CN111510267A

CN111510267A - Method and communication device for beam indication

Info

Publication number: CN111510267A
Application number: CN201910099910.2A
Authority: CN
Inventors: 管鹏; 樊波; 张希
Original assignee: Chengdu Huawei Technology Co Ltd
Current assignee: Chengdu Huawei Technology Co Ltd
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2020-08-07
Anticipated expiration: 2039-01-31
Also published as: WO2020156174A1; CN111510267B

Abstract

The application provides a beam indicating method, which comprises the following steps: the method comprises the steps that network equipment sends configuration information to terminal equipment, wherein the configuration information indicates that a receiving beam of an aperiodic channel state information reference signal (CSI-RS) is used as a receiving beam of a data channel; the network equipment transmits first downlink control information DCI to the terminal equipment, wherein the first DCI is used for indicating a receiving beam of the aperiodic CSI-RS; the network equipment transmits second DCI to the terminal equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS; wherein: the time interval between the first DCI and the second DCI is not less than the aperiodic CSI-RS beam switching time; because the time interval of the network equipment sending DCI twice is larger than or equal to the beam switching capacity of the capacity-limited terminal, the terminal equipment is ensured to switch the receiving beam smoothly, and the subsequent communication is ensured.

Description

Method and communication device for beam indication

Technical Field

The present application relates to the field of wireless communications, and more particularly, to a method and a communication apparatus for beam indication.

Background

In order to meet the transmission requirements of a mobile communication system for large capacity and high speed, a fifth generation mobile communication system (5 generation, 5G) introduces a high-frequency band greater than 6GHz for communication so as to utilize the transmission characteristics of large bandwidth and high speed; one or more uplink and downlink beams can be used for communication between the network equipment and the terminal equipment to form different beam pairs.

The number of active beams supported by different terminal devices is different, and some terminal devices may only support 1 active receiving beam, at this time, if the terminal device receives a frequent beam switching indication issued by the network device, for example: a DCI (downlink control information) level beam switching instruction affects communication with a network device after switching because the capability of a terminal device is limited.

Disclosure of Invention

The application provides a method and a communication device for beam indication, which can avoid that a terminal device cannot normally communicate with a network device after beam switching.

In a first aspect, a beam indication method is provided, including:

the method comprises the steps that the network equipment sends configuration information to the terminal equipment, wherein the configuration information indicates that a receiving beam of an aperiodic (aperiodic) channel state information-reference signal (CSI-RS) is used as a receiving beam of a data channel; the network equipment transmits first downlink control information DCI to the terminal equipment, wherein the first DCI is used for indicating a receiving beam of the aperiodic CSI-RS; the network equipment transmits second DCI to the terminal equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS; wherein: the time interval between the first DCI and the second DCI is not less than aperiodic CSI-RS beam switching time (short for A-CSI-RS (or AP CSI-RS) beam switching time).

The method comprises the steps that terminal equipment receives configuration information issued by network equipment, wherein the configuration information indicates that a receiving wave beam of a non-periodic channel state information reference signal CSI-RS is used as a receiving wave beam of a data channel; the terminal equipment receives first Downlink Control Information (DCI) issued by network equipment, wherein the first DCI is used for indicating a receiving beam of the aperiodic CSI-RS; the terminal equipment receives second DCI issued by the network equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS; if the time interval between the first DCI and the second DCI is not less than the non-periodic CSI-RS beam switching time (A-CSI-RS beam switching time), the terminal equipment receives a data channel issued by the network equipment by using a receiving beam indicated by the second DCI; or if the time interval between the first DCI and the second DCI is less than A-CSI-RS beam switching timing, the terminal equipment abandons the receiving beam indicated by the second DCI.

The above describes the scheme from the perspective of the network device and the terminal device, respectively.

With reference to the foregoing scheme, if the time interval between the first DCI and the second DCI is smaller than the a-CSI-RS mapping timing, the method further includes: and the terminal equipment receives the data channel issued by the network equipment by using the receiving beam indicated by the first DCI, or the terminal equipment receives the data channel issued by the network equipment by using the receiving beam indicated or used last time.

Because the time interval of the network equipment sending DCI for two times is greater than or equal to the beam switching capacity of the capacity-limited terminal, the terminal equipment is ensured to switch receiving beams smoothly, and the communication between the subsequent network equipment and the terminal equipment is ensured; in addition, if the time interval of sending the DCI twice is smaller than the beam switching capacity of the capacity-limited terminal equipment, the receiving beam used or indicated before is used for communicating with the network equipment, so that the communication between the network equipment and the terminal equipment is guaranteed.

In a second aspect, a beam indication method is provided, including:

the method comprises the steps that terminal equipment receives configuration information issued by network equipment, wherein the configuration information indicates that a receiving wave beam of a non-periodic channel state information reference signal CSI-RS is used as a data channel receiving wave beam; the terminal equipment receives downlink control information DCI issued by the network equipment, wherein the DCI is used for indicating a receiving beam of the aperiodic CSI-RS; in a preset time period after the DCI starts, the terminal equipment receives a data channel issued by the network equipment by using a last indication or used receiving beam before the DCI; or after a preset time period after the DCI starts, the terminal equipment receives a data channel issued by the network equipment by using a receiving beam indicated by the DCI; wherein the preset time period is not less than an aperiodic CSI-RS beam switching time (A-CSI-RSbeam switching timing).

In the above scheme, the preset time period is a time interval during which the network device issues an instruction for changing a reception beam of the aperiodic CSI-RS to the terminal device to receive the data channel using the reception beam.

Because the preset time period is set and the DCI is issued to the inside or outside of the preset time period, the terminal equipment adopts different receiving beams to receive the data channels issued by the network equipment, thereby ensuring the smooth switching of the beams on one hand and ensuring the communication between the network equipment and the terminal equipment on the other hand.

In each of the above schemes, the terminal device only supports one active receive beam, that is, the terminal device only supports one active Transmission Configuration Index (TCI), for example: activated PDSCHTCI. It should be noted that the above scheme is also applicable if the terminal device supports multiple active receive beams, i.e. multiple active TCIs.

In the above solutions, the following data transmission is taken as an example, and the network device issues data to the terminal device, so in the above solutions, the data channel is a downlink data channel, for example: a Physical Downlink Shared Channel (PDSCH).

Each of the above schemes is described by taking downlink data transmission as an example, and each of the following schemes is described by taking uplink data transmission as an example, that is, a terminal device sends uplink data to a network device, so in each of the following schemes, the data channel is an uplink data channel, for example: a Physical Uplink Shared Channel (PUSCH).

In a third aspect, a beam indicating method is disclosed, including:

the method comprises the steps that network equipment sends configuration information to terminal equipment, wherein the configuration information indicates that a sending beam corresponding to a receiving beam of an aperiodic channel state information reference signal (CSI-RS) is used as a sending beam of an uplink data channel; the network equipment transmits first downlink control information DCI to the terminal equipment, wherein the first DCI is used for indicating a receiving beam of the aperiodic CSI-RS; the network equipment transmits second DCI to the terminal equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS; wherein: the time interval between the first DCI and the second DCI is not less than an aperiodic CSI-RS beam switching time (A-CSI-RS beam switching timing).

The method comprises the steps that terminal equipment receives configuration information issued by network equipment, wherein the configuration information indicates that a sending beam corresponding to a receiving beam of a non-periodic channel state information reference signal (CSI-RS) is used as a sending beam of an uplink data channel; the terminal equipment receives first Downlink Control Information (DCI) issued by network equipment, wherein the first DCI is used for indicating a receiving beam of the aperiodic CSI-RS; the terminal equipment receives second DCI issued by the network equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS; if the time interval between the first DCI and the second DCI is not less than the aperiodic CSI-RS beam switching time, the terminal equipment uses the transmission beam corresponding to the receiving beam indicated by the second DCI to transmit an uplink data channel to the network equipment; or if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time, the terminal equipment abandons the transmission beam corresponding to the receiving beam indicated by the second DCI.

With reference to the foregoing solution, if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time, the method further includes: and the terminal equipment transmits the uplink data channel to the network equipment by using the transmission beam corresponding to the receiving beam indicated by the first DCI, or the terminal equipment transmits the uplink data channel to the network equipment by using the transmission beam indicated or used last time.

Because the time interval of the network equipment sending DCI for two times is greater than or equal to the beam switching capacity of the capacity-limited terminal, the smooth switching of the beam by the terminal equipment is ensured, and the communication between the subsequent network equipment and the terminal equipment is ensured; in addition, if the time interval of sending the DCI twice is less than the beam switching capability of the terminal equipment with limited capability, the previously used or indicated transmission beam is used for communicating with the network equipment.

In a fourth aspect, a beam indicating method is provided, including:

the method comprises the steps that terminal equipment receives configuration information issued by network equipment, wherein the configuration information indicates that a sending beam corresponding to a receiving beam of a non-periodic channel state information reference signal (CSI-RS) is used as a sending beam of an uplink data channel; the terminal equipment receives downlink control information DCI issued by the network equipment, wherein the DCI is used for indicating a receiving beam of the aperiodic CSI-RS; in a preset time period after the DCI starts, the terminal equipment uses a last indication or used transmission beam before the DCI to transmit an uplink data channel to the network equipment; or after a preset time period after the DCI starts, the terminal equipment uses a sending beam corresponding to the receiving beam indicated by the DCI to send an uplink data channel to the network equipment; wherein the preset time period is not less than aperiodic CSI-RS beam switching time (A-CSI-RS beam switching timing).

In the above scheme, the preset time period is a time interval during which the network device issues an instruction for changing a receiving beam of the aperiodic CSI-RS to the terminal device to transmit the uplink data channel by using a transmitting beam corresponding to the receiving beam.

In each of the above schemes, the terminal device only supports one active transmission beam, that is, the maximum number of active spatial relationships supported by the terminal device is 1. It should be noted that the above scheme is also applicable if the terminal device supports multiple active transmit beams, i.e. the number of active spatial relations is multiple.

Because the preset time period is set, and different sending beams are adopted to send the uplink data channel to the network equipment within or outside the preset time period from the DCI issuing, on one hand, the smooth switching of the beams is ensured, and on the other hand, the communication between the network equipment and the terminal equipment is ensured.

In the foregoing solutions of the first aspect to the fourth aspect, the DCI sent by the network device is transmitted through a downlink control channel, for example: a Physical Downlink Control Channel (PDCCH).

The aperiodic CSI-RS beam switching time is an aperiodic CSI-RS beam switching time of the terminal device, and may be a capability of the terminal device.

