A communication method and apparatus

Abstract

A communication method and apparatus, which are used to select a reference signal consistent with the network side for subsequent adjustment of transmitted and received signals when multiple reference signals are received. The method includes the following steps: receiving multiple reference signals, where the multiple reference signals include a first reference signal and a second reference signal; receiving first information, 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; transmitting the uplink signal and / or receiving the downlink signal; where a parameter corresponding to the uplink signal and / or a parameter corresponding to the downlink signal is determined according to the association relationship.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and particularly to a communication method and apparatus. Background Art

[0002] In an 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. The terminal device adjusts the parameters corresponding to the uplink and downlink signals by using downlink reference signals sent by the node. For example, the timing offset and 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. Usually, the terminal device performs time-frequency offset tracking on the downlink signal by using a tracking reference signal (TRS). The terminal device adjusts the reception of the downlink signal based on the time-frequency offset estimation obtained by receiving the TRS. Also, for example, in order to achieve correct transmission, the terminal device needs to adjust parameters corresponding to the uplink signal. The terminal device adjusts the transmission of the uplink signal based on the time-frequency offset estimation obtained by receiving the TRS.

[0003] How to improve the accuracy of parameter adjustment of the uplink and downlink signals by the terminal device is a problem to be solved. Summary of the Invention

[0004] This application provides a communication method and apparatus, aiming to make the reference signals determined by the node and the terminal for adjusting signal parameters consistent, thereby improving the communication quality between the node and the terminal.

[0005] In a first aspect, a communication method is provided. The execution subject of this method may be a terminal device or a chip, a chip system, or a circuit located in the terminal device. This method is implemented through the following steps: receiving a plurality of reference signals, where the plurality of reference signals include a first reference signal and a second reference signal; receiving first information, 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; sending the uplink signal and / or receiving the downlink signal; where the parameters corresponding to the uplink signal and / or the parameters corresponding to the downlink signal are determined according to the association relationship. Through the above method, when the terminal receives a plurality of reference signals, it can determine to use the first reference signal among the plurality of reference signals as the reference for adjusting the parameters of the uplink and downlink signals according to the first information sent by the network device or the node. In this way, the reference signal used by the terminal device for adjusting the parameters of the uplink and downlink signals is consistent with the reference signal selected by the node, and the parameter adjustment result of the uplink and downlink signals of the terminal device is synchronized with the node, improving the accuracy of parameter adjustment of the uplink and downlink signals by the terminal device and improving the communication quality between the node and the terminal device.

[0006] In a possible design, the parameters corresponding to the uplink signal include the carrier frequency point, and the uplink signal is transmitted at the carrier frequency point of the first reference signal. In this way, when multiple reference signals are received, the terminal device can determine to transmit the uplink signal at the carrier frequency point of the first reference signal according to the first information of the first node, so that the terminal can be frequency-aligned with the first node, which helps to improve the accuracy of the carrier frequency point adjustment of the uplink signal by the terminal device.

[0007] In a possible design, the parameters corresponding to the downlink signal include the carrier frequency point, and the downlink signal is received at the carrier frequency point of the first reference signal. In this way, when multiple reference signals are received, the terminal device can determine to receive the downlink signal at the carrier frequency point of the first reference signal according to the first information of the first node, so that the terminal can be frequency-aligned with the first node, which helps to improve the accuracy of the carrier frequency point adjustment of the downlink signal by the terminal device.

[0008] In a possible design, the parameters corresponding to the uplink signal include the Doppler frequency shift, and the uplink signal is transmitted on the basis of frequency alignment according to the Doppler frequency shift. In this way, when multiple reference signals are received, the terminal device can determine the carrier frequency for transmitting the uplink signal according to the Doppler frequency shift of the first reference signal according to the first information of the first node, so that the terminal can be frequency-aligned with the first node, which helps to improve the accuracy of the carrier frequency point adjustment of the uplink signal by the terminal device.

[0009] In a possible design, the parameters corresponding to the downlink signal include the Doppler frequency shift, and the downlink signal is received on the basis of frequency alignment according to the Doppler frequency shift. In this way, when multiple reference signals are received, the terminal device can determine the carrier frequency for receiving the downlink signal according to the Doppler frequency shift of the first reference signal according to the first information of the first node, so that the terminal can be frequency-aligned with the first node, which helps to improve the accuracy of the carrier frequency point adjustment of the downlink signal by the terminal device.

[0010] In a possible design, the parameters corresponding to the uplink signal include the time synchronization reference, and the uplink signal is transmitted on the basis of time synchronization according to the time synchronization reference of the first reference signal. In this way, when multiple reference signals are received, the terminal device can perform time synchronization according to the time synchronization reference of the first reference signal according to the first information of the first node and transmit the uplink signal, so that the terminal can be time-aligned with the first node, which helps to improve the accuracy of the time adjustment of the uplink signal by the terminal device.

[0011] In a possible design, the parameters corresponding to the downlink signal include a time synchronization reference. Based on time synchronization according to the time synchronization reference of the first reference signal, the downlink signal is received. In this way, when multiple reference signals are received, 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, enabling the terminal to be time-aligned with the first node, which helps improve the accuracy of the time adjustment of the downlink signal by the terminal device.

[0012] In a possible design, the method further includes: receiving configuration information, where the configuration information is used to indicate the parameters of the first reference signal. In this way, the terminal can receive the first reference signal according to this configuration information. Optionally, the terminal may receive configuration information sent by multiple nodes respectively. The terminal device receives multiple reference signals from multiple nodes according to the configuration information.

[0013] In a second aspect, a communication method is provided. The execution subject of this method can be a node or a network device, or a chip, a chip system, or a circuit in the node or the network device. This method is implemented through the following steps: sending multiple reference signals to the terminal, where the multiple reference signals include a first reference signal and a second reference signal; sending first information to the terminal, where the first information is used to indicate that the uplink signal and / or the downlink signal has an association relationship with the first reference signal. Through the above method, by sending the first information to the terminal device, it can be indicated that the terminal device uses the first reference signal to adjust the parameters of the uplink and downlink signals, so that the parameter adjustment results of the uplink and downlink signals of the terminal device are synchronized with the node, improving the accuracy of the parameter adjustment of the uplink and downlink signals corresponding to the terminal device and improving the communication quality between the node and the terminal device.

[0014] In a possible design, the method further includes: sending configuration information to the terminal, where the configuration information is used to indicate the parameters of the first reference signal. For example, the first node sends configuration information indicating the parameters of the first reference signal to the terminal, and the terminal can receive the first reference signal according to the configuration information of the first node. Optionally, multiple nodes may send configuration information to the terminal respectively, so that the terminal receives reference signals from each node according to the multiple configuration information.

[0015] Combining the methods provided in the first aspect and the second aspect, several possible designs are given below.

[0016] In a possible design, the association relationship includes: at least one of the following between the parameters corresponding to the uplink signal and / or the parameters corresponding to the downlink signal and the parameters of the first reference signal: carrier frequency point, Doppler frequency shift, carrier frequency point synchronization reference, time synchronization reference, or time timing reference. For example, this correspondence means that at least one of the following between the parameters corresponding to the uplink signal and / or the parameters corresponding to the downlink signal and the parameters of the first reference signal is the same.

