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WO2022151457A1 - 一种多trp系统中tci状态的配置方法 - Google Patents

一种多trp系统中tci状态的配置方法 Download PDF

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Publication number
WO2022151457A1
WO2022151457A1 PCT/CN2021/072354 CN2021072354W WO2022151457A1 WO 2022151457 A1 WO2022151457 A1 WO 2022151457A1 CN 2021072354 W CN2021072354 W CN 2021072354W WO 2022151457 A1 WO2022151457 A1 WO 2022151457A1
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WO
WIPO (PCT)
Prior art keywords
tci state
pdcch
coreset
tci
receive
Prior art date
Application number
PCT/CN2021/072354
Other languages
English (en)
French (fr)
Inventor
黎添
生嘉
Original Assignee
捷开通讯(深圳)有限公司
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 捷开通讯(深圳)有限公司 filed Critical 捷开通讯(深圳)有限公司
Priority to US18/261,570 priority Critical patent/US20240089984A1/en
Priority to PCT/CN2021/072354 priority patent/WO2022151457A1/zh
Priority to CN202180091011.3A priority patent/CN116848793A/zh
Priority to EP21918660.8A priority patent/EP4280741A4/en
Publication of WO2022151457A1 publication Critical patent/WO2022151457A1/zh

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    • 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
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • 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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • 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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • 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 signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation

Definitions

  • the disclosed embodiments of the present invention relate to the field of communication technologies, and more particularly, to a method and user equipment for configuring a TCI state in a multi-TRP system.
  • UE User Equipment
  • PDCCH Physical Downlink Control Channel
  • NR New Radio
  • the frequency domain resource information of the PDCCH and the number of orthogonal frequency division multiplexing (OFDM: Orthogonal Frequency Division Multiplexing) symbols occupied in the time domain are encapsulated in the control resource set (CORESET: Control Resource Set), the PDCCH starting OFDM symbol, monitoring period, associated CORESET and other information are encapsulated in a search space (Search Space, SS).
  • CORESET Control Resource Set
  • Search Space Search Space
  • these candidate resources are called PDCCH candidates.
  • CRC check passes, it means that the current candidate PDCCH is successfully demodulated.
  • PDCCH Physical Downlink shared channel
  • PUSCH Physical Uplink Share Channel
  • Enhancement of PDCCH transmission in multi-TRP systems under SFN supports the association of one PDCCH candidate with two TCI states of CORESET in one search space set, but only one TCI is configured in one CORESET in the existing protocol state, and a PDCCH candidate is associated with only one TCI state. Therefore, when a CORESET configures two TCI states, it is necessary to propose a method to define the configuration and use of the two TCI states.
  • the present invention provides a TCI state configuration method in a multi-TRP system to solve the above technical problem.
  • a method for configuring a TCI state in a multi-TRP system includes: acquiring a PDCCH according to a monitored search space and a corresponding control resource set CORESET, and configuring the CORESET with one activated TCI state or There are 2 activated TCI states, each activated TCI state includes parameters related to the transmit beam, and the UE receives the PDCCH through the receive beam corresponding to the TCI state.
  • a user equipment includes a processor and a communication circuit, the processor is connected to the communication circuit; the processor is configured to execute the configuration method according to the first aspect.
  • a user equipment where an instruction is stored in the user equipment, and when the instruction is executed, the configuration method described in the first aspect is implemented.
  • the present application receives the PDCCH according to the monitored search space and the corresponding control resource set CORESET configuration information, and each CORESET can be configured with 1 activated TCI state or 2 activated TCI states, each activated
  • the TCI state includes parameters related to the transmit beam, so that the UE can flexibly use the receive beam corresponding to one active TCI state or the receive beam corresponding to two active TCI states to receive the PDCCH according to the implementation situation.
  • FIG. 1 is a schematic diagram of the transmission principle of the PDCCH channel in a multi-TRP system
  • FIG. 2 is a schematic diagram of the definition of a MAC control element field according to an embodiment of the TCI state configuration method of the present application;
  • FIG. 3 is a schematic diagram of receiving a resource unit grouping according to an embodiment of the TCI state configuration method of the present application
  • FIG. 4 is a schematic diagram of receiving a resource unit grouping according to another embodiment of the TCI state configuration method of the present application.
  • FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of a method for configuring a TCI state of the present application
  • FIG. 6 is a storage schematic diagram of a user equipment performing an embodiment of a TCI state configuration method according to the present application.
  • the present application provides a method for configuring a TCI state in a multi-TRP system.
  • This configuration method includes:
  • the CORESET configures one active transmission configuration indicating TCI state or two active TCI states, each of the active TCI states includes transmission beam related information parameter, the UE receives the PDCCH through the receiving beam corresponding to the TCI state.
  • CORESET includes information such as frequency domain resource information of PDCCH and the number of OFDM symbols occupied in time domain.
  • the search space includes PDCCH starting OFDM symbol, monitoring period, associated CORESET and other information.
  • CORESET includes PDCCH frequency domain resource information and time domain occupied information. Information such as the number of OFDM symbols.
  • the UE obtains search space information and CORESET information through Radio Resource Control (RRC). Further, PDCCH related information is acquired through the search space information and the information configuration of the CORESET.
  • RRC Radio Resource Control
  • the CORESET also includes the configuration of the TCI state.
  • the base station configures a series of TCI states for a CORESET through the parameter tci-States-ToAddModList under the high-level parameter ControlResourceSet, and is indicated by the UE-level PDCCH TCI state.
  • the MAC layer control unit (MAC CE: MAC Control Element) activates a TCI state specifically used by this CORESET.
  • MAC CE MAC Control Element
  • Each activated TCI state includes parameters related to the transmit beam, such as specific direction parameters of the transmit beam, and the UE can receive the PDCCH by using the receive beam corresponding to the TCI state.
  • CORESET configures 1 activated TCI state or 2 activated TCI states, which are respectively indicated by different MAC control elements MAC CE.
  • the original MAC CE format can be used to indicate a TCI state of a CORESET
  • a new MAC CE can be defined to indicate that a CORESET activates two TCI states. Therefore, when a CORESET only needs to activate one TCI state, the original MAC CE is used for indication, and when a CORESET needs to activate two TCI states, the newly defined MAC CE is used for indication. Since different MAC CEs have different signaling overheads, different MAC CEs apply to different scenarios, which can save signaling overheads.
  • the field Serving Cell ID is used to indicate the serving cell that uses this MAC CE, and the length of this field is 5 bits.
  • the field CORESET ID represents a control resource set identifier, which is indicated by the high-level parameter controlResourceSetId, indicating the CORESET using this TCI state.
  • the length of this field is 4 bits. If the value of this field is 0, this CORESET is configured by the high-level parameter controlResourceSetZero; field TCI State ID1 and TCI State ID2 represent the two TCI states activated by this CORESET, which are indicated by the high-level parameter TCI-StateId. The length of these two fields is 7 bits.
  • these two TCI states It is the two TCI states in the first 64 TCI states of the parameters tci-States-ToAddModList and tci-States-ToReleaseList under the high-level parameter PDSCH-Config. If the field CORESET ID value is not 0, these two TCI states are the high-level parameter controlResourceSet The two TCI states in the following parameters tci-StatesPDCCH-ToAddList and tci-StatesPDCCH-ToReleaseList.
  • the CORESET configuration of the 1 activated TCI state or the 2 activated TCI states is indicated using the same MAC CE.
  • a new MAC CE can be defined, and one bit of the MAC CE can be used to indicate that the MAC CE is a TCI state or two TCI states used to activate a CORESET. For scheduling, it is relatively simple, and there is no need to distinguish different activations. Different MAC CEs are used for the number of TCI states.
  • this newly defined MAC can refer to the field definition shown in Figure 2, and the reserved field R can be used to indicate that the MAC CE is one TCI state or two TCI states for activating one CORESET, and other fields can be used in the same way as above.
  • the length of the reserved field R is 1 bit, which is used to indicate that the current MAC CE is used to activate one TCI state or two TCI states of the CORESET. Specifically, if the value of the field R is 0, it means that the current MAC CE is used to activate the CORESET. A TCI state, if the value of field R is 1, it means that the current MAC CE is used to activate the two TCI states of this CORESET, and vice versa.
  • the TCI state indicated in the field TCI State ID1 is used; when the MAC CE is two TCI states for activating the CORESET, the MAC CE uses two fields for To indicate two TCI states, namely: TCI states indicated by fields TCI State ID1 and TCI State ID2, the index values of these two TCI states are indicated by the high-level parameter TCI-StateId.
