CN110856258B

CN110856258B - Multipoint transmission beam indication method and equipment

Info

Publication number: CN110856258B
Application number: CN201911090542.1A
Authority: CN
Inventors: 焦慧颖
Original assignee: China Academy of Information and Communications Technology CAICT
Current assignee: China Academy of Information and Communications Technology CAICT
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2022-02-22
Anticipated expiration: 2039-11-08
Also published as: WO2021088266A1; CN110856258A

Abstract

The application discloses a method and equipment for indicating multipoint transmission beams, wherein the method comprises the following steps: the time interval between the downlink control information and the scheduled downlink data channel is less than a threshold value; and selecting the beam with the lowest CORSET ID in the time unit closest to the downlink data channel as a first beam direction. The terminal equipment determines the beam direction for receiving the downlink data channel at the 1 st transmission opportunity or the 2 nd transmission opportunity according to the TCI state activated by the MAC control unit and the first beam direction; and the network equipment determines the beam direction for sending the downlink data channel at the 1 st transmission opportunity or the 2 nd transmission opportunity according to the TCI state activated by the MAC control unit and the first beam direction. The application also provides the terminal equipment, the network equipment and the system applying the method. The scheme of the application solves the problem of how to select the beam when the offset between the downlink control channel and the scheduled PDSCH is smaller than the threshold under the condition of transmitting the beam by multiple points.

Description

Multipoint transmission beam indication method and equipment

Technical Field

The present invention relates to the field of mobile communications technologies, and in particular, to a method for indicating a multipoint transmission beam and a device using the same.

Background

For a system adopting high-frequency band transmission, the uplink and downlink control channels can adopt analog beamforming transmission to realize higher beamforming gain and larger coverage. Radio resources for downlink control channels are semi-statically divided into multiple control resource sets (CORSET), each CORSET containing radio resources for multiple PDCCHs. The base station can semi-statically configure a sending beam direction for each CORSET, different CORSET configures beams in different directions, and the base station can dynamically switch in different CORSET, so that the dynamic switching of the beams is realized. When sending the PDCCH, the base station may select a set with a suitable beam direction according to the information of the terminal device. At the receiving end, the terminal equipment performs blind detection in the configured CORSET. For a candidate CORSET, the terminal device will receive using a receive beam corresponding to the CORSET transmit beam.

In system design, the configurable range of the time gap between the PDCCH and the scheduled PDSCH is made larger, and an important problem related to dynamic analog beams is that a certain time gap is required between the PDCCH and the PDSCH. Since the PDCCH includes indication information of the PDSCH transmission beam, the gap is used to decode the PDCCH and switch from analog beamforming of the PDCCH to analog beamforming of the PDSCH. The decoding of the PDCCH requires a certain time, and in the process of demodulating and decoding the PDCCH, if the PDSCH and PDCCH gap is small, the terminal device cannot obtain the transmission beam indication information for receiving the PDSCH. In order to receive the information of the PDSCH, a threshold value for distinguishing whether PDCCH demodulation decoding is completed or not completed is defined in the standard. If the time slot length between the PDCCH and the PDSH is smaller than the threshold, the terminal device starts receiving the PDSCH before the PDCCH demodulation and decoding are completed, and the beam indication cannot be obtained from the PDCCH, and at this time, the PDSCH can be received by using a default beam. This default receive beam is independent of the beam indication transmitted by the PDCCH, but uses the same receive beam as the PDCCH, i.e. the PDCCH and the PDSCH use the same receive beam during this time period. When the gap between the PDCCH and the PDSCH is greater than the threshold value, the beam indicated by the PDCCH may be used for receiving the PDSCH.

