CN114600524A

CN114600524A - Communication method and device

Info

Publication number: CN114600524A
Application number: CN201980101574.9A
Authority: CN
Inventors: 许子杰; 高瑜; 周国华; 彭金磷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2022-06-07
Also published as: WO2021114059A1

Abstract

A communication method and device are used for selecting a consistent reference signal with a network side to adjust a subsequent transmitting and receiving signal when a plurality of reference signals are received. The method comprises the following steps: receiving a plurality of reference signals, the plurality of reference signals comprising a first reference signal and a second reference signal; receiving first information, wherein the first information is used for indicating that an uplink signal and/or a downlink signal has an association relation with the first reference signal; sending the uplink signal and/or receiving the downlink signal; and determining parameters corresponding to the uplink signals and/or parameters corresponding to the downlink signals according to the association relationship.

Description

Communication method and device

Technical Field

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

Background

In the existing communication system, in order to improve the communication quality between a node and a terminal device, the terminal device needs to adjust parameters corresponding to uplink and downlink signals. And the terminal equipment adjusts parameters corresponding to the uplink and downlink signals through the downlink reference signals sent by the nodes. For example, the timing offset and the frequency offset of the downlink reference signal are estimated to perform time-frequency tracking on subsequent uplink and downlink signals. For example, in order to achieve correct reception, the terminal device needs to adjust parameters corresponding to the downlink signal. In general, the terminal device tracks the time-frequency offset of the downlink signal by Tracking Reference Signal (TRS). The terminal equipment adjusts the receiving of the downlink signal by receiving the time frequency offset estimation obtained by the TRS. For another example, in order to achieve correct transmission, the terminal device needs to adjust parameters corresponding to the uplink signal. The terminal equipment adjusts the transmission of the uplink signal by receiving the time-frequency offset estimation obtained by the TRS.

How to improve the accuracy of the terminal device in adjusting the corresponding parameters of the uplink and downlink signals is a problem to be solved.

Disclosure of Invention

The application provides a communication method and a communication device, which aim to realize the consistency of a reference signal which is determined by a node and a terminal and is used for adjusting signal parameters, thereby improving the communication quality between the node and the terminal.

In a first aspect, a communication method is provided, where an execution subject of the method may be a terminal device or a chip, a chip system, or a circuit located in the terminal device, and the method is implemented by: receiving a plurality of reference signals, the plurality of reference signals comprising a first reference signal and a second reference signal; receiving first information, wherein the first information is used for indicating that an uplink signal and/or a downlink signal has an association relation with the first reference signal; sending the uplink signal and/or receiving the downlink signal; and determining parameters corresponding to the uplink signals and/or parameters corresponding to the downlink signals according to the association relationship. By the method, when the terminal receives the multiple reference signals, the first reference signal in the multiple reference signals can be determined to be used as a reference for parameter adjustment corresponding to the uplink and downlink signals according to the first information sent by the network equipment or the node. Therefore, the reference signal used by the terminal equipment for parameter adjustment of the uplink and downlink signals is consistent with the reference signal selected by the node, the parameter adjustment result of the uplink and downlink signals of the terminal equipment is synchronous with the node, the accuracy of the terminal equipment for parameter adjustment corresponding to the uplink and downlink signals is improved, and the communication quality between the node and the terminal equipment is improved.

In one possible design, the parameter corresponding to the uplink signal includes a carrier frequency point, and the uplink signal is sent on the carrier frequency point of the first reference signal. Therefore, when a plurality of reference signals are received, the terminal equipment can determine to send the uplink signal on the carrier frequency point according to the first information of the first node, so that the terminal can be aligned with the frequency of the first node, and the accuracy of the terminal equipment in adjusting the carrier frequency point of the uplink signal is improved.

In one possible design, the parameter corresponding to the downlink signal includes a carrier frequency point, and the downlink signal is received at the carrier frequency point of the first reference signal. Therefore, when a plurality of reference signals are received, the terminal equipment can determine to receive the downlink signal according to the carrier frequency point of the first reference signal according to the first information of the first node, so that the terminal can be aligned with the frequency of the first node, and the accuracy of the terminal equipment in adjusting the carrier frequency point of the downlink signal is improved.

In one possible design, the parameter corresponding to the uplink signal includes a doppler shift, and the uplink signal is transmitted on the basis of frequency alignment according to the doppler shift. Therefore, when a plurality of reference signals are received, the terminal equipment can determine the carrier frequency for sending the uplink signal according to the first information of the first node and the Doppler frequency shift of the first reference signal, so that the terminal can be aligned with the frequency of the first node, and the accuracy of the terminal equipment in adjusting the carrier frequency point of the uplink signal is improved.

In one possible design, the parameter corresponding to the downlink signal includes a doppler shift, and the downlink signal is received on the basis of frequency alignment according to the doppler shift. Therefore, when a plurality of reference signals are received, the terminal equipment can determine the carrier frequency of the received downlink signal according to the first information of the first node and the Doppler frequency shift of the first reference signal, so that the terminal can be aligned with the frequency of the first node, and the accuracy of the terminal equipment in adjusting the carrier frequency point of the downlink signal is improved.

In one possible design, the parameter corresponding to the uplink signal includes a time synchronization reference, and the uplink signal is transmitted based on time synchronization according to the time synchronization reference of the first reference signal. Therefore, when receiving the plurality of reference signals, the terminal device can perform time synchronization according to the first information of the first node and the time synchronization reference of the first reference signal, and send the uplink signal, so that the terminal can be aligned with the time of the first node, and the accuracy of the terminal device in adjusting the time of the uplink signal is improved.

In one possible design, the parameter corresponding to the downlink signal includes a time synchronization reference, and the downlink signal is received on the basis of time synchronization according to the time synchronization reference of the first reference signal. Therefore, when receiving a plurality of reference signals, the terminal device can perform time synchronization according to the first information of the first node and the time synchronization reference of the first reference signal, and receive the downlink signal, so that the terminal can be aligned with the time of the first node, and the accuracy of the terminal device in time adjustment of the downlink signal is improved.

In one possible design, the method further includes: receiving configuration information, wherein the configuration information is used for indicating parameters of the first reference signal. So that the terminal can receive the first reference signal according to the configuration information. Alternatively, the terminal may receive configuration information sent by a plurality of nodes respectively. The terminal device receives a plurality of reference signals from a plurality of nodes according to the configuration information.

In a second aspect, a communication method is provided, where an execution subject of the method may be a node or a network device, and may also be a chip, a chip system, or a circuit in the node or the network device. The method is realized by the following steps: transmitting a plurality of reference signals to a terminal, the plurality of reference signals including a first reference signal and a second reference signal; and sending first information to the terminal, wherein the first information is used for indicating that the uplink signal and/or the downlink signal have an association relation with the first reference signal. By the method, the terminal equipment can be instructed to use the first reference signal to adjust the parameters of the uplink and downlink signals by sending the first information to the terminal equipment, so that the parameter adjustment result of the uplink and downlink signals of the terminal equipment is kept synchronous with the node, the accuracy of the terminal equipment in adjusting the corresponding parameters of the uplink and downlink signals is improved, and the communication quality between the node and the terminal equipment is improved.

