A method for determining phase offset, a communication system and related devices

Abstract

The application provides a phase offset determination method, a communication system and related devices. In the method, the network side can display an instruction for a terminal device to use the same port when receiving a CSI-RS and transmitting an SRS, thereby ensuring uplink and downlink reference consistency and improving the accuracy of PO measurement.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method and related apparatus for determining phase offset. Background Technology

[0002] In wireless communication systems, to improve overall network performance, coherent joint transmission (CJT) technology can be employed. This involves multiple geographically separated transmission reception points (TRPs) working collaboratively to provide services to one or more terminal devices. Generally, the TRPs achieve ideal synchronization and calibration to ensure coherent signal superposition in the air, thereby achieving joint gain and interference suppression.

[0003] However, in actual deployments, because TRPs do not share a unified clock, frequency and phase offsets may exist, making it difficult for the signals to achieve ideal coherent superposition when they reach the terminal device. Therefore, how to help the network sense and compensate for the phase offset (PO) between TRPs is an urgent problem to be solved. Summary of the Invention

[0004] This application provides a method for determining phase offset, a communication system, and related devices. This method can instruct terminal devices to use the same port during CSI-RS reception and SRS transmission, ensuring reference consistency between uplink and downlink and improving the accuracy of PO measurement.

[0005] In a first aspect, embodiments of this application provide a communication method applicable to a network-side device. This network-side device may be a first network element, a component applied within the first network element (e.g., a processor, chip, circuit, or chip system), or a logic module or software capable of implementing all or part of the functions of the first network element. The method includes:

[0006] Send a first signaling, wherein the first signaling is used to activate a first trigger state and indicate that the port used by the Receive Channel State Information Reference Signal (CSI-RS) is the same as the port corresponding to the first trigger state, the first trigger state corresponds to a first Probe Reference Signal (SRS) resource, and the first Probe Reference Signal (SRS) resource includes a first SRS and a first port corresponding to the first SRS.

[0007] The first SRS is received, wherein the first SRS is sent by the terminal device through the first port, the first SRS is used to determine the first uplink channel measurement result, the first uplink channel measurement result is used to determine the uplink phase offset, and the uplink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the uplink direction.

[0008] The terminal device sends a first channel state information reference signal (CSI-RS) through the first port. The first CSI-RS is used to determine a first downlink channel measurement result. The first downlink channel measurement result is used to determine a downlink phase offset. The downlink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the downlink direction.

[0009] Wherein, the first network element is the reference transmission receiving point (TRP) in the cooperative joint transmission system, and the second network element includes the cooperative TRP in the cooperative joint transmission system.

[0010] As some examples, the first downlink channel measurement results can be carried in the CSI report; or the downlink phase offset can be carried in the PO report, wherein the PO report is sent after the CSI report, that is, the PO report is sent after the CSI report, and the PO report follows the CSI report.

[0011] In the above method, SRS resources and trigger states are bound together. The SRS resources used for phase offset (PO) measurement can be indicated by activating the trigger state via signaling. The activation indication method is simple and instructs the use of the port corresponding to the SRS resource for transmitting SRS and receiving CSI-RS, thereby ensuring consistency between uplink and downlink. That is, the terminal device uses the same port (i.e., the port for transmitting SRS) for both uplink signal reception (i.e., receiving CSI-RS) and downlink signal transmission (i.e., transmitting SRS), improving the accuracy of PO measurement.

[0012] In one possible implementation of the first aspect, the method further includes:

[0013] Send at least two second signaling messages, wherein the at least two second signaling messages are used to activate at least two trigger states respectively, the at least two trigger states respectively correspond to an SRS resource, and the SRS resource includes an SRS and the port corresponding to the SRS;

[0014] Receive at least two SRSs, wherein the at least two SRSs are sent by the terminal device through the port corresponding to the SRS respectively;

[0015] The first SRS is determined from the at least two SRSs, wherein the first SRS is a reference signal resource among the at least two SRSs whose channel quality is greater than a preset threshold.

[0016] In the above method, the terminal device has multiple ports, each of which can be used to transmit SRS. Therefore, the network side can evaluate the uplink channel quality among the multiple SRS ports (ports used to transmit SRS) and select the optimal port for PO measurement and calibration. That is, the SRS used for PO measurement and calibration is transmitted through the selected port. This port selection method can increase the system's adaptability to dynamic channel changes, which helps to achieve higher-precision phase calibration and joint precoding control in cooperative joint transmission systems, thereby improving system performance and robustness.

[0017] In one possible implementation of the first aspect, the method further includes:

[0018] Send report configuration information to the terminal device, wherein the report configuration information indicates N SRS resources corresponding to N trigger states, the at least two trigger states belong to the N trigger states, and the SRS resources belong to the N SRS resources.

[0019] For example, the report configuration information can be CSI report configuration.

[0020] In the above method, by configuring a single CSI report and combining it with multiple trigger states, the use of multiple SRS resources can be flexibly controlled. That is, each trigger state is bound to or corresponds to one SRS resource, and dynamic switching of the measurement link can be achieved by activating different trigger states. This method eliminates the need for separate CSI report configurations for each SRS resource; only a single CSI report configuration is required. Furthermore, different SRS resources can be distinguished and managed through multiple trigger states, reducing the complexity of CSI report configuration and system overhead while achieving PO measurement.

[0021] In one possible implementation of the first aspect, the method further includes:

[0022] The first uplink channel measurement result and a first identifier are sent to the second network element. The first identifier is used to indicate that the first uplink channel measurement result is the measurement result of the SRS sent by the first port. The first uplink channel measurement result and the second uplink channel measurement result are used to determine the uplink phase offset. The second uplink channel measurement result is the result obtained by the second network element after measuring the first SRS.

[0023] For example, all coordinating TRPs can share this set of trigger states and maintain a consistent understanding of the behavior of each trigger state. That is, all coordinating TRPs know that the report configuration information indicates that at least two of the N SRS resources corresponding to the N trigger states belong to the N trigger states, and the SRS resources belong to the N SRS resources. Thus, after receiving the first identifier and the first uplink channel measurement result, the second network element can determine the activated trigger state as the first trigger state based on the first identifier. Therefore, it can determine that the SRS currently performing the PO measurement is the SRS corresponding to the first trigger state, and further determine that the channel state information is that of the SRS. In this way, the second network element can perform PO estimation and calibration in conjunction with the downlink phase offset and uplink phase offset reported by the terminal device.