[0017] The first information may indicate the association relationship in an explicit or implicit manner. Several possible implementation manners are provided below.

[0018] In a possible design, the first information includes quasi co-location (QCL) information, and the QCL information is used to indicate that the uplink signal and / or the downlink signal has a QCL relationship with the first reference signal.

[0019] In a possible design, the first information includes the state of the transmission configuration indication (TCI). The state of the TCI is the TCI state of the uplink signal and / or the downlink signal, and has a corresponding relationship with the TCI state of the first reference signal. For example, this corresponding relationship means that the TCI state of the uplink signal and / or the downlink signal is the same as the TCI state of the first reference signal.

[0020] In a possible design, the first information includes the identifier of the first reference signal, and / or the first information includes the identifier of the resource for receiving the first reference signal.

[0021] The first information can be sent through higher layer signaling. The higher layer signaling includes RRC signaling, MAC CE, or DCI.

[0022] In a possible design, the uplink signal includes any one or more of the following: uplink reference signal, signal carried on the uplink shared channel, signal carried on the access channel, or signal carried on the uplink control channel.

[0023] In a possible design, the downlink signal includes any one or more of the following: downlink reference signal, signal carried on the downlink shared channel, signal carried on the downlink control channel, or signal on the broadcast channel.

[0024] In a possible design, the first reference signal and the second reference signal belong to different cells. The first reference signal belongs to the primary cell, and the second reference signal belongs to the secondary cell.

[0025] In a third aspect, a communication method is provided, which is implemented through the following steps: A terminal device receives first configuration information and second configuration information, where the first configuration information is used to configure at least two sets of downlink reference signals; the second configuration information is used to configure at least one set of uplink reference signals; the terminal device receives first indication information, where the first indication information is used to indicate the association relationship between at least one of the at least two sets of downlink reference signals and the at least one set of uplink reference signals; the terminal device determines, according to the first indication information, that the at least one set of downlink reference signals corresponding to the at least one set of uplink reference signals has an association relationship. Through the above method, when the terminal receives multiple reference signals, it can determine, according to the first indication information, which of the multiple reference signals are used as the reference for parameter adjustment corresponding to the uplink reference signal. This enables the parameter adjustment result of the uplink reference signal of the terminal device to be synchronized with the node, improves the accuracy of parameter adjustment of the uplink reference signal of the terminal device, and improves the communication quality between the node and the terminal device.

[0026] In a possible design, the association relationship may be a quasi co-location (QCL) relationship.

[0027] In a possible design, the association relationship is used to determine the association relationship 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, and the at least one parameter includes at least one of the following parameters: carrier frequency point, Doppler shift, carrier frequency point synchronization reference, time synchronization reference, time timing reference.

[0028] In a possible design, the terminal device determines the at least one parameter used for sending the at least one set of uplink reference signals or uplink data channel or uplink control channel or uplink shared access channel according to the QCL relationship indicated by the first indication information.

[0029] In a possible design, the first configuration information may be one or more physical layer signals and / or high layer signals; the second configuration information may be one or more physical layer signals and / or high layer signals; the first indication information may be one or more physical layer signals and / or / MAC CE signals and / or high layer signals.

[0030] In a possible design, the QCL relationship may be defined as QCL type E and configured through a high layer RRC signal.

[0031] Fourth aspect, a communication method is provided, which is implemented through the following steps: A terminal device receives first configuration information for configuring multiple sets of downlink reference signals; the terminal device receives first indication information for instructing the terminal device to determine at least one parameter for the terminal device to receive downlink transmission according to at least one set of downlink reference signals among the multiple sets of downlink reference signals. Through the above method, when the terminal receives multiple reference signals, it can, according to the first indication information, determine to use one reference signal among the multiple reference signals as the reference for parameter adjustment corresponding to the downlink signal. In this way, the parameter adjustment result of the downlink signal of the terminal device is synchronized with the node, improving the accuracy of the parameter adjustment of the downlink signal of the terminal device and the communication quality between the node and the terminal device.

[0032] In a possible design, the at least one parameter includes at least one of the following parameters: carrier frequency point, Doppler shift, carrier frequency point synchronization reference, time synchronization reference, time timing reference.

[0033] In a 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.

[0034] Fifth aspect, an embodiment of the present application provides a communication device, which includes a communication interface and a processor. The communication interface is used for the device to communicate with other devices, such as for receiving and transmitting data or signals. Exemplarily, the communication interface can be a transceiver, a circuit, a bus, a module, or other types of communication interfaces, and the other devices can be network devices or nodes. The processor is used to call a set of programs, instructions, or data to execute the methods described in the first aspect, the third aspect, or the fourth aspect above. The device may further include a memory for storing the programs, instructions, or data called by the processor. The memory is coupled to the processor, and when the processor executes the programs, instructions, or data stored in the memory, it can implement the methods described in the first aspect, the third aspect, or the fourth aspect above.

[0035] Sixth aspect, an embodiment of the present application provides a communication device, which includes a communication interface and a processor. The communication interface is used for the device to communicate with other devices, such as for receiving and transmitting data or signals. Exemplarily, the communication interface can be a transceiver, a circuit, a bus, a module, or other types of communication interfaces, and the other devices can be terminal devices. The processor is used to call a set of programs, instructions, or data to execute the method described in the second aspect above. The device may further include a memory for storing the programs, instructions, or data called by the processor. The memory is coupled to the processor, and when the processor executes the programs, instructions, or data stored in the memory, it can implement the method described in the second aspect above.

[0036] In a seventh aspect, an embodiment of the present application further provides a computer-readable storage medium, in which computer-readable instructions are stored. When the computer-readable instructions run on a computer, the computer is caused to execute the method described in the first aspect, the third aspect, the fourth aspect, or any possible design in these aspects.

[0037] In an eighth aspect, an embodiment of the present application further provides a computer-readable storage medium, including instructions, which when running on a computer, cause the computer to execute the method described in the second aspect or any possible design in the second aspect.

[0038] In a ninth aspect, an embodiment of the present application provides a chip system, which includes a processor and may further include a memory, and is used to implement the method described in the first aspect, the third aspect, the fourth aspect, or any possible design in these aspects. The chip system may be composed of chips or may include chips and other discrete devices.

[0039] In a tenth aspect, an embodiment of the present application provides a chip system, which includes a processor and may further include a memory, and is used to implement the method described in the second aspect or any possible design in the second aspect. The chip system may be composed of chips or may include chips and other discrete devices.

[0040] In an eleventh aspect, an embodiment of the present application provides a communication system, which includes a terminal device and a node. The terminal device is used to execute the method described in the first aspect, the third aspect, the fourth aspect, or any possible design in these aspects; the node is used to execute the method described in the second aspect or any possible design in the second aspect.

