CN115152174A

CN115152174A - Communication method and device

Info

Publication number: CN115152174A
Application number: CN202080097288.2A
Authority: CN
Inventors: 刘显达; 李雪茹
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2022-10-04
Also published as: WO2021164023A1

Abstract

The application discloses a communication method and a communication device, which are used for improving the transmission performance of data. Based on the application, the network device may configure the terminal device with a plurality of QCL parameters associated to the DMRS port of the first resource. Therefore, on the first resource, the terminal device may obtain an equivalent QCL parameter according to the plurality of QCL parameters, and the equivalent QCL parameter may accurately reflect the channel state, so as to perform channel estimation on the DMRS port according to the equivalent QCL parameter, and receive data according to the structure of the channel estimation, so as to improve the robustness of data reception on the first resource.

Description

Communication method and device

Technical Field

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

Background

Currently, a base station indicates, through signaling, a Transmission Control Indication (TCI) status (state) adopted by a currently scheduled data channel. Each TCI state includes a demodulation reference signal (DMRS) port and a quasi co-location (QCL relationship) between the reference signal ports. Based on the QCL relationship, the base station may indicate the QCL parameters to the terminal device for the terminal device to receive the DMRS. For example: the base station issues one or more reference signals in advance, the terminal equipment determines QCL parameters through one or more reference signal ports, and the terminal equipment receives DMRS port signals for data demodulation through the determined QCL parameters.

Currently, the receiving performance of DMRS needs to be improved. For example, in a high-speed mobile scenario such as a high-speed rail, since a channel has a large time-varying characteristic, and at the same time, there is a time delay in channel measurement, the reception success rate of the DMRS is reduced, and thus, data transmission performance is impaired.

Disclosure of Invention

The application provides a communication method and device for improving data transmission performance.

In a first aspect, the present application provides a method of communication. The method may be performed by a network device or a chip in a network device. The network device is a radio access network device such as a base station.

According to the method, the network device may determine (or obtain) and send the first information to the terminal device. Wherein the first information is for indicating a plurality of QCL parameters of the DMRS port on the first resource. The network device may also transmit the DMRS through the DMRS port.

With the above method, the network device may configure the terminal device with a plurality of QCL parameters associated to the DMRS port of the first resource. Therefore, on the first resource, the terminal device may obtain an equivalent QCL parameter according to the multiple QCL parameters, and the equivalent QCL parameter may accurately reflect the channel state, so as to perform channel estimation on the DMRS port according to the equivalent QCL parameter, and receive data according to the channel estimation structure, so as to improve the robustness of data reception on the first resource.

The plurality of QCL parameters of the above DMRS ports may include a plurality of first QCL parameters (e.g., parameters corresponding to QCL type a), or include a plurality of first QCL parameters and one or more second QCL parameters (e.g., parameters corresponding to QCL type D). Wherein the first QCL parameters include one or more of Doppler frequency offset, doppler spread, delay spread, or average delay. The second QCL parameters may include spatial reception parameters or spatial reception beamforming parameters.

In one possible example, the first information may include a TCI status information. The one TCI status information may be used to indicate a plurality of QCL parameters.

For example, the network device may further send second information to the terminal device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameters. The TCI state may include one or more TCI states, the QCL parameters may include one or more QCL parameters, and the correspondence between the TCI states and the QCL parameters may be that any of the one or more TCI states corresponds to one or more of the one or more QCL parameters. One of the TCI status information in the first information may be used to indicate one of the one or more TCI statuses indicated in the second information. For example, the second information is used to indicate correspondence between one or more TCI states and one or more QCL parameters, so that one TCI state and the QCL parameter corresponding to the TCI state can be determined according to the one TCI state information.

The network device may further send third information to the terminal device if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters. The third information is used to indicate a corresponding relationship between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device associates the first QCL parameters and the second QCL parameters, thereby performing channel estimation according to the associated QCL parameters.

Optionally, the protocol agrees on correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters. In addition, the first information may include a plurality of TCI status information, wherein one of the plurality of TCI status information indicates one of the plurality of first QCL parameters. Specifically, any one of the plurality of TCI status information may indicate one of the plurality of first QCL parameters, or each one of the plurality of TCI status information may indicate one of the plurality of first QCL parameters.

Furthermore, the first information may be specifically for indicating one or more first downlink reference signals associated with the plurality of first QCL parameters. Specifically, the one or more first downlink reference signals and the DMRS have the same first QCL parameters. In other words, the one or more first downlink reference signals and the DMRS are QCL under the first QCL parameter. Additionally, at least one of the one or more first downlink reference signals may also be associated with one or more second QCL parameters. Specifically, at least one of the one or more first downlink reference signals has the same second QCL parameter as the DMRS. In other words, at least one of the one or more first downlink reference signals, and the DMRS are QCL under the first QCL parameter. Alternatively, the first information may also indicate one or more second downlink reference signals, which may be associated with the one or more second QCL parameters. Specifically, the one or more second downlink reference signals and the DMRS have the same second QCL parameters, and thus the second QCL parameters may also be determined through the one or more second downlink reference signals. In other words, the one or more second downlink reference signals and the DMRS are QCL under the second QCL parameter.

Optionally, a DMRS receiving algorithm is determined according to the first information, or a minimum scheduling delay from the DCI to the PDSCH is determined according to the first information.

Optionally, a receiving algorithm of the first downlink reference signal is determined according to the first information.

In a second aspect, the present application provides a method of communication. The method may be performed by the terminal device or a chip in the terminal device.

According to the method, a terminal device may receive first information from a network device, the first information indicating a plurality of QCL parameters for DMRS ports on a first resource. The terminal device may receive the DMRS through the DMRS port according to the first information.

For example, the terminal device may further receive second information from the network device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameter. The TCI state may include one or more TCI states, the QCL parameters may include one or more QCL parameters, and the correspondence between the TCI states and the QCL parameters may be that any of the one or more TCI states corresponds to one or more of the one or more QCL parameters. One of the TCI status information in the first information may be used to indicate one of the one or more TCI statuses indicated in the second information.

The terminal device may also receive a signal from the network device if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters. The third information is used to indicate a corresponding relationship between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device associates the first QCL parameters and the second QCL parameters, thereby performing channel estimation according to the associated QCL parameters.

The first information may include a plurality of TCI status information if the plurality of QCL parameters includes a plurality of first QCL parameters, wherein one of the plurality of TCI status information may be used to indicate one of the plurality of first QCL parameters.

For the beneficial effects of the communication method in the second aspect, reference may be made to the description of the beneficial effects in the communication method in the first aspect, and details are not repeated here.

In a third aspect, an embodiment of the present application provides a communication method. The method may be performed by a network device or a chip in a network device. The network device is a radio access network device such as a base station.

According to the method, the network device may determine (or obtain) and send the first information to the terminal device. The first information may be used to indicate a plurality of QCL parameters for a plurality of sets of DMRS ports. Wherein each group of the plurality of groups of DMRS ports corresponds to one of the plurality of QCL parameters, and each group of DMRS ports comprises at least one DMRS port. The network device may also transmit a PDSCH with each port of the PDSCH corresponding to one of the DMRS ports in each group.

By adopting the method, the network equipment can configure a plurality of QCL parameters associated to a plurality of groups of DMRS ports to the terminal equipment, and the plurality of DMRS ports in each group of DMRS are commonly used for channel estimation of one PDSCH port. Therefore, the terminal equipment can obtain the channel estimation results of a plurality of DMRS ports according to a plurality of DMRS ports for one PDSCH port, and perform operations such as combination, averaging and the like according to the plurality of channel estimation results to be used for receiving the data layer of the PDSCH port, so as to improve the performance of channel estimation.

In one possible example, the first information may include one TCI status information, and the one TCI status information may be used to indicate the plurality of QCL parameters.

For example, the network device may further transmit second information indicating a correspondence between the TCI status and the QCL parameters. The TCI state may include one or more TCI states, the QCL parameters may include one or more QCL parameters, and the correspondence between the TCI states and the QCL parameters may be that any of the one or more TCI states corresponds to one or more of the one or more QCL parameters. One of the TCI status information in the first information may be used to indicate one of the one or more TCI statuses indicated in the second information.

The network device may further send third information to the terminal device if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters. The third information may be used to indicate a correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device associates the first QCL and the second QCL parameters, and performs channel estimation according to the associated QCL parameters.

In addition, if the first information includes a plurality of TCI status information, one of the plurality of TCI status information may be used to indicate one of the plurality of first QCL parameters.

In addition, the first information may be specifically used for indicating a plurality of first downlink reference signals associated with the plurality of first QCL parameters. Specifically, the plurality of first downlink reference signals and the DMRS have the same first QCL parameter. Alternatively, the plurality of first downlink reference signals and DMRS are QCL under the first QCL parameter. Additionally, at least one of the plurality of first downlink reference signals may also be associated with one or more second QCL parameters. Specifically, at least one of the plurality of first downlink reference signals has the same second QCL parameter as the DMRS. In other words, at least one of the plurality of first downlink reference signals, and the DMRS are QCL under the first QCL parameter. Alternatively, the first information may also indicate one or more second downlink reference signals, which may be associated with the one or more second QCL parameters. Specifically, the one or more second downlink reference signals and the DMRS have the same second QCL parameters, and thus the second QCL parameters may also be determined through the one or more second downlink reference signals. In other words, the one or more second downlink reference signals and the DMRS are QCL under the second QCL parameter.

In a fourth aspect, the present application provides a method of communication. The method may be performed by the terminal device or a chip in the terminal device.

According to the method, the terminal device may receive first information from the network device. The first information may be used to indicate a plurality of QCL parameters for a plurality of sets of DMRS ports. Wherein each group of the plurality of groups of DMRS ports corresponds to one of the plurality of QCL parameters, and each group of DMRS ports includes at least one DMRS port. The aware device may also receive a PDSCH, each port of which corresponds to one of each set of DMRS ports.

For example, the terminal device may receive second information from the network device, where the second information is used to indicate a correspondence between the TCI status and the QCL parameter. The TCI state may include one or more TCI states, the QCL parameters may include one or more QCL parameters, and the correspondence between the TCI states and the QCL parameters may be that any of the one or more TCI states corresponds to one or more of the one or more QCL parameters. One of the TCI status information in the first information may be used to indicate one of the one or more TCI statuses indicated in the second information.

The terminal device may receive third information from the network device if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters. The third information may be used to indicate a correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device associates the first QCL and the second QCL parameters, and performs channel estimation according to the associated QCL parameters.

In addition, the first information may be specifically used for indicating a plurality of first downlink reference signals associated with the plurality of first QCL parameters. Specifically, the plurality of first downlink reference signals and the DMRS have the same first QCL parameter. In other words, the plurality of first downlink reference signals and DMRS are QCL under the first QCL parameter. Additionally, the at least one of the plurality of first downlink reference signals may also be associated with one or more second QCL parameters. Specifically, at least one of the plurality of first downlink reference signals has the same second QCL parameter as the DMRS. In other words, at least one of the plurality of first downlink reference signals, and the DMRS are QCL under the first QCL parameter. Alternatively, the first information may also indicate one or more second downlink reference signals, which may be associated with the one or more second QCL parameters. Specifically, the one or more second downlink reference signals and the DMRS have the same second QCL parameter, and therefore, the second QCL parameter may also be provided through the one or more second downlink reference signals. In other words, the one or more second downlink reference signals and the DMRS are QCL under the second QCL parameter.

