CN113873649A

CN113873649A - Stream processing method and device

Info

Publication number: CN113873649A
Application number: CN202010625815.4A
Authority: CN
Inventors: 高慧; 黄梅玉; 闫江北
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-12-31
Also published as: WO2022002130A1

Abstract

The embodiment of the application discloses a stream processing method and a device thereof, wherein the method comprises the following steps: the method comprises the steps that a network device obtains transmission information of a plurality of space division multiplexing streams and sends a first Physical Downlink Shared Channel (PDSCH) to a terminal device according to the transmission information of the plurality of space division multiplexing streams; wherein the plurality of spatial division multiplexing streams are carried on the first PDSCH; transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each spatial multiplexing stream, the reference signal received power RSRP corresponding to each spatial multiplexing stream, and the channel information of the first PDSCH. By implementing the embodiment of the application, the transmission information of the plurality of space division multiplexing streams is determined through the first information, so that the overall demodulation performance of the plurality of space division multiplexing streams is favorably improved, and the spectral efficiency of space division multiplexing is favorably improved.

Description

Stream processing method and device

Technical Field

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

Background

Large-scale antenna technology (massive input multiple output, massive MIMO) is one of the key technologies of the fifth generation (5th generation, 5G) mobile communication technology. In massive MIMO, the number of antennas of a base station and a terminal is large, which creates conditions for multi-stream space division multiplexing. And the space division multiplexing technology is adopted to send data to the terminal, thereby being beneficial to improving the spectrum efficiency.

However, the channel between the base station and the terminal typically contains multiple paths, and the same data stream experiences different fading to reach the terminal over different paths. Different data streams usually reach the terminal through different multipaths, which may cause the signal strength difference of each stream when reaching the terminal to be large, which may result in low overall demodulation performance of the data streams, and further cause low spectral efficiency of space division multiplexing.

Disclosure of Invention

The embodiment of the application provides a stream processing method and a stream processing device, which determine transmission information of a plurality of space division multiplexing streams through first information, and are beneficial to improving the overall demodulation performance of the plurality of space division multiplexing streams, so that the spectral efficiency of space division multiplexing is improved.

In a first aspect, an embodiment of the present application provides a stream processing method, where the method includes: the network equipment acquires transmission information of a plurality of space division multiplexing streams; according to the transmission information of the space division multiplexing streams, the first physical downlink shared channel PDSCH is sent to the terminal equipment; the plurality of spatial division multiplexing streams are carried on the first PDSCH; transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each spatial multiplexing stream, the reference signal received power RSRP corresponding to each spatial multiplexing stream, and the channel information of the first PDSCH.

In the technical scheme, the transmission information of the plurality of space division multiplexing streams is determined according to the first information, and the first information can reflect the signal strength of each space division multiplexing stream when the space division multiplexing stream reaches the terminal equipment to a certain extent. Therefore, the network device sends the first PDSCH to the terminal device according to the transmission information of the plurality of spatial division multiplexing streams, which is beneficial to reducing the signal intensity difference of each spatial division multiplexing stream when reaching the terminal device, thereby being beneficial to optimizing the overall demodulation performance of the plurality of spatial division multiplexing streams, and improving the spectral efficiency of spatial division multiplexing.

In one implementation, the transmission information for the plurality of spatial division multiplexed streams may include at least one of: a power coefficient for each spatial division multiplexed stream; each space division multiplexed stream mapped codeword.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the specific implementation of the network device acquiring the transmission information of the plurality of space division multiplexing streams may be: transmission information of a plurality of space division multiplexed streams from the aforementioned terminal device is received.

In one implementation manner, the specific implementation manner of the network device acquiring the transmission information of the plurality of space division multiplexing streams may be: the network device determines transmission information of the plurality of space division multiplexed streams based on the first information.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the method may further comprise: the network equipment sends measurement information to the terminal equipment, wherein the measurement information is used for the terminal equipment to determine first information; the network device receives the first information from the terminal device.

In one implementation, the measurement information includes reference signals of antenna ports corresponding to the second PDSCH or each spatial division multiplexing stream; the second PDSCH carries the plurality of spatial division multiplexing streams; the transmission time of the second PDSCH is before the transmission time of the first PDSCH.

In one implementation, the measurement information includes a reference signal of an antenna port corresponding to each space division multiplexing stream; each reference signal is obtained by weighting a weight value of a space division multiplexing stream corresponding to the reference signal in the first PDSCH, or each reference signal is obtained by weighting a precoding matrix PMI fed back by the terminal device.

In one implementation, the measurement information includes a second PDSCH; the method further comprises the following steps: and the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating the terminal equipment to determine first information according to the second PDSCH.

In one implementation, the transmission information for the plurality of spatial division multiplexed streams includes a power coefficient for each spatial division multiplexed stream; the plurality of spatial division multiplexed streams includes at least a first spatial division multiplexed stream and a second spatial division multiplexed stream; if the signal-to-noise ratio of the first spatial multiplexing stream is smaller than the signal-to-noise ratio of the second spatial multiplexing stream, the power coefficient of the first spatial multiplexing stream may be larger than the power coefficient of the second spatial multiplexing stream; or, if the RSRP corresponding to the first spatial division multiplexing stream is smaller than the RSRP corresponding to the second spatial division multiplexing stream, the power coefficient of the first spatial division multiplexing stream may be larger than the power coefficient of the second spatial division multiplexing stream.

In the technical scheme, the smaller the signal-to-noise ratio (or RSRP), the larger the power coefficient of the space division multiplexing stream is, the larger the transmission power of the network device when transmitting the space division multiplexing stream can be, which is further beneficial to improving the signal strength of the space division multiplexing stream when reaching the terminal device. The smaller the power coefficient of the space division multiplexed stream, the larger the signal-to-noise ratio (or RSRP), the smaller the transmission power when the network device transmits the space division multiplexed stream can be made. Therefore, the signal intensity difference of the plurality of space division multiplexing streams when reaching the terminal equipment is small, the overall demodulation performance of the plurality of space division multiplexing streams is optimized, and the space division multiplexing spectrum efficiency is improved.

In one implementation, the transmission information of the plurality of spatial division multiplexing streams includes a codeword mapped to each spatial division multiplexing stream; the aforementioned first information includes a signal-to-noise ratio of each spatial division multiplexed stream; the code word mapped by the space division multiplexing stream can be a first code word or a second code word; wherein, the absolute value of the difference between the signal-to-noise ratio of each space division multiplexing stream mapped to the first code word and the signal-to-noise ratio of the third space division multiplexing stream is less than a first preset value; the absolute value of the difference between the signal-to-noise ratio of each space division multiplexing stream mapped to the second code word and the signal-to-noise ratio of the third space division multiplexing stream is greater than or equal to the first preset value; the signal-to-noise ratio of the third spatial multiplexed stream is the largest or smallest among the aforementioned plurality of spatial multiplexed streams.

In the technical scheme, the signal-to-noise ratios of the space division multiplexing streams mapped to the same code word are relatively similar, so that the received signal strength difference of the space division multiplexing streams mapped to the same code word is favorably reduced, the overall demodulation performance of a plurality of space division multiplexing streams is favorably optimized, and the spectral efficiency of space division multiplexing is improved.

In one implementation, the transmission information of the plurality of spatial division multiplexing streams includes a codeword mapped to each spatial division multiplexing stream; the first information comprises RSRP corresponding to each space division multiplexing stream; the code word mapped by the space division multiplexing stream is a third code word or a fourth code word; wherein, the absolute value of the difference between the RSRP corresponding to each space division multiplexing stream mapped to the third codeword and the RSRP corresponding to the fourth space division multiplexing stream is less than a second preset value; the RSRP corresponding to each space division multiplexing stream mapped to the fourth codeword has an absolute value greater than or equal to the second preset value; among the plurality of spatial multiplexing streams, the RSRP corresponding to the fourth spatial multiplexing stream is the maximum or the minimum.

In the technical scheme, the corresponding RSRPs of the space division multiplexing streams mapped on the same code word are relatively similar, so that the received signal strength difference of the space division multiplexing streams mapped on the same code word is favorably reduced, the integral demodulation performance of a plurality of space division multiplexing streams is favorably optimized, and the spectral efficiency of space division multiplexing is improved.

In one implementation, the transmission information of the plurality of spatial division multiplexing streams includes a power coefficient of each spatial division multiplexing stream; the first information includes channel information of the first PDSCH; the method may further comprise: the network device sends second indication information to the terminal device, wherein the second indication information is used for indicating the terminal device to send an uplink Sounding Reference Signal (SRS); receiving an SRS from the terminal equipment; determining channel information of the first PDSCH according to the SRS; a specific implementation manner of determining, by the network device, the transmission information of the plurality of space division multiplexing streams according to the first information may be: for each space division multiplexing stream, the network device determines a power coefficient of the space division multiplexing stream according to the channel information of the first PDSCH and the weight of the space division multiplexing stream in the first PDSCH.

In a second aspect, an embodiment of the present application provides another stream processing method, including: the terminal equipment receives a first PDSCH from the network equipment, wherein the first PDSCH carries a plurality of space division multiplexing streams; the first PDSCH is transmitted according to transmission information of the plurality of spatial division multiplexing streams; transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each spatial multiplexing stream, the reference signal received power RSRP corresponding to each spatial multiplexing stream, and the channel information of the first PDSCH.

In the technical scheme, the transmission information of the plurality of space division multiplexing streams is determined according to the first information, and the first information can reflect the signal strength of each space division multiplexing stream when the space division multiplexing stream reaches the terminal equipment to a certain extent. Therefore, the network device sends the first PDSCH according to the transmission information of the plurality of spatial division multiplexing streams, which is beneficial to reducing the signal intensity difference of each spatial division multiplexing stream when reaching the terminal device, thereby being beneficial to optimizing the overall demodulation performance of the plurality of spatial division multiplexing streams, and improving the spectral efficiency of spatial division multiplexing.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the method may further comprise: the terminal device determines transmission information of a plurality of space division multiplexing streams according to the first information; and transmits transmission information of the plurality of space division multiplexed streams to the network device.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the method may further comprise: the terminal equipment receives measurement information from the network equipment; determining first information according to the measurement information; and sending the first information to the network equipment.

In one implementation, the measurement information includes a second PDSCH; the method further comprises the following steps: and the terminal equipment receives first indication information from the network equipment, wherein the first indication information is used for indicating the terminal equipment to determine first information according to the second PDSCH.

