WO2021088266A1 - Multipoint transmission beam indication method and device - Google Patents

Abstract

Disclosed in the present application are a multipoint transmission beam indication method and a device. The method comprises the following steps: a time interval between downlink control information and a scheduled downlink data channel is less than a threshold; a beam of the minimum CORSET ID in a time unit closest to the downlink data channel is selected as a first beam direction; a terminal device determines, according to a TCI state activated by an MAC control unit and the first beam direction, a beam direction for receiving a downlink data channel of a first transmission opportunity or a second transmission opportunity; and a network device determines, according to the TCI state activated by the MAC control unit and the first beam direction, a beam direction for transmitting the downlink data channel of the first transmission opportunity or the second transmission opportunity. The present application further provides a terminal device, a network device, and a system which use the method. The solution of the present application solves the problem of, in the case of multipoint transmission beams, how to select a beam when an offset between a downlink control channel and a PDSCH scheduled thereby is less than a threshold.

Description

Method and equipment for multipoint transmission beam indication

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 201911090542.1, and the invention title is "a method and device for multipoint transmission beam indication" on November 8, 2019. The entire content is incorporated into this application by reference.

Technical field

This application relates to the field of mobile communication technology, and in particular to a method for multipoint transmission beam indication and a device applying the same.

Background technique

For systems that use high-frequency transmission, the uplink and downlink control channels can use analog beamforming transmission to achieve higher beamforming gain and greater coverage. The radio resources used for the downlink control channel are semi-statically divided into multiple control resource sets (CORSET), and each CORSET contains multiple PDCCH radio resources. The base station can semi-statically configure a transmit beam direction for each CORSET, and different CORSETs can configure beams in different directions, and the base station can perform dynamic switching in different CORSETs, thereby realizing dynamic switching of beams. When transmitting the PDCCH, the base station can select the CORSET of the appropriate beam direction according to the information of the terminal equipment. At the receiving end, the terminal equipment performs blind inspection in the multiple CORSETs configured. For the candidate CORSET, the terminal device will use the receiving beam corresponding to the CORSET transmitting beam to receive.

In the system design, the time gap between the PDCCH and the scheduled PDSCH can be configured to a larger range. An important problem related to the dynamic analog beam is that a certain time gap is required between the PDCCH and the PDSCH. Since the PDCCH contains the indication information for the PDSCH transmission beam, this gap is used to realize the decoding of the PDCCH and the conversion from the analog beamforming of the PDCCH to the analog beamforming of the PDSCH. The decoding of the PDCCH requires a certain amount of time. In the process of demodulating and decoding the PDCCH by the terminal device, if the gap between the PDSCH and the PDCCH is small, the terminal device cannot obtain the transmission beam indication information for receiving the PDSCH. In order to receive PDSCH information, a threshold is defined in the standard for distinguishing completion or incomplete PDCCH demodulation and decoding. If the length of the time slot between the PDCCH and the PDSH is less than the threshold, the terminal device starts to receive the PDSCH before the PDCCH demodulation and decoding is completed, and cannot obtain the beam indication from the PDCCH. At this time, the PDSCH can be received by a default beam. This default receiving beam has nothing to do with the beam indication sent by the PDCCH, but uses the same receiving beam as the PDCCH, that is, the PDCCH and PDSCH use the same receiving beam in this time period. When the gap between the PDCCH and the PDSCH is greater than the threshold, the beam indicated by the PDCCH can be used to receive the PDSCH.

In the NR Rel-15 version, the Transmission configuration indication in the downlink control information DCI 1_1. When tci-PresentInDCI is configured as enabled, the length of this field is 3 bits, indicating the index of the TCI status of the PDSCH, corresponding to the MAC The maximum 8 TCI states in CE (MAC layer control unit), when tci-PresentInDCI is not configured, the field length is 0. When tci-PresentInDCI is not configured or the PDSCH scheduled by DCI 1_0 is used, the received beam is the same as the PDCCH beam of the lowest CORSET ID in the nearest time slot.

There is a problem:

In the case of multiple TRPs and URLLCs, since the main requirement of URLLC services is low latency, how to deal with when the offset between the downlink control channel and its scheduled PDSCH is less than the threshold is a very important aspect. The assumption of the receiving beam used by the data in this case is more important.

