only one (X, Y), and the blind detection time window finally determined conforms to the reported blind detection capability, the blind detection capability of the time window is the blind detection capability corresponding to the (X, Y) .
  • the blind detection time window conforms to the reported multiple (X, Y) combinations It means that the interval between the start symbols of any two blind detection time windows in the determined blind detection time window is greater than X in multiple (X, Y), then the ability of the finally determined blind detection time window is multiple (X , Y) the maximum value of the blind detection capability corresponding to the combination.
  • the minimum value of the interval between any two spans in the final blind detection time window is 5 symbols, but (7, 3), (4, 3) and (2, 2) are reported, it can be seen that this 5 is greater than 4 and 2 in the reporting capability, that is to say, the determined span satisfies (4, 3) and (2, 2), so the ability to finally determine the blind detection time window is (4, 3) and (2, 2)
  • the maximum value of the corresponding blind detection capability is 5 symbols, but (7, 3), (4, 3) and (2, 2) are reported, it can be seen that this 5 is greater than 4 and 2 in the reporting capability, that is to say, the determined span satisfies (4, 3) and (2, 2), so the ability to finally determine the blind detection time window is (4, 3) and (2, 2)
  • the maximum value of the corresponding blind detection capability is 5 symbols, but (7, 3), (4, 3) and (2, 2) are reported, it can be seen that this 5 is greater than 4 and 2 in the reporting capability, that is to say, the determined span satisfies (4
  • the terminal device performs PDCCH blind detection based on the PDCCH blind detection capability of the terminal device within the time window.
  • the terminal-side communication device needs to ensure that the number of candidate PDCCHs for actual blind detection in each time window does not exceed the corresponding blind detection capability in Table 3, and it needs to ensure that the number of CCEs that do not overlap in each time window. The number does not exceed the blind detection capability of the corresponding terminal in Table 4.
  • the implementation mode of the terminal-side communication device performing PDCCH blind detection based on the PDCCH blind detection capability of the terminal device in the time window is the same as the implementation mode of the terminal-side communication device performing PDCCH blind detection based on the PDCCH blind detection capability of the terminal device in the time slot in S304. Similarly, it is only necessary to replace the time slot in S304 with a time window, which will not be repeated here.
  • the reliability of each channel needs to be guaranteed.
  • the reliability of the PDCCH needs to be guaranteed.
  • multiple PDCCHs may be repeated, that is, the multiple PDCCHs carry exactly the same DCI.
  • the PDCCH can be repeated in the time domain or in the frequency domain.
  • PDCCH time domain repetition means that the PDCCH is repeated in the time domain, for example, the repetition is performed in different PDCCH blind detection occasions in the time domain. These repeated PDCCHs may schedule the same PDSCH, or schedule repetitions of multiple PDSCHs. As shown in FIG. 6 , the PDCCH is repeated at two PDCCH blind detection occasions in the time domain, and these two PDCCHs can schedule two repeated PDSCHs in the time domain.
  • PDCCH frequency domain repetition means that the PDCCH is repeated in the frequency domain, for example, repeated on different resources in the frequency domain. As shown in FIG. 7 , the PDCCH is repeated in two frequency domain positions, and these two PDCCHs can schedule two repeated PDSCHs in the time domain.
  • the two PDCCHs repeated in FIG. 6 or FIG. 7 may belong to two different CORESET groups. For example, one PDCCH is sent in CORESET in CORESET group1 and another PDCCH is sent in CORESET in CORESET group2.
  • the resource location of the N times of repetition of the PDCCH in the embodiments of the present application can also be described as one of the following four ways: Medium; N times PDCCH is in the same SS, but in different PDCCH blind detection opportunities; N times PDCCH is in the same SS, but in different CORESET; N times PDCCH is in the same SS, in the same CORESET , but at a different CCE location. Any one of these four ways can be realized by time domain repetition or frequency domain repetition.
  • N candidate PDCCHs for this PDCCH.
  • the terminal can perform blind detection on the N candidate PDCCHs according to the method shown in FIG. 3 or FIG. 4 .