In one possible design, the method further includes: and sending configuration information to the terminal, wherein the configuration information is used for indicating the parameters of the first reference signal. For example, the first node sends configuration information indicating parameters of the first reference signal to the terminal, and the terminal may receive the first reference signal according to the configuration information of the first node. Optionally, a plurality of nodes may respectively send configuration information to the terminal, so that the terminal receives the reference signal from each node according to the plurality of configuration information.

In combination with the methods provided in the first and second aspects, several possible designs are given below.

In one possible design, the association includes: the parameter corresponding to the uplink signal and/or the parameter corresponding to the downlink signal have a corresponding relationship with at least one of the following parameters of the first reference signal: a carrier frequency point, a doppler shift, a carrier frequency point synchronization reference, a time synchronization reference, or a time timing reference. For example, the corresponding relationship is that the parameter corresponding to the uplink signal and/or the parameter corresponding to the downlink signal is the same as at least one of the following parameters of the first reference signal.

The first information may indicate the association by way of display or implicit, and several possible implementations are provided below.

In one possible design, the first information may include quasi co-located QCL information indicating that the uplink signal and/or the downlink signal have a QCL relationship with the first reference signal.

In one possible design, the first information includes a transmission configuration indication TCI status, and the TCI status is a TCI status of the uplink signal and/or the downlink signal and has a corresponding relationship with a TCI status of the first reference signal. For example, the corresponding relationship is that the TCI state of the up signal and/or the down signal is the same as the TCI state of the first reference signal.

In one possible design, the first information may include an identification of the first reference signal and/or the first information may include an identification of a resource used to receive the first reference signal.

The first information may be transmitted through higher layer signaling. The higher layer signaling includes RRC signaling, MAC CE, or DCI.

In one possible design, the uplink signal may include any one or more of: uplink reference signals, signals carried in an uplink shared channel, signals carried in an access channel, or signals carried in an uplink control channel.

In one possible design, the downlink signal includes any one or more of: a downlink reference signal, a signal carried in a downlink shared channel, a signal carried in a downlink control channel, or a signal in a broadcast channel.

In one possible design, the first reference signal and the second reference signal belong to different cells, the first reference signal belongs to a primary cell, and the second reference signal belongs to a secondary cell.

In a third aspect, a communication method is provided, which is implemented by: the method comprises the steps that terminal equipment receives first configuration information and second configuration information, wherein the first configuration information is used for configuring at least two sets of downlink reference signals; the second configuration information is used for configuring at least one set of uplink reference signals; the terminal equipment receives first indication information, wherein the first indication information is used for indicating the incidence relation between at least one set of downlink reference signals and at least one set of uplink reference signals; and the terminal equipment determines that the at least one set of downlink reference signals corresponding to the at least one set of uplink reference signals have an association relation according to the first indication information. By the above method, when the terminal receives the multiple reference signals, it can determine which reference signals of the multiple reference signals are used as references for parameter adjustment corresponding to the uplink reference signal according to the first indication information. The method and the device enable the parameter adjustment result of the uplink reference signal of the terminal device to be synchronous with the node, improve the accuracy of the terminal device in adjusting the corresponding parameter of the uplink reference signal, and improve the communication quality between the node and the terminal device.

In one possible design, the association relationship may be a quasi co-located QCL relationship.

In one possible design, the association is used to determine an association between at least one parameter corresponding to the at least one set of uplink reference signals and at least one parameter corresponding to the at least one set of downlink reference signals, where the at least one parameter includes at least one of the following parameters: carrier frequency point, doppler shift, carrier frequency point synchronization reference, time timing reference.

In one possible design, the terminal device determines the at least one parameter used for transmitting the at least one set of uplink reference signals or uplink data channels or uplink control channels or uplink shared access channels according to the QCL relationship indicated by the first indication information.

In one possible design, the first configuration information may be one or more of physical layer signaling and/or higher layer signaling; the second configuration information may be one or more physical layer signaling and/or higher layer signaling; the first indication information may be one or more physical layer signaling and/or MAC CE signaling and/or higher layer signaling.

In one possible design, the QCL relationship may be defined as QCL type E, configured through higher layer RRC signaling.

In a fourth aspect, a communication method is provided, which is implemented by: the method comprises the steps that terminal equipment receives first configuration information, wherein the first configuration information is used for configuring a plurality of sets of downlink reference signals; and the terminal equipment receives first indication information, wherein the first indication information is used for indicating the terminal equipment, and the at least one parameter is determined to be used for the terminal equipment to receive downlink transmission according to at least one set of downlink reference signals in the plurality of sets of downlink reference signals. By the above method, when the terminal receives the multiple reference signals, it may determine to use one of the multiple reference signals as a reference for parameter adjustment corresponding to the downlink signal according to the first indication information. Therefore, the parameter adjustment result of the downlink signal of the terminal equipment is kept synchronous with the node, the accuracy of the terminal equipment in adjusting the corresponding parameter of the downlink signal is improved, and the communication quality between the node and the terminal equipment is improved.

In one possible design, the at least one parameter includes at least one of a carrier frequency point, a doppler shift, a carrier frequency point synchronization reference, a time synchronization reference, and a time timing reference.

In one possible design, the downlink transmission includes at least one of a downlink reference signal, a downlink data channel, a downlink synchronization channel, and a downlink control channel.

In a fifth aspect, embodiments of the present application provide a communication apparatus, which includes a communication interface and a processor, where the communication interface is used for the apparatus to communicate with other devices, for example, to receive and transmit data or signals. Illustratively, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be a network device or node. The processor is configured to invoke a set of programs, instructions or data to perform the methods described in the first, third or fourth aspects above. The apparatus may also include a memory for storing programs, instructions or data called by the processor. The memory is coupled to the processor, and the processor, when executing instructions or data stored in the memory, may implement the method described in the first, third or fourth aspect.

In a sixth aspect, embodiments of the present application provide a communication apparatus, which includes a communication interface and a processor, where the communication interface is used for the apparatus to communicate with other devices, for example, to receive and transmit data or signals. Illustratively, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be a terminal device. The processor is arranged to call a set of programs, instructions or data to perform the method described in the second aspect above. The apparatus may also include a memory for storing programs, instructions or data called by the processor. The memory is coupled to the processor, and the processor, when executing instructions or data stored in the memory, may implement the method described in the second aspect above.

In a seventh aspect, this application further provides a computer-readable storage medium, which stores computer-readable instructions that, when executed on a computer, cause the computer to perform the method as set forth in the first aspect, the third aspect, the fourth aspect, or any possible design of these aspects.

In an eighth aspect, embodiments of the present application further provide a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method as set forth in the second aspect or any one of the possible designs of the second aspect.