[0024] Secondly, embodiments of this application provide a communication method applicable to a terminal-side device. This terminal-side device can be a terminal equipment, a component applied within the terminal equipment (e.g., a processor, chip, circuit, or chip system), or a logic module or software capable of implementing all or part of the terminal equipment's functions. The method includes:

[0025] Receive a first signaling, wherein the first signaling is used to activate a first trigger state, the first trigger state corresponds to a first probe reference signal (SRS) resource, and the first probe reference signal (SRS) resource includes a first SRS and a first port corresponding to the first SRS;

[0026] The first SRS is sent through the first port, wherein the first SRS is used to determine the uplink channel measurement result, the first uplink measurement result and the second uplink measurement result are used to determine the uplink phase offset, and the second uplink measurement result is the result obtained by the second network element after measuring the first SRS;

[0027] At least one Channel State Information Reference Signal (CSI-RS) is received through the first port, wherein the at least one Channel State Information Reference Signal (CSI-RS) is used to determine downlink channel measurement results, the downlink channel measurement results are used to determine downlink phase offset, and the downlink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the downlink direction;

[0028] Send the downlink phase offset.

[0029] In one possible implementation of the second aspect, the method further includes:

[0030] Receive at least two second signaling messages, wherein the at least two second signaling messages are used to activate at least two trigger states respectively, the at least two trigger states respectively correspond to an SRS resource, and the SRS resource includes an SRS and the port corresponding to the SRS;

[0031] At least two SRSs are transmitted through the port respectively, wherein the at least two SRSs are used to determine the first SRS, wherein the first SRS is a reference signal resource among the at least two SRSs whose channel quality is greater than a preset threshold.

[0032] In one possible implementation of the second aspect, the method further includes:

[0033] Receive report configuration information, wherein the report configuration information indicates N SRS resources corresponding to N trigger states, the at least two trigger states belong to the N trigger states, and the SRS resources belong to the N SRS resources.

[0034] For the technical effects of the second aspect or possible implementation, please refer to the introduction of the technical effects of the first aspect or corresponding implementation.

[0035] Thirdly, embodiments of this application provide a communication system, the communication system including a terminal device, a first network element and a second network element, the first network element being a reference TRP in the cooperative joint transmission system, and the second network element including a cooperative TRP in the cooperative joint transmission system;

[0036] The first network element is used to send a first signaling to the terminal device, wherein the first signaling is used to activate a first trigger state, the first trigger state corresponds to a first probe reference signal (SRS) resource, and the SRS resource includes a first SRS and a first port corresponding to the first SRS;

[0037] The terminal device is configured to send the first SRS through the first port. The first SRS is used to determine the first uplink channel measurement result. The first uplink channel measurement result is used to determine the uplink phase offset. The uplink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the uplink direction.

[0038] The first network element is configured to send a first CSI-RS to the terminal device, wherein the first CSI-RS is configured to determine a first downlink channel measurement result, the first downlink channel measurement result is configured to determine a downlink phase offset, and the downlink phase offset is configured to indicate the phase offset of the second network element relative to the first network element in the downlink direction;

[0039] The terminal device is configured to send the downlink phase offset to the second network element. In one possible implementation of the third aspect, the second network element is configured to measure the first SRS to obtain a second uplink channel measurement result;

[0040] The first network element is used to send the first uplink channel measurement result and the first identifier to the second network element. The first identifier is used to indicate that the first uplink channel measurement result is the measurement result of the first SRS sent by the first port.

[0041] The second network element is used to determine the uplink phase offset based on the first uplink channel measurement result and the second uplink channel measurement result.

[0042] In one possible implementation of the third aspect, the second network element is used to send a second CSI-RS to the terminal device;

[0043] The terminal device is configured to receive the second CSI-RS through the first port, wherein the second CSI-RS is used to determine the second downlink channel measurement result, and the first downlink channel measurement result and the second downlink channel measurement result are used to determine the downlink phase offset.

[0044] For information on the technical effects of the third aspect or possible implementation, please refer to the description of the technical effects of the first aspect or corresponding implementation.

[0045] Fourthly, embodiments of this application provide a communication device, which can be a network device (such as a first network element), a component in a network device (e.g., a processor, chip, circuit, or chip system), or a logic module or software capable of implementing all or part of the functions of a network device.

[0046] In one possible implementation, the communication device may include modules, units, or means that correspond one-to-one with the methods / operations / steps / actions described in the second aspect. These modules, units, or means may be hardware circuits, software, or a combination of hardware circuits and software.

[0047] In one possible implementation, the communication device includes a processing unit and a transceiver unit. The processing unit is used to generate a first signaling, and the transceiver unit is used to transmit the first signaling. The first signaling is used to activate a first trigger state and indicate that the port used by the received channel state information reference signal CSI-RS is the same as the port corresponding to the first trigger state. The first trigger state corresponds to a first probe reference signal SRS resource, and the SRS resource includes a first SRS and a first port corresponding to the first SRS.

[0048] The transceiver unit is used to receive the first SRS, wherein the first SRS is sent by the terminal device through the first port, and the SRS is used to determine the first uplink channel measurement result;

[0049] The processing unit is used to generate a first CSI-RS, and the transceiver unit is used to transmit a first channel state information reference signal CSI-RS. The terminal device receives the first CSI-RS through the first port, and the first CSI-RS is used to determine a first downlink channel measurement result.

[0050] The transceiver unit is used to receive the first downlink channel measurement result, wherein the first downlink channel measurement result and the first uplink channel measurement result are used to determine the first phase offset, and the first phase offset is used to perform phase calibration on the first transmitted signal.

[0051] Fifthly, embodiments of this application provide a communication device, which may be a terminal device, a component in the terminal device (e.g., a processor, chip, circuit, or chip system), or a logic module or software capable of implementing all or part of the functions of the terminal device.

[0052] In one possible implementation, the communication device may include modules, units, or means that correspond one-to-one with the methods / operations / steps / actions described in the first aspect. These modules, units, or means may be hardware circuits, software, or a combination of hardware circuits and software.