In one implementation, the transmission information of the plurality of spatial division multiplexing streams includes a power coefficient of each spatial division multiplexing stream; the first information includes channel information of the first PDSCH; the method may further comprise: the terminal equipment receives second indication information from the network equipment, wherein the second indication information is used for indicating the terminal equipment to send an uplink Sounding Reference Signal (SRS); the SRS is used for determining channel information of the first PDSCH; for each space division multiplexing stream, determining the power coefficient of the space division multiplexing stream by the channel information of the first PDSCH and the weight of the space division multiplexing stream in the first PDSCH; the terminal device sends the SRS to the network device.

In a third aspect, the present application provides a communication apparatus, where the communication apparatus has some or all of the functions of the network device in the method example described in the first aspect, for example, the functions of the communication apparatus may have the functions in some or all of the embodiments in the present application, or may have the functions of implementing any of the embodiments in the present application separately. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In one implementation, the communication device may include a processing unit and a communication unit in a structure, where the processing unit is configured to support the communication device to execute corresponding functions in the above method. The communication unit is used for supporting communication between the communication device and other equipment. The communication device may further comprise a memory unit for coupling with the processing unit and the communication unit, which saves computer programs and data necessary for the communication device.

In one implementation, the communication device includes: a processing unit configured to acquire transmission information of a plurality of space division multiplexing streams; the plurality of space division multiplexing streams are carried on a first Physical Downlink Shared Channel (PDSCH); transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each space division multiplexing stream, the Reference Signal Received Power (RSRP) corresponding to each space division multiplexing stream and the channel information of the first PDSCH; a communication unit configured to transmit the first PDSCH to a terminal device according to transmission information of the plurality of spatial division multiplexing streams.

As an example, the processing unit may be a processor, the communication unit may be a transceiver or a communication interface, and the storage unit may be a memory.

In one implementation, the communication device includes: a processor for acquiring transmission information of a plurality of space division multiplexed streams; the plurality of space division multiplexing streams are carried on a first Physical Downlink Shared Channel (PDSCH); transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each space division multiplexing stream, the Reference Signal Received Power (RSRP) corresponding to each space division multiplexing stream and the channel information of the first PDSCH; a transceiver configured to transmit the first PDSCH to a terminal device according to transmission information of the plurality of spatial division multiplexing streams.

In a fourth aspect, the present application provides another communication apparatus, where the communication apparatus has some or all of the functions of the terminal device in the method example described in the second aspect, for example, the functions of the communication apparatus may have the functions in some or all of the embodiments in the present application, or may have the functions of implementing any of the embodiments in the present application separately. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In one implementation, the communication device may include a communication unit and a processing unit configured to support the communication device to perform the corresponding functions of the above method. The communication unit is used for supporting communication between the communication device and other equipment. The communication device may further comprise a memory unit for coupling with the processing unit and the communication unit, which saves computer programs and data necessary for the communication device.

In one implementation, the communication device includes: a communication unit, configured to receive a first PDSCH from a network device, the first PDSCH carrying multiple spatial division multiplexing streams; the first PDSCH is transmitted according to transmission information of the plurality of spatial division multiplexing streams; transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each space division multiplexing stream, the Reference Signal Received Power (RSRP) corresponding to each space division multiplexing stream and the channel information of the first PDSCH; a processing unit, configured to demodulate the first PDSCH to obtain the multiple spatial division multiplexing streams.

In one implementation, the communication device includes: a transceiver configured to receive a first PDSCH from a network device, the first PDSCH carrying multiple spatial division multiplexed streams; the first PDSCH is transmitted according to transmission information of the plurality of spatial division multiplexing streams; transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each space division multiplexing stream, the Reference Signal Received Power (RSRP) corresponding to each space division multiplexing stream and the channel information of the first PDSCH; a processor configured to demodulate the first PDSCH to obtain the plurality of spatial division multiplexing streams.

In a fifth aspect, the present application provides a computer-readable storage medium storing a computer program, where the computer program includes program instructions, and the program instructions, when executed by a communication apparatus, cause the communication apparatus to execute the method of the first aspect.

In a sixth aspect, the present application provides another computer-readable storage medium, which stores a computer program, where the computer program includes program instructions, and the program instructions, when executed by a communication device, cause the communication device to execute the method of the second aspect.

In a seventh aspect, the present application provides a computer program product including a computer program, which when run on a computer causes the computer to perform the method of the first aspect.

In an eighth aspect, the present application provides another computer program product including a computer program, which when run on a computer causes the computer to perform the method of the second aspect.

In a ninth aspect, embodiments of the present application provide a chip system, where the chip system includes at least one processor and an interface, and is configured to support a network device to implement the functions according to the first aspect, for example, to determine or process at least one of data and information related to the method. In one possible design, the system-on-chip further includes a memory for storing computer programs and data necessary for the network device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In a tenth aspect, embodiments of the present application provide another chip system, where the chip system includes at least one processor and an interface, and is used to support a terminal device to implement the functions related to the second aspect, for example, to determine or process at least one of data and information related to the method. In one possible design, the chip system further includes a memory for storing computer programs and data necessary for the terminal device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

Drawings

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

fig. 2 is a schematic flow chart of a stream processing method according to an embodiment of the present application;

fig. 3 is a schematic flow chart of another stream processing method provided in the embodiment of the present application;

fig. 4 is a schematic flow chart of another stream processing method provided in the embodiment of the present application;

fig. 5 is a schematic flow chart of another stream processing method provided in the embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

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

fig. 8 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

For ease of understanding, terms referred to in the present application will be first introduced.

1. Space Division Multiplexing (SDM)

The space division multiplexing technology is that a space is divided through an adaptive array antenna, different beams are formed in different directions, each beam can provide a unique channel without interference of other users, and the same frequency band can be reused in different spaces. The space division multiplexing stream referred to in the embodiments of the present application refers to a data stream transmitted from a network device to a terminal device using a space division multiplexing technique. Each spatial division multiplexed stream may be transmitted by multiple antennas in the network device, with the data transmitted by the multiple antennas being different.

2. Code word (code word)

Data sent from a Media Access Control (MAC) layer to a physical layer is organized in the form of Transport Blocks (TBs). One TB is channel coded into one codeword.

3. Antenna port

An antenna port refers to a logical port for transmission. It is noted that there is no one-to-one correspondence between antenna ports and physical antennas. Antenna ports can be distinguished by Reference Signals (RS): in the downlink, the downlink and the downlink reference signals are in one-to-one correspondence, and if one reference signal is transmitted through a plurality of physical antennas, the plurality of physical antennas correspond to the same antenna port; if two different reference signals are transmitted through the same physical antenna, the physical antenna corresponds to two independent antenna ports. The signals of one antenna port can be distributed to different physical antennas for transmission.

In order to better understand a stream processing method disclosed in the embodiment of the present application, a communication system to which the embodiment of the present application is applicable is first described below.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure. The communication system may include, but is not limited to, one terminal device and one network device, the number and form of the devices shown in fig. 1 are used for example and do not constitute a limitation to the embodiments of the present application, and in practical applications, two or more terminal devices and two or more network devices may be included. The communication system shown in fig. 1 includes a network device 101 and a terminal device 102 as an example.

The network device 101 may be configured to obtain transmission information of a plurality of spatial division multiplexing streams, and transmit the first PDSCH to the terminal device 102 (it may be understood that data of the first PDSCH is transmitted to the terminal device 102) according to the transmission information of the plurality of spatial division multiplexing streams. Accordingly, terminal device 102 may receive the first PDSCH from network device 101 (which may be understood as receiving data from the first PDSCH of network device 101). The plurality of spatial division multiplexing streams are all carried on a first Physical Downlink Shared Channel (PDSCH), that is, the plurality of spatial division multiplexing streams are transmitted to the same terminal device 102 through the first PDSCH. It should be noted that the spatial division multiplexing stream in the embodiment of the present application may be understood as one data channel, many data may be transmitted in the spatial division multiplexing stream, and data in the same spatial division multiplexing stream transmitted in the PDSCH of different time slots may be different.

The transmission information of the plurality of spatial division multiplexed streams may include information required to transmit the plurality of spatial division multiplexed streams. The transmission information of the plurality of spatial division multiplexed streams may be determined based on the first information. The first information may include one or more parameters that may reflect, to some extent, the signal strength of the respective spatial division multiplexed streams as they arrive at the terminal device 102. The first information may include, but is not limited to, any of: a signal-to-noise ratio of each spatial division multiplexing stream, a Reference Signal Receiving Power (RSRP) corresponding to each spatial division multiplexing stream, and channel information of the first PDSCH.

In the embodiment of the present application, the transmission information of the plurality of spatial division multiplexed streams is determined based on the first information, since the first information can reflect the signal strength of each spatial division multiplexed stream upon arrival at the terminal apparatus 102 to some extent. Therefore, the network device 101 transmits the first PDSCH to the terminal device 102 according to the transmission information of the plurality of spatial division multiplexing streams, which is beneficial to reducing the signal strength difference of each spatial division multiplexing stream when reaching the terminal device 102, thereby being beneficial to optimizing the overall demodulation performance of the plurality of spatial division multiplexing streams, and improving the spectral efficiency of spatial division multiplexing.

It should be noted that the technical solutions of the embodiments of the present application can be applied to various communication systems. For example: a Long Term Evolution (LTE) system, a fifth generation (5th generation, 5G) mobile communication system, a 5G New Radio (NR) system, or other future communication systems (e.g., a sixth generation (6G) mobile communication system). It should be further noted that the communication mode of the communication system applied in the technical solution of the embodiment of the present application may be supported by frequency-division duplex (FDD), time-division duplex (TDD), or both.

The network device 101 in the embodiment of the present application is an entity for transmitting or receiving signals on the network side. For example, the network device 101 may be an evolved NodeB (eNB), a transmission point (TRP), a next generation base station (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. It should be noted that the network device 101 has a plurality of physical antennas to support spatial multiplexing. The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices. The network device provided by the embodiment of the present application may be composed of a Central Unit (CU) and a Distributed Unit (DU), where the CU may also be referred to as a control unit (control unit), and a protocol layer of a network device, such as a base station, may be split by using a structure of CU-DU, functions of a part of the protocol layer are placed in the CU for centralized control, and functions of the remaining part or all of the protocol layer are distributed in the DU, and the DU is centrally controlled by the CU.