In a ninth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method described in the first aspect, the third aspect, the fourth aspect, or any one of these possible designs. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a tenth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method described in the second aspect or any one of the possible designs of the second aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In an eleventh aspect, an embodiment of the present application provides a communication system, where the system includes a terminal device and a node, where the terminal device is configured to perform the method described in the first aspect, the third aspect, the fourth aspect, or any possible design of these aspects; the node is configured to perform the method of the second aspect or any one of the possible designs of the second aspect.

In a twelfth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method described in the aspects and any possible design of aspects.

Drawings

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

fig. 1b is a schematic diagram of an SFN architecture of a 4G communication system in the embodiment of the present application;

fig. 1c is a schematic diagram of a Hyper Cell architecture of a 4G communication system in the embodiment of the present application;

FIG. 2 is a schematic diagram of a time-frequency offset tracking method in LTE according to an embodiment of the present application;

FIG. 3 is a diagram illustrating a method for tracking time-frequency offset in NR according to an embodiment of the present disclosure;

FIG. 4 is a flowchart illustrating a communication method according to an embodiment of the present application;

FIG. 5 is a second flowchart of a communication method according to an embodiment of the present application;

FIG. 6 is a third flowchart illustrating a communication method according to an embodiment of the present application;

FIG. 7 is a fourth flowchart illustrating a communication method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a communication device in an embodiment of the present application;

fig. 9 is a second schematic structural diagram of a communication device in the embodiment of the present application.

Detailed Description

The embodiment of the application provides a communication method and a communication device, wherein the method and the device are based on the same or similar conception of the same technology, and because the principles of solving the problems of the method and the device are similar, the device and the method can be mutually implemented, and repeated parts are not described again. In the embodiments of the present application, "at least one" means one or more. "plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that three relationships may exist. For example, a and/or B, may represent: a is present alone, A and B are present simultaneously, and B is present alone. A, B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a, b and c. Where each of a, b, c may itself be an element or a collection of one or more elements.

In this application, "exemplary," "in some embodiments," "in other embodiments," and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term using examples is intended to present concepts in a concrete fashion.

In the present application, "of" and "corresponding" may sometimes be used in combination. It should be noted that the intended meaning is consistent when differences are not emphasized. In the embodiments of the present application, communication and transmission may be mixed sometimes, and it should be noted that the expressed meanings are consistent in a non-emphasized manner. For example, a transmission may include a transmission and/or a reception, may be a noun, and may be a verb.

It should be noted that the terms "first," "second," and the like in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or order.

The communication method provided by the embodiment of the application can be applied to a fourth generation (4th generation, 4G) communication system, such as a Long Term Evolution (LTE) system; a fifth generation (5G) communication system, such as a 5G New Radio (NR) system; or to various future communication systems.

Optionally, the embodiment of the application may be applied to a communication scenario with high-speed movement, for example, a high-speed rail scenario.

Fig. 1a shows an architecture of a possible communication system to which the communication method provided by the embodiment of the present application is applicable, and the communication system may include one or more network devices 110 and one or more terminal devices 120. Wherein:

the network device 110 is a node in a Radio Access Network (RAN), which may also be referred to as a base station, an access network device, or a node, which may also be referred to as a RAN node (or device). Currently, some examples of nodes 101 are: next generation base station (next generation nodeB, gNB), next generation evolved Node B (next generation evolved Node B, Ng-eNB), Transmission Reception Point (TRP), evolved Node B (evolved Node B, eNB), Radio Network Controller (RNC), Node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (e.g., home evolved Node B, or home Node B, HNB), base band unit (base unit, BBU), or wireless fidelity (Wifi) access point (access point, AP), or a device in a 5G communication system, or a network device in a future possible communication system. The network device 110 may also be a device that serves a base station function in device to device (D2D) communication. In the embodiment of the present application, when the network device 110 communicates with the terminal device, the number of the network devices may be one or more, and may belong to the same cell or belong to different cells.

The terminal device 120, which may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like, is a device that provides voice or data connectivity to a user, and may also be an internet of things device. For example, the terminal device 120 includes a handheld device, an in-vehicle device, and the like having a wireless connection function. Currently, the terminal device 120 may be: mobile phone (mobile phone), tablet computer, notebook computer, palm computer, Mobile Internet Device (MID), wearable device (e.g. smart watch, smart bracelet, pedometer, etc.), vehicle-mounted device (e.g. car, bicycle, electric car, airplane, ship, train, high-speed rail, etc.), Virtual Reality (VR) device, Augmented Reality (AR) device, wireless terminal in industrial control (industrial control), smart home device (e.g. refrigerator, television, air conditioner, electric meter, etc.), smart robot, workshop device, wireless terminal in self drive (driving), wireless terminal in remote surgery (remote medical supply), wireless terminal in smart grid (smart grid), wireless terminal in transportation safety (transportation safety), wireless terminal in smart city (city), or a wireless terminal in a smart home (smart home), a flying device (e.g., a smart robot, a hot air balloon, a drone, an airplane), etc. Terminal 120 may also be a device in D2D communication that serves the function of a terminal. The present application is described in terms of a terminal.

The terminal of the embodiment of the application can move at a high speed. It should be noted that the high speed in the embodiment of the present application may be understood as the moving speed not less than a certain threshold. For example, the threshold may be 100 m/s, 120 m/s, 350km/h to 500km/h, etc., may be predefined through a communication protocol, or may be determined by the terminal according to a preset algorithm or rule, which is not limited thereto. For example, the terminal of the high-speed mobile scene may be an Unmanned Aerial Vehicle (UAV) flying in the air, an airborne terminal, an airplane, a high-speed rail, a vehicle-mounted terminal, and the like. In particular, a UAV may be understood to be an aircraft that is maneuvered using radio remote control or self-contained programming.

The embodiment of the application is suitable for a single or multiple Transmission Reception Point (TRP) scene and any one derived scene thereof. In a scenario of multiple TRPs, multiple TRPs may be connected to the same baseband unit (BBU) or different BBUs. Here, a plurality of TRPs may belong to the same cell or may belong to different cells.

In some application scenarios, such as high-speed mobile communication scenarios, a terminal device may communicate with multiple nodes. For example, in a multiple transmission reception point (Multi-TRP) scenario, a terminal device may communicate with a plurality of TRPs. For example, the Multi-TRP is implemented in a single frequency network cell (SFN cell) in 4G, and is implemented in a super cell (super cell) in 5G.

As shown in fig. 1b, the SFN in 4G is that in a geographic area, a plurality of pico remote radio units (prrus) operating in the same frequency band are combined to form the same cell, and have the same Physical Cell Identity (PCI), where the number of channels and the number of antennas of the pRRU are the same. The SFN adopts a joint scheduling mode, and improves the capacity by 45-50% compared with a common cell by reducing the interference of an overlapping area and reducing the switching times. In the framework of SFN, BBU can implement the functions of layer 3 and layer 2, TRP implements the function of pRRU. And the BBU carries out data scheduling and processing, and carries out uplink and downlink signal transmission with other equipment through the pRRU.