The advantageous effects of the communication method in the fourth aspect above may refer to the description of the advantageous effects in the communication method in the third aspect, and are not described herein again.

In a fifth aspect, the present application provides a communication device. The communication device may be adapted to carry out the functions referred to in the first aspect or any one of the possible designs of the first aspect. The functionality may be implemented by hardware, or by hardware executing corresponding software, which comprises one or more modules corresponding to the functions or method steps or operations in the first aspect and any design thereof. Specifically, the communication device may be a terminal device or a chip in the terminal device.

In one possible example, the communication device may include a communication module (or communication unit) and a processing module (or processing unit). The communication module can be used for the communication device to carry out communication, and the processing module can be used for the communication device to realize the processing function of the communication device.

In performing the method of the first aspect, the processing module may be configured to determine the first information. Wherein the first information is for indicating a plurality of QCL parameters of the DMRS port on the first resource. The communication module may be configured to send the first information to the terminal device. The communications module may also be configured to transmit the DMRS through the DMRS port. The above first information may be implemented by referring to the description about the first information in the first aspect.

For example, the communication module may be further configured to send second information to the terminal device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameters. The second information may be implemented as described with reference to the second information in the first aspect.

In addition, if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters, the communication module may be further configured to transmit third information to the terminal device. The third information may be implemented as described with reference to the third information in the first aspect.

In another possible example, the communication device may include a processor (or processing chip, processing circuit) and a transceiver (or communication circuit). The processor may be configured to invoke program instructions to perform processing functions of the communication device. The communication module can be used for the communication device to communicate. Wherein the program instructions may be stored in a memory, which may be part of the communication device, the communication device may further comprise a memory; alternatively, the memory may be connected to the processor and/or transceiver in a manner external to the communication device.

In performing the method of the first aspect, the processor may be configured to determine the first information. Wherein the first information is used to indicate a plurality of QCL parameters of DMRS ports on the first resource. The transceiver may be operable to transmit the first information to the terminal device. The transceiver may also be used to transmit the DMRS through the DMRS port. The above implementation of the first information may refer to the description about the first information in the first aspect.

For example, the transceiver may be further configured to transmit second information to the terminal device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameters. The second information may be implemented as described with reference to the second information in the first aspect.

In a sixth aspect, the present application provides a communication device. The communication device may be adapted to carry out the functions referred to in the second aspect or any one of the possible designs of the second aspect. The functionality may be implemented by hardware, or by hardware executing corresponding software, which comprises one or more modules corresponding to the functions or method steps or operations in the second aspect and any of its designs above. In particular, the communication device may be a network device or a chip in a network device.

In carrying out the method of the second aspect described above, the communications module may be configured to receive first information from the network device, the first information indicating a plurality of QCL parameters for DMRS ports on the first resource. The communications module may also be configured to receive the DMRS through the DMRS port. The above implementation of the first information may refer to the description about the first information in the second aspect.

For example, the communication module may be further configured to receive second information from the network device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameters. The second information may be implemented as described with reference to the second information in the second aspect.

In addition, the communication module may be further configured to receive third information from the network device if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters. The third information may be implemented as described with reference to the third information in the second aspect.

In another possible example, the communication device may include a processor (or processing chip, processing circuit) and a transceiver (or communication circuit). The processor may be configured to invoke program instructions to perform processing functions of the communication device. The communication module can be used for the communication device to carry out communication. Wherein, the program instruction can be stored in a memory, the memory can be used as a part of the communication device, and the communication device can also comprise a memory; alternatively, the memory may be connected to the processor and/or transceiver in a manner external to the communication device.

In carrying out the method of the second aspect described above, the transceiver may be configured to receive first information from the network device, the first information indicating a plurality of QCL parameters for DMRS ports on the first resource. The transceiver may also be configured to receive the DMRS through the DMRS port. The above implementation of the first information may refer to the description about the first information in the second aspect.

For example, the transceiver may be further configured to receive second information from the network device, the second information being usable to indicate a correspondence between the TCI status and the QCL parameters. The second information may be implemented as described with reference to the second information in the second aspect.

In addition, the transceiver may be further configured to receive third information from the network device if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters. The third information may be implemented as described with reference to the third information in the second aspect.

In a seventh aspect, the present application provides a communication device. The communication device may be adapted to implement the functionality of the third aspect or any of the possible designs of the third aspect. The functionality may be implemented by hardware or by hardware executing corresponding software, which comprises one or more modules corresponding to the functions or method steps or operations in the third aspect and any design thereof. In particular, the communication device may be a terminal device or a chip in the terminal device.

In performing the method of the third aspect, the processing module may be configured to determine the first information. The first information may be used to indicate a plurality of QCL parameters for a plurality of sets of DMRS ports. The communication module may be configured to send the first information to a terminal device. The communication module may also be configured to transmit the PDSCH with each port of the PDSCH corresponding to one of the DMRS ports in each group. The first information may be implemented as described with reference to the first information in the third aspect.

For example, the communication module may be further configured to send second information to the terminal device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameters. The second information may be implemented as described with reference to the second information in the third aspect.

In addition, if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters, the communication module may be further configured to transmit third information to the terminal device. The third information may be implemented as described with reference to the third information in the third aspect.

In another possible example, the communication device may include a processor (or processing chip, processing circuit) and a transceiver (or communication circuit). The processor may be configured to invoke program instructions to perform processing functions of the communication device. The communication module can be used for the communication device to communicate. Wherein, the program instruction can be stored in a memory, the memory can be used as a part of the communication device, and the communication device can also comprise a memory; alternatively, the memory may be connected to the processor and/or transceiver in a manner external to the communication device.

In carrying out the method of the third aspect above, the processor may be configured to determine the first information. The first information may be used to indicate a plurality of QCL parameters for a plurality of sets of DMRS ports. The transceiver may be operable to transmit the first information to the terminal device. The transceiver may also be configured to transmit the PDSCH with each port of the PDSCH corresponding to one of the DMRS ports in each group. The first information may be implemented as described with reference to the first information in the third aspect.

For example, the transceiver may be further configured to transmit second information to the terminal device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameters. The second information may be implemented as described with reference to the second information in the third aspect.

In addition, if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters, the transceiver may be further configured to transmit third information to the terminal device. The third information may be implemented as described with reference to the third information in the third aspect.

In an eighth aspect, the present application provides a communication device. The communication device may be adapted to implement the functionality of the fourth aspect described above or any one of the possible designs of the fourth aspect. The functionality may be implemented by hardware, or by hardware implementing corresponding software comprising one or more modules corresponding to the functions or method steps or operations in the fourth aspect and any of its designs above. In particular, the communication device may be a network device or a chip in a network device.

In carrying out the method of the fourth aspect, the communications module may be configured to receive first information from a network device, the first information being indicative of a plurality of QCL parameters for a plurality of sets of DMRS ports. The communication module may be further configured to receive the PDSCH through the DMRS ports, where each port of the PDSCH corresponds to one DMRS port of each set of DMRS ports. The above implementation of the first information may refer to the description about the first information in the second aspect.

In carrying out the method of the fourth aspect described above, the transceiver may be configured to receive first information from a network device, the first information being indicative of a plurality of QCL parameters for a plurality of sets of DMRS ports. The transceiver may also be configured to receive the PDSCH through the DMRS ports, with each port of the PDSCH corresponding to one of the DMRS ports in each group. The above implementation of the first information may refer to the description about the first information in the second aspect.

For example, the transceiver may be further configured to receive second information from the network device, the second information being indicative of a correspondence between the TCI status and the QCL parameters. The second information may be implemented as described with reference to the second information in the second aspect.

In a ninth aspect, the present application provides a communication system. Illustratively, the communication system may comprise communication means for implementing any one of the above first aspect or any one of the above possible designs, and communication means for implementing any one of the above second aspect or possible designs. Alternatively, the communication system may comprise communication means for implementing any one of the above-mentioned third aspect or possible designs thereof, and communication means for implementing any one of the above-mentioned fourth aspect or possible designs thereof. In particular, the communication system may comprise the communication device of the fifth aspect as well as the communication device of the sixth aspect. Alternatively, the communication system may include the communication apparatus of the seventh aspect and the communication apparatus of the eighth aspect.

In one possible example, the communication system may include a network device and a terminal device to implement the methods of the first aspect and the second aspect.

Wherein the network device is operable to determine (or obtain) and send the first information to the terminal device. The first information may be used to indicate a plurality of QCL parameters for the DMRS port on the first resource. Accordingly, the terminal device may receive the first information. The network device may also transmit the DMRS through the DMRS port. Accordingly, the terminal device may receive the DMRS.

In another possible example, the communication system may include a network device and a terminal device to implement the methods in the third and fourth aspects.

Wherein the network device is operable to determine (or obtain) and send the first information to the terminal device. The first information may be used to indicate a plurality of QCL parameters for a plurality of sets of DMRS ports. Accordingly, the terminal device may receive the first information. The network device may also transmit a PDSCH with each port of the PDSCH corresponding to one of the DMRS ports in each group. Accordingly, the terminal device may receive the PDSCH.

In a tenth aspect, the present application provides a computer storage medium comprising program instructions that, when executed on a computer, cause the computer to perform the method of any one of the possible designs of the first aspect or the first aspect, or any one of the possible designs of the second aspect or the second aspect, or any one of the possible designs of the third aspect or the third aspect, or any one of the possible designs of the fourth aspect or the fourth aspect.

In an eleventh aspect, embodiments of the present application provide a computer program product, which when run on a computer, causes the computer to perform a method in any one of the possible designs of the first aspect or the first aspect, or any one of the possible designs of the second aspect or the second aspect, or any one of the possible designs of the third aspect or the third aspect, or any one of the possible designs of the fourth aspect or the fourth aspect.

In a twelfth aspect, the present application provides a system chip, where the system chip may include a processor, and may further include a memory (or the system chip is coupled to a storage), and the system chip executes program instructions in the storage to perform a method in any one of the possible designs of the first aspect or the first aspect, or any one of the possible designs of the second aspect or the second aspect, or any one of the possible designs of the third aspect or the third aspect, or any one of the possible designs of the fourth aspect or the fourth aspect. Where coupled means that the two components are joined to each other directly or indirectly, as can be where the two components are electrically connected.

Drawings

Fig. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present application;

fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 3 is a schematic application diagram of a communication method according to an embodiment of the present application;

fig. 4 is a schematic application diagram of another communication method provided in the embodiment of the present application;

fig. 5 is a schematic application diagram of another communication method provided in the embodiment of the present application;

fig. 6 is a schematic application diagram of another communication method provided in the embodiment of the present application;

fig. 7 is a schematic application diagram of another communication method provided in the embodiment of the present application;

fig. 8 is a schematic application diagram of another communication method provided in the embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings. The particular methods of operation in the method embodiments may also be applied in device embodiments or system embodiments.

As shown in fig. 1, a wireless communication system 100 provided in the embodiment of the present application includes a terminal device 101 and a network device 102. The application scenario of the wireless communication system 100 includes, but is not limited to, a New Radio (NR) system in a fifth generation (5 g) mobile communication system of a Long Term Evolution (LTE) system, a future mobile communication system, and the like.