The configuration information indicates that the reception beam of the aperiodic CSI-RS is taken as the reception beam of the data channel, and specifically indicates that a QC L (quasi co-location) assumption of the aperiodic CSI-RS is taken as the QC L assumption of the data channel.

The DCI mentioned in the above schemes is used for indicating a receiving beam of the aperiodic CSI-RS, and has a function of informing the terminal device to change the receiving beam of the aperiodic CSI-RS, and the DCI is used for indicating the receiving beam of the aperiodic CSI-RS, specifically, the DCI is used for indicating the QC L assumption of the aperiodic CSI-RS.

In addition, the configuration information indicating that the receiving beam of the aperiodic CSI-RS is used as the receiving beam of the data channel may also be preset, and the network device does not need to configure the terminal device.

Apparatuses corresponding to the above-described respective methods are described below.

The communication device may be a terminal device or a network device in the above methods, or may be a chip or a functional module in the terminal device or the network device. The device has the function of realizing the terminal equipment or the network equipment in the methods. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the apparatus includes: the transceiver module, or called a communication module, may include a transmitting module and/or a receiving module; the receiving and transmitting function of the signal is realized; optionally, the apparatus further comprises a processing module for implementing processing functions other than signal transmission; the transceiver module may be at least one of a transceiver, a receiver, and a transmitter, for example, and the transceiver module may include a radio frequency circuit or an antenna. The processing module may be a processor. Optionally, the apparatus further comprises a storage module, which may be a memory, for example. When included, the memory module is used to store computer programs or instructions. The processing module is connected to the storage module, and the processing module can execute the programs or instructions stored in the storage module or can be derived from other programs or instructions to enable the device to execute the method of any one of the aspects.

The processor mentioned in any of the above may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs of the communication methods in the above aspects.

In a fifth aspect, a computer storage medium is provided, in which a computer program is stored, which, when executed by a computer or a processor, implements the method of the above aspects.

In a sixth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

In a seventh aspect, a communication system is provided, which includes the above network device and terminal device.

In an eighth aspect, a processor is provided for coupling with a memory for performing the method of the above aspects.

In a ninth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being used for communicating with an external device or an internal device, the processor being used for implementing the method of the above aspects.

Optionally, the chip may further include a memory having instructions stored therein, and the processor may be configured to execute programs or instructions stored in the memory, or derived from other programs or instructions. When the program or instructions are executed, the processor is configured to implement the methods of the various aspects described above.

Alternatively, the chip may be integrated on a terminal device or a network device.

Drawings

Fig. 1 shows a schematic diagram of a communication system of an embodiment of the present application.

Fig. 2 is a schematic diagram illustrating a beam switching scenario according to an embodiment of the present application.

Fig. 3 is a flowchart of a beam switching method according to an embodiment of the present application.

Fig. 4 is a flowchart of a beam switching method according to an embodiment of the present application.

Fig. 5 is a flowchart of a beam switching method according to an embodiment of the present application.

Fig. 6 is a flowchart of a beam switching method according to an embodiment of the present application.

Fig. 7 is a schematic block diagram of a communication device provided in an embodiment of the present application.

Fig. 8 is a schematic block diagram of another communication device provided in an embodiment of the present application.

Fig. 9 is a schematic block diagram of another communication device provided in an embodiment of the present application.

Fig. 10 is a schematic block diagram of still another communication device provided in an embodiment of the present application.

Fig. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

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

The embodiments of the present application are applicable to a multi-carrier communication system based on beams, such as a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a long term evolution (long term evolution, L TE) system, a L TE Frequency Division Duplex (FDD) system, a L TE Time Division Duplex (TDD), a universal mobile communication system (universal mobile communication system, UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) system, a future generation (new generation, NR 5G) system, etc.

Fig. 1 shows a schematic diagram of a communication system 100 suitable for use in the method and apparatus for interference measurement of the embodiments of the present application. As shown, the communication system 100 may include at least one network device, such as the network device 110 shown in fig. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in fig. 1. Network device 110 and terminal device 120 may communicate via a wireless link.

Each communication device, such as network device 110 or terminal device 120 in fig. 1, may be configured with multiple antennas. The plurality of antennas may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals. Each communication device additionally includes a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art. Therefore, the network equipment and the terminal equipment can communicate through the multi-antenna technology.

It should be understood that the network device in the wireless communication system may be any device having a wireless transceiving function. Such devices include, but are not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved Node B, or Home Node B, HNB), BaseBand Unit (BBU), Access Point (AP) in wireless fidelity (WIFI) system, wireless relay Node, wireless backhaul Node, Transmission Point (TP), or transmission and reception Point (TRP, TP), etc., and may also be 5G, e.g., NR, nodeb (gbb, Base Station) in the system, or transmission Point (TRP or TP), where one or a group of Base stations in the 5G system may include multiple antennas, or may also be a network panel or a network panel, such as a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, a gNB may include a Centralized Unit (CU) and a DU, the gNB may further include a Radio Unit (RU), the CU realizes a partial function of the gNB, and the DU realizes a partial function of the gNB, for example, the CU realizes a Radio Resource Control (RRC), a Packet Data Convergence Protocol (PDCP) layer, and the DU realizes a function of a radio link control (R L C) layer, a Media Access Control (MAC) layer, and a physical (physical) layer.

It should also be understood that terminal equipment in the wireless communication system may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in telemedicine (remote), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios.

To facilitate understanding of the embodiments of the present application, a brief description of several terms referred to in the present application will be given below.

1. Beam (beam)

One of the main problems of high frequency communication is that signal energy drops sharply with transmission distance, resulting in short signal transmission distance. In order to overcome the problem, the high-frequency communication adopts an analog beam technology, the weighting processing is carried out through a large-scale antenna array, the signal energy is concentrated in a smaller range, and a signal (called an analog beam, called a beam for short) similar to a light beam is formed, so that the transmission distance is increased.

A beam is a communication resource. The beam may be a wide beam, or a narrow beam, or other type of beam. The technique of forming the beam may be a beamforming technique or other technical means. The beamforming technique may be embodied as a digital beamforming technique, an analog beamforming technique, a hybrid digital/analog beamforming technique. Different beams may be considered different resources. The same information or different information may be transmitted through different beams. Alternatively, a plurality of beams having the same or similar communication characteristics may be regarded as one beam. A beam may be formed by one or more antenna ports for transmitting data channels, control channels, sounding signals, and the like. The one or more antenna ports forming one beam may be regarded as one set of antenna ports.

The beams include a transmit beam and a receive beam. The transmit beam may refer to the distribution of signal strength formed in different spatial directions after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of the antenna array to reinforce or weaken the reception of the wireless signal in different spatial directions.

In the current NR protocol, beam information may be indicated by a quasi-co-location (QC L) relationship of antenna ports, and specifically, a quasi-co-location relationship between one resource (or antenna port) and another resource (or antenna port) may be indicated in indication information (e.g., Downlink Control Information (DCI)), so as to indicate that beams corresponding to the two resources (or antenna ports) have the same spatial characteristics, and may be received by using the same receiving beam.

In addition, in general, one beam corresponds to one demodulation reference signal (DMRS) port/port group or one transmission configuration number (TCI) or one TRP or one sounding reference Signal Resource Indicator (SRI) (for uplink data transmission), and thus, different beams may also be represented by different DMRS port/port groups or TCIs or TRPs or SRIs.

Since DMRS port/port group, TCI, TRP, SRI, resource index of CSI-RS, index of SS/PBCH block, resource index of SRS, and resource index of TRS may all represent a beam. Therefore, the DMRS ports/port groups and TCIs hereinafter may also be replaced with beams, TRPs, SRIs, resource indexes of CSI-RSs, indexes of SS/PBCH blocks, resource indexes of SRS, or resource indexes of TRS, and the replacement does not change the essence of the method provided by the embodiments of the present application.

2. Channel state information acquisition (CSI acquisition): the method comprises the steps of obtaining Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), channel-Quality indicator (CQI), Rank Indicator (RI), precoding-matrix indicator (PMI), Signal to interference and noise ratio (SINR) and the like.

3. Time domain property: in the interference measurement resource configuration and the interference measurement reporting configuration, different time domain behaviors may be indicated by different time domain attributes. The time domain attribute of the interference resource configuration can be used for indicating the time domain behavior of the terminal equipment for receiving the interference signal; the time domain attribute configured for measurement reporting can be used for indicating the time domain behavior of the interference measurement result reported by the terminal equipment.

By way of example and not limitation, time domain attributes may include, for example, periodic (periodic), semi-persistent (semi-persistent), and aperiodic (aperiodic).

It should be understood that the embodiment of the NR protocol listed above for the beams is only an example and should not constitute any limitation to the present application. This application does not exclude the possibility that other terms may be defined in future protocols to have the same or similar meaning.

4. Quasi-co-location (QC L), or quasi-co-location, QC L relationship is used to indicate that there are one or more identical or similar communication features between the resources, and for the resources with co-location, the same or similar communication configuration may be used, for example, if two antenna ports have QC L relationship, the large scale characteristics of the channel that one port transmits a symbol may be inferred from the large scale characteristics of the channel that the other port transmits a symbol, the reference signals corresponding to the antenna ports with QC L relationship have the same parameters, or the parameters of one antenna port may be used to determine the parameters of the other antenna port with QC L relationship to the antenna port, or both antenna ports have the same parameters, or the parameter difference between the two antenna ports is less than a certain threshold.

The angle may be a decomposition value of different dimensions, or a combination of decomposition values of different dimensions. The antenna ports are antenna ports with different antenna port numbers, and/or antenna ports with the same antenna port number for transmitting or receiving information in different time and/or frequency and/or code domain resources, and/or antenna ports with different antenna port numbers for transmitting or receiving information in different time and/or frequency and/or code domain resources. The resource identification may include: CSI-RS resource identifier, or SRS resource identifier, or SSB resource identifier, or resource identifier of a preamble sequence transmitted on a Physical Random Access Channel (PRACH), or resource identifier of a demodulation reference signal (DMRS), for indicating a beam on a resource.

In the NR protocol, the QC L relationship can be classified into the following four types based on different parameters:

type a (type a): doppler frequency shift, Doppler spread, average time delay and time delay spread;

type b (type b): doppler shift, doppler spread;

type c (type c): doppler shift, average delay; and

type d (type d): the space receives the parameters.

The QC L referred to in the embodiments of the present application is QC L of type D, hereinafter, without specific mention, QC L may be understood as QC L of type D, i.e., QC L defined based on spatial reception parameters, referred to as spatial QC L.