[0041] In a twelfth aspect, a computer program product containing instructions is provided, which when running on a computer, causes the computer to execute the methods described in the above aspects and any possible design in each aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1a It is a schematic diagram of the communication system architecture in an embodiment of the present application;

[0043] Figure 1b It is a schematic diagram of the SFN architecture of the 4G communication system in an embodiment of the present application;

[0044] Figure 1c It is a schematic diagram of the Hyper Cell architecture of the 4G communication system in an embodiment of the present application;

[0045] Figure 2 It is a schematic diagram of the time-frequency offset tracking method in LTE in an embodiment of the present application;

[0046] Figure 3 Schematic diagram of the time-frequency offset tracking method in NR in the embodiments of the present application;

[0047] Figure 4 One of the schematic diagrams of the communication method flow in the embodiments of the present application;

[0048] Figure 5 Another schematic diagram of the communication method flow in the embodiments of the present application;

[0049] Figure 6 Another schematic diagram of the communication method flow in the embodiments of the present application;

[0050] Figure 7 Another schematic diagram of the communication method flow in the embodiments of the present application;

[0051] Figure 8 One of the schematic diagrams of the communication device structure in the embodiments of the present application;

[0052] Figure 9 Another schematic diagram of the communication device structure in the embodiments of the present application. Detailed implementation manners

[0053] The embodiments of the present application provide a communication method and a device. Among them, the method and the device are based on the same or similar concepts of the same technology. Since the principles of the method and the device for solving problems are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be described again. In the embodiments of the present application, "at least one" means one or more. "Multiple" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item) of the following" or its similar expression refers to any combination of these items, including any combination of single item (s) or plural item (s). For example, at least one (item) of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c. Each of a, b, and c itself can be an element or a set containing one or more elements.

[0054] In the present application, expressions such as "exemplary", "in some embodiments", and "in other embodiments" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, the use of the word "exemplary" is intended to present concepts in a specific manner.

[0055] In this application, the words "of" and "corresponding" can sometimes be used interchangeably. It should be noted that when the difference between them is not emphasized, the meanings they convey are the same. In the embodiments of this application, communication and transmission can sometimes be used interchangeably. It should be noted that when the difference is not emphasized, the meanings they convey are the same. For example, transmission can include sending and / or receiving, and can be a noun or a verb.

[0056] It should be noted that in the embodiments of this application, words such as "first" and "second" are only used for the purpose of distinguishing descriptions, and should not be construed as indicating or implying relative importance, nor as indicating or implying an order.

[0057] The communication method provided by the embodiments of this application can be applied to a fourth-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 various future communication systems.

[0058] Optionally, the embodiments of this application can be applicable to communication scenarios with high-speed movement, such as high-speed rail scenarios.

[0059] Figure 1a The architecture of a possible communication system to which the communication method provided by the embodiments of this application is applicable is shown. The communication system can include one or more network devices 110 and one or more terminal devices 120. Among them:

[0060] The network device 110 is a node in a radio access network (RAN), and can also be referred to as a base station, an access network device, a node, or an RAN node (or device). Currently, some examples of nodes 101 are: next generation node B (gNB), next generation evolved node B (Ng-eNB), transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home Node B, HNB), base band unit (BBU), or wireless fidelity (Wifi) 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 can also be a device that serves as a base station function in device to device (D2D) communication. In the embodiments of the present application, when the network device 110 communicates with a terminal device, the number of network devices can be one or more, and they can belong to the same cell or different cells.

[0061] The terminal device 120, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice or data connectivity to users and can also be an Internet of Things device. For example, the terminal device 120 includes handheld devices, in-vehicle devices, etc. with wireless connection functions. Currently, the terminal device 120 can be: mobile phone, tablet computer, laptop computer, palmtop computer, mobile internet device (MID), wearable device (such as smart watch, smart bracelet, pedometer, etc.), in-vehicle device (such as car, bicycle, electric vehicle, airplane, ship, train, high-speed rail, etc.), virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, smart home device (such as refrigerator, TV, air conditioner, electric meter, etc.), smart robot, workshop device, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, or wireless terminal in smart home, flying device (such as smart robot, hot air balloon, unmanned aerial vehicle, airplane), etc. The terminal 120 can also be a device that serves as a terminal function in D2D communication. This application uses the terminal to describe.

[0062] Among them, the terminal in the embodiments of this application can move at high speed. It should be noted that the high speed in the embodiments of this application can be understood as the moving speed not less than a certain threshold. For example, the threshold can be 100 m / s, 120 m / s, 350 km / h to 500 km / h, etc., which can be predefined through a communication protocol or determined by the terminal according to a preset algorithm or rule, and this is not limited. By way of example, the specific forms of the terminal in the high-speed moving scenario can be an unmanned aerial vehicle (UAV) flying in the air, an airborne terminal, an airplane, a high-speed rail, an in-vehicle terminal, etc. Specifically, a UAV can be understood as an aircraft remotely controlled by radio equipment or self-programmed for control.

[0063] The embodiments of the present application are applicable to single or multiple transmission reception point (TRP) scenarios, as well as any derivative scenarios thereof. In the multiple TRP scenario, multiple TRPs can be connected to the same baseband unit (BBU), or can be connected to different BBUs. Here, multiple TRPs can belong to the same cell or different cells.

[0064] In some application scenarios, such as high-speed mobile communication scenarios, the terminal device can communicate with multiple nodes. For example, in the multiple transmission reception point (Multi-TRP) scenario, the terminal device can communicate with multiple TRPs. For example, the implementation form of Multi-TRP in 4G is the single-frequency network cell (SFN cell), and one implementation form in 5G is the hyper cell.

[0065] As Figure 1b shown, the SFN in 4G means that in a geographical area, multiple pico remote radio units (pRRUs) operating on the same frequency band are combined to form the same cell, with the same physical cell identity (PCI). Here, the number of channels and antennas of the pRRU is the same. The SFN adopts a joint scheduling method, which improves the capacity by 45% - 50% compared with ordinary cells by reducing the interference in the overlapping area and reducing the number of handovers. In the architecture of the SFN, the BBU can implement the functions of layer 3 and layer 2, and the TRP implements the function of the pRRU. The BBU performs data scheduling and processing, and transmits the uplink and downlink signals to other devices through the pRRU.

[0066] As Figure 1c shown, the Hyper Cell in 5G is a key technology in the 5G high-speed networking scenario (high-speed rail, highway). The service channels are independent among the TRPs, and each TRP can be independently scheduled, and the capacity is equal to the sum of multiple TRPs. It can reduce frequent handovers and improve the user experience in high-speed scenarios. Compared with the SFN technology of LTE, it not only realizes the expansion of the coverage range, but also increases the system capacity. It supports sending data on different layers. In the Hyper Cell architecture, the BBU can implement the functions of layer 3 and layer 2, and the layer 2 scheduling can be realized through the scheduling cooperation processing module. The TRP implements the function of the pRRU. The BBU performs data scheduling and processing, and transmits the uplink and downlink signals to other devices through the pRRU.

[0067] Taking the high - speed rail scenario as an example, the possible characteristics of the communication scenario with high - speed movement are introduced. 1) In the high - speed rail scenario, the moving speed of the train is very high, generally reaching 350 km / h to 500 km / h. Therefore, the terminals in high - speed movement have a high moving speed. 2) The Doppler frequency shift is relatively large in the high - speed movement scenario. For example, when the carrier frequency is 3.5 GHz: the maximum Doppler frequency shift is 1.1 KHz at a speed of 350 km / h, and the maximum Doppler frequency shift is 1.6 KHz at a speed of 500 km / h. 3) The number of terminal devices in the high - speed rail scenario is relatively large. High - speed rail trains are usually composed of 8 or 16 carriages. Generally, they can carry 500 to 1000 passengers. Therefore, the number of terminal devices may also be between 500 and 1000. 4) During the operation of the high - speed rail, the terminal devices on the train may need to communicate with multiple adjacent TRPs.