  • Blind detection is performed on the PDCCH positions, that is, N blind detections are performed on N candidate PDCCH positions. This makes blind detection N times for one PDCCH, thereby increasing the complexity of blind detection. Therefore, when the N candidate PDCCHs are repetitions of the same PDCCH, how to reduce the complexity of the blind detection and rationally utilize the capability of the terminal device is the problem to be solved in the present application.
  • FIG. 8 is an exemplary flowchart of a method for blind PDCCH detection according to an embodiment of the present application.
  • the PDCCH blind detection method in this embodiment of the present application may include S801 and S802.
  • the method is executed by a communication device, and the communication device may be a terminal device or a chip in the terminal device. This communication device may also be referred to as a terminal-side communication device.
  • the communication device records the number of blind detections of the N candidate PDCCHs as only one PDCCH blind detection at the first resource position among the multiple resource positions where the N candidate PDCCHs are located, and the N candidate PDCCHs are N of one PDCCH repetitions, N is an integer greater than 1.
  • the N candidate PDCCHs may be control channels for scheduling URLLC traffic.
  • the terminal equipment can combine the N candidate PDCCHs and decode them together, so that only one blind detection is required for the N candidate PDCCHs, which reduces the complexity of the terminal equipment , the saved blind detection capability can be used for the terminal device to perform blind detection of other PDCCHs, which ensures that the blind detection capability of the terminal device is reasonably utilized.
  • step 3 when the terminal device performs the allocation of the number of blind detections and ensures that the capacity of the terminal device is not exceeded, the terminal device needs to determine the number of blind detections required in each search space. Number of detected candidate PDCCHs.
  • the resource locations of the N candidate PDCCHs may be different.
  • the N candidate PDCCHs are in different SSs, then the number of blind detections of the N candidate PDCCHs should be calculated in which SS, in other words, which resource location should be calculated. become the problem to be solved.
  • the multiple resource locations may belong to different SSs, such as M search spaces, where M is a positive integer less than or equal to N.
  • the communication apparatus may record the number of blind detections of the N candidate PDCCHs as only one blind detection of PDCCHs at the resource positions of the SSs with the smaller SS IDs among the M SSs, that is, the first resource position is the M SSs.
  • the communication apparatus only performs one blind detection in an SS with a relatively small SS ID.
  • the resource location of candidate PDCCH i is in the SS with SS ID 1
  • the resource location of candidate PDCCH j is in the SS with SS ID 2
  • PDCCH i and PDCCH j are the repetition of the same PDCCH
  • the number of blind detections of the PDCCH is not calculated when the number of blind detections of the candidate PDCCH is calculated in SS2
  • the number of blind detections of the PDCCH is only calculated once when the number of blind detections of the candidate PDCCH is calculated in SS1.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs respectively, namely candidate PDCCH1 and candidate PDCCH2, candidate PDCCH1 is in SS1, and candidate PDCCH2 is in SS2, then in step 3 of the method described in FIG. 3 or FIG. 4,
  • the blind detection for the candidate PDCCH2 is not calculated, and when calculating the number of candidate PDCCHs requiring blind detection in SS1, the blind detection for the candidate PDCCH1 is calculated, or, in other words, For the two candidate PDCCHs, only one blind detection is calculated when the number of candidate PDCCHs requiring blind detection in SS1 is calculated.
  • the number of blind detections of the N PDCCHs may be calculated only as the PDCCH blind detection times that are later in the time domain in the Q1 PDCCH blind detection opportunities For one PDCCH blind detection at the detection opportunity, Q1 is a positive integer less than or equal to N.
  • the resource location of PDCCH i in the N candidate PDCCHs is PDCCH blind detection opportunity 1 in SS1
  • the resource location of PDCCH j is PDCCH blind detection opportunity 2 in SS1
  • the time domain location of PDCCH blind detection opportunity 2 is in PDCCH
  • the number of blind detections is not calculated for the PDCCH blind detection opportunity 1 in SS1
  • only one PDCCH blind detection is calculated for the PDCCH blind detection opportunity 2 in SS1.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs, namely candidate PDCCH1 and candidate PDCCH2.
  • the resource location of candidate PDCCH1 is PDCCH blind detection opportunity 1 in SS1
  • the resource location of candidate PDCCH2 is PDCCH blind detection in SS1.