When the QC L relationship refers to the QC L relationship of type D, it may be considered as spatial QC L (spatial QC L), when the antenna port satisfies the spatial QC L relationship, the QC L relationship between the port of the downlink signal and the port of the downlink signal, or between the port of the uplink signal and the port of the uplink signal, may be that the two signals have the same AOA or AOD, and is used to represent that the two signals have the same receive beam or transmit beam.

From the transmitting end, if it is said that two antenna ports are in the spatial domain QC L, it may mean that the corresponding beam directions of the two antenna ports are spatially identical, from the receiving end, if it is said that two antenna ports are in the spatial domain QC L, it may mean that the receiving end can receive signals transmitted by the two antenna ports in the same beam direction.

The signals transmitted on the ports having the spatial QC L relationship may also have corresponding beams including at least one of the same receive beam, the same transmit beam, a transmit beam corresponding to the receive beam (corresponding to a reciprocal scene), and a receive beam corresponding to the transmit beam (corresponding to a reciprocal scene).

The signals transmitted on the ports having the spatial QC L relationship may also be understood as receiving or transmitting signals using the same spatial filter.

Signals transmitted on ports having spatial QC L relationship may also be understood as having corresponding beam pair connections (BP L), the corresponding BPs L including at least one of the same downstream BP L, the same upstream BP L, the upstream BP L corresponding to downstream BP L, and the downstream BP L corresponding to upstream BP L.

Therefore, the spatial reception parameter (i.e., the QC L of type D) may be understood as a parameter for indicating direction information of the reception beam.

5, QC L directive and QC L hypothesis

The introduction of QC L has shown that if two antenna ports have quasi-co-located relationship, the large scale characteristics of the channel that one port carries a symbol can be inferred from the large scale characteristics of the channel that the other port carries a symbol, so when the base station indicates that there is QC L relationship between the two ports, the terminal should assume that the large scale characteristics of the channel that the two ports carry a symbol are identical.

6. Each TCI state may include an Index of a serving cell (service cell Index), a bandwidth part (BWP) identifier (identifier, ID), and a reference signal resource identifier (srsrd), which may be at least one of a non-zero power (NZP) CSI-RS reference signal resource identifier (NZP-CSI-RS-resource ID), a non-zero power CSI-RS reference signal resource set identifier (NZP-CSI-RS-ResourceId), or a SSB Index (SSB-Index).

The definition of TCI in 3GPP is that of Indicating a transmission configuration of whichinplus QC L-relationships between the D L RSs in one RS set and the PDSCHDMRS ports.

Chinese is translated by indicating the QC L relationship between the transmission configuration, including the downstream signal ports [ of ] and PDSCH DMRS ports in a set of reference signals.

The TCI may be used to indicate QC L information of a physical downlink control channel (PDCCH for short) and a physical downlink shared channel (PDSCH for short), and specifically may be used to indicate which reference signal meets a QC L relationship with a DMRS of the PDCCH/PDSCH, so that the terminal may receive the PDCCH/PDSCH by using a spatial parameter (e.g., a receive beam) that is the same as or similar to a spatial parameter of the reference signal.

The TCI may specifically indicate which reference signal the DMRS of the PDCCH/PDSCH satisfies the QC L relationship with by reference signal index.

Referring to fig. 2, a base station (e.g., a gNB) may configure a plurality of reception beams of an aperiodic CSI-RS (i.e., a plurality of QC L hypotheses of the aperiodic CSI-RS) for a terminal (e.g., a UE) and activate one of the reception beams (i.e., one QC L hypothesis) as a reception beam of a current aperiodic CSI-RS (QC L hypothesis).

Further, the base station may send DCI to the terminal through a control channel (e.g., PDCCH), notify the terminal to change a receiving beam of the aperiodic CSI-RS (i.e., change the QC L assumption of the aperiodic CSI-RS), then the terminal receives the aperiodic CSI-RS sent by the base station using the changed receiving beam, and then the terminal performs measurement and reporting of the aperiodic CSI-RS.

There is a time interval (that is, the time interval from the sending of the DCI from the base station to the changing of the receive beam of the aperiodic CSI-RS by the terminal to the sending of the aperiodic CSI-RS by the base station in fig. 2), within this time interval, if the base station again indicates the changing of the receive beam of the aperiodic CSI-RS by the DCI, if the terminal is a terminal with limited capability and only supports one activated receive beam (that is, one active TCI), the receive beam cannot be changed, or after the change of the receive beam, the receiving of the data channel cannot be performed.

Thus, when a limited-capability terminal reports to the base station that it indicates support for one active TCI (i.e., only one active receive beam), it does not expect to receive a beam switch indication that is too dynamic (i.e., DCI level). If the reference signal of the activated tci (active tci) configured by the base station is the aperiodic CSI-RS, the aperiodic CSI-RS serving as the reference signal may dynamically switch the beam by the DCI itself. This will result in the data channel (e.g., PDSCH) having only one active TCI (i.e., one active receive beam), but the actual receive beam is still dynamically switched beyond the capability of this type of terminal, resulting in collisions.

The beam indication method of the embodiment of the application is to solve the conflict and ensure normal communication between the terminal and the base station.

Referring to fig. 3, the method includes:

201: and reporting the terminal capability.

The terminal reports to the base station the number of dynamic receive beams it supports, for example, the maximum number of supported activated TCIs is 1, that is, one dynamic receive beam is supported.

The terminal capability in 3GPP R15 is reported as follows:

1. the maximum number of activated TCIs supported is {1,2,4,8} and so on, and the number of activated TCIs is the number of dynamic receiving beams supported by the terminal. The definition in the NR protocol is as follows:

maxNumberActiveTCI-PerBWP

Defines maximum number of TCI states for PDSCH reception that can beactivated for the UE using MAC Control Element from the set of RRC configuredTCI states as defined in TS 38.214clause 5.1.5.

the Chinese translation is as follows: the maximum number of activated TCIs per BWP defines the maximum number of TCIs for PDSCH reception that can be activated for a terminal from RRC-configured TCI states using a Medium Access Control Element (MAC-CE).

From this capability, the terminal with limited capability can report and support 1 active PDSCH TCI, that is, 1 active PDSCH receiving beam. Therefore, such terminals do not want to support excessively dynamic (DCI-level) PDSCH beam switching, and such terminals do not want to track multiple beams simultaneously.

The scheme of each embodiment of the present application is proposed for a terminal with limited capability, but if the terminal capability is not limited, for example: the number of TCIs supported by the terminal is plural, and the method of each embodiment is also applicable.

2. When the TCI of the terminal is 1, an additional TCI dedicated for control, that is, an additional beam for transmitting a control channel (e.g., PDCCH) is supported for receiving DCI transmitted by the base station. The definition in the NR protocol is as follows:

additionalActiveTCI-StatePDCCH

Indicates whether the UE supports one additional active TCI-State forcontrol in addition to the supported number of active TCI-States forPDSCH.The UE can include this field only if maxNumberConfiguredTCIstatesPerCCin tci-StatePDSCH is set to 1.Otherwise,the UE does not include this field.

the Chinese translation is as follows: the additional control channel activated TCI state defines whether the terminal supports one additional activated TCI state for control in addition to the supported activated TCI state for PDSCH. The terminal can report this capability field only if it reports a maxnumberbonfigurredtcistatespercc of 1. Otherwise, the UE does not report this capability field.

A-CSI-RS beam switching timing: the beam switching time of the aperiodic CSI-RS, i.e. the time interval in which the DCI indicates transmission to the aperiodic CSI-RS (AP CSI-RS) (refer to fig. 2), takes values of {14,28,48,224,336 48,224,336 … } etc. OFDM symbol times. The definition in the NR protocol is as follows:

beamSwitchTiming

Indicates the minimum number of OFDM symbols between the DCItriggering of aperiodic CSI-RS and aperiodic CSI-RS transmission.The numberof OFDM symbols is measured from the last symbol containing the indication tothe first symbol of CSI-RS.The UE includes this field for each supported sub-carrier spacing.

the Chinese translation is as follows: and the beam switching time refers to the minimum OFDM symbol number between the triggering of the aperiodic CSI-RS by the DCI and the transmission of the aperiodic CSI-RS. The number of OFDM symbols refers to the number of OFDM symbols from the last symbol containing DCI to the first symbol containing CSI-RS. The terminal shall report this capability field for each sub-carrier interval supported.

Beam reporting timing: the beam reporting time, i.e. the time interval from the aperiodic CSI-RS transmission to CSI reporting (refer to fig. 2), is set to {14,28 … } and other OFDM symbol times. The aperiodic CSI may be reported through a Physical Uplink Shared Channel (PUSCH). The definition in the NR protocol is as follows:

beamReportTiming

Indicates the number of OFDM symbols between the last symbol of SSB/CSI-RS and the first symbol of the transmission channel containing beamreport.The UE includes this field for each supported sub-carrier spacing.

the Chinese translation is as follows: the beam reporting time refers to the number of OFDM symbols from the last symbol containing SSB/CSI-RS to the first symbol containing beam reporting. The terminal shall report this capability field for each sub-carrier interval supported.

DCI indicates a time interval to PDSCH transmission, taking values of {14,28, … } etc. OFDM symbol times. The definition in the NR protocol is as follows:

timeDurationForQCL

Defines minimum number of OFDM symbols required by the UE to performPDCCH reception and applying spatial QCL information received in DCI forPDSCH processing as described in TS 38.214clause 5.1.5,i.e.Threshold-Sched-Offset.UE shall indicate one value of the minimum number of OFDM symbols pereach subcarrier spacing of 60kHz and 120kHz.

the Chinese translation is as follows, QC L time interval defines the minimum OFDM symbol number of space QC L information for PDSCH reception required by the terminal for PDCCH reception and DCI carried in the application PDCCH.

202: the base station issues the configuration information, and the terminal receives the configuration information issued by the base station.

Wherein the configuration information indicates that a reception beam of the terminal aperiodic CSI-RS is configured as a reception beam of the data channel.

Specifically, the content of the base station configuration includes:

the contents configured by RRC (radio resource control) include:

1, available TCI state list of PDSCH, wherein the reference signal of at least one TCI is aperiodic CSI-RS (AP CSI-RS or a-CSI-RS), that is, the reference signal of at least one beam is APCSI-RS; that is, the reception beam of the AP CSI-RS is configured as the reception beam of the data channel (i.e., PDSCH).