The terminal device 102 in the embodiment of the present application is an entity, such as a mobile phone, on the user side for receiving or transmitting signals. A terminal device may also be referred to as a terminal (terminal), a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc. The terminal device may be an automobile with a communication function, a smart automobile, a mobile phone (mobile phone), a wearable device, a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (self-driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wireless terminal supporting antenna selection or not supporting antenna selection, or the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

It should be understood that the communication system described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation to the technical solution provided in the embodiment of the present application, and as a person skilled in the art knows that along with the evolution of the system architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

The following describes a stream processing method and a communication apparatus provided in the present application in detail with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a schematic flow chart of a stream processing method according to an embodiment of the present disclosure. The main execution units in steps S201 to S202 are network devices or chips in the network devices, and the following description will take the network devices as the main execution units of the stream processing method as an example. As shown in fig. 2, the method may include, but is not limited to, the following steps:

step S201: the network equipment acquires transmission information of a plurality of space division multiplexing streams; the plurality of space division multiplexing streams are carried on a first Physical Downlink Shared Channel (PDSCH); transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each spatial multiplexing stream, the reference signal received power RSRP corresponding to each spatial multiplexing stream, and the channel information of the first PDSCH.

Wherein the plurality of space division multiplexed streams are data streams to be transmitted to the same terminal device.

In this embodiment, the network device may acquire the transmission information of the plurality of spatial division multiplexing streams by: the network device receives, from the terminal device, transmission information of the plurality of space division multiplexed streams, at which time the transmission information of the plurality of space division multiplexed streams is determined by the terminal device based on the first information (the execution procedure can be seen in the detailed description of step S301 in fig. 3); alternatively, the network device determines the transmission information of the plurality of spatial division multiplexing streams based on the first information (the execution procedure can be referred to the specific description of step S404 in fig. 4).

The transmission information of the plurality of spatial division multiplexed streams may include information required to transmit the plurality of spatial division multiplexed streams. In one implementation, the transmission information of the plurality of spatial division multiplexed streams may include, but is not limited to, at least one of: a power coefficient for each spatial division multiplexed stream, and a codeword mapped to each spatial division multiplexed stream. The power coefficient of the spatial division multiplexing stream may be used to determine the transmission power of the network device when transmitting the spatial division multiplexing stream.

In the embodiment of the present application, the terminal device may support one or more codewords. In an implementation manner, different spatial division multiplexing streams may be mapped to the same codeword or to different codewords, which is not limited in this embodiment of the present application. When a terminal device supports one codeword, the aforementioned plurality of spatial division multiplexed streams are mapped to the same codeword (i.e., the codeword supported by the terminal device). When the terminal device supports a plurality of codewords, each codeword may be mapped with a plurality of spatial division multiplexing streams; or, each code word is mapped with only one space division multiplexing stream; or, each codeword in a part of the codewords is mapped with a plurality of spatial division multiplexing streams, and each codeword in another part of the codewords is mapped with only one spatial division multiplexing stream, in other words, there are at least two spatial division multiplexing streams in the plurality of spatial division multiplexing streams that are mapped to the same codeword.

In the embodiment of the present application, the transmission information of the plurality of spatial division multiplexing streams is determined based on the first information. The first information may include one or more parameters that may reflect, to some extent, the signal strength of the respective spatial division multiplexed streams as they arrive at the terminal device. The first information may include, but is not limited to, any of: a signal-to-noise ratio of each spatial division multiplexing stream, a Reference Signal Receiving Power (RSRP) corresponding to each spatial division multiplexing stream, and channel information of the first PDSCH. The signal-to-noise ratio may refer to a signal-to-interference plus noise ratio (SINR) after equalization or an SINR before equalization. The post-equalization SINR refers to the SINR of the spatial division multiplexed stream actually received after passing through the receiver, and the pre-equalization SINR refers to the SINR of the spatial division multiplexed stream received before the receiver.

The larger the signal-to-noise ratio of the spatial division multiplexing stream is, the stronger the signal intensity of the spatial division multiplexing stream when the spatial division multiplexing stream reaches the terminal device can be considered; the smaller the signal-to-noise ratio of the space division multiplexed stream, the weaker the signal strength of the space division multiplexed stream at the time of arrival at the terminal device can be considered. The larger the RSRP corresponding to the space division multiplexing stream is, the stronger the signal strength of the space division multiplexing stream when the space division multiplexing stream reaches the terminal device can be considered; the smaller the RSRP corresponding to a space division multiplexed stream is, the weaker the signal strength of the space division multiplexed stream when it reaches the terminal device can be considered.

The channel information in the embodiment of the present application may also be referred to as Channel State Information (CSI), and the channel information may reflect a channel attribute of a communication link. The CSI may describe a fading factor of a signal on each transmission path, i.e. a value of each element in a channel gain matrix, such as signal scattering (scattering), fading or fading, distance fading (power fading), and other information. The CSI may adapt the communication system to current channel conditions, providing guarantees for high reliability, high rate communications in a multi-antenna system. In the embodiment of the present application, the channel information of the first PDSCH may include, but is not limited to, a channel matrix of the first PDSCH. Based on the channel matrix of the first PDSCH, it is advantageous to determine the signal strength of each spatial division multiplexed stream as transmitted to the terminal device over the first PDSCH.

In the embodiment of the present application, the transmission information of the plurality of space division multiplexed streams is determined based on the first information which can reflect the signal strength of each space division multiplexed stream upon arrival at the terminal device to some extent. Therefore, the network device sends the first PDSCH to the terminal device according to the transmission information of the plurality of spatial division multiplexing streams, which is beneficial to reducing the signal intensity difference of each spatial division multiplexing stream when reaching the terminal device, thereby being beneficial to optimizing the overall demodulation performance of the plurality of spatial division multiplexing streams, and improving the spectral efficiency of spatial division multiplexing.

Step S202: the network device transmits the first PDSCH to the terminal device according to the transmission information of the plurality of spatial division multiplexing streams.

Specifically, after acquiring the transmission information of the plurality of spatial division multiplexing streams, the network device may transmit the first PDSCH to the terminal device according to the transmission information of the plurality of spatial division multiplexing streams.

For example, when the transmission information of the plurality of space division multiplexed streams includes a power coefficient of each space division multiplexed stream, the network device may determine the transmission power at the time of transmitting the space division multiplexed stream from the power coefficients of the respective space division multiplexed streams. Or, for each space division multiplexing stream, the network device may weight the initial power coefficient of the space division multiplexing stream by using the power coefficient of the space division multiplexing stream to obtain the transmission power coefficient of the space division multiplexing stream; then, the transmission power when transmitting the spatial multiplexing stream is determined according to the transmission power coefficient and the total power of transmitting the first PDSCH. Wherein the initial power coefficients of the respective spatial division multiplexed streams may be set by the network device, e.g., the initial power coefficients of the respective spatial division multiplexed streams may be the same. It should be noted that the initial power coefficient of each space division multiplexing stream may be changed by a network device, and the initial power coefficients of the space division multiplexing streams may be the same or different, which is not limited in this embodiment of the present application.

In the embodiment of the present application, the network device may map the space division multiplexing stream to a codeword and then transmit the space division multiplexing stream to the terminal device through the codeword. Specifically, the network device may map the spatial division multiplexed stream to an antenna to transmit the spatial division multiplexed stream through the antenna. For example, when the transmission information of the multiple spatial division multiplexing streams includes a codeword mapped to each spatial division multiplexing stream, if the terminal device supports one or more codewords, the network device may modulate each codeword to generate a modulation symbol; combining modulation symbols of different code words to carry out layer mapping; and then, precoding the data after layer mapping, and mapping the data obtained after precoding to an antenna. Resource mapping is performed on each antenna, and Orthogonal Frequency Division Multiplexing (OFDM) symbols are generated and transmitted. It should be noted that, in the layer mapping process, the modulation symbols of one codeword can be mapped to one or more layers. After layer mapping, each layer corresponds to one space division multiplexing stream, and one space division multiplexing stream corresponds to one antenna port. Data of one layer may be mapped to one or more transmit antennas, and data of different layers may be mapped to the same transmit antenna or different transmit antennas, which is not limited in this embodiment. Layer mapping and precoding can be seen as two sub-processes of the "mapping codewords to transmit antennas" process. The layer mapping maps the codeword to one or more layers according to a preset rule. And precoding and mapping the data of each layer to a corresponding transmitting antenna for transmitting.

Accordingly, after receiving the first PDSCH from the network device, the terminal device may demodulate the first PDSCH, so as to obtain the multiple spatial multiplexing streams. Specifically, after receiving the first PDSCH, the terminal device may perform channel estimation on each spatial division multiplexing stream carried in the first PDSCH, and then perform joint demodulation on multiple spatial division multiplexing streams in the first PDSCH, so as to obtain the multiple spatial division multiplexing streams. Or, the terminal device may perform channel estimation on each codeword in the first PDSCH, and then demodulate each codeword separately to obtain a space division multiplexing stream mapped to each codeword.

It should be noted that, when at least two space division multiplexing streams are mapped to one codeword, and the received signal strength difference of each space division multiplexing stream in the at least two space division multiplexing streams is large, if a higher-order Modulation and Coding Scheme (MCS) is used, the error rate of the space division multiplexing stream with weak signal strength is high, which may result in a high decoding error rate of the entire codeword; using a lower order MCS results in a less spectral efficient overall codeword. In the embodiment of the present application, the received signal strength of a space division multiplexed stream refers to the signal strength of the space division multiplexed stream at the time of arrival at a terminal device.

In the case that the terminal device supports one codeword, the power coefficient of each of the plurality of spatial division multiplexed streams can be determined by the stream processing method provided by the embodiment of the present application. This is advantageous in reducing the difference in signal strength when the respective space division multiplexed streams within the codeword arrive at the terminal device even if a plurality of space division multiplexed streams are mapped to the same codeword. In the case that the terminal device supports multiple codewords, the stream processing method provided by the embodiment of the present application may determine a mapping relationship between the spatial multiplexing streams and the codewords, and/or may determine power coefficients of respective spatial multiplexing streams in the multiple spatial multiplexing streams. In this way, even if there are cases where a plurality of spatial division multiplexed streams are mapped to the same codeword, it is advantageous to reduce the difference in signal strength between codewords and/or within codewords when the respective spatial division multiplexed streams arrive at the terminal device.

In one implementation, after determining the power coefficient of each of the plurality of spatial division multiplexed streams, the plurality of spatial division multiplexed streams may be mapped to the same codeword for transmission. In this way, the purpose of reducing the signal strength difference of each space division multiplexing stream when reaching the terminal device can be achieved, and the power consumption for determining the mapping relation between the space division multiplexing streams and the code words is favorably reduced. In one implementation, after determining the mapping relationship between the spatial multiplexing streams and the codewords, the same transmission power may be allocated to each spatial multiplexing stream. In this way, the purpose of reducing the signal strength difference of each space division multiplexing stream when reaching the terminal device can be achieved, and the power consumption for determining the power coefficient of each space division multiplexing stream can be reduced.