  • step 3 of the method when calculating the number of candidate PDCCHs that need blind detection in SS1, the blind detection for the candidate PDCCH2 is not calculated, and the blind detection for the candidate PDCCH1 is calculated, or in other words, the blind detection in SS1 is calculated.
  • the blind detection in SS1 is calculated.
  • the number of blind detections of the N candidate PDCCHs may only be calculated as the number of times at the resource location in the CORESET with the smaller CORESET ID among the K1 CORESETs.
  • One PDCCH blind detection that is, the first resource location is the resource location in the CORESET with the smallest CORESET identifier among the K1 CORESETs, and K1 is a positive integer less than or equal to N.
  • SS1 is associated with both CORESET 1 and CORESET 2
  • the resource location of candidate PDCCH i is in CORESET 1
  • the resource location of candidate PDCCH j is in CORESET 2
  • CORESET 2 When calculating the number of blind detections of a candidate PDCCH, the number of blind detections of the PDCCH is not calculated, and only one blind detection of the PDCCH is calculated when CORESET 1 calculates the number of blind detections of the candidate PDCCH.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs, namely candidate PDCCH1 and candidate PDCCH2, the resource location of candidate PDCCH1 is in CORESET1 associated with SS1, and the resource location of candidate PDCCH2 is in CORESET2 associated with SS1, then Figure 3 Or in step 3 of the method shown in FIG. 4 , when calculating the number of candidate PDCCHs that need blind detection in SS1, the blind detection for candidate PDCCH2 is not calculated, and the blind detection for candidate PDCCH1 is calculated, or, in other words, for the two candidates PDCCH, when calculating the number of candidate PDCCHs in SS1 that need blind detection, only one blind detection is calculated (in CORESET1 associated with SS1).
  • the number of PDCCH blind detections may be calculated once for the CCE group with the smaller initial CCE ID among the T1 CCE groups, but not for other CCEs Calculate the number of blind PDCCH detections, that is, the first resource position occupies the CCE group with the smallest CCE start ID among the T1 CCE groups, where T1 is a positive integer.
  • one CCE group in CORESET1 includes CCE1 and CCE2
  • another CCE group includes CCE3 and CCE4
  • the resource positions of candidate PDCCH i occupy CCE1 and CCE2
  • the resource positions of candidate PDCCH j occupy CCE3 and CCE4, then for candidate PDCCH i and CCE4
  • the PDCCH blind detection can be calculated only once at CCE1 and CCE2.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs, namely candidate PDCCH1 and candidate PDCCH2.
  • the resource position of candidate PDCCH1 occupies CCE1 and CCE1 in CORESET1 associated with SS1, and the resource position of candidate PDCCH2 occupies CORESET1 associated with SS1.
  • CCE3 and CCE4 then in step 3 of the method described in FIG. 3 or FIG.
  • the multiple resource locations may be Q2 PDCCH blind detection occasions, where Q2 is a positive integer less than or equal to N.
  • the number of blind detections of the N candidate PDCCHs can be calculated as only one PDCCH blind detection at the resource position behind the time domain position in the Q2 PDCCH blind detection times, that is, the first resource position is the Q2 Among the PDCCH blind detection opportunities, a PDCCH blind detection opportunity that is located at the rearmost position in the time domain.
  • candidate PDCCH i among the N candidate PDCCHs is located at PDCCH blind detection opportunity 1
  • candidate PDCCH j among the N candidate PDCCH candidates is located at PDCCH blind detection opportunity 2
  • the time domain position of PDCCH blind detection opportunity 2 is at PDCCH blind detection opportunity After the time domain position of 1, for the N candidate PDCCHs, the number of blind detections is not calculated in the PDCCH blind detection opportunity 1, and only one PDCCH blind detection is calculated at the PDCCH blind detection opportunity 2.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs, namely candidate PDCCH1 and candidate PDCCH2, the resource location of candidate PDCCH1 is PDCCH blind detection opportunity 1, the resource location of candidate PDCCH2 is PDCCH blind detection opportunity 2, and the PDCCH blind detection opportunity
  • the start symbol of opportunity 1 is located after the start symbol of PDCCH blind detection opportunity 2 or the end symbol of PDCCH blind detection opportunity 1 is located after the end symbol of PDCCH blind detection opportunity 2, then step 3 of the method described in FIG. 3 or FIG.
