WO2022082684A1

WO2022082684A1 - Control information transmission method, device, and system

Info

Publication number: WO2022082684A1
Application number: PCT/CN2020/123016
Authority: WO
Inventors: 刘显达; 纪刘榴
Original assignee: 华为技术有限公司
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-04-28

Abstract

Disclosed in embodiments of the present invention are a control information transmission method, device, and system. The method comprises: a user equipment determines an association relationship between multiple resource element group (REG) bundles and transmission configuration indicators (TCIs), wherein the multiple REG bundles are REG bundles corresponding to one control resource set (CORESET), and among the multiple REG bundles, a first REG bundle is associated with a first TCI, and a second REG bundle is associated with a second TCI; and the user equipment detects, according to the determined association relationship, a physical downlink control channel (PDCCH) candidate corresponding to the CORESET.

Description

A method, device and system for transmitting control information

technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and device.

Background technique

In the multi-point transmission technology, multiple transmission reception points (transmission reception points, TRP) can transmit downlink signals for users through cooperation, and/or receive uplink signals of users through cooperation. For example, two TRPs can send their respective downlink control information (DCI) to the same terminal, and the two DCIs schedule the same data. The DCI is carried on a certain physical downlink control channel (physical downlink control channel, PDCCH) candidate (PDCCH candidates) in the control resource set (CORESET). Each of the two TRPs corresponds to a different CORESET. A CORESET includes at least one PDCCH candidate. A PDCCH candidate consists of at least one control channel element (CCE). The identifier (ID) of the CCE included in each PDCCH candidate is related to the DCI detection occasion corresponding to the PDCCH candidate and the ID of the CORESET. Different modulation symbols of one DCI are sent separately by 2TRP. Specifically, the REG bundle is used as the granularity to correspond to different QCL assumptions (different TRPs) according to parity. After the QCL assumption can be mapped with the REG bundle as the granularity in CORESET, the QCL assumption on the resource (configured in the TCI state) can be determined according to the physical resource location occupied by the actual DCI transmission.

The above control information transmitted on the time-frequency resources is generated after the information bits are filled with the CRC check code and the bit sequence formed after scrambled enters the Polar code channel encoder, and is transmitted in the order of the time-frequency resources. It is possible that both the REG bundle in the retransmission position and the REG bundle in the non-retransmission position are associated with a TCI state, which will greatly affect the system transmission reliability.

SUMMARY OF THE INVENTION

In view of this, embodiments of the present invention provide a communication method, device, and system to implement the problem of configuring the correspondence between REG bundles and different TCIs in a time-frequency resource corresponding to a COREST or a subset thereof.

A first aspect provides a communication method, the method comprising: a user equipment determining an association relationship between multiple resource unit bundles REG bundles and a transmission configuration indication TCI, wherein the multiple REG bundles correspond to a control resource set CORESET REG bundle, among the multiple REG bundles, the first REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI; the user equipment detects the CORESET correspondence according to the determined association relationship physical downlink control channel PDCCH candidates. In this way, the user equipment determines the association relationship between different REG bundles and TCIs, so that the corresponding relationship between repeated bits and non-repetitive bits can correspond to different TCI flexible configurations. In addition, in the multi-TRP scenario, the multi-TRP band can also be fully utilized. performance gain. Here, the first REG bundle may be a set, or form a set, the REG bundles in the set are associated with the first TCI, and the second REG bundle may be a set, or form a set, and the REG bundles in the set are associated with the first TCI. The second TCI is associated.

In an implementation manner of the first aspect, the association relationship is a first association relationship, the first relationship is one of at least two association relationships, and the first association relationship satisfies: the first REG bundle It is composed of REG bundles with odd and even numbers, and the second REG bundle is a REG bundle other than the first REG bundle, wherein the multiple REG bundles are from small to large or from large to large according to the frequency domain. Small sequence number, the number of REG bundles included in the first REG bundle and the second REG bundle is the same. As a similar implementation manner, the user equipment may also directly determine one other association relationship from two or more association relationships, but one of the two or two association relationships satisfies the first REG bundle It consists of odd-numbered and even-numbered REG bundles, and the second REG bundle is a REG bundle other than the first REG bundle. Generally speaking, when the above-mentioned REG bundle set is defined according to COREST or according to a PDCCH candidate, the number of REG bundles is usually an even number. Therefore, in terms of orderly numbering in the frequency domain, the first REG bundle contains odd-numbered and even-numbered REGs The bundle can provide a different corresponding manner in which a number corresponding to an odd position is associated with one TCI, and a number corresponding to an even position is associated with another TCI, so as to further make the corresponding relationship between repeated bits and non-repetitive bits correspond to different TCIs. configuration.

With reference to the first embodiment of the first aspect, the first association relationship satisfies: the maximum value of the even number in the first REG bundle is less than the minimum value of the odd number in the first REG bundle; the second The odd-numbered maximum value in a REG bundle is less than the even-numbered minimum value. That is, for the first REG bundle, all even-numbered positions are smaller than odd-numbered positions, and for the second REG bundle, all even-numbered positions are larger than odd-numbered positions, so that a "staggered position" can appear in the relationship between the first half and the second half. Make as many repeated bits as possible and corresponding non-repetitive bits correspond to different TCIs, so as to further improve system performance and reliability.

With reference to the first aspect and the embodiments thereof, in another embodiment, the multiple REG bundles include N REG bundles, and the first association relationship satisfies: the first REG bundle includes the multiple REG bundles The even-numbered REG bundles in the first N/2 REG bundles and the odd-numbered REG bundles in the latter N/2 REG bundles in the plurality of REG bundles; the second REG bundles include the The odd-numbered REG bundles in the first N/2 REG bundles in the multiple REG bundles and the even-numbered REG bundles in the second N/2 REG bundles in the multiple REG bundles. As an alternative solution, the multiple REG bundles include N REG bundles, and the first association relationship satisfies: the first REG bundle includes the first N/3 and the last N/ The even-numbered REG bundles in the REG bundles of 3 and the odd-numbered REG bundles in the REG bundles numbered in the middle N/3 in the plurality of REG bundles; the second REG bundles include the plurality of REG bundles. The odd-numbered REG bundles in the REG bundles numbered in the first N/3 and the latter N/3, and the even-numbered REG bundles in the REG bundles numbered in the middle N/3 of the plurality of REG bundles. In one embodiment, the position of the first N/3 or the last N/3 may be flexibly adjusted, for example, the corresponding position after rounding up/down the calculation result of the first N/3 or the last N/3.

In conjunction with the first aspect and its implementation, the first association relationship satisfies: the REG bundle number k in the first REG bundle satisfies: (k mod 4)<3, the REG bundle number in the second REG bundle is numbered k satisfies: (k mod 4)≥3.

In conjunction with the first aspect and its implementation, the multiple REG bundles include N REG bundles, and the first association relationship satisfies: the first REG bundle is the numbered top N/2 of the multiple REG bundles REG bundle, the second REG bundle is the REG bundle of N/2 after the numbering in the multiple REG bundles.

In combination with the first aspect and the implementation thereof, the at least two association relationships further include a second association relationship, and the second association relationship satisfies: the first REG bundle is composed of odd-numbered REG bundles, and the second association relationship satisfies: Two REG bundles consist of even-numbered REG bundles.

With reference to the first aspect and its implementation manner, the user equipment receives configuration information, and the configuration information indicates the association relationship. Optionally, this indication information may be an explicit indication or an implicit indication. The user equipment and/or the network equipment may store different association relationships in advance, and then notify or negotiate the adopted association relationship through indication information or other signaling. In this way, the notification efficiency of the association relationship between the base station and the user equipment can be saved, and air interface resources can be saved.

In conjunction with the first aspect and the implementation thereof, the CORESET is composed of multiple REG bundles, and the numbers of the multiple REG bundles are consecutive; or, the multiple REG bundles correspond to one or more PDCCHs associated with the CORESET Candidate, when the mapping mode of the CCE to REG corresponding to the CORESET is non-interleaving, the numbers of the multiple REG bundles are consecutive; when the mapping mode of the CCE to REG corresponding to the CORESET is interleaved, the multiple The numbering of REG bundles is segment-contiguous, and the number of segments is associated with the number of interleaving matrix rows.

In combination with the first aspect and its implementation, the CORESET occupies 2 OFDM symbols and the corresponding mapping method from CCE to REG is interleaving, the number of REGs corresponding to each matrix element of the interleaving matrix is 2ⅹM, and M is the size of the REG bundle .

It should be understood that various implementation manners of the above-mentioned first aspect may be reasonably combined and replaced.

In a second aspect, a communication method is provided, the method comprising: a base station determining an association relationship between a plurality of resource unit bundles REG bundles and a transmission configuration indication TCI, wherein the plurality of REG bundles are corresponding to a control resource set CORESET REG bundle, among the multiple REG bundles, the first REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI; the base station sends the physical downlink control channel PDCCH according to the first association relationship . Similar to the first aspect above, the base station determines the association relationship between multiple resource element bundles REG bundles and the transmission configuration indication TCI. This determination process may be determined by the base station according to resource planning, such as one or more determinations of parameters associated with the interleaving matrix, the payload size of the control channel or encoding parameters, the encoded length and so on. In one embodiment, it may also be associated with the channel quality: for example, the adjustment of the aggregation level parameter according to the channel condition further affects the adopted association relationship. In addition, several implementations combined with the second aspect are also provided, which are the same as or similar to the implementations of the above-mentioned first aspect, and will not be repeated here.

