EP-4742566-A1 - RATE MATCHING METHOD, AND COMMUNICATION APPARATUS

EP4742566A1EP 4742566 A1EP4742566 A1EP 4742566A1EP-4742566-A1

Abstract

This application provides a rate matching method and a communication apparatus. In the method, a network device binds different rate matching mechanisms to a terminal device for different frequency domain resources. Rate matching information indicates a position of a time-frequency resource that is in a corresponding frequency domain resource and that is not used for data transmission. The terminal device may perform rate matching on different frequency domain resources based on different rate matching information. The method can ensure that the terminal device can perform differentiated rate matching in different bandwidths, to implement more accurate data demodulation, thereby improving receiving performance of the terminal device.

Inventors

LIU, YONG
Bi, Xiaoyan
JIANG, Chenglong

Assignees

Huawei Technologies Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20230729

Claims (20)

A rate matching method, comprising: receiving first indication information and second indication information, wherein the first indication information indicates a first frequency domain resource, the second indication information indicates a second frequency domain resource, and the first frequency domain resource and the second frequency domain resource do not overlap; and receiving first rate matching information associated with the first frequency domain resource and second rate matching information associated with the second frequency domain resource, wherein the first rate matching information indicates a position of a time-frequency resource that is in a first time-frequency resource and that is not used for data transmission, the second rate matching information indicates a position of a time-frequency resource that is in a second time-frequency resource and that is not used for data transmission, the first time-frequency resource comprises a first time domain resource and the first frequency domain resource, and the second time-frequency resource comprises the first time domain resource and the second frequency domain resource.
The method according to claim 1, wherein rate matching is performed on the first time-frequency resource based on the first rate matching information; and rate matching is performed on the second time-frequency resource based on the second rate matching information.
The method according to claim 1 or 2, wherein the first frequency domain resource comprises a frequency domain resource used for spatial multiplexing transmission of a first type of signal and a second type of signal, the second frequency domain resource comprises a frequency domain resource used for transmission of the first type of signal, and the first type of signal and the second type of signal are signals of different types.
The method according to claim 3, wherein the first rate matching information indicates that no time-frequency resource in the first time-frequency resource is used for data transmission.
The method according to claim 3, wherein the first rate matching information indicates a position of a time-frequency resource for transmission of a first reference signal and a second reference signal on the first time-frequency resource, the second rate matching information indicates a position of a time-frequency resource for transmission of the first reference signal on the second time-frequency resource, the first reference signal is the first type of signal, and the second reference signal is the second type of signal.
The method according to claim 5, wherein the first rate matching information comprises first mapping information and third indication information, the first mapping information indicates a position of a time-frequency resource available for transmission of the first reference signal and a position of a time-frequency resource available for transmission of the second reference signal that correspond to the first time-frequency resource, and the third indication information indicates a position of a time-frequency resource actually used for transmission of the first reference signal and a position of a time-frequency resource actually used for transmission of the second reference signal that are in the time-frequency resources indicated by the first mapping information.
The method according to claim 5 or 6, wherein the second rate matching information comprises second mapping information and fourth indication information, the second mapping information indicates a position that is of a time-frequency resource available for transmission of the first reference signal and that corresponds to the second time-frequency resource, and the fourth indication information indicates a position of a time-frequency resource that is actually used for transmission of the first reference signal and that is in the time-frequency resource indicated by the second mapping information.
The method according to any one of claims 5 to 7, wherein the first mapping information indicates a pattern of the first reference signal and a pattern of the second reference signal, the pattern of the first reference signal indicates a position of a time-frequency resource that is available for transmission of the first reference signal and that is in a resource grid comprised in the first time domain resource, and the pattern of the second reference signal indicates a position of a time-frequency resource that is available for transmission of the second reference signal and that is in a resource grid comprised in the first time domain resource, wherein the pattern of the first reference signal is the same as the pattern of the second reference signal; or the pattern of the first reference signal is different from the pattern of the second reference signal.
The method according to claim 8, wherein when the pattern of the first reference signal is different from the pattern of the second reference signal and positions of time-frequency resources available for transmission of the reference signals in the two patterns collide, the first mapping information further comprises a first rule, a second rule, or a third rule, wherein the first rule indicates to keep the pattern of the first reference signal unchanged, and indicates that a colliding position in the pattern of the second reference signal is unavailable for transmission of the second reference signal; the second rule indicates to keep the pattern of the second reference signal unchanged, and indicates that a colliding position in the pattern of the first reference signal is unavailable for transmission of the first reference signal; and the third rule indicates to map the pattern of the first reference signal or the pattern of the second reference signal in a staggered manner, to avoid a collision between positions occupied by all ports supported by two patterns after mapping-based adjustment according to the third rule.