As shown in fig. 1c, the Hyper Cell in 5G is a key technology in a 5G high-speed networking scenario (high-speed rail and high-speed), a traffic channel is independent among all TRPs, each TRP can be scheduled independently, and the capacity is equal to the sum of multiple TRPs. Frequent switching can be reduced, and the user experience of a high-speed scene is improved. Compared with the SFN technology of LTE, the method not only realizes the extension of the coverage area, but also increases the system capacity. Supporting data transmission on different layers. In the Hyper Cell architecture, the BBU can realize the functions of layer 3 and layer 2, and the layer 2 scheduling can be realized by a scheduling co-processing module. TRP fulfills the function of pRRU. And the BBU carries out data scheduling and processing, and carries out uplink and downlink signal transmission with other equipment through the pRRU.

The high-speed rail scene is taken as an example to introduce possible characteristics of a communication scene moving at a high speed. 1) In a high-speed railway scene, the movement speed of the train is very high, and can reach 350km/h to 500km/h generally, so that a terminal moving at a high speed has a higher movement speed. 2) The doppler shift is large in a high-speed moving scene. For example, when the carrier frequency is 3.5 GHz: the maximum Doppler shift is 1.1KHz at a rate of 350km/h and 1.6KHz at a rate of 500 km/h. 3) The number of terminal devices in a high-speed rail scene is large. The high-speed train is usually composed of 8 or 16 cars, and can carry 500 to 1000 passengers generally, so that the number of terminal devices can be 500 to 1000. 4) During high-speed rail operation, terminal devices on the train may need to communicate with multiple adjacent TRPs.

In the embodiment of the application, the network device sends a reference signal to the terminal device, and the reference signal is used for adjusting parameters corresponding to the uplink and downlink signals. To achieve proper signal transmission and reception.

To facilitate an understanding of the method of embodiments of the present application, the following concepts of several terms are presented.

1. Quasi-co-location (QCL) concept. QCL is used to indicate that there are one or more identical or similar communication characteristics between multiple resources. The same or similar communication configurations may be employed for multiple resources having QCL relationships. For example, if there is a QCL relationship between two antenna ports, the large scale characteristics of the channel over which one port transmits a symbol can be inferred from the large scale characteristics of the channel over which the other port transmits a symbol. The large scale characteristics may include at least one of the following characteristics: delay spread (delay spread), average delay (average delay), doppler spread (doppler spread), doppler shift (doppler shift), average gain, reception parameters, terminal device reception beam number, transmission/reception channel correlation, reception angle of arrival, spatial correlation of receiver antennas, main-of-arrival (AoA), average angle of arrival, spreading of AoA, and the like. As another example, two signals have a QCL relationship, then the antenna ports transmitting the two signals have a QCL relationship between them.

In the embodiment of the present application, the two signals QCL may mean that the two signals have a QCL relationship, or that the two signals satisfy the QCL relationship.

2. The QCL type (type) includes a plurality of types, such as type a (type-a), type B (type-B), type C (type-C), or type D (type-D).

Alternatively, several of the above types of QCLs can be understood as follows.

the type-a means that four parameters of average delay, doppler shift, delay spread and doppler spread of two signals have QCL relationship at a receiving end, or time-frequency shift of two signals has corresponding relationship when receiving.

type-B means that the two parameters of doppler shift and doppler spread appear to the receiving end as two signals having a QCL relationship.

type-C means that the two parameters, average delay and doppler shift, appear to the receiving end as two signals have a QCL relationship.

type-D means that the spatial Rx parameter (QCL) relationship appears to the receiving end for both signals.

3. A TRS, which may be a TRS when the CSI-RS resource set (CSI-RS resource set) includes a TRS-Info field for indicating that the CSI-RS resource set is for the TRS.

4. Frequency offset, i.e., frequency offset. The frequency offset includes Carrier Frequency Offset (CFO) caused by a deviation of a local oscillator carrier frequency of the transceiving end and Doppler Shift (Doppler Shift) caused by relative motion of the transceiving end. In a high-speed moving scenario, the main component of the frequency offset is the doppler shift.

When a terminal device moves in a certain direction at a constant speed, phase and frequency changes are caused due to propagation path differences, and the changes are generally called doppler shifts. Alternatively, the difference between the transmitted and received frequencies due to the doppler effect is referred to as the doppler shift. It reveals the law that the wave properties change during motion.

5. The parameter corresponding to the uplink signal is a parameter used for transmitting the uplink signal, and the parameter corresponding to the downlink signal is a parameter used for receiving the downlink signal. The parameters corresponding to the uplink signal and/or the parameters corresponding to the downlink signal may include one or more of the following: carrier frequency point, doppler shift, carrier frequency point synchronization reference, time timing reference, average delay, delay spread, doppler spread, or airspace receive parameters.

6. The reference signal may include a cell-specific reference signal (CRS), or a Tracking Reference Signal (TRS).

When the network device sends the reference signal to the terminal, the terminal may adjust the receiving parameter of the downlink signal according to the reference signal. In the following, two possible implementations are illustrated by fig. 2 and 3.

In one possible implementation, as shown in fig. 2, the CRS in the LTE system may be used for downlink time-frequency tracking, that is, the terminal device may determine the downlink timing offset and the frequency offset according to parameters of the CRS. The details are as follows.

S201, the eNB periodically transmits a cell synchronization signal, which includes a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

And S202, the terminal equipment carries out downlink frequency synchronization after receiving the PSS/SSS.

S203, the terminal equipment receives the CRS sent by the eNB.

S204, the terminal equipment carries out synchronization on the estimation of the downlink timing and/or the frequency offset.

S205, the terminal device sends uplink data and demodulation reference signals (DMRSs) on a Physical Uplink Shared Channel (PUSCH) on the tracked carrier frequency.

S206, the eNB carries out timing and frequency offset estimation compensation through the received DMRS.

In one possible implementation, as shown in fig. 3, the TRS in the NR system may be used for downlink time-frequency tracking to achieve correct signal transmission and reception.

S301, the gNB periodically transmits a cell synchronization signal SSB.

And S302, after receiving the SSB, the terminal equipment performs downlink frequency synchronization.

And S303, the terminal equipment receives the TRS sent by the gNB.

S304, the terminal equipment carries out synchronization on the estimation of the downlink timing and the frequency offset.

S305, the terminal device sends uplink data and demodulation reference signal (DMRS) on the PUSCH on the tracked carrier frequency.

S306, the gNB performs timing and frequency offset estimation compensation through the received DMRS.

In the embodiment of the application, the terminal device communicates with the network device, and the network device can also send a plurality of reference signals to the terminal device. For example, a network device may include one or more nodes. For example, the architecture of a network device includes BBUs and nodes, which may be TRPs. The architecture of a network device in a single TRP transmission scenario includes a BBU and one TRP. In a multiple TRP scenario, the architecture of the network device may include a BBU and multiple TRPs. The TRP serves as a transmission receiving point, and signals transmitted by the network device to the terminal and/or signals received from the terminal can be transmitted through the TRP. As another example, the plurality of network devices includes a plurality of nodes. Regardless of the number of network devices, there may be scenarios where multiple reference signals are received by the terminal device. The multiple reference signals received by the terminal device may be from one or more network devices or from one or more nodes. The embodiments of the present application are described with reference to a plurality of nodes as an example.