[0053] In one possible implementation, the communication device includes a processing unit and a transceiver unit, the transceiver unit being used to receive a first signaling, wherein the first signaling is used to activate a first trigger state, the first trigger state corresponding to a first probe reference signal (SRS) resource, the SRS resource including a first SRS and a first port corresponding to the first SRS;

[0054] The processing unit is used to generate a first SRS, and the transceiver unit is used to transmit the first SRS through the first port, wherein the first SRS is used to determine the uplink channel measurement result;

[0055] The transceiver unit is used to receive at least one Channel State Information Reference Signal (CSI-RS) through the first port, wherein at least one CSI-RS is used to determine downlink channel measurement results;

[0056] The processing unit is used to generate downlink channel measurement results, and the transceiver unit is used to transmit the downlink channel measurement results. The downlink channel measurement results and the uplink channel measurement results are used to determine the phase offset, and the phase offset is used to perform phase calibration on the transmitted signal.

[0057] In a sixth aspect, embodiments of this application provide a communication device including at least one processor, which is configured to invoke a computer program or instructions to execute the method described in the first aspect or a possible implementation thereof.

[0058] In one possible implementation, the communication device also includes a memory and a communication interface. Optionally, the memory and processor are integrated together.

[0059] In one possible implementation, the memory is located outside the communication device.

[0060] In a seventh aspect, embodiments of this application provide a communication device including at least one processor, which is configured to invoke a computer program or instructions to perform the methods described in the second aspect or possible implementations thereof.

[0061] In one possible implementation, the communication device also includes a memory and a communication interface. Optionally, the memory and processor are integrated together.

[0062] In one possible implementation, the memory is located outside the communication device.

[0063] Eighthly, embodiments of this application provide a chip device including at least one processor, the at least one processor being configured to invoke computer programs or instructions to implement any of the above aspects or possible implementations of any of the above aspects.

[0064] In one possible implementation, the input of the chip device corresponds to the receiving operation in any of the above-mentioned aspects or possible implementations, and the output of the chip device corresponds to the transmitting operation in any of the above-mentioned aspects or possible implementations.

[0065] Optionally, the processor is coupled to the memory via an interface.

[0066] Optionally, the chip device may also include a memory in which computer programs or instructions are stored.

[0067] Ninthly, embodiments of this application provide a computer-readable storage medium storing a computer program or instructions that, when executed on a processor, implement the methods described above.

[0068] In a tenth aspect, embodiments of this application provide a computer program product that includes a computer program or instructions that, when executed on a processor, implement the method described in any of the above aspects.

[0069] Eleventhly, embodiments of this application provide a communication system, which includes: the apparatus as described in the sixth aspect and the apparatus as described in the seventh aspect. Attached Figure Description

[0070] The accompanying drawings used in the embodiments of this application are described below.

[0071] Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application;

[0072] Figure 2 This is a schematic diagram of the architecture of another communication system provided in the embodiments of this application;

[0073] Figure 3 This is a schematic diagram illustrating the configuration of CSI-RS and SRS ports in a CSI report configuration according to an embodiment of this application;

[0074] Figure 4 This is a signaling interaction diagram of a phase offset determination method provided in an embodiment of this application;

[0075] Figure 5 This is a schematic diagram illustrating the binding of a trigger state with an SRS resource, as provided in an embodiment of this application.

[0076] Figure 6 An exemplary flowchart of a method for determining phase offset is shown;

[0077] Figure 7 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0078] Figure 8 This is a schematic diagram of the structure of another communication device provided in the embodiments of this application. Detailed Implementation

[0079] The terms "system" and "network" in this application are used interchangeably. Unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship; for example, A / B can mean A or B. "And / or" in this application merely describes the relationship between the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be one or more. Furthermore, to facilitate a clear description of the technical solution of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish between network elements and similar items with essentially the same function. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" are not necessarily different.

[0080] References such as "in one implementation," "exemplarily," or "in one implementation" as described in this application mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0081] In this application, the terms "information," "signal," "message," "channel," and "singaling" may sometimes be used interchangeably. It should be noted that, without emphasizing their distinction, their intended meanings are consistent. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing their distinction, their intended meanings are consistent. Furthermore, the " / " mentioned in this application can be used to indicate an "or" relationship.

[0082] It is understood that in this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information to indicate A, it can be understood that the instruction information carries A, directly indicates A, or indirectly indicates A.

[0083] In this application, the information indicated by the instruction information is called the information to be instructed. In specific implementations, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index; or indirectly indicating the information to be instructed by indicating other information, where there is a relationship between the other information and the information to be instructed; or indicating only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various pieces of information, thereby reducing instruction overhead to some extent.

[0084] The information to be instructed can be sent as a whole or divided into multiple sub-information messages, and the sending period and / or timing of these sub-information messages can be the same or different. This application does not limit the specific sending method. The sending period and / or timing of these sub-information messages can be predefined, for example, according to a protocol, or configured by the transmitting device by sending configuration information to the receiving device.

[0085] It is understood that "send" and "receive" in this application refer to the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which can include direct transmission via the air interface or indirect transmission via the air interface from other units or modules. "Receive information from YY" can be understood as the source of the information being YY, which can include direct reception from YY via the air interface or indirect reception from YY via the air interface from other units or modules. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface.

[0086] In other words, sending and receiving can occur between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via buses, wiring, or interfaces.

[0087] It is understandable that information may undergo necessary processing, such as encoding and modulation, between the source and destination, but the destination can understand the valid information from the source. Similar statements in this application can be interpreted in a similar way and will not be elaborated further.

[0088] The communication method provided in this application embodiment can be applied to the third-generation partnership program (3GPP). rd Cellular communication systems related to the Generation Partner Ship Project (3GPP), such as fourth-generation (4G) cellular communication systems. th Generation 5 (4G) communication systems, such as Long Term Evolution (LTE) communication systems, which can include LTE Frequency Division Duplex (FDD) and LTE Time Division Duplex (TDD) communication systems, can also be applied to 5G (4G) communication systems. th This application relates to generational (5G) communication systems, such as 5G New Radio (NR) communication systems, or various future communication systems and networks. The methods provided in this application can also be applied to Bluetooth systems, Wireless Fidelity (WiFi) systems, LoRa systems, or vehicle-to-everything (V2X) systems, communication systems supporting the integration of multiple wireless technologies, device-to-device (D2D) systems, vehicle-to-everything (V2X) communication systems, machine-to-machine (M2M) communication systems, machine-type communication (MTC) systems, and Internet of Things (IoT) communication systems or other communication systems. The methods provided in this application can also be applied to satellite communication systems, wherein the satellite communication system can be integrated with the above-mentioned communication systems. The wireless communication systems involved in this application also include, but are not limited to, wireless local area network (WLAN) systems and narrowband Internet of Things (NB-IoT) systems.