In NR Rel-15, when TCI-PresentInDCI is configured to enabled, the Transmission configuration indication (Transmission configuration indication) in downlink control information DCI 1_1 has a field length of 3 bits, which indicates the index of the TCI state of PDSCH, corresponds to up to 8 TCI states in MAC CE (MAC layer control element), and when TCI-PresentInDCI is not configured, the field length is 0. When tci-PresentInDCI is not configured or a PDSCH scheduled using DCI 1_0, a reception beam is the same as a PDCCH beam of the lowest common ID on the latest slot.

There are problems:

since the main requirement of URLLC traffic is low latency when there are multiple TRP URLLC, how to handle when the offset between the downlink control channel and its scheduled PDSCH is less than the threshold is a very important aspect, so the assumption of the receive beam used for data in this case for URLLC traffic is more important.

For URLLC scheme 3, the base station indicates the position of the 1 st transmission opportunity by using the downlink control channel, and the 2 nd transmission opportunity is K symbol offset of the 1 st transmission opportunity and has the same length as the 1 st transmission opportunity. And, the number of the specific transmission occasions in the scheme 3 depends on the indicated number of the TCI status in the downlink control channel, if the indicated number of the TCI status is 1, the number of the transmission occasions is 1, and if the indicated number of the TCI status is 2, the number of the transmission occasions is 2.

Because the scheduling granularity of the URLLC service is very small, even reaching the symbol level, very low time delay is obtained, and simultaneously, a TDM repeating mechanism in a time slot is supported for obtaining reliability. I.e., repetition of a plurality of sub-slots (mini slots) of the PDSCH in one slot, further enhances reliability by repeating the PDSCH using different TCI states to obtain beam diversity gain against channel blocking characteristics. How the default QCL beam mechanism in scheme 3 is defined is very important when the offsets of the downlink control channel and PDSCH are less than the threshold.

Disclosure of Invention

The embodiment of the application provides a method and equipment for indicating a multipoint transmission beam, which solve the problem of how to select the beam when the offset between a downlink control channel and a scheduled PDSCH is smaller than a threshold under the condition of multipoint transmission beam.

In a first aspect, an embodiment of the present application provides a method for indicating a multipoint transmission beam, including the following steps:

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

and selecting the beam with the lowest CORSET ID in the time unit closest to the downlink data channel as a first beam direction.

Further, the downlink control channel includes indication information indicating a symbol position of the 1 st transmission opportunity.

Further, the method of the present application is applied to a terminal device, where an MAC CE activates 8 groups of TCI states, and when the first beam direction includes 1 TCI state in at least 1 group of TCI states of the 8 groups of TCI states and 1 group of TCI states in which a TCI code is minimum in the at least 1 group of TCI states, the downlink data channel at the 1 st transmission opportunity is received in the first beam direction;

or, the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 2 TCI states in at least 1 group of TCI states of the 8 groups of TCI states and 1 group of TCI states in which a TCI code is minimum in the at least 1 group of TCI states, receives the downlink data channel at the 1 st transmission opportunity in the beam direction indicated by the 1 st TCI state, and receives the downlink data channel at the 2 nd transmission opportunity in the beam direction indicated by the 2 nd TCI state; wherein the first beam direction is a beam direction indicated by the 1 st TCI, or the first beam direction is a beam direction indicated by the 2 nd TCI;

or, the MAC CE activates 8 sets of TCI states, and receives the downlink data channel of the 1 st transmission opportunity in the first beam direction when the first beam direction is not in any 1 set of TCI states of the 8 sets of TCI states.