The plurality of nodes transmit a plurality of reference signals to the terminal device. In particular, the terminal device may communicate with a plurality of nodes. Each of the plurality of nodes may transmit a reference signal to the terminal device. The purpose of the reference signal is that the terminal device may adjust the parameter corresponding to the uplink signal according to the reference signal, and may also adjust the parameter corresponding to the downlink signal. When a terminal device receives a plurality of reference signals transmitted by a plurality of nodes, parameters of a transmission/reception signal need to be adjusted based on one of the reference signals. One or more nodes sending the reference signals also need to know which reference signal the terminal device adjusts the parameters according to. Therefore, the terminal equipment and the network equipment can reach the same, the receiving and sending alignment is ensured, and the data reliability is improved. The communication method provided by the embodiment of the application can achieve the purpose.

The plurality of nodes in communication with the terminal device includes a first node and at least one second node. The reference signal sent by the first node to the terminal device may be regarded as a first reference signal, and the reference signal sent by the second node to the terminal device may be regarded as a second reference signal. And the first node transmits the estimated frequency offset result to the second node, so that the second node can better communicate with the terminal.

As shown in fig. 4, a flow of the communication method provided in the embodiment of the present application is as follows.

S401, the network equipment sends a plurality of reference signals to the terminal equipment.

Correspondingly, the terminal equipment receives a plurality of reference signals.

The network device may include one or more network devices, and may belong to the same cell or different cells. When a network device includes a plurality of network devices, the term "network device" herein is a generic concept.

The network device may transmit the plurality of reference signals to the terminal device through one or more nodes.

The plurality of reference signals may include a first reference signal and a second reference signal. For example, the first reference signal is from a first node and the second reference signal is from a second node.

S402, the network equipment sends first information to the terminal equipment.

Correspondingly, the terminal equipment receives the first information.

The network device may send the first information to the terminal through the first node.

The first information is used for indicating that the uplink signal and the first reference signal have an association relation. The first information may also be used to indicate that the downlink signal has an association with the first reference signal. As an implementation manner, the uplink signal may be a signal to be sent to the first node by the terminal device; the downlink signal may be a signal to be transmitted to the terminal device by the first node.

The association may be a mapping. The association relationship may also refer to a QCL relationship.

The uplink signal and the first reference signal have an association relationship, which may also be understood as that a parameter corresponding to the uplink signal and a parameter of the first reference signal have an association relationship, and as an implementation manner, the parameter corresponding to the uplink signal is determined according to the parameter of the first reference signal. For example, the parameters corresponding to the uplink signal are the same as the parameters of the first reference signal.

Similarly, the downlink signal and the first reference signal have an association relationship, which may also be understood as that a parameter corresponding to the downlink signal and a parameter of the first reference signal have an association relationship. As an implementation manner, the parameter corresponding to the downlink signal is determined according to the parameter of the first reference signal. For example, the parameters corresponding to the downlink signal are the same as the parameters of the first reference signal.

And S403, the terminal equipment sends the uplink signal and/or receives the downlink signal according to the association relation indicated by the first information.

The parameters corresponding to the uplink signals and/or the parameters corresponding to the downlink signals are determined according to the association relationship in the first information.

And/or the terminal equipment adjusts the parameter corresponding to the received downlink signal according to the parameter corresponding to the first reference signal so as to receive the downlink signal.

Here, the object of the terminal device for sending the uplink signal may include the first node and/or the second node; the terminal device may receive a downlink signal from the first node and/or the second node.

For example, the first information is used to indicate that the uplink signal sent by the terminal device is the same as the carrier frequency point of the first reference signal. And the terminal equipment sends the uplink signal on the same carrier frequency point as the first reference signal according to the first information.

For example, the first information is used to instruct the terminal device to receive the downlink signal with the same carrier frequency point as the first reference signal. And the terminal equipment receives the downlink signal on the same carrier frequency point as the first reference signal according to the first information.

For another example, the first information is used to indicate that the uplink signal transmitted by the terminal device has an association relationship with the time synchronization reference of the first reference signal. And the terminal equipment carries out time synchronization according to the time synchronization reference of the first reference signal according to the first information, and sends an uplink signal or receives a downlink signal on the basis of carrying out time synchronization according to the time synchronization reference of the first reference signal.

When the terminal device receives the multiple reference signals, the terminal device may determine to use a first reference signal of the multiple reference signals as a reference for parameter adjustment corresponding to the uplink and downlink signals according to the first information sent by the network device or the node. Therefore, the network side and the terminal equipment can determine the same reference signal in a plurality of reference signals, so that the uplink and downlink transmission parameters are consistent, and the transmission reliability is improved.

Optionally, before S401, S400 may be further included.

S400, the network equipment sends configuration information to the terminal equipment, and the configuration information is used for indicating parameters of the reference signals.

In a possible implementation manner, a first node sends first configuration information to a terminal device, where the first configuration information is used to indicate a parameter corresponding to a first reference signal.

In a possible implementation manner, the second node may also send second configuration information to the terminal device, where the second configuration information is used to indicate a parameter of the second reference signal.

In one possible implementation, the terminal device receives the reference signals from one or more nodes according to the configuration information respectively sent by the plurality of nodes.

And the terminal equipment receives the reference signals from the nodes according to the configuration information sent by the nodes respectively.

Optionally, the network device may further send resource configuration of the uplink and downlink signals to the terminal device. For example, the network device transmits the configuration information of the SRS to the terminal device. For example, the network device may send the resource configuration of the uplink and downlink signal through one or more nodes.

The uplink signal in the embodiment of the present application may include any one or more of the following:

uplink reference signals, such as a channel Sounding Reference Signal (SRS), a demodulation reference signal (DMRS), and a Phase Tracking Reference Signal (PTRS);

a signal carried in a shared channel, such as a Physical Uplink Shared Channel (PUSCH);

the signal carried in the access channel is, for example, a signal carried in a Physical Random Access Channel (PRACH).

The signal carried in the uplink control channel is, for example, a signal carried in a Physical Uplink Control Channel (PUCCH).

The downlink signal in the embodiment of the present application may include any one or more of the following:

the downlink reference signal may be, for example, a Tracking Reference Signal (TRS), a channel state information-reference signal (CSI-RS), a demodulation reference signal (DMRS), or a Phase Tracking Reference Signal (PTRS).

The signal carried in the downlink shared channel is, for example, a signal carried in a Physical Downlink Shared Channel (PDSCH).

The signal carried in the downlink control channel is, for example, a signal carried in a physical downlink control signal (PDCCH).

A signal carried in a broadcast channel, for example, a signal carried in a Physical Broadcast Channel (PBCH).

The following develops several possible implementations of the first information in the embodiments of the present application.

