WO2021207895A1

WO2021207895A1 - Uplink signal transmission method and communication apparatus

Info

Publication number: WO2021207895A1
Application number: PCT/CN2020/084542
Authority: WO
Inventors: 吴晔; 毕晓艳
Original assignee: 华为技术有限公司
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2021-10-21
Also published as: CN115336192A

Abstract

Provided are an uplink signal transmission method and a communication apparatus, which are used to reduce the complexity of precoding operations. The method comprises: a terminal device generating first channel information and sending same to a network device, wherein the first channel information is used for indicating the phase of a first downlink channel, the phase of the first downlink channel is obtained on the basis of the measurement of the first downlink channel, and can be used for determining a first precode, and the first precode is used for precoding a modulation symbol of a first uplink signal. The first precode determined thereby is a scalar, and can be used for precoding a constellation diagram obtained after modulation. Compared with a traditional precoding operation of performing weighting processing on signals of transmitting antenna ports, the processing complexity is lower and the operation is simpler. On the same time-frequency resource, or when there are two uplink signals transmitted in the same measurement range, mutual interference can also be eliminated by means of executing the precoding operations on the two uplink signals respectively.

Description

Method and communication device for transmitting uplink signal

Technical field

This application relates to the field of wireless communication, and more specifically, to a method and communication device for transmitting uplink signals.

Background technique

Multi-user multi-input multi-output (MU-MIMO) can support the use of the same time-frequency resource to transmit different data between a network device and multiple terminal devices. However, when multiple terminal devices use the same time-frequency resource to transmit uplink signals to the same network device, the data transmitted by each terminal device may interfere with each other, thereby affecting the network device's reception of the uplink signal.

Generally, terminal equipment can reduce interference among multiple users through precoding. To perform the precoding operation, it is usually necessary to determine the precoding matrix based on the measured channel matrix, and then perform weighting processing on the signals of each transmit antenna port through the precoding matrix. Therefore, the processing complexity is relatively high for the terminal device.

Summary of the invention

The present application provides a method and communication device for transmitting uplink signals, in order to reduce the complexity of the precoding operation of terminal equipment.

In the first aspect, a method for transmitting uplink signals is provided. The method may be executed by a terminal device, or may also be executed by a component (such as a circuit, a chip, or a chip system, etc.) configured in the terminal device. This application does not limit this.

The method includes: generating first channel information, where the first channel information is used to indicate the phase of a first downlink channel; the phase of the first downlink channel is obtained based on the measurement of the first downlink channel; The phase of the first downlink channel is used to determine the first precoding, and the first precoding is used to precode modulation symbols of the first uplink signal, and the modulation symbols include binary phase shift keying (binary phase shift keying). shift keying, BPSK) symbols obtained by modulation, or symbols obtained by π/2-BPSK modulation; sending the first channel information.

Based on the above technical solution, the network device can determine the first precoding adapted to the first uplink channel based on the phase of the first downlink channel, and the determined first precoding is a scalar, and the first precoding can be used for The constellation diagram of the modulation symbols of the first uplink signal undergoes phase rotation, so as to realize the precoding operation. Therefore, compared to the precoding operation in which the signals of multiple transmit antenna ports are weighted through the precoding matrix, the precoding operation is greatly simplified, and the processing complexity of the terminal device is reduced. At the same time, taking advantage of the reciprocity of the uplink and downlink channels, the network device can use the information of the first downlink channel fed back by the terminal device to determine the precoding adapted to the first uplink channel, and the network device can also determine the precoding process. Simplified, the amount of calculation is greatly reduced.

Binding a first aspect, some possible implementations of the first aspect, the phase of the first channel information indicating the first downlink channel in a predefined codewords M ₁ corresponding to the codeword, Wherein, the _{phases of the M 1} codewords are equally divided in the range of 0 to 2π, and M ₁ is an integer greater than 1.

That is, through a predefined codebook, 0 to 2π are evenly divided into M ₁ angles, and the M ₁ angles correspond to M ₁ codewords in the codebook. The indication of the phase of the downlink channel by the terminal device may specifically be an indication of the corresponding codeword in the codebook. Therefore, the instruction overhead is small.

With reference to the first aspect, in some possible implementation manners of the first aspect, the method further includes: receiving first indication information, where the first indication information is used to indicate the first precoding; A precoding precodes the modulation symbols of the first uplink signal to obtain a precoded first uplink signal; and sends the precoded first uplink signal through the first uplink channel.

The terminal device precodes the modulation symbol of the first uplink signal based on the first precoding indicated by the network device, that is, performs phase rotation on the constellation diagram obtained by modulating the first uplink signal to obtain the precoded The first uplink signal. Therefore, the precoding complexity can be reduced, and interference can be reduced, and the receiving performance of the first uplink signal can be improved.

With reference to the first aspect, in some possible implementation manners of the first aspect, the first precoding is determined based on predefined M ₂ codewords; wherein _{the phase of the M 2} codewords is between 0 and 2π Evenly distributed in the range, M ₂ is an integer greater than 1; the second indication information is used to indicate the code word corresponding to the first precoding among _{the M 2 code words.}

That is, through a predefined codebook, 0 to 2π are evenly divided into M ₂ angles, and the M ₂ angles correspond to M ₂ codewords in the codebook. The indication of the first precoding by the terminal device may specifically be an indication of the corresponding codeword in the codebook. Therefore, the instruction overhead of the first precoding by the network device is relatively small.

Optionally, M ₁ and M _{2 are the} same. In this case, the indication of the first precoding and the indication of the first channel information may share the same codebook.

Optionally, M ₁ and M _{2 are} different. In this case, codebooks with different accuracy can be configured according to the requirements for feedback accuracy; or codebooks with different accuracy can be configured according to the requirements for precoding indication accuracy. M ₁ and M ₂ can be decoupled from each other, and the configuration of their values is more flexible.

With reference to the first aspect, in some possible implementation manners of the first aspect, the method further includes: receiving second indication information, where the second indication information is used to indicate a modulation mode for the first uplink signal, The modulation method includes BPSK or π/2-BPSK.

With reference to the first aspect, in some possible implementation manners of the first aspect, the modulation method for the first uplink signal is predefined. For example, the protocol is predefined. The modulation method includes BPSK or π/2-BPSK

That is, the modulation mode for the first uplink signal may be indicated by the network device through signaling, or may be predefined. This application does not limit this.

With reference to the first aspect, in some possible implementations of the first aspect, the method further includes: receiving third indication information, where the third indication information is used to instruct to perform π/2 on the first uplink signal. -The phase of the modulation symbol obtained after BPSK.

With reference to the first aspect, in some possible implementation manners of the first aspect, the phase of the modulation symbol obtained after performing π/2-BPSK on the first uplink signal is a predefined value. For example, pre-defined by the protocol.

When the modulation mode is π/2-BPSK, the phase of the modulation symbol obtained after performing π/2-BPSK on the first uplink signal can be further restricted. The phase can be indicated by the network equipment through signaling, or it can be predefined. This application does not limit this.

With reference to the first aspect, in some possible implementations of the first aspect, the same uplink resource scheduled by the network device is also used to transmit the second uplink signal, and the phase of the first precoding is also the same as the phase of the second downlink channel. And/or the phase correlation of the second precoding, wherein the second precoding is used for precoding the modulation symbols of the second uplink signal, and the second downlink channel is used for transmitting the second uplink signal. The signal corresponds to the second uplink channel.

The network device may determine the phase of the first precoding in combination with the phase of the second downlink channel and/or the phase of the second precoding, and then determine the first precoding.

Since the same time-frequency resource scheduled by the network device can be used to transmit the first uplink signal and the second uplink signal, there may be mutual interference between the two. The network device can limit the first precoding and the second precoding, so that the mutual interference between the first uplink signal and the second uplink signal can be eliminated.

In the embodiment of the present application, since the network device can determine the first precoding and the second precoding according to the phase of the first downlink channel and the phase of the second downlink channel, the frequency of the first uplink channel and the second uplink channel The domain resources may respectively fall within the range used to determine the measurement bandwidth of the first downlink channel and the measurement bandwidth of the second downlink channel, so that the determined first precoding and second precoding are respectively the same as those of the first uplink channel and the second downlink channel. The second uplink channel is adapted.

It can be understood that the measurement bandwidth of the first downlink channel and the measurement bandwidth of the second downlink channel partially or completely overlap. Since the first uplink channel falls within the measurement bandwidth of the first downlink channel, and the second uplink channel falls within the measurement bandwidth of the second downlink channel, the measurement bandwidth of the first downlink channel and the measurement bandwidth of the second downlink channel are at least There is a partial overlap.

With reference to the first aspect, in some possible implementations of the first aspect, the same uplink resource scheduled by the network device is used for the transmission of the first uplink signal and the second uplink signal, and the second uplink signal performs π The phase of the modulation symbol obtained after the /2-BPSK modulation is the same as the phase of the modulation symbol obtained after the first uplink signal is modulated by π/2-BPSK on the same resource element (RE).

That is, it is restricted that the rotation angle and direction of the modulation symbols obtained after π/2-BPSK modulation of the first uplink signal and the second uplink signal on the same time-frequency resource are consistent.

In the second aspect, a method for transmitting uplink signals is provided. The method may be executed by a terminal device, or may also be executed by a component (such as a circuit, a chip, or a chip system, etc.) configured in the terminal device. This application does not limit this.

The method includes: precoding modulation symbols of the uplink signal based on precoding, the modulation symbols including symbols obtained by BPSK modulation, or symbols obtained by π/2-BPSK modulation, and the precoding phase is 0 Or ±π/2; Send the pre-coded uplink signal.

Based on the above technical solution, the terminal device can determine precoding based on a predefined phase, and then precode the modulation symbols of the uplink signal. The precoding thus determined can be used to perform phase rotation on the constellation diagram of the modulation symbol of the uplink signal, so as to realize the precoding operation. Therefore, compared to the precoding operation in which the signals of multiple transmit antenna ports are weighted through the precoding matrix, the precoding operation is greatly simplified, and the processing complexity of the terminal device is reduced.

Wherein, if the phase of the precoding is 0, it is equivalent to not performing the precoding operation on the modulation symbol of the uplink signal. If the precoding phase is ±π/2, it is equivalent to a clockwise or counterclockwise rotation of the constellation diagram of the modulation symbol of the uplink signal by π/2.

With reference to the second aspect, in some possible implementation manners of the second aspect, the method further includes: receiving the precoding indication information.

Optionally, the network device may indicate the precoding by indicating the phase of the precoding. For specific instructions, please refer to the relevant description in the first aspect of the previous article. For the sake of brevity, it will not be repeated here.

With reference to the second aspect, in some possible implementation manners of the second aspect, the precoding phase is a predefined value. For example, pre-defined by the protocol.

In a possible design, the uplink signal is the second uplink signal described in the first aspect or the third aspect, the precoding is the second precoding described in the first aspect or the third aspect, and the precoding is The encoded indication information may be, for example, the fourth indication information described in the third aspect.

In other words, the first uplink signal and the second uplink signal are transmitted on the same time-frequency resource. Limiting the phase of the second precoding to 0 or ±π/2 can facilitate the network device to determine the first precoding.

With reference to the first aspect or the second aspect, in some possible implementations of the first or second aspect, the method further includes: receiving indication information of a reporting granularity, where the reporting granularity is reporting the first channel The frequency domain granularity on which the information is based.

With reference to the first aspect or the second aspect, in some possible implementation manners of the first aspect or the second aspect, the reporting granularity is a predefined value. For example, it is predefined by the protocol.

That is, the reporting granularity of the first channel information by the terminal device may be indicated by the network device through signaling, or may be predefined. This application does not limit this.

With reference to the first aspect or the second aspect, in some possible implementation manners of the first or second aspect, the method further includes: receiving indication information of precoding granularity, where the precoding granularity is relative to the first The frequency domain granularity on which modulation symbols of an uplink signal are pre-coded.

With reference to the first aspect or the second aspect, in some possible implementation manners of the first aspect or the second aspect, the precoding granularity is a predefined value. For example, it is predefined by the protocol.

That is, the granularity based on which the terminal device precodes the uplink signal may be indicated by the network device through signaling, or may be predefined. This application does not limit this.

Optionally, the precoding granularity is the same as the reporting granularity.

Optionally, the precoding granularity is different from the reporting granularity.

In the third aspect, a method for transmitting uplink signals is provided. The method may be executed by a network device, or may also be executed by a component (such as a circuit, a chip, or a chip system, etc.) configured in the network device. This application does not limit this.