Further, the method of the present application is applied to a network device, where the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 1 TCI state in at least 1 group of TCI states of the 8 groups of TCI states and 1 group of TCI states in which a TCI code is minimum in the at least 1 group of TCI states, the downlink data channel at the 1 st transmission opportunity is transmitted in the first beam direction;

or, the downlink control channel includes indication information indicating a symbol position of the 1 st transmission opportunity; the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 2 TCI states in at least 1 group of TCI states among the 8 groups of TCI states and 1 group of TCI states in which a TCI code is minimum among the at least 1 group of TCI states, the downlink data channel at the 1 st transmission opportunity is transmitted in the beam direction indicated by the 1 st TCI state, and the downlink data channel at the 2 nd transmission opportunity is transmitted in the beam direction indicated by the 2 nd TCI state; wherein the first beam direction is a beam direction indicated by the 1 st TCI, or the first beam direction is a beam direction indicated by the 2 nd TCI;

or, the MAC CE activates 8 sets of TCI states, and transmits the downlink data channel of the 1 st transmission opportunity in the first beam direction when the first beam direction is not in any 1 set of TCI states of the 8 sets of TCI states.

In any one of the method embodiments of the present application, preferably, the uplink control information includes indication information for indicating a beam direction for transmitting or receiving the downlink data channel.

In a second aspect, the present application further provides a terminal device, which uses the method of any one of the embodiments of the present application, the terminal device is configured to,

receiving downlink control information, wherein the time interval between the downlink control information and a scheduled downlink data channel is less than a threshold value;

Preferably, the terminal device is further configured to identify indication information in the downlink control channel, and determine a symbol position of a 1 st transmission opportunity.

Further, the MAC CE activates 8 sets of TCI states, and when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states and 1 set of TCI states in which a TCI code is the minimum among the at least 1 set of TCI states includes 1 TCI state, receives the downlink data channel at the 1 st transmission opportunity in the first beam direction;

or, the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 2 TCI states in at least 1 group of TCI states of the 8 groups of TCI states and 1 group of TCI states in which a TCI code is minimum in the at least 1 group of TCI states, receives the downlink data channel at the 1 st transmission opportunity in the beam direction indicated by the 1 st TCI state, and receives the downlink data channel at the 2 nd transmission opportunity in the beam direction indicated by the 2 nd TCI state.

Further, the mobile terminal is further configured to send uplink control information, where the uplink control information includes indication information for indicating a beam direction for receiving the downlink data channel.

An embodiment of the present application further provides a terminal device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of the embodiments of the present application.

In a third aspect, an embodiment of the present application further provides a network device, which uses the method according to any of the embodiments of the present application, and the network device is configured to,

sending downlink control information, wherein the time interval between the downlink control information and the scheduled downlink data channel is less than a threshold value;

the beam with the lowest CORSET ID in the time unit (e.g., 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, where the downlink control channel includes indication information indicating a symbol position of the 1 st transmission opportunity.

Further, the MAC CE activates 8 sets of TCI states, and when the first beam direction is in at least 1 set of TCI states of the 8 sets of TCI states and 1 set of TCI states in which a TCI code is the minimum among the at least 1 set of TCI states includes 1 TCI state, transmits the downlink data channel at the 1 st transmission opportunity in the first beam direction;

or, the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 2 TCI states in at least 1 group of TCI states of the 8 groups of TCI states and 1 group of TCI states in which a TCI code is minimum in the at least 1 group of TCI states, transmits the downlink data channel at the 1 st transmission opportunity in the beam direction indicated by the 1 st TCI state, and transmits the downlink data channel at the 2 nd transmission opportunity in the beam direction indicated by the 2 nd TCI state;

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

An embodiment of the present application further provides a network device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of the embodiments of the present application.

In a fourth aspect, the present application provides a mobile communication system, which includes at least 1 terminal device according to any embodiment of the present application and at least 1 network device according to any embodiment of the present application.

In a fifth aspect, the present application also proposes a computer-readable medium on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the method according to any one of the embodiments of the present application.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

the method and the device solve the problem of how to select the beam when the offset between the downlink control channel and the PDSCH scheduled by the downlink control channel is smaller than the threshold under the condition of transmitting the beam by multiple points. Data repetition and beam diversity gain can be ensured, thereby obtaining high reliability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a flow chart of an embodiment of the method of the present application;

FIG. 2 is a schematic diagram of an embodiment of a terminal device according to the present application;

FIG. 3 is a schematic diagram of an embodiment of a network device of the present application;

fig. 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 of another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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

Fig. 1 is a flow chart of an embodiment of the method of the present application.