The first information is information which is sent by the network equipment to the terminal equipment and used for indicating that the uplink signal and/or the downlink signal have an association relation with the first reference signal. For example, the first information may be carried in one or more of the following signaling: radio Resource Control (RRC) signaling, MAC control element (MAC CE), or Downlink Control Information (DCI).

For example, the first information may include or indicate an identifier of the first reference signal, which may be an index number (index). It is assumed that multiple reference signals transmitted by multiple nodes are distinguished by multiple index numbers. The index number of the first reference signal is carried in the high-level signal, and may be used to indicate that the uplink signal and/or the downlink signal have an association relationship with the first reference signal corresponding to the index number.

For another example, the first information may include or indicate a status of a Transmission Configuration Index (TCI). The TCI state is a TCI state of the upstream signal and/or the downstream signal, and it can be determined that the TCI state has an association relationship (e.g., is the same) with the TCI state of the first reference signal. When the network equipment configures a plurality of TCIs for the terminal equipment through any one node, one TCI is activated at the same time. The TCI included or indicated by the first information is the activated TCI. The terminal device may select the first reference signal corresponding to the activated TCI as a reference signal having an association relationship with the uplink signal and/or the downlink signal. Or the terminal equipment sends the uplink signal and/or receives the downlink signal according to the activated TCI. Or when the network device configures a plurality of TCIs for the terminal device through any one node, the plurality of TCIs are activated at the same time, the first information indicates one of the TCIs by using a TCI Identifier (ID), and the terminal device may select a first reference signal corresponding to the TCI identifier included in or indicated by the first information as a reference signal having an association relationship with the uplink signal and/or the downlink signal. Or the state of the TCI does not indicate whether the TCI is activated, the first information includes or indicates a TCI identifier, and the terminal device may select the first reference signal corresponding to the TCI identifier included or indicated by the first information as a reference signal having an association relationship with the uplink signal and/or the downlink signal.

Among them, the configuration of the TCI may be realized as follows. The network equipment sends RRC signaling to the terminal equipment, configures TCI related parameters, and sends MAC CE signaling to the terminal equipment for activation, wherein the MAC CE signaling is carried in the PDSCH. And the terminal equipment receives the MAC CE signaling and feeds back a confirmation response. Alternatively, the network device sends DCI to the terminal device to configure the TCI.

For another example, the first information may include or indicate an identification of resources for receiving the first reference signal. If the first reference signal is a TRS, the first information may include or indicate a CSI-RS resource for receiving the TRS. The terminal device may select the TRS received on the resource of the CSI-RS included or indicated by the first information as a reference signal having an association relationship with the uplink signal and/or the downlink signal. Alternatively, the first information may include or indicate an identifier of a resource used for receiving the TRS, and the terminal device may select a reference signal in which the TRS received on the resource of the TRS included or indicated by the first information has an association relationship with the uplink signal and/or the downlink signal.

For another example, the first information may also be QCL information indicating that the uplink signal and/or the downlink signal have a QCL relationship with the first reference signal. The QCL relationship may refer to a QCL relationship in which two signals have one type of type-A, type-B, type-C, type-D.

As an implementation, existing QCL types may be extended. For example, as shown in table 1, a QCL type E (type-E QCL) is newly added. The type-E QCL means that the carrier frequency point and/or Doppler frequency shift of two signals are the same at a receiving end. When the first information indicates that the uplink signal sent by the terminal device has a type-E QCL relationship with the first reference signal, it means that the carrier frequency point of the uplink signal sent by the terminal device is associated with the carrier frequency point and/or the doppler frequency shift of the first signal. Similarly, when the first information indicates that the downlink signal received by the terminal device has a type-E QCL relationship with the first reference signal, it means that the carrier frequency point of the downlink signal received by the terminal device is associated with the carrier frequency point and/or the doppler shift of the first signal.

TABLE 1

Based on the description of the above embodiments, as shown in fig. 5, an embodiment of the present application further provides a communication method.

S501, the network equipment sends a plurality of reference signals to the terminal equipment, and the terminal equipment receives the plurality of reference signals.

This step is the same as S401.

For example, a network device may transmit multiple reference signals to a terminal device through one or more nodes. In one possible implementation, a first node transmits a first reference signal, and a second node transmits a second reference signal.

S502, the terminal device sends second information to the network device, and the network device receives the second information.

For example, the terminal device may send the second information to the first node and/or the second node, which the first node and/or the second node receives.

The second information is used for instructing the terminal equipment to select the first reference signal from the plurality of reference signals to adjust the parameters corresponding to the uplink and downlink signals.

As one implementation, the second information may multiplex a mechanism of ACK/NACK information. For example, the terminal device sends ACK information to the first node, where the ACK information is used to instruct the terminal device to select the first reference signal. And the terminal equipment sends NACK information to the first node, wherein the NACK information is used for indicating the terminal equipment to select the second reference signal. The specific indication content of the ACK/NACK information is not limited in the embodiments of the present application.

The second information may also be sent by higher layer signaling. The explanation of the higher layer signaling refers to the explanation of the higher layer signaling above.

S503, the terminal equipment sends the uplink signal and/or receives the downlink signal according to the second information.

And the terminal equipment determines the parameter corresponding to the first reference signal. Sending an uplink signal according to the parameter corresponding to the first reference signal; and receiving the downlink signal according to the parameter corresponding to the first reference signal.

Specifically, similar to S403, the terminal device adjusts a parameter corresponding to transmitting the uplink signal according to a parameter corresponding to the first reference signal to transmit the uplink signal, and/or the terminal device adjusts a parameter corresponding to receiving the downlink signal according to a parameter corresponding to the first reference signal to receive the downlink signal.

Optionally, S500 is included before S501, and S500 is the same as S400.

Based on the description of the above embodiments, as shown in fig. 6, an embodiment of the present application further provides a communication method.

S601, the plurality of nodes send a plurality of reference signals to the terminal equipment, and the terminal equipment receives the plurality of reference signals.

This step is the same as S401.

For example, a first node sends a first reference signal to a terminal device, and a second node sends a second reference signal to the terminal device. Fig. 6 illustrates a first node and a second node as an example.

S602, the terminal equipment determines parameters corresponding to the first reference signal;

s603, the terminal device sends an uplink signal to the first node and receives a downlink signal from the first node according to the parameter corresponding to the first reference signal.

S604, the terminal device determines the parameter corresponding to the second reference signal.

And S605, the terminal equipment sends an uplink signal to the second node and receives a downlink signal from the second node according to the parameter corresponding to the second reference signal.

The execution order of S602 to S603 and S604 to S605 is not limited, and they may be performed simultaneously or in an alternative order.

Optionally, S600 is included before S601, and S500 is the same as S400.

Based on the description of the above embodiments, as shown in fig. 7, an embodiment of the present application further provides a communication method.

S700, the network equipment sends configuration information to the terminal equipment, and the terminal equipment receives the configuration information.