  • the TCI state indicated by TCI State ID1 and TCI State ID2 is the TCI state in the first 64 TCI states of the parameters tci-States-ToAddModList and tci-States-ToReleaseList under the high-level parameter PDSCH-Config.
  • the TCI state indicated by TCI State ID1 and TCI State ID2 is the TCI state in the parameters tci-StatesPDCCH-ToAddList and tci-StatesPDCCH-ToReleaseList under the high-level parameter controlResourceSet.
  • the UE receives the PDCCH through the receiving beam corresponding to the TCI state and further includes:
  • S110 Divide the frequency domain resources of the PDCCH candidates (Candidate) into two groups according to resource units, which are the first group of PDCCH candidate resources and the second group of PDCCH candidate resources respectively.
  • the UE receives PDCCH candidates in the frequency domain.
  • a PDCCH candidate is composed of several frequency domain resource units (ie: REG/REG bundle/CCE/RB).
  • the frequency domain resource units can be REG (Resource Element Group), REG bundle. , CCE (Control Channel Element), RB (Resource Block).
  • the frequency domain resources of the PDCCH candidates can be divided into two groups according to the odd and even numbers of the resource unit index values. When the resource unit index value is an odd number, it is the first group of PDCCH candidate resources, and when the resource unit index value is an even number, it is the second group of PDCCH candidate resources.
  • the resource unit index value when the resource unit index value is an even number, it may be the first group of PDCCH candidate resources, and when the resource unit index value is an odd number, it may be the second group of PDCCH candidate resources.
  • the frequency domain resources of the PDCCH candidates can also be divided into two groups according to the size of the resource unit index value.
  • the first half of the resource unit index value is the first group of PDCCH candidate resources
  • the second half of the resource unit index value is the second group of PDCCH candidate resources.
  • the second half of the resource unit index value may be the first group of PDCCH candidate resources
  • the first half of the resource unit index value may be the second group of PDCCH candidate resources.
  • the first receiving beam corresponding to one of the activated TCI states is used to receive the first group of PDCCH candidate resources, and then the second receiving beam corresponding to the second activated TCI state is used to receive the second group of PDCCH candidate resources.
  • the UE first uses the first receive beam to monitor on resource units #0&#2&#4&#6, and then uses the second receive beam to monitor on resource unit #0&#2&#4&#6 Monitor on #1&#3&#5&#7.
  • the UEs are grouped in order of the size of the resource unit index value, and the UE first uses the first receive beam to monitor on resource units #0&#1&#2&#3, and then uses the second receive beam to monitor the resource unit #0&#1&#2&#3. Monitoring on resource units #4&#5&#6&#7.
  • the UE after the UE receives the PDCCH through the receiving beam corresponding to the TCI state, it may further include: when the scheduling time between the PDCCH and its scheduled physical downlink shared channel PDSCH is less than a threshold value, the UE uses the default TCI state. The corresponding receive beam performs PDSCH reception.
  • the threshold value is configured by the high-level parameter timeDurationForQCL.
  • the PDSCH cannot use the TCI state configured by the PDCCH that schedules the PDSCH, only The parameters corresponding to the default TCI state can be used.
  • the default TCI state is the TCI state corresponding to the CORESET with the smallest index value among the CORESET monitored in the previous time slot, namely: PDCCH
  • the receive beam corresponding to the same TCI state is used for the PDSCH channel during this time period.
  • the default TCI states can be divided into the following situations:
  • the TCI state with the smallest index value among the TCI states activated by the CORESET with the smallest index value among the CORESETs monitored in the previous time slot is used as the default TCI state, and the UE uses the receive beam corresponding to the default TCI state.
  • PDSCH is received.
  • the CORESET may be divided into two groups in the frequency domain according to the index value of the resource unit REG/REG bundle/CCE, and each group uses one TCI state to monitor the PDCCH candidates.
  • the TCI state corresponding to the resource unit with the smallest index value among the resource units corresponding to the CORESET monitored in the previous time slot is taken as the default TCI state, and the UE uses the receiving beam corresponding to the default TCI state to receive the PDSCH.
  • the CORESET may be divided into two groups in the time domain according to the OFDM (Orthogonal Frequency Division Multiplexing) symbol index value, and each group uses one TCI state to monitor PDCCH candidates.