  • the blind detection for candidate PDCCH2 when calculating the number of candidate PDCCHs that need blind detection in SS, the blind detection for candidate PDCCH2 is not calculated, and the blind detection for candidate PDCCH1 is calculated, or, when calculating the number of candidate PDCCHs in SS that need blind detection, the blind detection for candidate PDCCH1 is calculated.
  • the blind detection for candidate PDCCH1 For the two candidate PDCCHs, only one blind detection is calculated in the SS (at PDCCH blind detection timing 1 in the SS).
  • the blind detection of the N candidate PDCCHs may be calculated as the time domain position in the Q2 PDCCH blind detection opportunities.
  • the candidate PDCCH i among the N candidates is located in the PDCCH monitoring occasion1 in SS1
  • the candidate PDCCH j in the N candidate PDCCHs is located in the PDCCH monitoring occasion2 in SS2
  • the time domain position of the PDCCH monitoring occasion2 is located at the time when the PDCCH monitoring occasion1
  • the blind detection of the N candidate PDCCHs may only be calculated as one PDCCH blind detection in SS2, but not as PDCCH blind detection in SS1.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs, namely candidate PDCCH1 and candidate PDCCH2.
  • the resource location of candidate PDCCH1 is PDCCH blind detection opportunity 1 in SS1
  • the resource location of candidate PDCCH2 is PDCCH blind detection in SS2.
  • step 3 of the method when calculating the number of candidate PDCCHs requiring blind detection in SS2, the blind detection for candidate PDCCH2 is not calculated, and when calculating the number of candidate PDCCHs requiring blind detection in SS1, calculating the number of candidate PDCCHs for candidate PDCCH1.
  • Blind detection or in other words, when calculating the number of candidate PDCCHs in SS requiring blind detection, for the two candidate PDCCHs, only one blind detection is calculated in SS1, and no blind detection is calculated in SS2.
  • the blind detection of the N candidate PDCCHs may be calculated as one PDCCH blind detection in the SS.
  • the N candidate PDCCHs may be resource locations in K2 CORESETs, where K2 is a positive integer less than or equal to N.
  • the blind detection of the N candidate PDCCHs can be calculated as only one PDCCH blind detection in the CORESET with the smaller CORESET ID among the K2 CORESETs, and the N candidates are not calculated for the other CORESETs in the K2 CORESETs.
  • the number of blind detections of the PDCCH, that is, the first resource location is the resource location in the CORESET with the smallest CORESET identifier among the K2 CORESETs.
  • candidate PDCCH i among the N candidate PDCCHs is located in CORESET 1
  • candidate PDCCH j among the N candidate PDCCHs is located in CORESET 2
  • no blind detection is calculated in CORESET 2
  • the number of times, only one PDCCH blind detection is calculated in CORESET 1.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs, namely candidate PDCCH1 and candidate PDCCH2, the resource location of candidate PDCCH1 is in CORESET1, and the resource location of candidate PDCCH2 is in CORESET2, then the method described in Figure 3 or Figure 4
  • step 3 when calculating the number of candidate PDCCHs that need blind detection in SS, the blind detection for candidate PDCCH2 is not calculated, but the blind detection for candidate PDCCH1 is calculated, or in other words, the number of candidate PDCCHs that need blind detection in SS is calculated.
  • the blind detection for candidate PDCCH2 is not calculated, but the blind detection for candidate PDCCH1 is calculated, or in other words, the number of candidate PDCCHs that need blind detection in SS is calculated.
  • the two candidate PDCCHs only one blind detection is calculated for the SS (CORESET1 associated with the SS).
  • the blind detection of the N candidate PDCCHs may be calculated as these multiple One PDCCH blind detection among the SSs with the smallest CORESET ID among the K2 CORESETs is associated with one PDCCH blind detection, and the number of blind detections of the N candidate PDCCHs is not calculated for other SSs in the multiple SSs.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs, namely candidate PDCCH1 and candidate PDCCH2, the resource location of candidate PDCCH1 is in CORESET1 associated with SS1, and the resource location of candidate PDCCH2 is in CORESET2 associated with SS2, then Figure 3 Or in step 3 of the method shown in FIG. 4 , when calculating the number of candidate PDCCHs requiring blind detection in SS2, the blind detection for candidate PDCCH2 is not calculated, and when calculating the number of candidate PDCCHs requiring blind detection in SS1, calculating the number of candidate PDCCHs for blind detection. Blind detection of candidate PDCCH1, or in other words, when calculating the number of candidate PDCCHs in SS requiring blind detection, for the two candidate PDCCHs, only one blind detection is calculated in SS1, and no blind detection is calculated in SS2.