The method according to any one of claims 5 to 9, wherein the first reference signal and the second reference signal are demodulation reference signals DMRSs.
The method according to any one of claims 3 to 10, wherein the frequency domain resource that is in the first frequency domain resource and that is used for spatial multiplexing transmission of the first type of signal and the second type of signal is contiguous or non-contiguous in frequency domain.
A rate matching method, comprising: sending first indication information and second indication information, wherein the first indication information indicates a first frequency domain resource, the second indication information indicates a second frequency domain resource, and the first frequency domain resource and the second frequency domain resource do not overlap; and sending first rate matching information associated with the first frequency domain resource and second rate matching information associated with the second frequency domain resource, wherein the first rate matching information indicates a position of a time-frequency resource that is in a first time-frequency resource and that is not used for data transmission, the second rate matching information indicates a position of a time-frequency resource that is in a second time-frequency resource and that is not used for data transmission, the first time-frequency resource comprises a first time domain resource and the first frequency domain resource, and the second time-frequency resource comprises the first time domain resource and the second frequency domain resource.
The method according to claim 12, wherein the first frequency domain resource comprises a frequency domain resource used for spatial multiplexing transmission of a first type of signal and a second type of signal, the second frequency domain resource comprises a frequency domain resource used for transmission of the first type of signal, and the first type of signal and the second type of signal are signals of different types.
The method according to claim 13, wherein the first rate matching information indicates that no time-frequency resource in the first time-frequency resource is used for data transmission.
The method according to claim 13, wherein the first rate matching information indicates a position of a time-frequency resource for transmission of a first reference signal and a second reference signal on the first time-frequency resource, the second rate matching information indicates a position of a time-frequency resource for transmission of the first reference signal on the second time-frequency resource, the first reference signal is the first type of signal, and the second reference signal is the second type of signal.
The method according to claim 15, wherein the first rate matching information comprises first mapping information and third indication information, the first mapping information indicates a position of a time-frequency resource available for transmission of the first reference signal and a position of a time-frequency resource available for transmission of the second reference signal that correspond to the first time-frequency resource, and the third indication information indicates a position of a time-frequency resource actually used for transmission of the first reference signal and a position of a time-frequency resource actually used for transmission of the second reference signal that are in the time-frequency resources indicated by the first mapping information.
The method according to claim 15 or 16, wherein the second rate matching information comprises second mapping information and fourth indication information, the second mapping information indicates a position that is of a time-frequency resource available for transmission of the first reference signal and that corresponds to the second time-frequency resource, and the fourth indication information indicates a position of a time-frequency resource that is actually used for transmission of the first reference signal and that is in the time-frequency resource indicated by the second mapping information.
The method according to any one of claims 15 to 17, wherein the first mapping information indicates a pattern of the first reference signal and a pattern of the second reference signal, the pattern of the first reference signal indicates a position of a time-frequency resource that is available for transmission of the first reference signal and that is in a resource grid comprised in the first time domain resource, and the pattern of the second reference signal indicates a position of a time-frequency resource that is available for transmission of the second reference signal and that is in a resource grid comprised in the first time domain resource, wherein the pattern of the first reference signal is the same as the pattern of the second reference signal; or the pattern of the first reference signal is different from the pattern of the second reference signal.
The method according to claim 18, wherein when the pattern of the first reference signal is different from the pattern of the second reference signal and positions of time-frequency resources available for transmission of the reference signals in the two patterns collide, the first mapping information further comprises a first rule, a second rule, or a third rule, wherein the first rule indicates to keep the pattern of the first reference signal unchanged, and indicates that a colliding position in the pattern of the second reference signal is unavailable for transmission of the second reference signal; the second rule indicates to keep the pattern of the second reference signal unchanged, and indicates that a colliding position in the pattern of the first reference signal is unavailable for transmission of the first reference signal; and the third rule indicates to map the pattern of the first reference signal or the pattern of the second reference signal in a staggered manner, to avoid a collision between positions occupied by all ports supported by two patterns after mapping-based adjustment according to the third rule.
The method according to any one of claims 15 to 19, wherein the first reference signal and the second reference signal are demodulation reference signals DMRSs.