The method includes: receiving first channel information, where the first channel information is used to indicate a phase of a first downlink channel, and the phase of the first downlink channel is obtained based on a measurement on the first downlink channel; The phase of the first downlink channel determines a first precoding, and the first precoding is used to precode modulation symbols of the first uplink signal, and the modulation symbols include those obtained by binary phase shift keying BPSK modulation. Symbol, or a symbol obtained by π/2-BPSK modulation; sending first indication information, where the first indication information is used to indicate the first precoding.

With reference to the third aspect, in some possible implementation manners of the third aspect, the first indication information indicates the codeword corresponding to the _{phase of the first precoding in the predefined M 2 codewords; wherein} , The phases of the M ₂ codewords are uniformly distributed in the range of 0 to 2π, and M ₂ is an integer greater than 1.

With reference to the third aspect, in some possible implementations of the third aspect, the phase of the first channel is determined based on predefined M ₁ codewords; wherein _{the phase of the M 1} codewords is between 0 and Evenly distributed in the range of 2π, M ₁ is an integer greater than 1, and the first channel information indicates a code word corresponding to the phase of the first downlink channel among _{the M 1 code words.}

With reference to the third aspect, in some possible implementation manners of the third aspect, the method further includes: sending second indication information, where the second indication information is used to indicate a modulation mode for the first uplink signal, The modulation method includes BPSK or π/2-BPSK.

With reference to the third aspect, in some possible implementation manners of the third aspect, the modulation method for the first uplink signal is predefined. For example, the protocol is predefined. The modulation method includes BPSK or π/2-BPSK

With reference to the third aspect, in some possible implementation manners of the third aspect, the method further includes: sending third indication information, where the third indication information is used to instruct to perform π/2- on the first uplink signal. The phase of the modulation symbol obtained after BPSK modulation.

With reference to the third aspect, in some possible implementation manners of the third aspect, the phase of the modulation symbol obtained by performing π/2-BPSK modulation on the first uplink signal is a predefined value. For example, the protocol is predefined.

With reference to the third aspect, in some possible implementation manners of the third aspect, the method further includes: sending fourth indication information, where the fourth indication information is used to indicate the second precoding, and the second precoding Used for precoding the modulation symbols of the second uplink signal; the difference between the phase difference between the second precoding and the first precoding and the phase difference between the second downlink channel and the first downlink channel The value is ±π/2, the second downlink channel corresponds to the second uplink channel used to transmit the second uplink signal, and the second uplink channel and the first uplink channel occupy the same time-frequency resources .

That is, the same uplink resource scheduled by the network device is used to transmit the first uplink signal and the second uplink signal. In this case, there may be mutual interference between the two. The network device may determine the first precoding according to the phase of the first downlink channel and the phase of the second downlink channel or the phase of the second precoding. When the difference between the phase difference between the second precoding and the first precoding and the phase difference between the second downlink channel and the first downlink channel is ±π/2, the difference between the first uplink signal and the second uplink signal The mutual interference is eliminated.

With reference to the third aspect, in some possible implementation manners of the third aspect, the method further includes: receiving second channel information, where the second channel information is used to indicate the phase of the second downlink channel.

With reference to the third aspect, in some possible implementation manners of the third aspect, the phase of the second precoding is 0 or ±π/2.

The network device may determine the second precoding according to the phase of the second downlink channel, or determine the phase of the second precoding as a predefined value, such as 0 or ±π/2.

With reference to the third aspect, in some possible implementation manners of the third aspect, the phase of the second precoding may also be a predefined value, such as a protocol predefined. In this case, the network device may not determine and indicate the second precoding.

With reference to the third aspect, in some possible implementation manners of the third aspect, the method further includes: sending fourth indication information, where the fourth indication information is used to indicate a modulation mode for the second uplink signal, and Modulation methods include BPSK or π/2-BPSK.

With reference to the third aspect, in some possible implementation manners of the third aspect, the modulation method for the second uplink signal is predefined, such as a protocol predefined. The modulation method includes BPSK or π/2-BPSK.

That is, the modulation mode for the second uplink signal may be indicated by the network device through signaling, or may be predefined. This application does not limit this.

With reference to the third aspect, in some possible implementation manners of the third aspect, the method further includes: sending fifth indication information, where the fifth indication information is used to instruct to perform π/2 on the second uplink signal. -The phase of the modulation symbol obtained after BPSK modulation.

When the modulation mode is π/2-BPSK, the phase of the modulation symbol obtained after performing π/2-BPSK on the second uplink signal can be further restricted. The phase can be indicated by the network equipment through signaling, or it can be predefined. This application does not limit this.

Further, in some possible implementation manners of the third aspect, the phase of the modulation symbol obtained after the second uplink signal is π/2-BPSK modulated is π/2-BPSK modulated with the first uplink signal The modulation symbols obtained afterwards have the same phase.

With reference to the third aspect, in some possible implementation manners of the third aspect, the method further includes:

Sending the indication information of the reporting granularity, where the reporting granularity is the frequency domain granularity on which the first channel information is reported.

With reference to the third aspect, in some possible implementation manners of the third aspect, the reporting granularity is a predefined value. For example, it is predefined by the protocol.

Send the indication information of the precoding granularity, where the precoding granularity is the frequency domain granularity based on precoding the modulation symbols.

Optionally, the precoding granularity is the same as the reporting granularity.

It should be understood that the restrictions on the first uplink signal and the second uplink signal, the first precoding and the second precoding in the foregoing first aspect to the third aspect can be reversed, which is not limited in this application.

In a fourth aspect, a communication device is provided. The communication device may be a terminal device or a component in the terminal device. The communication device may include various modules or units for executing the methods in the first and second aspects and any one of the possible implementation manners of the first and second aspects.

In a fifth aspect, a communication device is provided, including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement the method in any one of the foregoing first and second aspects and the first and second aspects. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, the processor is coupled with the communication interface, and the communication interface is used to input and/or output information, and the information includes at least one of instructions and data.

In an implementation manner, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In another implementation manner, the communication device is a chip or a chip system configured in a terminal device. When the communication device is a chip or a chip system configured in a terminal device, the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, etc. The processor may also be embodied as a processing circuit or a logic circuit.

In a sixth aspect, a communication device is provided. The communication device may be a network device or a component in the network device. The communication device may include various modules or units for executing the third aspect and the method in any one of the possible implementation manners of the third aspect.

In a seventh aspect, a communication device is provided, including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement the third aspect and the method in any one of the possible implementation manners of the third aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, the processor is coupled with the communication interface, and the communication interface is used to input and/or output information, and the information includes at least one of instructions and data.

In an implementation manner, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip or a chip system configured in a network device. When the communication device is a chip or a chip system configured in a network device, the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin, or a related circuit. The processor may also be embodied as a processing circuit or a logic circuit.

In an eighth aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit, and transmit a signal through the output circuit, so that the processor executes any one of the above-mentioned first to third aspects and any one of the possible implementation manners of the first to third aspects In the method.

In the specific implementation process, the above-mentioned processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and output The circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

In a ninth aspect, a processing device is provided, including a communication interface and a processor. The communication interface is coupled with the processor. The communication interface is used to input and/or output information. The information includes at least one of instructions and data. The processor is configured to execute a computer program, so that the processing device executes the method in any one of the first to third aspects and the first to third aspects.

Optionally, there are one or more processors, and one or more memories.

In a tenth aspect, a processing device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, receive signals through a receiver, and transmit signals through a transmitter, so that the device can execute any one of the first to third aspects and the first to third aspects. The method in the implementation mode.

Optionally, there are one or more processors, and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory and the processor may be provided separately.

In the specific implementation process, the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of the memory and the setting mode of the memory and the processor.

It should be understood that the related information interaction process, for example, sending instruction information may be a process of outputting instruction information from the processor, and receiving instruction information may be a process of inputting received instruction information to the processor. Specifically, the information output by the processing may be output to the transmitter, and the input information received by the processor may come from the receiver. Among them, the transmitter and receiver can be collectively referred to as a transceiver.

The devices in the ninth and tenth aspects described above may be chips, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; When implemented by software, the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory. The memory may be integrated in the processor, may be located outside the processor, and exist independently.

In an eleventh aspect, a computer program product is provided. The computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes the computer to execute the first to the first The method in any one of the three aspects and the first to third aspects.

In a twelfth aspect, a computer-readable medium is provided, and the computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the first to the first The method in any one of the three aspects and the first to third aspects.

In a thirteenth aspect, a communication system is provided, including the aforementioned terminal device and network device.

Description of the drawings

FIG. 1 is a schematic diagram of a communication system applicable to the method provided by the embodiment of the present application;

FIG. 2 is a schematic flowchart of a method for transmitting uplink signals according to an embodiment of the present application;

Figure 3 shows two blocks of uplink transmission resources in the same measurement bandwidth;

4 and 5 are schematic block diagrams of communication devices provided by embodiments of the present application;

FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

Fig. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The technical solution provided in this application can be applied to a Long Term Evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a general mobile communication system (universal mobile telecommunication system, UMTS) , worldwide Interoperability for microwave access (worldwide interoperability for microwave access, WiMAX ) communication system, the fifth generation (5 ^th Generation, 5G) mobile communication system or a new radio access technology (new radio access technology , NR) or next-generation communications, such as 6G. Among them, the 5G mobile communication system can be non-standalone (NSA) or standalone (SA).

The technical solution provided in this application can also be applied to machine type communication (MTC), inter-machine communication long-term evolution technology (Long Term Evolution-machine, LTE-M), and device to device (device to device, D2D) networks , Machine to Machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network may include, for example, the Internet of Vehicles. Among them, the communication methods in the Internet of Vehicles system are collectively referred to as vehicle-to-other devices (vehicle-to-X, V2X, X can represent anything), for example, the V2X may include: vehicle-to-vehicle (V2V) communication. Infrastructure (vehicle to infrastructure, V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc.

The technical solution provided herein can also be applied to future communication systems, such as the sixth generation (6 ^th Generation, 6G), mobile communication systems. This application does not limit this.

In the embodiment of the present application, the network device may be any device that has a wireless transceiver function. This equipment includes but is not limited to: evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC) , Base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), wireless fidelity (wireless fidelity, WiFi) system Access point (AP), wireless relay node, wireless backhaul node, transmission point (TP), or transmission and reception point (TRP), etc., can also be 5G, such as NR , The gNB in the system, or the transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of the base station in the 5G system, or it can also be a network node that constitutes a gNB or transmission point, Such as a baseband unit (BBU), or a distributed unit (DU), or a base station in the next-generation communication 6G system.

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (AAU). The CU implements some of the functions of the gNB, and the DU implements some of the functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implements radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layer functions. The DU is responsible for processing physical layer protocols and real-time services, and implements the functions of the radio link control (RLC) layer, medium access control (MAC) layer, and physical (physical, PHY) layer. AAU realizes some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , Or, sent by DU and AAU. It can be understood that the network device may be a device that includes one or more of a CU node, a DU node, and an AAU node. In addition, the CU can be divided into network equipment in an access network (radio access network, RAN), and the CU can also be divided into network equipment in a core network (core network, CN), which is not limited in this application.

The network equipment provides services for the cell, and the terminal equipment communicates with the cell through the transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network equipment, and the cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.) , It may also belong to the base station corresponding to the small cell, where the small cell may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage area and low transmit power, and are suitable for providing high-speed data transmission services.

In the embodiments of the present application, terminal equipment may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, Terminal, wireless communication equipment, user agent or user device.

The terminal device may be a device that provides voice/data connectivity to the user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and so on. At present, some examples of terminals can be: mobile phones (mobile phones), tablets (pads), computers with wireless transceiver functions (such as laptops, palmtop computers, etc.), mobile Internet devices (mobile internet devices, MID), virtual reality Virtual reality (VR) equipment, augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving (self-driving), and wireless in remote medical (remote medical) Terminals, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless Telephone, session initiation protocol (SIP) telephone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or connection Other processing equipment to wireless modems, in-vehicle equipment, wearable equipment, terminal equipment in the 5G network, or terminal equipment in the public land mobile network (PLMN) that will evolve in the future.

Among them, wearable devices can also be called wearable smart devices, which are the general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets and smart jewelry for physical sign monitoring.

In addition, the terminal device may also be a terminal device in the Internet of Things (IoT) system. IoT is an important part of the development of information technology in the future. Its main technical feature is to connect objects to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and interconnection of things. IoT technology can achieve massive connections, deep coverage, and power-saving terminals through, for example, narrowband (NB) technology.

In addition, terminal devices can also include sensors such as smart printers, train detectors, gas stations, etc. The main functions include collecting data (some terminal devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices. .