For URLLC scheme 3, the base station uses the downlink control channel to indicate the position of the first transmission opportunity, the second transmission opportunity is the K symbol offset of the first transmission opportunity, and the length is the same as the first transmission opportunity. In addition, the number of specific transmission opportunities in scheme 3 depends on the number of TCI status indications in the downlink control channel. If the number of TCI status indications is 1, the number of transmission opportunities is 1, and if the number of TCI status indications is 2, then the transmission timings The number is 2.

Because the scheduling granularity of URLLC services is very small, even reaching the symbol level, to obtain a very low delay, and at the same time to obtain reliability, support the TDM repetition mechanism in the time slot. That is, the repetition of multiple mini-slots of the PDSCH in a time slot, the beam diversity gain is obtained by repeating the PDSCH using different TCI states to counter the channel blocking characteristics and further enhance the reliability. When the offset of the downlink control channel and PDSCH is less than the threshold, how to define the default QCL beam mechanism in scheme 3 is very important.

Summary of the invention

The embodiments of the present application provide a method and device for multipoint transmission beam indication to solve the problem of how to select beams when the offset between the downlink control channel and its scheduled PDSCH is less than a threshold in the case of multipoint transmission beams.

In the first aspect, an embodiment of the present application proposes a method for multipoint transmission beam indication, which includes the following steps:

The time interval between the downlink control information and the scheduled downlink data channel is less than the threshold;

The beam with the lowest CORSET ID in the time unit closest to the downlink data channel is selected as the first beam direction.

Further, the downlink control channel includes indication information indicating the symbol position of the first transmission opportunity.

Further, the method of the present application is used for terminal equipment, MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the at least 1 set of TCI states If one group of TCI states with the smallest TCI code includes one TCI state, the downlink data channel of the first transmission opportunity is received in the first beam direction;

Alternatively, the MAC CE activates 8 groups of TCI states, when the first beam direction is in at least 1 group of TCI states of the 8 groups of TCI states, and among the at least 1 group of TCI states, in 1 group of TCI states with the smallest TCI code If two TCI states are included, the downlink data channel of the first transmission opportunity is received in the beam direction indicated by the first TCI state, and the downlink data channel of the second transmission opportunity is received in the beam direction indicated by the second TCI state. Data channel; wherein the first beam direction is the beam direction indicated by the first TCI, or the first beam direction is the beam direction indicated by the second TCI;

Alternatively, the MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any of the 8 groups of TCI states, the downlink data of the first transmission opportunity is received in the first beam direction channel.

Further, the method of this application is used for network equipment, MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the at least 1 set of TCI states If one group of TCI states with the smallest TCI code includes one TCI state, the downlink data channel of the first transmission opportunity is sent in the first beam direction;

Alternatively, the downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states And the one group of TCI states with the smallest TCI code among the at least one group of TCI states includes two TCI states, then the downlink data channel of the first transmission opportunity is sent in the beam direction indicated by the first TCI state, The downlink data channel of the second transmission opportunity is sent in the beam direction indicated by the second TCI state; wherein, the first beam direction is the beam direction indicated by the first TCI, or the first beam The direction is the beam direction indicated by the second TCI;

Alternatively, the MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any one of the 8 groups of TCI states, the downlink data of the first transmission opportunity is sent in the first beam direction channel.

In any method embodiment of the present application, preferably, the uplink control information includes indication information used to indicate the beam direction for sending or receiving the downlink data channel.

In the second aspect, an embodiment of the present application also proposes a terminal device, using the method of any one of the embodiments of the present application, and the terminal device is used to:

Receiving downlink control information, where the time interval between the downlink control information and the scheduled downlink data channel is less than a threshold;

The beam with the lowest CORSET ID in the time unit closest to the downlink data channel is selected as the first beam direction.

Preferably, the terminal device is further configured to identify indication information in the downlink control channel, and determine the symbol position of the first transmission opportunity.

Further, the MAC CE activates 8 groups of TCI states, when the first beam direction is in at least 1 group of TCI states of the 8 groups of TCI states, and a group of TCI states with the smallest TCI code among the at least 1 group of TCI states Contains 1 TCI state, then the downlink data channel of the first transmission opportunity is received in the first beam direction;

Alternatively, the MAC CE activates 8 groups of TCI states, when the first beam direction is in at least 1 group of TCI states of the 8 groups of TCI states, and among the at least 1 group of TCI states, in 1 group of TCI states with the smallest TCI code If two TCI states are included, the downlink data channel of the first transmission opportunity is received in the beam direction indicated by the first TCI state, and the downlink data channel of the second transmission opportunity is received in the beam direction indicated by the second TCI state. Data channel.