Description

TECHNICAL FIELD This application relates to the wireless communication field, and specifically, to a rate matching method and a communication apparatus. BACKGROUND In a multi-user multiple-input multiple-output (multi-user multiple-input multiple-output, MU-MIMO) scenario, a base station simultaneously communicates with a plurality of terminals. Before performing data demodulation based on a received demodulation reference signal (demodulation reference signal, DMRS), a terminal #1 needs to perform rate matching. Specifically, in addition to a DMRS port of the terminal #1, the terminal #1 usually needs to know a DMRS port of another jointly scheduled terminal, to determine, based on the DMRS port of the terminal #1 and the DMRS port of the another jointly scheduled terminal and resource mapping information corresponding to the DMRS ports, specific resource elements (resource elements, REs) occupied in a current transmission slot, that is, specific REs that are not used for transmission of data of the terminal #1. If the terminal #1 cannot obtain the information, the terminal #1 demodulates a DMRS of another terminal as the data of the terminal #1. In this case, a decoding error is caused. To implement DMRS rate matching of the plurality of terminals, a standard provides an explicit signaling indication manner. The base station may indicate, to the terminal #1, code division multiplexing (code division multiplexing, CDM) group information corresponding to the DMRS ports of the terminal #1 and the another jointly scheduled terminal in the current transmission slot. The CDM group information may be used to determine specific REs that are occupied by the DMRS ports of the terminal #1 and the another jointly scheduled terminal in the current transmission slot. In the foregoing DMRS rate matching scheme, the CDM group information and DMRS port information of the terminal are configured simultaneously. Because the DMRS port information is configured in a DMRS port configuration periodicity, and a corresponding scheduling bandwidth is fixed, a scheduling bandwidth corresponding to the indication of the CDM group information is also fixed. When only a conventional MIMO service exists in a system, the terminal #1 may perform rate matching in the corresponding scheduling bandwidth based on the indicated CDM group information. However, in a service convergence scenario (in other words, a plurality of services coexist), bandwidths used for different services may be different. In this case, how to perform rate matching is an urgent problem to be resolved. SUMMARY This application provides a rate matching method and a communication apparatus. The method can ensure that differentiated rate matching can be performed in different bandwidths, to implement more accurate data demodulation, thereby improving receiving performance of a device. According to a first aspect, a communication method is provided. The method may be performed by a receiver device, or may be performed by a component (for example, a chip or a circuit) of the receiver device. This is not limited. For ease of description, an example in which the method is performed by the receiver device is used for description below. The method may include: The receiver device receives first indication information and second indication information, where the first indication information indicates a first frequency domain resource, the second indication information indicates a second frequency domain resource, and the first frequency domain resource and the second frequency domain resource do not overlap. The receiver device receives first rate matching information associated with the first frequency domain resource and second rate matching information associated with the second frequency domain resource, where the first rate matching information indicates a position of a time-frequency resource that is in a first time-frequency resource and that is not used for data transmission, the second rate matching information indicates a position of a time-frequency resource that is in a second time-frequency resource and that is not used for data transmission, the first time-frequency resource includes a first time domain resource and the first frequency domain resource, and the second time-frequency resource includes the first time domain resource and the second frequency domain resource. In the foregoing technical solution, a transmitter device may bind, to the receiver device for different frequency domain resources, rate matching information corresponding to the frequency domain resources. The method can ensure that a terminal device can perform differentiated rate matching in different bandwidths, to implement more accurate data demodulation, thereby improving receiving performance of the terminal device. In some implementations of the first aspect, the method further includes: The receiver device performs rate matching on each time-frequency unit in the first time-frequency re