To facilitate the understanding of the embodiments of the present application, first, the communication system shown in FIG. 1 is taken as an example to describe in detail the communication system applicable to the embodiments of the present application. FIG. 1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application. As shown in the figure, the wireless communication system 100 may include at least one network device, such as the network device 111 shown in FIG. 1, and the wireless communication system 100 may also include at least one terminal device, such as the terminal devices 121 to 121 shown in FIG. Terminal equipment 124.

Each communication device, such as the network device 111 and each terminal device 121 to 124 in FIG. 1, can be configured with multiple antennas. The multiple antennas configured for each communication device may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. In addition, each communication device additionally includes a transmitter chain and a receiver chain. Those of ordinary skill in the art can understand that they can all include multiple components related to signal transmission and reception (such as processors, modulators, multiplexers, etc.). , Demodulator, demultiplexer or antenna, etc.). Therefore, multiple antenna technology can be used to communicate between network devices and terminal devices.

Although not shown in the figure, it can be understood that the communication system 100 may also include other numbers of terminal devices. For example, the communication system 100 may also include more terminal devices. More terminal devices can directly communicate with the network device 111; they can also communicate with the network device 111 indirectly, such as communicating with the network device via one of the terminal device 121 to the terminal device 124 shown in the figure. This application does not limit this.

In addition, terminal devices can communicate directly. For example, D2D technology can be used to realize direct communication between terminal devices. For example, between the

terminal devices

121 and 122, and between the

terminal devices

123 and 124, D2D technology can be used to directly communicate. This application does not limit this.

The terminal device can usually send uplink signals to the network device through the physical uplink control channel (PUCCH) and the physical uplink share channel (PUSCH), for example, the uplink control information (UCI) is transmitted through the PUCCH. ) Or transmit uplink data through PUSCH, etc.

Due to limited uplink resources, in order to increase channel capacity, multiple terminal devices can use the same time-frequency resource to send uplink signals to the network device. However, this may cause mutual interference between the uplink signals of multiple terminal devices. For example, the terminal device 121 and the terminal device 122 in the figure may cause mutual interference between the uplink signals sent on the same time-frequency resource. The terminal device 123 and the terminal device 124 may interfere with each other. Mutual interference between uplink signals sent on the same time-frequency resource.

Assuming that the terminal device 121 and the terminal device 122 are transmitting on the same time-frequency resource, the following formula shows an example of the signal from the terminal device 121 and the terminal device 122 received by the network device:

Where r represents the received signal, h ₁ represents the first uplink channel, γ ₁ represents the amplitude of the first uplink channel, α ₁ represents the phase of the first uplink channel; s ₁ represents the signal transmitted through the first uplink channel; h ₂ shows a second uplink channel, γ ₂ represents the second uplink channel amplitude, α ₂ denotes the phase of the second upstream channels; S ₂ is represented by a signal a second transmission over the uplink channel; E _S represents the constellation diagram after modulated The energy of the symbol; n represents noise.

It can be seen that the first uplink signal and the second uplink signal interfere with each other, resulting in poor reception quality of the second uplink signal of the first uplink signal by the network device, thereby affecting the transmission performance of the system.

For example, when the receiving quality of the PUCCH by the network device is not good, the UCI transmitted in the PUCCH may not be decoded correctly by the network device. This may cause subsequent network equipment to adversely affect the scheduling of downlink transmission.

Generally, terminal equipment can reduce interference among multiple users through precoding. Since the precoding operation usually needs to perform weighting processing on the signals of each transmit antenna port according to the precoding matrix, the processing complexity is relatively high for the terminal device.

In view of this, the present application provides a method for transmitting uplink data, in order to reduce the complexity of the precoding operation.

In order to better understand the embodiments of the present application, before introducing the embodiments of the present application, the following explanations are made:

First, in this application, "instructions" can include direct instructions and indirect instructions. When describing a certain indication information for indicating A, the indication information may directly indicate A or indirectly indicate A, but it does not mean that A must be carried in the indication information.

The information indicated by the instruction information is called the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated or the information to be indicated. Indicates the index of the information, etc. The information to be indicated can also be indicated indirectly by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, it is also possible to realize the indication of specific information by means of a pre-arranged order (for example, stipulated in an agreement) of various information, so as to reduce the indication overhead to a certain extent. At the same time, it can also identify the common parts of each information and give unified instructions, so as to reduce the instruction overhead caused by separately indicating the same information.

In addition, the specific instruction manner may also be various existing instruction manners, such as but not limited to the foregoing instruction manners and various combinations thereof. For the specific details of the various indication modes, reference may be made to the prior art, which will not be repeated here. It can be seen from the above that, for example, when multiple pieces of information of the same type need to be indicated, a situation where different information is indicated in different ways may occur. In the specific implementation process, the required instruction method can be selected according to specific needs. The embodiment of the application does not limit the selected instruction method. As a result, the instruction method involved in the embodiment of the application should be understood as covering that can make the instruction to be instructed Various methods for obtaining information to be indicated.

The information to be instructed can be sent together as a whole, or divided into multiple sub-information to be sent separately, and the sending period and/or sending timing of these sub-information can be the same or different. The specific sending method is not limited in this application. The sending period and/or sending timing of these sub-information may be pre-defined, for example, pre-defined according to a protocol, or configured by the transmitting end device by sending configuration information to the receiving end device. The configuration information may include, for example, but not limited to, one or a combination of at least two of radio resource control signaling, medium access control (medium access control, MAC) layer signaling, and physical layer signaling. Among them, radio resource control signaling, such as packet radio resource control (RRC) signaling; MAC layer signaling, for example, includes MAC control element (CE); physical layer signaling, for example, includes downlink control information (downlink control). information, DCI).

Second, in the embodiments shown below, the first, second, and various numerical numbers are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application. For example, distinguish different instructions.

Third, "pre-defined" can be realized by pre-saving corresponding codes, tables, or other methods that can be used to indicate related information in devices (for example, including terminal devices and network devices). Make a limit. Wherein, "saving" may refer to storing in one or more memories. The one or more memories may be provided separately, or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories may also be partly provided separately, and partly integrated in a decoder, a processor, or a communication device. The type of the memory can be any form of storage medium, which is not limited in this application.

Fourth, the “protocols” involved in the embodiments of the present application may refer to standard protocols in the communication field, for example, may include LTE protocol, NR protocol, and related protocols applied to future communication systems, which are not limited in this application.

Fifth, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one of a, b, and c can mean: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a , B, and c. Among them, a, b, and c can be single or multiple.

Sixth, in the embodiments of this application, the descriptions of "when...", "under the condition of...", "if" and "if" all refer to equipment (such as terminal equipment or The network device will make the corresponding processing, which is not a time limit, and the device (such as a terminal device or a network device) is not required to have a judging action when it is implemented, nor does it mean that there are other restrictions.

The method provided in this application will be described in detail below in conjunction with the accompanying drawings.

It should be understood that the following is only for ease of understanding and description, and the interaction between the first terminal device, the second terminal device, and the network device is taken as an example to describe in detail the method provided in the embodiment of the present application. Among them, the network device may correspond to the network device 111 in the communication system shown in FIG. 1, for example; the first terminal device and the second terminal device may correspond to the terminal devices 121 to 124 in the communication system shown in FIG. Two terminal devices that transmit uplink signals at the same time and interfere with each other, such as 121 and terminal device 122, or terminal device 123 and terminal device 124, or terminal device 121 and terminal device 124, are not listed here for brevity.

In addition, although the following embodiments describe the interaction between the first terminal device, the second terminal device, and the network device, this should not constitute any limitation on the execution subject of each step. For example, the terminal devices (such as the first terminal device and the second terminal device) shown in the following embodiments can be replaced with components configured in the terminal device (such as circuits, chips, chip systems, or other functional modules that can call and execute programs). ). The network devices shown in the following embodiments can also be replaced with components (such as circuits, chips, chip systems, or other functional modules that can call and execute programs) configured in the network device.

FIG. 2 is a schematic flowchart of a communication method 200 provided by an embodiment of the present application. As shown in FIG. 2, the method 200 may include step 201 to step 216. The steps in the method 200 are described in detail below.

In step 201, the network device obtains the phase of the first uplink channel or the phase of the first downlink channel.

In the embodiment of the present application, the first uplink channel may be, for example, an uplink channel between the network device and the first terminal device. The first downlink channel may be, for example, a downlink channel between the network device and the first terminal device. Since the first downlink channel and the first uplink channel are both channels between the first terminal device and the network device, the two can pass through, for example, frequency division duplexing (FDD) and time division duplexing (time division duplexing). TDD) and other communication modes to realize the transmission of uplink and downlink signals. Therefore, it can be considered that the first uplink channel corresponds to the first downlink channel.

As an example and not a limitation, the first uplink channel may be a physical uplink share channel (PUSCH) or a physical uplink control channel (PUCCH).

In an implementation manner, the network device may determine the phase of the first uplink channel by measuring the first uplink channel, as shown in step 201a in FIG. 2. In another implementation manner, the network device may also obtain the phase of the first downlink channel from the first terminal device, as shown in 201b in FIG. 2. The following is a detailed description in combination with these two different implementations.

In the former implementation manner, the network device may measure the first uplink channel based on the received uplink reference signal from the first terminal device, such as SRS, etc., to obtain the phase of the first uplink channel, as shown in step 201a Shown. The specific method for the network device to measure the first uplink channel based on the uplink reference signal can refer to the prior art. For brevity, it will not be described in detail here.

The phase of the first uplink channel is used to determine the first precoding, and the first precoding may be used to precode the modulation symbols of the first uplink signal transmitted through the first uplink channel. Since the network device performs channel measurement on the first uplink channel based on the uplink reference signal, and then obtains the phase of the first uplink channel, the first precoding determined based on the phase of the first uplink channel is the same as that of the first uplink channel. Adapted. This implementation can be applied to communication modes such as FDD and TDD.

The network device may also measure the first uplink channel based on the measurement granularity. The measurement granularity may refer to the frequency domain granularity on which the network device measures the first uplink channel. As an example and not a limitation, the measurement granularity may be a subband, for example. Of course, the measurement granularity can also be other possible frequency domain granularity. This application does not limit this.

In the latter implementation manner, the network device may obtain the measurement result of the first downlink channel by the first terminal device by sending a downlink reference signal, such as a CSI-RS. For example, the network device can configure downlink reference signals with different time domain behaviors, such as configuring periodic (periodic), aperiodic (aperiodic), semi-persistant (semi-persistant, SP), etc., to obtain downlink reference signals for different time domain behaviors. The measurement result of the downlink reference signal. The specific method for the terminal device to measure the first downlink channel based on the downlink reference signal can also refer to the prior art. For brevity, it will not be described in detail here.

In some cases, the network device may not receive the uplink reference signal from the first terminal device in a recent period of time, and therefore cannot obtain the latest channel information about the first uplink channel. In this case, the network device may determine the phase of the first downlink channel based on the measurement result of the first downlink channel from the first terminal device.

Since the first downlink channel and the first uplink channel may realize the transmission of uplink and downlink signals through communication modes such as FDD or TDD, there may be a certain reciprocity between the first downlink channel and the first uplink channel . For example, in the TDD communication mode, the first downlink channel and the first uplink channel are completely reciprocal; in the FDD communication mode, the first downlink channel and the first uplink channel are also partially reciprocal. sex. Therefore, the phase of the first downlink channel can be approximated as the phase of the first uplink channel, which can be used to determine the first precoding. Therefore, the network device may also determine the first precoding based on the phase of the first downlink channel. The first precoding thus determined can also be adapted to the first uplink channel to a certain extent.

In this implementation manner, the network device may receive the first channel information in step 201b, and the first channel information may be used to indicate the phase of the first downlink channel. Correspondingly, in step 201b, the first terminal device sends the first channel information.

Optionally, the frequency domain resource of the first uplink channel overlaps with the frequency domain resource of the first downlink channel based on the measurement of the first terminal device. For example, the frequency domain resource of the first uplink channel is a part of the frequency domain resource of the first downlink channel. Or, the frequency domain resource of the first downlink channel is a part of the frequency domain resource of the first uplink channel. Or, the frequency domain resource of the first downlink channel is the same as the frequency domain resource of the first uplink channel. This is because the measurement result of the first downlink channel by the first terminal device is more suitable for determining the first precoding within the range of the measured frequency domain resources, and the determined first precoding can also be more compatible with the first uplink channel. adaptation.

Optionally, the first terminal device may also send the first channel information based on the reporting granularity.