Illustratively, the terminal device 101 may be a terminal (terminal), a Mobile Station (MS), a mobile terminal (mobile station), or the like, or a chip, a system-on-chip, or the like, and the terminal device 101 is capable of communicating with one or more network devices of one or more communication systems and accepting network services provided by the network devices, which includes but is not limited to the illustrated network device 102. For example, the terminal device 101 in the embodiment of the present application may be a mobile phone (or referred to as "cellular" phone), a computer with a mobile terminal, and the like, and the terminal device 101 may also be a portable, pocket, hand-held, computer-embedded, or vehicle-mounted mobile device. The terminal apparatus 101 may also be a communication chip having a communication module. It should be understood that terminal device 101 may be configured to support communication with network devices over a Uu air interface (universal user to network interface) of a general user and a network.

The terminal equipment 101 shown above may be User Equipment (UE), terminal (terminal), access terminal, terminal unit, terminal station, mobile Station (MS), remote station, remote terminal, mobile terminal (mobile terminal), wireless communication equipment, terminal agent or terminal equipment, etc. The terminal device may be capable of wireless transceiving, and may be capable of communicating (e.g., wirelessly communicating) with one or more network devices of one or more communication systems and receiving network services provided by the network devices, including but not limited to the illustrated network device 102.

The terminal device 101 may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN network, etc.

In addition, the terminal device 101 may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the terminal equipment can also be deployed on the water surface (such as a ship and the like); the terminal device 101 may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal 101 may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical treatment (remote medical), 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 home (smart home), and the like. The terminal device may also be a communication chip having a communication module, a vehicle having a communication function, an in-vehicle device (such as an in-vehicle communication apparatus, an in-vehicle communication chip), or the like.

Network device 102 may be an access network device (or access network site). The access network device refers to a device providing a network access function, such as a Radio Access Network (RAN) base station, and the like. The network device 102 may specifically include a Base Station (BS), or include a base station and a radio resource management device for controlling the base station, and the like. The network device 102 may also include relay stations (relay devices), access points, and base stations in future 5G networks, base stations in future evolved PLMN networks, or NR base stations, etc. The network device 102 may be a wearable device or a vehicle mounted device. The network device 102 may also be a chip with a communication module. It should be understood that in the present application, the network device 102 may support Uu interface communications.

For example, network devices 102 include, but are not limited to: next generation base stations (gnbs ) in 5G, evolved node bs (enbs) in LTE systems, radio Network Controllers (RNCs), radio controllers under CRAN systems, base Station Controllers (BSCs), home base stations (e.g., home evolved node bs or home node bs, HNBs), base Band Units (BBUs), transmission and Reception Points (TRPs), transmission Points (TPs), or mobile switching centers (msc). The network device 102 may also include a base station in a future 6G or newer mobile communication system.

The network device 102 may access a core network, such as a 5G core network, to obtain services on the core network side.

Based on the architecture shown in fig. 1, the network device 102 may indicate a time-frequency position of a currently scheduled physical uplink shared channel (PDSCH) to the terminal device 101, and in addition, the network device 102 may also indicate, to the terminal device 101, a TCI state adopted by a Demodulation Reference Signal (DMRS) port of the currently scheduled PDSCH through Downlink Control Information (DCI). For example, as shown in table 1, a TCI indication field may be carried in DCI to indicate a corresponding TCI status. Wherein each TCI state includes a quasi-co-location relationship between a DMRS port and a reference signal port. The quasi-co-location relationship between the DMRS port and the reference signal port included in each TCI state may be configured through signaling such as Radio Resource Control (RRC) and/or Media Access Control (MAC) Control Element (CE) or DCI. Specifically, the network device 102 may configure a quasi-co-located type and a reference signal index value in the type, where the configuration information indicates that, in the quasi-co-located type, a quasi-co-located association relationship exists between the reference signal and the DMRS port, that is, the quasi-co-located of the DMRS port may be obtained according to the reference signal. For example, if the configuration information configures a quasi-co-located type a, a quasi-co-located association relationship exists between a reference signal ID1 and a DMRS port, and configures a quasi-co-located association relationship exists between a reference signal ID2 and a DMRS port, the terminal device 101 may receive the DMRS according to a quasi-co-located parameter in the quasi-co-located type a and a quasi-co-located parameter in the quasi-co-located type D, which are obtained by the reference signal ID1.

The DMRS port of the data channel and the port of the reference signal satisfy a QCL relationship (or called, the DMRS and the one or more reference signals satisfy the QCL relationship). For example, the reference signal configured by the configuration information may be a channel state information reference signal (CSI-RS), a Tracking Reference Signal (TRS), a cell common reference signal (crs), or the like. It can be understood that the PDSCH and DMRS use the same ports, meaning that DMRS ports and PDSCH ports correspond one-to-one, and each PDSCH port uses a QCL hypothesis corresponding to the respective DMRS port.

TCI indication field	Corresponding meaning
000	TCI State 1
001	TCI State 2
…	…
111	TCI State 7

Table 1 TCI indication field in DCI

Each field value shown in table 1 may indicate one TCI state, and each TCI state may indicate a quasi-co-located relationship between a DMRS port and at least one reference signal port. The type (type) of the quasi co-address relationship (hereinafter, referred to as QCL type) includes qcltypeaa, QCL type B, QCL type C, and QCL type D. The QCL parameters (or QCL assumptions) corresponding to the QCL type a include Doppler shift (Doppler shift), doppler spread (Doppler spread), delay spread (delay spread), and average delay (average delay). The QCL parameters corresponding to the QCL type B comprise Doppler frequency offset and Doppler extension, and the QCL parameters corresponding to the QCL type C comprise Doppler frequency offset and average time delay. The QCL parameter corresponding to the QCL type D includes a spatial Rx parameter (spatial Rx parameter) of the DMRS port or a spatial receive beamforming parameter.

Specifically, taking QCL type a as an example, if there is a QCL type a relationship between the DMRS port and the reference signal port 1, the doppler frequency offset, doppler spread, delay spread, and average delay of the DMRS port are determined according to the reference signal port 1, for example, if the terminal device 101 performs signal processing according to the reference signal port 1 to determine the relevant parameters included in QCL type a, the parameters of the DMRS port and the parameter system of the reference signal port have a corresponding relationship. In addition, if a QCL type D relationship exists between the DMRS port and the reference signal port, the spatial reception parameter or the spatial reception beamforming parameter of the DMRS port is determined according to the reference signal port. It should be understood that the respective reception beam information of the plurality of reference signals satisfying the QCLtype D relationship is the same, and the reception beam of the data channel is the same as the reception beam of the DMRS, that is, based on the QCL relationship and the reception beam information of the reference signals, the terminal device 101 may infer the reception beam employed for receiving the data channel and the DMRS.

In the prior art, DMRS ports and PDSCH ports or layers are consistent or in one-to-one correspondence. That is, the number of ports or the number of layers of the PDSCH is equal to the number of DMRS ports, and each port or each layer of the PDSCH corresponds to one DMRS port in turn, and the terminal device 101 may obtain a channel estimation result according to the DMRS ports for data reception of the corresponding PDSCH ports or layers. The QCL parameters of the DMRS port described above are also applicable to the corresponding PDSCH. The DMRS ports are used for defining physical resources for bearing the DMRS on the network side, and one DMRS port can correspond to specific time-frequency code domain resources in the network and the DMRS of a specific channel. For example, DMRS port 0 may occupy odd subcarriers in the network, DMRS port 1 may occupy even subcarriers in the network, and DMRS port 2 may also occupy even subcarriers in the network, but different code domain resources are used from DMRS port 1, and for example, DMRS port 0 may be used for channel estimation of PDSCH, and DMRS port 1000 may be used for channel estimation of PDCCH.

Therefore, based on the TCI status correspondence shown in table 1, the terminal device 101 can know the TCI status indicated by the network device 102, and determine the QCL parameter of the DMRS port according to the indicated TCI status, thereby receiving the DMRS according to the QCL parameter.

Currently, the above scheme of configuring the TCI status and receiving the DMRS according to the TCI status may be used for various communication scenarios.

The embodiment of the application provides a communication method for improving data transmission performance. It should be understood that the method can be applied to high-speed mobile communication scenes such as high-speed rails and the like. However, the present application is not limited to the application of the communication method to mobile communication scenarios other than the high-speed mobile communication scenario.

As shown in fig. 2, the method provided in the embodiment of the present application may include the following steps:

s101: the network device determines first information. Or, the network device acquires the first information.

The first information is used to indicate a plurality of QCL parameters for the DMRS port on the first resource.

For example, the first information may be carried in DCI signaling, or the first information may be DCI.

It is to be understood that the first resource may be a specific time-frequency domain resource, e.g., N Resource Blocks (RBs) in the frequency domain and N OFDM symbols in the time domain or one slot in the time domain. The first resource may be determined according to DCI signaling in which the first information is located.

In one possible implementation, the plurality of QCL parameters are employed by all DMRS ports carried on the first resource. For example, the first resource includes a first RB and a second RB, and the DMRS ports on the first RB and the second RB both use the plurality of QCL parameters, and for example, the first resource includes a first DMRS port and a second DMRS port, and the first DMRS port and the second DMRS port both use the plurality of QCL parameters.

It should be understood that the QCL parameters of the DMRS ports are used to indicate QCL assumptions used in channel estimation through DMRS, and the channel estimation performance of the terminal device can be improved by indicating the QCL parameters to the terminal device.

In one possible implementation, the DMRS port corresponds to a physical downlink shared channel PDSCH, that is, the DMRS may be used for channel estimation for PDSCH demodulation, and occupies a specific frequency domain position in the PDSCH, for example, may occupy the same bandwidth, or occupies a specific time domain position in the PDSCH, for example, may occupy the first K OFDM symbols.

In another possible implementation, the DMRS port corresponds to a physical downlink control channel PDCCH, that is, the DMRS may be used for channel estimation for PDCCH demodulation. At this time, the first information may be carried in RRC or MAC CE signaling.

S102: the network device sends the first information to the terminal device.

Accordingly, the terminal device receives the first information.

S103: the network device transmits the DMRS through the DMRS port.

With the above method, the network device may configure the terminal device with a plurality of QCL parameters associated to the DMRS port of the first resource. Therefore, on the first resource, the terminal device may obtain an equivalent QCL parameter according to the plurality of QCL parameters, and the equivalent QCL parameter may accurately reflect the channel state, so as to perform channel estimation on the DMRS port according to the equivalent QCL parameter, and receive data according to the structure of the channel estimation, so as to improve the robustness of data reception on the first resource.

It is to be appreciated that, in accordance with the method illustrated in fig. 2, terminal device 101 can obtain a plurality of QCL parameters from network device 102, wherein the plurality of QCL parameters correspond to DMRS ports on the first resource. For example, if the number of the plurality of QCL parameters is n, where n is a positive integer, the channel H through which the terminal device 101 actually receives the DMRS port signal may be represented as H1+ H2+ … + Hn, where H1 is a channel determined according to the 1 st QCL parameter, H2 is a channel determined according to the 2 nd QCL parameter, and so on. The filter coefficients can be obtained by synthesizing the n QCL parameters, and then the channel estimation result can be obtained by operating the filter coefficients obtained by synthesis and the obtained channel, and the result can be used for corresponding data reception. For another example, if the number of the plurality of QCL parameters is n, where n is a positive integer, the terminal device 101 may determine the equivalent QCL parameter according to the n QCL parameters, and then the filter coefficient, the frequency offset value, or the delay value used when performing channel estimation according to the DMRS may be determined according to the equivalent QCL parameter.