2, trigger state of aperiodic CSI-RS

Each trigger state can configure different receiving beams for aperiodic CSI-RS resource, and in the 3GPP protocol, each trigger state configures different QC L list for aperiodic CSI-RS resource set in the form of TCI.

The contents of the MAC-CE activation include:

1, activated TCI of PDSCH, only one activated TCI of PDSCH, that is, 1 activated beam of PDSCH, and the reference signal for activating TCI is aperiodic CSI-RS. It should be noted that if there are multiple PDSCH active beams, the scheme is also applicable to the case where the reference signal for activating the TCI in the TCI is the aperiodic CSI-RS.

And 2, activating trigger states of the aperiodic CSI-RS, wherein 64 trigger states can be activated at maximum.

The base station may select one reception beam for the terminal as the current aperiodic CSI-RS from 64 beams through DCI.

203: and the base station dynamically changes the receiving beam of the aperiodic CSI-RS through the DCI.

The base station indicates a trigger state of the aperiodic CSI-RS through a QC L assumption of DCI dynamic indication of the aperiodic CSI-RS, namely, indicates a receiving beam of the aperiodic CSI-RS, and the DCI (usually a CSI request field) sent by the base station has a selected trigger state of the aperiodic CSI-RS to inform the terminal equipment that the receiving beam of the aperiodic CSI-RS changes.

And after receiving the DCI, the terminal receives the CSI-RS and/or the PDSCH sent by the base station by adopting the changed receiving wave beam (namely, the assumption of QC L).

Before 203, the base station and the terminal can perform normal communication, and the application does not pay attention to the communication.

204: and the base station sends the CSI-RS, and the terminal measures the CSI-RS and reports the measurement result.

The terminal determines the changed receiving beam of the aperiodic CSI-RS according to the indication of 203, receives the CSI-RS sent by the base station through the beam, and reports the measurement result (CSI). furthermore, the terminal can re-determine the receiving beam according to the measurement result (i.e. the assumption of QC L), and the base station can re-determine the receiving beam of the terminal according to the reported measurement result, or determine to still use the original receiving beam according to the measurement result.

This step is optional.

205: the base station sends DCI to schedule PDSCH, and the terminal receives PDSCH sent by the base station.

In the applicable scenario of the present application, the reference signal of the TCI indicated by the TCI field in the DCI is the aperiodic CSI-RS in step 203/204.

If 205 is performed directly after 203, the QC L hypothesis (i.e. the PDSCH receiving beam) indicated by the TCI of the PDSCH should be changed accordingly since the aperiodic CSI-RS receiving beam (i.e. the QC L hypothesis) has changed in 203.

Optionally, if step 204 occurs before step 205, the terminal uses QC L hypothesis (i.e., receive beam) determined in step 204 to receive pdsch, because aperiodic CSI-RS measurement may be used for receive beam training, and thus the optimal receive beam of the aperiodic CSI-RS in step 204 may have been updated, although the optimal beam may not be the same.

The DCI in 205 and 203 should generally be different DCI.

206, the base station dynamically changes the receiving beam of the aperiodic CSI-RS through the DCI again (i.e. the terminal is instructed to change the QC L hypothesis by sending down the DCI), the indicating manner is similar to 203, and reference may be made to the description of 203.

Referring to fig. 2, the time interval between steps 203 and 206 is the time interval between DCI indication and aperiodic CSI-RS (AP CSI-RS) transmission, that is, capability 3 reported by the terminal in 201.

The time interval between two indications (i.e. DCI in 203 and DCI in 206) issued by the base station to change the receiving beam of the aperiodic CSI-RS is greater than or equal to the preset time interval, i.e. the time interval between 203 and 206 is not less than the preset time interval; wherein the two DCIs respectively indicate different receiving beams of the same aperiodic CSI-RS for the terminal.

For example: and the time between two DCI trigger times of the aperiodic CSI-RS is not less than X.

X may be defined by a standard in advance or configured to the terminal by the base station, and the unit may be slot.

X may be embodied in step 202 if it is base station configured; that is, X is added to the configuration information to limit the time interval between two DCIs not less than X.

In addition, X satisfies the beam switching capability (A-CSI-RS beam switching timing) reported by the terminal, and the selectable values are {14,28,48,224,336} and other OFDM symbol times.

If X is the terminal capability, it should also be embodied in step 201, that is, in step 201, the terminal reporting capability includes X, which is used to limit the time interval between two DCI orders to be not less than X.

X may be a newly added terminal capability for the terminal to instruct the base station to issue the minimum time interval between two indications for changing the receive beam of the aperiodic CSI-RS. In an embodiment, the terminal reports the capability X to the base station, and after the base station receives the capability reported by the terminal, the time interval between two DCI releases is not less than X.

For example, in step 201, the capability reported by the terminal includes 3 and 4, and the value of X may be 3 or 3+4, that is, the time interval between two QC L instructions issued by the base station for changing the aperiodic CSI-RS is greater than or equal to a-CSI-RS Beam switching timing, or greater than or equal to a-CSI-RS Beam switching timing + Beam reporting timing.

If the time interval between two times of sending DCI by the base station is smaller than X, and the terminal receives the second DCI (DCI in step 206), and then determines that the time interval between steps 203 and 206 is smaller than X, the terminal abandons receiving the PDSCH using the receive beam indicated by 206, that is, the subsequent terminal still receives the PDSCH according to the QC L hypothesis (receive beam) indicated by 203 or 204, or the latest indication (DCI indication not 206) or the used receive beam (QC L hypothesis) may be used to receive the PDSCH, for example, the receive beam used before 203 to communicate with the base station.

204, 205, 206 have no chronological order, 204 being optional. The step after 206 is repeated 204 and 205 until the terminal receives the PDSCH.

207: and the base station sends the CSI-RS, and the terminal measures and reports the measurement result.

208: the base station sends DCI scheduling PDSCH, and the terminal receives PDSCH.

The 207-208 steps are repeated 204-205.

In the above embodiment, if the condition that the time interval between the steps 203 and 206 is not lower than X (i.e., the minimum time interval between the base station issuing the indication for changing the reception beam of the aperiodic CSI-RS twice) is satisfied, the terminal assumes reception of the PDSCH according to QC L indicated by 206, and if not, the terminal abandons the QC L assumption of step 206 and still receives the PDSCH according to QC L assumption indicated by 203 or 204, or uses the QC L assumption (reception beam) indicated or used last time, thereby avoiding failure of terminal beam switching and failure of normal communication with the base station.

Optionally, in steps 205 and 208, whether the terminal uses the QC L hypothesis indicated in the DCI to receive the PDSCH depends on the time interval between the DCI and the PDSCH, if the time interval between the DCI and the PDSCH is greater than or equal to 5, which is the capability reported by the terminal in 201, the terminal may use the QC L hypothesis indicated in the DCI to receive the PDSCH, and if the time interval between the DCI and the PDSCH is less than 5, which is the capability reported by the terminal in 201, the terminal uses the same QC L hypothesis as the PDCCH to receive the PDSCH, that is, the terminal uses the same receiving beam as the PDCCH to receive the PDSCH.

In the above embodiment, a time interval X is set, the base station is instructed to issue the minimum time interval between instructions for changing the receive beam of the aperiodic CSI-RS twice, the time intervals of the two DCI times are compared with X, and different processing manners are adopted for comparison results; in another embodiment, another time interval Y may be set, and referring to fig. 4, another embodiment of the beam indication method is as follows:

301: and terminal capability feedback.

As with 201, reference may be made to 201.

302: and the base station issues the configuration, and the terminal receives the configuration of the base station.

As in 202.

303: and the base station dynamically changes the receiving beam of the aperiodic CSI-RS through the DCI.

As in 203.

Before 303, the base station and the terminal can perform normal communication, and the application does not pay attention to the communication.

304: and the base station sends the CSI-RS, and the terminal measures and reports the measurement result.

This step is optional, the same as 204.

305: the base station sends DCI to schedule PDSCH, and the terminal receives PDSCH sent by the base station.

In the applicable scenario of the present application, the reference signal in the TCI indicated by the TCI field in the DCI is the aperiodic CSI-RS in step 303/304.

The DCI in 303 and 305 is typically a different DCI.

Although the QC L assumption (i.e., reception beam) of the aperiodic CSI-RS has changed in 303, since the CSI-RS may not have been transmitted, the terminal has not measured the aperiodic CSI-RS for the last time, and a new best reception beam has not been determined, the QC L assumption (i.e., reception beam) that the terminal receives PDSCH may not change.

The embodiment introduces a time period Y, within the DCI starting Y time (including the Y ending time point), the terminal abandons receiving the PDSCH using the receiving beam indicated by the DCI in 303, and the terminal may assume (receive beam) receiving the PDSCH using the QC L indicated or used last time before 303, which may refer to the starting time of the DCI issuing time point Y in 303 in the previous embodiment.

After Y time, the terminal assumes (i.e., receives the beam) to receive the PDSCH using QC L indicated by the DCI in 303.

The value of Y is similar to that of X, and Y may be defined by a standard in advance or configured to the terminal by the base station.

Y, if the base station is configured, may be embodied in step 302; that is, Y is added to the configuration information to instruct the base station to issue an instruction for changing the reception beam of the aperiodic CSI-RS to the time interval at which the terminal receives the data channel using the reception beam.

In addition, Y satisfies the beam switching capability (A-CSI-RS beam switching timing) reported by the terminal, and the selectable values are {14,28,48,224,336} and other OFDM symbol times.

If Y is the terminal capability, it should also be embodied in step 301, that is, in step 301, the terminal reporting capability includes Y, which is used to instruct the base station that the terminal can support to issue an instruction for changing the reception beam of the aperiodic CSI-RS to a time interval when the terminal applies the reception beam to receive the data channel.

Y may be a newly added terminal capability, which is used for the terminal to instruct the base station that the terminal can support to issue an instruction for changing the receiving beam of the aperiodic CSI-RS to the time interval when the terminal applies the receiving beam to receive the data channel.

Y may also reuse the value of the existing terminal capability, for example, in step 301, the terminal reporting capability includes 3 and 4, and the value of Y may be 3 or 3+ 4. That is, the Y time after the base station issues the DCI for changing the aperiodic CSI-RS is greater than or equal to the a-CSI-RS Beam switching timing, or greater than or equal to the a-CSI-RS Beam switching timing + Beam reporting timing.

Therefore, whether the terminal assumes reception of PDSCH with QC L indicated in 303 depends on the time interval between DCI in 303 and PDSCH transmission in 305.