Alternatively, the MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any of the 8 groups of TCI states, the downlink data of the first transmission opportunity is received in the first beam direction channel.

Further, the mobile terminal is also used to send uplink control information, and the uplink control information includes indication information used to indicate a beam direction for receiving the downlink data channel.

An embodiment of the present application also provides a terminal device, including: a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the computer program is executed by the processor. Apply for any step of the method described in the embodiment.

In the third aspect, the embodiments of the present application also propose a network device, using the method of any one of the embodiments of the present application, and the network device is used to:

Sending downlink control information, where the time interval between the downlink control information and the scheduled downlink data channel is less than a threshold;

The beam with the lowest CORSET ID in the time unit (for example, time slot) closest to the downlink data channel is selected as the first beam direction.

Preferably, the network device is further configured to send downlink control information, and the downlink control channel includes indication information indicating the symbol position of the first transmission opportunity.

Further, the MAC CE activates 8 groups of TCI states, when the first beam direction is in at least 1 group of TCI states of the 8 groups of TCI states, and a group of TCI states with the smallest TCI code among the at least 1 group of TCI states Contains 1 TCI state, then the downlink data channel of the first transmission opportunity is received in the first beam direction;

Alternatively, the MAC CE activates 8 groups of TCI states, when the first beam direction is in at least 1 group of TCI states of the 8 groups of TCI states, and among the at least 1 group of TCI states, in 1 group of TCI states with the smallest TCI code If two TCI states are included, the downlink data channel of the first transmission opportunity is received in the beam direction indicated by the first TCI state, and the downlink data channel of the second transmission opportunity is received in the beam direction indicated by the second TCI state. Data channel

Alternatively, the MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any of the 8 groups of TCI states, the downlink data of the first transmission opportunity is received in the first beam direction channel.

Further, the network device is further configured to receive uplink control information, where the uplink control information includes indication information used to indicate a beam direction for sending the downlink data channel.

An embodiment of the present application also proposes a network device, including: a memory, a processor, and a computer program stored on the memory and capable of running on the processor. Apply for any step of the method described in the embodiment.

In a fourth aspect, this application proposes a mobile communication system, which is characterized in that it includes at least one terminal device as described in any of the embodiments of this application and at least one network device as described in any of the embodiments of this application. equipment.

In a fifth aspect, the present application also proposes a computer-readable medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the present application are implemented .

The foregoing at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

This solution solves the problem of how to select the beam when the offset between the downlink control channel and its scheduled PDSCH is less than the threshold in the case of multipoint transmission beams. It can ensure data repetition and beam diversity gain, thereby obtaining high reliability.

Description of the drawings

Figure 1 is a flowchart of an embodiment of the method of this application;

Figure 2 is a schematic diagram of an embodiment of a terminal device of this application;

Figure 3 is a schematic diagram of an embodiment of a network device of this application;

4 is a schematic structural diagram of a network device according to another embodiment of the present invention;

Fig. 5 is a block diagram of a terminal device according to another embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a flowchart of an embodiment of the method of this application.

The embodiment of the present application proposes a method for multipoint transmission beam indication, which includes the following steps:

Step 101: The time interval between the downlink control information and the scheduled downlink data channel is less than a threshold.

For example, the time interval between the downlink control information received by the terminal and the scheduled downlink data is less than the threshold.

Step 102: Select the beam with the lowest CORSET ID in the time unit closest to the downlink data channel as the first beam direction.

For example, when the terminal receives the downlink PDSCH, the default reference beam is the beam with the lowest CORSET ID of the most recent time unit. The downlink control channel is detected to obtain a first beam direction, where the first beam direction is the beam direction with the lowest CORSET ID in the closest time unit to the resource of the downlink data channel.

Step 103: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity.

According to the symbol position of the first transmission opportunity and the preset offset value, the symbol position of the second transmission opportunity can be determined.

Step 104: The terminal device determines the beam direction of the downlink data channel for receiving the first transmission opportunity or the second transmission opportunity according to the TCI state and the first beam direction activated by the MAC CE.

The method of this application is applied to a terminal device, and any one of the following steps 104A to D is executed.