  • the blind detection of the N candidate PDCCHs may be recorded as a PDCCH blind detection in the SS.
  • the multiple resource positions occupied by the N candidate PDCCHs may occupy T3 control channel element groups, where T3 is a positive integer.
  • the blind detection of the N candidate PDCCHs may only be recorded as a blind detection of PDCCH at the CCE group with the smallest CCE start ID among the T3 CCE groups, and not for the other CCE groups of the T3 CCE groups.
  • the number of blind detections of the N candidate PDCCHs, that is, the first resource position occupies the CCE group with the smallest CCE start identifier among the T3 CCE groups.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs, namely candidate PDCCH1 and candidate PDCCH2, the resource positions of candidate PDCCH1 occupy CCE1 and CCE1, and the resource positions of candidate PDCCH2 occupy CCE3 and CCE4, then the resource positions of candidate PDCCH1 occupy CCE3 and CCE4, then the resource position of the candidate PDCCH1 is shown in FIG. 3 or FIG. 4 .
  • step 3 of the above method when calculating the number of candidate PDCCHs that need blind detection in the SS, the blind detection for the candidate PDCCH2 is not calculated, but the blind detection for the candidate PDCCH1 is calculated, or in other words, the candidate for blind detection in the SS is calculated.
  • the blind detection for the candidate PDCCH2 is not calculated, but the blind detection for the candidate PDCCH1 is calculated, or in other words, the candidate for blind detection in the SS is calculated.
  • the SS the CCE group where CCE1 and CCE2 in the CORESET associated
  • the blind detection of the N PDCCHs can be recorded as a PDCCH blind detection in the SS; if the CORESET to which the T3 control channel element groups belong is associated with multiple SSs , then the blind detection of the N PDCCHs can only be recorded as a PDCCH blind detection in the first SS among the multiple SSs, and the first SS is the CCE with the smallest CCE start identifier in the T3 control channel element groups.
  • the SS associated with the CORESET is the blind detection of the N PDCCHs.
  • a PDCCH is repeated twice, corresponding to two candidate PDCCHs, namely candidate PDCCH1 and candidate PDCCH2.
  • the resource position of candidate PDCCH1 occupies CCE1 and CCE1 in CORESET1 associated with SS1, and the resource position of candidate PDCCH2 occupies CORESET2 associated with SS2.
  • CCE3 and CCE4 then in step 3 of the method described in FIG. 3 or FIG. 4, when calculating the number of candidate PDCCHs that need blind detection in SS2, the blind detection for candidate PDCCH2 is not calculated for SS2, but is calculated in SS1.
  • CORESET1 and CORESET2 may be the same CORESET.
  • the communication device performs blind PDCCH detection in a first time unit according to the number of PDCCH blind detections calculated for the first resource location, the first time unit includes the first resource location, and the communication device is in the first time unit
  • the number of PDCCH blind detections does not exceed the maximum number of candidate PDCCHs that the terminal device can blindly detect.
  • the blind detection of the PDCCH can be performed according to step 3 described in FIG. 3 , wherein the calculation method of the number of blind detections of each SS can use the calculation method in step S801 to ensure the first The number of PDCCH blind detections performed in a time unit does not exceed the maximum number of candidate PDCCHs that the terminal device can blindly detect.
  • the PDCCH blind detection can be performed according to the third method shown in FIG. 4 , wherein the calculation method of the number of blind detection times of each SS can be calculated by using the calculation method in step S801 to ensure the first The number of PDCCH blind detections performed in a time unit does not exceed the maximum number of candidate PDCCHs that the terminal device can blindly detect.
  • the network device and the terminal device include corresponding hardware structures and/or software modules for performing each function.
  • the units and method steps of each example described in conjunction with the embodiments disclosed in the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software-driven hardware depends on the specific application scenarios and design constraints of the technical solution.