Referring to fig. 3, fig. 3 is a flowchart of another stream processing method provided in this embodiment, where the method describes in detail how, when the first information includes a signal-to-noise ratio of each spatial multiplexing stream or an RSRP corresponding to each spatial multiplexing stream, the terminal device determines transmission information of multiple spatial multiplexing streams according to the first information, and feeds back the transmission information to the network device. The execution main bodies of steps S301 to S302 are terminal devices or chips in the terminal devices, and the execution main body of step S303 is a network device or a chip in the network device, and the following description will take the terminal devices and the network device as the execution main bodies of the stream processing method as an example. The method may include, but is not limited to, the steps of:

step S301: the terminal equipment determines the transmission information of a plurality of space division multiplexing streams according to the first information; the plurality of space division multiplexing streams are carried on a first Physical Downlink Shared Channel (PDSCH); the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the transmission information of the plurality of spatial division multiplexed streams includes at least one of: a power coefficient for each spatial division multiplexed stream and a codeword mapped to each spatial division multiplexed stream.

In the embodiment of the present application, when the first information includes a signal-to-noise ratio of each of the plurality of spatial division multiplexed streams or an RSRP corresponding to each of the plurality of spatial division multiplexed streams, the transmission information of the plurality of spatial division multiplexed streams may be determined by the terminal device according to the first information. It should be noted that each spatial division multiplexing stream mentioned in the embodiment of the present application refers to each of the plurality of spatial division multiplexing streams carried in the first PDSCH.

In one implementation, the power coefficient of the spatial division multiplexing stream may be determined according to a signal-to-noise ratio of the spatial division multiplexing stream or an RSRP corresponding to the spatial division multiplexing stream. For example, when the plurality of spatial division multiplexed streams includes at least a first spatial division multiplexed stream and a second spatial division multiplexed stream, if the signal-to-noise ratio of the first spatial division multiplexed stream is less than the signal-to-noise ratio of the second spatial division multiplexed stream, the power coefficient of the first spatial division multiplexed stream may be greater than the power coefficient of the second spatial division multiplexed stream; or, if RSRP corresponding to the first spatial division multiplexing stream is smaller than RSRP corresponding to the second spatial division multiplexing stream, the power coefficient of the first spatial division multiplexing stream may be larger than the power coefficient of the second spatial division multiplexing stream. In other words, the smaller the signal-to-noise ratio of a spatial division multiplexed stream, the larger the power coefficient of the spatial division multiplexed stream may be; the smaller the RSRP corresponding to the space division multiplexing stream is, the larger the power coefficient of the space division multiplexing stream may be. It can be considered that the signal-to-noise ratio of the spatial division multiplexing stream has an inverse relationship with the power coefficient, and the RSRP corresponding to the spatial division multiplexing stream has an inverse relationship with the power coefficient.

The smaller the signal-to-noise ratio of a space division multiplexed stream (or the smaller the RSRP corresponding to the space division multiplexed stream), the weaker the signal strength of the space division multiplexed stream when it reaches the terminal device can be considered. The larger the signal-to-noise ratio of the space division multiplexed stream (or the larger RSRP corresponding to the space division multiplexed stream), the stronger the signal strength of the space division multiplexed stream when it reaches the terminal device can be considered. Compared with the method for increasing the transmission power for the space division multiplexing stream with the larger signal to noise ratio (or RSRP), the method for increasing the transmission power for the space division multiplexing stream with the smaller signal to noise ratio (or RSRP) is beneficial to greatly improving the overall demodulation performance. This is because, for a space division multiplexed stream having a large signal-to-noise ratio (or RSRP), the signal strength of the space division multiplexed stream when it reaches the terminal device is sufficiently strong, the transmission power is increased, and the improvement of the overall demodulation performance is not so large.

In the embodiment of the present application, the smaller the signal-to-noise ratio (or RSRP), the larger the power coefficient of the spatial division multiplexing stream is, the larger the transmission power of the network device when transmitting the spatial division multiplexing stream is, which is further beneficial to improving the signal strength of the spatial division multiplexing stream when reaching the terminal device. The smaller the power coefficient of the space division multiplexed stream, the larger the signal-to-noise ratio (or RSRP), the smaller the transmission power when the network device transmits the space division multiplexed stream can be made. Therefore, the signal intensity difference of the plurality of space division multiplexing streams when reaching the terminal equipment is small, the overall demodulation performance of the plurality of space division multiplexing streams is optimized, and the space division multiplexing spectrum efficiency is improved. It should be noted that the first spatial multiplexing stream and the second spatial multiplexing stream may be mapped to the same codeword, or may be mapped to different codewords, which is not limited in this embodiment of the present application.

In one implementation, the terminal device may determine the power coefficient of the ith stream of the plurality of spatial division multiplexed streams according to the following formula:

wherein p is_iRepresents the power coefficient of the ith stream; r is the total number of space division multiplexed streams; gamma ray_iIs the signal-to-noise ratio of the ith stream or the RSRP corresponding to the ith stream.

In this embodiment of the present application, space division multiplexing streams with similar signal-to-noise ratios in the aforementioned multiple space division multiplexing streams may be mapped to the same codeword. In one implementation, the mapping relationship between the spatial division multiplexing streams and the codewords can be determined by: and selecting one space division multiplexing stream from the plurality of space division multiplexing streams as a reference object, comparing the rest space division multiplexing streams with the space division multiplexing streams as the reference object, and determining the mapping relation between the space division multiplexing streams and the code words according to the comparison result. For example, when the first information includes the snr of each spatial multiplexing stream, if the terminal device supports two codewords (e.g., a first codeword and a second codeword), the codeword mapped to the spatial multiplexing stream may be the first codeword or the second codeword. Wherein, the absolute value of the difference between the snr of each sdm stream mapped to the first codeword and the snr of the third sdm stream (i.e., the reference) is less than the first predetermined value; the absolute value of the difference between the signal-to-noise ratio of each space division multiplexing stream mapped to the second code word and the signal-to-noise ratio of the third space division multiplexing stream is greater than or equal to the first preset value; the signal-to-noise ratio of the third spatial multiplexed stream is the largest or smallest among the aforementioned plurality of spatial multiplexed streams. The spatial division multiplexed stream mapped to the first codeword and the spatial division multiplexed stream mapped to the second codeword constitute the plurality of spatial division multiplexed streams. It should be noted that the first codeword may be mapped with one or more spatial division multiplexing streams, and the second codeword may also be mapped with one or more spatial division multiplexing streams. In other words, the spatial division multiplexing streams with similar signal-to-noise ratios in the aforementioned multiple spatial division multiplexing streams may be mapped to the same codeword (e.g., a first codeword), and the remaining spatial division multiplexing streams in the multiple spatial division multiplexing streams may be mapped to another codeword (e.g., a second codeword).

Similarly, when the terminal device supports three codewords (such as codeword a, codeword b, and codeword c), the absolute value of the difference between the snr of each sdm stream mapped to codeword a and the snr of the third sdm stream is less than the preset value 1; the absolute value of the difference between the signal-to-noise ratio of each space division multiplexing stream mapped to the codeword b and the signal-to-noise ratio of the third space division multiplexing stream is greater than or equal to the preset value 1 and less than the preset value 2; the absolute value of the difference between the snr of each spatial multiplexing stream mapped to codeword c and the snr of the third spatial multiplexing stream is greater than or equal to the preset value 2. Wherein the preset value 1 is smaller than the preset value 2. It should be noted that the terminal device may also support 4 or more than 4 codewords, and the mapping relationship between the codewords and the spatial multiplexing stream may be determined by referring to the related content when the terminal device supports two or three codewords, which is not described herein again.

By the method, the signal-to-noise ratios of the space division multiplexing streams mapped to the same code word are relatively similar, so that the received signal strength difference of the space division multiplexing streams mapped to the same code word is favorably reduced, the integral demodulation performance of a plurality of space division multiplexing streams is favorably optimized, and the spectral efficiency of space division multiplexing is improved.

In this embodiment of the present application, space division multiplexing streams with similar signal-to-noise ratios in the aforementioned multiple space division multiplexing streams may be mapped to the same codeword. In one implementation, the mapping relationship between the spatial division multiplexing streams and the codewords can be determined by: and selecting one space division multiplexing stream from the plurality of space division multiplexing streams as a reference object, comparing the rest space division multiplexing streams with the space division multiplexing streams as the reference object, and determining the mapping relation between the space division multiplexing streams and the code words according to the comparison result. For example, when the first information includes RSRP corresponding to each spatial multiplexing stream, if the terminal device supports two codewords (e.g., a third codeword and a fourth codeword), the codeword mapped to the spatial multiplexing stream may be the third codeword or the fourth codeword. The absolute value of the difference between the RSRP corresponding to each space division multiplexing stream mapped to the third codeword and the RSRP corresponding to the fourth space division multiplexing stream (i.e., the reference) is smaller than a second preset value; the RSRP corresponding to each space division multiplexing stream mapped to the fourth codeword has an absolute value greater than or equal to the second preset value; among the plurality of spatial multiplexing streams, the RSRP corresponding to the fourth spatial multiplexing stream is the maximum or the minimum. The spatial division multiplexed stream mapped to the third codeword and the spatial division multiplexed stream mapped to the fourth codeword constitute the plurality of spatial division multiplexed streams. It should be noted that the third codeword may be mapped with one or more spatial division multiplexing streams, and the fourth codeword may also be mapped with one or more spatial division multiplexing streams. In other words, space division multiplexed streams with similar RSRP among the aforementioned plurality of space division multiplexed streams may be mapped to the same codeword (e.g., a third codeword), and the remaining space division multiplexed streams among the plurality of space division multiplexed streams may be mapped to another codeword (e.g., a fourth codeword).

Similarly, when the terminal device supports three codewords (such as codeword d, codeword e, and codeword f), the absolute value of the difference between the RSRP corresponding to each space division multiplexing stream mapped to codeword d and the RSRP corresponding to the fourth space division multiplexing stream is less than preset value 3; the RSRP corresponding to each space division multiplexing stream mapped to the codeword e, and the absolute values of the differences between the RSRPs corresponding to the fourth space division multiplexing stream are all greater than or equal to the preset value 3 and less than the preset value 4; the RSRP corresponding to each space division multiplexing stream mapped to the codeword f, and the absolute value of the difference between the RSRP corresponding to the fourth space division multiplexing stream are all greater than or equal to the preset value 4. Wherein the preset value 3 is smaller than the preset value 4. It should be noted that the terminal device may also support 4 or more than 4 codewords, and the mapping relationship between the codewords and the spatial multiplexing stream may be determined by referring to the related content when the terminal device supports two or three codewords, which is not described herein again.