The configuration information includes mapping relationships between m reference signals and n uplink signals, where m and n are positive integers. The mapping relationship may be that one reference signal may correspond to one uplink signal, and one reference signal may also correspond to multiple uplink signals; one uplink signal may also correspond to multiple reference signals. The correspondence may be represented by a correspondence between resources of the reference signal and resources of the uplink signal. For example, if the reference signal is a TRS and the uplink signal is an SRS, the configuration information includes mapping relationships between m TRS resources (resources) and n SRS resources.

The network device may send configuration information to the terminal device via any one or more of the plurality of nodes.

S701, the terminal equipment sends a first uplink signal to the network equipment.

The corresponding network device receives the first uplink signal.

The first uplink signal and the first reference signal have a corresponding relationship. And the terminal equipment sends the first uplink signal according to the parameter corresponding to the first reference signal. For example, the terminal device sends a first uplink signal on a carrier frequency point for receiving the first reference signal. For another example, the terminal device transmits the first uplink signal after performing time synchronization according to the time synchronization reference of the first reference signal.

S702, the network equipment determines that the terminal equipment uses a first reference signal corresponding to the first uplink signal as an uplink and downlink transmission parameter adjustment reference.

The terminal device uses the first reference signal as an uplink and downlink transmission parameter adjustment reference, that is, the terminal device sends an uplink signal and/or receives a downlink signal according to a parameter corresponding to the first reference signal.

In S702, the network device may determine, according to a first uplink signal resource that receives the uplink signal, a first reference signal resource corresponding to the first uplink signal resource, so as to determine that the terminal device uses the first reference signal on the first reference signal resource as an uplink and downlink transmission parameter adjustment reference.

As shown in the embodiments of fig. 4 to fig. 7, a plurality of nodes send a plurality of reference signals to the terminal device, and a specific network device or terminal selects which reference signal of the plurality of reference signals is used as a reference for subsequent transceiving signals.

In one possible implementation, multiple nodes belong to the same cell. For example, under Multi-TRP scenario, handover is exempted between multiple cells on the same frequency band. The network device may select the reference signal according to a distance between the node and the terminal device. For example, when the terminal device approaches the first node in the moving process, the distance between the first node and the terminal device is smaller than the distance between the second node and the terminal device. The first node sends first information to the terminal equipment, and the terminal equipment is indicated to select the first reference signal.

In another possible implementation, multiple nodes may belong to different cells. For example, in a Multi-TRP scenario, a plurality of nodes collectively provide a service for a terminal device, a first node is a primary node, and a second node is a secondary node. The first information may further include identifications of the primary node and the secondary node. When a plurality of nodes send a plurality of reference signals, the terminal equipment selects the reference signal sent by the main node as a parameter adjustment reference for uplink and downlink transmission.

In another possible implementation manner, for example, in a Multi-TRP scenario, the terminal device identifies which TRP the received DCI is transmitted through an index in a received control resource set (CORESET). The terminal device selects a reference signal corresponding to the TRP as a parameter adjustment reference for uplink and downlink transmission according to which TRP the DCI belongs to, that is, defaults to use a downlink signal corresponding to the TRP for time/frequency synchronization, where the used downlink signal may be ssb (pbch), TRS or CSI-RS.

It should be noted that the examples in the application scenarios in the present application only show some possible implementations, and are for better understanding and description of the method in the present application. The skilled person can derive some examples of the evolution according to the indication methods of the reference signals provided by the application.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of the terminal device, the node, and the interaction between the terminal device and the node. In order to implement the functions in the method provided by the embodiments of the present application, the network device and the terminal may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

As shown in fig. 8, based on the same technical concept, an embodiment of the present application further provides a communication apparatus 800, where the communication apparatus 800 may be a terminal device, a network device, or a node, or an apparatus in the terminal device, the network device, or the node, or an apparatus capable of being used in cooperation with the terminal device, the network device, or the node. In one design, the communication apparatus 800 may include a module corresponding to one to perform the method/operation/step/action performed by the terminal device or the node in the foregoing method embodiment, where the module may be a hardware circuit, or may be software, or may be implemented by combining a hardware circuit and software. In one design, the communications apparatus may include a processing module 801 and a communications module 802. The processing module 801 is used to invoke the communication module 802 to perform the receiving and/or transmitting functions.

When used to perform a method performed by a terminal device:

a communication module 802 configured to receive a plurality of reference signals, the plurality of reference signals including a first reference signal and a second reference signal; the first information is used for indicating that the uplink signal and/or the downlink signal have an association relation with the first reference signal; and for transmitting uplink signals and/or receiving downlink signals; and determining parameters corresponding to the uplink signals and/or parameters corresponding to the downlink signals according to the incidence relation.

The processing module 801 and the communication module 802 may also be configured to perform other corresponding steps or operations performed by the terminal device in the foregoing method embodiments, which are not described in detail herein.

When used to perform a method performed by a network device or node:

a communication module 802, configured to send a plurality of reference signals to a terminal, where the plurality of reference signals include a first reference signal and a second reference signal; and the first information is used for indicating that the uplink signal and/or the downlink signal have an association relation with the first reference signal.

The processing module 801 and the communication module 802 may also be configured to perform other corresponding steps or operations performed by the node in the foregoing method embodiment, which are not described in detail herein.

The division of the modules in the embodiments of the present application is schematic, and is only a logical function division, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist alone physically, or two or more modules are integrated in one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Fig. 9 shows a communication apparatus 900 provided in this embodiment of the present application, which is used to implement the functions of the terminal device or the network device or the node in the foregoing method. When the functions of the network device or node are implemented, the apparatus may be the network device or node, or an apparatus in the network device or node, or an apparatus capable of being used in cooperation with the network device or node. When the functions of the terminal device are implemented, the apparatus may be the terminal device, or an apparatus in the terminal device, or an apparatus capable of being used in cooperation with the terminal device. Wherein the apparatus may be a system-on-a-chip. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The communication apparatus 900 includes at least one processor 920, configured to implement the functions of the terminal device or the network device in the methods provided in the embodiments of the present application. The communications device 900 may also include a communications interface 910. In embodiments of the present application, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface for communicating with other devices over a transmission medium. For example, the communication interface 910 is used for devices in the apparatus 900 to communicate with other devices. When the communication apparatus 900 is a network device, the other device may be a terminal device. When the communication apparatus 900 is a terminal device, the other apparatus may be a network device. The processor 920 utilizes the communication interface 910 to send and receive data and is configured to implement the methods described in the various method embodiments above. Illustratively, when the function of the network device is implemented, the processor 920 is configured to transmit a plurality of reference signals to a terminal by using the communication interface, where the plurality of reference signals includes a first reference signal and a second reference signal, and transmit first information to the terminal, where the first information is used to indicate that an uplink signal and/or a downlink signal has an association relationship with the first reference signal. When the function of the terminal device is implemented, the processor 920 is configured to receive a plurality of reference signals using the communication interface, where the plurality of reference signals includes a first reference signal and a second reference signal; and for receiving, by the communications interface 910, first information indicating that an uplink signal and/or a downlink signal has an association relationship with the first reference signal; and transmitting the upstream signal and/or receiving the downstream signal using the communication interface 910; and determining parameters corresponding to the uplink signals and/or parameters corresponding to the downlink signals according to the association relationship. The processor 920 and the communication interface 910 may also be configured to perform other corresponding steps or operations performed by the terminal device or the node according to the foregoing method embodiments, which are not described herein again.