  • FIG. 9 and FIG. 10 are schematic structural diagrams of possible communication apparatuses provided by embodiments of the present application. These communication apparatuses can be used to implement the functions of the terminal-side communication apparatuses in the foregoing method embodiments, and thus can also achieve the beneficial effects of the foregoing method embodiments.
  • the communication apparatus may be the terminal device 130 or the terminal device 140 as shown in FIG. 1 , or may be a module (eg, a chip) applied to the terminal device.
  • the communication device 900 includes a processing unit 901 and a transceiver unit 902 .
  • the communication apparatus 900 is configured to implement the functions of the terminal-side communication apparatus in the method embodiment shown in FIG. 8 above.
  • the processing unit 901 may also be referred to as a processing module 901
  • the transceiving unit 902 may also be referred to as a transceiving module 902 .
  • the processing unit 901 is configured to record the number of blind detections of the N candidate PDCCHs as only the N candidate PDCCHs
  • the N candidate PDCCHs are N repetitions of one PDCCH, and N is an integer greater than 1
  • the transceiver unit 902 is used for the first The number of PDCCH blind detections calculated by the resource location, the PDCCH blind detection is performed in the first time unit, the first time unit includes the first resource location, and the communication device performs the PDCCH in the first time unit
  • the number of blind detections does not exceed the maximum number of candidate PDCCHs that the terminal device can blindly detect.
  • the communication apparatus 1000 includes a processor 1001 and an interface circuit 1002 .
  • the processor 1001 and the interface circuit 1002 are coupled to each other.
  • the interface circuit 1002 can be a transceiver or an input-output interface.
  • the communication apparatus 1000 may further include a memory 1430 for storing instructions executed by the processor 1001 or input data required by the processor 1001 to run the instructions or data generated after the processor 1001 runs the instructions.
  • the processor 1001 is used to implement the function of the above-mentioned processing unit 901
  • the interface circuit 1002 is used to implement the function of the above-mentioned transceiver unit 902 .
  • the terminal device chip When the above communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments.
  • the terminal device chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent by the network device to the terminal device; or, the terminal device chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device antenna) to send information, the information is sent by the terminal equipment to the network equipment.
  • modules such as a radio frequency module or an antenna
  • processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), application-specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • Software instructions may be composed of corresponding software modules, and software modules may be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage medium may reside in an ASIC.
  • the ASIC may be located in a network device or in an end device.
  • the processor and the storage medium may also exist in the network device or the terminal device as discrete components.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer programs or instructions.
  • the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus.
  • the computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits by wire or wireless to another website site, computer, server or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server, data center, or the like that integrates one or more available media.
  • the usable media may be magnetic media, such as floppy disks, hard disks, magnetic tapes; optical media, such as digital video discs; and semiconductor media, such as solid-state drives.
  • “at least one” means one or more, and “plurality” means two or more.
  • “And/or”, which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects are a kind of "or” relationship; in the formula of this application, the character "/” indicates that the related objects are a kind of "division” Relationship.

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

Abstract

La présente demande concerne un procédé de surveillance aveugle d'un canal physique de commande de liaison descendante (PDCCH) et un appareil de communication associé. Dans la solution technique selon la présente demande, lors du calcul du nombre de surveillances aveugles d'un canal PDCCH, un appareil de communication enregistre le nombre de surveillances aveugles de N canaux PDCCH candidats en tant qu'une seule surveillance aveugle de canal PDCCH à un premier emplacement de ressource parmi une pluralité d'emplacements de ressource où les N canaux PDCCH candidats sont situés, et réalise une surveillance aveugle selon le nombre calculé de surveillances aveugles de canaux PDCCH. La solution technique de la présente demande peut mettre en œuvre une surveillance aveugle d'un canal PDCCH transmis de manière répétée et peut garantir une utilisation appropriée d'une capacité de surveillance aveugle de canal PDCCH d'un dispositif de terminal.
PCT/CN2020/123147 2020-10-23 2020-10-23 Procédé de surveillance aveugle de canal physique de commande de liaison descendante, et appareil de communication WO2022082709A1 (fr)

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CN202080105856.9A CN116508282A (zh) 2020-10-23 2020-10-23 物理下行控制信道的盲检测方法和通信装置

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