By the mode, the corresponding RSRPs of the space division multiplexing streams mapped to the same code word are relatively similar, so that the received signal strength difference of the space division multiplexing streams mapped to the same code word is favorably reduced, the integral demodulation performance of a plurality of space division multiplexing streams is favorably optimized, and the spectral efficiency of space division multiplexing is improved.

It should be noted that the above manner of determining the mapping relationship between the spatial division multiplexing streams and the codewords by selecting one spatial division multiplexing stream as a reference is only for example and does not limit the embodiments of the present application, as long as the signal-to-noise ratio (or RSRP) of each spatial division multiplexing stream mapped to the same codeword is relatively similar. For example, in the case where a space division multiplexing stream is not selected as a reference, or the selected reference is not necessarily the aforementioned third space division multiplexing stream (or fourth space division multiplexing stream), the difference of the signal-to-noise ratios (or RSRPs) between the respective space division multiplexing streams mapped to the same codeword is made smaller than a threshold.

It should be further noted that the first preset value, the second preset value, and the preset values 1 to 5 may all be configured by a network device (for example, issued in a system message or a proprietary signaling), or may be agreed by a protocol, or may be set by a terminal device as a default, or may be set and changed by a user, which is not limited in this embodiment of the present application.

Step S302: the terminal device transmits transmission information of the plurality of space division multiplexed streams to the network device.

Specifically, after the terminal device determines the transmission information of the plurality of spatial division multiplexing streams, the transmission information of the plurality of spatial division multiplexing streams may be transmitted to the network device, so that the network device transmits the first PDSCH carrying the plurality of spatial division multiplexing streams to the terminal device according to the transmission information of the plurality of spatial division multiplexing streams.

Step S303: the network device transmits the first PDSCH to the terminal device according to the transmission information of the plurality of spatial division multiplexing streams.

It should be noted that, the execution process of step S303 can refer to the detailed description of step S202 in fig. 2, and is not described herein again.

By implementing the embodiment of the application, the signal intensity difference of the plurality of space division multiplexing streams when reaching the terminal equipment is smaller, so that the overall demodulation performance of the plurality of space division multiplexing streams is optimized, and the spectral efficiency of space division multiplexing is improved.

Referring to fig. 4, fig. 4 is a schematic flowchart of another flow processing method provided in this embodiment of the present application, where the method describes in detail how a terminal device determines first information when the first information includes a signal-to-noise ratio of each space division multiplexing flow or an RSRP corresponding to each space division multiplexing flow, and feeds back the first information to a network device; and how the network device determines transmission information of the plurality of space division multiplexed streams based on the first information. The execution main bodies of step S401, step S404 to step S405 are network devices or chips in the network devices, the execution main bodies of step S402 to step S403 are terminal devices or chips in the terminal devices, and the following description will take the terminal devices and the network devices as the execution main bodies of the stream processing method as an example. The method may include, but is not limited to, the steps of:

step S401: the network equipment sends measurement information to the terminal equipment, wherein the measurement information is used for the terminal equipment to determine first information; the first information comprises a signal-to-noise ratio of each space division multiplexing stream in a plurality of space division multiplexing streams or an RSRP corresponding to each space division multiplexing stream; the plurality of spatial division multiplexing streams are carried on a first Physical Downlink Shared Channel (PDSCH).

Wherein the measurement information may include a reference signal of an antenna port corresponding to each space division multiplexing stream in the plurality of space division multiplexing streams. In this embodiment, one space division multiplexing stream may correspond to one antenna port, and one antenna port may transmit one reference signal. The reference signal in the embodiment of the present application may refer to a channel state information reference signal (CSI-RS). In one implementation, each reference signal may be weighted by a weight of a spatial division multiplexing stream corresponding to the reference signal in the first PDSCH. Signals of one antenna port may be distributed to one or more physical antennas for transmission. The physical antennas have certain amplitude and phase when sending signals, when multiple physical antennas send the same pilot frequency sequence, the amplitude and phase of each physical antenna can be the same or different, and the pilot frequency sequences sent by the multiple physical antennas are superposed to obtain the reference signals sent by the antenna ports corresponding to the multiple physical antennas. Wherein, the weight of the spatial multiplexing stream in the first PDSCH may refer to the amplitude and phase of the aforementioned physical antennas. In another implementation manner, each reference signal may be obtained by weighting a Precoding Matrix (PMI) fed back by the terminal device. For example, in the case that the network device cannot determine the weight values of the spatial division multiplexing streams in the first PDSCH, each reference signal may be weighted by the PMI fed back by the terminal device. The fed-back PMI can be a PMI selected by the terminal equipment from a plurality of PMIs agreed by a protocol, and each element in the PMI means the amplitude and the phase of a physical antenna. It should be noted that the weight values of the spatial division multiplexing streams in the first PDSCH (i.e., the amplitude and phase of the physical antenna) may be determined by the network device, and the elements in the PMI (i.e., the amplitude and phase of the physical antenna) may be agreed by the 3GPP protocol.

In one implementation, the measurement information may include a second PDSCH carrying the plurality of spatial division multiplexed streams; the transmission time of the second PDSCH is before the transmission time of the first PDSCH. It should be noted that, when the network device may transmit a plurality of spatial division multiplexing streams on the second PDSCH, the transmission power of each spatial division multiplexing stream may be equal or different, which is not limited in this embodiment of the present application. It should be further noted that the data of the spatial division multiplexing streams transmitted on the first PDSCH and the second PDSCH may be the same or different, and this is not limited in this embodiment of the application. In one implementation, the network device may send first indication information to the terminal device, where the first indication information may be used to instruct the terminal device to determine the first information according to the second PDSCH. That is, the terminal device may wait to receive the second PDSCH from the network device after receiving the first indication information, determine the first information according to the second PDSCH, and feed the first information back to the network device or further determine the transmission information of the plurality of spatial division multiplexing streams according to the first information. In one implementation, the second PDSCH may be a PDSCH transmitted on a specific time slot (time), in which case the first indication information is specifically used for instructing the terminal device to determine the first information according to the second PDSCH transmitted on the specific time slot. It should be noted that the specific time slot may occur periodically or non-periodically, and the embodiment of the present application is not limited to this time slot.

In one implementation, the terminal device may support a reference signal measurement mode or a PDSCH measurement mode for a particular time slot. The terminal equipment supports reference signal measurement mode representation: the terminal device may determine the first information from the reference signal. The terminal device supports the PDSCH measurement mode of a specific time slot to indicate that: the terminal device supports determining the first information based on a PDSCH transmitted on a specific time slot (i.e., the second PDSCH). In one implementation, the network device may send indication information 1 to the terminal device, where the indication information 1 may be used to instruct the terminal device to turn on the reference signal measurement mode. Alternatively, the network device may send indication information 2 to the terminal device, where the indication information 2 may be used to instruct the terminal device to turn on the PDSCH measurement mode for a specific time slot.

It should be noted that the first indication information, the indication information 1 and the indication information 2 may be carried in Radio Resource Control (RRC) signaling or Downlink Control Information (DCI), and the embodiment of the present invention is not limited thereto.

Step S402: the terminal equipment determines the first information according to the measurement information.

Specifically, after receiving the measurement information from the network device, the terminal device may determine first information according to the measurement information, where the first information may include a signal-to-noise ratio of each of the plurality of spatial division multiplexing streams or an RSRP corresponding to each spatial division multiplexing stream. For example, when the measurement information is the CSIRS (or the second PDSCH) of the antenna port corresponding to each spatial multiplexing stream in the plurality of spatial multiplexing streams, the terminal device measures the reference signal (or the second PDSCH), and may determine the signal-to-noise ratio of the spatial multiplexing stream corresponding to each antenna port. For example, the terminal device may determine the SINR of the ith stream of the plurality of spatially multiplexed streams by the following formula, where SINR refers to the equalized SINR:

when the measurement information is CSIRS, H represents a CSIRS channel matrix measured by the terminal equipment; when the measurement information is the second PDSCH, H represents a channel matrix of the second PDSCH measured by the terminal equipment; h may be obtained from channel estimation. H^HA conjugate transpose matrix representing the channel matrix H; (H)^HH)^-1Representation matrix (H)^HH) The inverse matrix of (d);

representation matrix (H)^HH)^-1Row i and column i; n is₀Representing the noise floor of the terminal device.

For another example, the terminal device may determine the SINR of the ith stream in the plurality of spatial division multiplexed streams by the following formula, where SINR refers to the equalized SINR:

wherein N is_rThe number of receiving antennas in the terminal equipment; when the measurement information is CSIRS, H_t,iThe t-th receiving antenna of the terminal equipment receives the channel matrix of the CSIRS sent by the i-th antenna port; when the measurement information is the second PDSCH, H_t,iA channel matrix indicating that the t-th receiving antenna of the terminal device receives a signal (i.e. a certain stream carried in the second PDSCH) transmitted by the i-th antenna port; h_t,iMay be obtained from channel estimates. Matrix H_t,iThe element in (A) is complex number, | H_t,iI represents the pair matrix H_t,iModulo of each complex element in (a). E.g. H_t,iWhere a and b are real numbers, a is a real part, b is an imaginary part, and i (different from the index i of the antenna port and the spatial multiplexing stream) is an imaginary unit. The result of modulo the element z is

n₀Representing the noise floor of the terminal device.

When the measurement information is the CSIRS (or the second PDSCH) of the antenna port corresponding to each spatial division multiplexing stream in the plurality of spatial division multiplexing streams, the terminal device measures the reference signal (or the second PDSCH), and may determine the RSRP corresponding to the spatial division multiplexing stream (corresponding to each antenna port). Specifically, the terminal device may determine RSRP corresponding to an ith stream in the plurality of space division multiplexing streams by using the following formula:

wherein N is_rThe number of receiving antennas in the terminal equipment; when the measurement information is CSIRS, H_t,iThe t-th receiving antenna of the terminal equipment receives the channel matrix of the CSIRS sent by the i-th antenna port; when the measurement information is the second PDSCH, H_t,iA channel matrix indicating that the t-th receiving antenna of the terminal device receives a signal (i.e. a certain stream carried in the second PDSCH) transmitted by the i-th antenna port; h_t,iMay be obtained from channel estimates. Matrix H_t,iThe element in (A) is complex number, | H_t,iI represents the pair matrix H_t,iModulo of each complex element in (1); n is₀Representing the noise floor of the terminal device.