[0068] In the embodiments of the present application, the network device sends a reference signal to the terminal device, and this reference signal is used for adjusting the parameters corresponding to the uplink and downlink signals to achieve correct signal transmission and reception.

[0069] To facilitate the understanding of the method in the embodiments of the present application, the concepts of several terms are introduced below.

[0070] 1. The concept of quasi - co - location (QCL). QCL is used to indicate that one or more identical or similar communication characteristics exist between multiple resources. For multiple resources with a QCL relationship, the same or similar communication configurations can be adopted. For example, if there is a QCL relationship between two antenna ports, then the large - scale characteristics of the channel for transmitting one symbol from one port can be inferred from the large - scale characteristics of the channel for transmitting one symbol from the other port. The large - scale characteristics may include at least one of the following characteristics: delay spread, average delay, doppler spread, doppler shift, average gain, reception parameters, terminal device reception beam number, transmit / receive channel correlation, angle of arrival of reception, spatial correlation of the receiver antenna, angle - of - arrival (AoA), average angle of arrival, spread of AoA, etc. Another example is that if two signals have a QCL relationship, then there is a QCL relationship between the antenna ports transmitting these two signals.

[0071] In the embodiments of the present application, two signals being QCL may mean that two signals have a QCL relationship, or two signals satisfy the QCL relationship.

[0072] 2. QCL types, including multiple types, such as type-A, type-B, type-C, or type-D.

[0073] Optionally, the above-mentioned several types of QCL can be understood as follows.

[0074] Type-A means that the four parameters of average time delay, Doppler shift, delay spread, and Doppler spread of two signals have a QCL relationship from the perspective of the receiving end, or in other words, the time-frequency offset of the two signals at reception has a corresponding relationship.

[0075] Type-B means that the two parameters of Doppler shift and Doppler spread of two signals have a QCL relationship from the perspective of the receiving end.

[0076] Type-C means that the two parameters of average time delay and Doppler shift of two signals have a QCL relationship from the perspective of the receiving end.

[0077] Type-D means that the spatial Rx parameters of two signals have a QCL relationship from the perspective of the receiving end.

[0078] 3. TRS. When the CSI-RS resource set includes the trs-Info field, the CSI-RS resource set can be a TRS, and the trs-Info field is used to indicate that the CSI-RS resource set is for TRS.

[0079] 4. Frequency offset, that is, frequency deviation. The frequency offset includes the carrier frequency offset (CFO) caused by the deviation of the local oscillator carrier frequencies at the transmitter and receiver and the Doppler shift caused by the relative movement between the transmitter and receiver. In a high-speed mobile scenario, the main component of the frequency offset is the Doppler shift.

[0080] Among them, when the terminal device moves in a certain direction at a constant speed, due to the difference in propagation path, phase and frequency changes will occur. Usually, this change is called Doppler shift. Or in other words, the difference between the transmitted and received frequencies caused by the Doppler effect is called Doppler shift. It reveals the law of change of the wave's properties during motion.

[0081] 5. The parameters corresponding to the uplink signal refer to the parameters used for sending the uplink signal, and the parameters corresponding to the downlink signal refer to the parameters used for receiving the downlink signal. The parameters corresponding to the uplink signal and / or the downlink signal may include one or more of the following: carrier frequency point, Doppler frequency shift, carrier frequency point synchronization reference, time synchronization reference, time timing reference, average delay, delay spread, Doppler spread, or spatial domain reception parameters.

[0082] 6. The reference signal may include a cell-specific reference signal (CRS) or a tracking reference signal (TRS).

[0083] When the network device sends a reference signal to the terminal, the terminal may adjust the reception parameters of the downlink signal according to the reference signal. The following uses Figure 2 and Figure 3 two possible implementation manners as examples for illustration.

[0084] In a possible implementation manner, as Figure 2 shown, in the LTE system, the CRS can be used for downlink time-frequency tracking, that is, the terminal device can determine the downlink timing offset and frequency offset according to the parameters of the CRS. The specific content is as follows.

[0085] S201. The eNB periodically sends cell synchronization signals, including a primary synchronized signal (PSS) and a secondary synchronization signal (SSS).

[0086] S202. After receiving the PSS / SSS, the terminal device performs downlink frequency synchronization.

[0087] S203. The terminal device receives the CRS sent by the eNB.

[0088] S204. The terminal device estimates the downlink timing and / or frequency offset and performs synchronization.

[0089] S205. The terminal device sends uplink data and a demodulation reference signal (DMRS) on the physical uplink shared channel (PUSCH) on the tracked carrier frequency.

[0090] S206. The eNB performs timing and frequency offset estimation compensation through the received DMRS.

[0091] In a possible implementation manner, asFigure 3 As shown, in the NR system, the TRS can be used for downlink time-frequency tracking to achieve correct signal transmission and reception.

[0092] S301. The gNB periodically sends the cell synchronization signal SSB.

[0093] S302. After receiving the SSB, the terminal device performs downlink frequency synchronization.

[0094] S303. The terminal device receives the TRS sent by the gNB.

[0095] S304. The terminal device estimates the downlink timing and frequency offset and performs synchronization.

[0096] S305. The terminal device sends uplink data and a demodulation reference signal (DMRS) on the PUSCH on the carrier frequency being tracked.

[0097] S306. The gNB performs timing and frequency offset estimation compensation through the received DMRS.

[0098] In the embodiments of this application, the terminal device communicates with the network device, and the network device can also send multiple reference signals to the terminal device. For example, the network device may include one or more nodes. For example, the architecture of the network device includes a BBU and nodes, and the node can be a TRP. In a single TRP transmission scenario, the architecture of the network device includes a BBU and one TRP. In a scenario with multiple TRPs, the architecture of the network device may include a BBU and multiple TRPs. As a transmission and reception point, the signals sent by the network device to the terminal and / or the signals received from the terminal can all be transmitted through the TRP. Also, for example, multiple network devices include multiple nodes. Whether the number of network devices is one or more, there may be a scenario where the terminal device receives multiple reference signals. The multiple reference signals received by the terminal device may come from one or more network devices or may come from one or more nodes. The embodiments of this application are introduced by taking multiple nodes as an example.

[0099] Multiple nodes send multiple reference signals to a terminal device. Specifically, the terminal device can communicate with multiple nodes. Each of the multiple nodes can send a reference signal to the terminal device. The purpose of this reference signal is that the terminal device can adjust the parameters corresponding to the uplink signal or the parameters corresponding to the downlink signal according to this reference signal. When the terminal device receives multiple reference signals sent by multiple nodes, it is necessary to adjust the parameters of the transmitted / received signal based on one of the reference signals. And one or more nodes that send the reference signal also need to know which reference signal the terminal device adjusts the parameters according to. In this way, the terminal device and the network device can reach an agreement, ensure the alignment of transmission and reception, and improve data reliability. The communication method provided in the embodiments of this application can achieve the above purposes.