  • the TCI state corresponding to the OFDM symbol with the smallest index value among the OFDM symbols corresponding to the CORESET monitored in the previous time slot is taken as the default TCI state, and the UE uses the receiving beam corresponding to the default TCI state to receive the PDSCH.
  • the two activated TCI states of the CORESET with the smallest index value in the CORESET monitored in the previous time slot are used as the two default TCI states, and the UE uses two TCI states.
  • the two receiving beams corresponding to the default TCI state respectively receive two PDSCHs of two TRPs.
  • the present application further provides a user equipment, which is used for performing the above-mentioned configuration method of the TCI state.
  • the user equipment 10 includes a processor 12 and a communication circuit 11 ; the processor 12 is connected to the communication circuit 11 , and the processor 12 is configured to execute instructions to implement the above-mentioned method for configuring the TCI state.
  • the processor 12 may also be referred to as a CPU (Central Processing Unit, central processing unit).
  • the processor 12 may be an integrated circuit chip with signal processing capability.
  • Processor 12 may also be a general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components .
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general purpose processor may be a microprocessor or the processor 12 may be any conventional processor or the like.
  • FIG. 6 is a schematic diagram of a storage structure of a user equipment in an embodiment of the present application.
  • the user equipment 20 in this embodiment of the present application stores the instruction/program data 21, and when the instruction/program data 21 is executed, implements any embodiment of the TCI state configuration method of the present application and the method provided by any non-conflicting combination.
  • the instruction/program data 21 can be stored in the above-mentioned user equipment or the storage medium of the base station 20 in the form of a program file in the form of a software product, so that a computer device (which can be a personal computer, a server, or a network device, etc.) or A processor (processor) executes all or part of the steps of the methods of various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes , or terminal devices such as computers, servers, mobile phones, and tablets.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the device embodiments described above are only illustrative.