The embodiment of the application provides a multipoint transmission beam indicating method, which comprises the following steps:

step 101, the time interval between the downlink control information and the scheduled downlink data channel is smaller than a threshold value.

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

And 102, selecting the beam with the lowest CORSET ID in the time unit closest to the downlink data channel as a first beam direction.

For example, when the terminal receives the downlink PDSCH, the default reference beam is the same beam as the lowest sets ID of the latest time unit. And detecting a downlink control channel to obtain a first beam direction, wherein the first beam direction is the beam direction of the lowest CORSET ID of the resource nearest time unit away from the downlink data channel.

Step 103, the downlink control channel includes indication information indicating the symbol position of the 1 st transmission opportunity.

And determining the symbol position of the 2 nd transmission opportunity according to the symbol position of the 1 st transmission opportunity and a preset offset value.

And step 104, the terminal device determines a beam direction for receiving the downlink data channel at the 1 st transmission opportunity or the 2 nd transmission opportunity according to the TCI state activated by the MAC CE and the first beam direction.

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

Step 104A, the MAC CE activates 8 sets of TCI states, and when the first beam direction is in 1 set of TCI states of the 8 sets of TCI states and the 1 set of TCI states includes 1 TCI state, receives the downlink data channel at the 1 st transmission opportunity in the first beam direction;

the terminal detects 8 TCI states activated by the MAC CE, the downlink control channel further indicates a symbol position of a 1 st transmission opportunity, and when the obtained first beam direction is in the 8 TCI states activated by the MAC CE and the TCI state indicates one TC state, the terminal receives only data of the 1 st transmission opportunity.

For example, as shown in table 1, when the first beam detected by the terminal is T3 and the MAC CE is activated in 8 TCI states including T3, the terminal detects the information of the 1 st transmission opportunity with the beam direction indicated by T3 and detects only the information of the 1 st transmission opportunity.

TABLE 1 TCI State configuration Table

TCI coding	TCI State
		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 sets of TCI states, and when the first beam direction is in 1 set of TCI states of the 8 sets of TCI states and the 1 set of TCI states includes 2 TCI states, receives the downlink data channel at the 1 st transmission opportunity in the beam direction indicated by the 1 st TCI state, and receives the downlink data channel at the 2 nd transmission opportunity in the beam direction indicated by the 2 nd TCI state; wherein the first beam direction is a beam direction indicated by the 1 st TCI, or the first beam direction is a beam direction indicated by the 2 nd TCI;

the terminal detects 8 TCI states activated by the MAC CE, the downlink control channel further indicates a symbol position of a 1 st transmission opportunity, and when the obtained first beam direction is in the 8 TCI states activated by the MAC CE, and the TCI states indicate 2 states, and the first beam direction corresponds to the first state indicated by the TCI state, the terminal receives data of the 1 st transmission opportunity in the indicated first beam direction, that is, the beam direction indicated by the first state, and receives downlink data of the 2 nd transmission opportunity in the beam direction indicated by the second state.

As shown in table 1, when the first beam detected by the terminal is T0 and the 8 TCI states activated by the MAC CE include T0& T1, the terminal detects information of the 1 st transmission opportunity by using the beam direction indicated by T0 and detects information of the 2 nd transmission opportunity by using the beam direction indicated by T1.

The terminal detects 8 TCI states activated by the MAC CE, the downlink control channel further indicates a symbol position of a 1 st transmission opportunity, and when the obtained first beam direction is in the 8 TCI states activated by the MAC CE, and the TCI states indicate 2 states, and the first beam direction corresponds to the second state indicated by the TCI states, the terminal receives data of the 1 st transmission opportunity in the beam direction indicated by the indicated first state, and receives downlink data of the 2 nd transmission opportunity in the first beam direction, that is, the beam direction indicated by the second state.