[0089] First, the communication system to which the technical solutions provided in the embodiments of this application are applicable will be illustrated by way of example.

[0090] Please see Figure 1 , Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application, such as... Figure 1 As shown, the communication system includes a terminal device 100 and a network device 200, and the terminal device 100 and the network device 200 can communicate and transmit data.

[0091] (1) Terminal equipment, also known as user equipment (UE), user unit, user station, mobile station (MS), remote station, mobile device, mobile terminal (MT), terminal, wireless communication equipment, etc., is a device that provides voice or data connectivity to users. Specifically, it includes devices that provide voice connectivity to users, devices that provide data connectivity to users, or devices that provide both voice and data connectivity to users. For example, it may include handheld devices with wireless connectivity or processing devices connected to a wireless modem. The terminal equipment can communicate with the core network via the radio access network (RAN), exchange voice or data with the RAN, or interact with the RAN for both voice and data. Terminal devices can be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, self-driving, remote medical surgery, smart grids, transportation safety, smart cities, or smart homes, etc. This application does not limit the specific technology or device form used in the terminal embodiments.

[0092] As an example and not a limitation, in the embodiments of this application, when the terminal device can be a wearable device, wearable devices can also be called wearable smart devices. Wearable devices are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, accessories, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined, wearable smart devices include those with comprehensive functions, large size, and the ability to achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those focused on a specific application function that require cooperation with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0093] It should be noted that, in the embodiments of this application, the device used to implement the functions of the terminal device can be the terminal device itself, or it can be any device capable of supporting the terminal device in implementing the functions, such as a chip system, hardware circuit, software module, or a hardware circuit plus a software module. This device can be installed in the terminal device or used in conjunction with the terminal device. In the embodiments of this application, the chip system can be composed of chips, or it can include chips and other discrete devices. In this embodiment, the terminal device is used as an example to illustrate the device used to implement the functions of the terminal device, and this does not constitute a limitation on the solutions of the embodiments of this application.

[0094] (2) A network device is a device deployed in a wireless access network to provide wireless communication functions for terminal devices. A network device may also be called a wireless access network (RAN) entity, access network equipment, wireless access network device, access node, wireless node, network node, or communication device, etc.

[0095] Network equipment includes, but is not limited to: evolved NodeB (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 NodeB, HNB), base band unit (BBU), access point (AP), relay station, macro base station, micro base station, wireless relay node, donor node or similar, or combinations thereof, in Wi-Fi systems; radio controller, wireless backhaul node, transmitting and receiving point (TRP), transmitting point (TP), master station, slave station, motorslide retainer (MSR) node, transmission node, or transceiver node in CRAN scenarios. Network equipment can also be access network equipment in 5G mobile communication systems. For example, a next-generation NodeB (gNB), TRP, TP in a New Radio (NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G mobile communication system. Alternatively, network equipment can also be a network node constituting a gNB or transmission point. For example, a central unit (CU), a distributed unit (DU), or a radio unit (RU). Network equipment can also be a baseband unit (BBU), a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). Network equipment can also refer to communication modules, modems, or chips installed within the aforementioned devices or apparatuses. Network equipment can also be a mobile switching center and equipment that performs base station functions in D2D, V2X, and M2M communications, network-side equipment in next-generation communication networks, and equipment that performs base station functions in future communication systems. Network equipment can support networks with the same or different access technologies. Network equipment can also be a server, wearable device, vehicle, or in-vehicle equipment. For example, in V2X technology, network devices can be roadside units (RSUs).

[0096] Please see Figure 2 , Figure 2 This is a schematic diagram of the architecture of another communication system provided in the embodiments of this application, such as... Figure 2 As shown, the communication system includes terminal equipment 100, a first network element 201, and a second network element 202. It is understood that... Figure 2 The communication system shown can include more network elements; this embodiment uses two network elements as an example. The first network element 201 and the second network element 202 can be Transmission Receiving Points (TRPs), which are devices or modules located on the network side of the communication system and have corresponding communication functions. That is, the first network element 201 and the second network element 202 can be considered as network devices 200 in the communication system.

[0097] In the Cooperative Joint Transmission (CJT) technology, the first network element 201 and the second network element 202 simultaneously send phase data streams to the terminal device 100. The first network element 201 and the second network element 202 need to control the phase of the transmitted signals so that these signals are phase synchronized at the receiving end of the terminal device 100, thereby enabling the signals sent by each network element to be coherently superimposed together, thus improving the strength of the received signal.

[0098] However, in practical deployments, such as in scenarios using non-ideal backhaul networks like the Internet Protocol-based Radio Access Network (RAN) (IPRAN), the various TRPs (e.g., the first network element 201 and the second network element 202) typically do not share a unified clock. That is, the first network element 201 and the second network element 202 may use their own local clock crystals. These crystals exhibit frequency offset and phase offset, causing misalignment of the symbol start times and slight differences in carrier frequencies between the signals transmitted by the first network element 201 and the second network element 202. When the signals transmitted by the first network element 201 and the second network element 202 reach the terminal device 100 after propagation, the originally designed phase relationship may be completely disordered, making coherent combining impossible. To improve the application of CJT in non-ideal backhaul networks, a feedback reporting mechanism on the terminal device side is introduced, such as a phase offset (PO) report. In this context, the Point of View (PO) report refers to the report sent by the terminal device to the network side regarding the relative phase difference between signals arriving from different Transmitter Points (TRPs), thus helping multiple TRPs pre-correct their transmitted signal phases. To ensure the accuracy of the PO report, the terminal device must use the same antenna port when receiving the Channel State Information Reference Signal (CSI-RS) and transmitting the Sounding Reference Signal (SRS) to ensure consistency in the reporting reference. Specifically, the terminal device sends the SRS to the network device, which receives it and measures it to obtain channel measurement results, which are then used for uplink scheduling. Similarly, the network device sends the CSI-RS to the terminal device, which receives it and measures it to obtain downlink channel information. The PO report can be a form of representation of this downlink channel information.