Illustratively, the plurality of QCL parameters include a plurality of first QCL parameters, or alternatively, include a plurality of first QCL parameters and one or more second QCL parameters. The QCL type of the first QCL parameter is different from the QCL type of the second QCL parameter.

The first QCL parameter is a QCL parameter corresponding to QCL type A, QCL type B or QCL type A. The second QCL parameter is a QCL parameter corresponding to QCL type D. Illustratively, the first QCL parameters include doppler frequency offset, doppler spread, delay spread, and average delay. The second QCL parameters include spatial reception parameters or spatial reception beamforming parameters.

In one possible embodiment, one DMRS port includes a plurality of QCL parameters of QCL type a and one QCL parameter of QCL type D. At this time, the terminal device may receive the DMRS on the DMRS port by using one receiving beam, and determine an equivalent doppler frequency offset, doppler spread, delay spread, and average delay parameter for channel estimation of the DMRS according to the multiple doppler frequency offset, doppler spread, delay spread, and average delay parameter. Therefore, high-precision channel estimation in Single Frequency Network (SFN) based PDSCH transmission in a high-frequency scene can be supported.

It should be understood that, in the plurality of QCL parameters indicated by the first information, the type of each QCL parameter may be the same or different, and the value of each QCL parameter may be the same or different. Specifically, the plurality of QCL parameters may include RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter, the RS ID1 under the first QCL parameter is used to represent the first QCL parameter represented by the RS ID1, the RS ID2 under the first QCL parameter is used to represent the first QCL parameter represented by the RS ID2, and the RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter may be the first QCL parameter with the same or different values. The RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter may both include parameters such as doppler frequency offset, doppler spread, delay spread, and average delay. Values of each parameter in the RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter may be the same or different, for example, a doppler frequency shift included in the RS ID1 under the first QCL parameter and a doppler frequency shift included in the RS ID2 under the first QCL parameter may be the same or different.

In one possible example of the communication method according to the embodiment of the present application, the first information includes TCI status information. The TCI status information is used to indicate the plurality of QCL parameters, for example, as shown in table 1, each TCI indication field can be regarded as a TCI indication field for indicating a plurality of first QCL parameters. Wherein the TCI status information may correspond to one of one or more TCI statuses configured by the network device 102 to the terminal device 101.

For example, the network device 102 may send second information to the terminal device 101 to indicate the correspondence between the TCI status and the QCL parameters. The TCI state may include one or more TCI states, the QCL parameters may include one or more QCL parameters, and the correspondence between the TCI states and the QCL parameters may be that any of the one or more TCI states corresponds to one or more of the one or more QCL parameters. One of the TCI status information in the first information may be used to indicate one of the one or more TCI statuses indicated in the second information. The second information may be indicated by signaling such as RRC, MAC CE, or DCI. The correspondence may be as shown in table 2. Specifically, the network device may configure a QCL type (i.e., QCL parameter) included in each TCI state, and a reference signal ID included in each QCL type, where the TCI state is used to indicate a quasi-co-location relationship between the DMRS port and the reference signal. In the following table, the first QCL parameters corresponding to different RS IDs respectively represent the RS IDs under the first QCL parameters, for example, in TCI state 1, the first QCL parameter corresponding to RS ID1 is RS ID1 under the first QCL parameter.

TABLE 2

As can be seen, each TCI state in table 2 may correspond to a plurality of QCL parameters. After the terminal device 101 determines the TCI status information according to the first information, table 2 may be queried to determine the plurality of QCL parameters indicated by the network device 102. For example, if the TCI status indicated by the TCI status information is TCI status 1, the terminal device 101 may determine that RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter are QCL parameters of the DMRS port on the first resource.

Further, in this example, network device 102 may also transmit third information to terminal device 101 if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters. The third information may be used to indicate a correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters, so that terminal device 101 associates the first QCL and the second QCL parameters, thereby performing channel estimation according to the associated QCL parameters. For example, for TCI state 3 in table 2, the network device further needs to configure that RS ID5 under the first QCL parameter and RS ID2 under the second QCL parameter have an association relationship, and RS ID6 under the first QCL parameter and RS ID3 under the second QCL parameter have an association relationship, based on the third information, the terminal device may receive the DMRS signal using the receiving beam corresponding to RS ID2 under the second QCL parameter, and determine the channel estimation result 1 according to the associated RS ID5 under the first QCL parameter and the DMRS signal. And, the terminal device may receive the DMRS signal using the reception beam corresponding to the RS ID3 under the second QCL parameter, and determine the channel estimation result 2 according to the RS ID6 under the associated first QCL parameter and the DMRS signal. After that, the terminal device may receive the PDSCH according to the channel estimation result 1 and the channel estimation result 2. The third information may be carried in signaling such as RRC, MAC CE, or DCI. For example, the third information and the first information are carried on the same DCI.

Optionally, the corresponding relationship between the plurality of first QCL parameters and the plurality of second QCL parameters may be predefined, for example, the corresponding relationship is determined according to a sequence of parameter configuration, and the configuration sequence numbers of the plurality of first QCL parameters sequentially correspond to the plurality of second QCL parameters, the configuration sequence numbers of which are sequentially from small to large.

Optionally, the terminal device 101 determines to receive the PDSCH by using an advanced receiving algorithm according to the TCI state configured in table 2. Specifically, when the DCI indicates one of the TCI states configured in table 2, that is, at least two QCL parameters of the same type are configured in the TCI state, the terminal device 101 needs to synthesize the QCL parameters according to its own algorithm, and receive the DMRS and the corresponding data channel using the synthesized QCL parameters.

Optionally, when at least one TCI state in the TCI state indicated by the DCI or the TCI state configured by the RRC has at least two QCL parameters of the same type, a time interval between a reception start time of the DMRS and the corresponding data channel and a reception end time of the DCI is t1; when the DCI indicates only one TCI state or only one QCL parameter of the same type is configured for each of all TCI states configured by the RRC, a time interval between a reception start time of the DMRS and the corresponding data channel and a reception end time of the DCI is t2. Wherein t1 may be greater than t2.

Optionally, the terminal device 101 may report to the network device 102 that the TCI status supporting configuration includes at least two QCL parameters of the same type.

In another possible example, the first information may be used to indicate a plurality of TCI status information, wherein one of the plurality of TCI status information may be used to indicate one QCL parameter. For example, any one of the plurality of TCI status information may be used to indicate one QCL parameter, or each of the plurality of TCI status information may be used to indicate one QCL parameter.

For example, if the plurality of QCL parameters includes a plurality of first QCL parameters, one of the plurality of TCI status information may be used to indicate one first QCL parameter. In this example, the network device 102 may transmit second information to the terminal device 101 to indicate a correspondence between TCI states and QCL parameters, where each TCI state corresponds to one QCL parameter. The second information may be indicated by signaling such as RRC, MAC CE, or DCI. In this example, the correspondence between TCI states and QCL parameters is shown in table 3. The first information is specifically shown in the TCI indication field of table 4, where a TCI status corresponding to each TCI indication field value may be preconfigured by the network device.

TABLE 3

TCI indication field	Corresponding meaning
000	TCI State 1, TCI State 2
001	TCI State 1, TCI State 3
…	…
111	TCI State 4

Table 4 TCI indication field in DCI

As can be seen, each TCI state in table 3 may correspond to a QCL parameter. After the terminal device 101 determines a plurality of TCI status information according to the first information, such as TCI indication field values 000 and 001 in table 4, table 3 may be queried to determine a plurality of QCL parameters indicated by the network device 102. For example, the TCI status information included in the first information indicates TCI status 1 and TCI status 2, and if the TCI status information in table 4 indicates that the field value is 000, the terminal device 101 may determine that the RS ID1 under the first QCL parameter and the first QCL parameter 3 are the QCL parameters of the DMRS port on the first resource.

Furthermore, in this example, the network device 102 may further transmit fourth information to the terminal device 101 to instruct the terminal device 101 to determine, according to the multiple TCI states, that the DMRS port of the first resource adopts the multiple QCL parameters after receiving the multiple TCI states indicated by the first information, so as to prevent the terminal device 101 from associating the multiple QCL parameters with different DMRS ports or associating the multiple QCL parameters with DMRS ports on different frequency-domain resources. It should be understood that the fourth information may be used to instruct the terminal device 101 to perform the transmission of data according to the method shown in fig. 2. Specifically, the fourth information may be used to indicate that a plurality of TCI states or a plurality of QCL parameters correspond to the same DMRS port. The fourth information may be carried on the same DCI as the first information, or the fourth information may be a part of the first information. In addition, the fourth information may be carried in signaling such as RRC, MAC CE, or DCI.

In a possible implementation manner, when the first information indicates that one TCI state includes multiple first QCL parameters, all DMRS ports scheduled by the DCI where the first information is located use the multiple first QCL parameters on all scheduled time-frequency resources.

In a possible implementation manner, when the first information indicates multiple TCI states, the terminal device further needs to determine a receiving behavior of the DMRS according to fourth information, specifically, the fourth information is DMRS port indication information used for indicating a DMRS port number to be scheduled, and when the DMRS port number indicated by the fourth information is located in a same Code Division Multiplexing (CDM) group, all DMRS ports scheduled by the DCI where the first information is located all use multiple first QCL parameters on all time-frequency resources to be scheduled; and when the DMRS port number indicated by the fourth information is located in different code division multiplexing groups, the DMRS ports located in different CDM groups adopt different first QCL parameters.

In a possible implementation, when the first information indicates multiple TCI states, the terminal device further needs to determine the DMRS reception behavior according to the fourth information. Specifically, the fourth information includes DMRS port indication information for indicating a DMRS port number to be scheduled, and when the DMRS port number indicated by the fourth information is in the same code division multiplexing group and the fourth information indicates that SFN mode is currently used for transmission, all DMRS ports scheduled by DCI where the first information is located all use a plurality of first QCL parameters on all time-frequency resources to be scheduled; when the DMRS port number indicated by the fourth information is located in the same code division multiplexing group and the fourth information indicates that Frequency Division Multiplexing (FDM) mode is adopted in current transmission, different first QCL parameters are adopted by all DMRS ports scheduled by DCI where the first information is located on a first part of time frequency resources and a second part of time frequency resources, and when the DMRS port number indicated by the fourth information is located in different code division multiplexing groups, different first QCL parameters are adopted by DMRS ports located in different CDM groups.

In one possible embodiment, the reference signals corresponding to the plurality of first QCL parameters are the same. The terminal device may determine that the current PDSCH transmission adopts the SFN mode according to the indication information, and further adopt a specific channel estimation algorithm, for example, detect the reception intensity of multipath and multipath in the channel through the reference signal corresponding to the first QCL parameter, when the reception intensity of multipath is comparable, the terminal device estimates the equivalent frequency offset according to the detected multipath to receive the DMRS, and when the difference of the reception intensity of multipath is larger, the terminal device receives the DMRS according to the frequency offset obtained by the detected stronger path.

In addition, in this example, the terminal device 101 may also determine that the multiple TCI statuses are associated to the same DMRS port by using an implied indication. For example, when the second QCL parameters corresponding to the multiple TCI states are associated with the same reference signal port, terminal device 101 may determine that the multiple TCI states are associated with the same DMRS port, and then may determine the multiple QCL parameters according to the multiple TCI states.