  • the division of units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

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Abstract

本申请提供一种多TRP系统中TCI状态的配置方法，该方法包括：根据监测的搜索空间及对应的控制资源集合CORESET获取PDCCH相关信息，CORESET配置1个激活的传输配置指示TCI状态或2个激活的TCI状态，每个激活的TCI状态包括发送波束相关参数，UE使用TCI状态对应的接收波束以进行PDCCH的接收。通过上述方式，使得UE可根据实现情况，灵活使用1个激活的TCI状态对应的接收波束或使用2个激活的TCI状态对应的接收波束来接收PDCCH。

Description

一种多TRP系统中TCI状态的配置方法 【技术领域】
本发明的所公开实施例涉及通信技术领域，且更具体而言，涉及一种多TRP系统中TCI状态的配置方法及用户设备。
【背景技术】
用户设备(User Equipment,UE)需要知道物理下行控制信道(PDCCH:Physical Downlink Control Channel)在频域上的位置和时域上的位置才能成功解码PDCCH。在新空口(NR:New Radio)系统中，将PDCCH的频域资源信息和时域占用的正交频分复用(OFDM:Orthogonal Frequency Division Multiplexing)符号数等信息封装在控制资源集合(CORESET:Control Resource Set)中，将PDCCH起始OFDM符号以及监听周期、关联的CORESET等信息封装在搜索空间(Search Space,SS)中。UE根据搜索空间和CORESET配置确定出PDCCH的候选时频位置后，这些候选的资源称为PDCCH候选。对每个候选PDCCH进行Polar解码和循环冗余校验(CRC:Cyclic Redundancy Check)，当CRC校验通过后，则表示当前候选PDCCH解调成功。
由于从传输接收节点(TRP:Transmission/Reception Point)到UE之间PDCCH信道可能被阻塞，因此，需要增强PDCCH信道的可靠性。如图1所示，从多个TRP传输多个PDCCH(即：PDCCH1和PDCCH2)给一个UE，这些PDCCH使用不同的波束传输，并且指示相同的资源分配信息用于调度一个物理下行共享信道(PDSCH:Physical Downlink Share Channel)/物理上行共享信道(PUSCH:Physical Uplink Share Channel)等，PDCCH通过多TRP系统传输能增强其可靠性。
在SFN(Non-Single Frequency Network)下增强多TRP系统中PDCCH传输，可支持在一个搜索空间集合中一个PDCCH候选与CORESET的两个TCI状态关联，但是现有协议中一个CORESET只配置了一个TCI状态，并且一个PDCCH candidate只与一个TCI状态关联。因此，当一个CORESET配置两个TCI状态时，需要提出一种方法来定义两个TCI状态的配置及使用。
【发明内容】
根据本发明的实施例，本发明提供一种多TRP系统中TCI状态配置方法以解决上述技术问题。
根据本申请的第一方面，提供了一种多TRP系统中TCI状态的配置方法，该方法包括：根据监测的搜索空间及对应的控制资源集合CORESET获取PDCCH，CORESET配置1个激活的TCI状态或2个激活的TCI状态，每个激活的TCI状态包括发送波束相关参数，UE通过TCI状态对应的接收波束以进行PDCCH的接收。
根据本申请另一方面，提供了一种用户设备，该用户设备包括处理器和通信电路，处理器连接通信电路；处理器用于执行如第一方面所述的配置方法。
根据本申请又一方面，提供了一种用户设备，该用户设备存储有指令，该指令被执行时实现第一方面所述的配置方法。
本申请的有益效果是：本申请通过根据监测的搜索空间及对应的控制资源集合CORESET配置信息接收PDCCH，通过每个CORESET可配置1个激活的TCI状态或2个激活的TCI状态，每个激活的TCI状态包括发送波束相关参数，使得UE可根据实现情况，灵活使用1个激活的TCI状态对应的接收波束或使用2个激活的TCI状态对应的接收波束来接收PDCCH。
【附图说明】
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。其中：
图1是多TRP系统中PDCCH信道的传输原理示意图；
图2是本申请TCI状态配置方法实施例的MAC控制单元字段定义示意图；
图3是本申请TCI状态配置方法一实施例的资源单位分组接收的示意图；
图4是本申请TCI状态配置方法另一实施例的资源单位分组接收的示意图；
图5是本申请执行TCI状态配置方法实施例的用户设备的结构示意图；
图6是本申请执行TCI状态配置方法实施例的用户设备的存储示意图。
【具体实施方式】