In a third aspect, a communication apparatus is provided, the apparatus includes a determining unit configured to determine the association relationship between multiple resource unit bundles REG bundles and a transmission configuration indication TCI, wherein the multiple REG bundles are one control resource Set the REG bundles corresponding to CORESET, among the multiple REG bundles, the first REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI; the detection unit is used for detecting according to the determined association relationship The physical downlink control channel PDCCH candidate corresponding to the CORESET. The apparatus may be a user equipment, such as a mobile phone, a terminal, etc., or a chip or a processor, or other products capable of implementing the apparatus. In addition, several implementations combined with the third aspect are also provided, which are the same as or similar to the implementations of the first aspect, and will not be repeated here.

In a fourth aspect, a communication device is provided, the device includes a determining unit configured to determine an association relationship between multiple resource unit bundles REG bundles and a transmission configuration indication TCI, wherein the multiple REG bundles are a control resource Set the REG bundles corresponding to CORESET, among the multiple REG bundles, the first REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI; the sending unit is used for, according to the first association relationship, Send the physical downlink control channel PDCCH. The apparatus may be a base station equipment or other network equipment, etc., or may be a chip or a processor, or other products capable of implementing the apparatus. In addition, several implementations combined with the third aspect are also provided, which are the same as or similar to the implementations of the first aspect, and will not be repeated here. The present invention also provides various corresponding systems, readable storage media and chips.

The method, device and system designed according to the above aspects can flexibly configure the corresponding relationship between the REG bundle and different TCIs, and improve the reliability of transmission. In a multi-TRP scenario, the transmission gain can be further improved.

Description of drawings

FIG. 1 shows a schematic diagram of a communication system applicable to the embodiment of the present application.

FIG. 2 is a schematic diagram of a partial bandwidth BWP.

FIG. 3 is a schematic diagram of different aggregation levels corresponding to physical downlink control channels.

FIG. 4 is a schematic diagram of numbering of REGs.

Figure 5 is a schematic diagram of the corresponding relationship of the REG bundle.

Figure 6 is a schematic diagram of the corresponding relationship of the REG bundle.

Figure 7 is a schematic diagram of the corresponding relationship of the REG bundle.

Figure 8 is a schematic diagram of the corresponding relationship of the REG bundle.

FIG. 9 is a schematic diagram of the corresponding relationship of the REG bundle.

Figure 10 is a schematic diagram of the corresponding relationship of the REG bundle.

Figure 11 is a schematic diagram of the corresponding relationship of the REG bundle.

FIG. 12 is a schematic flowchart of a communication method of the present application.

FIG. 13 is a schematic flowchart of a communication method of the present application.

FIG. 14 is a schematic structural diagram of a communication device of the present application.

FIG. 15 is a schematic structural diagram of a communication device of the present application.

FIG. 16 is a schematic structural diagram of a communication device of the present application.

FIG. 17 is a schematic structural diagram of a communication device of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solutions in the embodiments of the present application can be applied to 4th generation (4th Generation, 4G) systems, various systems based on 4G system evolution, 5th generation (5th Generation, 5G) systems, and various systems based on 5G system evolution . The 4G system may also be called an evolved packet system (EPS). The core network of the 4G system may be called an evolved packet core (EPC), and the access network may be called long term evolution (LTE). The core network of the 5G system can be called 5GC (5G core), and the access network can be called new radio (NR). The technical solutions of the embodiments of the present application are applicable to homogeneous networks as well as heterogeneous networks, and are applicable to frequency division duplex (frequency-division duplex, FDD) systems and time-division duplex (time-division duplex, TDD) systems, It is suitable for low-frequency communication scenarios as well as high-frequency communication scenarios.

A communication system to which the technical solutions provided in this application are applicable may include at least one network device and at least one terminal. One or more of the at least one terminal may communicate with one or more of the at least one network device. In the first case, referring to FIG. 1 , a terminal can communicate with multiple network devices (eg, network device 1 and network device 2 ), and the multiple network devices perform data and/or signaling transmission through coordinated multipoint. In the second case, a network device may use different beams or different communication modules (eg, different antenna panels) to communicate with a terminal. For example, a network device uses different beams to send downlink data to the terminal in different time domain resources. In both cases, the network device can configure uplink and downlink resources, transmit and receive uplink and downlink signals, and can also send DCI when the network device is in the scheduling mode. The terminal can send and receive uplink and downlink signals and side signals. In addition to these two situations, the present application is also applicable to communication scenarios derived based on these two situations.

A network device is an entity on the network side that is used for sending a signal, or receiving a signal, or sending a signal and receiving a signal. A network device may be a device deployed in a radio access network (RAN) to provide a wireless communication function for a terminal, for example, a TRP, a base station, various forms of control nodes (for example, a network controller, a radio control (for example, a wireless controller in a cloud radio access network (CRAN) scenario), etc. Specifically, the network equipment can be various forms of macro base stations, micro base stations (also called small cells), relay stations, access points (access points, APs), etc., and can also be antenna panels of base stations, remote radio heads (remote radio heads), etc. radio head, RRH), etc. The control node can be connected to multiple base stations, and configure resources for multiple terminals covered by the multiple base stations. In systems using different radio access technologies, the names of devices with base station functions may vary. For example, an LTE system may be called an evolved NodeB (eNB or eNodeB), and a 5G system or an NR system may be called a next generation node base station (gNB), the specific name of the base station in this application Not limited. The network device may also be a network device in a future evolved public land mobile network (public land mobile network, PLMN). The multiple network devices in the above first case may be the same type of network devices, or may be different types of network devices. For example, all of them may be macro base stations, or all may be micro base stations, and some may be macro base stations and some may be micro base stations.

A terminal is an entity on the user side that is used to receive signals, or send signals, or receive and send signals. The terminal is used to provide one or more of voice service and data connectivity service to the user. A terminal may also be referred to as user equipment (UE), terminal equipment, access terminal, subscriber unit, subscriber station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user device. The terminal may be a mobile station (mobile station, MS), a subscriber unit (subscriber unit), an unmanned aerial vehicle, an internet of things (Internet of things, IoT) device, a station (station, ST), cellular phone, smart phone, cordless phone, wireless data card, tablet computer, session initiation protocol (SIP) phone, wireless local loop (WLL) ) station, personal digital assistant (PDA) device, laptop computer, machine type communication (MTC) terminal, handheld device with wireless communication capabilities, computing device or connected to a wireless Other processing devices for modems, in-vehicle devices, wearable devices (also known as wearable smart devices). The terminal may also be a terminal in a next-generation communication system, for example, a terminal in a 5G system or a terminal in a future evolved PLMN, a terminal in an NR system, and the like.

The network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those of ordinary skill in the art know that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

In order to make the embodiments of the present application clearer, some concepts involved in the present application are briefly introduced first.

1. CORESET

CORESET is used to indicate the frequency domain resource position occupied by the PDCCH and the time domain OFDM symbol length. The PDCCH is a channel used to carry the DCI delivered by the network device. CORESET should be understood as a candidate resource position delivered by the PDCCH, and the actual resource position delivered by the PDCCH is determined by the network device from the candidate resource positions according to the current scheduling.

Compared with sending the PDCCH at a fixed resource location, the advantage of the network device selecting the actual resource location for the PDCCH delivery in the CORESET is to increase the flexibility of the network device delivering the PDCCH. For example, multiple terminals served by a network device can share a CORESET (that is, the time-frequency resources occupied by the CORESET configured for multiple terminals are the same), and then select appropriate resources for each terminal in CORESET according to the actual scheduling situation. Send PDCCH. For another example, the network device may determine appropriate resources to issue the PDCCH according to service requirements, for example, a service requiring high reliability requires more resources to transmit the PDCCH.

Exemplarily, a resource indication manner occupied by the PDCCH is: in the frequency domain, the number of resource blocks (resource blocks, RBs) occupied by the CORESET is an integer multiple of 6, which is indicated by a bitmap (bitmap). For example, referring to Figure 2, a bandwidth part (BWP) occupies a total of 18 RBs. When the value of one bit in the bitmap is 1, it means that 6 consecutive RBs are allocated to CORESET, then 3 bits "110" can be used. Indicates that the current CORESET occupies the first 12 RBs. In the time domain, one CORESET can be configured to occupy consecutive 1-3 orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols.

In CORESET, the quasi co-location (QCL) assumption information of DCI, the scrambling sequence of demodulation reference signal (DMRS), the precoding granularity, and the CCE to Information such as resource element group (REG) mapping method. Exemplarily, the network device may configure multiple CORESETs for the terminal, and each CORESET may use radio resource control (radio resource control, RRC) signaling/media access control control element (media access control control element, MAC CE) signaling. Configure some or all of the following parameters independently:

(1) CORESET ID: used to identify a CORESET.

(2) QCL assumption parameters (see below for meaning).

The QCL assumption parameter can choose one or more of the following QCL types: QCL Type A, QCL Type B, QCL Type C, QCL Type D. Wherein, each parameter can be indirectly indicated by the reference signal index value.

(3) Time-frequency resource configuration parameter occupied by the PDCCH: used to indicate the frequency-domain resource location and the number of time-domain OFDM symbols corresponding to the CORESET.

(4) DMRS scrambling sequence initialization value (scrambling sequence initialization), an integer ranging from 0 to 65535, used to indicate the DMRS scrambling sequence used for PDCCH demodulation.

(5) Precoding granularity: including wideband precoding and subband precoding types. Under wideband precoding, the terminal can perform joint channel estimation according to the DMRS on the RB occupied by CORESET. Under subband precoding, the terminal can perform joint channel estimation according to each subband The DMRS in the channel are estimated respectively.