Optionally, the terminal device 101 may determine to receive the PDSCH by using an advanced receiving algorithm according to multiple TCI states indicated in the DCI and corresponding to the same DMRS port on the same physical resource. Specifically, when the DCI indicates a plurality of TCI states and receives the fourth information, the terminal device 101 needs to synthesize the QCL parameter according to its own algorithm, and receive the DMRS and the corresponding data channel using the synthesized QCL parameter.

Optionally, when the DCI indicates a plurality of TCI states and the fourth information is received, a time interval between a reception start time of the DMRS and the corresponding data channel and a reception end time of the DCI is t3; when the DCI indicates that any condition of the multiple TCI statuses and the received fourth information is not satisfied (or when the DCI does not indicate the multiple TCI statuses and/or the terminal apparatus 101 does not receive the fourth information), the time interval between the reception start time of the DMRS and the corresponding data channel and the reception end time of the DCI is t4. Wherein t3 may be greater than t4.

Optionally, the terminal device 101 reports the multiple TCI statuses and the fourth information to the network device 102.

In the embodiment of the present application, a plurality of QCL parameters may be indicated (or referred to as, represented, and characterized) by a plurality of downlink reference signals. Specifically, the first information may include TCI status information, and the TCI status corresponding to the TCI status information may correspond to the downlink reference signals. For example, TCI state 1 is used to indicate the quasi co-located relationship between the DMRS port and the reference signals RS1 and RS2, and it can be understood that a plurality of QCL parameters are indicated by the reference signals RS1 and RS 2.

The plurality of downlink reference signals may be from one or more Transmission Reception Points (TRPs).

The following describes a method for indicating multiple QCL parameters by downlink reference signals in a specific case.

In case one, the plurality of QCL parameters is a plurality of first QCL parameters.

In this case, the first information may indicate one or more first downlink reference signals, wherein the one or more first downlink reference signals are associated with the plurality of first QCL parameters. Specifically, the one or more first downlink reference signals and the DMRS port on the first resource have the same first QCL parameters, or first QCL hypotheses; in other words, the one or more first downlink reference signals and the DMRS are QCL under the first QCL parameter. The plurality of first downlink reference signals and the plurality of first QCL parameters are in one-to-one correspondence, or one first downlink reference signal corresponds to the plurality of first QCL parameters. The first downlink reference signal may be a TRS or a CSI-RS.

Taking the plurality of first downlink reference signals as TRSs as an example, the TCI status indicated by the TCI status information included in the first information may correspond to respective identifiers of the plurality of TRSs.

For example, as shown in table 5, TCI state 1 may correspond to TRS1 and TRS2, where TRS1 corresponds to RS ID1 under the first QCL parameter and TRS2 corresponds to RS ID2 under the first QCL parameter. It should be understood that the correspondence between the reference signal identifiers and the QCL parameters is shown in table 5 by way of example only, and the present application does not exclude that one reference signal identifier may correspond to multiple QCL parameters, for example, the TRS1 may also correspond to the RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter.

TABLE 5

As shown in table 5, if one piece of TCI status information indicates the TCI status 1 in the first information, the terminal apparatus 101 may determine, according to the TRS1, an RS ID1 under the first QCL parameter, and determine, according to the TRS2, an RS ID2 under the first QCL parameter.

In addition, if the plurality of first QCL parameters are indicated by a plurality of TCI status information in the first information, the TCI status indicated by each TCI status information may correspond to an identifier of a part of TRSs in the plurality of TRSs.

For example, as shown in table 6, TCI state 1 may correspond to TRS1, where TRS1 corresponds to RS ID1 under the first QCL parameter. Further, TCI state 2 may correspond to TRS2, where TRS2 corresponds to RS ID2 under the first QCL parameter. It should be understood that the correspondence between the reference signal identifiers and the QCL parameters is shown in table 6 by way of example only, and the present application does not exclude that one reference signal identifier may correspond to multiple QCL parameters, for example, the TRS1 may also correspond to the RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter.

TCI State	Reference signal identification	QCL parameters
TCI State
1	TRS1	First QCL parameters
TCI State 2	TRS2	First QCL parameter
TCI State 3	CSI-RS1	Second QCL parameters
TCI State 4	CSI-RS2	Second QCL parameter
TCI State 5	CSI-RS3、CSI-RS4	Second QCL parameters
TCI State 6	CSI-RS5、CSI-RS6	Second QCL parameters
TCI State 7	CSI-RS7	First QCL parameters
……	……	……

TABLE 6

As shown in table 6, if the TCI status 1 and TCI status 2 are indicated by the TCI status information in the first information, the terminal device 101 may determine the RS ID1 under the first QCL parameter according to the TRS1 corresponding to the TCI status 1, and determine the RS ID2 under the first QCL parameter according to the TRS2 corresponding to the TCI status 2. Therefore, RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter can be indicated by TRS1 and TRS 2.

In an optional embodiment, multiple first QCL parameters may correspond to the same first downlink reference signal, and the terminal device 101 may determine, according to the configuration information, a method for receiving the first downlink reference signal. Specifically, the terminal device 101 needs to identify multiple paths with higher signal strength in the first downlink reference signal by using an advanced receiving algorithm, and determine frequency offset estimation values corresponding to the paths, respectively.

Further, the terminal device 101 needs to determine, according to the configuration information, a DMRS method that has a QCL association relationship with the first downlink reference signal. Specifically, each path in the DMRS is identified according to the frequency offset estimation value corresponding to each path, and subsequent channel filtering is performed.

In case two, the plurality of QCL parameters includes a plurality of first QCL parameters and one or more second QCL parameters.

In this case, referring to case one, one or more first downlink reference signals may be indicated by the first information to indicate the plurality of first QCL parameters. Further, in this case, the one or more second QCL parameters may also be indicated by at least one of the one or more first downlink reference signals, wherein the at least one of the one or more first downlink reference signals is associated with the one or more QCL parameters. Specifically, at least one of the one or more first downlink reference signals and the DMRS have the same second QCL parameter, or at least one of the one or more first downlink reference signals and the DMRS are QCL under the second QCL parameter. For example, as shown in table 5, TCI state 2 may correspond to TRS3, TRS4, and TRS5, respectively, where TRS3 corresponds to RS ID3 under the first QCL parameter, TRS4 corresponds to RS ID4 under the first QCL parameter, and TRS5 corresponds to RS ID5 under the first QCL parameter. If the TCI status information indicates TCI status 2 in the first information, the terminal device 101 may determine RS ID3 under the first QCL parameter according to TRS3, determine RS ID4 under the first QCL parameter according to TRS4, and determine RS ID1 under the second QCL parameter according to TRS 3.

In a specific implementation, as shown in fig. 3, in the present application, the first QCL parameter of DMRS port 0 may be indicated by TRS1 and TRS2, and the second QCL parameter of DMRS port 0 may be indicated by TRS 1. In this example, the UE101 may receive the PDSCH scheduled by the first information based on the receive beam of the TRS 1. Wherein, TRS1 and TRS2 are from transmission point 1 and transmission point 2, respectively.

In this case, the plurality of first downlink reference signals among the plurality of first downlink reference signals indicated by the first information may have the same second QCL parameter as the DMRS, and the second QCL parameter may be indicated by the second downlink reference signal. For example, as shown in table 5, TCI state 3 may correspond to TRS3 and TRS4, respectively, where TRS3 corresponds to RS ID3 under the first QCL parameter and TRS4 corresponds to RS ID4 under the first QCL parameter. Further, TRS3 also corresponds to RS ID2 under the second QCL parameter, and TRS4 also corresponds to RS ID3 under the second QCL parameter. If the TCI status information indicates the TCI status 3 in the first information, the terminal device 101 may determine, according to the TRS3, an RS ID3 under the first QCL parameter and an RS ID2 under the second QCL parameter, and determine, according to the TRS4, an RS ID4 under the first QCL parameter and an RS ID3 under the second QCL parameter.

In a specific implementation, if the first downlink reference signal is a TRS and the plurality of QCL parameters includes a second QCL parameter, as shown in fig. 4, in the present application, the first QCL parameter of the DMRS port 0 may be indicated by a TRS1 and a TRS2, and the second QCL parameter of the DMRS port 0 may be indicated by a TRS1 and a TRS 2. In this example, the UE may receive the PDSCH scheduled by the first information based on the receive beams of TRS1 and TRS 2. Generally, the receiving beams of the TRS1 and TRS2 are different, so the UE needs to use different antenna panels (or antenna groups) to receive. In this example, data and the DMRS are received by two receiving beams (corresponding to two antenna panels) of the TRS1 and the TRS2, respectively, and further, channel parameters, such as doppler frequency offset or doppler delay spread, may be determined based on respective TRSs, respectively, to perform independent channel estimation, and then obtain soft information of the data, respectively, to combine the soft information, so as to increase robustness.

In addition, in this case, in addition to the plurality of first QCL parameters being indicated by the plurality of first downlink reference signals, second QCL parameters may be indicated by one or more second downlink reference signals, wherein the one or more second downlink reference signals are associated with the one or more second QCL parameters. Specifically, the one or more second downlink reference signals and the DMRS have the same second QCL parameter, or the one or more second downlink reference signals and the DMRS are QCL under the second QCL parameter. Specifically, the first information may further indicate a second downlink reference signal, where the second downlink reference signal and the DMRS have the same second QCL parameter. The configuration of the first downlink reference signal can refer to the description in case one. The second downlink reference signal is of a different type than the first downlink reference signal. For example, if the first downlink reference signal is a TRS, the second downlink reference signal is a CSI-RS (or another type of RS other than the TRS and the CSI-RS); if the first downlink reference signal is a CSI-RS, the second downlink reference signal is a TRS (or another type of RS other than a TRS or CSI-RS).

As shown in table 6, the first downlink reference signal may include TRS1 corresponding to TCI state 1 and/or TRS2 corresponding to TCI state 2, and accordingly, the plurality of QCL parameters indicated by TRS1 and TRS2 may include RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter. The second downlink reference signal may include CSI-RS1 corresponding to TCI state 3 and/or CSI-RS2 corresponding to TCI state 3, and accordingly, the QCL parameters indicated by CSI-RS1 and CSI-RS2 may include RS ID1 under the second QCL parameter and/or RS ID2 under the second QCL parameter.

In a specific implementation, if the first downlink reference signal is a TRS and the plurality of QCL parameters includes a second QCL parameter, as shown in fig. 5, in the present application, the first QCL parameter of the DMRS port 0 may be indicated by a TRS1 and a TRS2, and the second QCL parameter of the DMRS port 0 may be indicated by a non-zero power CSI-RS (e.g., a CS-RS1 shown in fig. 6). In this example, the UE may receive the first information scheduled PDSCH based on the reception beam of CSI-RS 1. In this example, before scheduling the PDSCH, the terminal device 101 may receive not only multiple TRSs but also multiple CSI-RSs, where the CSI-RSs are used to train a transceiving beam, that is, different beams may be used for receiving/transmitting different CSI-RSs, and the terminal device 101 may enable the network device 102 to determine an optimal receiving/transmitting beam for data transmission by reporting measurement information.

In addition, in this case, the first information may further indicate a plurality of second downlink reference signals having the same second QCL parameter as the DMRS. Still taking table 6 as an example, the second downlink reference signal may include CSI-RS3 and CSI-RS4 corresponding to the TCI state 5, and accordingly, the QCL parameters indicated by the CSI-RS3 and the CSI-RS4 may include RS ID3 under the second QCL parameter. For another example, in table 6, the second downlink reference signal may include CSI-RS5 and CSI-RS6 corresponding to the TCI state 6, and accordingly, the QCL parameters indicated by the CSI-RS5 and the CSI-RS6 may include RS ID4 under the second QCL parameter and RS ID5 under the second QCL parameter.