Step S403: and the terminal equipment sends the first information to the network equipment.

Specifically, after the terminal device determines the first information, the first information may be fed back to the network device, so that the network device determines the transmission information of the plurality of spatial division multiplexing streams according to the first information.

Step S404: the network device determines transmission information of the plurality of space division multiplexing streams based on the first information.

Specifically, after the network device receives the first information from the terminal device, the transmission information of the plurality of spatial division multiplexing streams may be determined based on the first information. It should be noted that, the execution procedure of determining, by the network device, the transmission information of the multiple spatial division multiplexing streams according to the first information is the same as the execution procedure of determining, by the terminal device, the transmission information of the multiple spatial division multiplexing streams according to the first information, and reference may be made to the specific description of step S301 in fig. 3, which is not described again here.

Step S405: the network device transmits the first PDSCH to the terminal device according to the transmission information of the plurality of spatial division multiplexing streams.

In one implementation, step S403 may be performed instead by: the terminal device determines a power coefficient of each space division multiplexed stream based on the first information, and transmits the power coefficient of each space division multiplexed stream to the network device. Step S404 may be performed instead by: after the network device receives the power coefficient of each space division multiplexing stream fed back by the terminal device, the network device may determine a mapping relationship between the space division multiplexing streams and the codewords according to the power coefficient of each space division multiplexing stream. If the terminal device supports two codewords (e.g., codeword a and codeword B), that is, the codeword mapped to the spatial division multiplexing stream may be the codeword a or the codeword B, the network device may determine the mapping relationship between the spatial division multiplexing stream and the codeword by: and converting the power coefficient of the space division multiplexing stream into a dB domain, mapping the space division multiplexing stream of which the absolute value of the difference between the power coefficient of the dB domain and the power coefficient of the dB domain of the fifth space division multiplexing stream is less than a third preset value to a code word A, and mapping the space division multiplexing stream of which the absolute value of the difference between the power coefficient of the dB domain and the power coefficient of the dB domain of the fifth space division multiplexing stream is greater than or equal to the third preset value to a code word B. Among the aforementioned plurality of spatial division multiplexed streams, the fifth spatial division multiplexed stream has the largest or smallest power coefficient in the dB domain. The space division multiplexed stream mapped to the codeword a and the space division multiplexed stream mapped to the codeword B constitute the aforementioned plurality of space division multiplexed streams. It should be noted that, the codeword a may be mapped with one or more spatial multiplexing streams, and the codeword B may also be mapped with one or more spatial multiplexing streams. In other words, the space division multiplexing streams with similar dB domain power coefficients in the plurality of space division multiplexing streams may be mapped to the same codeword (e.g., codeword a), and the remaining space division multiplexing streams in the plurality of space division multiplexing streams may be mapped to another codeword (e.g., codeword B).

It should be noted that the above-mentioned manner of determining the mapping relationship between the spatial multiplexing stream and the codeword by selecting one spatial multiplexing stream (i.e., the fifth spatial multiplexing stream) as a reference is only used as an example, and does not constitute a limitation to the embodiment of the present application, as long as the dB domain power coefficients of each spatial multiplexing stream mapped to the same codeword are relatively similar. For example, in the case where one spatial division multiplexed stream is not selected as a reference, or in the case where the selected reference is not necessarily the aforementioned fifth spatial division multiplexed stream, the difference of the dB domain power coefficients between the respective spatial division multiplexed streams mapped to the same codeword is made smaller than a certain threshold.

It should be further noted that the third preset value may be configured by the network device (for example, issued in a system message or a proprietary signaling), or may be agreed by a protocol, or may be set by default by the terminal device, or may be set and changed by a user, which is not limited in this embodiment of the application.

Referring to fig. 5, fig. 5 is a flowchart of another stream processing method provided in this embodiment, which details how a network device determines channel information of a first PDSCH and determines a power coefficient of each spatial multiplexing stream according to the channel information of the first PDSCH when transmission information of multiple spatial multiplexing streams includes the power coefficient of each spatial multiplexing stream and the first information includes the channel information of the first PDSCH. The execution subjects of steps S501, S503 to S505 are network devices or chips in the network devices, the execution subject of step S502 is a terminal device or a chip in the terminal device, and the following description will take the terminal device and the network device as the execution subjects of the stream processing method as an example. The method may include, but is not limited to, the steps of:

step S501: the network device sends second indication information to the terminal device, where the second indication information is used to indicate the terminal device to send an uplink Sounding Reference Signal (SRS).

In an implementation manner, the second indication information may be specifically used to instruct the terminal device to transmit the SRS through an independent antenna, that is, to transmit the SRS through a single antenna. When the terminal device has a plurality of transmitting antennas and the network device knows information such as amplitudes and phases of the plurality of transmitting antennas in advance, the second indication information may specifically indicate the terminal device to transmit the SRS through the plurality of antennas.

Step S502: and the terminal equipment transmits the SRS to the network equipment.

Specifically, after receiving the second indication information from the network device, the terminal device may send the SRS.

Step S503: the network equipment determines the channel information of the first PDSCH according to the SRS.

Specifically, after receiving the SRS from the terminal device, the network device may determine the channel information of the first PDSCH according to the SRS. In the embodiment of the present application, the channel information of the first PDSCH may include, but is not limited to, a channel matrix of the first PDSCH.

In one implementation, the network device may determine the channel matrix of the first PDSCH by:

1. network equipment measures channel matrix H of SRS_srs；

2. Channel matrix H from SRS_srsDetermining a channel matrix for a downlink channel (i.e., a first PDSCH)

Wherein the superscript T represents the pairing matrix H_srsAnd (5) performing transposition.

Step S504: for each space division multiplexing stream in the plurality of space division multiplexing streams, the network equipment determines the power coefficient of the space division multiplexing stream according to the channel information of the first PDSCH and the weight of the space division multiplexing stream in the first PDSCH; the plurality of spatial division multiplexing streams are carried on the first PDSCH.

In this embodiment, when the first information includes channel information of the first PDSCH and the transmission information of the multiple spatial division multiplexing streams includes a power coefficient of each spatial division multiplexing stream, a specific implementation that the network device determines the transmission information of the multiple spatial division multiplexing streams according to the first information may be: for each space division multiplexing stream, the network device determines a power coefficient of the space division multiplexing stream according to the channel information of the first PDSCH and the weight of the space division multiplexing stream in the first PDSCH. Optionally, when the channel information of the first PDSCH refers to the channel matrix of the first PDSCH, the network device may determine the power coefficient of each spatial multiplexing stream by: h based on estimation_DLDetermining a power coefficient of an ith stream of the plurality of space division multiplexed streams as: p is a radical of_i＝(H_DL,W_i) Wherein W is_iMay represent a weight of an ith stream carried in the first PDSCH; the function f may be:

wherein r represents the number of spatial division multiplexing streams carried in the first PDSCH; matrix H_DLW_iThe element in (A) is complex number, | H_DLW_iI represents the pair matrix H_DLW_iModulo of each complex element in (1); the mean () function represents taking all elements in parentheses (i.e. | H)_DLW_j|²) Average value of (a).

Step S505: the network device transmits the first PDSCH to the terminal device according to the power coefficient of each of the plurality of spatial division multiplexed streams.

It should be noted that, the execution process of step S505 can refer to the detailed description of step S202 in fig. 2, and is not described herein again.

In the embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspective of a network device and a terminal device, respectively. In order to implement the functions in the method provided by the embodiment of the present application, the network device and the terminal device may include a hardware structure and a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Some of the above functions may be implemented by a hardware structure, a software module, or a hardware structure plus a software module.

Fig. 6 is a schematic structural diagram of a communication device 60 according to an embodiment of the present disclosure. The communication device 60 shown in fig. 6 may include a processing unit 601 and a communication unit 602. The communication unit 602 may include a transmitting unit for implementing a transmitting function and/or a receiving unit for implementing a receiving function, and the communication unit 602 may implement a transmitting function and/or a receiving function. The communication unit may also be described as a transceiver unit.

The communication device 60 may be a network device, a device in the network device, or a device that can be used in cooperation with the network device. Alternatively, the communication device 60 may be a terminal device, a device in the terminal device, or a device that can be used in cooperation with the terminal device.

The communication device 60 is a network device: a processing unit 601 configured to acquire transmission information of a plurality of spatial division multiplexing streams; the plurality of space division multiplexing streams are carried on the first Physical Downlink Shared Channel (PDSCH); transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each spatial division multiplexed stream; reference Signal Received Power (RSRP) corresponding to each space division multiplexing stream; channel information of the first PDSCH; a communication unit 602, configured to transmit the first PDSCH to the terminal device according to the transmission information of the plurality of spatial division multiplexing streams.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the processing unit 601 may also be configured to invoke the communication unit 602 to receive transmission information of a plurality of space division multiplexed streams from the aforementioned terminal device.

In one implementation, the processing unit 601 may be further configured to determine transmission information of a plurality of space division multiplexing streams according to the first information.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the communication unit 602 may further be configured to send measurement information to the terminal device, where the measurement information is used by the terminal device to determine the first information; the communication unit 602 may also be configured to receive the first information from the terminal device.

In one implementation, the measurement information includes a second PDSCH; the communication unit 602 may further be configured to send first indication information to the terminal device, where the first indication information is used to instruct the terminal device to determine the first information according to the second PDSCH.

In one implementation, the transmission information of the plurality of spatial division multiplexing streams includes a power coefficient of each spatial division multiplexing stream; the first information includes channel information of the first PDSCH; the communication unit 602 may be further configured to send second indication information to the terminal device, where the second indication information is used to indicate the terminal device to send an uplink sounding reference signal SRS; the communication unit 602 may also be configured to receive an SRS from the terminal device; the processing unit 601 may be further configured to determine channel information of the first PDSCH according to the SRS; and for each space division multiplexing stream, determining the power coefficient of the space division multiplexing stream according to the channel information of the first PDSCH and the weight of the space division multiplexing stream in the first PDSCH.

The communication device 60 is a terminal apparatus: a communication unit 602, configured to receive a first PDSCH from a network device, where the first PDSCH carries multiple spatial division multiplexing streams; the first PDSCH is transmitted according to transmission information of the plurality of spatial division multiplexing streams; transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each spatial division multiplexed stream; reference Signal Received Power (RSRP) corresponding to each space division multiplexing stream; channel information of the first PDSCH; processing unit 601 is configured to demodulate the first PDSCH to obtain the multiple spatial division multiplexing streams.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the processing unit 601 may be further configured to determine transmission information of a plurality of space division multiplexing streams according to the first information; the communication unit 602 may also be configured to transmit transmission information of the plurality of space division multiplexed streams to the network device.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the communication unit 602 may also be configured to receive measurement information from a network device; the processing unit 601 may be further configured to determine first information according to the measurement information; the communication unit 602 may also be configured to send the first information to the network device.