As shown in table 1, when the first beam detected by the terminal is T1 and the MAC CE is activated in 8 TCI states including T0& T1, the terminal detects information of the 1 st transmission opportunity by T0 and detects information of the 2 nd transmission opportunity by T1.

Step 104C, the MAC CE activates 8 sets of TCI states, and receives the downlink data channel at the 1 st transmission opportunity in the first beam direction when the first beam direction is not in any 1 set of TCI states of the 8 sets of TCI states.

The terminal detects 8 TCI states activated by the MAC CE, the downlink control channel also indicates the symbol position of the 1 st transmission opportunity, and when the obtained first beam direction is not in the 8 TCI states activated by the MAC CE, the terminal receives the data of the 1 st transmission opportunity only in the first beam direction.

As shown in table 1, when the first beam detected by the terminal is T20 and T20 is not included in the 8 TCI states in which the MAC CE is activated, the terminal detects information of the 1 st transmission opportunity using T20 and detects only information of the 1 st transmission opportunity.

And step 104D, when the first beam direction is in the multiple groups of states of the 8 groups of TCI states, selecting 1 group of TCI states with the lowest TCI codes. If the set of TCI states indicates 1 state, then execution follows the scheme of step 104A, and if the set of TCI states indicates two states, then execution follows the scheme of step 104B.

When the first beam direction includes 1 TCI state in at least 1 TCI state of the 8 TCI states and 1 TCI state of the at least 1 TCI state in which the TCI code is minimum, receiving the downlink data channel at a 1 st transmission opportunity in the first beam direction;

when the first beam direction includes 2 TCI states in at least 1 TCI state of the 8 TCI states and 1 TCI state with the smallest TCI code among the at least 1 TCI states, receiving the downlink data channel at the 1 st transmission opportunity in the beam direction indicated by the 1 st TCI state and receiving the downlink data channel at the 2 nd transmission opportunity in the beam direction indicated by the 2 nd TCI state; wherein the first beam direction is a beam direction indicated by the 1 st TCI, or the first beam direction is a beam direction indicated by the 2 nd TCI.

For example, as shown in table 2, when the first beam detected by the terminal is T0 and when T0& T1 and T0 are included in 8 TCI states in which the MAC CE is activated, the terminal selects a state of T0& T1 indicated by a lower TCI ID (TCI coded as 001), detects information of the 1 st transmission opportunity by T0, and detects information of the 2 nd transmission opportunity by T1.

TABLE 2 TCI State configuration Table

Step 105, the network device determines a beam direction for transmitting the 1 st transmission opportunity or the 2 nd transmission opportunity downlink data channel according to the TCI state activated by the MAC CE and the first beam direction.

The method of the present application is for a network device to perform any of the following steps 105A-D.

Step 105A, the MAC CE activates 8 sets of TCI states, and when the first beam direction is in 1 set of TCI states of the 8 sets of TCI states and the 1 set of TCI states includes 1 TCI state, transmits the downlink data channel at the 1 st transmission opportunity in the first beam direction;

step 105B, the downlink control channel includes indication information indicating a symbol position of the 1 st transmission opportunity; the MAC CE activates 8 groups of TCI states, and when the first beam direction is in 1 group of TCI states of the 8 groups of TCI states and the 1 group of TCI states includes 2 TCI states, transmits the downlink data channel at the 1 st transmission opportunity in the beam direction indicated by the 1 st TCI state, and transmits the downlink data channel at the 2 nd transmission opportunity in the beam direction indicated by the 2 nd TCI state; wherein the first beam direction is a beam direction indicated by the 1 st TCI, or the first beam direction is a beam direction indicated by the 2 nd TCI;

step 105C, the MAC CE activates 8 sets of TCI states, and transmits the downlink data channel at the 1 st transmission opportunity in the first beam direction when the first beam direction is not in any 1 set of TCI states of the 8 sets of TCI states.