Here, the reporting granularity may refer to the frequency domain granularity on which the first terminal device reports the first channel information. The first channel information sent by the first terminal device based on the reporting granularity may be used to indicate the phase of the channel corresponding to the reporting granularity.

Since the first channel information sent by the first terminal device is used to indicate the phase of the channel corresponding to the reporting granularity, the first terminal device may measure the first downlink channel based on the reporting granularity to obtain the corresponding report granularity. The phase of the channel. Therefore, from another perspective, the reporting granularity can also be referred to as the measurement granularity. As an example and not a limitation, the reporting granularity may be a subband, for example. Of course, the reporting granularity can also be other possible frequency domain granularity. This application does not limit this.

The reporting granularity may be pre-defined, such as a protocol; it may also be indicated by the network device through signaling in advance. This application does not limit this.

Optionally, the method further includes: the network device sending indication information of the reporting granularity. Correspondingly, the first terminal device receives the indication information of the reporting granularity.

A possible situation is that the network device can reuse the reporting granularity of the channel measurement configuration in the existing signaling, or in other words, the reporting granularity mentioned in the embodiment of the present application can use the existing channel measurement reporting granularity. As an example and not a limitation, the existing signaling may be a channel state information (channel state information, CSI) reporting (CSI reporting) configuration.

In step 201b, the first terminal device may indicate the phase of the first downlink channel in many ways. In an implementation manner, the protocol may predefine a codebook, the codebook may include M ₁ (M ₁ > 1, and is an integer) codewords, and the _{phase of the M 1} codewords may be between 0 and 2π Divide equally within the range.

As an example, the codebook may include the following M ₁ codewords:

The phases of the M ₁ codewords are 0 respectively,

It can be seen that the _{phase of the M 1} codewords is equally divided into M ₁ parts in the range of 0 to 2π. Each codeword can correspond to a phase.

Assume that the phase of the first downlink channel is denoted as σ ₁ . When the first terminal device indicates the phase σ _{1 of} the first downlink channel through the first channel information, for example, it may _{indicate the phase σ 1 of the M 1} code words with the same or the closest _{phase to σ 1.} Among the M ₁ codewords, the codeword whose phase is the _{same as or closest to σ 1} may be referred to as the codeword corresponding to the _{phase σ 1 of the first downlink channel.} The first terminal device is determined from a codebook σ phase during _a corresponding codeword, i.e. the process of determining the phase quantized value of ₁ σ. The first terminal device may indicate the quantized value of _{the phase σ 1 through the first channel information.}

In one implementation, the first terminal device may be determined from the M ₁ codewords out of phase with the first downlink channel angle σ ₁ is the smallest code word, the code word as the first The quantized value of the phase σ _{1 of the channel information is indicated.}

The first terminal device can indicate the quantized value of the _{phase σ 1 in many ways.} For example, the protocol may predefine a one-to-one correspondence between _{the M 1} codewords and M _{1 indexes.} The M ₁ indexes may be _{m 1} _{in the aforementioned M 1} codewords, for example. The first terminal device may carry the _{index m 1} of the quantized value of _{the phase σ 1} in the first channel information to indicate the quantized value of _{the phase σ 1.}

This application does not limit the specific value of the number of codewords M _{1 in the codebook.} It can be understood that the _{larger the value of M 1} , the finer the granularity of the angle division, and the more accurate the indication _{of the phase σ 1 will be.}

It should be understood that the specific indication manner of the phase of the first downlink channel by the first terminal device exemplified above is only an example, and should not constitute any limitation in this application. This application does not limit the specific manner in which the first channel information is used to indicate the phase of the first downlink channel.

In step 202, the network device determines the first precoding.

In the embodiment of the present application, the first precoding is a scalar, and therefore may be referred to as scalar precoding. The first precoding can be used to precode the first uplink signal after BPSK, and the first uplink signal can be transmitted through the first uplink channel. Specifically, the first precoding may rotate the phase of the first uplink channel in a process of precoding the modulation symbols of the first uplink signal. Since the precoding operation is to precode the modulation symbols after BPSK, that is, to precode the constellation obtained by BPSK, the precoding operation can be called constellation precoding (CP).

In the case where only the first terminal device sends the first uplink signal to the network device, the received signal r of the precoded first uplink signal by the network device can be expressed as:

Among them, _{the meanings represented by h 1} , γ ₁ , α ₁ , and s ₂ can be referred to the foregoing. x ₁ represents the first precoding, and β ₁ represents the phase of the first precoding. It can be seen that in the received signal of the first uplink signal by the network device, the phase changes from α ₁ to α ₁ +β ₁ .

The network device may determine the phase of the first precoding based on the phase of the first uplink channel, and then determine the first precoding. The first precoding thus determined is scalar precoding, and precoding is achieved by rotating the phase of the channel. Compared with the precoding operation of performing weighting processing on the signal of each transmit antenna port in the prior art, the constellation precoding proposed in this application has lower complexity and simpler operation.

As mentioned earlier, in MU-MIMO, multiple terminal devices may use the same time-frequency resources to communicate with the same network device. The time-frequency resource corresponding to the first uplink channel may also be transmitted with other uplink channels, such as the second uplink channel. The second uplink channel may transmit uplink signals of other terminal equipment, such as the second uplink signal from the second terminal equipment. The received signal obtained by the network device can be expressed as:

Among them, h ₂ represents the second uplink channel, γ ₂ represents the amplitude of the second uplink channel, and α ₂ represents the phase of the second uplink channel; x ₂ represents the second precoding, and s ₂ represents the second uplink signal.

To improve the reception quality of the first uplink signal, the interference caused by the second uplink signal can be eliminated through the design of the first precoding.

In BPSK modulation, the network device only needs to detect the real part of the original modulation symbol. In this way, when using matched filter (MF) detection, it can be found that the real part y of the signal detected by MF can be expressed as:

Among them, Re() represents the real part.

Indicates the interference caused by the transmission of the second uplink signal. Therefore, as long as the interference is reduced, the reception quality of the first uplink signal can be improved.

From further observation, it can be found that as long as cos(α ₂ -β ₁ -α ₁ )=0 is satisfied, the transmission of the second uplink signal will not cause interference to the reception of the first uplink signal. That is, when β ₁ =α ₂ -α ₁ ±π/2, the transmission of the second uplink signal will not cause interference to the reception of the first uplink signal. Therefore, when the value of the phase of the first precoding can be infinitely close to α ₂ -α ₁ ±π/2, the interference caused by the transmission of the second uplink channel to the reception of the first uplink signal can be infinitely small.

In a possible design, the phase β _{1 of the} first precoding may be designed to be in _{the range of α 2} -α ₁ ±π/2.

It can be seen from this that the network device can determine the first precoding based on the phase of the first uplink channel and the phase of the second uplink channel. As mentioned above, in some cases, the phase of the first uplink channel may be replaced by the phase of the first downlink channel based on the reciprocity of the uplink and downlink channels. Similarly, the phase of the second uplink channel can also be replaced by the phase of the second downlink channel. If the phase of the second downlink channel is denoted as σ ₂ . Then the above formula can be further extended to:

σ ₂ -σ ₁ ±π/2, or σ ₂ -α ₁ ±π/2, or α ₂ -σ ₁ ±π/2.

In addition, since the cosine function is a periodic function that circulates in the range of 0 to 2π, the above ±π/2 can be understood as an odd multiple of π/2, or the left or right side of the above formula can be either Extend within the range of integer multiples of ±2π.

Optionally, the method 200 further includes: step 203: the network device obtains the phase of the second uplink channel or the phase of the second downlink channel.

Similar to that described in step 201, the second uplink channel may be, for example, an uplink channel between the network device and the second terminal device. The second downlink channel may be, for example, a downlink channel between the network device and the second terminal device. Since both the second downlink channel and the second uplink channel are the channels between the second terminal device and the network device, they can be implemented through, for example, frequency division duplexing (FDD) and time division duplexing (TDD). ) And other communication modes to realize the transmission of uplink and downlink signals. Therefore, it can be considered that the second uplink channel corresponds to the second downlink channel.

If the network device obtains the phase of the second downlink channel by receiving the second channel information from the second terminal device, optionally, the frequency domain resource of the second uplink channel is the same as the frequency of the second downlink channel on which the second terminal device measures. There is overlap in domain resources. For example, the frequency domain resource of the second uplink channel is a part of the frequency domain resource of the second downlink channel. Or, the frequency domain resource of the second downlink channel is a part of the frequency domain resource of the second uplink channel. Or, the frequency domain resource of the second downlink channel is the same as the frequency domain resource of the second uplink channel. This is because the measurement result of the second downlink channel by the second terminal device is more suitable for determining the second precoding within the range of the measured frequency domain resources, and the determined second precoding can also be more suitable for the second uplink channel. match.

The specific implementation manner of the network device performing step 203 may be similar to the specific implementation manner of the network device performing step 201. For example, the network device may obtain the phase of the second uplink channel based on the measurement of the uplink channel, or receive the second channel from the second terminal device. Information to obtain the phase of the downlink channel. Since these two implementations have been described in detail in step 201 above, for the sake of brevity, they will not be repeated here.

Hereinafter, for ease of understanding and explanation, it is assumed that the network device obtains the phase of the first downlink channel as σ ₁ in step 201 and obtains the phase of the second downlink channel as σ ₂ in step 203. The network device may determine the phase of the first precoding based on the acquired phases σ ₁ and σ ₂ , and then determine the first precoding.

It can be understood that in the multiple possible situations shown below, the phase σ _{1 of the} first downlink channel can be replaced with the phase α ₁ of the first uplink channel, and the phase σ _{2 of the} second downlink channel can be replaced with the second uplink channel. The phase α ₂ . For the sake of brevity, the following will not expand on each case one by one.

A possible situation is that the network device determines that the phase σ ₂ of the second uplink channel is 0, and the above formula can be further transformed into β ₁ =±π/2-σ ₁ . In this case, the network device may directly determine the phase β _{1 of the} _{first precoding based on the phase σ 1 of the} first uplink channel.

Another possible situation is that the network device may have failed to obtain the phase of the second uplink channel and the phase of the second downlink channel in a recent period of time. _{In this case, the value of α 2} or σ ₂ can be estimated based on one or more previous measurements on the second uplink channel, or one or more previous measurements on the second downlink channel, and then the value of _{α 2 or σ 2 can be determined from α 2} -α ₁ ± π/2 or σ ₂ -σ ₁ ±π/2 or σ ₂ -α ₁ ±π/2 or α ₂ -σ ₁ ±π/2 to determine the phase β _{1 of the} first precoding.

As an embodiment, the network device may further determine a second precoding, and the second precoding may be used to precode the modulation symbols of the second uplink signal. As mentioned above, the second uplink signal and the first uplink signal can be transmitted through the same time-frequency resource, that is, the first uplink channel used to transmit the first uplink signal and the second uplink channel used to transmit the second uplink signal. The channel overlaps, and the phase of the second precoding is denoted as β ₂ , for example, and the received signal r'obtained by the network device can be expressed as:

Among them, h ₂ represents the second uplink channel, γ ₂ represents the amplitude of the second uplink channel, σ ₂ represents the phase of the second uplink channel; x ₂ represents the second uplink signal; s ₂ represents the second uplink signal; β ₂ represents the first uplink signal. Two precoding phase. As mentioned earlier, σ ₁ in the formula can be replaced by α ₁ , and σ ₂ can be replaced by α ₂ .

The network device can eliminate the mutual interference between the first uplink signal and the second uplink signal by designing the first precoding and the second precoding, so as to achieve the effect of improving the reception quality. Optionally, the method 200 further includes: step 204, the network device determines the second precoding.

In BPSK modulation, the network equipment only needs to detect the real part of the original modulation symbol, so when using matched filter (match filter, MF) detection, if the first uplink signal is taken as an example, the real part y of the signal detected by MF can be Expressed as:

Among them, Re() represents the real part.

From further observation, it can be found that as long as cos(β ₂ +σ ₂ -β ₁ -σ ₁ )=0 is satisfied, the transmission of the second uplink signal will not cause interference to the reception of the first uplink signal. That is, β ₂ -β ₁ =σ ₂ -σ ₁ ±π/2. The transmission of the second uplink signal will not cause interference to the reception of the first uplink signal. Thus, when the phase of a first pre-encoding beta] phase beta] ₁ and the second pre-encoding the difference value β ₂ _{2 -β} ₁ can be infinitely approaching _{_{σ 2 -σ 1 ± π / 2}} , the first and second uplink signal The mutual interference between the uplink signals can then tend to zero.