[0099] To ensure that the terminal device uses the same antenna port when receiving CSI-RS and transmitting SRS, a separate CSI report configuration is typically required for each CSI-RS and SRS port combination. That is, the network device needs to send a CSI report configuration to the terminal device. This CSI report configuration indicates the mapping between CSI-RS and SRS resources, where SRS resources include the port for transmitting SRS and the time-domain and frequency-domain mapping of SRS. Furthermore, this report configuration can indicate that the port for transmitting SRS should be used when receiving CSI-RS. If multiple mappings need to be configured, the network device needs to send multiple CSI report configurations. For example, please refer to [link to example]. Figure 3 , Figure 3 This is a schematic diagram illustrating the configuration of CSI-RS and SRS ports in a CSI report configuration, provided in an embodiment of this application. Figure 3 As can be seen, in order to configure N sets of correspondences, the network device needs to send N CSI report configurations to the terminal device, where N is an integer greater than or equal to 1. For example, CSI report configuration 1 indicates that the configured CSI-RS receiving port is the same as SRS port 1, and SRS port 1 is the port for sending SRS; CSI report configuration 2 indicates that the configured CSI-RS receiving port is the same as SRS port 2, and SRS port 2 is the port for sending SRS; ...; CSI report configuration N indicates that the configured CSI-RS receiving port is the same as SRS port N, and SRS port N is the port for sending SRS.

[0100] In scenarios involving multi-TRP collaborative deployment (i.e., scenarios using Collaborative Joint Transmission (CJT) technology), as the number of TRPs increases, the combination of CSI-RS and SRS ports also increases, since CSI-RS is sent to the terminal device by each TRP. Currently, the terminal device only supports a maximum of 48 CSI report configurations. The above approach will cause the CSI report configuration resource consumption to be too fast / large, the scheduling flexibility to be insufficient, and it will be detrimental to the scheduling of other services.

[0101] In view of this, this application provides a method and related apparatus for determining phase offset. In this method, the network side can display and instruct the terminal device to use the same SRS port during CSI-RS reception and SRS transmission, thereby ensuring uplink and downlink reference consistency and improving the accuracy of PO measurement.

[0102] It should be noted that the embodiments in this application are illustrated using network devices (including the first network element and the second network element) and terminal devices as examples of the execution entities, but this application does not limit the execution entities illustrated in the interaction. For example, the method executed by the network device in the embodiments of this application can also be implemented by modules (e.g., circuits, chips, or chip systems) in the network device, or by logical nodes, logical modules, or software that can implement all or part of the functions of the network device, or by circuits or chips (such as graphics processing units (GPUs), artificial intelligence (AI) processors, neural network processing units (NPUs), or application-specific integrated circuits (ASICs)) in the network device responsible for communication and / or computing functions. For example, the method executed by the terminal device in the embodiments of this application can also be implemented by modules (e.g., circuits, chips, or chip systems) in the terminal device, or by logical nodes, logical modules, or software that can implement all or part of the functions of the terminal device, or by circuits or chips (GPUs, AI processors, NPUs, ASICs) in the terminal device responsible for communication and / or computing functions. Please refer to [link to relevant documentation]. Figure 4 , Figure 4 This is a signaling interaction diagram illustrating a phase offset determination method provided in an embodiment of this application. Optionally, this method can be applied to a communication system, for example, to... Figure 1 or Figure 2 The communication system shown.

[0103] like Figure 4 The method shown may include steps S401-S403. It should be understood that, for ease of description, this application describes the steps in the order of S401-S405, but does not limit the execution to this order. This application's embodiments do not limit the order of execution, the execution time, or the number of executions of one or more of the above steps. Steps S401-S405 are as follows:

[0104] Step S401: The first network element sends a first signaling message to the terminal device. The first signaling message is used to activate the first trigger state and indicate that the port used for receiving the Channel State Information Reference Signal (CSI-RS) is the same as the port corresponding to the first trigger state. Accordingly, the terminal device receives the first signaling message.

[0105] For example, the first network element is the reference TRP in a multi-TRP collaborative deployment scenario. The reference TRP refers to a specific TRP selected as the benchmark and anchor point from a set of TRPs involved in collaborative transmission or reception. That is, the reference TRP is the core anchor point in this collaborative set, and other TRPs (usually called collaborative TRPs, such as the second network element in this embodiment) maintain synchronization and coordination with the reference TRP in terms of time, frequency, phase, and scheduling. The reference TRP is selected by the network from a set of collaboratively working TRPs based on preset optimization strategies (such as strongest signal, load balancing, service requirements, etc.) by collecting measurement information from terminal devices and TRPs.

[0106] In one possible implementation, as described in this application embodiment, the original purpose of the trigger state is extended to include SRS resource selection capabilities. The trigger state is a set of reporting configurations configured by the network side. When the network side sends a signaling message to trigger reporting, this signaling message can be downlink control information (DCI). That is, when the trigger state is activated by signaling, the terminal side can execute the reporting configuration associated with this trigger. In this application embodiment, this reporting configuration is the SRS and the corresponding port. Please refer to [link to relevant documentation]. Figure 5 , Figure 5 This is a schematic diagram illustrating the binding of a trigger state with SRS resources according to an embodiment of this application. In one implementation, the first network element sends a report configuration information to the terminal device. For example, the first network element can configure the terminal device via radio resource control (RRC) signaling. Figure 5 The CSI report configuration shown refers to the report configuration information, which indicates N SRS resources corresponding to N trigger states. In other words, a single CSI report configuration can configure the correspondence between N trigger states and N SRS resources, where N is a positive integer greater than 1. Each trigger state corresponds to one SRS resource (including the port for transmitting the SRS and the SRS mapping in the time and frequency domains), i.e., trigger state 1 corresponds to SRS resource 1, trigger state 2 corresponds to SRS resource 2, ..., trigger state N corresponds to SRS resource N. In this implementation, it is not necessary to configure a separate CSI report configuration for each SRS resource. A single CSI report configuration combined with multiple trigger states allows for the differentiation and management of different SRS resources. That is, when the network side activates a trigger state via signaling, it can activate the SRS resource corresponding to that trigger state, thereby instructing the terminal device to use the same port when receiving CSI-RS as when transmitting SRS, thus achieving dynamic switching of the measurement reference link.