And 105D, when the first beam direction is in a plurality of states of the 8 groups of TCI states, selecting 1 group of TCI states with the lowest TCI codes. If the 1 set of TCI states with the lowest TCI encoding indicates 1 state, then execution is according to the scheme of step 105A, and if the set of TCI states indicates two states, then execution is according to the scheme of step 105B.

When the first beam direction includes 1 TCI state in at least 1 TCI state of the 8 TCI states and 1 TCI state of the at least 1 TCI state in which the TCI code is minimum, transmitting the downlink data channel at the 1 st transmission opportunity in the first beam direction;

when the first beam direction includes 2 TCI states in at least 1 TCI state of the 8 TCI states and 1 TCI state with the smallest TCI code among the at least 1 TCI states, transmitting the downlink data channel at the 1 st transmission opportunity in the beam direction indicated by the 1 st TCI state, and transmitting the downlink data channel at the 2 nd transmission opportunity in the beam direction indicated by the 2 nd TCI state; wherein the first beam direction is a beam direction indicated by the 1 st TCI, or the first beam direction is a beam direction indicated by the 2 nd TCI.

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

And step 106, the uplink control information comprises indication information used for indicating the target beam direction and/or the threshold value.

The uplink control information includes indication information for indicating a beam direction, i.e., a target beam direction, for transmitting or receiving the downlink data channel.

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

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

the target beam direction in step 104B is the beam direction indicated by the 1 st TCI status and the beam direction indicated by the 2 nd TCI status, which includes the first beam direction and also includes another beam direction indicated in the 1 set of TCI statuses.

The target wave velocity direction in step 104D is determined for 1 group of TCI states with the minimum TCI code, and when 1 group of TCI states with the minimum TCI code includes 1 TCI state, the target beam direction is the first beam direction. When 2 TCI states are included in the 1 group of TCI states with the smallest TCI code, the target beam direction is the beam direction indicated by the 1 st TCI state and the beam direction indicated by the 2 nd TCI state, which includes the first beam direction and also includes another beam direction indicated in the 1 group of TCI states with the smallest TCI code.

Preferably, the uplink channel includes 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 channels, and executes at least one of the schemes in the steps 105A to D when the condition in the step 101 is satisfied.

For example, the threshold value reflects the working capability of the terminal device, the terminal reports the working capability reflected by the threshold, the base station determines that the terminal is not ready to decode the downlink control information according to the terminal capability report, and uses the first beam corresponding to the control channel as a reference, and adopts the above rule to send data to the terminal, and executes at least one of the schemes in steps 105A to D.

When the terminal is not ready to decode the downlink control information, the terminal performs data detection according to the beam determined by the rule.

Fig. 2 is a schematic diagram of an embodiment of a terminal device according to the present application. The terminal device in the present application refers to a mobile terminal device.

The terminal device is configured to: receiving downlink control information, wherein the time interval between the downlink control information and a scheduled downlink data channel is less than a threshold value; and selecting the beam with the lowest CORSET ID in the time unit closest to the downlink data channel as a first beam direction.

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

In order to implement the foregoing technical solution, the terminal device 500 provided in the present application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503. And the terminal receiving module is used for receiving a downlink data channel PDSCH and a downlink control channel PDCCH, identifying indication information in the downlink control channel, and determining the symbol position of the 1 st transmission opportunity and the symbol position of the 2 nd transmission opportunity. The terminal determining module is configured to determine whether a time interval between the first beam direction, the target beam direction, the downlink control information, and the scheduled downlink data channel is smaller than a threshold value. And the terminal sending module is used for sending an uplink control channel PUCCH or an uplink data channel PUSCH, wherein the uplink control channel comprises an indication of a target working beam and/or an indication of a threshold value.

Fig. 3 is a schematic diagram of an embodiment of a network device according to the present application.

