WO2021164023A1 - Communication method and apparatus - Google Patents

Abstract

Disclosed in the present application are a communication method and apparatus, used for improving the transmission performance of data. According to the present application, a network device may configure, for a terminal device, a plurality of QCL parameters of a DMRS port associated with a first resource. Therefore, on the first resource, the terminal device may obtain an equivalent QCL parameter according to the plurality of QCL parameters; the equivalent QCL parameter may accurately reflect a channel state, and therefore, channel estimation is performed on the DMRS port according to the equivalent QCL parameter, and data is received according to the structure of the channel estimation, thereby improving robustness of data reception on the first resource.

Description

Communication method and device Technical field

This application relates to the field of communication, and in particular to a communication method and device.

Background technique

Currently, the base station indicates the transmission control indication (TCI) state (transmission control indication, TCI) adopted by the currently scheduled data channel through signaling. Each TCI state includes a quasi co-location (QCL) relationship (QCL relationship) between a demodulation reference signal (demodulation reference signal, DMRS) port and a reference signal port. Based on the QCL relationship, the base station can indicate the QCL parameters to the terminal device so that the terminal device can receive the DMRS. For example, the base station pre-issues one or more reference signals, the terminal device determines QCL parameters through one or more reference signal ports, and through the determined QCL parameters, the terminal device receives the DMRS port signal for data demodulation.

At present, the receiving performance of DMRS needs to be improved. For example, in high-speed mobile scenarios such as high-speed rail, because the channel has large time-varying characteristics, and there is a delay in channel measurement, the success rate of DMRS reception decreases, resulting in impaired data transmission performance.

Summary of the invention

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

In the first aspect, this application provides a communication method. This method can be executed by a network device or a chip in the network device. Among them, the network equipment is a wireless access network equipment such as a base station.

According to this method, the network device can determine (or obtain) and send the first information to the terminal device. Wherein, the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource. The network device can also send DMRS through the DMRS port.

Using the above method, the network device can configure the terminal device with multiple QCL parameters associated with the DMRS port of the first resource. Therefore, on the first resource, the terminal device can obtain an equivalent QCL parameter based on multiple QCL parameters. The equivalent QCL parameter can accurately reflect the channel state, thereby performing channel estimation on the DMRS port based on the equivalent QCL parameter, and according to the channel The estimated structure performs data reception to improve the robustness of data reception on the first resource.

The multiple QCL parameters of the above DMRS port may include multiple first QCL parameters (such as parameters corresponding to QCL type A), or multiple first QCL parameters and one or more second QCL parameters (such as QCL type D corresponding parameters). parameter). Wherein, the first QCL parameter includes 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 a possible example, the first information may include TCI status information. The one TCI status information can be used to indicate multiple QCL parameters.

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

If the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the network device may also send third information to the terminal device. The third information is used to indicate the correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device can associate the first QCL with the second QCL parameter, so as to perform the channel according to the associated QCL parameter estimate.

Optionally, the agreement stipulates the correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters. In addition, the first information may include multiple TCI status information, where one of the multiple TCI status information is used to indicate one of the multiple first QCL parameters. Specifically, any one of the multiple TCI status information may indicate one of the multiple first QCL parameters, or each TCI status information of the multiple TCI status information indicates one of the multiple first QCL parameters one.

In addition, the first information may be specifically used to indicate one or more first downlink reference signals, and 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 have the same first QCL parameter. In other words, one or more first downlink reference signals and DMRS are QCL under the first QCL parameter. In addition, 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, and the one or more second downlink reference signals may be associated with one or more second QCL parameters. Specifically, the one or more second downlink reference signals and the DMRS have the same second QCL parameters, so one or more second downlink reference signals may also pass the second QCL parameters. In other words, one or more second downlink reference signals and DMRS are QCL under the second QCL parameter.

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

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

In the second aspect, this application provides a communication method. The method can be executed by a terminal device or a chip in the terminal device.

According to this method, the terminal device can receive the first information from the network device, and the first information is used to indicate a plurality of QCL parameters of the DMRS port on the first resource. The terminal device can receive the DMRS through the DMRS port according to the first information.

The multiple QCL parameters of the above DMRS port may include multiple first QCL parameters (such as parameters corresponding to QCL type A), or multiple first QCL parameters and one or more second QCL parameters (such as QCL type D corresponding parameters). parameter). Wherein, the first QCL parameter includes 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 a possible example, the first information may include TCI status information. The one TCI status information can be used to indicate multiple QCL parameters.

Exemplarily, the terminal device may also receive second information sent from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. The TCI state may include one or more TCI states, the QCL parameter may include one or more QCL parameters, and the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states One or more of the QCL parameters correspond. One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information.

If the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the terminal device can also receive from the network device. The third information is used to indicate the correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device can associate the first QCL with the second QCL parameter, so as to perform the channel according to the associated QCL parameter estimate.

If the multiple QCL parameters include multiple first QCL parameters, the first information may include multiple TCI status information, where one of the multiple TCI status information can be used to indicate one of the multiple first QCL parameters.

In addition, the first information may be specifically used to indicate one or more first downlink reference signals, and 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 have the same first QCL parameter. In other words, one or more first downlink reference signals and DMRS are QCL under the first QCL parameter. In addition, 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, and the one or more second downlink reference signals may be associated with one or more second QCL parameters. Specifically, the one or more second downlink reference signals and the DMRS have the same second QCL parameters, so one or more second downlink reference signals may also pass the second QCL parameters. In other words, one or more second downlink reference signals and DMRS are QCL under the second QCL parameter.

For the beneficial effects of the communication method shown in the second aspect above, reference may be made to the description of the beneficial effects in the communication method shown in the first aspect, which will not be repeated here.

In the third aspect, an embodiment of the present application provides a communication method. This method can be executed by a network device or a chip in the network device. Among them, the network equipment is a wireless access network equipment such as a base station.

According to this method, the network device can determine (or obtain) and send the first information to the terminal device. The first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports. Wherein, each group of DMRS ports in the multiple groups of DMRS ports corresponds to one of multiple QCL parameters, and each group of DMRS ports includes at least one DMRS port. The network device may also send a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.

Using the above method, the network device can configure multiple QCL parameters associated with multiple groups of DMRS ports to the terminal device, and multiple 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 multiple DMRS ports according to multiple DMRS ports for one PDSCH port, and perform operations such as combining and averaging the multiple channel estimation results for the data layer reception of the PDSCH port to improve Channel estimation performance.

The multiple QCL parameters of the above DMRS port may include multiple first QCL parameters (such as parameters corresponding to QCL type A), or multiple first QCL parameters and one or more second QCL parameters (such as QCL type D corresponding parameters). parameter). Wherein, the first QCL parameter includes 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 a possible example, the first information may include one TCI status information, and the one TCI status information can be used to indicate the multiple QCL parameters.

Exemplarily, the network device may also send second information, where the second information is used to indicate the corresponding relationship between the TCI status and the QCL parameter. The TCI state may include one or more TCI states, the QCL parameter may include one or more QCL parameters, and the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states One or more of the QCL parameters correspond. One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information.

If the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the network device may also send third information to the terminal device. The third information may be used to indicate the correspondence between the multiple first QCL parameters and the multiple second QCL parameters, so that the terminal device associates the first QCL and the second QCL parameters, so as to perform channel estimation according to the associated QCL parameters.

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

In addition, the first information may be specifically used to indicate a plurality of first downlink reference signals, and the plurality of first downlink reference signals are associated with the plurality of first QCL parameters. Specifically, the multiple first downlink reference signals and the DMRS have the same first QCL parameter. In other words, the multiple first downlink reference signals and DMRS are QCL under the first QCL parameter. In addition, 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, and the one or more second downlink reference signals may be associated with one or more second QCL parameters. Specifically, the one or more second downlink reference signals and the DMRS have the same second QCL parameters, so one or more second downlink reference signals may also pass the second QCL parameters. In other words, one or more second downlink reference signals and DMRS are QCL under the second QCL parameter.

In the fourth aspect, this application provides a communication method. The method can be executed by a terminal device or a chip in the terminal device.

According to this method, the terminal device can receive the first information from the network device. The first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports. Wherein, each group of DMRS ports in the multiple groups of DMRS ports corresponds to one of multiple QCL parameters, and each group of DMRS ports includes at least one DMRS port. It is known that the device can also receive the PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.

The multiple QCL parameters of the above DMRS port may include multiple first QCL parameters (such as parameters corresponding to QCL type A), or multiple first QCL parameters and one or more second QCL parameters (such as QCL type D corresponding parameters). parameter). Wherein, the first QCL parameter includes 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 a possible example, the first information may include one TCI status information, and the one TCI status information can be used to indicate the multiple QCL parameters.

Exemplarily, the terminal device may receive second information from the network device, where the second information is used to indicate the corresponding relationship between the TCI state and the QCL parameter. The TCI state may include one or more TCI states, the QCL parameter may include one or more QCL parameters, and the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states One or more of the QCL parameters correspond. One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information.

If the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the terminal device may receive the third information from the network device. The third information may be used to indicate the correspondence between the multiple first QCL parameters and the multiple second QCL parameters, so that the terminal device associates the first QCL and the second QCL parameters, so as to perform channel estimation according to the associated QCL parameters.