(6) CCE to REG mapping parameter (see below for the meaning), the CCE to REG mapping parameter can be one of the following:

a. Interleaving mapping: The REG clusters included in each CCE in CORESET are non-consecutive in the frequency domain, and the specific REG clusters included are based on the number of rows of the interleaving matrix R, R∈{2,3,6}; REG clusters (REG bundles) ) size L (that is, the number of REGs contained in the REG bundle) is determined.

b. Non-interleaving mapping: The REG clusters included in each CCE in CORESET are continuous in the frequency domain.

Specifically, REG bundle i includes REGs{iL,iL+1,...,iL+L-1},

in,

is the number of REGs included in CORESET; CCE j consists of REG bundles{f(6j/L),f(6j/L+1),...,f(6j/L+6/L-1)}, where f(·) characterizes the interleaver.

For non-interleaved CCE to REG mapping, L=6 and f(x)=x;

For interleaved CCE to REG mapping, when

when L∈{2,6}; when

hour,

The interleaver is defined as:

x=cR+r

r=0,1,…,R-1

c=0,1,...,C-1

R∈{2,3,6}

The number of rows R of the interleaving matrix is configured in CORESET. The number of rows R of the interleaving matrix, the size L of the REG bundle, and the number of REGs included in the CORESET

C needs to be guaranteed to be an integer. 2. DCI detection

The actual resource location delivered by the DCI requires the terminal to perform multiple blind detection and determination on the time-frequency resources indicated by CORESET according to preset rules. Specifically, in the time-frequency resource indicated by CORESET, according to preset rules, on a specific resource in the time-frequency resource (for example, the time-frequency resource corresponding to each PDCCH candidate), according to the corresponding DCI format and scrambling method. DCI reception, channel estimation, demodulation, soft information combining, decoding and other operations. Among them, operations such as DCI reception, channel estimation, demodulation, soft information merging, and decoding may be regarded as a process of detecting DCI as a whole, or only DCI reception may be regarded as a process of detecting DCI, which is not limited in this application. The following description in the present application takes DCI detection including DCI reception, channel estimation, demodulation, soft information combining, decoding and other operations as an example for description.

3. PDCCH candidates

The terminal needs to specify how to perform DCI detection under a certain CORESET configuration. The PDCCH candidate can be understood as the basic granularity for the terminal to perform DCI detection. A PDCCH candidate corresponds to a DCI detection, or corresponds to a DCI detection process (performing operations such as parsing, decoding, and decision of information bits), and corresponds to a specific time-frequency resource on the CORESET.

Each PDCCH candidate includes at least one CCE. Among them, the number of CCEs in the PDCCH candidates is called AL. The candidate values of AL in NR are: {1, 2, 4, 8, 16}. Different PDCCH candidates may correspond to different ALs. For example, referring to Figure 3, a CORESET includes a total of 8 CCEs, numbered 0-7, AL=2 corresponds to 4 PDCCH candidates, numbered 0-3; AL=4 corresponds to 2 PDCCH candidates, numbered 0-1 ; AL=8 corresponds to one PDCCH candidate, numbered 0.

One CCE corresponds to 6 REGs. Each REG includes 1 RB in the frequency domain, that is, 12 subcarriers, and includes 1 OFDM symbol in the time domain, and the REGs are numbered in sequence according to time first and then frequency (see FIG. 4 ). Multiple REGs with consecutive numbers can form a REG bundle, and multiple REG bundles are numbered sequentially on CORESET (REG numbers are for actual time-frequency resources, that is, REGs with consecutive numbers must be adjacent in time domain or frequency domain). Each REG bundle can include 2, 3, or 6 REGs, and this information can be configured by higher layer signaling. Determining the REG bundle number actually corresponding to each CCE may be referred to as CCE-to-REG mapping, and CCE-to-REG may be mapped in a non-interleaved manner or an interleaved manner. The actual time-frequency resources corresponding to one PDCCH candidate may be continuous (interleaving) or discontinuous (non-interleaving) according to the different mapping methods from CCEs to REGs. The mapping process of CCEs to REGs is well known to those skilled in the art, and details are not repeated here.

4. Search space set (SSS)

The SSS can be understood as a set loaded with configuration information related to multiple PDCCH candidates. An SSS may be associated with at least one CORESET, and the association relationship indicates that the time-frequency resources occupied by each PDCCH candidate in the SSS are determined according to the associated CORESET. The SSS can configure parameters such as the number of PDCCH candidates corresponding to each AL, and the DCI detection timing of the PDCCH candidates under each AL.

Exemplarily, the network device may configure multiple SSSs for the terminal, and each SSS may independently configure the following parameters through RRC signaling:

(1) SSS ID, used to identify the SSS.

(2) The ID of the associated CORESET, which is used to indicate the CORESET associated with the SSS.

(3) The included AL values and the number of PDCCH candidates under each AL value.

(4) PDCCH detection timing, the configuration information is used to indicate the time domain position for detecting each PDCCH candidate in the SSS. The PDCCH detection timing can be configured by a slot or sub-slot or an OFDM symbol group as a unit. The period and offset can also be configured in the specific OFDM symbol position in the above-mentioned time unit. The terminal may perform one DCI detection per time slot, or perform multiple DCI detections per time slot.

(5) Search space types, including common search space (CSS) and cell-specific search space (UE specific search space, USS).

5. Determination of DCI detection resources

Before the DCI detection, that is, before the DCI detection opportunity, the terminal needs to determine the CCE ID included in the PDCCH candidate to be detected, so as to determine which frequency domain resources to perform the DCI detection on. The CCE ID included in the PDCCH candidate is related to the AL of the PDCCH candidate, the ID of the CORESET corresponding to the PDCCH candidate, and the current DCI detection timing corresponding to the AL of the PDCCH candidate, which can be determined according to the method described in TS 38.213.

6. QCL assumption of the signal

The QCL assumption of the signal characterizes the large-scale characteristics of the channel experienced by the transmitted signal in the wireless propagation space, including: Doppler shift, Doppler spread, Delay spread, average Time delay (average delay), spatial reception parameters (Spatial Rx parameter), etc. The QCL assumption of a signal can be indicated by a transmission configuration index (TCI).

In the NR protocol, QCL types can be divided into the following four types based on different parameters:

QCL type A (type A): Doppler shift, Doppler spread, average delay, delay spread;

QCL type B (type B): Doppler shift, Doppler spread;

QCL type C (type C): Doppler frequency shift, average delay;

QCL type D (type D): spatial filtering parameters/spatial receiving parameters/receiving beams.

The present invention does not exclude other QCL types, for example, a QCL type that only includes delay spread, or a type that includes only Doppler frequency shift, or a type that includes Doppler spread and delay spread, and the like.

7. A brief introduction to the encoding method of POLAR code

The information bits are filled with the CRC check code and the bit sequence formed after scrambling enters the Polar code channel encoder. Define the length of the bit sequence output by rate matching, perform channel coding according to the length of the mother code, and input the encoded bits to the rate matching module. When the number of REs occupied by the DCI (PDCCH candidate) E is greater than or equal to the length of the mother code N, the operation will be repeated. : The first EN bits of the encoded bits are called repeated bits, which are concatenated after the N encoded bits. N=2 ⁿ , n is related to E and information bit length K):

when

and K/E<9/16,

otherwise,

R _min = 1/8;

n _min =5; n=max{min{n ₁ ,n ₂ ,n _max },n _min }

The maximum value of n is usually 9.

The above is a brief introduction to some concepts involved in this application.

Different modulation symbols of one DCI are sent by two TRPs respectively. See Figures 5 and 6. Specifically, the REG bundle is used as the granularity to correspond to different QCL assumptions (different TRPs) according to parity. After the QCL assumption can be mapped with the REG bundle as the granularity in CORESET, the QCL assumption on the resource (configured in the TCI state) can be determined according to the physical resource location occupied by the actual DCI transmission. As shown in Figure 5 and Figure 6, a CORESET includes 96 REG bundles, and the size of the REG bundle is 2, so one CCE includes 3 REG bundles. The mapping from CCEs to REG bundles in the CORESET is configured as interleaving. The figure illustrates a matrix interleaving method, that is, assuming that the number of rows of the interleaving matrix is configured to be 6, the REG bundles in the CORESET are arranged in the order of rows first and then columns. 6x16 in the matrix. When determining each PDCCH candidate, determine the corresponding number of REG bundles in the order of column first and then row. If the TCI state is defined according to only one PDCCH candidate (Figure 5), then an AL8 PDCCH candidate in the figure can be composed of the following REG bundles:

{1,2,3,4,17,18,19,20,33,34,35,36,49,50,51,52,65,66,67,68,81,82,83,84}.

The schematic diagram corresponding to the time-frequency position is the first 4 columns in FIG. 5 .

According to the prior art, the odd-numbered REG bundle corresponds to the first TCI state, and the even-numbered REG bundle corresponds to the second TCI state. For the PDCCH candidates of the AL8, among the REG bundles included, the odd-numbered REG bundle corresponds to the first TCI state. TCI state, the even-numbered REG bundle corresponds to the second TCI state.

Specifically, according to the parity mapping QCL assumption of the REG bundle number (configured in the TCI state), for example, the REG bundle in the gray part of the figure corresponds to the first QCL (

REG bundle

1, 3, 17, 19, 33, 35, 49, 51 ,65,67,81,83), the white REG bundle corresponds to the second QCL (

REG bundle

2,4,18,20,34,36,50,52,66,68,82,84). In another embodiment, or in other words, the REG bundle in the gray part is associated with the first TCI, and the REG bundle in the white part is associated with the second TCI.