In a possible design, the network device can control the difference β _2- β ₁ _{between the first precoding phase β 1} and the second precoding phase β ₂ _{to σ 2} -σ by designing the first precoding phase β 1 and the second precoding phase β 2. _{Within the range of 1} ±π/2.

In the case where the phase of the first pre-encoding β ₁ is determined, i.e., the step 202 has been performed, the network device may be determined according to the value of β ₁ β ₂ of.

In an implementation manner, the network device may determine the first precoding phase β ₁ and the second precoding phase β ₂ _{based on the phase α 1 of the} first uplink channel and the phase α _{2 of the} second uplink channel. That is, the above step 204 and step 202 can be combined into one step to be executed, and the network device can determine the first precoding and the second precoding at the same time.

In an example, the phase β ₁ of the first precoding is 0, and the phase β ₂ of the _{second precoding is σ 2} -σ ₁ ±π/2.

In another example, the phase β ₁ of the first precoding is ±π/2, and the phase β ₂ of the _{second precoding is σ 2} -σ ₁ .

In another example, the phase β ₂ of the second precoding is 0, and the phase β ₁ of the _{first precoding is σ 2} -σ ₁ ±π/2.

In another example, the phase β ₂ of the second precoding is ±π/2, and the phase β ₁ of the _{first precoding is σ 2} -σ ₁ .

It can be understood that when the phase of one of the first precoding and the second precoding is designed to be 0, it is equivalent to not performing the precoding operation on one of the first uplink signal and the second uplink signal. One of the terminal devices does not perform the precoding operation, for example, the phase of the second precoding is 0, then the second terminal device may not perform the precoding operation on the second uplink signal, but only the first terminal device needs to perform the precoding operation on the second uplink signal. The precoding operation of an uplink signal can eliminate the mutual interference between the first uplink signal and the second uplink signal.

Of course, the network device may also design the first precoding phase β ₁ and the second precoding phase β _{2 to} be non-zero values, which is not limited in this application. As long as the phase β _{1 of the} first precoding and the phase β _{2 of the} second precoding satisfy the range of β _2- β ₁ =σ ₂ -σ ₁ ±π/2, they should fall within the protection scope of this application.

In step 205, the network device sends first indication information, where the first indication information is used to indicate the first precoding. Correspondingly, in step 205, the first terminal device receives the first indication information.

In an implementation manner, the protocol may predefine a codebook, which may include M ₂ (M ₂ ＞1, and is an integer) codewords, and the _{phase of the M 2} codewords may be between 0 and 2π Divide equally within the range.

As an example, the codebook may include the following M ₂ codewords:

The phases of the M ₂ codewords are 0 respectively,

It can be seen that the _{phases of the M 2} codewords are equally divided into M ₂ parts in the range of 0 to 2π. Each codeword can correspond to a phase.

The network device may determine the codeword that is the _{same as or closest to the phase β 1 of} _{the first precoding from the M 2} codewords of the codebook, and determine the codeword as the phase β _{1 of the first precoding.} Corresponding code word. The network device determines from the codebook beta] phase with a procedure corresponding _codeword, i.e. the process of determining the quantized value of the phase β _1. Indicate that the network device may be quantized values of the phase β ₁ is the first indication information.

There are many network devices for the quantized values indicates how the phase β _1. For example, the protocol may predefine the one-to-one correspondence between _{the M 2} codewords and the M _{2 indexes.} The M ₂ indexes may be, for example, m ₂ _{in the above M 2} codewords. The network device may carry the index of the quantized phase values β ₁ in the first indication information to indicate a quantized value of the phase β _1.

The network device can also indicate the quantized value of the phase β ₁ _{through a bitmap with a length of M 2.} The M ₂ bits in the bitmap correspond to M ₂ codewords one-to-one. When the quantized values to indicate the phase is beta] ₁ by the bit map, for example, in the bit position of the selected code word corresponding to "1", while the other bit positions "0."

This application does not limit the specific value of the value _{M 2} of the number of codewords in the codebook. It can be understood that the _{larger the value of M 2} , the finer the granularity of the angle division, and the more accurate the indication _{of the phase β 1 will be.}

Optionally, M ₂ is the same as _{M 1.} The codebook used by the terminal device to indicate the phase of the downlink channel and the codebook used by the network device to indicate the phase of precoding may be codebooks with the same accuracy. A possible situation is that the codebook used by the terminal device to indicate the phase of the downlink channel and the codebook used by the network device to indicate the phase of precoding are the same codebook. In this case, the network equipment and the terminal equipment can complete the channel phase and precoding phase indications through the same codebook, which can save storage space.

Optionally, M ₂ is different from M _1. The codebook used by the terminal device to indicate the phase of the downlink channel and the codebook used by the network device to indicate the phase of precoding may be codebooks with different precisions. In this case, each codebook can be designed separately based on different requirements for accuracy.

The network device may further indicate the first precoding to the first terminal device based on the precoding granularity.

Here, the precoding granularity may refer to the granularity based on precoding the uplink signal. For example, it may be the granularity on which the first terminal device precodes the first uplink signal in this embodiment.

As an example and not a limitation, the precoding granularity may be, for example, a precoding resource block group (precoding resource block group), or a subband, and so on. The precoding granularity may also be other possible frequency domain granularity, which is not limited in this application.

Optionally, the method 200 further includes: step 206, the network device sends indication information of precoding granularity. Correspondingly, in step 206, the first terminal device receives the indication information of the precoding granularity.

Optionally, the precoding granularity is predefined. For example, the protocol may predefine the precoding granularity.

When instructing the first precoding, the network device may indicate one precoding for a block of resources with a precoding granularity. Assuming that the resources scheduled by the network device can be divided into multiple blocks of resources based on the precoding granularity, the network device can indicate the precoding corresponding to the multiple blocks of resources. In other words, when the network device indicates the first precoding through the first indication information, it may indicate multiple precodings corresponding to the precoding granularity.

The network device's indication of multiple precodings may refer to the method described above, for example, to indicate the corresponding codeword for each precoding in turn. For example, the index of the quantization value is used to indicate, or the bitmap is used to indicate. For the sake of brevity, I won't repeat them here.

The network device may also indicate multiple precodings corresponding to the multiple blocks of resources in a differential manner. For example, the precoding corresponding to one of the multiple resources is indicated by the above-mentioned method, and the other precoding is indicated by the difference component. For example, if multiple resources are recorded as resource 1 to resource N, the network device indicates the precoding 1 corresponding to resource 1 through the index or bitmap of the quantization value, and precoding corresponding to the remaining resources 2 to resource N, Indicate the difference between the phase of each precoding and the phase of precoding 1 respectively. Thereby, the effect of reducing feedback overhead can be achieved.

In addition, the precoding granularity and the reporting granularity (or measurement granularity) may be the same or different. This application does not limit this.

If the precoding granularity is the same as the reporting granularity (or measurement granularity), the network device can determine the first precoding corresponding to the precoding granularity according to the acquired phase of the first uplink channel or the first downlink channel corresponding to the reporting granularity .

If the precoding granularity is different from the reporting granularity (or measurement granularity), there may be two situations: first, the precoding granularity is greater than the reporting granularity (or measurement granularity); second, the precoding granularity is smaller than the reporting granularity (or measurement granularity).

In case 1, a precoding granularity may be an integer multiple or a non-integer multiple of a reporting granularity. The network device may determine the first precoding according to the acquired multiple phases of the first uplink channel or the first downlink channel corresponding to the reporting granularity (or measurement granularity).

For example, a precoding granularity is s ₁ , such as including s ₁ RB; a reporting granularity (or measurement granularity) is s ₂ , such as including s ₂ RBs, s ₁ >s ₂ . For example, for a piece of resource with a precoding granularity, the network device can calculate the corresponding piece of resource

Phase, determine the first precoding. in,

Indicates rounding up. Should

The first phase may be the phase of the first uplink channel or the phase of the first downlink channel. Exemplarily, the network device can calculate the

The average value of the two phases, and then determine the first precoding phase based on the average value, or the network device can be based on

Each of the two phases determines a pre-encoded phase, which in turn determines

The average value of the pre-encoded phases is used as the first pre-encoded phase.

Of course, network equipment can also be based on

Any one of the two phases determines the first precoding. In comparison, the first precoding determined by the above example is determined based on more channel information, and therefore may be more able to adapt to this block resource.

In the second case, since the precoding granularity is smaller than the reporting granularity (or measurement granularity), for a block of resources with a precoding granularity, the network device can use the first uplink channel or the first downlink channel corresponding to this block of resources. The phase is used to determine the first precoding corresponding to this block resource.

Optionally, the method 200 further includes: step 207, the network device sends second indication information, where the second indication information is used to indicate a modulation mode for the first uplink signal, and the modulation mode for the first uplink signal includes BPSK or π. /2-BPSK. Correspondingly, in step 207, the first terminal device receives the second indication information.

Optionally, the modulation mode for the first uplink signal is predefined. For example, the protocol can predefine what modulation method is used for the uplink signal. In this case, step 206 can be omitted.

Among them, BPSK can express 0 and 1 through two phases. π/2-BPSK means that the phase of the modulated signal of BPSK is shifted by π/2 when the odd-numbered bit of the sequence is in the sequence, and the phase of the even-numbered bit of the sequence is the same as that of BPSK, that is, 0 and 1 are represented by four phases. Regarding the specific implementation process of BPSK and π/2-BPSK, reference may be made to the prior art. For the sake of brevity, this article will not elaborate.

In this embodiment of the application, if the network device schedules the same time-frequency resource for the first terminal device and the second terminal device for uplink signal transmission, that is, the first uplink channel and the second uplink channel occupy the same time-frequency resource. Resource, in other words, the first uplink channel or the second uplink channel overlap, the network device can determine and indicate the first precoding and the second precoding according to the formula listed above, and the first terminal device and the second terminal device can Based on the instructions of the network equipment respectively, the mutual interference between the two is eliminated through the precoding operation.

Of course, the first uplink channel and the second uplink channel may also partially overlap. For example, the first uplink channel and the second uplink channel partially overlap in the time domain and/or frequency domain. This application does not limit this.

In addition, if the network device determines the first precoding and the second precoding based on the first channel information fed back by the first terminal device and the second channel information fed back by the second terminal device, the frequency domain resources of the first uplink channel may fall on Within the measurement bandwidth of the first downlink channel, the frequency domain resources of the second uplink channel may fall within the measurement bandwidth of the second downlink channel, thereby facilitating obtaining the first uplink channel and the second uplink channel adapted to the second uplink channel. A precoding and a second precoding.

Figure 3 shows the first uplink channel, the second uplink channel, and the corresponding measurement bandwidth of the first downlink channel and the measurement bandwidth of the second downlink channel. As shown in the figure, the first uplink channel and the second uplink channel are shaded in the figure. Since the first uplink channel and the second uplink channel occupy the same time-frequency resources, they are the same block of resources in the figure. The first uplink channel is an uplink transmission resource that can be used by the first terminal device to transmit the first uplink signal, and the second uplink channel is an uplink transmission resource that can be used by the second terminal device to transmit the second uplink signal. The measurement bandwidth of the first downlink channel corresponding to the first uplink channel is shown in measurement bandwidth 1 in the figure, and the measurement bandwidth of the second downlink channel corresponding to the second uplink channel is shown in measurement bandwidth 2 in the figure. Since the first uplink channel falls in the measurement bandwidth 1 and the second uplink channel falls in the measurement bandwidth 2, the measurement bandwidth 1 and the measurement bandwidth 2 are at least in the frequency domain resources of the first uplink channel (or the second uplink channel). Overlap. It should be understood that the figures shown in the figure are only examples and should not constitute any limitation to the application. For example, measurement bandwidth 1 and measurement bandwidth 2 can also be completely overlapped.

Based on this, after the network device indicates the first precoding to the first terminal device, it may further indicate the second precoding to the second terminal device.

Optionally, the method further includes: step 208, the network device sends fourth indication information, where the fourth indication information is used to indicate the second precoding. Correspondingly, in step 208, the second terminal device receives the fourth indication information.

The specific process of the network device indicating the second precoding to the second terminal device through the fourth indication information is similar to the specific process of step 205 described above, because the specific process has been described in detail in step 205 above. For the sake of brevity, I won't repeat them here.

In a possible design, the phase of the second precoding is a predefined value. Optionally, the predefined value is 0 or ±π/2.

The predefined value may be predefined by a protocol, or determined through pre-negotiation between the network device and the terminal device, for example. In this case, the network device may not indicate the second precoding. Step 208 may be omitted, and the network device may indicate the first precoding to the first terminal device through step 205.