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

In addition, the first information may be specifically used to indicate a plurality of first downlink reference signals, and the plurality of first downlink reference signals are associated with the plurality of first QCL parameters. Specifically, the multiple first downlink reference signals and the DMRS have the same first QCL parameter. In other words, the multiple first downlink reference signals and DMRS are QCL under the first QCL parameter. In addition, 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, and the one or more second downlink reference signals may be associated with one or more second QCL parameters. Specifically, the one or more second downlink reference signals and the DMRS have the same second QCL parameters, so one or more second downlink reference signals may also pass the second QCL parameters. In other words, one or more second downlink reference signals and DMRS are QCL under the second QCL parameter.

For the beneficial effects of the communication method shown in the fourth aspect above, reference may be made to the description of the beneficial effects in the communication method shown in the third aspect, which will not be repeated here.

In the fifth aspect, this application provides a communication device. The communication device can be used to implement the functions involved in the first aspect or any one of the possible designs of the first aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions or method steps or operations in the above-mentioned first aspect and any of its designs. Specifically, the communication device may be a terminal device or a chip in a terminal device.

In a possible example, the communication device may include a communication module (or called a communication unit) and a processing module (or called a processing unit). Wherein, the communication module can be used for the communication device to communicate, and the processing module can be used for the communication device to realize the processing function of the communication device.

When the method shown in the first aspect is executed, the processing module may be used to determine the first information. Wherein, the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource. The communication module can be used to send the first information to the terminal device. The communication module can also be used to send DMRS through the DMRS port. For the implementation of the above first information, refer to the description of the first information in the first aspect.

Exemplarily, the communication module may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information in the first aspect.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the communication module may also be used to send third information to the terminal device. For the implementation of the third information, refer to the description of the third information in the first aspect.

In another possible example, the communication device may include a processor (or a processing chip or a processing circuit) and a transceiver (or a communication circuit). The processor can be used to call program instructions to perform the processing functions of the communication device. The communication module can be used for communication with the communication device. Wherein, the program instructions may be stored in the memory, and the memory may be used as a part of the communication device, and the communication device may also include a memory; or, the memory may be externally connected to the communication device and connected to the processor and/or transceiver.

When the method shown in the first aspect is executed, the processor may be used to determine the first information. Wherein, the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource. The transceiver can be used to send the first information to the terminal device. The transceiver can also be used to send DMRS through the DMRS port. For the implementation of the above first information, refer to the description of the first information in the first aspect.

Exemplarily, the transceiver may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information in the first aspect.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the communication module may also be used to send third information to the terminal device. For the implementation of the third information, refer to the description of the third information in the first aspect.

In the sixth aspect, this application provides a communication device. The communication device can be used to implement the above-mentioned second aspect or the functions involved in any possible design of the second aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions or method steps or operations in the second aspect and any of its designs. Specifically, the communication device may be a network device or a chip in a network device.

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

When the method shown in the second aspect is executed, the communication module may be used to receive first information from the network device, and the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource. The communication module can also be used to receive DMRS through the DMRS port. For the implementation of the above first information, refer to the description of the first information in the second aspect.

Exemplarily, the communication module may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information in the second aspect.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the communication module may also be used to receive third information from the network device. For the implementation of the third information, refer to the description of the third information in the second aspect.

In another possible example, the communication device may include a processor (or a processing chip or a processing circuit) and a transceiver (or a communication circuit). The processor can be used to call program instructions to perform the processing functions of the communication device. The communication module can be used for communication with the communication device. Wherein, the program instructions may be stored in the memory, and the memory may be used as a part of the communication device, and the communication device may also include a memory; or, the memory may be externally connected to the communication device and connected to the processor and/or transceiver.

When the method shown in the second aspect is executed, the transceiver may be used to receive first information from the network device, and the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource. The transceiver can also be used to receive DMRS through the DMRS port. For the implementation of the above first information, refer to the description of the first information in the second aspect.

Exemplarily, the transceiver may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information in the second aspect.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the transceiver may also be used to receive third information from the network device. For the implementation of the third information, refer to the description of the third information in the second aspect.

In a seventh aspect, the present application provides a communication device. The communication device can be used to implement the functions involved in the third aspect or any one of the possible designs of the third aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions or method steps or operations in the above third aspect and any of its designs. Specifically, the communication device may be a terminal device or a chip in a terminal device.

In a possible example, the communication device may include a communication module (or called a communication unit) and a processing module (or called a processing unit). Wherein, the communication module can be used for the communication device to communicate, and the processing module can be used for the communication device to realize the processing function of the communication device.

When the method shown in the third aspect is executed, the processing module may be used to determine the first information. The first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports. The communication module can be used to send the first information to the terminal device. The communication module can also be used to send PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. For the implementation of the first information, refer to the description of the first information in the third aspect.

Exemplarily, the communication module may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information in the third aspect.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the communication module may also be used to send third information to the terminal device. For the implementation of the third information, refer to the description of the third information in the third aspect.

In another possible example, the communication device may include a processor (or a processing chip or a processing circuit) and a transceiver (or a communication circuit). The processor can be used to call program instructions to perform the processing functions of the communication device. The communication module can be used for communication with the communication device. Wherein, the program instructions may be stored in the memory, and the memory may be used as a part of the communication device, and the communication device may also include a memory; or, the memory may be externally connected to the communication device and connected to the processor and/or transceiver.

When executing the method shown in the third aspect, the processor may be used to determine the first information. The first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports. The transceiver can be used to send the first information to the terminal device. The transceiver can also be used to transmit the PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. For the implementation of the first information, refer to the description of the first information in the third aspect.

Exemplarily, the transceiver may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information in the third aspect.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the transceiver may also be used to send third information to the terminal device. For the implementation of the third information, refer to the description of the third information in the third aspect.

In an eighth aspect, this application provides a communication device. The communication device can be used to implement the functions involved in the fourth aspect or any one of the possible designs of the fourth aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions or method steps or operations in the fourth aspect and any one of its designs. Specifically, the communication device may be a network device or a chip in a network device.

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

When performing the method shown in the fourth aspect, the communication module may be used to receive first information from the network device, and the first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports. The communication module can also be used to receive the PDSCH through the DMRS port, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. For the implementation of the above first information, please refer to the description of the first information in the second aspect.

Exemplarily, the communication module may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information in the second aspect.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the communication module may also be used to receive third information from the network device. For the implementation of the third information, refer to the description of the third information in the second aspect.

In another possible example, the communication device may include a processor (or a processing chip or a processing circuit) and a transceiver (or a communication circuit). The processor can be used to call program instructions to perform the processing functions of the communication device. The communication module can be used for communication with the communication device. Wherein, the program instructions may be stored in the memory, and the memory may be used as a part of the communication device, and the communication device may also include a memory; or, the memory may be externally connected to the communication device and connected to the processor and/or transceiver.

When the method shown in the fourth aspect is executed, the transceiver may be used to receive first information from the network device, and the first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports. The transceiver can also be used to receive the PDSCH through the DMRS port, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. For the implementation of the above first information, refer to the description of the first information in the second aspect.

Exemplarily, the transceiver may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information in the second aspect.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the transceiver may also be used to receive third information from the network device. For the implementation of the third information, refer to the description of the third information in the second aspect.

In a ninth aspect, this application provides a communication system. Exemplarily, the communication system may include a communication device for implementing any possible design of the foregoing first aspect or the first aspect, and a communication device for implementing any possible design of the foregoing second aspect or the second aspect. Communication device. Alternatively, the communication system may include a communication device for implementing any possible design of the third aspect or the third aspect, and a communication device for implementing any possible design of the fourth aspect or the fourth aspect. . Specifically, the communication system may include the communication device of the fifth aspect and the communication device of the sixth aspect. Alternatively, the communication system may include the communication device of the seventh aspect and the communication device of the eighth aspect.

In a possible example, the communication system may include a network device and a terminal device, so as to implement the methods shown in the foregoing first aspect and the foregoing second aspect.

The network device can be used to determine (or obtain) and send the first information to the terminal device. The first information may be used to indicate multiple QCL parameters of the DMRS port on the first resource. Correspondingly, the terminal device can receive the first information. The network device can also send DMRS through the DMRS port. Accordingly, the terminal device can receive the DMRS.

In another possible example, the communication system may include a network device and a terminal device, so as to implement the methods shown in the foregoing third aspect and the foregoing fourth aspect.

The network device can be used to determine (or obtain) and send the first information to the terminal device. The first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports. Correspondingly, the terminal device can receive the first information. The network device may also send a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. Correspondingly, the terminal device can receive the PDSCH.

In a tenth aspect, this application provides a computer storage medium, including program instructions. When the program instructions are used on a computer, the computer executes any possible design of the first aspect or the first aspect, or the second Any one of the possible designs of the aspect or the second aspect, or any one of the possible designs of the aforementioned third aspect or the third aspect, or any one of the possible designs of the aforementioned fourth aspect or the fourth aspect.

In an eleventh aspect, an embodiment of the present application provides a computer program product, which when running on a computer, causes the computer to execute any possible design of the first aspect or the first aspect, or the second or second aspect described above. Any one of the possible designs of the aspect, or any one of the possible designs of the above-mentioned third aspect or the third aspect, or any one of the above-mentioned methods of the fourth aspect or the fourth aspect of the possible design.

In a twelfth aspect, an embodiment of the present application provides a system chip, which may include a processor, and may also include a memory (or the system chip is coupled to the memory), and the system chip executes the program instructions in the memory to Implementation of any possible design of the first aspect or the first aspect, or any possible design of the second or second aspect, or any possible design of the third aspect or the third aspect, or the foregoing The fourth aspect or any one of the possible design methods of the fourth aspect. Wherein, coupling refers to that two components are directly or indirectly combined with each other, for example, coupling may refer to electrical connection between two components.