304, 305, 306 have no chronological order, 304 being optional. The step following 305 is a repeat 303-305.

306: and the base station dynamically changes the receiving beam of the aperiodic CSI-RS again through the DCI.

Step 303 is repeated.

307: and the base station sends the CSI-RS, and the terminal measures and reports.

Step 304 is repeated.

308: the base station sends DCI scheduling PDSCH, and the terminal receives PDSCH.

Step 305 is repeated.

The DCI in 306 and 308 is typically a different DCI.

According to the method described in 305, whether the terminal assumes reception of PDSCH with QC L indicated in 306 depends on the time interval between DCI in 306 and PDSCH transmission in 308.

Therefore, in the embodiment, after Y time after the aperiodic CSI-RS DCI trigger, the terminal receives the PDSCH by using QC L indicated by DCItrigger, the aperiodic CSI-RS DCI trigger issued by the base station is abandoned within the Y time, the PDSCH is assumed to be received by using QC L indicated or used for the last time, and the DCI trigger refers to the DCI trigger with the QC L assumption (receiving beam) of the AP CSI-RS changed, so that failure in switching the terminal beam is avoided, and normal communication between the terminal and the base station is ensured.

Optionally, in steps 305 and 308, whether the terminal uses the QC L hypothesis indicated in the DCI to receive the PDSCH depends on the time interval between the DCI and the PDSCH, if the time interval between the DCI and the PDSCH is greater than or equal to 5, which is the capability reported by the terminal in 301, the terminal may use the QC L hypothesis indicated in the DCI to receive the PDSCH, and if the time interval between the DCI and the PDSCH is less than 5, which is the capability reported by the terminal in 201, the terminal uses the same QC L hypothesis as the PDCCH to receive the PDSCH, that is, the terminal uses the same receiving beam as the PDCCH to receive the PDSCH.

In the above embodiment, the transmission of downlink data is taken as a scenario, that is, the base station sends the downlink data to the terminal; the data channels mentioned above are downlink data channels, for example: a PDSCH; in addition, the method of the embodiment of the present application may also be applied to a scenario of uplink data transmission, that is, a scenario in which a terminal sends uplink data to a base station:

referring to fig. 5, another embodiment is as follows:

401: and reporting the terminal capability.

The terminal reports to the base station that it supports only one dynamic transmit beam, i.e., the maximum number of supported active spatial relations (spatial relations) is 1. The spatial relationship is a description manner of the uplink transmission beam in 3GPP R15, and may also be described as a spatial domain transmission filter (spatial domain transmission filter).

Of course, in the following embodiments, the scheme is also applicable if the terminal supports multiple dynamic transmit beams, i.e., the maximum supported active spatial relationship number is multiple.

In addition to the capability reported by the terminal in 201, the capability report of the terminal in 3GPP R15 also includes the following contents:

6.maxNumberActiveSpatialRelations：

the maximum number of active spatialrelations supported is set to {1,2,4,8}, and the like, and the number of active spatialrelations is the number of dynamic transmission beams supported by the terminal.

maxNumberActiveSpatialRelations

indicates the maximum number of active spatial relations withregarding to PUCCH and SRS for PUSCH,per BWP per CC(carrier component)；

The Chinese translation is as follows: the maximum active spatial correlation coefficient refers to the maximum number of active spatial correlations used to transmit PUCCH/SRS/PUSCH per CC (carrier component) per BWP. From this capability, the terminal with limited capability can report 1 active spatial relationship, that is, 1 active transmission beam. Therefore, such terminals do not want to support too dynamic (DCI-level) transmit beam switching, and such terminals do not want to track multiple beams simultaneously; in the 3GPP protocol, CC may also be a Cell (Cell).

7. When maxnumber active spatial relationships of the terminal is 1, an additional active spatial relationships dedicated to uplink control, that is, an additional beam for transmitting an uplink control channel (e.g., PUCCH), is supported. The definition in the NR protocol is as follows:

additionalActiveSpatialRelationPUCCH

Indicates support of one additional active spatial relations forPUCCH,which is mandatory.

the Chinese translation is as follows: the additional PUCCH activation spatial relationship refers to a PUCCH spatial relationship that supports one additional activation.

402: the base station issues the configuration information, and the terminal receives the configuration information issued by the base station.

The configuration information indicates that a transmission beam corresponding to a receiving beam of the aperiodic CSI-RS of the terminal is configured as a transmission beam of the uplink data channel. In the NR protocol, RRC and MAC-CE configure a transmitting beam corresponding to a receiving beam of the aperiodic CSI-RS as a transmitting beam of an uplink sounding signal SRS and activate the transmitting beam, and the DCI instructs the terminal to use the transmitting beam of the SRS as a transmitting beam of an uplink data channel.

Specifically, the content of the base station configuration includes:

the contents configured by RRC (radio resource control) include:

1, spatial relationship of SRS resources, that is, SRS transmission beams, each SRS resource can be configured with a transmission beam, wherein at least one SRS transmission beam reference signal is an aperiodic CSI-RS; that is, the receiving beam of the AP CSI-RS is configured as the transmitting beam of the SRS.

2, trigger state of aperiodic CSI-RS

The contents of the MAC-CE activation include:

1, SRS resource activation, wherein at least one SRS transmission beam reference signal is an aperiodic CSI-RS.

403: and the base station dynamically changes the receiving beam of the aperiodic CSI-RS through the DCI.

Similar to 203, the base station informs the terminal device that the receiving beam of the aperiodic CSI-RS is changed by assuming that the DCI dynamically indicates the QC L of the aperiodic CSI-RS, that is, indicating the receiving beam of the aperiodic CSI-RS, and the DCI sent by the base station (usually, the CSI request field) has a trigger state of a selected aperiodic CSI-RS.

And after receiving the DCI, the terminal receives the CSI-RS by adopting a transmission beam corresponding to the changed receiving beam (namely, the hypothesis of QC L).

Before 403, the base station and the terminal can perform normal communication, and the application does not pay attention to the communication.

404: and the base station sends the CSI-RS, and the terminal measures the CSI-RS and reports the measurement result.

Similar to 204, the terminal determines the changed receiving beam of the aperiodic CSI-RS according to the instruction of 403, receives the CSI-RS sent by the base station through the beam, and reports the measurement result (CSI), further, the terminal may re-determine the receiving beam according to the measurement result (i.e., the QC L assumption), and the base station may also re-determine the receiving beam of the terminal according to the reported measurement result, or determine that the original receiving beam is still used according to the measurement result.

This step is optional.

405: the base station sends DCI to schedule the PUSCH, the terminal sends the PUSCH, and the base station receives the PUSCH.

In an application scenario of the present application, the DCI further instructs the terminal to use the SRS transmission beam as the uplink data channel PUSCH transmission beam. The transmission beam reference signal of the SRS indicated by the SRI field in the DCI is the aperiodic CSI-RS in step 403/404.

If 405 is performed directly after 403, since the reception beam of the aperiodic CSI-RS (i.e., the QC L assumption) has changed in 403, the transmission beam of the PUSCH should be changed accordingly, and the terminal receives the PUSCH using the transmission beam corresponding to the reception beam of the aperiodic CSI-RS (i.e., the QC L assumption) indicated by 403.

Optionally, if step 404 occurs before step 405, the terminal uses the transmission beam assumed (i.e., the reception beam) by QC L determined in step 404 to transmit pusch because aperiodic CSI-RS measurement may be used for reception beam training, and thus the optimal reception beam of the aperiodic CSI-RS may have been updated in step 404, and of course the optimal beam may not be changed.

The DCI in 405 and 403 should generally be different DCI.

And 406, the base station dynamically changes the receiving beam of the aperiodic CSI-RS through the DCI again (i.e. instructs the terminal to change the QC L hypothesis through sending down the DCI), and the manner of the indication is similar to that of 403, which can refer to the description of 403.

Referring to fig. 2, the time interval between steps 403 and 406 is the time interval from the DCI indication to the aperiodic CSI-RS (AP CSI-RS) transmission, that is, the capability reported by the terminal in 401 is 3.

The time interval between two indications (i.e. DCI in 403 and DCI in 406) issued by the base station to change the receive beam of the aperiodic CSI-RS is greater than or equal to the preset time interval, i.e. the time interval between 403 and 406 is not less than the preset time interval; wherein the two DCIs respectively indicate different receiving beams of the same aperiodic CSI-RS for the terminal.

X, if base station configured, may be embodied in step 402; that is, X is added to the configuration information to limit the time interval between two DCIs not less than X.

If X is the terminal capability, it should also be embodied in step 401, that is, in step 401, the terminal reporting capability includes X, which is used to limit the time interval between two DCI orders to be not less than X.

For example, in step 401, the capabilities reported by the terminal include 3 and 4, and the value of X may be 3 or 3+4, that is, the time interval between two issuance of the QC L instruction issued by the base station to change the aperiodic CSI-RS is greater than or equal to the a-CSI-RS Beam switching timing, or greater than or equal to the a-CSI-RS Beam switching timing + Beam reporting timing.

If the time interval between two DCIs issued by the base station is smaller than X, and the terminal determines that the time interval between steps 403 and 406 is smaller than X after receiving the second DCI (the DCI in step 406), the terminal abandons the use of the transmission beam corresponding to the reception beam indicated by step 406 to transmit the PUSCH, that is, the subsequent terminal still transmits the PUSCH according to the transmission beam corresponding to the QC L hypothesis (the reception beam) indicated by 403 or 404, or the terminal may transmit the PUSCH by using the transmission beam corresponding to the latest indication (the DCI indication other than 406) or the used reception beam (or the QC L hypothesis), or the terminal may transmit the PUSCH by using the transmission beam indicated or used last time, for example, the transmission beam used before 403 to communicate with the base station, and the communication contents include receiving the PDSCH, receiving the PDCCH, transmitting the PUSCH, transmitting the PUCCH, and the like.

404, 405, 406 have no chronological order, 404 being optional. The step after 406 is repeated 404 and 405 until the terminal sends the PUSCH.

407: and the base station sends the CSI-RS, and the terminal measures and reports the measurement result.

408: the base station sends DCI to schedule the PUSCH, the terminal sends the PUSCH, and the base station receives the PUSCH.

407-408 are repeated 404-405.

The above embodiment is similar to the embodiment of fig. 3 in some steps, and reference may be made to the description of the embodiment of fig. 3.