If the TCI state is defined according to a CORESET (Figure 6), the REG bundle in the gray part of the figure corresponds to the first QCL, and the white REG bundle corresponds to the second QCL. It should be understood that FIG. 5 and FIG. 6 are only examples described by using the interleaving matrix. In this application, the above sequence numbers may be used in the interaction process between the base station and the user equipment to facilitate notification and calculation, but these sequence numbers may be flexible according to the system. By design, it is also possible to start numbering from 0, for example. There are many resource locations defined by numbers. It should be understood that these numbering information does not limit the technical solution of the invention, and most of them are for the convenience of description and understanding, especially to indicate the location of the REG bundle. Taking CORESET as an example in the figure, it can also be numbered as A, B, C, D...Z, AA, AB..., where REG bundle A, REG bundle C correspond to the first QCL; REG bundle B, REG bundle D correspond to the second QCL. For example, the present invention will point out that some odd-numbered REG bundles correspond to the first TCI, and even-numbered REG bundles correspond to the second TCI, which means that in the numbering method of the present invention, those REG bundles with odd numbers correspond to the first TCI, In numbering according to the numbering method of the present invention, those REG bundles with even numbers correspond to the second TCI. Generally speaking, according to the numbering method of the present invention, any REG bundle in the first REG bundle and any REG bundle in the second REG bundle are numbered differently.

The following will introduce the coding method based on the POLAR code, the distribution of the non-repetitively transmitted bits and the repetitively transmitted bits in FIG. 5 (refer to FIG. 6 as well). That is, for a PDCCH candidate whose aggregation level is greater than or equal to 8, the corresponding REG bundle carries both the mother code and the repetition of the mother code. For example, after generating a 512-long mother code sequence, add the repetition of 352-long mother code at the end of the sequence, take the first 352 bits of the mother code, and then directly map the sequence in the order of frequency first and then time without channel interleaving. On the REG bundle corresponding to the PDCCH candidate. Then, it can be understood that the REG bundle corresponding to the PDCCH candidate can be divided into two parts according to the carrying mother code and the repetition of the mother code. For example, in the REG bundle occupied by the PDCCH candidate, the part used to carry the mother code is:

{1,2,3,4,17,18,19,20,33,34,35,36,49,50,51},

The part used to carry the repetition of the mother code is:

{51,52,65,66,67,68,81,82,83,84},

Among them, the REG bundle 51 includes a small number of mother codes and a large number of repeated bits of the mother codes.

As mentioned earlier, different REG bundles may be associated with one of the two TCIs in the process of sending with this rule. It can be seen that the mother code corresponding to REG bundle 1 and the REG bundle 51 corresponding to the repeated bits of the mother code 4/5 are all gray, that is, they are all associated with the first TCI, and similarly, the mother code corresponding to REG bundle 2 The REG bundles 52 corresponding to the repeated bits of the mother code 4/5 are all white, and they are all associated with the second TCI, and so on. Therefore, in most cases, the same mother code bit is sent by only one TRP, and when the transmission link of one TRP in the cooperative set is blocked, the mother code bit sent by the TRP cannot be received.

Hereinafter, an embodiment of the present invention will be introduced with reference to FIG. 12 , and the gain that can be achieved by multi-TRP transmission will be fully utilized in combination with the above-mentioned mapping relationship. This embodiment may be a user equipment, and may also be replaced by a chip, a processor, other terminal equipment, or a communication device.

Step 1001: the user equipment determines the first association relationship between multiple REG bundles and the transmission configuration indication TCI, wherein the multiple REG bundles are REG bundles corresponding to a control resource set CORESET, and among the multiple REG bundles, the first The REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI;

Step 1002: The user equipment detects the physical downlink control channel PDCCH candidate corresponding to the CORESET according to the first association relationship.

In step 1001, the user equipment may receive a piece of indication information in advance, and the above indication information indicates the association relationship between multiple REG bundles and the transmission configuration indication TCI. The indication information may indicate one of a plurality of association relationship mappings (eg, indicating a first association relationship). It should be understood that other association relationships may be determined in step 1001, for example, a second association relationship is determined; correspondingly, the indication information also indicates the second association relationship. The association relationship here may refer to a pattern, that is, an overall association relationship, or a mapping rule, so that the user equipment can determine the TCI corresponding to each REG bundle according to the pattern, the mapping rule, or the association relationship.

As described above, the user may determine an association relationship from at least two association relationships. In one embodiment, the user equipment may pre-store two or more of the association relationships, and determine to select a corresponding association relationship by receiving indication information. In order to achieve the purpose of saving air interface resources.

Optionally, for the device to determine one of multiple association relationships according to the configuration information of CORESET. Specifically, the configuration information of CORESET includes at least: the number of REGs, the size of the REG bundle, and the mapping method from CCEs to REGs.

Optionally, for a PDCCH candidate of AL8, when the size of the REG bundle is 2, the interleaving method is used to map the CCE to the REG and the number of columns of the interleaving matrix determined according to the number of rows of the interleaving matrix, the number of REGs, and the size of the REG bundle is an odd number, determine Use relationship 0.

Optionally, for the PDCCH candidate of AL8, when the size of the REG bundle is 6, and the CCE is mapped to the REG in a non-interleaving manner, it is determined that the association relationship 0 is used.

Optionally, for the PDCCH candidate of AL8, when the REG bundle size is 2, and the CCE is mapped to the REG in a non-interleaving manner, it is determined to use the association relationship 1.

Optionally, for a PDCCH candidate of AL8, when the size of the REG bundle is 2, the interleaving method is used to map the CCE to the REG, and the number of columns of the interleaving matrix determined according to the number of rows of the interleaving matrix, the number of REGs, and the size of the REG bundle is an even number, determine Use relationship 1.

Optionally, for the PDCCH candidate of AL8, when the REG bundle size is 6, the interleaving method is used to map the CCE to the REG and the number of columns of the interleaving matrix determined according to the number of rows of the interleaving matrix, the number of REGs, and the size of the REG bundle is an odd number, determine Use relationship 1.

According to the configuration information such as the size of the REG bundle, the interleaving method, and the number of REGs included in the CORESET, an association relationship is determined from the association relationship 0 and the association relationship 1, which can ensure that the repetition of the mother code and the corresponding mother code are sent by different TRPs, improving DCI transmission. reliability.

The multiple REG bundles are REG bundles corresponding to a control resource set CORESET, where the multiple REG bundles may be all REG bundles in CORESET, that is, the association relationship is defined according to CORESET, or may be part of REG bundles , that is, the association is defined according to the part of the REG bundle in CORESET. In one embodiment, the CORESET is composed of multiple REG bundles, and the numbers of the multiple REG bundles are consecutive, or, the multiple REG bundles correspond to one or more PDCCH candidates associated with the CORESET, when all The mapping mode of the CCE corresponding to the CORESET to the REG is non-interleaving, and the numbering of the multiple REG bundles is continuous; when the mapping mode of the CCE corresponding to the CORESET to the REG is interleaving, the multiple REG bundles are The numbering is segment-sequential, and the number of segments is associated with the number of interleaving matrix rows.

The terminal device can first determine the TCI state corresponding to each REG bundle in the CORESET according to the association relationship, and then determine the TCI state corresponding to the resource occupied by each PDCCH candidate according to the REG bundle occupied by the PDCCH candidate to be detected, or directly according to the association relationship. The TCI state corresponding to the REG bundle occupied by each PDCCH candidate to be detected. In one embodiment, the association relationship involved in the present invention may refer to different association relationships corresponding to a determined CORESET, or an association relationship corresponding to a determined PDCCH candidate, or determine the number of REG bundles. corresponding relationship.

In one embodiment, the multiple REG bundles may be REG bundles corresponding to one PDCCH candidate. In yet another embodiment, by notifying the mapping relationship between several specific REG bundles and TCI, after the user equipment obtains the mapping relationship between the several specific REG bundles and TCI, according to predetermined rules, determine a PDCCH candidate corresponding to The mapping relationship between the REG bundle and the TCI. For example, if there are two TCIs associated with different REG bundle 1, then the base station notifies the associated TCI1 in REG bundle 1, then the user equipment associates different TCIs in turn according to the principle of alternation and frequency domain order, that is, REG bundle 2 Associate TCI2, REG bundle 3 associate TCI1….

In yet another embodiment, as an alternative solution, among the multiple REG bundles, the first REG bundle is associated with the first QCL hypothesis, and the second REG bundle is associated with the second QCL hypothesis. As another alternative solution, among the multiple REG bundles, the first REG bundle is directly associated with the first TRP, and the second REG bundle is associated with the second TRP. Of course, in some cases, the above three may be unified, or both of them may be unified. As the first QCL hypothesis is indicated in the first TCI, the second QCL hypothesis is indicated in the second TCI.

In the above introduction, a part of the REG bundle is associated with the first TCI, and the other part is associated with the second TCI. For the purpose of the later description of the aspect, the REG bundle associated with the first TCI is called the first REG bundle, and the second The REG bundle associated with the TCI is called the second REG bundle.

In one embodiment, the user equipment determines that the association relationship is the first association relationship. The different associations will be described in detail below. It should be understood that the association relationship in step 1001 may be part or all of the following association relationship, and may also include other association relationships, which are not limited herein.

Association relationship 0: Association relationship 0 satisfies that the first REG bundle is composed of odd-numbered REG bundles, and the second REG bundle is composed of even-numbered REG bundles. Illustratively, you can refer to the example in FIG. 6 , in which the gray parts are all odd numbers, and the white parts are all even numbers (you can also refer to FIG. 5 , only the first 4 examples are listed).

It should be understood that in a CORESET, each REG bundle in the CORESET is sequentially numbered according to frequency from high to low or from low to high.

For the PDCCH candidates of AL8, when the REG bundle size is 2, the interleaving method is used to map CCEs to REGs and the number of columns of the interleaving matrix is odd, and when the REG bundle size is 6, the non-interleaving method is used to map CCEs to REGs, the association relationship 0 can ensure that most of the mother code and corresponding repeated bits are sent by two TRPs respectively, thereby improving transmission reliability. It should be understood that the present invention does not limit the REG bundle size to only 2 or only 6.