Description of the drawings

FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of this application;

FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 3 is a schematic diagram of the application of a communication method provided by an embodiment of this application;

4 is a schematic diagram of the application of another communication method provided by an embodiment of this application;

FIG. 5 is a schematic diagram of the application of another communication method provided by an embodiment of this application;

FIG. 6 is a schematic diagram of the application of another communication method provided by an embodiment of this application;

FIG. 7 is a schematic diagram of the application of another communication method provided by an embodiment of this application;

FIG. 8 is a schematic diagram of the application of another communication method provided by an embodiment of this application;

FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 12 is a schematic structural diagram of another communication device provided by an embodiment of this application.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The specific operation method in the method embodiment can also be applied to the device embodiment or the system embodiment.

As shown in FIG. 1, the wireless communication system 100 provided by the embodiment of the present application includes a terminal device 101 and a network device 102. The application scenarios of the wireless communication system 100 include, but are not limited to, the new radio (NR) system in the 5th generation (5G) mobile communication system of the long term evolution (LTE) system and the future mobile communication System and so on.

Exemplarily, the terminal device 101 may be a terminal (terminal), a mobile station (mobile station, MS), a mobile terminal (mobile terminal), etc., or a chip, a chip system and other devices. The terminal device 101 can be connected to one or more One or more network devices of the communication system communicate and accept network services provided by the network devices. The network devices here include but are not limited to the network device 102 shown in the figure. For example, the terminal device 101 in the embodiment of the present application may be a mobile phone (or called a "cellular" phone), a computer with a mobile terminal, etc., and the terminal device 101 may also be portable, pocket-sized, handheld, or a built-in computer. , Or on-board mobile devices. The terminal device 101 may also be a communication chip with a communication module. It should be understood that the terminal device 101 may be configured to support communication with a network device through a universal user to network interface (Uu air interface).

The terminal device 101 shown above may be a user equipment (UE), a terminal (terminal), an access terminal, a terminal unit, a terminal station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile terminal ( mobile terminal), wireless communication equipment, terminal agent or terminal equipment, etc. The terminal device can have a wireless transceiver function, which can communicate with one or more network devices of one or more communication systems (such as wireless communication), and accept network services provided by the network devices. The network devices here include but are not limited to The network device 102 is shown.

The terminal device 101 can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, and Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or terminal devices in the future evolved PLMN network, etc.

In addition, the terminal device 101 can be deployed on the land, including indoor or outdoor, handheld or vehicle-mounted; the terminal device can also be deployed on the water (such as ships, etc.); the terminal device 101 can also be deployed in the air (such as airplanes, balloons, and satellites). Wait). The terminal device 101 may specifically be a mobile phone, a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, and an industrial control (industrial control) terminal. Wireless terminals in ), wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, and wireless terminals in transportation safety , Wireless terminals in smart cities, wireless terminals in smart homes, etc. The terminal device may also be a communication chip with a communication module, a vehicle with a communication function, or a vehicle-mounted device (such as a vehicle-mounted communication device, a vehicle-mounted communication chip), and so on.

The network device 102 may be an access network device (or called an access website point). Among them, the access network equipment refers to equipment that provides network access functions, such as a radio access network (RAN) base station and so on. The network device 102 may specifically include a base station (base station, BS), or include a base station and a radio resource management device for controlling the base station, and so on. The network device 102 may also include a relay station (relay device), an access point, and a base station in a future 5G network, a base station in a future evolved PLMN network, or an NR base station, 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 this application, the network device 102 may support Uu interface communication.

For example, the network equipment 102 includes but is not limited to: next-generation base stations (gnodeB, gNB) in 5G, evolved node B (evolved node B, eNB) in LTE system, radio network controller (RNC) , The wireless controller under the CRAN system, base station controller (BSC), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseband unit, BBU), transmission receiving point ( transmitting and receiving point (TRP), transmitting point (TP) or mobile switching center, etc. The network device 102 may also include a base station in a future 6G or newer mobile communication system.

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

Based on the architecture shown in Figure 1, the network device 102 can indicate to the terminal device 101 the time-frequency position of the currently scheduled physical uplink shared channel (PDSCH). In addition, the network device 102 can also use the downlink control information (downlink control). information (DCI) indicates to the terminal device 101 the TCI state adopted by the demodulation reference signal (Demodulation Reference Signal, DMRS) port of the currently scheduled PDSCH. For example, as shown in Table 1, the DCI can carry a TCI indication field to indicate the corresponding TCI status. Among them, each TCI state includes the quasi co-location relationship between the DMRS port and the reference signal port. The quasi co-location relationship between the DMRS port and the reference signal port included in each TCI state can be controlled by the radio resource control (RRC) and or media access control (MAC) control unit (control). element, CE) or DCI and other signaling configuration. Specifically, the network device 102 may configure the type of quasi co-location and the index value of the reference signal under this type. The configuration information indicates that under the type of quasi co-location, the reference signal and the DMRS port have a quasi co-location association relationship, In other words, the quasi co-location of the DMRS port can be obtained based on the reference signal. For example, when the configuration information is configured with quasi co-location type A, the reference signal ID1 and the DMRS port have a quasi co-location association relationship, and when the quasi co-location type D is configured, the reference signal ID2 and the DMRS port have a quasi co-location association relationship, then The terminal device 101 may receive the DMRS according to the quasi co-location parameter under the quasi co-location type A and the quasi co-location parameter under the quasi co-location type D obtained by the reference signal ID1.

Wherein, the DMRS port of the data channel and the reference signal port meet the QCL relationship (or said, the DMRS and the one or more reference signals meet the QCL relationship). For example, the reference signal configured by the configuration information may be a channel state information reference signal (channel state information reference signal, CSI-RS), a tracking reference signal (tracking reference signal, TRS), or a cell common reference signal, and so on. It is understandable that the same ports are used for PDSCH and DMRS, which means that the DMRS port and the PDSCH port have a one-to-one correspondence, and each PDSCH port adopts the QCL hypothesis corresponding to the corresponding DMRS port.

TCI indicator field Corresponding meaning 000 TCI status 1 001 TCI status 2 … … 111 TCI status 7

Table 1 TCI indication field in DCI

Among them, each field value shown in Table 1 may indicate a TCI state, and each TCI state may indicate a quasi co-location relationship between a DMRS port and at least one reference signal port. The types of quasi co-location relationships (hereinafter referred to as QCL types) include QCLtypeA, QCL type B, QCL type C, and QCL type D. Among them, the QCL parameters (or QCL assumptions) corresponding to QCL type A include Doppler shift, Doppler spread, delay spread, and average delay. . QCL parameters corresponding to QCL type B include Doppler frequency offset and Doppler spread, and QCL parameters corresponding to QCL type C include Doppler frequency offset and average delay. QCL parameters corresponding to QCL type D include spatial reception parameters (spatial Rx parameters) of the DMRS port or spatial reception beamforming parameters.

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 based on The reference signal port 1 is determined. For example, the terminal device 101 first performs signal processing according to the reference signal port 1 to determine the relevant parameters included in QCL type A, then the above parameters of the DMRS port and the above parameter system of the reference signal port, or have a corresponding relationship . In addition, if there is a QCL type D relationship between the DMRS port and the reference signal port, the spatial reception parameter or spatial reception beamforming parameter of the DMRS port is determined according to the reference signal port. It should be understood that the respective received beam information of multiple reference signals that satisfy the QCLtype D relationship are the same, and the received beams of the data channel and the DMRS are the same, that is, the received beams based on the QCL relationship and the reference signal Information, the terminal device 101 can infer the receiving beam used to receive the data channel and the DMRS.

In the prior art, the DMRS port and the PDSCH port or layer are consistent or in one-to-one correspondence. That is, the number of ports or layers of the PDSCH is equal to the number of DMRS ports, and each port or each layer of the PDSCH corresponds to a DMRS port in turn. The terminal device 101 can obtain the channel estimation result according to the DMRS port and use it for the corresponding PDSCH port or layer. Data reception. Then the QCL parameters of the above DMRS port are also applicable to the corresponding PDSCH. The DMRS port is used to define the physical resources that carry the DMRS on the network side. A DMRS port can correspond to a specific time-frequency code domain resource in the network and a DMRS of a specific channel. For example, DMRS port 0 can occupy odd-numbered sub-carriers in the network, DMRS port 1 can occupy even-numbered sub-carriers in the network, and DMRS port 2 can also occupy even-numbered sub-carriers in the network, but it uses different code domain resources from DMRS port 1. DMRS port 0 can be used for PDSCH channel estimation, DMRS port 1000 can be used for PDCCH channel estimation, etc.

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

At present, the above scheme of configuring the TCI state and receiving DMRS according to the TCI state can be used in a variety of communication scenarios.

The embodiment of the present application provides a communication method for improving data transmission performance. It should be understood that this method can be applied to high-speed mobile communication scenarios such as high-speed rail. However, this application does not limit the application of the communication method to mobile communication scenarios other than high-speed mobile communication scenarios.

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

S101: The network device determines the first information. In other words, the network device obtains the first information.

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

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

It should be understood that the first resource may be a specific time-frequency domain resource, for example, the first resource is N resource clocks (resource clock, RB) in the frequency domain and N OFDM symbols in the time domain or one of the time domains. Time slot. The first resource may be determined according to the DCI signaling where the first information is located.

In a possible implementation manner, all DMRS ports carried on the first resource adopt the multiple QCL parameters. For example, if the first resource includes the first RB and the second RB, the DMRS ports on the first RB and the second RB both use multiple QCL parameters. For another example, the first resource includes the first DMRS port and the second DMRS port. , The first DMRS port and the second DMRS port both use multiple QCL parameters.