The predefined value may also be instructed by the network device to the second terminal device through step 208. This application does not limit this.

Optionally, the method further includes: step 209, the network device sends indication information of precoding granularity. Correspondingly, in step 209, the second terminal device receives the indication information of the precoding granularity.

The network device can notify each terminal device in the cell of the precoding granularity through the same signaling. In this case, the above step 206 and step 209 can be combined into one step to be executed.

The network device may also indicate the precoding granularity to each terminal device through different signaling. In this case, the above step 206 and step 209 can be performed as two independent steps.

In addition, as mentioned above, the precoding granularity may be predefined. In this case, the above steps 206 and 209 can be omitted.

Optionally, the method further includes: step 210, the network device sends fifth indication information, where the fifth indication information is used to indicate the modulation mode for the second uplink signal, and the modulation mode for the second uplink signal is BPSK or π/ 2-BPSK. Correspondingly, the second terminal device receives the fifth indication information.

The network device can notify the first terminal device and the second terminal device of the modulation mode for the first uplink signal and the second uplink signal in the same signaling. For example, the signaling is sent by multicast. In this case, the above step 207 and step 210 can be combined into one step to be executed.

The network equipment may also indicate to each terminal equipment the modulation mode of the respective uplink signal through different signaling. In this case, the above step 207 and step 210 can be performed as two independent steps.

As mentioned earlier, the modulation method for the uplink signal can also be predefined. Therefore, the above steps 207 and 210 can also be omitted.

A possible design is that the modulation mode of the first uplink signal by the first terminal device is the same as the modulation mode of the second uplink signal by the second terminal device. For example, all adopt BPSK modulation method, or all adopt π/2-BPSK modulation method.

When the first terminal device uses the BPSK modulation method for the first uplink signal, and the second terminal device also uses the BPSK modulation method for the second uplink signal, the network device receives the first uplink signal in the first uplink channel. The phase and the phase of the second uplink channel are unchanged, and in the received signal of the second uplink signal by the network device, the phase of the first uplink channel and the phase of the second uplink channel are also unchanged. Therefore, the network device may determine the first precoding and the second precoding based on the formulas listed above.

When the first terminal device uses the π/2-BPSK modulation method for the first uplink signal and the second terminal device also uses the π/2-BPSK modulation method for the second uplink signal, the π/2-BPSK performs BPSK on the signal The phase of the subsequent modulation symbol is deflected. For example, taking the signal on the nth RE on the time-frequency resource used to transmit the uplink signal as an example, the symbol after π/2-BPSK is denoted as z _n , and the symbol after BPSK is denoted as d _n , then z _n =j ⁿ ·d _n . In combination with the above formula, it can be found that if the first uplink signal and the second uplink signal are modulated by π/2-BPSK, the phase of the received signal obtained by the network device will change.

For example, the modulation symbol of the first uplink signal after π/2-BPSK is deflected by π/2 compared to the modulation symbol after BPSK, and the modulation symbol of the second uplink signal after π/2-BPSK is greater than the modulation symbol after BPSK. Also deflected by π/2. However, it can be found that the two can cancel each other, so the phases of the first precoding and the second precoding can still satisfy the above formula. Taking the received signal of the first uplink signal by the network device as an example, the real part y'of the received signal is:

Therefore, in order to eliminate the mutual interference between the _two , the difference β _2- β ₁ _{between the first precoding phase β 1} and the second precoding phase β 2 should be infinitely close to σ ₂ -σ ₁ ±π /2 is fine.

In some cases, when the first terminal equipment and the second terminal equipment respectively adopt the π/2-BPSK modulation mode, they may perform π/2-BPSK on the first uplink signal and the second uplink signal on the same RE. The phase of the subsequent modulation symbol is different from that of the BPSK modulation symbol. For example, the modulation symbol of the first uplink signal is rotated by π/2, and the modulation symbol of the second uplink signal is rotated by π, and the two cannot cancel each other. Taking the received signal of the first uplink signal by the network device as an example, the real part y'of the received signal is:

To eliminate the mutual interference between the _two , the difference β ₂ -β ₁ _{between the first precoding phase β 1} and the second precoding phase β 2 should be infinitely close to σ ₂ -σ ₁ or infinitely close It is sufficient _{to be within σ 2} _{-σ 1} ±π.

Or, when the first terminal equipment and the second terminal equipment respectively adopt the π/2-BPSK modulation mode, the first uplink signal and the second uplink signal are modulated by π/2-BPSK on the same RE. The phase of the modulation symbol rotation after BPSK is different. For example, the modulation symbol of the first uplink signal is rotated by π/2, and the modulation symbol of the second uplink signal is rotated by 3π/2, and the two cannot cancel each other. Taking the received signal of the first uplink signal by the network device as an example, the real part y'of the received signal is:

In order to eliminate the mutual interference between the _two , the difference β _2- β ₁ _{between the first precoding phase β 1} and the second precoding phase β 2 should be infinitely close to σ ₂ -σ ₁ ±π/2 That's it.

Based on the above, it can be found that when the first uplink signal and the second uplink signal are transmitted through the same time-frequency resource, the network device only needs to know the modulation method for the first uplink signal and the modulation method for the second uplink in advance. , And when the modulation mode is π/2-BPSK, the phase rotation angle of the modulation symbol on each RE can be modified based on the formula listed above to determine the phase sum of the first precoding The phase of the second precoding. Therefore, even if different modulation methods are used for the first uplink signal and the second uplink signal, for example, one uses BPSK and the other uses π/2-BPSK, the phase of the first precoding and the first precoding can still be determined based on the same concept. Two precoding phase.

In an implementation manner, the phase of the modulation symbol generated after performing π/2-BPSK on the first uplink signal and the second uplink signal may be restricted.

For example, the phase of a certain designated RE on the time-frequency resource used to transmit the first uplink signal and the second uplink signal is restricted to π/2 or -π/2. For example, specify that the phase of the first RE on the time-frequency resource is π/2 or -π/2.

In this case, the phase deflection angles of the two uplink signals are the same and can cancel each other. The network device may still determine the phase of the first precoding and the phase of the second precoding based on the formulas listed above.

The phase of the modulation symbol generated after performing π/2-BPSK on the first uplink signal and/or the second uplink signal may be indicated by the network device through signaling.

Optionally, the method further includes: step 211, the network device sends third indication information, the third indication information indicating the phase of the modulation symbol obtained after performing π/2-BPSK on the first uplink signal. Correspondingly, in step 211, the first terminal device receives the third indication information.

Optionally, the method further includes: step 212, the network device sends sixth indication information, where the sixth indication information is used to indicate the phase of the modulation symbol obtained after performing π/2-BPSK on the second uplink signal. Correspondingly, in step 212, the second terminal device receives the sixth indication information.

The network device can notify the first terminal device and the second terminal device of the phase of the modulation symbol generated after performing π/2-BPSK in the same signaling. In this case, the above step 211 and step 212 can be combined into one step to be executed.

The network device may also indicate to each terminal device the phase of the modulation symbol generated after performing π/2-BPSK through different signaling. In this case, the above-mentioned step 211 and step 212 can be performed as two independent steps.

Optionally, the phase of the modulation symbol obtained after performing π/2-BPSK on the uplink signal is a predefined value. For example, the protocol can predefine the phase of the modulation symbol obtained after performing π/2-BPSK on the uplink signal. That is, the direction of the above offset may be predefined by the protocol. For example, the protocol predefines the phase on a specified RE as π/2, or the protocol predefines the phase on a specified RE as -π/2. In this case, step 211 and step 212 can be omitted. It should be understood that this application does not limit the specific value of the predefined value.

In addition, when the network device indicates the modulation mode to the first terminal device through the second indication information, and indicates the phase of the modulation symbol obtained after π/2-BPSK is performed through the third indication information, the second indication information and the third indication The information may be information carried in the same signaling or information carried in different signaling, which is not limited in this application.

When the network device indicates the modulation mode to the second terminal device through the fifth indication information, and indicates the phase of the modulation symbol obtained after π/2-BPSK is performed through the sixth indication information, the fifth indication information and the sixth indication information may be It is the information carried in the same signaling, or it may be the information carried in different signaling, which is not limited in this application.

The network equipment can also indicate the modulation mode for the first uplink signal and the modulation mode for the second uplink signal through the same signaling, and the phase of the modulation symbol obtained after π/2-BPSK. That is, the foregoing second indication information, second indication information, fifth indication information, and sixth indication information may be carried in the same signaling.

Alternatively, the phase of the modulation symbol obtained after performing π/2-BPSK on the uplink signal may be a predefined value. In the case that the network device indicates that the modulation mode is π/2-BPSK, the terminal device can directly The predefined value determines the phase of the modulation symbol.

In step 213, the first terminal device precodes the modulation symbols of the first uplink signal to obtain the precoded first uplink signal; and in step 214, sends the first uplink signal through the first uplink channel. Correspondingly, in step 214, the network device receives the precoded first uplink signal.

In step 215, the second terminal device precodes the modulation symbols of the second uplink signal to obtain the precoded second uplink signal; and in step 216, transmits the second uplink signal through the second uplink channel. Correspondingly, in step 216, the network device receives the precoded second uplink signal.

Since the process of precoding the modulation symbols has been described in detail above in conjunction with the formula, for the sake of brevity, it will not be repeated here.

The process for the first terminal device to send the first uplink signal to the network device through the first uplink channel and the process for the second terminal device to send the second uplink signal to the network device through the second uplink channel can refer to the prior art. For brevity, this article Do not elaborate.

In addition, when there are two uplink signal transmissions on the same time-frequency resource, the precoding can be determined for the transmission of the two uplink signals based on the phase of the uplink channel or the downlink channel. One of the two uplink signals after precoding is Interference between them can be eliminated, which is beneficial for network equipment to obtain better reception quality, and is beneficial for improving system transmission performance.

It should be understood that, in the above embodiments, the terminal device and/or the network device may perform part or all of the steps in the embodiments. These steps or operations are only examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, each step may be performed in a different order presented in each embodiment, and it may not be necessary to perform all operations in the embodiments of the present application. Moreover, the size of the sequence number of each step does not mean the order of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Fig. 4 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 4, the communication device 1000 may include a processing unit 1100 and a transceiving unit 1200.

Optionally, the communication device 1000 may correspond to the first terminal device in the above method embodiment, for example, it may be the first terminal device, or a component (such as a circuit, a chip, or a chip system) configured in the first terminal device. Wait).

It should be understood that the communication device 1000 may correspond to the first terminal device in the method 200 according to the embodiment of the present application, and the communication device 1000 may include a unit for executing the method executed by the first terminal device in the method 200 in FIG. 2 . In addition, the units in the communication device 1000 and the other operations and/or functions described above are respectively intended to implement the corresponding process of the method 200 in FIG. 2.

Wherein, when the communication device 1000 is used to perform the method 200 in FIG. 2, the processing unit 1100 can be used to perform step 213 in the method 200, and the transceiver unit 1200 can be used to perform step 201b, step 205 to step 207, and step 207 in the method 200. Step 211 and step 214. It should be understood that the specific process for each unit to execute the foregoing corresponding steps has been described in detail in the foregoing method embodiment, and is not repeated here for brevity.

It should be understood that the communication device 1000 may correspond to the second terminal device in the method 200 according to the embodiment of the present application, and the communication device 1000 may include a unit for executing the method executed by the second terminal device in the method 200 in FIG. 2 . In addition, each unit in the communication device 1000 and other operations and/or functions described above are used to implement the corresponding process of the method 200 in FIG. 2.

Wherein, when the communication device 1000 is used to execute the method 200 in FIG. 2, the processing unit 1100 can be used to execute step 215 in the method 200, and the transceiver unit 1200 can be used to execute step 203, step 208 to step 210, and step 203 of the method 200. 212 and step 216. It should be understood that the specific process for each unit to execute the foregoing corresponding steps has been described in detail in the foregoing method embodiment, and is not repeated here for brevity.

It should also be understood that when the communication device 1000 is a terminal device (for example, the first terminal device or the second terminal device described above), the transceiver unit 1200 in the communication device 1000 may be implemented by a transceiver, for example, it may correspond to the one shown in FIG. 5 The transceiver 2020 in the communication device 2000 or the transceiver 3020 in the terminal device 3000 shown in FIG. 6, the processing unit 1100 in the communication device 1000 may be implemented by at least one processor, for example, may correspond to The processor 2010 in the communication device 2000 or the processor 3010 in the terminal device 3000 shown in FIG. 6.