Therefore, in the above embodiment, if the condition that the time interval between the steps 403 and 406 is not less than X (i.e., the minimum time interval between the base station issuing the instructions for changing the reception beam of the aperiodic CSI-RS twice) is satisfied, the terminal assumes the corresponding transmission beam to transmit the PUSCH according to QC L indicated by 406, and if not, the terminal abandons the QC L assumption of step 406, and still assumes the corresponding transmission beam according to QC L indicated in 403 or 404, or transmits the PUSCH using the last instructed or used transmission beam, thereby avoiding the terminal beam switching failure and failing to normally communicate with the base station.

In the above embodiment, a time interval X is set, the base station is instructed to issue the minimum time interval between instructions for changing the receive beam of the aperiodic CSI-RS twice, the time intervals of the two DCI times are compared with X, and different processing manners are adopted for comparison results; in another embodiment, another time interval Y may be set, and referring to fig. 6, another beam indication method embodiment is as follows:

501: and terminal capability feedback.

Like 401, reference may be made to 401.

502: and the base station issues the configuration, and the terminal receives the configuration of the base station.

As in 402.

503: and the base station dynamically changes the receiving beam of the aperiodic CSI-RS through the DCI.

As in 403.

Before 503, the base station and the terminal can perform normal communication, and the application does not pay attention to the communication.

504: and the base station sends the CSI-RS, and the terminal measures and reports the measurement result.

This step is optional, the same as 404.

505: the base station sends DCI to schedule the PUSCH, the terminal sends the PUSCH, and the base station receives the PUSCH.

In an application scenario of the present application, the DCI further instructs the terminal to use the SRS transmission beam as the uplink data channel PUSCH transmission beam. The transmission beam reference signal of the SRS indicated by the SRI field in the DCI is the aperiodic CSI-RS in step 503/504.

The DCI in 503 and 505 are typically different DCIs.

Although the QC L of the aperiodic CSI-RS assumes that (i.e., the reception beam) has changed in 503, since the CSI-RS may not have been transmitted, the terminal has not measured the aperiodic CSI-RS for the latest time, and a new best reception beam has not been determined, the terminal may not change the transmission beam for transmitting the PUSCH.

The present embodiment introduces time period Y, and similar to Y in 305, within DCI start Y time (including Y end time point), the terminal abandons the transmission of PUSCH using the transmission beam corresponding to the reception beam indicated by DCI in 503, and the terminal may use QC L indicated or used last time before 503 to assume the transmission beam (the transmission beam indicated or used last time) corresponding to the (reception beam) to transmit PUSCH, referring to the description of the previous embodiment, the DCI issue time point in 503 is the start time of Y.

After Y time, the terminal transmits PUSCH using the transmission beam assumed (reception beam) by QC L indicated by DCI in 503.

Y may be embodied in step 502 if it is base station configured; that is, Y is added to the configuration information to instruct the base station to issue an instruction for changing the receiving beam of the aperiodic CSI-RS to a time interval at which the terminal transmits the uplink data channel by applying the transmitting beam corresponding to the receiving beam.

If Y is the terminal capability, it should also be embodied in step 501, that is, in step 501, the terminal reporting capability includes Y, which is used to instruct the base station that the terminal can support to issue an instruction for changing the receiving beam of the aperiodic CSI-RS to a time interval at which the terminal applies the transmitting beam corresponding to the receiving beam to transmit the uplink data channel.

Y may be a newly added terminal capability, and is used for the terminal to instruct the base station that the terminal can support to issue an instruction for changing a receiving beam of the aperiodic CSI-RS to a time interval at which the terminal applies a transmitting beam corresponding to the receiving beam to transmit an uplink data channel. Or may be the same as Y in 305.

Y may also reuse the value of the existing terminal capability, for example, in step 501, the capability reported by the terminal includes 3 and 4, and the value of Y may be 3 or 3+ 4. That is, the Y time after the base station issues the DCI for changing the aperiodic CSI-RS is greater than or equal to the a-CSI-RS Beam switching timing, or greater than or equal to the a-CSI-RS Beam switching timing + Beam reporting timing.

Therefore, whether the terminal transmits PUSCH with the QC L indicated in 503 assuming the corresponding transmission beam depends on the time interval between DCI in 503 and PUSCH transmission in 505.

504, 505, 506 have no chronological order, 504 being optional. The step following 505 is to repeat 503-505.

The base station changes the QC L indication of the aperiodic CSI-RS dynamically again through DCI 506.

Step 503 is repeated.

507: and the base station sends the CSI-RS, and the terminal measures and reports.

Step 504 is repeated.

508: the base station sends DCI to schedule the PUSCH, the terminal sends the PUSCH, and the base station receives the PUSCH.

And repeating 505.

The DCI in 506 and 508 are typically different DCIs.

The above embodiment is similar to the embodiment of fig. 4 in some steps, and reference may be made to the description of the embodiment of fig. 4.

According to the method described in 505, whether the terminal transmits PUSCH with QC L indicated in 506 assuming the corresponding transmission beam depends on the time interval between DCI in 506 and PUSCH transmission in 508.

Therefore, in the embodiment, after Y time after the aperiodic CSI-RS DCI trigger, the terminal uses the transmission beam corresponding to QC L indicated by DCItrigger to transmit the PUSCH, the aperiodic CSI-RS DCI trigger issued by the base station is abandoned within the Y time, and the PUSCH is transmitted by using the last indicated or used transmission beam, where the DCI trigger refers to the DCI trigger that changes the QC L hypothesis (receiving beam) of the AP CSI-RS, so that failure in switching the terminal beam is avoided, and normal communication between the terminal and the base station is ensured.

Based on the method of the above embodiment, the communication apparatus provided by the present application will be described below.

Fig. 7 shows a schematic structural diagram of a communication device provided in the present application, where the communication device 600 includes: a communication unit 610 and a processing unit 620.

A communication unit 610, configured to perform transceiving operations of signals in the foregoing method embodiments, that is, implement a communication function.

The processing unit 620 is configured to perform other operations besides signal transceiving, determine a time interval and determine a preset time period in the above method embodiment.

Optionally, the communication unit 610 is also referred to as a transceiver unit (or module), and may include a receiving unit (module) and/or a transmitting unit (module) for performing the steps of receiving and transmitting in the method embodiments and the terminal device in fig. 3 to 6, respectively. Optionally, the communication device 600 may further include a storage unit for storing instructions executed by the communication unit 610 and the processing unit 620.

For example: in the method illustrated in fig. 3, when the communication device 600 is a terminal device, the method includes:

a receiving module: the device comprises a receiving unit, a configuration unit and a processing unit, wherein the receiving unit is used for receiving configuration information issued by network equipment, and the configuration information indicates that a receiving beam of a non-periodic channel state information reference signal CSI-RS is used as a receiving beam of a data channel; receiving first Downlink Control Information (DCI) issued by network equipment, wherein the first DCI is used for indicating a receiving beam of an aperiodic CSI-RS; receiving second DCI issued by the network equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

a processing module: if the time interval between the first DCI and the second DCI is not less than the aperiodic CSI-RS beam switching time of the terminal equipment, the receiving module is used for indicating the receiving module to receive the data channel issued by the network equipment by using the receiving beam indicated by the second DCI; or if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time of the terminal equipment, the terminal equipment is used for abandoning the receiving beam indicated by the second DCI.

Further, the receiving module is further configured to: and receiving the data channel issued by the network equipment by using the receiving beam indicated by the first DCI, or receiving the data channel issued by the network equipment by using the receiving beam used last time.

For example: in the method illustrated in fig. 4, when the communication apparatus 600 is a terminal device, the method includes: the method comprises the following steps:

a receiving module: the device comprises a receiving unit, a configuration unit and a processing unit, wherein the receiving unit is used for receiving configuration information issued by network equipment, and the configuration information indicates that a receiving beam of a non-periodic channel state information reference signal CSI-RS is used as a data channel receiving beam; receiving downlink control information DCI issued by network equipment, wherein the DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

a processing module: within a preset time period after the DCI starts, the receiving module is used for indicating to receive a data channel issued by the network equipment by using a receiving beam used last time before the DCI; or after a preset time period after the DCI starts, the DCI is used to instruct a receiving module to receive a data channel sent by the network device using a receiving beam indicated by the DCI;

and the preset time period is not less than the aperiodic CSI-RS wave beam switching time of the terminal equipment.

For example: in the method illustrated in fig. 5, when the communication device 600 is a terminal device, the method includes:

a receiving module: the device comprises a configuration information module, a data transmission module and a data transmission module, wherein the configuration information module is used for receiving configuration information issued by network equipment, and the configuration information indicates that a transmission beam corresponding to a receiving beam of a non-periodic channel state information reference signal (CSI-RS) is used as a transmission beam of an uplink data channel; receiving first Downlink Control Information (DCI) issued by network equipment, wherein the first DCI is used for indicating a receiving beam of an aperiodic CSI-RS; receiving second DCI issued by the network equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

a sending module: if the time interval between the first DCI and the second DCI is not less than the aperiodic CSI-RS beam switching time of the terminal equipment, the method is used for sending an uplink data channel to the network equipment by using a sending beam corresponding to a receiving beam indicated by the second DCI; or if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time of the terminal device, the ue is configured to abandon the transmission beam corresponding to the reception beam indicated by the second DCI.

Further, the sending module is further configured to: and transmitting the uplink data channel to the network equipment by using the transmission beam corresponding to the receiving beam indicated by the first DCI, or transmitting the uplink data channel to the network equipment by using the transmission beam used last time.

For example: in the method illustrated in fig. 6, when the communication device 600 is a terminal device, the method includes:

a receiving module: the device comprises a configuration information module, a data transmission module and a data transmission module, wherein the configuration information module is used for receiving configuration information issued by network equipment, and the configuration information indicates that a transmission beam corresponding to a receiving beam of a non-periodic channel state information reference signal (CSI-RS) is used as a transmission beam of an uplink data channel; receiving downlink control information DCI issued by network equipment, wherein the DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

a sending module: within a preset time period after the DCI starts, the method is used for transmitting an uplink data channel to network equipment by using a transmission beam used last time before the DCI; or after a preset time period after the DCI starts, the DCI is configured to send an uplink data channel to a network device using a sending beam corresponding to a receiving beam indicated by the DCI;

Communication apparatus 600 is a terminal device, and may be a chip in the terminal device. When the communication device is a terminal equipment, the processing unit may be a processor and the communication unit may be a transceiver. The communication device may further comprise a storage unit, which may be a memory. The storage unit is used for storing instructions, and the processing unit executes the instructions stored by the storage unit so as to enable the communication equipment to execute the method. When the communication device is a chip within a terminal equipment, the processing unit may be a processor, and the communication unit may be an input/output interface, a pin, a circuit, or the like; the processing unit executes the instructions stored in the storage unit (e.g., register, cache memory, etc.), or the storage unit (e.g., read-only memory, random access memory, etc.) in the terminal device, which is located outside the chip, to make the communication device perform the operations performed by the terminal device in the above-mentioned method embodiments

It can be clearly understood by those skilled in the art that, when the steps performed by the communication apparatus 600 and the corresponding beneficial effects can refer to the related description of the terminal device in the foregoing method embodiment, for brevity, no further description is provided herein.