It should be understood that the QCL parameter of the DMRS port is used to indicate the QCL assumption used in channel estimation through the DMRS, and the channel estimation performance of the terminal device can be improved by indicating the QCL parameter to the terminal device.

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

In another possible implementation manner, the DMRS port corresponds to the physical downlink control channel PDCCH, that is, the DMRS can 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.

Correspondingly, the terminal device receives the first information.

S103: The network device sends a DMRS through the DMRS port.

Using the above method, the network device can configure the terminal device with multiple QCL parameters associated with the DMRS port of the first resource. Therefore, on the first resource, the terminal device can obtain an equivalent QCL parameter based on multiple QCL parameters. The equivalent QCL parameter can accurately reflect the channel state, thereby performing channel estimation on the DMRS port based on the equivalent QCL parameter, and according to the channel The estimated structure performs data reception to improve the robustness of data reception on the first resource.

It should be understood that according to the method shown in FIG. 2, the terminal device 101 can obtain multiple QCL parameters from the network device 102, where the multiple QCL parameters correspond to the DMRS port on the first resource. For example, if the number of multiple QCL parameters is n and n is a positive integer, the channel H through which the terminal device 101 actually receives the DMRS port signal can be expressed as H1+H2+...+Hn, where H1 is determined according to the first QCL parameter Channel, the channel determined by H2 according to the second QCL parameter, and so on. The filter coefficients can be obtained by synthesizing the n QCL parameters, and then the filter coefficients obtained by the synthesis and the obtained channels can be calculated to obtain the channel estimation result, which can be used for corresponding data reception. For another example, if the number of multiple QCL parameters is n and n is a positive integer, the terminal device 101 can determine the equivalent QCL parameters based on the n QCL parameters, and then the filter coefficients and frequency offset values used in channel estimation based on the DMRS Or the delay value can be determined according to the equivalent QCL parameter.

Exemplarily, the above multiple QCL parameters include multiple first QCL parameters, or multiple 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 or QCL type B or QCL type A. The second QCL parameter is the QCL parameter corresponding to QCL type D. Exemplarily, the first QCL parameter includes Doppler frequency offset, Doppler spread, delay spread, and average delay. The second QCL parameters include spatial reception parameters or spatial reception beamforming parameters.

In a possible implementation manner, one DMRS port has multiple QCL parameters of QCL type A and one QCL parameter of QCL type D. At this time, the terminal device can use a receiving beam to receive the DMRS on the DMRS port, and determine an equivalent Doppler based on multiple Doppler frequency deviation, Doppler spread, delay spread, and average delay parameters. Frequency offset, Doppler spread, delay spread, and average delay parameters are used for channel estimation of DMRS. Therefore, high-precision channel estimation in PDSCH transmission based on a single frequency network (SFN) in a high frequency scenario can be supported.

It should be understood that, among the multiple 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 multiple QCL parameters may include RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter. RS ID1 under the first QCL parameter is used to indicate the first QCL parameter represented by RS ID1, The RS ID2 under the QCL parameter is used to indicate 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 value or different values. Wherein, RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter may both include parameters such as Doppler frequency offset, Doppler spread, delay spread, and average delay. The value of each parameter in RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter may be the same or different. For example, the Doppler frequency offset included in RS ID1 under the first QCL parameter is the same as that of the first QCL. The Doppler frequency offset included in the RS ID2 under the parameters may be the same or different.

In a possible example of the communication method shown in the embodiment of the present application, the first information includes TCI status information. The TCI status information is used to indicate the multiple QCL parameters. For example, as shown in Table 1, each TCI indicator field can be regarded as a TCI indicator field, which is used to indicate multiple first QCL parameters. Wherein, the TCI state information may correspond to one of the one or more TCI states configured by the network device 102 to the terminal device 101.

Exemplarily, the network device 102 may send the second information to the terminal device 101 to indicate the corresponding relationship between the TCI state and the QCL parameter. The TCI state may include one or more TCI states, the QCL parameter may include one or more QCL parameters, and the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states One or more of the QCL parameters correspond. One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information. The second information may be indicated by signaling such as RRC, MAC CE, or DCI. The corresponding relationship can be shown in Table 2. Specifically, the network device can configure the QCL type (ie QCL parameter) included in each TCI state and the reference signal ID included in each QCL type. The TCI state is used to indicate the quasi co-location between the DMRS port and the reference signal. relation. 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 parameters corresponding to RS ID 1 are the first QCL parameters under the first QCL parameter. The RS ID 1.

Table 2

It can be seen that each TCI state in Table 2 can correspond to multiple QCL parameters. After the terminal device 101 determines the TCI status information according to the first information, it can query Table 2 to determine the multiple 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 can 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.

In addition, in this example, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the network device 102 may also send the third information to the terminal device 101. The third information may be used to indicate the corresponding relationship between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device 101 associates the first QCL with the second QCL parameter, so as to perform processing according to the associated QCL parameter Channel estimation. For example, for TCI status 3 in Table 2, the network device also needs to configure RS ID5 under the first QCL parameter and RS ID2 under the second QCL parameter to have an association relationship, RS ID6 under the first QCL parameter and second QCL parameter The RS ID3 under the RS ID3 has an association relationship. Based on the third information, the terminal device can use the receiving beam corresponding to the RS ID2 under the second QCL parameter to receive the DMRS signal, and according to the associated RS ID5 under the first QCL parameter and the The DMRS signal determines the channel estimation result 1. In addition, the terminal device may use the receiving beam corresponding to the RS ID3 under the second QCL parameter to receive the DMRS signal, and determine the channel estimation result 2 according to the associated RS ID6 under the first QCL parameter and the DMRS signal. After that, the terminal device can receive the PDSCH according to the channel estimation result 1 and the channel estimation result 2. The above third information can 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.

Optionally, the corresponding relationship between the multiple first QCL parameters and the multiple second QCL parameters can be predefined. For example, the corresponding relationship is determined according to the order of parameter configuration, and the configuration sequence numbers of the multiple first QCL parameters are from small to large. Corresponding to multiple second QCL parameters with configuration numbers from small to large in sequence.

Optionally, the terminal device 101 determines to use an advanced receiving algorithm to receive the PDSCH 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 realize the synthesis of the QCL parameters according to its own algorithm, and adopt the synthesized QCL parameters receive DMRS and corresponding data channels.

Optionally, when the TCI state indicated by the DCI or the TCI state configured by the RRC has at least one TCI state configured with at least two QCL parameters of the same type, the reception start time of the DMRS and the corresponding data channel and the reception of the DCI are terminated The time interval between moments is t1; when there is only one QCL parameter of the same type configured in each TCI state indicated by DCI or all TCI states configured by RRC, the reception of DMRS and the corresponding data channel starts The time interval between the time and the DCI reception termination time is t2. Among them, t1 can be greater than t2.

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

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

For example, if the multiple QCL parameters include multiple first QCL parameters, one of the multiple TCI status information may be used to indicate one first QCL parameter. In this example, the network device 102 may send the second information to the terminal device 101 to indicate the corresponding relationship between the TCI state and the QCL parameter, 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 status and QCL parameters is shown in Table 3. The first information is specifically shown in the TCI indication field of Table 4, where the TCI state corresponding to the value of each TCI indication field can be pre-configured by the network device.

table 3

TCI indicator field Corresponding meaning 000 TCI state 1, TCI state 2 001 TCI state 1, TCI state 3 … … 111 TCI status 4

Table 4 TCI indication field in DCI

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

In addition, in this example, the network device 102 may also send fourth information to the terminal device 101 to instruct the terminal device 101 to determine the status of the first resource according to the multiple TCI states after receiving multiple TCI states indicated by the first information. The DMRS port adopts the multiple QCL parameters to prevent the terminal device 101 from associating multiple QCL parameters to different DMRS ports, or associating multiple QCL parameters to DMRS ports on different time-frequency domain resources. It should be understood that the fourth information may be used to instruct the terminal device 101 to perform data transmission according to the method shown in FIG. 2. Specifically, the fourth information may be used to indicate that multiple TCI states or multiple QCL parameters correspond to the same DMRS port. The fourth information may be carried in the same DCI as the first information, or the fourth information may be 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 a TCI state includes multiple first QCL parameters, all DMRS ports scheduled by the DCI where the first information is located use multiple first QCL parameters on all scheduled time-frequency resources. A QCL parameter.

In a possible implementation manner, when the first information indicates multiple TCI states, the terminal device also needs to determine the DMRS receiving behavior according to the fourth information. Specifically, the fourth information is DMRS port indication information, which is used to indicate scheduling DMRS port number. When the DMRS port number indicated by the fourth information is in the same code domain multiplexing (CDM) group, all DMRS ports scheduled by the DCI where the first information is located use multiple time-frequency resources. First QCL parameters; when the DMRS port numbers indicated by the fourth information are in different code division multiplexing groups, DMRS ports in different CDM groups use different first QCL parameters.

In a possible implementation manner, when the first information indicates multiple TCI states, the terminal device also needs to determine the DMRS receiving behavior according to the fourth information. Specifically, the fourth information includes DMRS port indication information, which is used to indicate the scheduled DMRS port number. When the DMRS port number indicated by the fourth information is in the same code division multiplexing group and the fourth information indicates that the current transmission adopts the SFN mode, All DMRS ports scheduled by the DCI where one information is located use multiple first QCL parameters on all scheduled time-frequency resources; when the DMRS port number indicated by the fourth information is in the same code division multiplexing group and the fourth information indicates the current The transmission adopts frequency domain multiplexing (FDM) mode. All DMRS ports scheduled by DCI where the first information is located use different first QCL parameters on the first part of the time-frequency resource and the second part of the time-frequency resource. When the DMRS port numbers indicated by the fourth information are located in different code division multiplexing groups, the DMRS ports located in the different CDM groups adopt different first QCL parameters.