Step 104A. The MAC CE activates 8 sets of TCI states. When the first beam direction is in the 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states includes 1 TCI state, then it is in the first beam Direction to receive the downlink data channel of the first transmission opportunity;

The terminal detects the eight TCI states activated by the MAC CE, and the downlink control channel also indicates the symbol position of the first transmission opportunity. When the obtained first beam direction is in the eight TCI states activated by the MAC CE, and the TCI state If a TC state is indicated, the terminal only receives the data of the first transmission opportunity.

For example, as shown in Table 1, when the first beam detected by the terminal is T3 and the eight TCI states activated by MAC CE include T3, the terminal uses the beam direction indicated by T3 to detect the first transmission opportunity Information, and only detect the information of the first transmission opportunity.

Table 1 TCI state configuration table

TCI code TCI status 000 T3 001 T0&T1 010 T6 011 T9 100 T11&T12 101 T15 110 T17 111 T23&T24

Step 104B. The MAC CE activates 8 groups of TCI states. When the first beam direction is in the 1 group of TCI states of the 8 groups of TCI states, and the 1 group of TCI states includes 2 TCI states, then it is in the first group of TCI states. The beam direction indicated by the TCI state receives the downlink data channel of the first transmission opportunity, and the beam direction indicated by the second TCI state receives the downlink data channel of the second transmission opportunity; wherein, the first beam direction Is the beam direction indicated by the first TCI, or the first beam direction is the beam direction indicated by the second TCI;

The terminal detects the eight TCI states activated by the MAC CE, the downlink control channel also indicates the symbol position of the first transmission opportunity, when the obtained first beam direction is in the eight TCI states activated by the MAC CE, and the TCI status indicates If the two states are set, and the first beam direction corresponds to the first state indicated by the TCI state, the terminal uses the indicated first beam direction, that is, the beam direction indicated by the first state to receive the first transmission opportunity Data, and use the beam direction indicated by the second state to receive the downlink data of the second transmission opportunity.

As shown in Table 1, when the first beam detected by the terminal is T0, and the eight TCI states activated by MAC CE include T0&T1, the terminal uses the beam direction indicated by T0 to detect the information of the first transmission opportunity , The beam direction indicated by T1 detects the information of the second transmission opportunity.

The terminal detects the eight TCI states activated by the MAC CE, the downlink control channel also indicates the symbol position of the first transmission opportunity, when the obtained first beam direction is in the eight TCI states activated by the MAC CE, and the TCI status indicates If the two states are established, and the first beam direction corresponds to the second state indicated by the TCI state, the terminal uses the beam direction indicated by the first state to receive the data of the first transmission opportunity, and uses the first beam The direction, that is, the beam direction indicated by the second state to receive the downlink data of the second transmission opportunity.

As shown in Table 1, when the first beam detected by the terminal is T1 and the eight TCI states activated by MAC CE include T0&T1, the terminal uses T0 to detect the information of the first transmission opportunity and T1 to detect The second transmission timing information.

Step 104C: The MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any one of the 8 groups of TCI states, the downlink of the first transmission opportunity is received in the first beam direction. Data channel.

The terminal detects the eight TCI states activated by MAC CE, and the downlink control channel also indicates the symbol position of the first transmission opportunity. When the obtained first beam direction is not in the eight TCI states activated by MAC CE, the terminal only The data of the first transmission opportunity is received by using the first beam direction.

As shown in Table 1, when the first beam detected by the terminal is T20, and the eight TCI states activated by MAC CE do not include T20, the terminal uses T20 to detect the information of the first transmission opportunity, and only Detect the information of the first transmission timing.

Step 104D: When the first beam direction is in the multiple sets of the eight sets of TCI states, select the one set of TCI states with the lowest TCI code. If the group of TCI states indicates one state, the solution in step 104A is executed, and if the group of TCI states indicates two states, then the solution in step 104B is executed.

When the first beam direction is in at least one TCI state among the eight TCI states, and one TCI state with the smallest TCI code among the at least one TCI state includes one TCI state, then in the first Receiving the downlink data channel of the first transmission opportunity in the beam direction;

When the first beam direction is in at least one TCI state among the eight TCI states, and the one TCI state with the smallest TCI code among the at least one TCI state includes two TCI states, then the first beam direction is in the first TCI state. A beam direction indicated by a TCI state receives the downlink data channel of the first transmission opportunity, and receives the downlink data channel of a second transmission opportunity in the beam direction indicated by the second TCI state; wherein, the first beam The direction is the beam direction indicated by the first TCI, or the first beam direction is the beam direction indicated by the second TCI.