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性的劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请提供一种多TRP系统中TCI状态的配置方法。该配置方法包括：
根据监测的搜索空间及对应的控制资源集合CORESET获取PDCCH相关信息，所述CORESET配置1个激活的传输配置指示TCI状态或2个激活的TCI状态，每个所述激活的TCI状态包括发送波束相关参数，UE通过所述TCI状态对应的接收波束以进行PDCCH的接收。
CORESET包括PDCCH的频域资源信息和时域占用的OFDM符号数等信息，搜索空间包括PDCCH起始OFDM符号以及监听周期、关联的CORESET等信息，CORESET包括PDCCH的频域资源信息和时域占用的OFDM符号数等信息。UE通过无线资源控制(Radio Resource Control,RRC)获取搜索空间信息和CORESET信息。进而通过搜索空间信息和CORESET的信息配置获取PDCCH相关信息。
其中，CORESET还包括TCI状态的配置，基站通过高层参数ControlResourceSet下的参数tci-States-ToAddModList为一个CORESET配置一系列的TCI状态，并由UE级PDCCH TCI状态指示的MAC层控制单元(MAC CE:MAC Control Element)激活这个CORESET具体使用的一个TCI状态。对于基站配置的不同CORESET，一些CORESET被配置激活一个TCI状态，另一些CORESET被配置激活两个TCI状态。每个激活的TCI状态中包含发送波束相关参数，例如发送波束的具体方向参数，UE可通过使用TCI状态对应的接收波束以进行PDCCH的接收。
在一实施例中，CORESET配置1个激活的TCI状态或2个激活的TCI状态是分别使用不同的MAC控制单元MAC CE进行指示的。
具体地，可使用原有的MAC CE格式用于指示一个CORESET的一个TCI状态，另外定义一个新的MAC CE用于指示一个CORESET激活两个TCI状态。因此，当一个CORESET只需要激活一个TCI状态时，使用原有的MAC CE进行指示，当一个CORESET需要激活两个TCI状态时，使用新定义的MAC CE进行指示。由于不同的MAC CE有不同的信令开销，不同的MAC CE应用不同的场景，这样能节约信令开销。
如图2所示，在这个新的MAC CE中，使用字段Serving Cell ID指示使用这个MAC CE的服务小区，这个字段长度为5比特。字段CORESET ID表示一个控制资源集合标识，由高层参数controlResourceSetId指示，表示使用这个TCI状态的CORESET，这个字段长度为4比特，其中，如果这个字段值为0，这个CORESET由高层参数controlResourceSetZero配置；字段TCI State ID1和TCI State ID2表示为这个CORESET激活的两个TCI状态，由高层参数TCI-StateId指示，这个两个字段长度都为7比特，其中，如果字段CORESET ID值为0，这两个TCI状态是高层参数PDSCH-Config下参数tci-States-ToAddModList和tci-States-ToReleaseList的前64个TCI状态中的两个TCI状态，如果字段CORESET ID值为非0，这两个TCI状态是高层参数controlResourceSet下参数tci-StatesPDCCH-ToAddList和tci-StatesPDCCH-ToReleaseList中的两个TCI状态。
在另一实例中，CORESET配置所述1个激活的TCI状态或所述2个激活的TCI状态是使用同一个MAC CE进行指示的。
具体的，可以新定义一个MAC CE，使用其中的一个比特位用于指示这个MAC CE是用于激活一个CORESET的一个TCI状态或者两个TCI状态，对于调度而言，比较简便，无需区分不同激活TCI状态个数使用不同的MAC CE。
在一实施例中，这个新定义的MAC可以参考如图2所示的字段定义，可以利用保留字段R来指示MAC CE是用于激活一个CORESET的一个TCI状态或者两个TCI状态，而其他字段的使用方法可以与上述一致。保留字段R长度为1比特，用于指示当前的MAC CE用于激活这个CORESET的一个TCI状态或者两个TCI状态，具体地，如果字段R值为0，表示当前MAC CE用于激活这个CORESET的一个TCI状态，如果字段R值为1，表示当前MAC CE用于激活这个CORESET的两个TCI状态，反之亦然。
当该MAC CE是用于激活这个CORESET的一个TCI状态，使用字段TCI State ID1中指示的TCI状态；当该MAC CE是用于激活这个CORESET的两个TCI状态，这个MAC CE使用两个字段用于指示两个TCI状态，即：使用字段TCI State ID1和TCI State ID2指示的TCI状态，这两个TCI状态的索引值由高层参数TCI-StateId指示。其中，如果字段CORESET ID值为0，TCI State ID1和TCI State ID2指示的TCI状态是高层参数PDSCH-Config下参数tci-States-ToAddModList和tci-States-ToReleaseList的前64个TCI状态中的TCI 状态，如果字段CORESET ID值为非0，TCI State ID1和TCI State ID2指示的TCI状态是高层参数controlResourceSet下参数tci-StatesPDCCH-ToAddList和tci-StatesPDCCH-ToReleaseList中的TCI状态。