It is to be understood that the communication unit 610 may be implemented by a transceiver and the processing unit 620 may be implemented by a processor. The storage unit may be implemented by a memory. As shown in fig. 8, the communication device 700 may include a processor 710, a memory 720, and a transceiver 730.

The communication apparatus 600 shown in fig. 7 or the communication apparatus 700 shown in fig. 8 can implement the foregoing embodiments and the steps performed by the terminal device in fig. 3-6, and similar descriptions can refer to the descriptions in the foregoing corresponding methods. To avoid repetition, further description is omitted here.

Fig. 9 shows a schematic structural diagram of a communication device 800 provided in the present application, where the communication device 800 includes a processing unit 810 and a communication unit 820.

The processing unit 810 is configured to perform transceiving operations of signals in the foregoing method embodiments, that is, implement a communication function.

A communication unit 820, configured to perform other operations besides signal transceiving in the above method embodiments, such as determining a time interval and a preset time period.

Optionally, the communication unit 820 may be referred to as a transceiver unit (or module) and includes a receiving unit (module) and/or a transmitting unit (module) for performing the steps of receiving and transmitting by the network device in fig. 3 to 6 and the method embodiments, respectively. Optionally, the communication device 800 may further include a storage unit for storing instructions executed by the communication unit 820 and the processing unit 810.

For example: in the method illustrated in fig. 3, when the communication device 600 is a network device, the method includes:

a sending module: the terminal equipment is used for sending configuration information to the terminal equipment, wherein the configuration information indicates that a receiving beam of an aperiodic channel state information reference signal (CSI-RS) is used as a receiving beam of a data channel; first downlink control information DCI issued to a terminal device, the first DCI being used for indicating a receiving beam of an aperiodic CSI-RS; and a second DCI issued to the terminal device, the second DCI being used for indicating a receiving beam of the aperiodic CSI-RS; wherein:

and the time interval between the first DCI and the second DCI is not less than the aperiodic CSI-RS beam switching time of the terminal equipment.

For example: in the method illustrated in fig. 5, when the communication device 600 is a network device, the method includes:

a sending module: the device comprises a configuration information sending unit, a configuration information receiving unit and a configuration information sending unit, wherein the configuration information sending unit is used for sending configuration information to a terminal device, and the configuration information indicates that a sending beam corresponding to a receiving beam of an aperiodic channel state information reference signal (CSI-RS) is used as a sending beam of an uplink data channel; first downlink control information DCI issued to a terminal device, the first DCI being used for indicating a receiving beam of an aperiodic CSI-RS; and a second DCI issued to the terminal device, the second DCI being used for indicating a receiving beam of the aperiodic CSI-RS; wherein:

In the embodiments of the foregoing apparatuses, the determination of the time interval and the preset time period may be performed by a processing module, and the sending module or the receiving module may perform corresponding operations according to a processing result of the processing module.

The apparatus 800 is a network device in the method embodiment, and may also be a chip within the network device. When the apparatus is a network device, the processing unit may be a processor and the communication unit may be a transceiver. The apparatus may further comprise a storage unit, which may be a memory. The storage unit is used for storing instructions, and the processing unit executes the instructions stored by the storage unit so as to enable the communication equipment to execute the method. When the apparatus is a chip within a network device, the processing unit may be a processor, the communication unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes instructions stored in a storage unit (e.g., a register, a cache, etc.) inside the chip or a storage unit (e.g., a read-only memory, a random access memory, etc.) outside the chip, so as to cause the communication device to perform the operations performed by the network device in the above method embodiments.

It is clear to those skilled in the art that, when the steps performed by the apparatus 800 and the corresponding advantages are described in the foregoing description of the network device in the method embodiment, for brevity, no further description is provided herein.

It is to be understood that the communication unit 820 may be implemented by a transceiver and the processing unit 810 may be implemented by a processor. The storage unit may be implemented by a memory. As shown in fig. 10, the communication device 900 may include a processor 910, a memory 920, and a transceiver 930.

The communication apparatus 800 shown in fig. 9 or the communication apparatus 900 shown in fig. 10 can implement the foregoing method embodiments and the steps performed by the network device in fig. 3-6, and similar descriptions can refer to the descriptions in the foregoing corresponding methods. To avoid repetition, further description is omitted here.

The network device in each of the above device embodiments corresponds to the terminal device or the terminal device in the terminal device and method embodiments, and the corresponding module or unit executes the corresponding steps. For example, the method of the communication unit (or transceiver unit, transceiver) performs the steps of transmitting and/or receiving in the method embodiment (or performed by the transmitting unit, the receiving unit, respectively), and the steps other than transmitting and receiving may be performed by the processing unit (processor). The functions of the specific elements may be referred to in the respective method embodiments. The sending unit and the receiving unit can form a transceiving unit, and the transmitter and the receiver can form a transceiver, so that transceiving functions in the method embodiment are realized together; the processor may be one or more.

It should be understood that the above division of the units is only a functional division, and other division methods may be possible in actual implementation.

The communication apparatus in each of the above embodiments may also be a chip or a functional unit in a terminal device or a network device, and the processing unit may be implemented by hardware or software. When implemented in hardware, the processing unit may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processing unit may be a general-purpose processor implemented by reading software code stored in a memory unit, which may be integrated in the processor or may be located separately from the processor.

Fig. 11 is a schematic structural diagram of a terminal device 1000 according to the present application. For convenience of explanation, fig. 11 shows only main components of the terminal device. As shown in fig. 11, the terminal apparatus 1000 includes a processor, a memory, a control circuit, an antenna, and an input-output device. The terminal device 1000 can be applied to a system as shown in fig. 1, and performs the functions of the terminal device in the above method embodiment.

The processor is mainly configured to process the communication protocol and the communication data, control the entire terminal device, execute a software program, process data of the software program, and control the terminal device to perform the actions described in the above method embodiments. The memory is used primarily for storing software programs and data. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 11 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this application.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal device, execute a software program, and process data of the software program. The processor in fig. 11 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

For example, in the embodiment of fig. 11, the antenna and the control circuit with transceiving functions can be regarded as the transceiving unit 1001 of the terminal device 1000, and the processor with processing functions can be regarded as the processing unit 1002 of the terminal device 1000. As shown in fig. 11, the terminal device 1000 includes a transceiving unit 1001 and a processing unit 1002. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the transceiving unit 1001 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 1001 may be regarded as a transmitting unit, that is, the transceiving unit 1001 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc.

The terminal device 1000 shown in fig. 11 is capable of implementing various processes involving the terminal device in the method embodiments of fig. 3-6. The operations and/or functions of the modules in the terminal device 1000 are respectively for implementing the corresponding flows in the above method embodiments. Specifically, reference may be made to the description of the above method embodiments, and the detailed description is appropriately omitted herein to avoid redundancy.

Fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application, which may be a schematic structural diagram of a network device. As shown in fig. 12, the network device 1100 may be applied to the system shown in fig. 1, and performs the functions of the network device in the above method embodiments.

The network can be applied to a communication system as shown in fig. 1, and performs the functions of the network device in the above method embodiment. The network device 1100 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 1110 and one or more baseband units (BBUs) (which may also be referred to as Digital Units (DUs)) 1120.

The RRU 1110 may be referred to as a transceiver unit, transceiver circuitry, or transceiver, etc., which may include at least one antenna 1111 and a radio frequency unit 1112. The RRU 1110 is mainly used for transceiving radio frequency signals and converting the radio frequency signals and baseband signals, for example, for sending indication information in the above method embodiments. The RRU 1110 and the BBU1120 may be physically disposed together or may be physically disposed separately, i.e., distributed base stations.

The BBU1120 is a control center of the base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing unit) 1120 can be used to control a network device to execute the operation flow of the above method embodiment with respect to the network device.

In an embodiment, the BBU1120 may be formed by one or more boards, where the boards may jointly support a radio access network (e.g., an NR network) with a single access indication, or may respectively support radio access networks with different access standards (e.g., L TE network, 5G network, or other networks), the BBU1120 further includes a memory 1121 and a processor 1122, where the memory 1121 is used to store necessary instructions and data, the processor 1122 is used to control the base station to perform necessary actions, e.g., to control the network device to execute the operation flow related to the network device in the foregoing method embodiments, the memory 1121 and the processor 1122 may serve one or more boards.

It should be appreciated that the network device 1100 shown in fig. 12 is capable of implementing various processes involving network devices in the method embodiments of fig. 3-6. The operations and/or functions of the respective modules in the network device 1100 are respectively configured to implement the corresponding flows in the above-described method embodiments. Specifically, reference may be made to the description of the above method embodiments, and the detailed description is appropriately omitted herein to avoid redundancy.

It should be noted that the communication unit in the embodiment of the present application may also be referred to as a transceiver unit or a transceiver module.

For example, the processing Device may be a Field-Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a System on Chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing Circuit (DSP), a Microcontroller (MCU), a Programmable L analog Device (P L D), or other integrated chips.

In implementation, the steps of the method provided by this embodiment may be implemented by hardware integrated logic circuits in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor 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 processor in the embodiments of the present application may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It is understood that the memory or storage units in the embodiments of the present application may be either volatile memory or non-volatile memory, or may include both volatile and non-volatile memory, wherein non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory volatile memory may be Random Access Memory (RAM), which serves as external cache memory, many forms of RAM are available, such as Static RAM (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate, DDR, SDRAM), Synchronous Dynamic Random Access Memory (SDRAM), or synchronous DRAM, or any other types of RAM intended to be suitable for direct access systems such as DRAM, DR, SDRAM, or SDRAM, including, SDRAM, and SDRAM and RAM.

The embodiment of the present application further provides a communication system, which includes a sending end device and a receiving end device. For example, the sending end device is the network device in the above embodiment, and the receiving end device is the terminal device in the above embodiment; or, the sending end device is the terminal device in the above embodiment, and the receiving end device is the network device in the above embodiment.