Association 1: Association 1 satisfies that the first REG bundle is composed of odd-numbered and even-numbered REG bundles, and the second REG bundle is a REG bundle other than the first REG bundle. Optionally, if the multiple REG bundles are numbered according to the frequency domain from small to large or from large to small, the number of REG bundles included in the first REG bundle and the second REG bundle is the same. As an optional embodiment, the second REG bundle also consists of odd-numbered and even-numbered REG bundles. As an optional embodiment, if the set of the first REG bundle and the second REG bundle is a PDCCH candidate or a CORESET, the number of REG bundles included in the first REG bundle and the second REG bundle is the same. If the REG bundles are numbered in the frequency domain sequence shown in the figure (Figure 6, Figure 7), the first REG bundle is composed of odd-numbered and even-numbered REG bundles, so that at least a part of the mother code and the corresponding repeated bits are composed of two TRP is sent, which improves the reliability of transmission.

In another embodiment, if still according to the above-mentioned numbering example, in the first association relationship, it is satisfied that the maximum value of the even number in the first REG bundle is less than the minimum value of the odd number in the first REG bundle; The maximum value of the odd number in the second REG bundle is smaller than the minimum value of the first even number of the first REG bundle.

In another embodiment, the multiple REG bundles are all REG bundles in a CORESET, that is, the association relationship is determined according to the REG bundles in the CORESET, and the number of the REG bundles included in the first REG bundle is:

N is the number of REG bundles included in CORESET,

The numbers of the REG bundles included in the second REG bundle are:

N is the number of REG bundles included in CORESET.

In this embodiment, it can be ensured that the mother code and the repetition of the mother code are sent by different TRPs, and at the same time, the frequency domain diversity gain can be obtained.

For example, according to the parity mapping QCL assumption of the REG bundle number (configured in the TCI state), for example, in Figure 7 (taking a PDCCH candidate as an example, see the first four columns) the REG bundle in the gray part is associated with the first TCI (

REG bundle

1,3,17,19,33,35,50,52,66,68,82,84), the white REG bundle is associated with the second TCI (

REG bundle

2,4,18,20,34,36, 49, 51, 65, 67, 81, 83). The first REG bundle is the REG bundle in the white part, and the second REG bundle is the REG bundle in the gray part, then the maximum value of the even number in the first REG bundle is 36, which is smaller than the minimum value of the odd number in the first REG bundle 49; The odd-numbered maximum value of 35 in the second REG bundle is smaller than the even-numbered minimum value of 50 in the second REG bundle. Also refer to FIG. 8, which takes a CORESET as an example.

In this embodiment, in the PDCCH candidates of AL8, the repetition of the mother code and the mother code can be sent by different TRPs, thereby improving the transmission performance. For the PDCCH candidates of AL16, the mother code will undergo two complete repetitions and one partial repetition. Using the above association relationship can ensure that the repetition of the mother code and the mother code are sent by different TRPs, which can also improve transmission performance.

In yet another embodiment, a plurality of REG bundles can be divided into the first half and the second half, wherein, in the association relationship 0, the first half and the second half of the REG bundle corresponding to the first TCI occupy the same column of the interleaving matrix, corresponding to the first half of the REG bundle. The first half and the second half of the REG bundle of the two TCIs also occupy the same column of the interleaving matrix; and in relation 1, the first half and the second half of the REG bundle corresponding to the first TCI occupy different columns of the interleaving matrix, corresponding to the second TCI The first half of the REG bundle and the second half occupy different columns of the interleaving matrix. And, the first half of the REG bundle corresponding to the first TCI and the second half of the REG bundle corresponding to the second TCI occupy the same columns of the interleaving matrix, the second half of the REG bundle corresponding to the first TCI and the first half of the REG bundle corresponding to the second TCI Parts occupy the same columns of the interleaving matrix. In yet another embodiment, the plurality of REG bundles include N REG bundles, and the first REG bundle includes even-numbered REG bundles in the first N/2 REG bundles in the plurality of REG bundles and The odd-numbered REG bundles in the REG bundles numbered after N/2 in the plurality of REG bundles; the second REG bundles include the odd-numbered REG bundles in the first N/2 REG bundles in the plurality of REG bundles The numbered REG bundles and the even-numbered REG bundles in the REG bundles numbered after N/2 in the plurality of REG bundles.

In yet another embodiment, the plurality of REG bundles include N REG bundles, and in the first association relationship, the first REG bundle includes the first N/3 and the rear of the plurality of REG bundles. The even-numbered REG bundles in the N/3 REG bundles and the odd-numbered REG bundles in the middle N/3 REG bundles in the plurality of REG bundles; the second REG bundle includes the plurality of REGs The odd-numbered REG bundles in the REG bundles numbered in the first N/3 and the latter N/3 bundles and the even-numbered REG bundles in the REG bundles numbered in the middle N/3 in the plurality of REG bundles can refer to In the example of FIG. 9 , one AL16 PDCCH candidate occupies the REG bundle corresponding to the 8 columns in FIG. 9 , where the gray part is the first REG bundle, and the white part is the second REG bundle.

In yet another embodiment, in the first association relationship, the REG bundle number k in the first REG bundle satisfies: (k mod 4)<3, and the REG bundle number k in the second REG bundle satisfies : (k mod 4)≥3 (as shown in Figure 10).

Exemplarily, a REG bundle set is determined from the multiple REG bundles, and the REG bundle set i is composed of REG bundle 2i and REG bundle 2i+1, and the value of i is 0, 1,...(N-2)/2 . Then, the odd-numbered REG bundle set corresponds to the first TCI, and the even-numbered REG bundle set corresponds to the second TCI.

In yet another embodiment, the first REG bundle includes REG bundles numbered 0, . REG bundles for N/2,...,N-1.

In yet another embodiment, the plurality of REG bundles include N REG bundles, and in the first association relationship, the first REG bundle is the REG bundle numbered top N/2 in the plurality of REG bundles , the second REG bundle is the REG bundle numbered N/2 in the plurality of REG bundles. In this embodiment, it can be guaranteed that the mother code and the repetition of the mother code are sent by different TRPs.

For PDCCH candidates of AL8, when the REG bundle size is 2, the non-interleaving method is used to map CCEs to REGs, or the interleaving method is used to map CCEs to REGs and the number of columns of the interleaving matrix is even, and when the REG bundle size is 6, the interleaving method is used. When the CCEs are mapped to the REGs in this way and the number of columns of the interleaving matrix is odd, correlation 1 can ensure that most of the mother code and the corresponding repeated bits are sent by two TRPs respectively, thereby improving the transmission reliability.

As an embodiment, the association relationship is determined according to the number of OFDM symbols occupied by the CORESET. Specifically, when the number of OFDM symbols occupied by the CORESET is 1, the above-mentioned association relationship 0 and association relationship 1 are used. When the number of OFDM symbols occupied by CORESET is 2, association relationship 2 is adopted.

As an embodiment, the association relationship 2 satisfies that the first REG bundle occupies the first OFDM symbol, and the second REG bundle occupies the second OFDM symbol. It should be understood that in the prior art, when a CORESET occupies multiple OFDM symbols, the REs on multiple OFDM symbols corresponding to the same subcarrier all correspond to the same REG bundle, that is, the multiple OFDM symbols of the same subcarrier correspond to the same REG bundle. DMRS REs can be used for joint channel estimation. However, in association relationship 2, if the existing mechanism for determining the resources occupied by a REG bundle is still used, the REs on different OFDM symbols in the same REG bundle will perform channel estimation respectively. In this way, it can be ensured that TRP1 transmits the repetition of all mother codes, and the corresponding mother codes are all transmitted by TRP2, so it is an optimal transmission scheme for DCI reliability.

Optionally, when the association relationship 2 is adopted, the size of the REG bundle is {4,12}, which can also include 2,6. By increasing the configuration of the larger REG bundle size, the channel estimation performance when using correlation 2 can be guaranteed.

Optionally, a REG bundle of size M includes M consecutive REGs in the frequency domain within an OFDM symbol. Exemplarily, as shown in FIG. 4, for M=6, REG bundle 1 includes

REGs

1, 3, 5, 7, 9, 11, and REG bundle 2 includes

REGs

2, 4, 6, 8, 10, and 12. That is to say, the number of REG bundles is in the order of time and frequency. In this way, it can be ensured that when the REG included in the CCE is determined according to the existing mechanism, for the non-interleaved CCE-to-REG mapping, one CCE can include both the resources corresponding to TCI 1 and the resources corresponding to TCI 2.

Optionally, when it is determined that the CCE to REG mapping adopts the interleaving method, the number of REGs corresponding to each matrix element of the interleaving matrix is 2ⅹM, where M is the size of the REG bundle. Each matrix element sequentially corresponds to two consecutively numbered REG bundles.

As shown in FIG. 11 , optionally, when the number of OFDM symbols occupied by CORESET is 3, one of the above-mentioned association relationship 0 and association relationship 1 is used. A is the association relationship 0, and B is the association relationship 1. In one embodiment, the association relationship 1 may also be C. Under the configuration of CORESET in Figure 11, B and C can guarantee the repetition of the mother code and the corresponding mother code is sent by different TRPs, and in other configurations, A can guarantee the same technical effect.

Optionally, when the number of OFDM symbols occupied by CORESET is 3, the adopted association relationship is the same as the case where the number of OFDM symbols occupied by CORESET is 1.

As an embodiment, the CORESET occupies 2 OFDM symbols and the corresponding CCE to REG mapping mode is interleaving, the number of REGs corresponding to each matrix element of the interleaving matrix is 2ⅹM, and M is the size of the REG bundle.