[0100] The multiple nodes communicating with the terminal device include a first node and at least one second node. Among them, the reference signal sent by the first node to the terminal device can be denoted as the first reference signal, and the reference signal sent by the second node to the terminal device can be denoted as the second reference signal. The first node transmits the estimated frequency offset result to the second node, so that the second node can communicate with the terminal better.

[0101] As Figure 4 shown, the flow of the communication method provided in the embodiments of this application is described as follows.

[0102] S401. The network device sends multiple reference signals to the terminal device.

[0103] Correspondingly, the terminal device receives multiple reference signals.

[0104] Among them, the network device may include one or more network devices, which may belong to the same cell or different cells. When the network device includes multiple network devices, the "network device" here is a general concept.

[0105] The network device can send multiple reference signals to the terminal device through one or more nodes.

[0106] The multiple reference signals may include a first reference signal and a second reference signal. For example, the first reference signal comes from the first node, and the second reference signal comes from the second node.

[0107] S402. The network device sends the first information to the terminal device.

[0108] Correspondingly, the terminal device receives the first information.

[0109] The network device can send the first information to the terminal through the first node.

[0110] The first information is used to indicate that the uplink signal has an association relationship with the first reference signal. The first information can also be used to indicate that the downlink signal has an association relationship with the first reference signal. As an implementation, the uplink signal can be a signal that the terminal device is to send to the first node; the downlink signal can be a signal that the first node is to send to the terminal device.

[0111] The association relationship can be a mapping relationship. The association relationship can also refer to the QCL relationship.

[0112] That the uplink signal has an association relationship with the first reference signal can also be understood as that the parameters corresponding to the uplink signal have an association relationship with the parameters of the first reference signal. As an implementation, the parameters corresponding to the uplink signal are determined according to the parameters 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.

[0113] Similarly, that the downlink signal has an association relationship with the first reference signal can also be understood as that the parameters corresponding to the downlink signal have an association relationship with the parameters of the first reference signal. As an implementation, the parameters corresponding to the downlink signal are determined according to the parameters 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.

[0114] S403. The terminal device sends the uplink signal and / or receives the downlink signal according to the association relationship indicated by the first information.

[0115] The parameters corresponding to the uplink signal and / or the parameters corresponding to the downlink signal are determined according to the association relationship in the first information.

[0116] The terminal device adjusts the parameters corresponding to the uplink signal to be sent according to the parameters corresponding to the first reference signal to send the uplink signal, and / or the terminal device adjusts the parameters corresponding to the downlink signal to be received according to the parameters corresponding to the first reference signal to receive the downlink signal.

[0117] Here, the object to which the terminal device sends the uplink signal can include the first node and / or the second node; the terminal device can receive the downlink signal from the first node and / or the second node.

[0118] For example, the first information is used to indicate that the carrier frequency of the uplink signal sent by the terminal device is the same as that of the first reference signal. The terminal device sends the uplink signal at the same carrier frequency as the first reference signal according to the first information.

[0119] For example, the first information is used to indicate that the carrier frequency of the downlink signal received by the terminal device is the same as that of the first reference signal. The terminal device receives the downlink signal at the same carrier frequency as the first reference signal according to the first information.

[0120] For another example, the first piece of information is used to indicate that there is an association relationship between the uplink signal sent by the terminal device and the time synchronization reference of the first reference signal. The terminal device performs time synchronization according to the first piece of information based on the time synchronization reference of the first reference signal, and based on the time synchronization according to the time synchronization reference of the first reference signal, sends an uplink signal or receives a downlink signal.

[0121] When the terminal device receives multiple reference signals, it can determine to use the first reference signal among the multiple reference signals as the reference for parameter adjustment corresponding to the uplink and downlink signals according to the first piece of information sent by the network device or node. In this way, the network side and the terminal device can determine the same reference signal among the multiple reference signals, so that the uplink and downlink transmission parameters are consistent, improving transmission reliability.

[0122] Optionally, before S401, S400 may further be included.

[0123] S400: The network device sends configuration information to the terminal device, and the configuration information is used to indicate the parameters of the reference signal.

[0124] In a possible implementation manner, the first node sends first configuration information to the terminal device, and the first configuration information is used to indicate the parameters corresponding to the first reference signal.

[0125] In a possible implementation manner, the second node may also send second configuration information to the terminal device, and the second configuration information is used to indicate the parameters of the second reference signal.

[0126] In a possible implementation manner, the terminal device receives reference signals from one or more nodes respectively according to the configuration information sent by multiple nodes respectively.

[0127] The terminal device receives reference signals from multiple nodes respectively according to the configuration information sent by multiple nodes respectively.

[0128] Optionally, the network device may further send resource configurations of the uplink and downlink signals to the terminal device. For example, the network device sends configuration information of the SRS to the terminal device. For example, the network device may send the resource configurations of the uplink and downlink signals through one or more nodes.

[0129] The uplink signal in the embodiments of the present application may include any one or more of the following:

[0130] Uplink reference signals, for example, sounding reference signal (SRS), demodulation reference signal (DMRS), phase tracking reference signal (PTRS);

[0131] A signal carried on a shared channel, such as a signal carried on a physical uplink shared channel (PUSCH).

[0132] A signal carried on an access channel, such as a signal carried on a physical random access channel (PRACH).

[0133] A signal carried on an uplink control channel, such as a signal carried on a physical uplink control channel (PUCCH).

[0134] The downlink signals in the embodiments of the present application may include any one or more of the following:

[0135] Downlink reference signals, such as tracking reference signals (TRS), channel state information-reference signals (CSI-RS), demodulation reference signals (DMRS), and phase tracking reference signals (PTRS).

[0136] A signal carried on a downlink shared channel, such as a signal carried on a physical downlink shared channel (PDSCH).

[0137] A signal carried on a downlink control channel, such as a signal carried on a physical downlink control channel (PDCCH).

[0138] A signal carried on a broadcast channel, such as a signal carried on a physical broadcast channel (PBCH).

[0139] The following describes several possible implementation forms of the first information in the embodiments of the present application.

[0140] The first piece of information is the information sent by a network device to a terminal device for indicating that an uplink signal and / or a downlink signal has an association relationship with a first reference signal. For example, the first piece of information may be carried in one or more of the following signaling: radio resource control (RRC) signaling, media access control element (MAC CE), or downlink control information (DCI).

[0141] For example, the first piece of information may include or indicate an identifier of the first reference signal, and the identifier may be an index number. Assume that multiple reference signals sent by multiple nodes are distinguished by multiple index numbers. Carrying the index number of the first reference signal in a high-layer signal can be used to indicate that an uplink signal and / or a downlink signal has an association relationship with the first reference signal corresponding to the index number.

[0142] For another example, the first piece of information may include or indicate the state of a transmission configuration index (TCI). The state of the TCI is the TCI state of an uplink signal and / or a downlink signal, and through this TCI state, it can be determined that there is an association relationship (such as being the same) with the TCI state of the first reference signal. When the network device configures multiple TCIs for the terminal device through any one node, one of the TCIs is activated simultaneously. The TCI included or indicated in the first piece of information is the activated TCI. The terminal device may select the first reference signal corresponding to the activated TCI as the reference signal having an association relationship with the uplink signal and / or the downlink signal. Or the terminal device sends an uplink signal and / or receives a downlink signal according to the activated TCI. Or, when the network device configures multiple TCIs for the terminal device through any one node and activates multiple TCIs simultaneously, the first piece of information uses a TCI identifier (ID) to indicate one of the TCIs, and the terminal device may select the first reference signal corresponding to the TCI identifier included or indicated in the first piece of information as the 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 piece of 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 in the first piece of information as the reference signal having an association relationship with the uplink signal and / or the downlink signal.