In a possible implementation manner, the reference signals corresponding to the multiple first QCL parameters are the same. According to the indication information, the terminal device can determine that the current PDSCH transmission adopts the SFN mode, and then adopts a specific channel estimation algorithm. For example, the reference signal corresponding to the first QCL parameter is used to detect the channel including multipath and multipath reception strength. When the receiving strength of the multipath is equal, the terminal device estimates the equivalent frequency offset to receive the DMRS according to the detected multipath. When the receiving strength of the multipath differs greatly, the terminal device receives the DMRS according to the frequency offset obtained by the detected stronger path .

In addition, in this example, an implicit indication can also be used to make the terminal device 101 determine that the multiple TCI states are associated with the same DMRS port. For example, when the second QCL parameters corresponding to multiple TCI states are associated with the same reference signal port, the terminal device 101 can determine that multiple TCI states are associated with the same DMRS port, and subsequently can determine multiple QCLs according to the multiple TCI states parameter.

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

Optionally, when the DCI indicates multiple TCI states and the fourth information is received, the time interval between the reception start time of the DMRS and the corresponding data channel and the DCI reception end time is t3; when the DCI indicates multiple TCI states And when any condition in the fourth message is not met (or when multiple TCI states are not indicated in the DCI and/or the terminal device 101 does not receive the fourth message), the DMRS and the corresponding data channel reception start time The time interval between DCI and DCI reception termination time is t4. Among them, t3 can be greater than t4.

Optionally, the terminal device 101 reports to the network device 102 that it supports indicating multiple TCI states and indicating fourth information.

In the embodiment of the present application, multiple downlink reference signals may be used to indicate (or represent, characterize) multiple QCL parameters. Specifically, the first information may include TCI state information, and the TCI state corresponding to the TCI state information may correspond to the multiple downlink reference signals. For example, TCI state 1 is used to indicate the quasi co-location relationship between the DMRS port and the reference signals RS1 and RS2, which can be understood as indicating multiple QCL parameters through the reference signals RS1 and RS2.

Among them, multiple downlink reference signals may come from one or more transmission reception points (TRP).

The method for indicating multiple QCL parameters through the downlink reference signal will be specifically described below in different situations.

Case 1: The multiple QCL parameters are multiple first QCL parameters.

In this case, the first information may indicate one or more first downlink reference signals, where the one or more first downlink reference signals are associated with a 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 assumptions; in other words, the one or more first downlink reference signals and DMRS is QCL under the first QCL parameter. There is a one-to-one correspondence between multiple first downlink reference signals and multiple first QCL parameters, or one first downlink reference signal corresponds to multiple first QCL parameters. Wherein, the first downlink reference signal may be TRS or CSI-RS.

Taking the multiple first downlink reference signals as TRS as an example, the TCI status indicated by the TCI status information included in the first information may correspond to the respective identifications of the multiple 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 identifier and the QCL parameter is shown in Table 5 by way of example only. This application does not exclude that one reference signal identifier can correspond to multiple QCL parameters. For example, TRS1 may also correspond to the first QCL parameter. RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter.

table 5

As shown in Table 5, if the first information indicates the TCI status 1 through a TCI status message, the terminal device 101 can determine the RS ID1 under the first QCL parameter according to TRS1, and determine the RS under the first QCL parameter according to TRS2 ID2.

In addition, if the multiple first QCL parameters are indicated by multiple TCI status information in the first information, the TCI status indicated by each TCI status information may correspond to the identifiers of some TRSs in the multiple 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. In addition, 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 identifier and the QCL parameter is shown in Table 6 by way of example only, and this application does not exclude that one reference signal identifier may correspond to multiple QCL parameters. For example, TRS1 may also correspond to the first QCL parameter. RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter.

TCI status Reference signal identification QCL parameters TCI status 1 TRS1 The first QCL parameter TCI status 2 TRS2 The first QCL parameter TCI status 3 CSI-RS1 Second QCL parameter TCI status 4 CSI-RS2 Second QCL parameter TCI status 5 CSI-RS3, CSI-RS4 Second QCL parameter TCI status 6 CSI-RS5, CSI-RS6 Second QCL parameter TCI status 7 CSI-RS7 The first QCL parameter ... ... ...

Table 6

As shown in Table 6, if the first information indicates the TCI status 1 and TCI status 2 through multiple TCI status information, the terminal device 101 can 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 state 2. Therefore, the RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter can be indicated through TRS1 and TRS2.

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

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

Case 2: The multiple QCL parameters include multiple first QCL parameters and one or more second QCL parameters.

In this case, referring to Case 1, the first information indicates one or more first downlink reference signals to indicate a plurality of first QCL parameters. In addition, in this case, at least one of the one or more first downlink reference signals may also be used to indicate one or more second QCL parameters, where one or more first downlink reference signals At least one first downlink reference signal in the signal is associated with one or more QCL parameters. Specifically, at least one of the one or more first downlink reference signals has the same second QCL parameter as the DMRS, or at least one of the one or more first downlink reference signals has the same second QCL parameter. A downlink reference signal and DMRS are QCL under the second QCL parameter. For example, as shown in Table 5, TCI state 2 can 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 the first QCL parameter. RS ID5 under QCL parameters. If the TCI status 2 is indicated by a TCI status message in the first information, the terminal device 101 can determine the RS ID3 under the first QCL parameter according to TRS3, determine the RS ID4 under the first QCL parameter according to TRS4, and determine according to TRS3 RS ID1 under the second QCL parameter.

In specific implementation, as shown in FIG. 3, in this application, TRS1 and TRS2 can be used to indicate the first QCL parameter of DMRS port 0, and TRS1 can be used to indicate the second QCL parameter of DMRS port 0. In this example, UE101 may receive the PDSCH scheduled by the first information based on the receiving beam of TRS1. Among them, TRS1 and TRS2 come from transmission point 1 and transmission point 2, respectively.

In addition, in this case, the plurality of first downlink reference signals of the plurality of first downlink reference signals indicated by the first information may have the same second QCL parameter as the DMRS, and thus may be indicated by the second downlink reference signal The second QCL parameter. 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. In addition, 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 first information indicates the TCI status 3 through the TCI status information, the terminal device 101 can determine the RS ID3 under the first QCL parameter and the RS ID2 under the second QCL parameter according to TRS3, and determine the RS ID2 under the first QCL parameter according to TRS4. RS ID4 and RS ID3 under the second QCL parameter.

In specific implementation, if the first downlink reference signal is TRS, and the multiple QCL parameters include a second QCL parameter, as shown in FIG. 4, in this application, TRS1 and TRS2 can be used to indicate the first QCL parameter of DMRS port 0, And the second QCL parameter of DMRS port 0 is indicated through TRS1 and TRS2. In this example, the UE may receive the PDSCH scheduled by the first information based on the receiving beams of TRS1 and TRS2. Generally, the receiving beams of TRS1 and TRS2 are different, so the UE needs to use different antenna panels (or antenna groups) to receive. Among them, an antenna panel can be understood as a transmission link including radio frequency units, antenna ports, power amplifiers, and filters. In this example, data and DMRS use two receiving beams of TRS1 and TRS2 respectively (corresponding to two antenna panels) After receiving, the channel parameters can be further determined based on the respective TRS, such as Doppler frequency offset or Doppler delay spread, independent channel estimation, and then the soft information of the data is obtained separately and combined to increase robustness.

In addition, in this case, in addition to indicating multiple first QCL parameters through multiple first downlink reference signals, one or more second downlink reference signals may also be used to indicate second QCL parameters, where one or more Two downlink reference signals are associated with 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 also indicate a second downlink reference signal, where the second downlink reference signal and the DMRS have the same second QCL parameter. For the configuration of the first downlink reference signal, refer to the description in Case 1. The type of the second downlink reference signal is different from that of the first downlink reference signal. For example, if the first downlink reference signal is TRS, the second downlink reference signal is CSI-RS (or other types of RS except TRS and CSI-RS); if the first downlink reference signal is CSI-RS, then The second downlink reference signal is TRS (or other types of RS except TRS and 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. Accordingly, the multiple QCL parameters indicated by TRS1 and TRS2 may include those under the first QCL parameter. RS ID1 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. Accordingly, the QCL parameters indicated by CSI-RS1 and CSI-RS2 may include RS under the second QCL parameter ID1 and/or RS ID2 under the second QCL parameter.

In specific implementation, if the first downlink reference signal is TRS, and the multiple QCL parameters include a second QCL parameter, as shown in FIG. 5, TRS1 and TRS2 can be used to indicate the first QCL parameter of DMRS port 0 in this application. And a non-zero power CSI-RS (CS-RS1 as shown in FIG. 6) is used to indicate the second QCL parameter of the DMRS port 0. In this example, the UE may receive the PDSCH scheduled by the first information based on the receiving beam of the CSI-RS1. In this example, before scheduling the PDSCH, the terminal device 101 will not only receive multiple TRSs, but also multiple CSI-RSs. The role of CSI-RS is to train the transceiver beams, that is, the reception of different CSI-RSs. Different beams are used for transmission, and the terminal device 101 can allow the network device 102 to determine the optimal receiving/transmitting beam for data transmission by reporting measurement information.