如上述的，当CORESET配置2个激活的TCI状态时，UE通过TCI状态对应的接收波束以进行PDCCH的接收进一步包括：
S110：把PDCCH候选(Candidate)的频域资源根据资源单位分成两组，分别为第一组PDCCH候选资源和第二组PDCCH候选资源。
UE在频域上对PDCCH候选进行接收，一个PDCCH候选由若干个频域资源单位(即：REG/REG bundle/CCE/RB)构成，频域资源单位可为REG(Resource Element Group)、REG bundle、CCE(Control Channel Element)、RB(Resource Block)。可以把PDCCH候选的频域资源根据资源单位索引值的奇偶数分成两组，资源单位索引值为奇数时为第一组PDCCH候选资源，资源单位索引值为偶数时为第二组PDCCH候选资源，当然也可以是资源单位索引值为偶数时为第一组PDCCH候选资源，资源单位索引值为奇数时为第二组PDCCH候选资源。也可以把PDCCH候选的频域资源根据资源单位索引值的大小顺序分成两组，资源单位索引值的前一半为第一组PDCCH候选资源，资源单位索引值的后一半为第二组PDCCH候选资源。当然也是可以是资源单位索引值的后一半为第一组PDCCH候选资源，资源单位索引值的前一半为第二组PDCCH候选资源。
S120：使用其中一个激活的TCI状态对应的接收波束接收第一组PDCCH候选资源之后，再使用另一个激活的TCI状态对应的接收波束接收第二组PDCCH候选资源。
具体地，先使用其中一个激活的TCI状态对应的第一个接收波束接收第一组PDCCH候选资源，再使用第二个激活的TCI状态对应的第二个接收波束接收第二组PDCCH候选资源。例如，如图3所示，以资源单位索引值的奇偶数分组，UE先使用第一个接收波束在资源单位#0&#2&#4&#6上监测，再使用第二个接收波束在资源单位#1&#3&#5&#7上监测。也可以是，如图4所示，以资源单位索引值的大小顺序分组，UE先使用第一个接收波束在资源单位#0&#1&#2&#3上监测，再使用第二个接收波束在资源单位#4&#5&#6&#7上监测。
在一实施例中，UE通过TCI状态对应的接收波束进行PDCCH的接收之后可能进一步包括：当PDCCH与其调度的物理下行共享信道PDSCH之间的调度 时间小于一个门限值，UE使用默认的TCI状态对应的接收波束进行PDSCH的接收。
具体地，该门限值由高层参数timeDurationForQCL配置得到，当PDCCH与其调度的物理下行共享信道PDSCH之间的调度时间小于这个门限值时，PDSCH不能使用调度该PDSCH的PDCCH配置的TCI状态，只能使用默认的TCI状态对应的参数，当CORESET配置1个激活的TCI状态时，这个默认的TCI状态是前一个时隙所监测的CORESET中，索引值最小的CORESET对应的TCI状态，即：PDCCH和PDSCH信道在这个时间段内使用相同TCI状态对应的接收波束。
而当CORESET配置2个激活的TCI状态时，默认的TCI状态可分为以下几种情况：
在一实施例中，将前一个时隙所监测的CORESET中，索引值最小的CORESET所激活的TCI状态中索引值最小的TCI状态作为默认TCI状态，UE使用该默认的TCI状态对应的接收波束对PDSCH进行接收。
在另一实施例中，CORESET可以在频域上根据资源单位REG/REG bundle/CCE索引值分成两组，每组使用一个TCI状态进行PDCCH候选监测。将前一个时隙所监测的CORESET对应的资源单位中索引值最小的资源单位对应的TCI状态作为默认的TCI状态，UE使用该默认的TCI状态对应的接收波束对PDSCH进行接收。
在又一实施例中，CORESET可以在时域上根据OFDM(Orthogonal Frequency Division Multiplexing)符号索引值分成两组，每组使用一个TCI状态进行PDCCH候选监测。将前一个时隙所监测的CORESET对应的OFDM符号中索引值最小的OFDM符号对应的TCI状态作为默认的TCI状态，UE使用该默认的TCI状态对应的接收波束对PDSCH进行接收。
在其他实施例中，当PDSCH通过2个TRP进行发送时，将前一个时隙所监测的CORESET中索引值最小的CORESET的2个激活的TCI状态作为2个默认的TCI状态，UE使用2个默认的TCI状态对应的2个接收波束分别对2个TRP的2个PDSCH进行接收。
本申请还提供一种用户设备，用于执行上述的TCI状态的配置方法。请参阅图5，用户设备10包括处理器12和通信电路11；处理器12连接通信电路11，处理器12用于执行指令以实现上述TCI状态的配置方法。
处理器12还可以称为CPU(Central Processing Unit，中央处理单元)。处理器12可能是一种集成电路芯片，具有信号的处理能力。处理器12还可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。通用处理器可以是微处理器或者该处理器12也可以是任何常规的处理器等。