In a specific implementation, if the first downlink reference signal is a TRS and the plurality of QCL parameters includes a second QCL parameter, as shown in fig. 6, the first QCL parameter of DMRS port 0 may be indicated by a TRS1 and a TRS2 in the present application. Further, network device 102 may transmit CSI-RS1 and CSI-RS2 to terminal device 101 for beam training prior to transmitting the first information. In the first information, the second QCL parameter of the DMRS port 0 may be indicated by CSI-RS1 and CSI-RS2, and the terminal device may receive the PDSCH scheduled by the first information based on the reception beams of CSI-RS1 and CSI-RS 2. Further, the UE may perform channel estimation based on the channel received by the CSI-RS1 in combination with the channel parameters acquired by the TRS1, and combine the soft information of the respectively acquired data based on the channel received by the CSI-RS2 in combination with the channel parameters acquired by the TRS2, thereby increasing the robustness of data reception.

For example, the first downlink reference signal and the second downlink reference signal may be of the same type, for example, both of CSI-RS. Or, the at least one first downlink reference signal and the second downlink reference signal are of a type system, for example, the first downlink reference signal is a TRS and a CSI-RS, and the second downlink reference signal is a CSI-RS. As shown in table 6, the first downlink reference signal may include a TRS1 corresponding to a TCI state 1 and a CSI-RS7 corresponding to the TCI state 7, the second downlink reference signal may include a CSI-RS1 corresponding to a TCI state 3 and a CSI-RS2 corresponding to a TCI state 4, and the terminal device 101 may determine that the QCL parameters may include an RS ID1 under the first QCL parameter, an RS ID3 under the first QCL parameter, an RS ID1 under the second QCL parameter, and an RS ID2 under the second QCL parameter.

In a specific implementation, as shown in fig. 7, the first QCL parameter of DMRS port 0 may be indicated by TRS2 and CSI-RS2, and the second QCL parameter of DMRS port 0 may be indicated by CSI-RS 1. In this example, the UE may receive the first information scheduled PDSCH based on the receive beam of the CSI-RS 1. At this time, after receiving the TRS2, the network device may also transmit CSI-RS2 for further channel parameter estimation and CSI-RS1 for beam training.

It should be understood that the UE shown in fig. 3-7 above may be deployed or located on a vehicle moving at high speed, such as a vehicle, train, ship, or airplane.

Another communication method provided in the embodiment of the present application may include the process shown in fig. 8:

s201: the network device determines first information. Or, the network device obtains the first information.

The first information is used to indicate a plurality of QCL parameters for a plurality of sets of DMRS ports. Each group of the plurality of groups of DMRS ports corresponds to one of the plurality of QCL parameters, and each group of the plurality of groups of DMRS ports comprises at least one DMRS port. That is to say, different groups of DMRS ports correspond to a different QCL parameter, the same group of DMRS ports correspond to the same QCL parameter, and the number of DMRS groups is the same as the number of QCL parameters. Each set of DMRS ports may include one or more DMRS ports.

Optionally, the DMRS ports included in each of the groups of DMRS ports are the same in number.

Optionally, the number of DMRS ports included in each group of DMRS ports is the number of transmission layers of the PDSCH. For example, each set of DMRS ports includes 2 DMRS ports, and the number of transmission layers of the corresponding PDSCH is 2.

Optionally, one DMRS port in each group of DMRS ports in the plurality of groups of DMRS ports corresponds to a port of the same PDSCH. For example, the DMRS port group 0 includes a DMRS port 0 and a DMRS port 1, and the DMRS port group 1 includes a DMRS port 2 and a DMRS port 3, then the DMRS port 0 and the DMRS port 2 correspond to the same PDSCH port, and the DMRS port 1 and the DMRS port 3 correspond to the same PDSCH port.

Optionally, one DMRS port in each DMRS port group of the multiple DMRS ports sequentially corresponds to a PDSCH port having a port number from small to large according to the port number from small to large.

Optionally, multiple DMRS ports in one group of DMRS ports all belong to the same CDM group, and DMRS ports in different groups of DMRS ports belong to different CDM groups.

Optionally, the number of DMRS port groups is 2 or 3.

Optionally, the number of DMRS ports in the DMRS port group is 1, 2, 3, or 4.

S202: the network device sends the first information to the terminal device.

Accordingly, the terminal device receives the first information.

S203: and the network equipment transmits the PDSCH, wherein each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.

Accordingly, the terminal device determines a plurality of groups of DMRS ports according to the first information, and receives the PDSCH according to the plurality of groups of DMRS ports. Specifically, the channel estimation result of each PDSCH port is determined jointly according to one DMRS port in each group of DMRS ports in the plurality of groups of DMRS ports.

It is to be understood that the QCL parameters may include, for each DMRS port, the first QCL parameter, e.g., one first QCL parameter, or the first QCL parameter and the second QCL parameter, e.g., one first QCL parameter and one second QCL parameter. The first QCL parameter and the second QCL parameter may refer to the foregoing description. The DMRS ports in the same group have the same QCL parameters, namely, each DMRS port corresponds to the same first QCL parameter or the same first QCL parameter and second QCL parameter; the QCL parameters in different groups of DMRS ports are different, that is, DMRS ports in different groups correspond to different first QCL parameters or different first QCL parameters and second QCL parameters.

For example, the first information may include a TCI status information, which may be used to indicate the plurality of QCL parameters, e.g., to indicate the plurality of first QCL parameters.

Further, the network device 102 may transmit second information to the terminal device 101 to indicate a correspondence between the TCI status and the QCL parameters. The TCI state may include one or more TCI states, the QCL parameters may include one or more QCL parameters, and the correspondence between the TCI states and the QCL parameters may be that any of the one or more TCI states corresponds to one or more of the one or more QCL parameters. One of the TCI status information in the first information may be used to indicate one of the one or more TCI statuses indicated in the second information. The second information may be indicated by signaling such as RRC, MAC CE, or DCI. The correspondence may be as shown in table 7, and each TCI state may correspond to a plurality of QCL parameters. After terminal device 101 determines the TCI status information according to the first information, table 7 may be consulted to determine a plurality of QCL parameters for a plurality of DMRS ports indicated by network device 102. For example, when there are two sets of DMRS ports, and only one of each set of DMRS ports is included, if the network device indicates TCI state 3, a first of the two sets of DMRS ports is associated with the first QCL parameter of RS5 and with the second QCL parameter of RS7, and a second of the two sets of DMRS ports is associated with the first QCL parameter of RS6 and with the second QCL parameter of RS 8. One PDSCH port corresponds to the first and second sets of DMRS ports. It is to be understood that the first and second QCL parameters correspond to different QCL types. In the following table, the first QCL parameters corresponding to different RS IDs respectively indicate the RS IDs under the first QCL parameters.

TABLE 7

Furthermore, if the plurality of QCL parameters corresponding to the plurality of DMRS ports includes a plurality of first QCL parameters and a plurality of second QCL parameters, network device 102 may also transmit third information to terminal device 101. The third information may be used to indicate a correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters, so that terminal device 101 associates the first QCL and the second QCL parameters, thereby performing channel estimation according to the associated QCL parameters.

For example, for TCI state 3 in table 7, the network device further needs to configure that RS ID4 under the first QCL parameter and RS ID2 under the second QCL parameter have an association relationship, and RS ID5 under the first QCL parameter and RS ID3 under the second QCL parameter have an association relationship, based on the third information, the terminal device may receive DMRS signal 1 using a receiving beam corresponding to RS ID2 under the second QCL parameter, and determine channel estimation result 1 according to RS ID4 under the associated first QCL parameter and DMRS signal 1. And, the terminal device may receive the DMRS signal 2 using the reception beam corresponding to the RS ID3 under the second QCL parameter, and determine the channel estimation result 2 according to the RS ID5 under the associated first QCL parameter and the DMRS signal 2. After that, the terminal device may receive the PDSCH according to the channel estimation result 1 and the channel estimation result 2. The third information may be carried in signaling such as RRC, MAC CE, or DCI. For example, the third information and the first information are carried in the same DCI.

In another possible example, the first information may be used to indicate a plurality of TCI status information, wherein one of the plurality of TCI status information may be used to indicate one QCL parameter. For example, any one of the TCI status information may be used to indicate one QCL parameter, or each of the TCI status information may be used to indicate one QCL parameter

Specifically, if the plurality of QCL parameters includes a plurality of first QCL parameters, one of the plurality of TCI status information may be used to indicate one first QCL parameter. In this example, network device 102 may send second information to terminal device 101 to indicate a correspondence between TCI states and QCL parameters, where each TCI state corresponds to one QCL parameter. The second information may be indicated by signaling such as RRC, MAC CE, or DCI. In this example, the correspondence between TCI states and QCL parameters is shown in table 3. The first information is specifically shown in the TCI indication field of table 4, where a TCI status corresponding to each TCI indication field value may be preconfigured by the network device.

In an embodiment of the present application, a plurality of QCL parameters may be indicated by a plurality of downlink reference signals, where the plurality of downlink reference signals are associated with the plurality of QCL parameters. Specifically, the first information may include TCI status information, and the TCI status corresponding to the TCI status information may correspond to the downlink reference signals. For example, TCI state 1 is used to indicate the quasi co-located relationship between the DMRS port and the reference signals RS1 and RS2, and it can be understood that a plurality of QCL parameters are indicated by the reference signals RS1 and RS 2.

For example, the first information may be indicative of a plurality of first downlink reference signals, wherein the plurality of first downlink reference signals are associated with the plurality of first QCL parameters. Specifically, the plurality of first downlink reference signals and the plurality of DMRSs have the same first QCL parameter; in other words, the plurality of first downlink reference signals and DMRS are QCL under the first QCL parameter. The plurality of first downlink reference signals and the plurality of first QCL parameters are in one-to-one correspondence, or one first downlink reference signal corresponds to the plurality of first QCL parameters. The first downlink reference signal may be a TRS or a CSI-RS.

Taking the plurality of first downlink reference signals as TRSs as an example, the TCI status indicated by the TCI status information included in the first information may correspond to respective identifiers of the plurality of TRSs. For example, as shown in table 5, if one piece of TCI status information indicates TCI status 1 in the first information, the terminal apparatus 101 may determine RS ID1 under the first QCL parameter according to TRS1, and determine RS ID2 under the first QCL parameter according to TRS 2.

In addition, if the plurality of first QCL parameters can be indicated by a plurality of TCI status information in the first information, the TCI status indicated by each TCI status information may correspond to an identifier of a part of TRSs in the plurality of TRSs. For example, as shown in table 6, TCI state 1 may correspond to TRS1, where TRS1 corresponds to RS ID1 under the first QCL parameter. Further, TCI state 2 may correspond to TRS2, where TRS2 corresponds to RS ID2 under the first QCL parameter. Therefore, RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter can be indicated by TRS1 and TRS 2.