For example, as shown in Table 2, when the first beam detected by the terminal is T0 and the eight TCI states activated by MAC CE include T0&T1 and T0, the terminal selects the lower TCI ID (TCI code is 001 The state of T0&T1 indicated by ), T0 is used to detect the information of the first transmission opportunity, and T1 is used to detect the information of the second transmission opportunity.

Table 2 TCI state configuration table

TCI code TCI status 000 T3 001 T0&T1 010 T6 011 T9 100 T11&T12 101 T15 110 T0

111 T23&T24

Step 105: The network device determines the beam direction used to transmit the downlink data channel at the first transmission opportunity or the second transmission opportunity according to the TCI state and the first beam direction activated by the MAC CE.

The method of this application is used for network equipment, and any one of the following steps 105A to D is executed.

Step 105A. The MAC CE activates 8 sets of TCI states. When the first beam direction is in the 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states includes 1 TCI state, then it is in the first beam Send the downlink data channel of the first transmission opportunity in the direction;

Step 105B: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; MAC CE activates 8 sets of TCI states, when the first beam direction is in 1 set of TCI states of the 8 sets of TCI states And the 1 group of TCI states includes 2 TCI states, then the downlink data channel of the first transmission opportunity is sent in the beam direction indicated by the first TCI state, and sent in the beam direction indicated by the second TCI state The downlink data channel at the second transmission opportunity; wherein the first beam direction is the beam direction indicated by the first TCI, or the first beam direction is the beam indicated by the second TCI direction;

Step 105C: The MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any one of the 8 groups of TCI states, send the downlink of the first transmission opportunity in the first beam direction Data channel.

Step 105D: When the first beam direction is in the multiple sets of the eight sets of TCI states, select the one set of TCI states with the lowest TCI code. If the group of TCI states with the lowest TCI code indicates one state, the solution in step 105A is executed, and if the group of TCI states indicates two states, the solution in step 105B is executed.

When the first beam direction is in at least one TCI state among the eight TCI states, and one TCI state with the smallest TCI code among the at least one TCI state includes one TCI state, then in the first Sending the downlink data channel of the first transmission opportunity in the beam direction;

When the first beam direction is in at least one TCI state among the eight TCI states, and the one TCI state with the smallest TCI code among the at least one TCI state includes two TCI states, then the first beam direction is in the first TCI state. A beam direction indicated by a TCI state transmits the downlink data channel of the first transmission opportunity, and the downlink data channel of a second transmission opportunity is transmitted in the beam direction indicated by the second TCI state; wherein, the first beam The direction is the beam direction indicated by the first TCI, or the first beam direction is the beam direction indicated by the second TCI.

In any method embodiment of the present application, preferably, step 106 is included.

Step 106: The uplink control information includes indication information, which is used to indicate the target beam direction and or the threshold value.

The uplink control information includes indication information, which is used to indicate the beam direction for sending or receiving the downlink data channel, that is, the target beam direction.

The target beam direction is the beam direction for receiving the downlink data channel determined by the terminal device in any one of steps 104A to C above.

The target beam direction in steps 104A and 104C is the first beam direction;

The target beam direction in step 104B is the beam direction indicated by the first TCI state and the beam direction indicated by the second TCI state, which includes the first beam direction and also includes the first group of TCI states Another beam direction indicated.

The target wave velocity direction in step 104D is determined for a group of TCI states with the smallest TCI code. When a group of TCI states with the smallest TCI code includes one TCI state, the target beam direction is the first beam direction. When a group of TCI states with the smallest TCI code contains two TCI states, the target beam direction is the beam direction indicated by the first TCI state and the beam direction indicated by the second TCI state, which includes the first TCI state. A beam direction also includes another beam direction indicated in a group of TCI states with the smallest TCI code.

Preferably, the uplink channel contains indication information for indicating the threshold value in step 101; the network device judges according to the threshold value, the downlink control information, and the time interval between the scheduled downlink data channel, and when it meets Under the condition of step 101, at least one solution of steps 105A to D is executed.

For example, the threshold value reflects the working ability of the terminal equipment, and the working ability reflected by the terminal reporting threshold. The base station reports according to the terminal ability and determines that the terminal is too late to decode the downlink control information, and uses the first beam corresponding to the control channel as For reference, the above rules are used to send data to the terminal, and at least one of steps 105A to D is executed.