[0143] Among them, the configuration of TCI can be implemented in the following manner. The network device sends RRC signaling to the terminal device to configure the parameters related to TCI, and the network device sends MAC CE signaling to the terminal device for activation. The MAC CE signaling is carried on the PDSCH. The terminal device receives the MAC CE signaling and sends a confirmation response. Alternatively, the network device sends DCI to the terminal device to configure TCI.

[0144] For another example, the first information may include or indicate the identifier of the resource for receiving the first reference signal. If the first reference signal is a TRS, the first information may include or indicate the CSI-RS resource corresponding to the TRS. The terminal device may select the TRS received on the CSI-RS resource included or indicated by the first information as the reference signal having an association relationship with the uplink signal and / or the downlink signal. Alternatively, the first information may include or indicate the identifier of the resource for receiving the TRS, and the terminal device may select the TRS received on the TRS resource included or indicated by the first information as the reference signal having an association relationship with the uplink signal and / or the downlink signal.

[0145] For another example, the first information may also be QCL information, which is used to indicate that the uplink signal and / or the downlink signal has a QCL relationship with the first reference signal. The QCL relationship may refer to that two signals have one type of QCL relationship among type-A, type-B, type-C, and type-D.

[0146] As an implementation manner, the existing QCL types can be extended. For example, as shown in Table 1, a new QCL type E (type-E QCL) is added. The type-E QCL means that the carrier frequency point and / or the Doppler shift of two signals are the same from the perspective of the 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 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.

[0147] Table 1

[0148]

[0149] Based on the description of the above embodiments, as Figure 5 shown, the embodiments of the present application further provide a communication method.

[0150] S501. The network device sends multiple reference signals to the terminal device, and the terminal device receives the multiple reference signals.

[0151] This step is the same as S401.

[0152] For example, the network device may send multiple reference signals to the terminal device through one or more nodes. In one possible implementation, the first node sends a first reference signal and the second node sends a second reference signal.

[0153] S502. The terminal device sends second information to the network device, and the network device receives the second information.

[0154] For example, the terminal device may send the second information to the first node and / or the second node, and the first node and / or the second node receives the second information.

[0155] The second information is used to instruct the terminal device to select a first reference signal from multiple reference signals to adjust parameters corresponding to uplink and downlink signals.

[0156] As an implementation, the second information may reuse the mechanism of ACK / NACK information. For example, the terminal device sends an ACK message to the first node, and the ACK message is used to instruct the terminal device to select a first reference signal. The terminal device sends a NACK message to the first node, and the NACK message is used to instruct the terminal device to select a second reference signal. The specific indication content of the ACK / NACK information is not limited in the embodiments of this application.

[0157] The second information may also be sent through higher-layer signaling. The interpretation of the higher-layer signaling refers to the interpretation of the higher-layer signaling in the above text.

[0158] S503. The terminal device sends an uplink signal and / or receives a downlink signal according to the second information.

[0159] The terminal device determines the parameters corresponding to the first reference signal. According to the parameters corresponding to the first reference signal, the terminal device sends an uplink signal; the terminal device may also receive a downlink signal according to the parameters corresponding to the first reference signal.

[0160] Specifically, similar to S403, the terminal device adjusts the parameters corresponding to the uplink signal to be sent according to the parameters corresponding to the first reference signal to send the uplink signal, and / or the terminal device adjusts the parameters corresponding to the downlink signal to be received according to the parameters corresponding to the first reference signal to receive the downlink signal.

[0161] Here, the object to which the terminal device sends the uplink signal may include the first node and / or the second node; the terminal device may receive the downlink signal from the first node and / or the second node.

[0162] Optionally, S500 is included before S501, and S500 is the same as S400.

[0163] Based on the description of the above embodiments, as Figure 6 shown, an embodiment of the present application further provides a communication method.

[0164] S601. Multiple nodes send multiple reference signals to a terminal device, and the terminal device receives the multiple reference signals.

[0165] This step is the same as S401.

[0166] For example, the first node sends a first reference signal to the terminal device, and the second node sends a second reference signal to the terminal device. Figure 6 In

[0167] S602. The terminal device determines the parameters corresponding to the first reference signal;

[0168] S603. The terminal device sends an uplink signal to the first node and receives a downlink signal from the first node according to the parameters corresponding to the first reference signal.

[0169] S604. The terminal device determines the parameters corresponding to the second reference signal.

[0170] S605. The terminal device sends an uplink signal to the second node and receives a downlink signal from the second node according to the parameters corresponding to the second reference signal.

[0171] The execution order of S602 to S603 and S604 to S605 is not limited, and they can be performed simultaneously or in an exchanged order.

[0172] Optionally, before S601, it includes S600, and S500 is the same as S400.

[0173] Based on the description of the above embodiments, as Figure 7 shown, an embodiment of the present application further provides a communication method.

[0174] S700. A network device sends configuration information to a terminal device, and the terminal device receives the configuration information.

[0175] The configuration information includes the mapping relationship between m reference signals and n uplink signals, where m and n are positive integers. Among them, the mapping relationship can be that one reference signal can correspond to one uplink signal, or one reference signal can also correspond to multiple uplink signals; one uplink signal can also correspond to multiple reference signals. This corresponding relationship can be represented by the corresponding relationship between the resources of the reference signal and the resources of the uplink signal. For example, if the reference signal is TRS and the uplink signal is SRS, then the configuration information includes the mapping relationship between m TRS resources and n SRS resources.

[0176] The network device can send configuration information to the terminal device through any one or more of multiple nodes.

[0177] S701. The terminal device sends a first uplink signal to the network device.

[0178] The corresponding network device receives the first uplink signal.

[0179] Among them, the first uplink signal has a corresponding relationship with the first reference signal. The terminal device sends the first uplink signal according to the parameters corresponding to the first reference signal. For example, the terminal device sends the first uplink signal on the carrier frequency point where the first reference signal is received. Another example is that the terminal device sends the first uplink signal on the basis of time synchronization according to the time synchronization reference of the first reference signal.

[0180] S702. The network device determines that the terminal device uses the first reference signal corresponding to the first uplink signal as the uplink and downlink transmission parameter adjustment reference.

[0181] Among them, the terminal device uses the first reference signal as the uplink and downlink transmission parameter adjustment reference, that is, the terminal device sends an uplink signal and / or receives a downlink signal according to the parameters corresponding to the first reference signal.

[0182] In S702, the network device can determine the first reference signal resource corresponding to the first uplink signal resource according to the first uplink signal resource for receiving the uplink signal, so as to determine that the terminal device uses the first reference signal on the first reference signal resource as the uplink and downlink transmission parameter adjustment reference.

[0183] As above Figures 4 to 7 In the embodiments shown above, multiple nodes send multiple reference signals to the terminal device. Specifically, there can be multiple possible selection methods for the network device or the terminal to select which reference signal among the multiple reference signals as the reference for subsequent signal transmission and reception.