The association relationship in step 1001 may also be indicated by other means, for example, configuring the association relationship of the starting REG bundle, and then configuring the association relationship between the REG bundle in location A and the TCI. The UE may determine the association relationship between the following one or more REG bundles and the TCI according to the association relationship between the initial REG bundle and the TCI, and then receive an association relationship of location A. The association relationship between the REG bundle and the TCI determines the association relationship between the one or more REG bundles following the position A and the TCI.

In one embodiment, the association relationship of the starting REG bundle may not be notified, and the association relationship is default. In another embodiment, it can only notify the position A, the association before the position A and the association after the position A are preset, or different, for example, the association before A is an even-numbered REG bundle corresponding to TCI1 , the odd-numbered REG bundle corresponds to TCI2, and the association after A is that the even-numbered REG bundle corresponds to TCI2, and the odd-numbered REG bundle corresponds to TCI1.

In yet another embodiment, the association relationship of the position A is the association relationship of the default position, for example, the REG bundle that is half of the REG bundle included in the entire CORESET plus one, or the position A is indicated by the indication information.

In yet another embodiment, a plurality of the location information may also be configured, for example, the indices of location A, location B, and location C. The UE determines the default association relationship between several REG bundles and TCI according to the location. For example, if the UE determines the location A, the UE determines the location A and the association relationship between the subsequent REG bundle and the TCI. Of course, the association relationship between the REG bundle and the TCI before the location of these notifications can also be determined. In one embodiment, the index of the location information may be configured by binding with the association relationship.

In yet another embodiment, the location A is also default, and the UE directly determines the association relationship between the REG bundle behind the location A and the TCI according to the configuration information. For example, the default association before A is that the even-numbered REG bundle corresponds to TCI1, and the odd-numbered REG bundle corresponds to TCI2 (referred to as rule 0). The configuration information directly indicates whether the association after A has changed. That is, if the configuration information is set to 0, the association after A is still the even-numbered REG bundle corresponding to TCI1, and the odd-numbered REG bundle corresponding to TCI2 (rule 0 is still used). If the configuration information is set to 1, the association after A is still The even-numbered REG bundle corresponds to TCI2, and the odd-numbered REG bundle corresponds to TCI1 (using rule 1). The above notification method can also be 00, which means that the rule 0 is used before and after the A position; 01 means that the rule 0 is used before the A position, and the rule 1 is used after the A position, and so on. In the presence of position A and position B, multiple bits can be used for notification in the above-described manner, similar to the form of a bitmap.

As an optional embodiment, the method further includes:

Step 1003, the user equipment determines downlink control information according to the detected PDCCH candidates.

According to the methods designed in the above aspects, the corresponding relationship between the REG bundle and different TCIs can be flexibly configured to improve the reliability of transmission. In a multi-TRP scenario, the transmission gain can be further improved.

In the following, another embodiment of the present invention will be introduced with reference to FIG. 13 , and the gain that can be achieved by multi-TRP transmission can be fully utilized in combination with the above-mentioned mapping relationship. This embodiment may be a base station, and may also be replaced by other network devices, or terminals, processors, and the like.

Step 2001, the base station determines the association relationship between multiple resource unit bundles REG bundles and the transmission configuration indication TCI, wherein the multiple REG bundles are REG bundles corresponding to a control resource set CORESET, and among the multiple REG bundles, the first A REG bundle is associated with the first TCI, and a second REG bundle is associated with the second TCI;

Step 2002, the base station sends the physical downlink control channel PDCCH according to the first association relationship. The association relationship in step 2001 has been described in detail in the embodiment shown in FIG. 12 , which will not be repeated here. In this embodiment, some implementations similar to the embodiment shown in FIG. 12 are listed. Way.

In one embodiment, the association relationship is a first association relationship, the first relationship is one of at least two association relationships, and the first association relationship satisfies: the first REG bundle is numbered by an odd number and an even number. The second REG bundle is a REG bundle other than the first REG bundle, wherein the multiple REG bundles are numbered in the order from small to large or from large to small in the frequency domain, so The number of REG bundles included in the first REG bundle and the second REG bundle is the same.

In yet another embodiment, the first association relationship satisfies: the maximum value of the even number in the first REG bundle is less than the minimum value of the odd number in the first REG bundle; the odd number in the second REG bundle is The maximum value of the number is less than the minimum value of the even number.

In yet another embodiment, the multiple REG bundles include N REG bundles, and the first association relationship satisfies: the first REG bundle includes the REG bundles numbered first N/2 in the multiple REG bundles The odd-numbered REG bundles in the even-numbered REG bundles and the odd-numbered REG bundles in the back N/2 REG bundles in the plurality of REG bundles; the second REG bundles include the first N in the plurality of REG bundles. The odd-numbered REG bundles in the REG bundles of /2 and the even-numbered REG bundles in the REG bundles numbered after N/2 in the plurality of REG bundles. In yet another embodiment, the multiple REG bundles include N REG bundles, and the first association relationship satisfies: the first REG bundle includes the first N/3 and the last N in the multiple REG bundles. The even-numbered REG bundles in the REG bundles of /3 and the odd-numbered REG bundles in the REG bundles numbered in the middle N/3 of the plurality of REG bundles; the second REG bundle includes the plurality of REG bundles The odd-numbered REG bundles in the REG bundles numbered in the first N/3 and the latter N/3, and the even-numbered REG bundles in the REG bundles numbered in the middle N/3 of the plurality of REG bundles.

In yet another embodiment, the first association relationship satisfies: the REG bundle number k in the first REG bundle satisfies: (k mod 4)<3, and the REG bundle number k in the second REG bundle satisfies: (k mod 4)≥3.

In yet another embodiment, the plurality of REG bundles include N REG bundles, and the first association relationship satisfies: the first REG bundle is the REG bundle numbered before N/2 in the plurality of REG bundles, The second REG bundle is the REG bundle numbered N/2 in the plurality of REG bundles.

In yet another embodiment, the at least two association relationships further include a second association relationship, and the second association relationship satisfies: the first REG bundle is composed of odd-numbered REG bundles, and the second REG bundle Consists of even-numbered REG bundles.

In yet another embodiment, the method further includes: the base station sending configuration information, the configuration information indicating the first association information.

In yet another embodiment, the CORESET is composed of multiple REG bundles, and the numbers of the multiple REG bundles are consecutive; or, the multiple REG bundles correspond to one or more PDCCH candidates associated with the CORESET, when The mapping mode of the CCE corresponding to the CORESET to the REG is non-interleaving, and the numbers of the multiple REG bundles are consecutive; when the mapping mode of the CCE corresponding to the CORESET to the REG is interleaving, the multiple REG bundles are The numbering of the segments is consecutive, and the number of segments is associated with the number of rows of the interleaving matrix.

In yet another embodiment, the CORESET occupies 2 OFDM symbols and the corresponding mapping method from CCE to REG is interleaving, the number of REGs corresponding to each matrix element of the interleaving matrix is 2ⅹM, and M is the size of the REG bundle.

The device embodiments of the present application will be described below with reference to FIGS. 14 to 17 . These apparatuses can be used to implement the functions of the terminal device or the network device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of the present application, the communication apparatus may be a terminal device or a network device, and may also be a module (eg, a chip) applied to the terminal device or the network device.

Hereinafter, another embodiment of the present invention will be introduced with reference to FIG. 14, and the gain that can be achieved by multi-TRP transmission can be fully utilized in combination with the above-mentioned mapping relationship. The implementation may be a terminal device, or a chip or a processor.

Determining unit 3001, configured to determine the association relationship between multiple resource unit bundles REG bundles and the transmission configuration indication TCI, wherein the multiple REG bundles are REG bundles corresponding to a control resource set CORESET, and among the multiple REG bundles , the first REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI;

The detection unit 3002 is configured to detect the physical downlink control channel PDCCH candidate corresponding to the CORESET according to the determined association relationship.

In one embodiment, a receiving unit 3003 is further included, configured to receive configuration information, where the configuration information indicates the association relationship.

The manner of determining the association relationship, the resource distribution and the detailed explanation may refer to the embodiment shown in FIG. 12 , which will not be repeated here. The determining unit determines that the association relationship is a first association relationship, the first relationship is one of at least two association relationships, and the first association relationship satisfies: the first REG bundle is numbered by an odd number and an even number. The second REG bundle is a REG bundle other than the first REG bundle, wherein the multiple REG bundles are numbered in the order from small to large or from large to small in the frequency domain, so The number of REG bundles included in the first REG bundle and the second REG bundle is the same.

Hereinafter, another embodiment of the present invention will be introduced with reference to FIG. 15 , and the gain that can be achieved by multi-TRP transmission can be fully utilized in combination with the above-mentioned mapping relationship. The implementation may be a base station, or a chip or a processor.

A determination unit 4001, configured to determine the association relationship between multiple resource unit bundles REG bundles and the transmission configuration indication TCI, wherein the multiple REG bundles are REG bundles corresponding to a control resource set CORESET, and among the multiple REG bundles , the first REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI;

The sending unit 4002 is configured to send the physical downlink control channel PDCCH according to the first association relationship.

The sending unit 4002 is further configured to send configuration information, where the configuration information indicates the first association information.

The manner of determining the association relationship, the resource distribution and the detailed explanation may refer to the embodiment shown in FIG. 12 or FIG. 13 , and details are not repeated here. The determining unit 4002 is further configured to determine that the association relationship is a first association relationship, the first relationship is one of at least two association relationships, and the first association relationship satisfies: the first REG bundle is numbered by It is composed of odd-numbered and even-numbered REG bundles, and the second REG bundle is a REG bundle other than the first REG bundle, wherein the multiple REG bundles are from small to large or from large to small according to the frequency domain. Sequential numbering, the number of REG bundles included in the first REG bundle and the second REG bundle is the same.