When the terminal is too late to decode the downlink control information, the terminal performs data detection according to the beam determined by the above rule.

Figure 2 is a schematic diagram of an embodiment of a terminal device of this application. Terminal equipment in this application refers to mobile terminal equipment.

The terminal device is configured to: receive downlink control information, where the time interval between the downlink control information and the scheduled downlink data channel is less than a threshold; and select the lowest CORSET ID in the time unit closest to the downlink data channel As the first beam direction.

Preferably, the terminal device is further configured to identify indication information in the downlink control channel, and determine the symbol position of the first transmission opportunity.

Further, the MAC CE activates 8 groups of TCI states, when the first beam direction is in at least 1 group of TCI states of the 8 groups of TCI states, and a group of TCI states with the smallest TCI code among the at least 1 group of TCI states Contains 1 TCI state, then the downlink data channel of the first transmission opportunity is received in the first beam direction;

Alternatively, the MAC CE activates 8 groups of TCI states, when the first beam direction is in at least 1 group of TCI states of the 8 groups of TCI states, and among the at least 1 group of TCI states, in 1 group of TCI states with the smallest TCI code If two TCI states are included, the downlink data channel of the first transmission opportunity is received in the beam direction indicated by the first TCI state, and the downlink data channel of the second transmission opportunity is received in the beam direction indicated by the second TCI state. Data channel.

Alternatively, the MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any of the 8 groups of TCI states, the downlink data of the first transmission opportunity is received in the first beam direction channel.

Further, the mobile terminal is further configured to send uplink control information, and the uplink control information includes indication information used to indicate a beam direction for receiving the downlink data channel, that is, the target beam direction.

To implement the above technical solution, a terminal device 500 proposed in this application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503. The terminal receiving module is configured to receive the downlink data channel PDSCH and the downlink control channel PDCCH, identify indication information in the downlink control channel, and determine the symbol position of the first transmission opportunity and the symbol position of the second transmission opportunity. The terminal determining module is configured to determine whether the time interval between the first beam direction, the target beam direction, the downlink control information and the scheduled downlink data channel is less than a threshold. The terminal sending module is configured to send an uplink control channel PUCCH or an uplink data channel PUSCH, and the uplink control channel includes an indication of a target working beam and an indication of a threshold value.

Fig. 3 is a schematic diagram of an embodiment of a network device of this application.

The embodiment of the application also proposes a network device, the network device is configured to: send downlink control information, the time interval between the downlink control information and the scheduled downlink data channel is less than a threshold; The beam with the lowest CORSET ID in the most recent time unit of the data channel is used as the first beam direction.

Preferably, the network device is further configured to send downlink control information, and the downlink control channel includes indication information indicating the symbol position of the first transmission opportunity.

Further, the MAC CE activates 8 groups of TCI states, when the first beam direction is in at least 1 group of TCI states of the 8 groups of TCI states, and a group of TCI states with the smallest TCI code among the at least 1 group of TCI states Contains 1 TCI state, then the downlink data channel of the first transmission opportunity is received in the first beam direction;

Alternatively, the MAC CE activates 8 groups of TCI states, when the first beam direction is in at least 1 group of TCI states of the 8 groups of TCI states, and among the at least 1 group of TCI states, in 1 group of TCI states with the smallest TCI code If two TCI states are included, the downlink data channel of the first transmission opportunity is received in the beam direction indicated by the first TCI state, and the downlink data channel of the second transmission opportunity is received in the beam direction indicated by the second TCI state. Data channel

Alternatively, the MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any of the 8 groups of TCI states, the downlink data of the first transmission opportunity is received in the first beam direction channel.

Further, the network device is further configured to receive uplink control information, where the uplink control information includes indication information used to indicate a beam direction for sending the downlink data channel.

In order to implement the above technical solution, a network device 400 proposed in this application includes a network sending module 401, a network determining module 402, and a network receiving module 403. The network receiving module is configured to receive the uplink data channel PUSCH and the uplink control channel PUCCH, and identify indication information in the uplink control channel. The terminal determining module is used to determine whether the time interval between the target beam direction, the downlink control information, and the scheduled downlink data channel is less than a threshold. The terminal sending module is used to send the downlink control channel PDCCH. The terminal sending module is also used to send downlink data PDSCH.