The apparatus 900 may also include at least one memory 930 for storing program instructions and/or data. A memory 930 is coupled to the processor 920. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 920 may operate in conjunction with the memory 930. Processor 920 may execute program instructions stored in memory 930. At least one of the at least one memory may be included in the processor.

The specific connection medium among the communication interface 910, the processor 920 and the memory 930 is not limited in the embodiments of the present application. In the embodiment of the present application, the memory 930, the processor 920, and the communication interface 910 are connected by a bus 940 in fig. 9, the bus is represented by a thick line in fig. 9, and the connection manner between other components is merely illustrative and is not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 9, but that does not indicate only one bus or one type of bus.

When the apparatus 1200 and the apparatus 900 are specifically chips or chip systems, the output or the reception of the communication module 1202 and the communication interface 910 may be baseband signals. When the apparatus 1200 and the apparatus 900 are embodied as devices, the communication module 1202 and the communication interface 910 may output or receive radio frequency signals. In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory 930 may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

Some or all of the operations and functions performed by the terminal device or some or all of the operations and functions performed by the node described in the above method embodiments of the present application may be implemented by a chip or an integrated circuit.

In order to implement the functions of the communication apparatus described in fig. 8 or fig. 9, an embodiment of the present application further provides a chip, which includes a processor and is configured to support the communication apparatus to implement the functions related to the terminal device or the node in the foregoing method embodiments. In one possible design, the chip is connected to or includes a memory for storing the necessary program instructions and data of the communication device.

The embodiment of the application provides a computer readable storage medium, which stores a computer program, wherein the computer program comprises instructions for executing the method embodiment.

Embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the above-described method embodiments.

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

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

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

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

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

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

Claims

A method of communication, comprising:

receiving a plurality of reference signals, the plurality of reference signals comprising a first reference signal and a second reference signal;

receiving first information, wherein the first information is used for indicating that an uplink signal and/or a downlink signal has an association relation with the first reference signal;

sending the uplink signal and/or receiving the downlink signal; and determining parameters corresponding to the uplink signals and/or parameters corresponding to the downlink signals according to the association relationship.
The method of claim 1, wherein the association relationship comprises: the parameter corresponding to the uplink signal and/or the parameter corresponding to the downlink signal have a corresponding relationship with at least one of the following parameters of the first reference signal:

a carrier frequency point, a doppler shift, a carrier frequency point synchronization reference, a time synchronization reference, or a time timing reference.
The method of claim 1 or 2, wherein the first information comprises quasi co-located QCL information indicating that the uplink signal and/or the downlink signal have a QCL relationship with the first reference signal.
The method of claim 1 or 2, wherein the first information comprises a transmission configuration indicating a state of TCI, the state of TCI being a TCI state of the upstream signal and/or the downstream signal and having a correspondence with a TCI state of the first reference signal.
The method according to claim 1 or 2, wherein the first information comprises an identification of the first reference signal and/or the first information comprises an identification of a resource for receiving the first reference signal.
The method according to any one of claims 2 to 5, wherein the parameters corresponding to the uplink signals and/or the parameters corresponding to the downlink signals comprise carrier frequency points;

the sending the uplink signal and/or receiving the downlink signal includes: and transmitting an uplink signal and/or receiving a downlink signal on the carrier frequency point of the first reference signal.
The method according to any one of claims 2 to 6, wherein the parameter corresponding to the uplink signal and/or the parameter corresponding to the downlink signal comprises a time synchronization reference;

the sending the uplink signal and/or receiving the downlink signal includes:

and on the basis of carrying out time synchronization according to the time synchronization reference of the first reference signal, transmitting the uplink signal and/or receiving the downlink signal.
The method of any one of claims 1 to 7, wherein the uplink signal comprises any one or more of: an uplink reference signal, a signal carried in an uplink shared channel, a signal carried in an access channel, or a signal carried in an uplink control channel;

the downlink signal comprises any one or more of the following: downlink reference signals, signals carried in a downlink shared channel, signals carried in a downlink control channel, or signals in a broadcast channel.
The method of any of claims 1-8, wherein the first reference signal and the second reference signal belong to different cells, the first reference signal belongs to a primary cell, and the second reference signal belongs to a secondary cell.
The method of any one of claims 1 to 9, further comprising:

receiving configuration information, wherein the configuration information is used for indicating parameters of the first reference signal.
A method of communication, comprising:

transmitting a plurality of reference signals to a terminal, the plurality of reference signals including a first reference signal and a second reference signal;

and sending first information to the terminal, wherein the first information is used for indicating that the uplink signal and/or the downlink signal have an association relation with the first reference signal.
The method of claim 11, wherein the association relationship comprises: the parameter corresponding to the uplink signal and/or the parameter corresponding to the downlink signal have a corresponding relationship with at least one of the following parameters of the first reference signal:

a carrier frequency point, a doppler shift, a carrier frequency point synchronization reference, a time synchronization reference, or a time timing reference.
The method of claim 11 or 12, wherein the first information comprises quasi co-located QCL information indicating that the uplink signal and/or the downlink signal have a QCL relationship with the first reference signal.
The method according to claim 11 or 12, wherein the first information comprises a transmission configuration indicating a state of TCI, the state of TCI being a TCI state of the upstream signal and/or the downstream signal and having a correspondence with a TCI state of the first reference signal.
The method according to claim 11 or 12, wherein the first information comprises an identification of the first reference signal and/or the first information comprises an identification of a resource for receiving the first reference signal.
The method according to any one of claims 11 to 15, wherein the upstream signal comprises any one or more of: an uplink reference signal, a signal carried in an uplink shared channel, a signal carried in an access channel, or a signal carried in an uplink control channel;

the downlink signal comprises any one or more of the following: a downlink reference signal, a signal carried in a downlink shared channel, a signal carried in a downlink control channel, or a signal in a broadcast channel.
The method of any of claims 11 to 16, wherein the first reference signal and the second reference signal belong to different cells, the first reference signal belongs to a primary cell, and the second reference signal belongs to a secondary cell
The method of any one of claims 11 to 17, further comprising:

and sending configuration information to the terminal, wherein the configuration information is used for indicating the parameters of the first reference signal.
A communication device comprising a processor and a communication interface for communicating with other communication devices; the processor is configured to run a set of programs to cause the communication device to implement the method of any one of claims 1 to 10.
A communication device comprising a processor and a communication interface for communicating with other communication devices; the processor is configured to run a set of programs to cause the communication device to implement the method of any one of claims 11 to 18.
A computer readable storage medium having computer readable instructions stored thereon which, when run on a communication device, cause the communication device to perform the method of any of claims 1-18.
A chip, wherein the chip is connected to a memory or the chip comprises the memory for reading and executing a software program stored in the memory to implement the method according to any one of claims 1 to 18.