[0184] In a possible implementation manner, multiple nodes belong to the same cell. For example, in the Multi-TRP scenario, there is no handover between multiple cells on the same frequency band. The network device can select a reference signal according to the distance between the node and the terminal device. For example, when the terminal device is moving and approaching the first node, the distance between the first node and the terminal device is less than the distance between the second node and the terminal device. The first node sends a first message to the terminal device, instructing the terminal device to select the first reference signal.

[0185] In another possible implementation, multiple nodes may belong to different cells. For example, in a Multi-TRP scenario, multiple nodes jointly provide services for a terminal device. The first node is the primary node and the second node is the secondary node. Among them, the first information may further include the identifiers of the primary node and the secondary node. When multiple nodes send multiple reference signals, the terminal device selects the reference signal sent by the primary node as the parameter adjustment benchmark for uplink and downlink transmission.

[0186] In another possible implementation, for example, in a Multi-TRP scenario, the terminal device identifies which TRP sends the received DCI through the index in the received control resource set (CORESET). The terminal device selects the reference signal corresponding to the TRP to which the DCI belongs as the parameter adjustment benchmark for uplink and downlink transmission, that is, by default, the downlink signal corresponding to the TRP is used for time / frequency synchronization. The downlink signal used may be an SSB (PBCH), a TRS, or a CSI-RS.

[0187] It should be noted that the examples in each application scenario of this application only show some possible implementation methods, which are for better understanding and explanation of the method of this application. Those skilled in the art can obtain some examples of evolved forms according to the indication method of the reference signal provided in the application.

[0188] In the above embodiments provided by this application, the method provided by the embodiments of this application is introduced from the perspectives of the terminal device, the node, and the interaction between the terminal device and the node. To implement each function in the method provided by the above embodiments of this application, the network device and the terminal may include a hardware structure and / or a software module, and implement the above functions in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module. Whether a certain function among the above functions is executed in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module depends on the specific application and design constraints of the technical solution.

[0189] Such as Figure 8As shown, based on the same inventive concept, an embodiment of the present application further provides a communication device 800. The communication device 800 may be a terminal device, a network device or a node, or a device in a terminal device, a network device or a node, or a device that can be used in combination with a terminal device, a network device or a node. In one design, the communication device 800 may include modules corresponding one by one to the methods / operations / steps / actions performed by the terminal device or the node in the above method embodiments. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the communication device may include a processing module 801 and a communication module 802. The processing module 801 is used to call the communication module 802 to perform the functions of receiving and / or sending.

[0190] When used to execute the method performed by the terminal device:

[0191] The communication module 802 is used to receive a plurality of reference signals, the plurality of reference signals including a first reference signal and a second reference signal; and to receive first information, the first information being used to indicate that an uplink signal and / or a downlink signal has an association relationship with the first reference signal; and to send the uplink signal and / or receive the downlink signal; wherein, the parameters corresponding to the uplink signal and / or the parameters corresponding to the downlink signal are determined according to the association relationship.

[0192] The processing module 801 and the communication module 802 may also be used to perform other corresponding steps or operations performed by the terminal device in the above method embodiments, which will not be elaborated here one by one.

[0193] When used to execute the method performed by the network device or the node:

[0194] The communication module 802 is used to send a plurality of reference signals to the terminal, the plurality of reference signals including a first reference signal and a second reference signal; and to send first information to the terminal, the first information being used to indicate that an uplink signal and / or a downlink signal has an association relationship with the first reference signal.

[0195] The processing module 801 and the communication module 802 may also be used to perform other corresponding steps or operations performed by the node in the above method embodiments, which will not be elaborated here one by one.

[0196] The division of modules in the embodiments of the present application is illustrative, merely a logical function division. In actual implementation, there may be other division methods. In addition, in each embodiment of the present application, each functional module may be integrated in one processor, may exist alone physically, or two or more modules may be integrated in one module. The above integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0197] Such as Figure 9The communication device 900 provided in the embodiment of the present application is shown, which is used to implement the functions of the terminal device, network device, or node in the above method. When implementing the functions of the network device or node, the device can be a network device or node, or a device in the network device or node, or a device that can be used in combination with the network device or node. When implementing the functions of the terminal device, the device can be a terminal device, or a device in the terminal device, or a device that can be used in combination with the terminal device. Among them, the device can be a chip system. In the embodiment of the present application, the chip system can be composed of chips, or can include chips and other discrete devices. The communication device 900 includes at least one processor 920, which is used to implement the functions of the terminal device or network device in the method provided in the embodiment of the present application. The communication device 900 may further include a communication interface 910. In the embodiment of the present application, the communication interface can be a transceiver, circuit, bus, module, or other type of communication interface, which is used to communicate with other devices through a transmission medium. For example, the communication interface 910 is used for the device in the device 900 to communicate with other devices. Exemplarily, when the communication device 900 is a network device, the other device can be a terminal device. When the communication device 900 is a terminal device, the other device can be a network device. The processor 920 uses the communication interface 910 to transmit and receive data, and is used to implement the methods described in the above various method embodiments. Exemplarily, when implementing the functions of the network device, the processor 920 is used to use the communication interface to send multiple reference signals to the terminal, the multiple reference signals include a first reference signal and a second reference signal, and to send a first piece of information to the terminal, the first piece of information is used to indicate that the uplink signal and / or downlink signal has an association relationship with the first reference signal. When implementing the functions of the terminal device, the processor 920 is used to use the communication interface to receive multiple reference signals, the multiple reference signals include a first reference signal and a second reference signal; and is used to use the communication interface 910 to receive a first piece of information, the first piece of information is used to indicate that the uplink signal and / or downlink signal has an association relationship with the first reference signal; and to use the communication interface 910 to send the uplink signal and / or receive the downlink signal; wherein, the parameters corresponding to the uplink signal and / or the parameters corresponding to the downlink signal are determined according to the association relationship. The processor 920 and the communication interface 910 can also be used to execute other corresponding steps or operations performed by the terminal device or node in the above method embodiments, which will not be elaborated here one by one.

[0198] The apparatus 900 may further include at least one memory 930 for storing program instructions and / or data. The memory 930 is coupled to the processor 920. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms for information interaction between devices, units or modules. The processor 920 may cooperate with the memory 930. The processor 920 may execute the program instructions stored in the memory 930. At least one of the at least one memory may be included in the processor.

[0199] In the embodiments of the present application, the specific connection medium between the communication interface 910, the processor 920 and the memory 930 is not limited. In the embodiments of the present application Figure 9 it is shown that the memory 930, the processor 920 and the communication interface 910 are connected through a bus 940. The bus is represented by a thick line in Figure 9 which. The connection manners between other components are only schematically illustrated and not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 9 only one thick line is used to represent it in which, but it does not mean that there is only one bus or one type of bus.

[0200] When the apparatus 1200 and the apparatus 900 are specifically chips or chip systems, the baseband signals may be output or received by the communication module 1202 and the communication interface 910. When the apparatus 1200 and the apparatus 900 are specifically devices, the radio frequency signals may be output or received by the communication module 1202 and the communication interface 910. 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 devices, discrete gate or transistor logic devices, discrete hardware components, and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in combination with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0201] In the embodiments 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), etc., or may also be a volatile memory, such as a random-access memory (RAM). A 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 can be accessed by a computer, but is not limited thereto. The memory in the embodiments of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and / or data.