The embodiments of the present application also provide a computer-readable medium, on which a computer program is stored, and the computer program, when executed by a computer or a processor, implements the method in any of the above embodiments.

The embodiments of the present application also provide a computer program product, which when executed by a computer or a processor implements the method in any of the above embodiments.

An embodiment of the present application further provides a system chip, where the system chip includes: a processing unit and a communication unit. The processing unit may be, for example, a processor. The communication unit may be, for example, an input/output interface, a pin or a circuit, etc. The processing unit can execute computer instructions to cause a chip in the communication device to execute any one of the methods provided by the embodiments of the present application.

Optionally, the computer instructions are stored in a storage unit.

It should also be understood that references to "storing" in embodiments of the present application may refer to storing in one or more memories. The one or more memories may be provided separately or integrated in the encoder or decoder, the processor, or the communication device. The one or more memories may also be provided separately, with a portion of the one or more memories being integrated into the decoder, the processor, or the communication device. The type of memory may be any form of storage medium and is not intended to be limiting of the present application.

It should also be understood that the "protocol" in the embodiment of the present application may refer to a standard protocol in the communication field, and may include, for example, L TE protocol, NR protocol, and related protocols applied in future communication systems, which is not limited in the present application.

The computer instructions may be stored in, or transmitted from, a computer-readable storage medium to another computer-readable storage medium, e.g., a website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DS L)) or wireless (e.g., infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server, or data center via, e.g., a hard disk drive, a floppy disk drive, a solid state disk drive (DVD), a digital versatile disk drive, a digital video disk drive, a digital video disk.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Claims

1. A method for beam indication, comprising:

the method comprises the steps that terminal equipment receives configuration information issued by network equipment, wherein the configuration information indicates that a receiving wave beam of a non-periodic channel state information reference signal CSI-RS is used as a receiving wave beam of a data channel;

the terminal equipment receives first downlink control information DCI issued by the network equipment, wherein the first DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

the terminal equipment receives second DCI issued by the network equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

if the time interval between the first DCI and the second DCI is not less than the non-periodic CSI-RS beam switching time of the terminal equipment, the terminal equipment receives a data channel issued by the network equipment by using a receiving beam indicated by the second DCI; or if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time of the terminal equipment, the terminal equipment abandons the receiving beam indicated by the second DCI.

2. The method of claim 1, if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time of the terminal device, the method further comprising:

the terminal equipment receives the data channel issued by the network equipment by using the receiving beam indicated by the first DCI, or

And the terminal equipment receives the data channel transmitted by the network equipment by using the latest indication or the used receiving beam.

3.A method for beam indication, comprising:

the method comprises the steps that network equipment sends configuration information to terminal equipment, wherein the configuration information indicates that a receiving beam of an aperiodic channel state information reference signal (CSI-RS) is used as a receiving beam of a data channel;

the network equipment transmits first downlink control information DCI to the terminal equipment, wherein the first DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

the network equipment transmits second DCI to the terminal equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS; wherein:

the time interval between the first DCI and the second DCI is not less than the aperiodic CSI-RS beam switching time of the terminal equipment.

4. A method for beam indication, comprising:

the method comprises the steps that terminal equipment receives configuration information issued by network equipment, wherein the configuration information indicates that a receiving wave beam of a non-periodic channel state information reference signal CSI-RS is used as a data channel receiving wave beam;

the terminal equipment receives downlink control information DCI issued by the network equipment, wherein the DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

in a preset time period after the DCI starts, the terminal equipment receives a data channel issued by the network equipment by using a receiving beam indicated or used last time before the DCI; or

After a preset time period after the DCI starts, the terminal equipment receives a data channel issued by the network equipment by using a receiving beam indicated by the DCI;

5. A method for beam indication, comprising:

the method comprises the steps that terminal equipment receives configuration information issued by network equipment, wherein the configuration information indicates that a sending beam corresponding to a receiving beam of a non-periodic channel state information reference signal (CSI-RS) is used as a sending beam of an uplink data channel;

if the time interval between the first DCI and the second DCI is not less than the aperiodic CSI-RS beam switching time of the terminal equipment, the terminal equipment uses the transmission beam corresponding to the receiving beam indicated by the second DCI to transmit an uplink data channel to the network equipment; or

And if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time of the terminal equipment, the terminal equipment abandons the transmission beam corresponding to the receiving beam indicated by the second DCI.

6. The method of claim 5, if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time of the terminal device, the method further comprising:

the terminal device uses the transmission beam corresponding to the reception beam indicated by the first DCI to transmit an uplink data channel to the network device, or

And the terminal equipment transmits an uplink data channel to the network equipment by using the latest indication or the used transmission beam.

7. A method for beam indication, comprising:

the method comprises the steps that network equipment sends configuration information to terminal equipment, wherein the configuration information indicates that a sending beam corresponding to a receiving beam of an aperiodic channel state information reference signal (CSI-RS) is used as a sending beam of an uplink data channel;

8. A method for beam indication, comprising:

in a preset time period after the DCI starts, the terminal equipment transmits an uplink data channel to the network equipment by using a last indication or used transmission beam before the DCI; or

After a preset time period after the DCI starts, the terminal equipment uses a sending beam corresponding to a receiving beam indicated by the DCI to send an uplink data channel to the network equipment;

9. A communications apparatus, comprising:

a receiving module: the device comprises a receiving unit, a configuration unit and a processing unit, wherein the receiving unit is used for receiving configuration information issued by network equipment, and the configuration information indicates that a receiving beam of a non-periodic channel state information reference signal CSI-RS is used as a receiving beam of a data channel; receiving first Downlink Control Information (DCI) issued by the network equipment, wherein the first DCI is used for indicating a receiving beam of the aperiodic CSI-RS; receiving second DCI issued by the network equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

a processing module: if the time interval between the first DCI and the second DCI is not less than the aperiodic CSI-RS beam switching time of the communication device, the receiving module is configured to instruct the receiving module to receive the data channel sent by the network device using the receiving beam indicated by the second DCI; or

And if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time of the communication device, the receiving beam indicated by the second DCI is abandoned.

10. The communication device of claim 9, wherein if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time of the communication device, the receive module is further to:

receiving a data channel transmitted by the network equipment by using the receiving beam indicated by the first DCI, or

And receiving the data channel transmitted by the network equipment by using the latest indication or the used receiving beam.

11. A communications apparatus, comprising:

a sending module: the terminal equipment is used for sending configuration information to the terminal equipment, wherein the configuration information indicates that a receiving beam of an aperiodic channel state information reference signal (CSI-RS) is used as a receiving beam of a data channel; first downlink control information DCI issued to the terminal device, the first DCI being used for indicating a receiving beam of the aperiodic CSI-RS; and a second DCI issued to the terminal device, the second DCI being used for indicating a reception beam of the aperiodic CSI-RS; wherein:

12. A communications apparatus, comprising:

a receiving module: the device comprises a receiving unit, a configuration unit and a processing unit, wherein the receiving unit is used for receiving configuration information issued by network equipment, and the configuration information indicates that a receiving beam of a non-periodic channel state information reference signal CSI-RS is used as a data channel receiving beam; receiving downlink control information DCI issued by the network equipment, wherein the DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

a processing module: within a preset time period after the DCI starts, the receiving module is configured to instruct the receiving module to receive a data channel sent by the network device using a last indication or a used receiving beam before the DCI; or

After a preset time period after the DCI starts, the receiving module is configured to receive a data channel sent by the network device using a receiving beam indicated by the DCI;

wherein the preset time period is not less than the aperiodic CSI-RS beam switching time of the communication device.

13. A communications apparatus, comprising:

a receiving module: the device comprises a configuration information module, a data transmission module and a data transmission module, wherein the configuration information module is used for receiving configuration information issued by network equipment, and the configuration information indicates that a transmission beam corresponding to a receiving beam of a non-periodic channel state information reference signal (CSI-RS) is used as a transmission beam of an uplink data channel; receiving first Downlink Control Information (DCI) issued by the network equipment, wherein the first DCI is used for indicating a receiving beam of the aperiodic CSI-RS; receiving second DCI issued by the network equipment, wherein the second DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

a sending module: if the time interval between the first DCI and the second DCI is not less than the aperiodic CSI-RS beam switching time of the communication device, the method is used for transmitting an uplink data channel to the network equipment by using a transmission beam corresponding to the receiving beam indicated by the second DCI; or if the time interval between the first DCI and the second DCI is less than the aperiodic CSI-RS beam switching time of the communication apparatus, configured to abandon the transmission beam corresponding to the reception beam indicated by the second DCI.

14. The communication device of claim 13, the transmit module further to, if the time interval between the first DCI and the second DCI is less than an aperiodic CSI-RS beam switching time of the communication device:

transmitting an uplink data channel to the network device using a transmission beam corresponding to the reception beam indicated by the first DCI, or

And transmitting an uplink data channel to the network equipment by using the last indication or used transmission beam.

15. A communications apparatus, comprising:

a sending module: the device comprises a configuration information sending unit, a configuration information receiving unit and a configuration information sending unit, wherein the configuration information sending unit is used for sending configuration information to a terminal device, and the configuration information indicates that a sending beam corresponding to a receiving beam of an aperiodic channel state information reference signal (CSI-RS) is used as a sending beam of an uplink data channel; first downlink control information DCI issued to the terminal device, the first DCI being used for indicating a receiving beam of the aperiodic CSI-RS; and a second DCI issued to the terminal device, the second DCI being used for indicating a reception beam of the aperiodic CSI-RS; wherein:

16. A communications apparatus, comprising:

a receiving module: the device comprises a configuration information module, a data transmission module and a data transmission module, wherein the configuration information module is used for receiving configuration information issued by network equipment, and the configuration information indicates that a transmission beam corresponding to a receiving beam of a non-periodic channel state information reference signal (CSI-RS) is used as a transmission beam of an uplink data channel; receiving downlink control information DCI issued by the network equipment, wherein the DCI is used for indicating a receiving beam of the aperiodic CSI-RS;

a sending module: within a preset time period after the DCI starts, the DCI is configured to send an uplink data channel to the network device using a last indication or used sending beam before the DCI; or after a preset time period after the DCI starts, the DCI is configured to send an uplink data channel to the network device using a sending beam corresponding to the receiving beam indicated by the DCI;

17. A communications apparatus, the apparatus comprising:

a memory for storing a computer program;

a processor for invoking and executing a computer program stored in said memory to implement the method of any one of claims 1 to 8.

18. A computer storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a computer, implements the method of any one of claims 1 to 8.