[0107] In the multi-TRP collaborative deployment scenario (i.e., the scenario using collaborative joint transmission CJT technology), at least one collaborative TRP (i.e., the second network element) shares the CSI report configuration. That is, at least one collaborative TRP knows the correspondence between the configured N trigger states and N SRS resources, so that different TRPs can maintain the consistency between the port receiving CSI-RS and the port sending SRS, reduce configuration complexity and improve scheduling and adaptation capabilities.

[0108] For example, the first signaling is used to activate the first trigger state and indicate that the port used for receiving Channel State Information Reference Signal (CSI-RS) is the same as the port corresponding to the first trigger state. The first trigger state is a trigger state configured in the CSI report configuration. The first trigger state corresponds to SRS resources, which include a first SRS and a first port corresponding to the first SRS. That is, the first network element activates the first trigger state by sending the first signaling to the terminal device, thereby activating the SRS resources corresponding to the first trigger state, and thus instructing the terminal device to use the same port when sending CSI-RS as when sending SRS.

[0109] As examples, to dynamically adapt to channel conditions, before executing step S401, the first network element can select an optimal port from multiple SRS ports as the port for PO measurement and calibration. Exemplarily, the first network element periodically activates different trigger states by issuing signaling within a preset time period (e.g., within a certain evaluation window). That is, the first network element sends at least two second signaling messages, which are used to activate at least two trigger states respectively. Each of the at least two trigger states corresponds to an SRS resource, which includes the SRS and the corresponding port. The aforementioned signaling can be DCI signaling, and the at least two trigger states belong to the N trigger states configured in the aforementioned report configuration information. For example, please continue to see... Figure 5 At the first time, the first network element sends a DCI signaling to the terminal device to activate trigger state 1, and then the terminal device sends SRS-1 through SRS port 1; at the second time, the first network element sends a DCI signaling to the terminal device to activate trigger state 2, and then the terminal device sends SRS-2 through SRS port 2; ... at the Kth time, the first network element sends a DCI signaling to the terminal device to activate trigger state K, and then the terminal device sends SRS-K through SRS port 3, where K is a positive integer less than or equal to N.

[0110] Further, under the instruction of the first network element, the terminal device can transmit SRS through different ports (including ports corresponding to at least two SRSs). The first network element can receive at least two SRSs reported through each port, that is, at least two SRSs include those transmitted by the terminal device through the port corresponding to the SRS. Then, the first network element measures the at least two SRSs to obtain channel measurement results corresponding to the at least two SRSs, and determines the first SRS from the at least two SRSs based on the channel measurement results. The first SRS is the optimal SRS among the at least two SRSs, that is, the SRS with the best channel quality among the at least two SRSs, or the first SRS is a reference signal resource with channel quality greater than a preset threshold among the at least two SRSs. Thus, based on the selected optimal SRS (i.e., the first SRS), the optimal SRS port, i.e., the port that transmits the first SRS (the first port), can be determined. In the above example, the first network element can select the optimal port (i.e., the first port) for PO measurement and calibration by evaluating the uplink channel quality of multiple SRS ports. Furthermore, after determining the optimal port (i.e. the first port), the first network element executes step S402, which is to activate the trigger state corresponding to the port again by issuing a signaling message.

[0111] Step S402: The terminal device sends a first SRS to the first network element and the second network element through the first port. Correspondingly, the first network element and the second network element receive the first SRS.

[0112] For example, in response to the first signaling, the terminal device activates a first trigger state, and then activates the SRS resource corresponding to the first trigger state. The SRS resource includes a first SRS and a first port corresponding to the first SRS, allowing the terminal device to send the first SRS through the first port. The first port can be considered as the locked port during this PO adjustment process.

[0113] Understandably, the terminal device sends a first SRS to a first network element and a second network element through a first port. The first network element receives the first SRS and obtains a first uplink channel measurement result by measuring the first SRS. This first uplink channel measurement result is used to determine the uplink phase offset. Similarly, the second network element measures the SRS from the terminal device to obtain a second uplink channel measurement result. Furthermore, the first and second uplink channel measurement results are used to determine the uplink phase offset.

[0114] Among them, the channel measurement results include, but are not limited to: channel response, reference signal received power (RSRP), signal to interference plus noise ratio (SINR), uplink timing advance (TA), and angle of arrival (AoA).

[0115] Step S403: The terminal device receives CSI-RS from the first network element and the second network element respectively through the first port. Correspondingly, the first network element and the second network element send CSI-RS to the terminal device respectively.

[0116] For example, after the terminal device locks / determines / configures / selects the first port, the first network element can send the first CSI-RS to the terminal device in accordance with the measurement requirements of coherent joint transmission with co-phase (feedback) (CJTC-P).

[0117] Furthermore, in a multi-TRP collaborative deployment scenario, the coordinating TRP, i.e., the second network element, can send a second CSI-RS to the terminal device according to the measurement requirements of CJTC-P. In this way, the terminal device can receive CSI-RS (including the CSI-RS of the first network element and the CSI-RS of the second network element) from different network elements (TRPs) through the first port. It is understood that after the terminal device selects the first port, all TRPs (including the first and second network elements) in the multi-TRP collaborative deployment scenario simultaneously send CSI-RS to the terminal device, and any two of the aforementioned CSI-RS have the same phase.

[0118] The measurement requirement of CJTC-P refers to the network side configuring multiple cooperating TRPs to send CSI-RS to the target terminal on the same time-frequency resources. These CSI-RS from different TRPs are synchronized in time and / or frequency, and the CSI-RS resources of each TRP may have different specific configurations, such as different numbers of ports, densities, etc.

[0119] Step S404: The terminal device sends the downlink phase offset to the first network element and the second network element respectively. Correspondingly, the first network element and the second network element receive the downlink channel measurement results.

[0120] For example, the terminal device receives CSI-RS from different network elements (i.e., TRPs) in a multi-TRP collaborative deployment scenario through a first port, specifically receiving the first CSI-RS from the first network element and the second CSI-RS from the second network element. Then, the terminal device obtains downlink channel measurement results corresponding to multiple CSI-RS by measuring the CSI-RS from different network elements, namely the first downlink channel measurement result from the first network element and the second downlink channel measurement result from the second network element. The terminal device then sends the corresponding downlink channel measurement results to the first and second network elements via CSI reports. Upon receiving the CSI report, the second network element can determine the downlink phase offset based on the first and second downlink channel measurement results carried in the report. Alternatively, the terminal device determines the downlink phase offset based on the second and first downlink channel measurement results of the second network element and sends the downlink phase offset to the second network element via PO reports. It is understood that the phase deviation of different second network elements relative to the first network element is different, so the downlink phase offset carried in the PO reports sent to different second network elements may be different. The downlink channel measurement results include, but are not limited to: rank indicator (RI), precoding matrix indicator (PMI), channel quality indicator (CQI), RSRP and SINR, etc. Optionally, the first CSI report may also include: RI, PMI, CQI, etc.