In addition, in this case, the first information may also indicate a plurality of second downlink reference signals, and the plurality of second downlink reference signals have 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 TCI state 5. Correspondingly, the QCL parameters indicated by CSI-RS3 and CSI-RS4 may include RS under the second QCL parameter. ID3. For another example, in Table 6, the second downlink reference signal may include CSI-RS5 and CSI-RS6 corresponding to TCI state 6. Correspondingly, the QCL parameters indicated by CSI-RS5 and CSI-RS6 may include RS under the second QCL parameter. ID4 and RS ID5 under the second QCL parameter.

In specific implementation, if the first downlink reference signal is TRS, and the multiple QCL parameters include a second QCL parameter, as shown in FIG. 6, TRS1 and TRS2 can be used to indicate the first QCL parameter of DMRS port 0 in this application. In addition, the network device 102 may send CSI-RS1 and CSI-RS2 to the terminal device 101 before sending the first information for beam training. In the first information, the second QCL parameter of DMRS port 0 can be indicated through CSI-RS1 and CSI-RS2, and the terminal device can receive the PDSCH scheduled by the first information based on the receiving beams of CSI-RS1 and CSI-RS2. Further, the UE can perform channel estimation based on the channel received by CSI-RS1, combined with the channel parameters obtained by TRS1, and at the same time, based on the channel received by CSI-RS2, combined with the channel parameters obtained by TRS2, and then obtain the soft information of the data respectively. Combine, increase the robustness of data reception.

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

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

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

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

S201: The network device determines the first information. In other words, the network device obtains the first information.

The first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports. Wherein, each group of DMRS ports in the multiple groups of DMRS ports corresponds to one of multiple QCL parameters, and each group of DMRS ports in the multiple groups of DMRS ports includes at least one DMRS port. In other words, 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 group of DMRS ports may include one or more DMRS ports.

Optionally, each group of DMRS ports in the multiple groups of DMRS ports includes the same number of DMRS ports.

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

Optionally, one DMRS port in each group of DMRS ports in the multiple groups of DMRS ports jointly corresponds to the same PDSCH port. For example, DMRS port group 0 includes DMRS port 0 and DMRS port 1, and DMRS port group 1 includes DMRS port 2 and DMRS port 3. Then, DMRS port 0 and DMRS port 2 correspond to the same PDSCH port, DMRS port 1 and DMRS Port 3 corresponds to the same PDSCH port.

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

Optionally, multiple DMRS ports in a group of DMRS ports 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 or 2 or 3 or 4.

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

Correspondingly, the terminal device receives the first information.

S203: The network device sends a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.

Correspondingly, the terminal device determines multiple sets of DMRS ports according to the first information, and receives the PDSCH according to the multiple sets of DMRS ports. Specifically, the channel estimation result of each PDSCH port will be jointly determined according to one DMRS port in each group of DMRS ports in the multiple groups of DMRS ports.

Using the above method, the network device can configure multiple QCL parameters associated with multiple groups of DMRS ports to the terminal device, and multiple 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 multiple DMRS ports according to multiple DMRS ports for one PDSCH port, and perform operations such as combining and averaging the multiple channel estimation results for the data layer reception of the PDSCH port to improve Channel estimation performance.

It should be understood that for each DMRS port, the QCL parameter may include a first QCL parameter, such as a first QCL parameter, or include a first QCL parameter and a second QCL parameter, such as a first QCL parameter and a second QCL parameter. Among them, the first QCL parameter and the second QCL parameter can refer to the foregoing description. Among them, the QCL parameters in the same group of DMRS ports are the same, that is, each DMRS port corresponds to the same first QCL parameter or the same first and second QCL parameters; QCL parameters in different groups of DMRS ports are different, that is, different The DMRS ports in the group correspond to different first QCL parameters or different first QCL parameters and second QCL parameters.

Exemplarily, the first information may include one piece of TCI state information, and the TCI state information may be used to indicate the multiple QCL parameters, for example, to indicate multiple first QCL parameters.

In addition, the network device 102 may send the second information to the terminal device 101 to indicate the corresponding relationship between the TCI state and the QCL parameter. The TCI state may include one or more TCI states, the QCL parameter may include one or more QCL parameters, and the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states One or more of the QCL parameters correspond. One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information. The second information may be indicated by signaling such as RRC, MAC CE, or DCI. The corresponding relationship can be shown in Table 7. Each TCI state can correspond to multiple QCL parameters. After the terminal device 101 determines the TCI status information according to the first information, it can query Table 7 to determine the multiple QCL parameters of the multiple DMRS ports indicated by the network device 102. For example, when there are two groups of DMRS ports, and each group of DMRS ports only includes one DMRS port, if the network device indicates TCI status 3, the first group of DMRS ports in the two groups of DMRS ports is related to the first QCL parameter of RS5 And is associated with the second QCL parameter of RS7, the second group of DMRS ports in the two groups of DMRS ports is associated with the first QCL parameter of RS6, and is associated with the second QCL parameter of RS8. One PDSCH port corresponds to the first group of DMRS ports and the second group of DMRS ports. It should be understood that the first QCL parameter and the second QCL parameter correspond to different QCL types. In the following table, the first QCL parameters corresponding to different RS IDs respectively represent the RS IDs under the first QCL parameters.

Table 7

In addition, if the multiple QCL parameters corresponding to the multiple DMRS ports include multiple first QCL parameters and multiple second QCL parameters, the network device 102 may also send third information to the terminal device 101. The third information may be used to indicate the corresponding relationship between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device 101 associates the first QCL with the second QCL parameter, so as to perform processing according to the associated QCL parameter Channel estimation.

Optionally, the corresponding relationship between the multiple first QCL parameters and the multiple second QCL parameters can be predefined. For example, the corresponding relationship is determined according to the order of parameter configuration, and the configuration sequence numbers of the multiple first QCL parameters are from small to large. Corresponding to multiple second QCL parameters with configuration numbers from small to large in sequence.

For example, for TCI status 3 in Table 7, the network device also needs to configure RS ID4 under the first QCL parameter and RS ID2 under the second QCL parameter to have an association relationship, RS ID5 under the first QCL parameter and second QCL parameter If the RS ID3 has an association relationship, based on the third information, the terminal device can use the receiving beam corresponding to the RS ID2 under the second QCL parameter to receive the DMRS signal 1, and according to the associated RS ID4 and the RS ID4 under the first QCL parameter The DMRS signal 1 determines the channel estimation result 1. In addition, the terminal device may use the receiving beam corresponding to the RS ID3 under the second QCL parameter to receive the DMRS signal 2 and determine the channel estimation result 2 according to the RS ID5 and the DMRS signal 2 under the associated first QCL parameter. After that, the terminal device can receive the PDSCH according to the channel estimation result 1 and the channel estimation result 2. The above third information can 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 multiple TCI status information, where one of the multiple TCI status information may be used to indicate one QCL parameter. For example, any one of multiple TCI status information can be used to indicate one QCL parameter, or each of multiple TCI status information can be used to indicate one QCL parameter

Specifically, if the multiple QCL parameters include multiple first QCL parameters, one of the multiple TCI status information may be used to indicate one first QCL parameter. In this example, the network device 102 may send the second information to the terminal device 101 to indicate the corresponding relationship between the TCI state and the QCL parameter, 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 status and QCL parameters is shown in Table 3. The first information is specifically shown in the TCI indication field of Table 4, where the TCI state corresponding to the value of each TCI indication field can be pre-configured by the network device.

In the embodiment of the present application, multiple downlink reference signals may be used to indicate multiple QCL parameters, where multiple downlink reference signals are associated with the multiple QCL parameters. Specifically, the first information may include TCI state information, and the TCI state corresponding to the TCI state information may correspond to the multiple downlink reference signals. For example, TCI state 1 is used to indicate the quasi co-location relationship between the DMRS port and the reference signals RS1 and RS2, which can be understood as indicating multiple QCL parameters through the reference signals RS1 and RS2.

The method for indicating multiple QCL parameters through the downlink reference signal will be specifically described below in different situations.

Case 1: The multiple QCL parameters are multiple first QCL parameters.

Exemplarily, the first information may be used to indicate multiple first downlink reference signals, where the multiple first downlink reference signals are associated with multiple first QCL parameters. Specifically, the plurality of first downlink reference signals and the plurality of 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. There is a one-to-one correspondence between multiple first downlink reference signals and multiple first QCL parameters, or one first downlink reference signal corresponds to multiple first QCL parameters. Wherein, the first downlink reference signal may be TRS or CSI-RS.

Taking the multiple first downlink reference signals as TRS as an example, the TCI status indicated by the TCI status information included in the first information may correspond to the respective identifications of the multiple TRSs. For example, as shown in Table 5, if the TCI status 1 is indicated in the first information, the terminal device 101 can determine the RS ID1 under the first QCL parameter according to TRS1, and determine the RS under the first QCL parameter according to TRS2 ID2.

In addition, if the first information can indicate the multiple first QCL parameters through multiple TCI status information, the TCI status indicated by each TCI status information can correspond to the identifiers of some TRSs in the multiple 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. In addition, TCI state 2 may correspond to TRS2, where TRS2 corresponds to RS ID2 under the first QCL parameter. Therefore, the RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter can be indicated through TRS1 and TRS2.

Case 2: The multiple QCL parameters include multiple first QCL parameters and one or more second QCL parameters.