Fig. 4 shows a schematic structural diagram of a network device according to another embodiment of the present invention. As shown in FIG. 4, the network device 600 includes a processor 601, a transceiver 602, a memory 603, and a bus interface. among them:

In the embodiment of the present invention, the network device 600 further includes: a computer program that is stored in the memory 603 and can run on the processor 601, and the computer program is executed by the processor 601 to implement the above-mentioned FIG. 1 Each process in the method can achieve the same technical effect. In order to avoid repetition, it will not be repeated here.

Fig. 4 shows a schematic structural diagram of a network device according to another embodiment of the present invention. As shown in FIG. 4, the network device 600 includes a processor 601, a wireless interface 602, and a memory 603. Wherein, the wireless interface may be multiple components, including a transmitter and a receiver, and provide a unit for communicating with various other devices on a transmission medium. The wireless interface realizes the communication function with the terminal device, and processes the wireless signal through the receiving and transmitting device, and the data carried by the signal communicates with the memory or the processor via an internal bus structure. The memory 603 contains a computer program for executing any one of the embodiments of the present application, and the computer program runs or changes on the processor 601. When the memory, processor, and wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which will not be repeated here.

Fig. 5 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 700 shown in FIG. 5 includes at least one processor 701, a memory 702, a user interface 703, and at least one network interface 704. The various components in the terminal device 700 are coupled together through a bus system. The bus system is used to realize the connection and communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

The user interface 703 may include a display, a keyboard, or a pointing device, for example, a mouse, a trackball, a touch panel, or a touch screen.

The memory 702 stores executable modules or data structures. The operating system and application programs can be stored in the memory. Among them, the operating system contains various system programs, such as a framework layer, a core library layer, and a driver layer, which are used to implement various basic services and process hardware-based tasks. Application programs include various application programs, such as media players, browsers, etc., for implementing various application services.

In the embodiment of the present invention, the memory 702 contains a computer program for executing any one of the embodiments of the present application, and the computer program runs or changes on the processor 701.

The memory 702 contains a computer-readable storage medium, and the processor 701 reads information in the memory 702, and completes the steps of the foregoing method in combination with its hardware. Specifically, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 701, each step of the method embodiment described in any one of the embodiments of FIGS. 1 to 3 is implemented.

The processor 701 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the method of the present application can be completed by an integrated logic circuit of hardware in the processor 701 or instructions in the form of software. The processor 701 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present invention may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.

Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. In a typical configuration, the device of the present application includes one or more processors (CPU), input/output user interface, network interface, and memory.

In addition, the present invention may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

Therefore, this application also proposes a computer-readable medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the present application are implemented. For example, the memory 603, 702 of the present invention may include non-permanent memory, random access memory (RAM) and/or non-volatile memory in a computer-readable medium, such as read-only memory (ROM) or flash memory ( flash RAM).

Computer-readable media include permanent and non-permanent, removable and non-removable media, and information storage can be realized by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical storage, Magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media can be used to store information that can be accessed by computing devices. According to the definition in this article, computer-readable media does not include transitory media, such as modulated data signals and carrier waves.

This application also proposes a mobile communication system, including at least one terminal device as described in any embodiment of this application and at least one network device as described in any embodiment of this application.

It should also be noted that the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or equipment including a series of elements not only includes those elements, but also includes Other elements that are not explicitly listed, or they also include elements inherent to such processes, methods, commodities, or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, commodity, or equipment that includes the element.

The foregoing descriptions are only examples of the present application, and are not used to limit the present application. For those skilled in the art, this application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of the claims of this application.

Claims (23)