It should also be understood that when the communication device 1000 is a chip or a chip system configured in a terminal device (for example, the aforementioned first terminal device or the second terminal device), the transceiver unit 1200 in the communication device 1000 may use an input/output interface, The processing unit 1100 in the communication device 1000 may be implemented by a processor, a microprocessor, or an integrated circuit integrated on the chip or a chip system.

Optionally, the communication device 1000 may correspond to the network device in the above method embodiment, for example, it may be a network device, or a component (such as a circuit, a chip, or a chip system, etc.) configured in the network device.

It should be understood that the communication device 1000 may correspond to the network device in the method 200 according to the embodiment of the present application, and the communication device 1000 may include a unit for executing the method executed by the network device in the method 200 in FIG. 2. In addition, each unit in the communication device 1000 and other operations and/or functions described above are used to implement the corresponding process of the method 200 in FIG. 2.

Wherein, when the communication device 1000 is used to execute the method 200 in FIG. 2, the processing unit 1100 can be used to execute steps 201a, 202 to step 204 in the method 200, and the transceiver unit 1200 can be used to execute steps 201b, 201b, and 204 in the method 200. Step 205 to step 212, step 214, and step 216. It should be understood that the specific process for each unit to execute the foregoing corresponding steps has been described in detail in the foregoing method embodiment, and is not repeated here for brevity.

It should also be understood that when the communication device 1000 is a network device, the transceiver unit 1200 in the communication device 1000 may be implemented by a transceiver, for example, it may correspond to the transceiver 2020 in the communication device 2000 shown in FIG. 5 or the transceiver 2020 in FIG. 7 As shown in the RRU 4100 in the base station 4000, the processing unit 1100 in the communication device 1000 may be implemented by at least one processor, for example, may correspond to the processor 2010 in the communication device 2000 shown in FIG. 5 or the processor 2010 shown in FIG. The processing unit 4200 or the processor 4202 in the base station 4000 is output.

It should also be understood that when the communication device 1000 is a chip or a chip system configured in a network device, the transceiver unit 1200 in the communication device 1000 can be implemented through input/output interfaces, circuits, etc., and the processing unit 1100 in the communication device 1000 It can be implemented by a processor, microprocessor, or integrated circuit integrated on the chip or chip system.

FIG. 5 is another schematic block diagram of a communication device 2000 provided by an embodiment of the present application. As shown in FIG. 5, the communication device 2000 includes a processor 2010, a transceiver 2020, and a memory 2030. The processor 2010, the transceiver 2020, and the memory 2030 communicate with each other through an internal connection path. The memory 2030 is used to store instructions, and the processor 2010 is used to execute the instructions stored in the memory 2030 to control the transceiver 2020 to send signals and / Or receive the signal.

It should be understood that the communication apparatus 2000 may correspond to the terminal device in the foregoing method embodiment, and may be used to execute various steps and/or processes performed by the network device or terminal device in the foregoing method embodiment. Optionally, the memory 2030 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A part of the memory may also include a non-volatile random access memory. The memory 2030 may be a separate device or integrated in the processor 2010. The processor 2010 may be used to execute instructions stored in the memory 2030, and when the processor 2010 executes the instructions stored in the memory, the processor 2010 is used to execute each of the above method embodiments corresponding to the network device or the terminal device. Steps and/or processes.

Optionally, the communication apparatus 2000 is the first terminal device in the foregoing embodiment.

Optionally, the communication apparatus 2000 is the second terminal device in the foregoing embodiment.

Optionally, the communication device 2000 is the network device in the foregoing embodiment.

Among them, the transceiver 2020 may include a transmitter and a receiver. The transceiver 2020 may further include an antenna, and the number of antennas may be one or more. The processor 2010, the memory 2030, and the transceiver 2020 may be devices integrated on different chips. For example, the processor 2010 and the memory 2030 may be integrated in a baseband chip, and the transceiver 2020 may be integrated in a radio frequency chip. The processor 2010, the memory 2030, and the transceiver 2020 may also be devices integrated on the same chip. This application does not limit this.

Optionally, the communication device 2000 is a component configured in a terminal device, such as a circuit, a chip, a chip system, and so on.

Optionally, the communication device 2000 is a component configured in a network device, such as a circuit, a chip, a chip system, and the like.

Among them, the transceiver 2020 may also be a communication interface, such as an input/output interface, a circuit, and so on. The transceiver 2020, the processor 2010 and the memory 2020 may be integrated in the same chip, such as integrated in a baseband chip.

FIG. 6 is a schematic structural diagram of a terminal device 3000 provided in an embodiment of the present application. The terminal device 3000 can be applied to the system shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiment. As shown in the figure, the terminal device 3000 includes a processor 3010 and a transceiver 3020. Optionally, the terminal device 3000 further includes a memory 3030. Among them, the processor 3010, the transceiver 3020, and the memory 3030 can communicate with each other through an internal connection path to transfer control and/or data signals. The memory 3030 is used to store computer programs, and the processor 3010 is used to download from the memory 3030. Call and run the computer program to control the transceiver 3020 to send and receive signals. Optionally, the terminal device 3000 may further include an antenna 3040 for transmitting the uplink data or uplink control signaling output by the transceiver 3020 through a wireless signal.

The foregoing processor 3010 and the memory 3030 may be combined into a processing device, and the processor 3010 is configured to execute the program code stored in the memory 3030 to implement the foregoing functions. During specific implementation, the memory 3030 may also be integrated in the processor 3010 or independent of the processor 3010. The processor 3010 may correspond to the processing unit 1100 in FIG. 4 or the processor 2010 in FIG. 5.

The aforementioned transceiver 3020 may correspond to the transceiver unit 1200 in FIG. 4 or the transceiver 2020 in FIG. 5. The transceiver 3020 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the terminal device 3000 shown in FIG. 6 can implement various processes involving the terminal device (for example, the foregoing first terminal device or the second terminal device) in the method embodiment shown in FIG. 2. The operations and/or functions of each module in the terminal device 3000 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, please refer to the description in the foregoing method embodiment, and to avoid repetition, detailed description is omitted here as appropriate.

The above-mentioned processor 3010 can be used to execute the actions described in the previous method embodiments implemented by the terminal device, and the transceiver 3020 can be used to execute the terminal device described in the previous method embodiments to send to or receive from the network device. action. For details, please refer to the description in the previous method embodiment, which will not be repeated here.

Optionally, the aforementioned terminal device 3000 may further include a power supply 3050 for providing power to various devices or circuits in the terminal device.

In addition, in order to make the function of the terminal device more complete, the terminal device 3000 may also include one or more of the input unit 3060, the display unit 3070, the audio circuit 3080, the camera 3090, and the sensor 3100. The audio circuit It may also include a speaker 3082, a microphone 3084, and so on.

FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application, and may be, for example, a schematic structural diagram of a base station. The base station 4000 can be applied to the system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiment. As shown in the figure, the base station 4000 may include one or more radio frequency units, such as a remote radio unit (RRU) 4100 and one or more baseband units (BBU) (also known as distributed unit (DU) )) 4200. The RRU 4100 may be called a transceiver unit, and may correspond to the transceiver unit 1200 in FIG. 4 or the transceiver 2020 in FIG. 5. Optionally, the RRU 4100 may also be called a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 4101 and a radio frequency unit 4102. Optionally, the RRU 4100 may include a receiving unit and a sending unit. The receiving unit may correspond to a receiver (or receiver or receiving circuit), and the sending unit may correspond to a transmitter (or transmitter or transmitting circuit). The RRU 4100 part is mainly used for receiving and sending radio frequency signals and conversion between radio frequency signals and baseband signals, for example, for sending instruction information to terminal equipment. The 4200 part of the BBU is mainly used for baseband processing, base station control, and so on. The RRU 4100 and the BBU 4200 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 4200 is the control center of the base station, and can also be called a processing unit, which can correspond to the processing unit 1100 in FIG. 4 or the processor 2010 in FIG. 5, and is mainly used to complete baseband processing functions, such as channel coding and multiplexing , Modulation, spread spectrum and so on. For example, the BBU (processing unit) may be used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment, for example, to generate the foregoing indication information.

In an example, the BBU 4200 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access standard (such as an LTE network), or support different access standards. Wireless access network (such as LTE network, 5G network or other networks). The BBU 4200 further includes a memory 4201 and a processor 4202. The memory 4201 is used to store necessary instructions and data. The processor 4202 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the network device in the foregoing method embodiment. The memory 4201 and the processor 4202 may serve one or more boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

It should be understood that the base station 4000 shown in FIG. 7 can implement various processes involving network devices in the method embodiment shown in FIG. 2. The operations and/or functions of the various modules in the base station 4000 are to implement the corresponding procedures in the foregoing method embodiments. For details, please refer to the description in the foregoing method embodiment, and to avoid repetition, detailed description is omitted here as appropriate.

The above-mentioned BBU 4200 can be used to perform the actions described in the previous method embodiments implemented by the network device, and the RRU 4100 can be used to perform the actions described in the previous method embodiments that the network device sends to or receives from the terminal device. For details, please refer to the description in the previous method embodiment, which will not be repeated here.

It should be understood that the base station 4000 shown in FIG. 7 is only a possible form of network equipment, and should not constitute any limitation to this application. The method provided in this application can be applied to other types of network equipment. For example, it may include AAU, it may also include CU and/or DU, or it may include BBU and adaptive radio unit (ARU), or BBU; it may also be customer premises equipment (CPE), or it may be For other forms, this application does not limit the specific form of the network device.

Among them, the CU and/or DU can be used to perform the actions described in the previous method embodiment implemented by the network device, and the AAU can be used to perform the network device described in the previous method embodiment to send to or receive from the terminal device Actions. For details, please refer to the description in the previous method embodiment, which will not be repeated here.

The present application also provides a processing device, including at least one processor, and the at least one processor is configured to execute a computer program stored in a memory, so that the processing device executes the first terminal device, the first terminal device in any one of the foregoing method embodiments, and the The method executed by the second terminal device or network device.

It should be understood that the aforementioned processing device may be one or more chips. For example, the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or It is a central processor unit (CPU), it can also be a network processor (NP), it can also be a digital signal processing circuit (digital signal processor, DSP), or it can be a microcontroller (microcontroller unit). , MCU), it can also be a programmable logic device (PLD) or other integrated chips.

The embodiment of the present application also provides a processing device, including a processor and a communication interface. The communication interface is coupled with the processor. The communication interface is used to input and/or output information. The information includes at least one of instructions and data. The processor is used to execute a computer program, so that the processing apparatus executes the method executed by the first terminal device, the second terminal device, or the network device in any of the foregoing method embodiments.

An embodiment of the present application also provides a processing device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the processing device executes the first terminal device, the second terminal device, or the first terminal device in any of the above method embodiments. The method performed by the network device.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components . The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), and synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

According to the method provided by the embodiment of the present application, the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code runs on a computer, the computer executes the embodiment shown in FIG. 2 The method executed by the terminal device or the method executed by the network device.

According to the method provided in the embodiments of the present application, the present application also provides a computer-readable storage medium that stores program code. When the program code runs on a computer, the computer executes the program shown in FIG. 2 In the embodiment, the method executed by the first terminal device, the method executed by the second terminal device, or the method executed by the network device.

According to the method provided in the embodiments of the present application, the present application also provides a system, which includes the aforementioned first terminal device and second terminal device and one or more network devices.

The network equipment in each of the above-mentioned device embodiments corresponds completely to the network equipment or terminal equipment in the terminal equipment and method embodiments, and the corresponding modules or units execute the corresponding steps. For example, the communication unit (transceiver) executes the receiving or the terminal equipment in the method embodiments. In the sending step, other steps except sending and receiving can be executed by the processing unit (processor). For the functions of specific units, refer to the corresponding method embodiments. Among them, there may be one or more processors.

In the foregoing embodiment, the terminal device may be used as an example of the receiving device, and the network device may be used as an example of the sending device. But this should not constitute any limitation to this application. For example, the sending device and the receiving device may both be terminal devices and the like. This application does not limit the specific types of sending equipment and receiving equipment.