请参阅图6，图6为本申请实施方式中用户设备的存储结构示意图。本申请实施例的用户设备20存储有指令/程序数据21，该指令/程序数据21被执行时实现本申请的TCI状态配置方法的任一实施例以及任意不冲突的组合所提供的方法。其中，该指令/程序数据21可以形成程序文件以软件产品的形式存储在上述用户设备或基站20的存储介质中，以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施方式方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质，或者是计算机、服务器、手机、平板等终端设备。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
以上仅为本申请的实施方式，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (12)

  1. 一种多传输接收节点TRP系统中传输配置指示TCI状态的配置方法，所述方法包括：
    根据监测的搜索空间及对应的控制资源集合CORESET获取PDCCH相关信息，所述CORESET配置1个激活的传输配置指示TCI状态或2个激活的TCI状态，每个所述激活的TCI状态包括发送波束相关参数，UE使用TCI状态对应的接收波束以进行PDCCH的接收。
  2. 根据权利要求1所述的方法，其特征在于，所述CORESET配置所述1个激活的TCI状态或所述2个激活的TCI状态是分别使用不同的MAC控制单元MAC CE进行指示的。
  3. 根据权利要求1所述的方法，其特征在于，所述CORESET配置所述1个激活的TCI状态或所述2个激活的TCI状态是使用同一个MAC CE进行指示的。
  4. 根据权利要求1所述的方法，其特征在于，当所述CORESET配置2个所述激活的TCI状态时，所述UE通过所述TCI状态对应的接收波束以进行PDCCH的接收进一步包括：
    把所述PDCCH候选的频域资源根据资源单位分成两组，分别为第一组PDCCH候选资源和第二组PDCCH候选资源；
    使用其中一个所述激活的TCI状态对应的接收波束接收所述第一组PDCCH候选资源之后，再使用另一个所述激活的TCI状态对应的接收波束接收所述第二组PDCCH候选资源。
  5. 根据权利要求4所述的方法，其特征在于，所述把所述PDCCH候选的频域资源根据资源单位分成两组，分别为第一组PDCCH候选资源和第二组PDCCH候选资源进一步包括：
    把所述PDCCH候选的频域资源根据资源单位索引值的奇偶数分成两组，所述资源单位索引值为奇数时为第一组PDCCH候选资源，所述资源单位索引值为偶数时为第二组PDCCH候选资源；或
    把所述PDCCH候选的频域资源根据资源单位索引值的大小顺序分成两组，所述资源单位索引值的前一半为第一组PDCCH候选资源，所述资源单位索引值的后一半为第二组PDCCH候选资源。
  6. 根据权利要求1所述的方法，其特征在于，UE通过所述TCI状态对应的接收波束以进行PDCCH接收之后进一步包括：
    当所述PDCCH与其调度的物理下行共享信道PDSCH之间的调度时间小于一个门限值，UE使用默认的TCI状态对应的所述接收波束以进行所述PDSCH的接收。
  7. 根据权利要求6所述的方法，其特征在于，所述UE使用默认的TCI状态对应的所述接收波束以进行所述PDSCH的接收进一步包括：
    将前一个时隙所监测的CORESET中索引值最小的CORESET的所述2个激活的TCI状态中索引值最小的TCI状态作为所述默认的TCI状态，UE使用所述默认的TCI状态对应的所述接收波束以进行PDSCH的接收。
  8. 根据权利要求6所述的方法，其特征在于，所述UE使用默认的TCI状态对应的所述接收波束以进行所述PDSCH的接收进一步包括：
    将前一个时隙所监测的CORESET在频域上的资源单位索引值最小的资源单位对应的TCI状态作为默认的TCI状态，UE使用所述默认的TCI状态对应的所述接收波束以进行PDSCH的接收。
  9. 根据权利要求6所述的方法，其特征在于，其特征在于，所述UE使用默认的TCI状态对应的所述接收波束以进行所述PDSCH的接收进一步包括：
    将前一个时隙所监测的CORESET在时域上的OFDM符号索引值最小的OFDM符号对应的TCI状态作为默认的TCI状态，UE使用所述默认的TCI状态对应的所述接收波束以进行PDSCH的接收。
  10. 根据权利要求1所述的方法，其特征在于，其特征在于，所述UE使用默认的TCI状态对应的所述接收波束以进行所述PDSCH的接收进一步包括：
    当所述PDSCH通过2个TRP进行发送时，将索引值最小的CORESET的所述2个激活的TCI状态作为2个所述默认的TCI状态，UE使用2个所述默认的TCI状态对应的2个所述接收波束分别对所述2个TRP的2个所述PDSCH进行接收。
  11. 一种用户设备，其特征在于，包括处理器和通信电路，所述处理器连接所述通信电路；
    所述处理器用于执行上述权利要求1-10中任一项所述的TCI状态的配置方法。
  12. 一种用户设备，存储有指令，其特征在于，所述指令被执行时实现如权利要求1-10中任一项所述的TCI状态的配置方法。
PCT/CN2021/072354 2021-01-17 2021-01-17 一种多trp系统中tci状态的配置方法 WO2022151457A1 (zh)

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CN202180091011.3A CN116848793A (zh) 2021-01-17 2021-01-17 一种多trp系统中tci状态的配置方法
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