[0121] As examples, the terminal device sends the measured relative phase difference information (including the relative phase deviation between signals from different network elements when they arrive at the terminal device) to the second network element via a PO report. That is, the PO report includes relative phase difference information. This relative phase difference information includes the downlink phase offset mentioned above. By comparing the arrival phases of signals from different network elements, the terminal device can calculate the relative phase deviation between signals from different network elements when they arrive at the terminal device, for example, the phase difference between the signal from the first network element and the signal from one of the second network elements.

[0122] Step S405: The second network element estimates and calibrates the phase offset based on the downlink phase offset and the uplink phase offset.

[0123] Step S405 is an optional step.

[0124] As examples, for phase offset estimation and calibration, after the first network element receives the first SRS in step S402 and obtains the first uplink channel measurement result, it sends the first uplink channel measurement result and a first identifier to the second network element. The first identifier indicates a first trigger state, thereby indicating to the second network element the SRS resources used for PO estimation and calibration. The SRS resources include the first SRS and the first port corresponding to the first SRS. That is, the first identifier indicates that the first uplink channel measurement result is the measurement result of the SRS transmitted through the first port. The coordinated TPR included in the second network element can determine the channel measurement result of the first SRS transmitted through the first port based on the first uplink channel measurement result and the first identifier. Therefore, the second network element can determine the uplink phase offset based on the first uplink channel measurement result and the second uplink channel measurement result. This uplink phase offset indicates the phase offset of the second network element relative to the first network element in the uplink direction, that is, the phase difference between the second signal received by the second network element from the terminal device and the first signal, relative to the first signal received by the first network element from the terminal device.

[0125] As another example, in a multi-TRP collaborative deployment scenario, different collaborative network elements (i.e., the second network element) predict the downlink phase offset based on the uplink phase offset using channel reciprocity. Based on the predicted downlink phase offset, the transmitted downlink data signal is phase-compensated, thereby compensating for the deviation between the fixed phase offset introduced by the transceiver hardware of the second network element and the fixed phase offset of the first network element. This allows the compensated signal transmitted by the second network element and the signal transmitted by the first network element to be coherently superimposed on the terminal device side.

[0126] As another example, the second network element receives the downlink phase offset sent from the terminal device and compares it with the downlink phase offset previously predicted through uplink reciprocity. If a discrepancy exists, it indicates an error in the channel reciprocity assumption, and a calibration coefficient can be calculated to correct the reciprocity error. Furthermore, in subsequent cooperative transmissions, the calibrated prediction value can be used for phase pre-compensation.

[0127] In summary, in a multi-TRP collaborative deployment scenario, network elements can compensate for their own phase offset before sending signals, enabling these signals to achieve phase synchronization at the receiving end of the terminal device. This allows the signals sent by each network element to be coherently superimposed, thereby improving the strength of the received signal.

[0128] In one possible implementation, Figure 6 An exemplary flowchart illustrates a method for determining phase offset, which can be applied to... Figure 2 Communication system, Figure 2 The network elements in the communication system shown can perform the following operations:

[0129] Step S1: The first network element 201 sends an RRC signaling message to the terminal device 100. The RRC signaling message is used to instruct the reporting of configuration information.

[0130] Step S2: The first network element 201 sends at least two second signaling messages to the terminal device 100.

[0131] For example, the first network element 201 polls for SRS resources by sending signaling. At least two second signaling commands are used to activate at least two trigger states, each corresponding to an SRS resource. The first SRS resource includes the SRS and the port corresponding to the first SRS.

[0132] Step S3: First network element 201 selects the first port.

[0133] Step S4: The first network element 201 is used to send a first signaling to the terminal device 100. The first signaling is used to activate the first trigger state.

[0134] The first trigger state corresponds to the first detection reference signal (SRS) resource, which includes the first SRS and the first port corresponding to the first SRS.

[0135] Step S5: Terminal device 100 sends the first SRS to the first network element 201 and the second network element 202 through the first port.

[0136] For example, the first network element 201 receives the first SRS and measures the first SRS to obtain the first uplink channel measurement result.

[0137] For example, the second network element 202 receives the first SRS and measures the first SRS to obtain the second uplink channel measurement result.

[0138] Step S6: The first network element 201 and the second network element 202 respectively send CSI-RS to the terminal device 100, wherein the CSI-RS is used to determine the downlink channel measurement results.

[0139] For example, a first network element 201 sends a first CSI-RS to a terminal device 100, and the terminal device 100 receives the first CSI-RS through a first port. The first CSI-RS is used to determine a first downlink channel measurement result. A second network element 202 sends a second CSI-RS to the terminal device 100, and the terminal device 100 receives the second CSI-RS through a second port. The second CSI-RS is used to determine a second downlink channel measurement result. The first downlink channel measurement result and the second downlink channel measurement result are used to determine the downlink phase offset.

[0140] Step S7: The first network element 201 sends the first uplink channel measurement result and the first identifier to the second network element 202.

[0141] The first identifier is used to indicate that the first uplink channel measurement result is the measurement result of the first SRS sent by the first port.

[0142] For example, the second network element 202 determines the uplink phase offset based on the first uplink channel measurement result and the second uplink channel measurement result.

[0143] Step S8: Terminal device 100 sends downlink phase offset to second network element 202.

[0144] Step S9: The second network element 202 estimates and calibrates the phase offset.

[0145] For example, the second network element 202 estimates the downlink phase offset using channel reciprocity based on the uplink phase offset, compares the received downlink phase offset with the previously estimated downlink phase offset, and calculates a calibration coefficient to correct the reciprocity error if there is a deviation.

[0146] It should be understood that the steps in the above-described method embodiments provided in this application can be implemented by integrated logic circuits in the processor hardware or by instructions in software form. The method steps disclosed in the embodiments of this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

[0147] This application divides the communication device into functional modules according to the above-described method embodiments. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated modules can be implemented in hardware or as software functional modules. It should be noted that the module division in this application is illustrative and represents only one logical functional division; other division methods may be used in actual implementation. The following will combine... Figure 7 and Figure 8 The communication device of the embodiments of this application is described in detail.