A method for multipoint transmission beam indication, which is characterized in that it comprises the following steps: The time interval between the downlink control information and the scheduled downlink data channel is less than the threshold; The beam with the lowest CORSET ID in the time unit closest to the downlink data channel is selected as the first beam direction. The method of claim 1, further comprising the following steps: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; The MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states with the smallest TCI code among the at least 1 set of TCI states includes 1 In a TCI state, the downlink data channel of the first transmission opportunity is received in the first beam direction. The method of claim 1, further comprising the following steps: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; The MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states with the smallest TCI code among the at least 1 set of TCI states includes 2 TCI state, the downlink data channel of the first transmission opportunity is received in the beam direction indicated by the first TCI state, and the downlink data channel of the second transmission opportunity is received in the beam direction indicated by the second TCI state . The method of claim 1, further comprising the following steps: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; The MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any one of the 8 groups of TCI states, the downlink data channel of the first transmission opportunity is received in the first beam direction. The method of claim 1, further comprising the following steps: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; The MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states with the smallest TCI code among the at least 1 set of TCI states includes 1 In a TCI state, the downlink data channel of the first transmission opportunity is sent in the first beam direction. The method of claim 1, further comprising the following steps: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; The MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states with the smallest TCI code among the at least 1 set of TCI states includes 2 If a TCI state, the downlink data channel of the first transmission opportunity is transmitted in the beam direction indicated by the first TCI state, and the downlink data channel of the second transmission opportunity is transmitted in the beam direction indicated by the second TCI state . The method of claim 1, further comprising the following steps: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; The MAC CE activates 8 sets of TCI states, and when the first beam direction is not in any one of the 8 sets of TCI states, the downlink data channel of the first transmission opportunity is sent in the first beam direction. The method of claim 3 or 6, wherein: The first beam direction is the beam direction indicated by the first TCI, or, The first beam direction is the beam direction indicated by the second TCI. 7. The method according to any one of claims 1-7, further comprising the following steps: The uplink control information includes indication information, which is used to indicate the beam direction for sending or receiving the downlink data channel. A terminal device, characterized in that: Receiving downlink control information, where the time interval between the downlink control information and the scheduled downlink data channel is less than a threshold; The beam with the lowest CORSET ID in the time unit closest to the downlink data channel is selected as the first beam direction. The terminal device according to claim 10, wherein: Identifying indication information in the downlink control channel, and determining the symbol position of the first transmission opportunity; The MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states with the smallest TCI code among the at least 1 set of TCI states includes 1 In a TCI state, the downlink data channel of the first transmission opportunity is received in the first beam direction. The terminal device according to claim 10, wherein: Identifying indication information in the downlink control channel, and determining the symbol position of the first transmission opportunity; The MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states with the smallest TCI code among the at least 1 set of TCI states includes 2 TCI state, the downlink data channel of the first transmission opportunity is received in the beam direction indicated by the first TCI state, and the downlink data channel of the second transmission opportunity is received in the beam direction indicated by the second TCI state . The terminal device according to claim 10, wherein: Identifying indication information in the downlink control channel, and determining the symbol position of the first transmission opportunity; The MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any one of the 8 groups of TCI states, the downlink data channel of the first transmission opportunity is received in the first beam direction. The terminal device according to claim 10, wherein: Sending uplink control information, where the uplink control information includes indication information used to indicate a beam direction for receiving the downlink data channel. A terminal device, characterized by comprising: a memory, a processor, and a computer program stored on the memory and capable of running on the processor, and when the computer program is executed by the processor, the implementation is as claimed in the claims Steps of the method described in any one of 1 to 4 and 8 to 9. A network device, characterized in that: Sending downlink control information, where the time interval between the downlink control information and the scheduled downlink data channel is less than a threshold; The beam with the lowest CORSET ID in the time unit closest to the downlink data channel is selected as the first beam direction. The network device of claim 16, wherein: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; The MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states with the smallest TCI code among the at least 1 set of TCI states includes 1 In a TCI state, the downlink data channel of the first transmission opportunity is received in the first beam direction. The network device of claim 16, wherein: The downlink control channel includes indication information, indicating the symbol position of the first transmission opportunity; The MAC CE activates 8 sets of TCI states, when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states, and the 1 set of TCI states with the smallest TCI code among the at least 1 set of TCI states includes 2 TCI state, the downlink data channel of the first transmission opportunity is received in the beam direction indicated by the first TCI state, and the downlink data channel of the second transmission opportunity is received in the beam direction indicated by the second TCI state . The network device of claim 16, wherein: The downlink control channel includes indication information indicating the symbol position of the first transmission opportunity; The MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any one of the 8 groups of TCI states, the downlink data channel of the first transmission opportunity is received in the first beam direction. The network device of claim 16, wherein: Receiving uplink control information, where the uplink control information includes indication information used to indicate a beam direction for transmitting the downlink data channel. A network device, characterized by comprising: a memory, a processor, and a computer program stored on the memory and capable of running on the processor, the computer program being executed by the processor realizes the following Steps of the method described in any one of 1, 5-9. A mobile communication system characterized by comprising at least one terminal device according to any one of claims 10-15 and at least one network device according to any one of claims 16-21. A computer-readable medium storing a computer program on the computer-readable medium, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1-9 are realized.

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