In this case, referring to case one, the plurality of first downlink reference signals may be indicated by the first information to indicate the plurality of first QCL parameters. In addition, in this case, the one or more second QCL parameters may also be indicated by one of the plurality of first downlink reference signals, wherein the one of the plurality of first downlink reference signals is associated with the one or more second QCL parameters. Specifically, the first downlink reference signal of the plurality of first downlink reference signals and the DMRS have the same second QCL parameter, or at least one of the first downlink reference signals of the plurality of first downlink reference signals and the DMRS are QCL under the second QCL parameter. For example, as shown in table 5, TCI state 2 may correspond to TRS3, TRS4, and TRS5, respectively, where TRS3 corresponds to RS ID3 under the first QCL parameter, TRS4 corresponds to RS ID4 under the first QCL parameter, and TRS5 corresponds to RS ID5 under the first QCL parameter. If the TCI status information indicates TCI status 2 in the first information, the terminal device 101 may determine RS ID3 under the first QCL parameter according to TRS3, determine RS ID4 under the first QCL parameter according to TRS4, and determine RS ID1 under the second QCL parameter according to TRS 3.

In this case, the plurality of first downlink reference signals of the plurality of first downlink reference signals indicated by the first information may further include the same second QCL parameter as the DMRS, and thus the second QCL parameter may be indicated by the second downlink reference signal. For example, as shown in table 5, TCI state 3 may correspond to TRS3 and TRS4, respectively, where TRS3 corresponds to RS ID3 under the first QCL parameter and TRS4 corresponds to RS ID4 under the first QCL parameter. Further, TRS3 also corresponds to RS ID2 under the second QCL parameter, and TRS4 also corresponds to RS ID3 under the second QCL parameter. Such that the plurality of first QCL parameters and the plurality of second QCL parameters may be indicated by the TRS3 and TRS 4.

In addition, in this case, in addition to the plurality of first QCL parameters being indicated by the plurality of first downlink reference signals, second QCL parameters may be indicated by one or more second downlink reference signals, wherein the one or more second downlink reference signals are associated with the second QCL parameters. The one or more second downlink reference signals and the DMRS have the same second QCL parameter, or the one or more second downlink reference signals and the DMRS have QCLs under the second QCL parameter. Specifically, the first information may further indicate a second downlink reference signal, where the second downlink reference signal and the DMRS have the same second QCL parameter. The configuration of the first downlink reference signal can refer to the description in case one. The second downlink reference signal is of a different type than the first downlink reference signal. For example, if the first downlink reference signal is a TRS, the second downlink reference signal is a CSI-RS (or another type of RS other than the TRS and the CSI-RS); if the first downlink reference signal is a CSI-RS, the second downlink reference signal is a TRS (or another type of RS other than a TRS or CSI-RS).

Based on the same inventive concept as the above method embodiments, the present application embodiment further provides a communication apparatus, which may have the functions or steps or operations of the network device or the terminal device in the above method embodiments. For example, functional modules corresponding to functions or steps or operations in the above methods may be provided in the communication device to support the communication device to execute the above methods. The functions may be implemented by hardware, or by software or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. Illustratively, the communication device may be or be implemented by a chip or a communication chip with a communication module.

In a possible implementation manner, the communication apparatus 900 shown in fig. 9 may be used as a network device according to the foregoing method embodiment, and perform the steps performed by the network device in the foregoing method embodiment. As shown in fig. 9, the communication apparatus 900 may include a communication module 901 and a processing module 902, and the communication module 901 and the processing module 902 are coupled to each other. The communication module 901 may be used to support the communication device 900 for communication, and the communication module 901 may have a wireless communication function, for example, being capable of performing wireless communication with other communication devices through a wireless air interface. The processing module 902 may be configured to enable the communication apparatus 900 to perform the processing actions in the above method embodiments, where the processing actions include, but are not limited to: generate information, messages, etc. transmitted by the communication module 901, and/or demodulate and decode signals received by the communication module 901.

It should be understood that the above communication module 901 can be specifically used for executing the actions of the network device transmitting and/or receiving in the communication method shown in fig. 2 or fig. 8. For example, the communication module 901 may be used to perform actions of a network device sending information, messages or signaling to a terminal device, or to perform actions of receiving information, messages or signaling from a terminal device.

Furthermore, the processing module 902 can be specifically used for executing the processing actions of the network device in the communication method shown in fig. 2 or fig. 8, such as operations of controlling the communication module 901 to receive and/or transmit information, message or signaling, and executing processing of information.

The processing module 902 may be configured to determine (or obtain) the first information when implementing the communication method provided by the flow shown in fig. 2 in the embodiment of the present application. Wherein the first information is for indicating a plurality of QCL parameters of the DMRS port on the first resource. The communication module 901 may be configured to send the first information to the terminal device. The communication module 901 may also be configured to transmit the DMRS through the DMRS port. The above first information implementation may refer to the description of the first information related to the method shown in fig. 2 in the method embodiment.

For example, the communication module 901 may be further configured to send second information to the terminal device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameter. The implementation of the second information may refer to the description of the second information related to the method shown in fig. 2 in the method embodiment.

In addition, if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters, the communication module 901 may be further configured to transmit third information to the terminal device. The third information may be implemented by referring to the description of the third information related to the method shown in fig. 2 in the method embodiment.

The processing module 902 may be configured to determine (or obtain) the first information when implementing the communication method provided by the flow shown in fig. 8 in the embodiment of the present application. Wherein the first information is used for indicating a plurality of QCL parameters of a plurality of groups of DMRS ports. The communication module 901 may be configured to send the first information to the terminal device. The communication module 901 may also be configured to transmit the PDSCH, where each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. The above first information implementation may refer to the description of the first information related to the method shown in fig. 8 in the method embodiment.

For example, the communication module 901 may be further configured to send second information to the terminal device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameter. The implementation of the second information may refer to the description of the second information related to the method shown in fig. 8 in the method embodiment.

In addition, if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters, the communication module 901 may be further configured to transmit third information to the terminal device. The third information may be implemented by referring to the description of the third information related to the method shown in fig. 8 in the method embodiment.

In another possible implementation manner, the communication apparatus provided in the embodiments of the present application may also be formed by hardware components, such as a processor, a memory, a transceiver, or the like, to implement the functions of the network device in the present application.

For ease of understanding, fig. 10 illustrates the structure of the communication apparatus by taking a base station as an example. As shown in fig. 10, the communication apparatus 1000 may include a transceiver 1001, a memory 1002, and a processor 1003 to implement the functions of the network device provided in the embodiment of the present application. The transceiver 1001 may be used for communication by a communication device. The memory 1002 is coupled to the processor 1003 and is used for storing programs and data necessary for the communication device 1000 to implement various functions. The processor 1003 is configured to support the communication apparatus 1000 to execute the corresponding functions of the network device in the above method, which can be implemented by calling the program stored in the memory 1002.

In particular, the transceiver 1001 may be a wireless transceiver, and may be configured to support the communications apparatus 1000 to receive and transmit signaling and/or data through a wireless air interface. The transceiver 1001 may also be referred to as a transceiver unit or a communication unit, and the transceiver 1001 may include a radio frequency unit, such as a Remote Radio Unit (RRU), which may be used for transmission of radio frequency signals and conversion of the radio frequency signals with baseband signals, and one or more antennas, which may be used for radiation and reception of the radio frequency signals. Alternatively, the transceiver 1001 may only include the above radio frequency units, and then the communication device 1000 may include the transceiver 1001, the memory 1002, the processor 1003 and the antenna.

The memory 1002 and the processor 1003 may be integrated or may be independent of each other. As shown in fig. 10, the memory 1002 and the processor 1003 may be integrated in a control unit 1010 of the communication apparatus 1000. Illustratively, the control unit 1010 may include a baseband unit (BBU) of an LTE base station, which may also be referred to as a Digital Unit (DU), or the control unit 1010 may include a Distributed Unit (DU) and/or a Centralized Unit (CU) in a base station under 5G and future radio access technologies. The control unit 1010 may be formed by one or more boards, where a plurality of boards may jointly support a radio access network of a single access system (e.g., an LTE network), and a plurality of boards may also respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The memory 1002 and processor 1003 may serve one or more boards. That is, the memory 1002 and the processor 1003 may be provided separately on each board. Multiple boards may share the same memory 1002 and processor 1003. In addition, each board may have necessary circuitry disposed thereon, e.g., to couple the memory 1002 and the processor 1003. The above transceivers 1001, processors 1003, and memory 1002 may be connected by a bus (bus) structure and/or other connection medium.

Based on the structure shown in fig. 10, when the communication device 1000 needs to transmit data, the processor 1003 may perform baseband processing on the data to be transmitted, and then output a baseband signal to the rf unit, and the rf unit performs rf processing on the baseband signal and then transmits the rf signal in the form of electromagnetic waves through the antenna. When there is data to be transmitted to the communication device 1000, the rf unit receives an rf signal through the antenna, converts the rf signal into a baseband signal, and outputs the baseband signal to the processor 1003, and the processor 1003 converts the baseband signal into data and processes the data.

It should be understood that the above transceiver 1001 may be specifically used to perform the actions of the network device transmitting and/or receiving in the communication method shown in fig. 2 or fig. 8. For example, transceiver 1001 may be used to perform actions of a network device sending information, messages, or signaling to a terminal device, or to perform actions of receiving information, messages, or signaling from a terminal device.

Further, the above processor 1003 can be specifically used for executing processing actions of the network device in the communication method shown in fig. 2 or fig. 8, such as operations of controlling the transceiver 1001 to perform receiving and/or transmitting of information, message or signaling, and executing processing of information.

In implementing the communication method provided by the flow shown in fig. 2 in the embodiment of the present application, the processor 1003 may be configured to determine (or obtain) the first information. Wherein the first information is for indicating a plurality of QCL parameters of the DMRS port on the first resource. Transceiver 1001 may be used to transmit this first information to a terminal device. Transceiver 1001 may also be used to transmit DMRS through the DMRS port. The above first information implementation may refer to the description of the first information related to the method shown in fig. 2 in the method embodiment.

For example, the transceiver 1001 may be further configured to transmit second information to the terminal device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameter. The implementation of the second information may refer to the description of the second information related to the method shown in fig. 2 in the method embodiment.

Furthermore, if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters, the transceiver 1001 may be further configured to transmit third information to the terminal device. The third information may be implemented by referring to the description of the third information related to the method shown in fig. 2 in the method embodiment.

In implementing the communication method provided by the flow shown in fig. 8 in the embodiment of the present application, the processor 1003 may be configured to determine (or obtain) the first information. Wherein the first information is used for indicating a plurality of QCL parameters of a plurality of groups of DMRS ports. Transceiver 1001 may be used to transmit this first information to a terminal device. The transceiver 1001 may also be used to transmit the PDSCH with each port corresponding to one of the DMRS ports in each group. The implementation of the above first information may refer to the description of the first information related to the method shown in fig. 8 in the method embodiment.

For example, the transceiver 1001 may be further configured to transmit second information to the terminal device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameter. The implementation of the second information may refer to the description of the second information related to the method shown in fig. 8 in the method embodiment.

Furthermore, if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters, the transceiver 1001 may be further configured to transmit third information to the terminal device. The third information may be implemented by referring to the description of the third information related to the method shown in fig. 8 in the method embodiment.

In a possible implementation manner, the communication apparatus 1100 shown in fig. 11 may be used as a terminal device according to the foregoing method embodiment, and perform the steps performed by the terminal device in the foregoing method embodiment. As shown in fig. 11, the communication device 1100 may include a communication module 1101 and a processing module 1102, wherein the communication module 1101 and the processing module 1102 are coupled to each other. The communication module 1101 may be configured to support communication with the communication device 1100, and the communication module 1101 may have a wireless communication function, such as being capable of wirelessly communicating with other communication devices via a wireless air interface. The processing module 1102 may be configured to enable the communication device 1100 to perform the processing actions in the above-described method embodiments, where the processing actions include, but are not limited to: generate information, messages sent by the communication module 1101, and/or demodulate and decode signals received by the communication module 1101, etc.