An embodiment of the present application further provides a network device, where the network device is configured to: sending downlink control information, wherein the time interval between the downlink control information and the scheduled downlink data channel is less than a threshold value; and selecting the beam with the lowest CORSET ID in the time unit closest to the downlink data channel as a first beam direction.

In order to implement the foregoing technical solution, the network device 400 provided in the present application includes a network sending module 401, a network determining module 402, and a network receiving module 403. The network receiving module is used for receiving an uplink data channel PUSCH and an uplink control channel PUCCH and identifying indication information in the uplink control channel. The network determining module is configured to determine whether a time interval between the target beam direction, the downlink control information, and the scheduled downlink data channel is smaller than a threshold value. And the network sending module is used for sending a downlink control channel PDCCH. The network sending module is further configured to send a downlink data PDSCH.

Fig. 4 is 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. Wherein:

in this embodiment of the present invention, the network device 600 further includes: a computer program stored in the memory 603 and capable of running on the processor 601, where the computer program, when executed by the processor 601, implements each process in the method shown in fig. 1, and can achieve the same technical effect, and is not described herein again to avoid repetition.

In fig. 4, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 601 and various circuits of memory represented by memory 603 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 602 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 601 is responsible for managing the bus architecture and general processing, and the memory 603 may store data used by the processor 601 in performing operations.

Fig. 5 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 700 shown in fig. 5 includes: at least one processor 701, memory 702, user interface 703, and at least one network interface 704. The various components in the terminal device 700 are coupled together by a bus system 705. It is understood that the bus system 705 is used to enable communications among the components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration the various busses are labeled in figure 5 as the bus system 705.

The user interface 703 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.

It is to be understood that the memory 702 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 702 of the systems and methods described in this embodiment of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 702 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 7021 and application programs 7022.

The operating system 7021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application 7022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. Programs that implement methods in accordance with embodiments of the present invention can be included within application program 7022.

In this embodiment of the present invention, the terminal device 700 further includes: a computer program stored in the memory 702 and capable of running on the processor 701, wherein the computer program, when executed by the processor 701, implements the processes of the method described in fig. 1 above, and can achieve the same technical effects, and therefore, in order to avoid repetition, details are not repeated herein.

The method disclosed by the embodiment of the invention can be applied to the processor 701 or implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by hardware integrated logic circuits in the processor 701 or instructions in the form of software. The Processor 701 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702, and performs the steps of the above method in combination with the hardware thereof. In particular, the computer-readable storage medium has stored thereon a computer program which, when executed by the processor 701, performs the steps of the method embodiment as described above with respect to fig. 1.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, 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, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

The present application therefore also proposes a computer-readable medium on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the present application.

The present application further provides a mobile communication system, which includes at least 1 terminal device according to any embodiment of the present application and at least 1 network device according to any embodiment of the present application.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for indicating a multi-spot transmission beam, comprising the steps of:

the time interval between the downlink control channel and the scheduled downlink data channel is less than a threshold value;

selecting the wave beam with the lowest CORSET ID in the time unit closest to the downlink data channel as a first wave beam direction;

the downlink control channel comprises indication information which indicates the symbol position of the 1 st transmission opportunity;

the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 1 TCI state in at least 1 group of TCI states among the 8 groups of TCI states and 1 group of TCI state in which a TCI code is the smallest among the at least 1 group of TCI states, transmits/receives the downlink data channel at the 1 st transmission opportunity in the first beam direction;

the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 2 TCI states in at least 1 group of TCI states among the 8 groups of TCI states and 1 group of TCI states in which a TCI code is minimum among the at least 1 group of TCI states, the downlink data channel at the 1 st transmission opportunity is transmitted/received in the beam direction indicated by the 1 st TCI state, and the downlink data channel at the 2 nd transmission opportunity is transmitted/received in the beam direction indicated by the 2 nd TCI state;

the MAC CE activates 8 sets of TCI states, and transmits/receives the downlink data channel of the 1 st transmission opportunity in the first beam direction when the first beam direction is not in any 1 set of TCI states of the 8 sets of TCI states.