FIG. 16 is a schematic structural diagram of a communication apparatus provided by another embodiment of the present application. As shown in FIG. 16 , the communication apparatus 500 includes a processor 501 and an interface circuit 502 . The processor 501 and the interface circuit 502 are coupled to each other. It can be understood that the interface circuit 502 can be a transceiver or an input-output interface. Optionally, the communication apparatus 500 may further include a memory 503 for storing instructions executed by the processor 501 or input data required by the processor 501 to execute the instructions or data generated after the processor 501 executes the instructions. In a factual manner, the memory may store the above-mentioned association relationship.

When the communication apparatus 500 is used to implement the above method embodiments, the processor 501 is used to execute the functions of the above processing unit 3001 and/or the detection unit 3002, and the interface circuit 502 is used to execute the functions of the above receiving unit 3003. Alternatively, when the communication apparatus 500 is used to implement the above method embodiments, the processor 501 is used to perform the function of the above determination unit 4001, and the interface circuit 502 is used to perform the function of the above transmission unit 4002. It should be understood that the interface circuit can also be replaced with other transceivers, and in addition, the pins or metal contacts of the processor with the transceiver function can also perform the functions of the above-mentioned transceiver unit or receiving unit.

When the above communication device is a chip applied to a terminal device, the chip implements the functions of the terminal device in the above method embodiments. The chip receives information from other modules (such as radio frequency modules or antennas) in the terminal device, and the information is sent to the terminal device by other network elements; or, the chip sends information to other modules in the terminal device (such as radio frequency modules or antennas) information, which is sent by the terminal device to other network elements.

FIG. 17 is a schematic structural diagram of a communication apparatus provided by another embodiment of the present application. As shown in FIG. 17 , the communication apparatus 600 includes a processor 601 and an interface circuit 602 . The processor 601 and the interface circuit 602 are coupled to each other. It can be understood that the interface circuit 602 can be a transceiver or an input-output interface. Optionally, the communication apparatus 600 may further include a memory 603 for storing instructions executed by the processor 601 or input data required by the processor 601 to execute the instructions or data generated after the processor 601 executes the instructions.

When the communication device 600 is used to implement the above method embodiments, the processor 601 is used to perform the functions of the above processing unit 3001, the detection unit 3002 or the determination unit 4001, and the interface circuit 602 is used to perform the functions of the above receiving unit 3003 and the sending unit 4002. Features.

When the above communication device is a chip applied to a network device, the chip implements the functions of the network device in the above method embodiments. The chip receives information from other modules (such as radio frequency modules or antennas) in the network equipment, and the information is sent to the network equipment by other network elements; or, the chip sends information to other modules (such as radio frequency modules or antennas) in the network equipment information, which is sent by the network device to other network elements.

In addition, an embodiment of the present application also provides a communication apparatus, the apparatus includes at least one processor and at least one memory, the at least one processor is coupled to the at least one memory, and the at least one processor is configured to execute the A computer program or instruction stored in at least one memory, so that the communication apparatus executes the method in each of the above method embodiments.

Optionally, the at least one memory stores at least part of the triples in the mapping relationship table as in Table 1 to Table 4 in the detailed description section.

The present invention also provides a communication system, which is composed of a network device and a user equipment, wherein the network device may be the above-mentioned base station and/or the user equipment may be the above-mentioned user equipment.

It can be understood that the 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 Processor, 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. 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 can be composed of corresponding software modules, and software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM) , PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), registers, hard disks, removable hard disks, CD-ROMs or known in the art in any other form of storage medium. An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium may reside in an ASIC. Alternatively, the ASIC may be located in the end device. Of course, the processor and the storage medium may also exist in the terminal device as discrete components.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in 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. When the computer program or instructions are loaded and executed on a computer, 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, or other programmable device. The computer program or instructions may be stored in or transmitted over a computer-readable storage medium. The computer-readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server that integrates one or more available media. The usable media can be magnetic media, such as floppy disks, hard disks, magnetic tapes; optical media, such as DVD; and semiconductor media, such as solid state disks (SSD).

In the various embodiments of the present application, if there is no special description or logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referred to each other, and the technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

In this application, "at least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. In the text description of this application, 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.

It can be understood that, the various numbers and numbers involved in the embodiments of the present application are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the sequence numbers of the above processes does not imply the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, 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.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, 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 functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A communication method, comprising:

The user equipment determines the association relationship between multiple resource unit bundles REG bundles and the transmission configuration indication TCI, where the multiple REG bundles are REG bundles corresponding to a control resource set CORESET, and among the multiple REG bundles, the first REG The bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI;

The user equipment detects the physical downlink control channel PDCCH candidate corresponding to the CORESET according to the determined association relationship.
The method according to claim 1, wherein the association relationship is a first association relationship, the first relationship is one of at least two association relationships, and the first association relationship satisfies:

The first REG bundle is composed of odd-numbered and even-numbered REG bundles, and the second REG bundle is a REG bundle other than the first REG bundle, wherein the multiple REG bundles are composed of small and small REG bundles according to the frequency domain. Numbered in ascending order or in descending order, the number of REG bundles included in the first REG bundle and the second REG bundle is the same.
The method according to claim 2, wherein the first association relationship satisfies: the maximum value of even numbers in the first REG bundle is smaller than the minimum value of odd numbers in the first REG bundle; the The odd-numbered maximum value in the second REG bundle is less than the even-numbered minimum value.
The method according to claim 2 or 3, wherein the multiple REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle includes the even-numbered REG bundles in the first N/2 REG bundles in the multiple REG bundles and the odd-numbered REG bundles in the latter N/2 REG bundles in the multiple REG bundles The numbered REG bundle; the second REG bundle includes the odd-numbered REG bundles in the REG bundles numbered as the first N/2 in the multiple REG bundles and the REG bundles numbered as the latter N/2 in the multiple REG bundles An even numbered REG bundle within a REG bundle.
The method according to claim 2, wherein the multiple REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle includes the even-numbered REG bundles in the REG bundles numbered as the first N/3 and the latter N/3 among the multiple REG bundles and the middle N/3 REG bundles in the multiple REG bundles. an odd-numbered REG bundle in a REG bundle; the second REG bundle includes an odd-numbered REG bundle in the REG bundles numbered first N/3 and last N/3 in the plurality of REG bundles and the plurality of REG bundles The even-numbered REG bundles in the middle N/3 REG bundles in the REG bundle.
The method according to claim 2, wherein the first association relationship satisfies:

The REG bundle number k in the first REG bundle satisfies: (k mod 4)<3, and the REG bundle number k in the second REG bundle satisfies: (k mod 4)≥3.
The method according to claim 2, wherein the multiple REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle is the REG bundle numbered before N/2 among the multiple REG bundles, and the second REG bundle is the REG bundle numbered N/2 after the multiple REG bundles.
The method according to claim 2, wherein the at least two association relationships further include a second association relationship, and the second association relationship satisfies:

The first REG bundle is composed of odd-numbered REG bundles, and the second REG bundle is composed of even-numbered REG bundles.
The method according to any one of claims 1 to 8, wherein the method further comprises: the user equipment receiving configuration information, the configuration information indicating the association relationship.
The method according to any one of claims 1 to 9, wherein the CORESET is composed of multiple REG bundles, and the numbers of the multiple REG bundles are consecutive; or,

The multiple REG bundles correspond to one or more PDCCH candidates associated with the CORESET, and when the CCE-to-REG mapping mode corresponding to the CORESET is non-interleaved, the numbers of the multiple REG bundles are consecutive; The mapping mode of the CCE corresponding to the CORESET to the REG is interleaving, the numbers of the multiple REG bundles are consecutive in segments, and the number of segments is associated with the number of rows of the interleaving matrix.
The method according to claims 1 to 10, wherein the CORESET occupies 2 OFDM symbols and the corresponding mapping method from CCE to REG is interleaving, the number of REGs corresponding to each matrix element of the interleaving matrix is 2ⅹM, and M is the REG bundle the size of.
A communication method, comprising:

The base station determines the association relationship between multiple resource unit bundles REG bundles and the transmission configuration indication TCI, wherein the multiple REG bundles are REG bundles corresponding to a control resource set CORESET, and among the multiple REG bundles, the first REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI;

The base station sends the physical downlink control channel PDCCH according to the first association relationship.
The method according to claim 12, wherein the association relationship is a first association relationship, the first relationship is one of at least two association relationships, and the first association relationship satisfies:

The first REG bundle is composed of odd-numbered and even-numbered REG bundles, and the second REG bundle is a REG bundle other than the first REG bundle, wherein the multiple REG bundles are composed of small and small REG bundles according to the frequency domain. Numbered in ascending order or in descending order, the number of REG bundles included in the first REG bundle and the second REG bundle is the same.
The method according to claim 13, wherein the first association relationship satisfies: the maximum value of even numbers in the first REG bundle is smaller than the minimum value of odd numbers in the first REG bundle; the The odd-numbered maximum value in the second REG bundle is less than the even-numbered minimum value.
The method according to claim 13, wherein the multiple REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle includes the even-numbered REG bundles in the first N/2 REG bundles in the multiple REG bundles and the odd-numbered REG bundles in the latter N/2 REG bundles in the multiple REG bundles The numbered REG bundle; the second REG bundle includes the odd-numbered REG bundles in the REG bundles numbered as the first N/2 in the multiple REG bundles and the REG bundles numbered as the latter N/2 in the multiple REG bundles An even numbered REG bundle within a REG bundle.
The method according to claim 13, wherein the multiple REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle includes the even-numbered REG bundles in the REG bundles numbered as the first N/3 and the latter N/3 among the multiple REG bundles and the middle N/3 REG bundles in the multiple REG bundles. an odd-numbered REG bundle in a REG bundle; the second REG bundle includes an odd-numbered REG bundle in the REG bundles numbered first N/3 and last N/3 in the plurality of REG bundles and the plurality of REG bundles The even-numbered REG bundles in the middle N/3 REG bundles in the REG bundle.
The method according to claim 13, wherein the first association relationship satisfies:

The REG bundle number k in the first REG bundle satisfies: (k mod 4)<3, and the REG bundle number k in the second REG bundle satisfies: (k mod 4)≥3.
The method according to claim 13, wherein the multiple REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle is the REG bundle numbered before N/2 among the multiple REG bundles, and the second REG bundle is the REG bundle numbered N/2 after the multiple REG bundles.
The method according to claim 13, wherein the at least two association relationships further include a second association relationship, and the second association relationship satisfies:

The first REG bundle is composed of odd-numbered REG bundles, and the second REG bundle is composed of even-numbered REG bundles.
The method according to any one of claims 12 to 19, wherein the method further comprises: the base station sending configuration information, the configuration information indicating the first association information.
The method according to any one of claims 12 to 20, wherein the CORESET is composed of multiple REG bundles, and the numbers of the multiple REG bundles are consecutive; or,

The multiple REG bundles correspond to one or more PDCCH candidates associated with the CORESET, and when the CCE-to-REG mapping mode corresponding to the CORESET is non-interleaved, the numbers of the multiple REG bundles are consecutive; The mapping mode of the CCE corresponding to the CORESET to the REG is interleaving, the numbers of the multiple REG bundles are consecutive in segments, and the number of segments is associated with the number of rows of the interleaving matrix.
The method according to any one of claims 12 to 21, wherein the CORESET occupies 2 OFDM symbols and the corresponding mapping method from CCEs to REGs is interleaving, and the number of REGs corresponding to each matrix element of the interleaving matrix is 2ⅹM, M is the size of the REG bundle.
A communication device, comprising:

A determination unit, used to determine the association relationship between multiple resource unit bundles REG bundles and the transmission configuration indication TCI, wherein the multiple REG bundles are REG bundles corresponding to a control resource set CORESET, and among the multiple REG bundles, The first REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI;

A detection unit, configured to detect the physical downlink control channel PDCCH candidate corresponding to the CORESET according to the determined association relationship.
The communication device according to claim 23, wherein the association relationship is a first association relationship, the first relationship is one of at least two association relationships, and the first association relationship satisfies:

The first REG bundle is composed of odd-numbered and even-numbered REG bundles, and the second REG bundle is a REG bundle other than the first REG bundle, wherein the multiple REG bundles are composed of small and small REG bundles according to the frequency domain. Numbered in ascending order or in descending order, the number of REG bundles included in the first REG bundle and the second REG bundle is the same.
The communication device according to claim 24, wherein the first association relationship satisfies: the maximum value of the even numbers in the first REG bundle is smaller than the minimum value of the odd numbers in the first REG bundle; the The odd-numbered maximum value in the second REG bundle is less than the even-numbered minimum value.
The communication device according to claim 24, wherein the plurality of REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle includes the even-numbered REG bundles in the first N/2 REG bundles in the multiple REG bundles and the odd-numbered REG bundles in the latter N/2 REG bundles in the multiple REG bundles The numbered REG bundle; the second REG bundle includes the odd-numbered REG bundles in the REG bundles numbered as the first N/2 in the multiple REG bundles and the REG bundles numbered as the latter N/2 in the multiple REG bundles An even numbered REG bundle within a REG bundle.
The communication device according to claim 24, wherein the plurality of REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle includes the even-numbered REG bundles in the REG bundles numbered as the first N/3 and the latter N/3 among the multiple REG bundles and the middle N/3 REG bundles in the multiple REG bundles. an odd-numbered REG bundle in a REG bundle; the second REG bundle includes an odd-numbered REG bundle in the REG bundles numbered first N/3 and last N/3 in the plurality of REG bundles and the plurality of REG bundles The even-numbered REG bundles in the middle N/3 REG bundles in the REG bundle.
The communication device according to claim 24, wherein the first association relationship satisfies:

The REG bundle number k in the first REG bundle satisfies: (k mod 4)<3, and the REG bundle number k in the second REG bundle satisfies: (k mod 4)≥3.
The communication device according to claim 24, wherein the plurality of REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle is the REG bundle numbered before N/2 among the multiple REG bundles, and the second REG bundle is the REG bundle numbered N/2 after the multiple REG bundles.
The communication device according to claim 24, wherein the at least two association relationships further include a second association relationship, and the second association relationship satisfies:

The first REG bundle is composed of odd-numbered REG bundles, and the second REG bundle is composed of even-numbered REG bundles.
The communication device according to any one of claims 23 to 30, further comprising: a receiving unit, configured to receive configuration information, wherein the configuration information indicates the association relationship.
The communication device according to any one of claims 23 to 31, wherein the CORESET is composed of multiple REG bundles, and the numbers of the multiple REG bundles are consecutive; or,

The multiple REG bundles correspond to one or more PDCCH candidates associated with the CORESET, and when the CCE-to-REG mapping mode corresponding to the CORESET is non-interleaved, the numbers of the multiple REG bundles are consecutive; The mapping mode of the CCE corresponding to the CORESET to the REG is interleaving, the numbers of the multiple REG bundles are consecutive in segments, and the number of segments is associated with the number of rows of the interleaving matrix.
The communication device according to claims 23 to 32, wherein the CORESET occupies 2 OFDM symbols and the corresponding mapping method of CCEs to REGs is interleaving, the number of REGs corresponding to each matrix element of the interleaving matrix is 2ⅹM, and M is REG The size of the bundle.
A communication device, characterized in that it includes:

A determination unit, used to determine the association relationship between multiple resource unit bundles REG bundles and the transmission configuration indication TCI, wherein the multiple REG bundles are REG bundles corresponding to a control resource set CORESET, and among the multiple REG bundles, The first REG bundle is associated with the first TCI, and the second REG bundle is associated with the second TCI;

A sending unit, configured to send a physical downlink control channel PDCCH according to the first association relationship.
The communication device according to claim 34, wherein the association relationship is a first association relationship, the first relationship is one of at least two association relationships, and the first association relationship satisfies:

The first REG bundle is composed of odd-numbered and even-numbered REG bundles, and the second REG bundle is a REG bundle other than the first REG bundle, wherein the multiple REG bundles are composed of small and small REG bundles according to the frequency domain. Numbered in ascending order or in descending order, the number of REG bundles included in the first REG bundle and the second REG bundle is the same.
The communication device according to claim 35, wherein the first association relationship satisfies: the maximum value of the even numbers in the first REG bundle is smaller than the minimum value of the odd numbers in the first REG bundle; the The odd-numbered maximum value in the second REG bundle is less than the even-numbered minimum value.
The communication device according to claim 35, wherein the plurality of REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle includes the even-numbered REG bundles in the first N/2 REG bundles and the odd-numbered REG bundles in the latter N/2 REG bundles in the multiple REG bundles The numbered REG bundle; the second REG bundle includes the odd-numbered REG bundles in the REG bundles numbered as the first N/2 in the multiple REG bundles and the REG bundles numbered as the latter N/2 in the multiple REG bundles An even numbered REG bundle within a REG bundle.
The communication device according to claim 35, wherein the plurality of REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle includes the even-numbered REG bundles in the REG bundles numbered the first N/3 and the rear N/3 among the plurality of REG bundles and the middle N/3 REG bundles in the plurality of REG bundles. an odd-numbered REG bundle in a REG bundle; the second REG bundle includes an odd-numbered REG bundle in the REG bundles numbered first N/3 and last N/3 in the plurality of REG bundles and the plurality of REG bundles The even-numbered REG bundle in the middle N/3 REG bundle in the REG bundle.
The communication device according to claim 35, wherein the first association relationship satisfies:

The REG bundle number k in the first REG bundle satisfies: (k mod 4)<3, and the REG bundle number k in the second REG bundle satisfies: (k mod 4)≥3.
The communication device according to claim 35, wherein the plurality of REG bundles include N REG bundles, and the first association relationship satisfies:

The first REG bundle is the REG bundle numbered before N/2 among the multiple REG bundles, and the second REG bundle is the REG bundle numbered N/2 after the multiple REG bundles.
The communication device according to claim 35, wherein the at least two association relationships further include a second association relationship, and the second association relationship satisfies:

The first REG bundle is composed of odd-numbered REG bundles, and the second REG bundle is composed of even-numbered REG bundles.
The communication device according to any one of claims 34 to 41, wherein the sending unit is further configured to send configuration information, wherein the configuration information indicates the first association information.
The communication device according to any one of claims 34 to 42, wherein the CORESET is composed of multiple REG bundles, and the numbers of the multiple REG bundles are consecutive; or,

The multiple REG bundles correspond to one or more PDCCH candidates associated with the CORESET, and when the CCE-to-REG mapping mode corresponding to the CORESET is non-interleaved, the numbers of the multiple REG bundles are consecutive; The mapping mode of the CCE corresponding to the CORESET to the REG is interleaving, the numbers of the multiple REG bundles are consecutive in segments, and the number of segments is associated with the number of rows of the interleaving matrix.
The communication device according to claims 34 to 43, wherein the CORESET occupies 2 OFDM symbols and the corresponding mapping method from CCE to REG is interleaving, the number of REGs corresponding to each matrix element of the interleaving matrix is 2ⅹM, and M is REG The size of the bundle.