In this case, referring to Case 1, the first information indicates multiple first downlink reference signals to indicate multiple first QCL parameters. In addition, in this case, one or more second QCL parameters may also be indicated by one of the first downlink reference signals among the plurality of first downlink reference signals, where one of the plurality of first downlink reference signals is the first A downlink reference signal is associated with one or more second QCL parameters. Specifically, the first downlink reference signal among the plurality of first downlink reference signals and the DMRS have the same second QCL parameter, or at least one first downlink reference signal among the plurality of first downlink reference signals , And DMRS is QCL under the second QCL parameter. For example, as shown in Table 5, TCI state 2 can 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 the first QCL parameter. RS ID5 under QCL parameters. If the TCI status 2 is indicated by a TCI status message in the first information, the terminal device 101 can determine the RS ID3 under the first QCL parameter according to TRS3, determine the RS ID4 under the first QCL parameter according to TRS4, and determine according to TRS3 RS ID1 under the second QCL parameter.

In addition, in this case, the multiple first downlink reference signals of the multiple first downlink reference signals indicated by the first information may also have the same second QCL parameters as the DMRS, so that the second downlink reference signal can be passed through Indicates the second QCL parameter. 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. In addition, TRS3 also corresponds to RS ID2 under the second QCL parameter, and TRS4 also corresponds to RS ID3 under the second QCL parameter. Thus, multiple first QCL parameters and multiple second QCL parameters can be indicated through TRS3 and TRS4.

In addition, in this case, in addition to indicating multiple first QCL parameters through multiple first downlink reference signals, one or more second downlink reference signals may also be used to indicate second QCL parameters, where one or more first downlink reference signals are used to indicate the second QCL parameters. The second downlink reference signal is associated with the second QCL parameter. The one or more second downlink reference signals and the DMRS have the same second QCL parameter, or in other words, the one or more second downlink reference signals and the DMRS have the QCL under the second QCL parameter. Specifically, the first information may also indicate a second downlink reference signal, where the second downlink reference signal and the DMRS have the same second QCL parameter. For the configuration of the first downlink reference signal, refer to the description in Case 1. The type of the second downlink reference signal is different from that of the first downlink reference signal. For example, if the first downlink reference signal is TRS, the second downlink reference signal is CSI-RS (or other types of RS except TRS and CSI-RS); if the first downlink reference signal is CSI-RS, then The second downlink reference signal is TRS (or other types of RS except TRS and 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. Accordingly, the multiple QCL parameters indicated by TRS1 and TRS2 may include those under the first QCL parameter. RS ID1 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. Accordingly, the QCL parameters indicated by CSI-RS1 and CSI-RS2 may include RS under the second QCL parameter ID1 and/or RS ID2 under the second QCL parameter.

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

In a possible implementation manner, the communication device 900 shown in FIG. 9 can be used as the network device involved in the foregoing method embodiment, and executes the steps performed by the network device in the foregoing method embodiment. As shown in FIG. 9, the communication device 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 can be used to support the communication device 900 to communicate, and the communication module 901 can have a wireless communication function, for example, can perform wireless communication with other communication devices through a wireless air interface. The processing module 902 can be used to support the communication device 900 to perform the processing actions in the foregoing method embodiments. The processing actions here include, but are not limited to: generating information and messages sent by the communication module 901, and/or receiving information from the communication module 901. The signal is demodulated and decoded and so on.

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

In addition, the above processing module 902 can be specifically used to perform processing actions of the network device in the communication method shown in FIG. 2 or FIG. Processing and other operations.

When implementing the communication method provided in the process shown in FIG. 2 in the embodiment of the present application, the processing module 902 may be used to determine (or obtain) the first information. Wherein, the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource. The communication module 901 may be used to send the first information to the terminal device. The communication module 901 can also be used to send DMRS through the DMRS port. For the implementation of the above first information, refer to the description of the first information involved in the method shown in FIG. 2 in the method embodiment.

Exemplarily, the communication module 901 may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information involved in the method shown in FIG. 2 in the method embodiment.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the communication module 901 may also be used to send third information to the terminal device. For the implementation of the third information, refer to the description of the third information involved in the method shown in FIG. 2 in the method embodiment.

When implementing the communication method provided in the process shown in FIG. 8 in the embodiment of the present application, the processing module 902 may be used to determine (or obtain) the first information. Wherein, the first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports. The communication module 901 may be used to send the first information to the terminal device. The communication module 901 can also be used to send a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. For the implementation of the above first information, refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.

Exemplarily, the communication module 901 may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information involved in the method shown in FIG. 8 in the method embodiment.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the communication module 901 may also be used to send third information to the terminal device. For the implementation of the third information, refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.

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

For ease of understanding, FIG. 10 takes a base station as an example to illustrate the structure of the communication device. As shown in FIG. 10, the communication device 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 can be used for communication with a communication device. The memory 1002 is coupled with the processor 1003 and can be used to store programs and data necessary for the communication device 1000 to implement various functions. The processor 1003 is configured to support the communication device 1000 to execute the corresponding function of the network device in the foregoing method, and the function can be implemented by calling a program stored in the memory 1002.

Specifically, the transceiver 1001 may be a wireless transceiver, which may be used to support the communication device 1000 to receive and send 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. The transceiver 1001 may include a radio frequency unit and one or more antennas. The radio frequency unit, such as a remote radio unit (RRU), can be specifically used for radio frequency signals. The one or more antennas can specifically be used to radiate and receive radio frequency signals. Optionally, the transceiver 1001 may only include the above radio frequency units. In this case, the communication device 1000 may include a transceiver 1001, a memory 1002, a processor 1003, and an antenna.

The memory 1002 and the processor 1003 may be integrated or independent of each other. As shown in FIG. 10, the memory 1002 and the processor 1003 can be integrated into the control unit 1010 of the communication device 1000. Exemplarily, the control unit 1010 may include a baseband unit (BBU) of an LTE base station, and the baseband unit may also be called a digital unit (DU), or the control unit 1010 may include 5G and future wireless access Under technology, a distributed unit (DU) and/or a centralized unit (CU) in a base station. The above-mentioned control unit 1010 may be composed of one or more single boards, wherein multiple single boards can jointly support a wireless access network (such as an LTE network) of a single access standard, and multiple single boards can also support different access standards. Wireless access network (such as LTE network, 5G network or other networks). The memory 1002 and the processor 1003 may serve one or more single boards. In other words, the memory 1002 and the processor 1003 can be separately provided on each board. It may also be that multiple boards share the same memory 1002 and processor 1003. In addition, a necessary circuit may be provided on each board, for example, the circuit may be used to realize the coupling between the memory 1002 and the processor 1003. The above transceiver 1001, the processor 1003, and the memory 1002 may be connected through a bus structure and/or other connection media.

Based on the structure shown in FIG. 10, when the communication device 1000 needs to send data, the processor 1003 can baseband process the data to be sent and output the baseband signal to the radio frequency unit. The radio frequency unit performs radio frequency processing on the baseband signal and passes the radio frequency signal through the antenna. Send in the form of electromagnetic waves. When data is sent to the communication device 1000, the radio frequency unit receives the radio frequency signal through the antenna, converts the radio frequency 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 applies the data to the baseband signal. To process.

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

In addition, the above processor 1003 can be specifically used to perform processing actions of the network device in the communication method shown in FIG. 2 or FIG. Processing and other operations.

When implementing the communication method provided in the process shown in FIG. 2 in the embodiment of the present application, the processor 1003 may be used to determine (or obtain) the first information. Wherein, the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource. The transceiver 1001 can be used to send the first information to the terminal device. The transceiver 1001 can also be used to transmit DMRS through the DMRS port. For the implementation of the above first information, refer to the description of the first information involved in the method shown in FIG. 2 in the method embodiment.

Exemplarily, the transceiver 1001 may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information involved in the method shown in FIG. 2 in the method embodiment.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the transceiver 1001 may also be used to send third information to the terminal device. For the implementation of the third information, refer to the description of the third information involved in the method shown in FIG. 2 in the method embodiment.

When implementing the communication method provided by the process shown in FIG. 8 in the embodiment of the present application, the processor 1003 may be used to determine (or obtain) the first information. Wherein, the first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports. The transceiver 1001 can be used to send the first information to the terminal device. The transceiver 1001 may also be used to transmit a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. For the implementation of the above first information, refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.

Exemplarily, the transceiver 1001 may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the second information, refer to the description of the second information involved in the method shown in FIG. 8 in the method embodiment.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the transceiver 1001 may also be used to send third information to the terminal device. For the implementation of the third information, refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.

In a possible implementation manner, the communication device 1100 shown in FIG. 11 can be used as the terminal device involved in the foregoing method embodiment, and executes 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, and the communication module 1101 and the processing module 1102 are coupled to each other. The communication module 1101 can be used to support the communication device 1100 to communicate. The communication module 1101 can have a wireless communication function, for example, can communicate with other communication devices through a wireless air interface. The processing module 1102 can be used to support the communication device 1100 to perform the processing actions in the foregoing method embodiments. The processing actions here include, but are not limited to: generating information and messages sent by the communication module 1101, and/or information received by the communication module 1101 The signal is demodulated and decoded and so on.

It should be understood that the above communication module 1101 may be specifically used to perform the sending and/or receiving actions of the terminal device in the communication method shown in FIG. 2 or FIG. 8. For example, the communication module 1101 may be used to perform an action of receiving information, messages, or signaling from a network device by a terminal device, or to perform an action of sending information, messages, or signaling to a network device.

In addition, the above processing module 1102 can be specifically used to perform processing actions of the terminal device in the communication method shown in FIG. 2 or FIG. Processing and other operations.