The terms "component", "module", "system", etc. used in this specification are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, the component may be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program, and/or a computer running on a processor. Through the illustration, both the application running on the computing device and the computing device can be components. One or more components may reside in processes and/or threads of execution, and components may be located on one computer and/or distributed among two or more computers. In addition, these components can be executed from various computer readable media having various data structures stored thereon. The component can be based on, for example, a signal having one or more data packets (e.g. data from two components interacting with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through a signal) Communicate through local and/or remote processes.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for transmitting uplink signals, characterized in that it comprises:

Generate first channel information, where the first channel information is used to indicate the phase of the first downlink channel; the phase of the first downlink channel is obtained based on the measurement of the first downlink channel; the first downlink channel The phase of the row channel is used to determine the first precoding, the first precoding is used to precode the modulation symbols of the first uplink signal, and the modulation symbols include symbols obtained by binary phase shift keying BPSK modulation, or , The symbol obtained by π/2-BPSK modulation;

Sending the first channel information.
The method according to claim 1, characterized in that the phase of the first codeword channel information indicating the first downlink channel in a predefined codewords M 1 corresponding, wherein the M phase one codeword in the range of 0 to 2π average, M 1 is an integer greater than 1.
The method according to claim 1 or 2, wherein the method further comprises:

Receiving indication information of reporting granularity, where the reporting granularity is the frequency domain granularity on which the first channel information is reported.
The method according to any one of claims 1 to 3, wherein the method further comprises:

Receiving first indication information, where the first indication information is used to indicate the first precoding;

Precoding the modulation symbols of the first uplink signal based on the first precoding to obtain a precoded first uplink signal;

Sending the pre-coded first uplink signal through the first uplink channel.
The method of claim 4, wherein the method further comprises:

Receive second indication information, where the second indication information is used to indicate a modulation mode for the first uplink signal, and the modulation mode includes BPSK or π/2-BPSK.
The method according to claim 4, wherein the modulation mode for the first uplink signal is predefined, and the modulation mode includes BPSK or π/2-BPSK.
The method according to claim 5 or 6, wherein the method further comprises:

Receiving third indication information, where the third indication information is used to indicate the phase of the modulation symbol obtained by performing π/2-BPSK on the first uplink signal.
The method according to any one of claims 4 to 7, wherein the method further comprises:

Receiving indication information of precoding granularity, where the precoding granularity is a frequency domain granularity based on precoding the modulation symbol of the first uplink signal.
The method according to claim 8, wherein the precoding granularity is the same as the reporting granularity, and the reporting granularity is the frequency domain granularity on which the first channel information is reported.
The method according to any one of claims 1 to 9, wherein the uplink resources scheduled by the same network device are used for the transmission of the first uplink signal and the second uplink signal, and the phase of the first precoding is It is also related to the phase of the second downlink channel and/or the phase of the second precoding, where the second precoding is used for precoding the modulation symbols of the second uplink signal, and the second downlink channel is Corresponding to the second uplink channel used for transmitting the second uplink signal.
A method for transmitting uplink signals, characterized in that it comprises:

Receiving first channel information, where the first channel information is used to indicate a phase of a first downlink channel, and the phase of the first downlink channel is obtained based on a measurement on the first downlink channel;

The first precoding is determined according to the phase of the first downlink channel, and the first precoding is used to precode the modulation symbols of the first uplink signal, and the modulation symbols include those obtained by binary phase shift keying BPSK modulation The symbol of, or the symbol obtained by π/2-BPSK modulation;

Sending first indication information, where the first indication information is used to indicate the first precoding.
The method of claim 11, wherein the method further comprises:

Sending the indication information of the reporting granularity, where the reporting granularity is the frequency domain granularity on which the first channel information is reported.
The method according to claim 11 or 12, wherein the method further comprises:

Send the indication information of the precoding granularity, where the precoding granularity is the frequency domain granularity based on precoding the modulation symbols.
The method according to claim 13, wherein the precoding granularity is the same as the measurement granularity, and the reporting granularity is the frequency domain granularity on which the first channel information is reported.
The method according to any one of claims 11 to 14, wherein the phase of the first channel is determined based on predefined M 1 codewords; wherein the phase of the M 1 codewords is at 0 Evenly distributed within the range of 2π, M 1 is an integer greater than 1, and the first channel information indicates the code word corresponding to the phase of the first downlink channel among the M 1 code words.
The method according to any one of claims 11 to 15, wherein the method further comprises:

Sending second indication information, where the second indication information is used to indicate a modulation mode for the first uplink signal, and the modulation mode includes BPSK or π/2-BPSK.
The method of claim 16, wherein the method further comprises:

Sending third indication information, where the third indication information is used to indicate the phase of the modulation symbol obtained after π/2-BPSK modulation is performed on the first uplink signal.
The method according to any one of claims 11 to 17, wherein the method further comprises:

Send fourth indication information, where the fourth indication information is used to indicate second precoding, and the second precoding is used to precode the modulation symbols of the second uplink signal; the second precoding and the first The difference between the phase difference of a precoding and the phase difference between the second downlink channel and the first downlink channel is ±π/2, and the second downlink channel is different from the one used to transmit the second uplink signal. Corresponding to the second uplink channel.
The method of claim 18, wherein the method further comprises:

Receiving second channel information, where the second channel information is used to indicate the phase of the second downlink channel.
The method according to claim 18 or 19, wherein the phase of the second precoding is 0 or ±π/2.
The method according to any one of claims 18 to 20, wherein the method further comprises:

Send fifth indication information, where the fifth indication information is used to indicate the phase of the modulation symbol obtained after π/2-BPSK modulation is performed on the second uplink signal.
The method according to any one of claims 18 to 21, wherein the phase of the modulation symbol obtained after the second uplink signal is π/2-BPSK modulated is π/2 with the first uplink signal. -The phases of the modulation symbols obtained after BPSK modulation are the same.
A communication device, characterized in that it comprises:

A processing unit, configured to generate first channel information, where the first channel information is used to indicate the phase of the first downlink channel; the phase of the first downlink channel is obtained based on the measurement of the first downlink channel; The phase of the first downlink channel is used to determine a first precoding, and the first precoding is used to precode a binary phase shift keying modulation symbol of the first uplink signal, and the modulation symbol includes a binary phase shift keying modulation symbol. Symbols obtained by shift keying BPSK modulation, or symbols obtained by π/2-BPSK modulation;

The transceiver unit is configured to send the first channel information.
The apparatus as claimed in claim 23, wherein the phase of the first codeword channel information indicating the first downlink channel in a predefined codewords M 1 corresponding, wherein the M phase one codeword in the range of 0 to 2π average, M 1 is an integer greater than 1.
The apparatus according to claim 23 or 24, wherein the transceiver unit is further configured to receive indication information of reporting granularity, and the reporting granularity is the frequency domain granularity on which the first channel information is reported.
The apparatus according to any one of claims 23 to 25, wherein the transceiver unit is further configured to receive first indication information, and the first indication information is used to indicate the first precoding;

The processing unit is further configured to pre-code modulation symbols of the first uplink signal based on the first pre-coding to obtain a pre-coded first uplink signal;

The transceiving unit is further configured to send the precoded first uplink signal through the first uplink channel.
The apparatus according to claim 26, wherein the transceiver unit is further configured to send the precoded first uplink signal through a first uplink channel.
The apparatus according to claim 27, wherein the modulation mode for the first uplink signal is predefined, and the modulation mode includes BPSK or π/2-BPSK.
The device according to claim 27 or 28, wherein the transceiving unit is further configured to receive third indication information, and the third indication information is used to instruct to perform π/2-BPSK on the first uplink signal. The phase of the modulation symbol obtained afterwards.
The apparatus according to any one of claims 27 to 29, wherein the transceiver unit is further configured to receive indication information of precoding granularity, where the precoding granularity is a modulation symbol of the first uplink signal. The frequency domain granularity based on precoding.
The apparatus according to claim 30, wherein the precoding granularity is the same as the reporting granularity, and the reporting granularity is the frequency domain granularity on which the first channel information is reported.
The apparatus according to any one of claims 23 to 31, wherein the uplink resources scheduled by the same network device are used for the transmission of the first uplink signal and the second uplink signal, and the phase of the first precoding is It is also related to the phase of the second downlink channel and/or the phase of the second precoding, where the second precoding is used for precoding the modulation symbols of the second uplink signal, and the second downlink channel is Corresponding to the second uplink channel used for transmitting the second uplink signal.
The device according to any one of claims 23 to 32, wherein the transceiving unit is a transceiver, and the processing unit is a processor.
The device according to any one of claims 23 to 33, wherein the device is a terminal device.
A communication device, characterized in that it comprises a transceiver unit and a processing unit; wherein,

The transceiver unit is configured to receive first channel information, the first channel information is used to indicate the phase of a first downlink channel, and the phase of the first downlink channel is obtained based on the measurement of the first downlink channel ；

The processing unit is configured to determine a first precoding according to the phase of the first downlink channel, and the first precoding is used to precode a binary phase shift keying modulation symbol of the first uplink signal, and the modulation Symbols include symbols obtained by binary phase shift keying BPSK modulation, or symbols obtained by π/2-BPSK modulation;

The transceiver unit is further configured to send first indication information, where the first indication information is used to indicate the first precoding.
The apparatus according to claim 35, wherein the transceiver unit is further configured to send first indication information, and the first indication information is used to indicate the first precoding.
The device according to claim 35 or 36, wherein the transceiver unit is further configured to send indication information of precoding granularity, and the precoding granularity is the frequency domain granularity based on precoding the modulation symbols.
The apparatus according to claim 37, wherein the precoding granularity is the same as the measurement granularity, and the reporting granularity is a frequency domain granularity based on which the first channel information is reported.
The apparatus according to any one of claims 35 to 38, wherein the phase of the first channel is determined based on predefined M 1 codewords; wherein the phase of the M 1 codewords is at 0 Evenly distributed within the range of 2π, M 1 is an integer greater than 1, and the first channel information indicates the code word corresponding to the phase of the first downlink channel among the M 1 code words.
The apparatus according to any one of claims 35 to 39, wherein the transceiver unit is further configured to send second indication information, and the second indication information is used to indicate modulation of the first uplink signal Mode, the modulation mode includes BPSK or π/2-BPSK.
The apparatus according to claim 40, wherein the transceiver unit is further used to send third indication information, and the third indication information is used to indicate that the first uplink signal is modulated by π/2-BPSK. The phase of the modulation symbol.
The apparatus according to any one of claims 35 to 41, wherein the transceiver unit is further configured to send fourth indication information, and the fourth indication information is used to indicate second precoding, and the second Precoding is used to precode the modulation symbols of the second uplink signal; the phase difference between the second precoding and the first precoding and the phase difference between the second downlink channel and the first downlink channel The difference between is ±π/2, and the second downlink channel corresponds to the second uplink channel used to transmit the second uplink signal.
The apparatus according to claim 42, wherein the transceiver unit is further configured to receive second channel information, and the second channel information is used to indicate the phase of the second downlink channel.
The apparatus according to claim 42 or 43, wherein the phase of the second precoding is 0 or ±π/2.
The apparatus according to any one of claims 42 to 44, wherein the transceiving unit is further configured to send fifth indication information, and the fifth indication information is used to instruct to perform π on the second uplink signal. /2-The phase of the modulation symbol obtained after BPSK modulation.
The apparatus according to any one of claims 42 to 45, wherein the phase of the modulation symbol obtained after the second uplink signal is π/2-BPSK modulated is π/2 with the first uplink signal. -The phases of the modulation symbols obtained after BPSK modulation are the same.
The device according to any one of claims 35 to 46, wherein the processing unit is a processor, and the transceiving unit is a transceiver.
The device according to any one of claims 35 to 47, wherein the device is a network device.
A processing device, characterized by comprising at least one processor configured to execute a computer program stored in a memory, so that the device implements the method according to any one of claims 1 to 10 .
A processing device, characterized by comprising at least one processor configured to execute a computer program stored in a memory, so that the device implements the method according to any one of claims 11 to 22 .
A processing device, characterized in that it comprises:

Communication interface, used to input and/or output information;

The processor is configured to execute a computer program, so that the device implements the method according to any one of claims 1 to 10.
A processing device, characterized in that it comprises:

Communication interface, used to input and/or output information;

The processor is configured to execute a computer program, so that the device implements the method according to any one of claims 11 to 22.
A processing device, characterized in that it comprises:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory, so that the device implements the method according to any one of claims 1 to 10.
A processing device, characterized in that it comprises:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory, so that the device implements the method according to any one of claims 11 to 22.
A computer-readable storage medium, characterized by comprising a computer program, which when the computer program runs on a computer, causes the computer to execute the method according to any one of claims 1 to 10.
A computer-readable storage medium, characterized by comprising a computer program, which when the computer program runs on a computer, causes the computer to execute the method according to any one of claims 11 to 22.
A computer program product, the computer program product comprising a computer program, when the computer program is run on a computer, the computer is caused to execute the method according to any one of claims 1 to 10.
A computer program product, the computer program product comprising a computer program, when the computer program is run on a computer, the computer is caused to execute the method according to any one of claims 11 to 22.