In one implementation, the measurement information includes a reference signal of an antenna port corresponding to each space division multiplexing stream; each reference signal is obtained by weighting the weight of the space division multiplexing stream corresponding to the reference signal in the first PDSCH, or each reference signal is obtained by weighting the precoding matrix PMI fed back by the communication apparatus 60.

In one implementation, the measurement information includes a second PDSCH; the communication unit 602 may be further configured to receive first indication information from the network device, where the first indication information is used to instruct the communication apparatus 60 to determine the first information according to the second PDSCH.

In one implementation, the transmission information of the plurality of spatial division multiplexing streams includes a power coefficient of each spatial division multiplexing stream; the first information includes channel information of the first PDSCH; the communication unit 602 may further be configured to receive second indication information from the network device, where the second indication information is used to instruct the communication apparatus 60 to transmit the uplink sounding reference signal SRS; the SRS is used for determining channel information of the first PDSCH; for each space division multiplexing stream, determining the power coefficient of the space division multiplexing stream by the channel information of the first PDSCH and the weight of the space division multiplexing stream in the first PDSCH; the communication unit 602 may also be configured to transmit the SRS to the network device.

Referring to fig. 7, fig. 7 is a schematic structural diagram of another communication device 70 according to an embodiment of the present disclosure. The communication device 70 may be a network device, a terminal device, a chip, a system-on-chip, or a processor that supports the network device to implement the method, or a chip, a system-on-chip, or a processor that supports the terminal device to implement the method. The apparatus may be configured to implement the method described in the method embodiment, and refer to the description in the method embodiment.

The communication device 70 may include one or more processors 701. The processor 701 may be a general purpose processor or a special purpose processor, etc. For example, a baseband processor or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control a communication device (e.g., a base station, a baseband chip, a terminal chip, a DU or CU, etc.), execute a computer program, and process data of the computer program.

Optionally, the communication device 70 may comprise one or more memories 702 on which a computer program 703 may be stored, which computer program may be run on the communication device 70, such that the communication device 70 performs the methods described in the above method embodiments. Optionally, the memory 702 may further store data therein. The communication device 70 and the memory 702 may be provided separately or may be integrated together.

Optionally, the communication device 70 may further include a transceiver 704 and an antenna 705. The transceiver 704 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc. for implementing a transceiving function. The transceiver 704 may include a receiver and a transmitter, and the receiver may be referred to as a receiver or a receiving circuit, etc. for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmission circuit, etc. for implementing the transmission function.

The communication device 70 is a network device: the processor 701 is configured to execute step S201 in fig. 2; step S404 in fig. 4 is executed; or performs step S503 and step S504 in fig. 5. The transceiver 704 is configured to perform step S202 in fig. 2; step S303 in fig. 3 is performed; step S401 and step S405 in fig. 4 are executed; or performs steps S501 and S505 in fig. 5.

The communication device 70 is a terminal apparatus: the processor 701 is configured to execute step S301 in fig. 3; or performs step S402 in fig. 4. The transceiver 704 is configured to perform step S302 in fig. 3; step S403 in fig. 4 is performed; or performs step S502 in fig. 5.

In one implementation, a transceiver may be included in the processor 701 for performing receive and transmit functions. The transceiver may be, for example, a transceiver circuit, or an interface circuit. The transmit and receive circuitry, interfaces or interface circuitry used to implement the receive and transmit functions may be separate or integrated. The transceiver circuit, the interface circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit, the interface circuit or the interface circuit may be used for transmitting or transferring signals.

In one implementation, the processor 701 may have stored thereon a computer program 706, which computer program 706, when running on the processor 701, may cause the communication device 70 to perform the method described in the above method embodiments. The computer program 706 may be solidified in the processor 701, in which case the processor 701 may be implemented by hardware.

In one implementation, the communication device 70 may include circuitry that may implement the functionality of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described herein may be implemented on Integrated Circuits (ICs), analog ICs, Radio Frequency Integrated Circuits (RFICs), mixed signal ICs, Application Specific Integrated Circuits (ASICs), Printed Circuit Boards (PCBs), electronic devices, and the like. The processor and transceiver may also be fabricated using various IC process technologies, such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), Bipolar Junction Transistor (BJT), bipolar CMOS (bicmos), silicon germanium (SiGe), gallium arsenide (GaAs), and the like.

The communication apparatus in the above description of the embodiment may be a network device or a terminal device, but the scope of the communication apparatus described in the present application is not limited thereto, and the structure of the communication apparatus may not be limited by fig. 7. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication means may be:

(1) a stand-alone integrated circuit IC, or chip, or system-on-chip or subsystem;

(2) a set of one or more ICs, which optionally may also include storage means for storing data, computer programs;

(3) an ASIC, such as a Modem (Modem);

(4) a module that may be embedded within other devices;

(5) receivers, terminals, smart terminals, cellular phones, wireless devices, handsets, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, and the like;

(6) others, and so forth.

For the case that the communication device may be a chip or a system of chips, reference may be made to the schematic structure of the chip shown in fig. 8. The chip shown in fig. 8 includes a processor 801 and an interface 802. The number of the processors 801 may be one or more, and the number of the interfaces 802 may be more.

For the case that the chip is used to implement the functions of the network device in the embodiment of the present application:

a processor 801 configured to acquire transmission information of a plurality of space division multiplexing streams; the plurality of space division multiplexing streams are carried on the first Physical Downlink Shared Channel (PDSCH); transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each spatial division multiplexed stream; reference Signal Received Power (RSRP) corresponding to each space division multiplexing stream; channel information of the first PDSCH; an interface 802 for transmitting the first PDSCH to the terminal device according to the transmission information of the plurality of spatial division multiplexing streams.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the processor 801 may also be configured to invoke the interface 802 to receive transmission information of a plurality of space division multiplexed streams from the aforementioned terminal device.

In one implementation, the processor 801 may be further configured to determine transmission information of the plurality of spatial division multiplexing streams according to the first information.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the interface 802 may be further configured to send measurement information to the terminal device, where the measurement information is used by the terminal device to determine the first information; the interface 802 may also be used to receive first information from the terminal device.

In one implementation, the measurement information includes a second PDSCH; the interface 802 may be further configured to send first indication information to the terminal device, where the first indication information is used to instruct the terminal device to determine the first information according to the second PDSCH.

In one implementation, the transmission information of the plurality of spatial division multiplexing streams includes a power coefficient of each spatial division multiplexing stream; the first information includes channel information of the first PDSCH; the interface 802 may also be configured to send second indication information to the terminal device, where the second indication information is used to indicate that the terminal device sends an uplink sounding reference signal SRS; the interface 802 may also be configured to receive an SRS from the terminal device; the processor 801 may be further configured to determine channel information of the first PDSCH from the SRS; and for each space division multiplexing stream, determining the power coefficient of the space division multiplexing stream according to the channel information of the first PDSCH and the weight of the space division multiplexing stream in the first PDSCH.

For the case that the chip is used for realizing the functions of the terminal device in the embodiment of the present application:

an interface 802 for receiving a first PDSCH from a network device, the first PDSCH carrying multiple spatial division multiplexed streams; the first PDSCH is transmitted according to transmission information of the plurality of spatial division multiplexing streams; transmission information of the plurality of space division multiplexed streams is determined based on the first information; the first information includes any one of: the signal-to-noise ratio of each spatial division multiplexed stream; reference Signal Received Power (RSRP) corresponding to each space division multiplexing stream; channel information of the first PDSCH; a processor 801, configured to demodulate the first PDSCH to obtain the multiple spatial division multiplexing streams.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the processor 801 may be further configured to determine transmission information of a plurality of spatial division multiplexing streams according to the first information; the interface 802 may also be configured to transmit transmission information for the plurality of spatial division multiplexed streams to a network device.

In one implementation, the first information includes: the signal-to-noise ratio of each space division multiplexing stream or the corresponding RSRP of each space division multiplexing stream; the interface 802 may also be used to receive measurement information from a network device; the processor 801 may be further configured to determine first information from the measurement information; the interface 802 may also be used to send the first information to the network device.

In one implementation, the measurement information includes a reference signal of an antenna port corresponding to each space division multiplexing stream; each reference signal is obtained by weighting the weight value of the space division multiplexing stream corresponding to the reference signal in the first PDSCH, or each reference signal is obtained by weighting the precoding matrix PMI fed back by the terminal device.

In one implementation, the measurement information includes a second PDSCH; the interface 802 may also be configured to receive first indication information from the network device, the first indication information being used to instruct the terminal device to determine the first information according to the second PDSCH.

In one implementation, the transmission information of the plurality of spatial division multiplexing streams includes a power coefficient of each spatial division multiplexing stream; the first information includes channel information of the first PDSCH; the interface 802 may also be configured to receive second indication information from the network device, where the second indication information is used to indicate the terminal device to send an uplink sounding reference signal SRS; the SRS is used for determining channel information of the first PDSCH; for each space division multiplexing stream, determining the power coefficient of the space division multiplexing stream by the channel information of the first PDSCH and the weight of the space division multiplexing stream in the first PDSCH; the interface 802 may also be used to transmit the SRS to the network device.

Optionally, the chip further comprises a memory 803, the memory 803 being used for storing necessary computer programs and data.

Those skilled in the art will also appreciate that the various illustrative logical blocks and steps (step) set forth in the embodiments of the present application may be implemented in electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application.

The present application also provides a computer-readable storage medium having stored thereon a computer program comprising program instructions which, when executed by a computer, implement the functions of any of the above-described method embodiments.

The computer readable storage medium includes, but is not limited to, flash memory, hard disk, solid state disk.

The present application also provides a computer program product which, when executed by a computer, implements the functionality of any of the above-described method embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer program is loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

Those of ordinary skill in the art will understand that: the various numbers of the first, second, etc. mentioned in this application are only used for the convenience of description and are not used to limit the scope of the embodiments of this application, but also to indicate the sequence.

At least one of the present applications may also be described as one or more, and a plurality may be two, three, four or more, and the present application is not limited thereto. In the embodiment of the present application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "a", "B", "C", and "D", and the like, and the technical features described in "first", "second", "third", "a", "B", "C", and "D" are not in a sequential order or a size order.