2. The method of claim 1,

the first beam direction is a beam direction indicated by the 1 st TCI, or,

the first beam direction is the beam direction indicated by the 2 nd TCI.

3. The method of claim 1, further comprising the step of:

the uplink control information includes indication information for indicating a beam direction for transmitting or receiving the downlink data channel.

4. A terminal device for implementing the method of any one of claims 1 to 3, comprising

A terminal receiving module, configured to receive a downlink control channel, and determine a symbol position of a 1 st transmission opportunity and a symbol position of a 2 nd transmission opportunity;

a terminal determining module, configured to determine whether a time interval between a first beam direction, the downlink control channel, and the scheduled downlink data channel is smaller than a threshold value;

and the terminal sending module is used for sending the uplink control channel.

5. The terminal device of claim 4,

identifying indication information in the downlink control channel and determining the symbol position of the 1 st transmission opportunity;

and the MAC CE activates 8 groups of TCI states, and receives the downlink data channel at the 1 st transmission opportunity in the first beam direction when the first beam direction includes 1 TCI state in at least 1 group of TCI states among the 8 groups of TCI states and 1 group of TCI states in which a TCI code is the minimum among the at least 1 group of TCI states.

6. The terminal device of claim 4,

and the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 2 TCI states in at least 1 group of TCI states among the 8 groups of TCI states and 1 group of TCI states in which a TCI code is the minimum among the at least 1 group of TCI states, receives the downlink data channel at the 1 st transmission opportunity in the beam direction indicated by the 1 st TCI state, and receives the downlink data channel at the 2 nd transmission opportunity in the beam direction indicated by the 2 nd TCI state.

7. The terminal device of claim 4,

and the MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any 1 group of TCI states in the 8 groups of TCI states, the downlink data channel of the 1 st transmission opportunity is received in the first beam direction.

8. The terminal device of claim 4,

and sending uplink control information, wherein the uplink control information comprises indication information used for indicating the beam direction for receiving the downlink data channel.

9. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of claims 1 to 3.

10. A network device for implementing the method of any one of claims 1 to 3, comprising

A network sending module, configured to send a downlink control channel;

a network determining module, configured to determine whether a time interval between the downlink control information and the scheduled downlink data channel is smaller than a threshold value;

and the network receiving module is used for receiving the uplink control channel.

11. The network device of claim 10,

and the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 1 TCI state in at least 1 group of TCI states among the 8 groups of TCI states and 1 group of TCI states in which a TCI code is the minimum among the at least 1 group of TCI states, transmits the downlink data channel at the 1 st transmission opportunity in the first beam direction.

12. The network device of claim 10,

and the MAC CE activates 8 groups of TCI states, and when the first beam direction includes 2 TCI states in at least 1 group of TCI states among the 8 groups of TCI states and 1 group of TCI states in which a TCI code is the minimum among the at least 1 group of TCI states, transmits the downlink data channel at the 1 st transmission opportunity in the beam direction indicated by the 1 st TCI state, and transmits the downlink data channel at the 2 nd transmission opportunity in the beam direction indicated by the 2 nd TCI state.

13. The network device of claim 10,

and the MAC CE activates 8 groups of TCI states, and when the first beam direction is not in any 1 group of TCI states in the 8 groups of TCI states, the downlink data channel of the 1 st transmission opportunity is transmitted in the first beam direction.

14. The network device of claim 10,

and receiving uplink control information, wherein the uplink control information comprises indication information used for indicating the beam direction of the downlink data channel.

15. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of claims 1 to 3.

16. A mobile communication system comprising at least 1 terminal device according to any one of claims 4 to 9 and at least 1 network device according to any one of claims 10 to 15.

17. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 3.