[0202] Some or all of the operations and functions performed by the terminal device described in the method embodiments of the present application, or some or all of the operations and functions performed by the node, can be completed by a chip or an integrated circuit.

[0203] To implement the above Figure 8 or Figure 9 functions of the communication device, the embodiments of the present application further provide a chip, including a processor, for supporting the communication device to implement the functions involved in the terminal device or the node in the above method embodiments. In a possible design, the chip is connected to a memory or the chip includes a memory, and the memory is used to store necessary program instructions and data of the communication device.

[0204] The embodiments of the present application provide a computer-readable storage medium, storing a computer program, and the computer program includes instructions for executing the above method embodiments.

[0205] The embodiments of the present application provide a computer program product containing instructions, which, when running on a computer, cause the computer to execute the above method embodiments.

[0206] Those skilled in the art should understand that the embodiments of the present application may be provided as a method, a system, or a computer program product. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program code.

[0207] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general purpose computers, special purpose computers, embedded processors, or other programmable data processing devices to produce a machine, such that the instructions executed by the processors of the computer or other programmable data processing devices produce means for implementing the functions specified in one or more flows of the flowchart and / or one or more blocks of the block diagram.

[0208] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including instruction means that implement the functions specified in one or more flows of the flowchart and / or one or more blocks of the block diagram.

[0209] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows of the flowchart and / or one or more blocks of the block diagram.

[0210] Although the preferred embodiments of the application have been described, additional changes and modifications can be made by those skilled in the art once they learn of the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the application.

[0211] Obviously, those skilled in the art can make various changes and variations to the embodiments of the application without departing from the spirit and scope of the embodiments of the application. Thus, if these modifications and variations of the embodiments of the application fall within the scope of the claims of the application and their equivalent technologies, the application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that Comprising: Receiving a plurality of reference signals, the plurality of reference signals including a first reference signal and a second reference signal; Receiving first information, the first information being used to indicate that an uplink signal and / or a downlink signal has an association relationship with the first reference signal, the association relationship being used for communication synchronization between a terminal and a network device; Transmitting the uplink signal and / or receiving the downlink signal; wherein, parameters corresponding to the uplink signal and / or parameters corresponding to the downlink signal are determined according to the association relationship.

2. The method according to claim 1, characterized in that, The association relationship includes: at least one of the following between parameters corresponding to the uplink signal and / or parameters corresponding to the downlink signal and parameters of the first reference signal has a corresponding relationship: Carrier frequency point, Doppler frequency shift, carrier frequency point synchronization reference, time synchronization reference or time timing reference.

3. The method according to claim 1, characterized in that, The first information includes quasi co-location (QCL) information, the QCL information being used to indicate that the uplink signal and / or the downlink signal has a QCL relationship with the first reference signal.

4. The method according to claim 1, characterized in that, The first information includes the state of transmission configuration indication (TCI), the state of TCI being the TCI state of the uplink signal and / or the downlink signal and having a corresponding relationship with the TCI state of the first reference signal.

5. The method according to claim 1, characterized in that, The first information includes an identifier of the first reference signal, and / or, the first information includes an identifier of a resource for receiving the first reference signal.

6. The method according to any one of claims 2 to 5, characterized in that Parameters corresponding to the uplink signal and / or parameters corresponding to the downlink signal include a carrier frequency point; The transmitting the uplink signal and / or receiving the downlink signal includes: transmitting the uplink signal and / or receiving the downlink signal at the carrier frequency point of the first reference signal.

7. The method according to any one of claims 2 to 5, characterized in that, Parameters corresponding to the uplink signal and / or parameters corresponding to the downlink signal include a time synchronization reference; The transmitting the uplink signal and / or receiving the downlink signal includes: On the basis of time synchronization according to the time synchronization reference of the first reference signal, transmitting the uplink signal and / or receiving the downlink signal.

8. The method according to any one of claims 1 to 5, characterized in that, The uplink signal includes any one or more of the following: an uplink reference signal, a signal carried on an uplink shared channel, a signal carried on an access channel or a signal carried on an uplink control channel; The downlink signal includes any one or more of the following: a downlink reference signal, a signal carried on a downlink shared channel, a signal carried on a downlink control channel or a broadcast channel signal.

9. The method according to any one of claims 1 to 5, characterized in that 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.

10. The method according to any one of claims 1 to 5, characterized in that, The method further includes: Receiving configuration information, the configuration information being used to indicate parameters of the first reference signal.

11. A communication method, characterized in that, Comprising: Sending a plurality of reference signals to a terminal, the plurality of reference signals including a first reference signal and a second reference signal; Sending the first information to the terminal, the first information being used to indicate that an uplink signal and / or a downlink signal has an association relationship with the first reference signal, the association relationship being used for communication synchronization between the terminal and the network device.

12. The method according to claim 11, wherein The associated relationship includes that at least one of the parameters corresponding to the uplink signal and / or the parameters corresponding to the downlink signal and the parameters of the first reference signal has a corresponding relationship as follows: Carrier frequency point, Doppler frequency shift, carrier frequency point synchronization reference, time synchronization reference or time timing reference.

13. The method according to claim 11, wherein The first information includes quasi - co - location (QCL) information, and the QCL information is used to indicate that the uplink signal and / or the downlink signal has a QCL relationship with the first reference signal.

14. The method according to claim 11, wherein The first information includes the state of the transmission configuration indication (TCI), the TCI state being the TCI state of the uplink signal and / or the downlink signal and having a corresponding relationship with the TCI state of the first reference signal.

15. The method according to claim 11, characterized in that, The first information includes the identifier of the first reference signal, and / or the first information includes the identifier of the resource for receiving the first reference signal.

16. The method according to any one of claims 11 to 15, characterized in that, The uplink signal includes any one or more of the following: uplink reference signal, signal carried on the uplink shared channel, signal carried on the access channel or signal carried on the uplink control channel; The downlink signal includes any one or more of the following: downlink reference signal, signal carried on the downlink shared channel, signal carried on the downlink control channel or signal in the broadcast channel.

17. The method according to any one of claims 11 to 15, characterized in that The first reference signal and the second reference signal belong to different cells, the first reference signal belongs to the primary cell, and the second reference signal belongs to the secondary cell.

18. The method according to any one of claims 11 to 15, characterized in that The method further includes: Sending configuration information to the terminal, where the configuration information is used to indicate the parameters of the first reference signal.

19. A communication device, characterized in that, Comprising a processor and a communication interface, the communication interface being used to communicate with other communication devices; the processor being used to run a set of programs so that the communication device implements the method according to any one of claims 1 to 10.

20. A communication device, characterized in that, Comprising a processor and a communication interface, the communication interface being used to communicate with other communication devices; the processor being used to run a set of programs so that the communication device implements the method according to any one of claims 11 to 18.

21. A computer-readable storage medium, characterized in that, The computer - readable instructions are stored in the computer storage medium. When the computer - readable instructions run on the communication device, the communication device is made to execute the method according to any one of claims 1 to 18.

22. A chip, characterized in that, The chip is connected to the memory or the chip includes the memory, and is used to read and execute the software program stored in the memory to implement the method according to any one of claims 1 to 18.

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