The correspondence shown in the tables in the present application may be configured or predefined. The values of the information in each table are only examples, and may be configured to other values, which is not limited in the present application. When the correspondence between the information and each parameter is configured, it is not always necessary to configure all the correspondences indicated in each table. For example, in the table in the present application, the correspondence shown in some rows may not be configured. For another example, appropriate modification adjustments, such as splitting, merging, etc., can be made based on the above tables. The names of the parameters in the tables may be other names understandable by the communication device, and the values or the expression of the parameters may be other values or expressions understandable by the communication device. When the above tables are implemented, other data structures may be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables may be used.

Predefinition in this application may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-firing.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of stream processing, the method comprising:

the network equipment acquires transmission information of a plurality of space division multiplexing streams; the plurality of space division multiplexing streams are carried on a first Physical Downlink Shared Channel (PDSCH); the transmission information of the plurality of space division multiplexing streams is determined according to the first information; the first information includes any one of: a signal-to-noise ratio of each spatial division multiplexing stream, a reference signal received power RSRP corresponding to each spatial division multiplexing stream, and channel information of the first PDSCH;

and the network equipment transmits the first PDSCH to terminal equipment according to the transmission information of the plurality of space division multiplexing streams.

2. The method of claim 1, wherein the transmission information for the plurality of spatial division multiplexed streams comprises at least one of:

a power coefficient for each of the spatial division multiplexed streams;

each of the space division multiplexed streams is mapped to a codeword.

3. The method of claim 2, wherein the first information comprises: a signal-to-noise ratio of each of the spatial division multiplexing streams or an RSRP corresponding to each of the spatial division multiplexing streams; the network device acquiring transmission information of a plurality of space division multiplexing streams includes:

the network device receives transmission information of a plurality of space division multiplexed streams from the terminal device.

4. The method of claim 2, wherein the network device obtaining transmission information for a plurality of spatial division multiplexed streams comprises:

and the network equipment determines the transmission information of the plurality of space division multiplexing streams according to the first information.

5. The method of claim 4, wherein the first information comprises: a signal-to-noise ratio of each of the spatial division multiplexing streams or an RSRP corresponding to each of the spatial division multiplexing streams; the method further comprises the following steps:

the network equipment sends measurement information to the terminal equipment, wherein the measurement information is used for the terminal equipment to determine the first information;

the network device receives the first information from the terminal device.

6. The method of claim 5, wherein the measurement information comprises a reference signal of an antenna port corresponding to the second PDSCH or each of the spatial multiplexing streams; wherein the second PDSCH carries the plurality of spatial division multiplexing streams; a transmission time of the second PDSCH is prior to a transmission time of the first PDSCH.

7. The method of claim 6, wherein the measurement information comprises a reference signal of an antenna port corresponding to each of the spatial multiplexing streams;

each reference signal is obtained by weighting a weight value of a space division multiplexing stream corresponding to the reference signal in the first PDSCH, or each reference signal is obtained by weighting a precoding matrix PMI fed back by the terminal device.

8. The method of claim 6, wherein the measurement information comprises the second PDSCH; the method further comprises the following steps:

and the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating the terminal equipment to determine the first information according to the second PDSCH.

9. The method according to any one of claims 2 to 8, wherein the transmission information of the plurality of spatial division multiplexing streams comprises a power coefficient of each of the spatial division multiplexing streams; the plurality of spatial division multiplexed streams includes at least a first spatial division multiplexed stream and a second spatial division multiplexed stream;

if the signal-to-noise ratio of the first space division multiplexing stream is smaller than the signal-to-noise ratio of the second space division multiplexing stream, the power coefficient of the first space division multiplexing stream is larger than the power coefficient of the second space division multiplexing stream; or, if the RSRP corresponding to the first space division multiplexing stream is smaller than the RSRP corresponding to the second space division multiplexing stream, the power coefficient of the first space division multiplexing stream is larger than the power coefficient of the second space division multiplexing stream.

10. The method according to any one of claims 2-8, wherein the transmission information of the plurality of spatial division multiplexing streams comprises a codeword mapped to each of the spatial division multiplexing streams; the first information comprises a signal-to-noise ratio of each of the spatial division multiplexed streams; the code word mapped by the space division multiplexing stream is a first code word or a second code word;

wherein, the absolute value of the difference between the signal-to-noise ratio of each space division multiplexing stream mapped to the first codeword and the signal-to-noise ratio of the third space division multiplexing stream is smaller than a first preset value; the absolute value of the difference between the signal-to-noise ratio of each spatial multiplexing stream mapped to the second codeword and the signal-to-noise ratio of the third spatial multiplexing stream is greater than or equal to the first preset value; the signal-to-noise ratio of the third spatial multiplexed stream is at a maximum or minimum among the plurality of spatial multiplexed streams.

11. The method according to any one of claims 2-8, wherein the transmission information of the plurality of spatial division multiplexing streams comprises a codeword mapped to each of the spatial division multiplexing streams; the first information comprises RSRP corresponding to each space division multiplexing flow; the code word mapped by the space division multiplexing stream is a third code word or a fourth code word;

wherein the RSRP corresponding to each space division multiplexing stream mapped to the third codeword has an absolute value smaller than a second preset value; the RSRP corresponding to each space division multiplexing stream mapped to the fourth codeword has an absolute value greater than or equal to the second preset value; and in the plurality of space division multiplexing streams, the RSRP corresponding to the fourth space division multiplexing stream is maximum or minimum.

12. The method of claim 4, wherein the transmission information for the plurality of spatial division multiplexed streams includes a power coefficient for each of the spatial division multiplexed streams; the first information includes channel information of the first PDSCH; the method further comprises the following steps:

the network equipment sends second indication information to the terminal equipment, wherein the second indication information is used for indicating the terminal equipment to send an uplink Sounding Reference Signal (SRS);

the network equipment receives the SRS from the terminal equipment;

the network equipment determines channel information of the first PDSCH according to the SRS;

the network device determines transmission information of the plurality of space division multiplexing streams according to the first information, and the method comprises the following steps:

for each space division multiplexing stream, the network device determines a power coefficient of the space division multiplexing stream according to the channel information of the first PDSCH and the weight of the space division multiplexing stream in the first PDSCH.

13. A method of stream processing, the method comprising:

a terminal device receives a first PDSCH from a network device, wherein the first PDSCH carries a plurality of space division multiplexing streams; the first PDSCH is transmitted according to transmission information of the plurality of spatial division multiplexing streams; the transmission information of the plurality of space division multiplexing streams is determined according to the first information;

the first information includes any one of: the signal-to-noise ratio of each space division multiplexing stream, the reference signal received power RSRP corresponding to each space division multiplexing stream, and the channel information of the first PDSCH.

14. The method of claim 13, wherein the transmission information for the plurality of spatial division multiplexed streams comprises at least one of:

a power coefficient for each of the spatial division multiplexed streams;

each of the space division multiplexed streams is mapped to a codeword.

15. The method of claim 14, wherein the first information comprises: a signal-to-noise ratio of each of the spatial division multiplexing streams or an RSRP corresponding to each of the spatial division multiplexing streams; the method further comprises the following steps:

the terminal equipment determines the transmission information of the plurality of space division multiplexing streams according to the first information;

and the terminal equipment sends the transmission information of the plurality of space division multiplexing streams to the network equipment.

16. The method of claim 14, wherein the first information comprises: a signal-to-noise ratio of each of the spatial division multiplexing streams or an RSRP corresponding to each of the spatial division multiplexing streams; the method further comprises the following steps:

the terminal equipment receives measurement information from network equipment;

the terminal equipment determines the first information according to the measurement information;

and the terminal equipment sends the first information to the network equipment.

17. The method of claim 16, wherein the measurement information comprises a reference signal of an antenna port corresponding to the second PDSCH or each of the spatial multiplexing streams; wherein the second PDSCH carries the plurality of spatial division multiplexing streams; a transmission time of the second PDSCH is prior to a transmission time of the first PDSCH.

18. The method of claim 17, wherein the measurement information comprises a reference signal of an antenna port corresponding to each of the spatial multiplexing streams;

19. The method of claim 17, wherein the measurement information comprises the second PDSCH; the method further comprises the following steps:

the terminal device receives first indication information from the network device, wherein the first indication information is used for indicating the terminal device to determine the first information according to the second PDSCH.

20. The method according to any one of claims 14 to 19, wherein the transmission information of the plurality of spatial division multiplexing streams comprises a power coefficient of each of the spatial division multiplexing streams; the plurality of spatial division multiplexed streams includes at least a first spatial division multiplexed stream and a second spatial division multiplexed stream;

21. The method according to any one of claims 14 to 19, wherein the transmission information of the plurality of spatial division multiplexing streams comprises a codeword mapped to each of the spatial division multiplexing streams; the first information comprises a signal-to-noise ratio of each of the spatial division multiplexed streams; the code word mapped by the space division multiplexing stream is a first code word or a second code word;

22. The method according to any one of claims 14 to 19, wherein the transmission information of the plurality of spatial division multiplexing streams comprises a codeword mapped to each of the spatial division multiplexing streams; the first information comprises RSRP corresponding to each space division multiplexing flow; the code word mapped by the space division multiplexing stream is a third code word or a fourth code word;

23. The method of claim 14, wherein the transmission information for the plurality of spatial division multiplexed streams includes a power coefficient for each of the spatial division multiplexed streams; the first information includes channel information of the first PDSCH; the method further comprises the following steps:

the terminal device receives second indication information from the network device, wherein the second indication information is used for indicating the terminal device to send an uplink Sounding Reference Signal (SRS); the SRS is used for determining channel information of the first PDSCH; for each of the spatial division multiplexed streams, a power coefficient of the spatial division multiplexed stream is determined by channel information of the first PDSCH and a weight of the spatial division multiplexed stream in the first PDSCH;

and the terminal equipment sends the SRS to the network equipment.

24. A communication device comprising means for performing the method of any of claims 1-12.

25. A communication device comprising means for performing the method of any of claims 13-23.

26. A communications apparatus, comprising a processor and a memory, the memory having stored therein program instructions, the processor executing the program instructions stored in the memory to cause the apparatus to perform the method of any of claims 1 to 12.

27. A communications apparatus, comprising a processor and a memory, the memory having stored therein program instructions, the processor executing the program instructions stored in the memory to cause the apparatus to perform the method of any of claims 13 to 23.

28. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions which, when executed by a communication device, cause the communication device to perform the method of any of claims 1-12 or 13-23.