It should be understood that the above communication module 1101 can be specifically used for performing the actions of terminal device transmission and/or reception in the communication method shown in fig. 2 or fig. 8. For example, the communication module 1101 may be used to perform actions of a terminal device receiving information, messages, or signaling from a network device, or to perform actions of sending information, messages, or signaling to a network device.

Further, the above processing module 1102 may be specifically configured to execute processing actions of the terminal device in the communication method shown in fig. 2 or fig. 8, such as operations of controlling the communication module 1101 to receive and/or transmit information, message or signaling, and executing processing of information.

In implementing the communication method provided by the flow shown in fig. 2 in this embodiment of the present application, the communication module 1101 may be configured to receive first information from a network device, where the first information is used to indicate a plurality of QCL parameters of a DMRS port on a first resource. The communication module 1101 may also be configured to receive the DMRS through the DMRS port. The above first information implementation may refer to the description of the first information related to the method shown in fig. 8 in the method embodiment.

For example, the communication module 1101 may be further configured to receive second information from the network device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameters. The above implementation of the second information may refer to the description of the second information related to the method shown in fig. 8 in the method embodiment.

In addition, if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters, the communication module 1101 may be further configured to receive third information from the network device. The implementation of the above third information may refer to the description of the third information related to the method shown in fig. 8 in the method embodiment.

In implementing the communication method provided by the flow shown in fig. 8 in the embodiment of the present application, the communication module 1101 may be configured to receive the first information from the network device. Wherein the first information is used for indicating a plurality of QCL parameters of a plurality of groups of DMRS ports. The communication module 1101 may also be configured to receive a PDSCH, each port of the PDSCH corresponding to one DMRS port in each set of DMRS ports. The above first information implementation may refer to the description of the first information related to the method shown in fig. 8 in the method embodiment.

In another possible implementation manner, the communication apparatus provided in the embodiments of the present application may also be formed by hardware components, such as a processor, a memory, a transceiver, or the like. For convenience of understanding and illustration, fig. 12 illustrates a possible structure of the terminal device by taking a mobile phone as an example. As shown in fig. 12, the communications apparatus 1200 may include a processor 1201, a memory 1202, and a transceiver 1203.

The above processor 1201 may be used to process a communication protocol and communication data, control a terminal device, execute a software program, process data of the software program, and the like. The memory 1202 may be used to store programs and data, and the processor 1201 may execute the method performed by the terminal device in the embodiment of the present application based on the programs.

The transceiver 1203 may include a radio frequency unit and an antenna. The radio frequency unit can be used for converting the baseband signal and the radio frequency signal and processing the radio frequency signal. The antenna may be used for transceiving radio frequency signals in the form of electromagnetic waves. In addition, only the rf unit can be regarded as the transceiver 1203, and then the communication apparatus 1200 may include the processor 1201, the memory 1202, the transceiver 1203 and the antenna.

In addition, the communication device 1200 may also include an input/output device 1204, such as a touch screen, a display screen, or a keyboard, which may be used to receive data input by a user and to output data to the user. It should be noted that some kinds of communication devices may not have input/output devices.

Based on the structure shown in fig. 12, when the communication device 1200 needs to transmit data, the processor 1201 may perform baseband processing on the data to be transmitted, and output a baseband signal to the rf unit, and the rf unit performs rf processing on the baseband signal and then transmits the rf signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication apparatus 1200, the radio frequency unit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1201, and the processor 1201 converts the baseband signal into data and processes the data.

It should be understood that the above transceiver 1203 is particularly useful for performing the actions of terminal device transmission and/or reception in the communication method shown in fig. 2 or fig. 8. For example, the transceiver 1203 may be used to perform actions of a terminal device receiving information, messages, or signaling from a network device or to perform actions of sending information, messages, or signaling to a network device.

Further, the above processor 1201 can be specifically used to execute processing actions of the terminal device in the communication method shown in fig. 2 or fig. 8, such as operations of controlling the transceiver 1203 to receive and/or transmit information, message or signaling, and executing processing of information.

In implementing the communication method provided by the flow illustrated in fig. 2 in this embodiment of the present application, the transceiver 1203 may be configured to receive first information from a network device, where the first information is used to indicate a plurality of QCL parameters of a DMRS port on a first resource. The transceiver 1203 may also be configured to receive the DMRS through the DMRS port. The above first information implementation may refer to the description of the first information related to the method shown in fig. 8 in the method embodiment.

For example, the transceiver 1203 may be further configured to receive second information from the network device, where the second information may be used to indicate a correspondence between the TCI status and the QCL parameters. The above implementation of the second information may refer to the description of the second information related to the method shown in fig. 8 in the method embodiment.

In addition, the transceiver 1203 may be further configured to receive third information from the network device if the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters. The implementation of the above third information may refer to the description of the third information related to the method shown in fig. 8 in the method embodiment.

When the communication method provided by the flow shown in fig. 8 in the embodiment of the present application is implemented, the transceiver 1203 may be configured to receive the first information from the network device. Wherein the first information is used for indicating a plurality of QCL parameters of a plurality of groups of DMRS ports. The transceiver 1203 is also configured to receive PDSCH, each port of the PDSCH corresponding to one DMRS port in each set of DMRS ports. The above first information implementation may refer to the description of the first information related to the method shown in fig. 8 in the method embodiment.

In addition, according to the practical use requirement, the communication device provided by the embodiment of the application may include a processor, and the processor calls an external transceiver and/or a memory to implement the above functions or steps or operations. The communication device may also include a memory that is called by the processor and executes programs stored in the memory to implement the functions or steps or operations described above. Alternatively, the communication device may also include a processor, i.e., a transceiver, which is called by the processor and executes a program stored in an external memory to implement the above-mentioned functions or steps or operations. Alternatively, the communication device may also include a processor, memory, and a transceiver.

Based on the same concept as the method embodiments, embodiments of the present application further provide a computer-readable storage medium, on which program instructions (or computer programs, instructions) are stored, and when the program instructions are executed by a processor, the computer performs the operations performed by the network device and/or the terminal device in any possible implementation manner of the method embodiments and method embodiments.

Based on the same concept as the method embodiments, the present application also provides a computer program product, which includes program instructions, and when the computer program product is called by a computer and executed, the computer program product can enable the computer to implement the operations performed by the network device and/or the terminal device in any one of the possible implementation manners of the method embodiments and the method embodiments.

Based on the same concept as the method embodiments, the present application further provides a chip or a chip system, where the chip is coupled to a transceiver and is used to implement the operations executed by the network device and/or the terminal device in any possible implementation manner of the method embodiments and the method embodiments. The chip system may include the chip, as well as components including memory, communication interfaces, and the like.

Based on the same concept as the method embodiments, the present application further provides a communication system, which may be used to implement the operations performed by the network device and/or the terminal device in any one of the possible implementations of the method embodiments and the method embodiments. Illustratively, the communication system has a structure as shown in fig. 1.

Taking the communication system shown in fig. 1 as an example, the network device 101 and the terminal device 102 may be used to implement the communication method shown in fig. 2 or fig. 8.

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

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

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

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

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

A method of communication, comprising:

determining first information indicating a plurality of quasi co-located QCL parameters for demodulating reference signal DMRS ports on a first resource;

sending the first information to a terminal device;

and transmitting the DMRS through the DMRS port.
The method of claim 1, wherein said plurality of QCL parameters includes:

a plurality of first QCL parameters; or,

a plurality of first QCL parameters and one or more second QCL parameters.
The method of claim 2, wherein said first QCL parameters include one or more of the following parameters: doppler frequency offset, doppler spread, delay spread, average delay.
The method of claim 2 or 3, wherein said second QCL parameters include spatial receive parameters or spatial receive beamforming parameters.
The method of any of claims 1-4, wherein said first information comprises a Transmission Control Indication (TCI) status information, said TCI status information indicating said plurality of QCL parameters.
The method of claim 5, wherein the method further comprises:

and sending second information to the terminal equipment, wherein the second information is used for indicating the corresponding relation between the TCI state and the QCL parameters, and the TCI state information is used for indicating one TCI state.
The method of claim 5 or 6, wherein the plurality of QCL parameters includes a plurality of first QCL parameters and a plurality of second QCL parameters, the method further comprising:

transmitting third information to the terminal device, the third information indicating a correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters.
The method of any of claims 2-4, wherein the first information comprises a plurality of TCI status information, one of the plurality of TCI status information for indicating one of the plurality of first QCL parameters.
The method of any of claims 2-8, wherein said first information is indicative of one or more first downlink reference signals associated with said plurality of first QCL parameters.
The method of claim 9, wherein at least one of the one or more first downlink reference signals is associated with the one or more second QCL parameters; or,

the first information is used to indicate one or more second downlink reference signals associated with the one or more second QCL parameters.
A method of communication, comprising:

receiving first information from a network device, the first information indicating a plurality of QCL parameters of a DMRS port on a first resource;

and receiving the DMRS through the DMRS port according to the first information.
The method of claim 11, wherein said plurality of QCL parameters includes:

a plurality of first QCL parameters; or,

a plurality of first QCL parameters and one or more second QCL parameters.
The method of claim 12, wherein said first QCL parameters include one or more of the following parameters: doppler frequency offset, doppler spread, delay spread, average delay.
The method of claim 12 or 13, wherein said second QCL parameters comprise spatial receive parameters or spatial receive beamforming parameters.
The method of any of claims 11-14, wherein said first information comprises a TCI status information, said TCI status information indicating said plurality of QCL parameters.
The method of claim 15, wherein the method further comprises:

receiving second information from the network device, where the second information is used to indicate a correspondence between a TCI status and a QCL parameter, and the TCI status information is used to indicate one of the TCI statuses.
The method of claim 15 or 16, wherein the plurality of QCL parameters comprises a plurality of first QCL parameters and a plurality of second QCL parameters, the method further comprising:

transmitting third information to the terminal device, the third information indicating a correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters.
The method of any of claims 12-14, wherein the first information comprises a plurality of TCI status information, one of the plurality of TCI status information for indicating one of the plurality of first QCL parameters.
The method of any of claims 12-18, wherein the first information is indicative of a plurality of first downlink reference signals, the one or more first downlink reference signals being associated with the plurality of first QCL parameters.
The method of claim 19, wherein at least one of the plurality of first downlink reference signals is associated with the one or more second QCL parameters; or,

the first information is used to indicate one or more second downlink reference signals associated with the one or more second QCL parameters.
A communications apparatus, comprising:

a transceiver for the communication device to communicate;

a processor for executing program instructions stored in a memory for performing the method of any of claims 1-10.
A communications apparatus, comprising:

a transceiver for the communication device to communicate;

a processor for executing program instructions stored in a memory to perform the method of any of claims 11-20.
A communication system comprising a communication apparatus according to claim 21 and comprising a communication apparatus according to claim 22.
A computer-readable storage medium comprising program instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-20.
A computer program product, which when executed causes the method of any of claims 1-20 to be implemented.
A chip comprising a processor for executing program instructions stored in a memory to perform the method of any of claims 1-20.