When implementing the communication method provided by the process shown in FIG. 2 in the embodiment of the present application, the communication module 1101 may be used to receive first information from the network device, and the first information is used to indicate the multiple QCLs of the DMRS port on the first resource parameter. The communication module 1101 can also be used to receive DMRS through the DMRS port. For the implementation of the above first information, refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.

Exemplarily, the communication module 1101 may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the above second information, refer to the description of the second information involved in the method shown in FIG. 8 in the method embodiment.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the communication module 1101 may also be used to receive third information from the network device. For the implementation of the above third information, refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.

When implementing the communication method provided by the process shown in FIG. 8 in the embodiment of the present application, the communication module 1101 may be used to receive the first information from the network device. Wherein, the first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports. The communication module 1101 may also be used to receive the PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. For the implementation of the above first information, refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.

Exemplarily, the communication module 1101 may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the above second information, refer to the description of the second information involved in the method shown in FIG. 8 in the method embodiment.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the communication module 1101 may also be used to receive third information from the network device. For the implementation of the above third information, refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.

In another possible implementation manner, the communication device provided in the embodiment of the present application may also be composed of hardware components, such as a processor, a memory, or a transceiver. For ease of understanding and illustration, in FIG. 12, a mobile phone is taken as an example to illustrate the possible structure of the terminal device. As shown in FIG. 12, the communication device 1200 may include a processor 1201, a memory 1202, and a transceiver 1203.

The above processor 1201 can be used to process communication protocols and communication data, control terminal devices, execute software programs, and process data of software programs, and so on. The memory 1202 may be used to store programs and data, and the processor 1201 may execute the method executed by the terminal device in the embodiments of the present application based on the program.

The transceiver 1203 may include a radio frequency unit and an antenna. Among them, the radio frequency unit can be used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The antenna can be used to send and receive radio frequency signals in the form of electromagnetic waves. In addition, the radio frequency unit may only be regarded as the transceiver 1203, then the communication device 1200 may include a processor 1201, a memory 1202, a transceiver 1203, and an antenna at this time.

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

Based on the structure shown in FIG. 12, when the communication device 1200 needs to send data, the processor 1201 can baseband processing the data to be sent, and output the baseband signal to the radio frequency unit. The radio frequency unit performs radio frequency processing on the baseband signal and passes the radio frequency signal through the antenna. Send in the form of electromagnetic waves. When data is sent to the communication device 1200, the radio frequency unit receives the 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 applies the data to the baseband signal. To process.

It should be understood that the above transceiver 1203 may be specifically used to perform the sending and/or receiving actions of the terminal device in the communication method shown in FIG. 2 or FIG. 8. For example, the transceiver 1203 may be used to perform an action of receiving information, messages, or signaling from a network device by a terminal device, or to perform an action of sending information, messages, or signaling to a network device.

In addition, the above processor 1201 may be specifically used to perform processing actions of the terminal device in the communication method shown in FIG. 2 or FIG. 8, such as controlling the transceiver 1203 to receive and send information, messages, or signaling, and execute information Processing and other operations.

When implementing the communication method provided by the process shown in FIG. 2 in the embodiment of the present application, the transceiver 1203 may be used to receive first information from the network device, and the first information is used to indicate the multiple QCLs of the DMRS port on the first resource parameter. The transceiver 1203 can also be used to receive DMRS through the DMRS port. For the implementation of the above first information, refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.

Exemplarily, the transceiver 1203 may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the above second information, refer to the description of the second information involved in the method shown in FIG. 8 in the method embodiment.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the transceiver 1203 may also be used to receive third information from the network device. For the implementation of the above third information, refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.

When implementing the communication method provided by the process shown in FIG. 8 in the embodiment of the present application, the transceiver 1203 may be used to receive the first information from the network device. Wherein, the first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports. The transceiver 1203 can also be used to receive the PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports. For the implementation of the above first information, refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.

Exemplarily, the transceiver 1203 may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter. For the implementation of the above second information, refer to the description of the second information involved in the method shown in FIG. 8 in the method embodiment.

In addition, if the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, the transceiver 1203 may also be used to receive third information from the network device. For the implementation of the above third information, refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.

In addition, according to actual needs, the communication device provided in the embodiments of the present application may include a processor, and the processor may call an external transceiver and/or memory to implement the above-mentioned functions or steps or operations. The communication device may also include a memory, and the processor can call and execute a program stored in the memory to implement the above-mentioned functions or steps or operations. Alternatively, the communication device may also include a processor, that is, a transceiver, and the processor calls 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, a memory, and a transceiver.

Based on the same idea as the above method embodiment, the embodiment of the present application also provides a computer-readable storage medium on which program instructions (or computer programs, instructions) are stored. When the program instructions are executed by the processor, the The computer executes the operations performed by the network device and/or the terminal device in any one of the foregoing method embodiments and any possible implementation of the method embodiments.

Based on the same concept as the above method embodiment, this application also provides a computer program product, including program instructions, which when called by a computer for execution, can make the computer implement any of the above method embodiments and method embodiments The operations performed by the network device and/or the terminal device in a possible implementation manner.

Based on the same concept as the above method embodiment, this application also provides a chip or chip system, which is coupled with a transceiver, and is used to implement the above method embodiment and any one of the possible implementation manners of the method embodiment. And/or the operation performed by the terminal device. The chip system may include the chip and components such as memory and communication interface.

Based on the same concept as the above method embodiment, this application also provides a communication system that can be used to implement the above method embodiment and any one of the possible implementations of the method embodiment is executed by a network device and/or a terminal device. Operation. Exemplarily, 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.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to this application without departing from the protection scope of this application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims (26)

A communication method, characterized in that it comprises: Determining first information, where the first information is used to indicate a plurality of quasi-co-located QCL parameters of the demodulation reference signal DMRS port on the first resource; Sending the first information to a terminal device; The DMRS is sent through the DMRS port. The method of claim 1, wherein the multiple QCL parameters comprise: Multiple first QCL parameters; or, A plurality of first QCL parameters and one or more second QCL parameters. The method according to claim 2, wherein the first QCL parameter includes one or more of the following parameters: Doppler frequency offset, Doppler spread, delay spread, and average delay. The method according to claim 2 or 3, wherein the second QCL parameter comprises a spatial receiving parameter or a spatial receiving beamforming parameter. The method according to any one of claims 1 to 4, wherein the first information includes a transmission control indication TCI status information, and the one TCI status information is used to indicate the multiple QCL parameters. The method of claim 5, wherein the method further comprises: Sending second information to the terminal device, where the second information is used to indicate a correspondence between a TCI state and a QCL parameter, and the one TCI state information is used to indicate one TCI state. The method according to claim 5 or 6, wherein the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, and the method further comprises: Send third information to the terminal device, where the third information is used to indicate the correspondence between the multiple first QCL parameters and the multiple second QCL parameters. The method according to any one of claims 2-4, wherein the first information includes a plurality of TCI status information, and one of the plurality of TCI status information is used to indicate the plurality of first QCLs One of the parameters. The method according to any one of claims 2-8, wherein the first information is used to indicate one or more first downlink reference signals, and the one or more first downlink reference signals are associated with The plurality of first QCL parameters. The method according to 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, and the one or more second downlink reference signals are associated with the one or more second QCL parameters. A communication method, characterized in that it comprises: Receiving first information from a network device, where the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource; According to the first information, a DMRS is received through the DMRS port. The method of claim 11, wherein the multiple QCL parameters comprise: Multiple first QCL parameters; or, A plurality of first QCL parameters and one or more second QCL parameters. The method according to claim 12, wherein the first QCL parameter includes one or more of the following parameters: Doppler frequency offset, Doppler spread, delay spread, and average delay. The method according to claim 12 or 13, wherein the second QCL parameter comprises a spatial receiving parameter or a spatial receiving beamforming parameter. The method according to any one of claims 11-14, wherein the first information includes one piece of TCI status information, and the one piece of TCI status information is used to indicate the multiple 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 corresponding relationship between a TCI state and a QCL parameter, and the one TCI state information is used to indicate one TCI state. The method according to claim 15 or 16, wherein the multiple QCL parameters include multiple first QCL parameters and multiple second QCL parameters, and the method further comprises: Send third information to the terminal device, where the third information is used to indicate the correspondence between the multiple first QCL parameters and the multiple second QCL parameters. The method according to any one of claims 12-14, wherein the first information includes a plurality of TCI status information, and one of the plurality of TCI status information is used to indicate the plurality of first QCLs One of the parameters. The method according to any one of claims 12-18, wherein the first information is used to indicate a plurality of first downlink reference signals, and the one or more first downlink reference signals are associated with the Multiple first QCL parameters. The method according to 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, and the one or more second downlink reference signals are associated with the one or more second QCL parameters. A communication device, characterized in that it comprises: A transceiver for the communication device to communicate; The processor is configured to execute program instructions stored in the memory, and execute the method according to any one of claims 1-10. A communication device, characterized in that it comprises: A transceiver for the communication device to communicate; The processor is configured to execute program instructions stored in the memory, and execute the method according to any one of claims 11-20. A communication system, characterized by comprising the communication device according to claim 21 and the communication device according to claim 22. A computer-readable storage medium, characterized by comprising program instructions, when the program instructions are run on a computer, the computer is caused to execute the method according to any one of claims 1-20. A computer program product, characterized in that, when the computer program product is executed, the method according to any one of claims 1-20 is realized. A chip, characterized by comprising a processor configured to execute program instructions stored in a memory, and execute the method according to any one of claims 1-20.

Images