[0148] Figure 7 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application, such as... Figure 7As shown, the communication device 70 includes a processing module 701 and a transceiver module 702. The transceiver module 702 can implement corresponding communication functions; for example, the transceiver module 702 can also be called an interface, communication interface, or communication module. The processing module 701 is used for data processing, such as generating information. The transceiver module 702 can have its own control logic or can perform corresponding operations under the control of the processing module 701. In some embodiments of this application, the communication device 70 can be used to perform the actions performed by the sending end in the above method embodiments. For example, the sending end can be the device itself or a chip or functional module configurable in the device. The transceiver module 702 is used to perform operations related to information transmission and reception in the above method embodiments, and the processing module 701 is used to perform operations related to data processing in the above method embodiments. The processing module 701 can perform corresponding operations by calling a computer program or by performing corresponding operations through corresponding hardware circuits. The transceiver module 702 can perform transmission and reception operations independently or perform corresponding transmission and reception operations under the control of the processing module 701.

[0149] For example, Figure 7 The communication device 70 shown can be a first network element or a device within the first network element. The processing module 701 and the transceiver module 702 in the communication device 70 can respectively perform the following operations:

[0150] Processing module 701 is used to generate the first signaling;

[0151] The transceiver module 702 is used to send a first signaling, wherein the first signaling is used to activate a first trigger state and indicate that the port used by the received channel state information reference signal CSI-RS is the same as the port corresponding to the first trigger state. The first trigger state corresponds to a first probe reference signal SRS resource, and the first SRS resource includes the first SRS and the first port corresponding to the first SRS.

[0152] The transceiver module 702 is used to receive a first SRS, wherein the first SRS is sent by the terminal device through the first port, the first SRS is used to determine the first uplink channel measurement result, the first uplink channel measurement result is used to determine the uplink phase offset, the uplink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the uplink direction, and the second network element includes the cooperative TRP in the cooperative joint transmission system;

[0153] Processing module 701 is used to generate the first channel state information reference signal CSI-RS;

[0154] The transceiver module 702 is used to transmit a first channel state information reference signal (CSI-RS). The terminal device receives the first CSI-RS through a first port. The first CSI-RS is used to determine a first downlink channel measurement result. The first downlink channel measurement result is used to determine the downlink phase offset. The downlink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the downlink direction.

[0155] In one possible implementation, the processing module 701 is used to generate at least two second signaling messages, wherein the at least two second signaling messages are used to activate at least two trigger states respectively, and the at least two trigger states respectively correspond to an SRS resource, the SRS resource including the SRS and the port corresponding to the SRS; the transceiver module 702 is used to send at least two second signaling messages;

[0156] The transceiver module 702 is used to receive at least two SRSs, wherein the at least two SRSs are sent by the terminal device through the port corresponding to the SRS respectively;

[0157] The processing module 701 is used to determine a first SRS from at least two SRSs, wherein the first SRS is a reference signal resource among at least two SRSs whose channel quality is greater than a preset threshold.

[0158] In one possible implementation, the processing module 701 is used to generate report configuration information, and the transceiver module 702 is used to send the report configuration information to the terminal device. The report configuration information indicates N SRS resources corresponding to N trigger states, at least two trigger states belong to N trigger states, and the SRS resources belong to N SRS resources.

[0159] In one possible implementation, the transceiver module 702 is used to send a first uplink channel measurement result and a first identifier to the second network element. The first identifier is used to indicate that the first uplink channel measurement result is the measurement result of the first SRS sent by the first port. The first uplink channel measurement result and the second uplink channel measurement result are used to determine the uplink phase offset. The second uplink channel measurement result is the result obtained by the second network element after measuring the first SRS.

[0160] Reuse Figure 7 In other embodiments of this application, exemplarily, Figure 7 The communication device 70 shown can be a terminal device or a component of a terminal device. The processing module 701 and the transceiver module 702 in the communication device 70 can respectively perform the following operations:

[0161] The transceiver module 702 is used to receive a first signaling, wherein the first signaling is used to activate a first trigger state, the first trigger state corresponds to a first detection reference signal (SRS) resource, and the first SRS resource includes a first SRS and a first port corresponding to the first SRS.

[0162] The processing module 701 is used to generate a first SRS, and the transceiver module 702 is used to transmit the first SRS through a first port. The first SRS is used to determine the uplink channel measurement result, the uplink channel measurement result is used to determine the uplink phase offset, and the uplink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the uplink direction. The first network element is the reference transmission receiver point (TRP) in the cooperative joint transmission system, and the second network element includes the cooperative TRP in the cooperative joint transmission system.

[0163] The transceiver module 702 is used to determine downlink channel measurement results through at least one channel state information reference signal (CSI-RS) via the first port, wherein at least one CSI-RS is used to determine downlink channel measurement results, downlink channel measurement results are used to determine downlink phase offset, and downlink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the downlink direction.

[0164] The processing module 701 is used to generate the downlink phase offset, and the transceiver module 702 is used to transmit the downlink phase offset.

[0165] In one possible implementation, the transceiver module 702 is used to receive at least two second signaling messages, wherein the at least two second signaling messages are used to activate at least two trigger states respectively, and the at least two trigger states respectively correspond to an SRS resource, the SRS resource including the SRS and the port corresponding to the SRS;

[0166] The processing module 701 is used to generate at least two SRSs, and the transceiver module 702 is used to transmit at least two SRSs through at least two ports respectively. The at least two SRSs are used to determine the first SRS, wherein the first SRS is a reference signal resource among the at least two SRSs whose channel quality is greater than a preset threshold.

[0167] In one possible implementation, the transceiver module 702 is used to receive report configuration information, wherein the report configuration information indicates N SRS resources corresponding to N trigger states, at least two trigger states belong to N trigger states, and the SRS resources belong to N SRS resources.

[0168] In one possible implementation, transceiver module 702 is configured to receive at least one CSI-RS via a first port, wherein the at least one CSI-RS is configured to determine a first CSI report.

[0169] The specific descriptions of the transceiver module and processing module shown in the above embodiments are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments, which will not be described in detail here.

[0170] The communication device according to the embodiments of this application has been described above. The following describes the possible product forms of the communication device. Any device possessing the above-described... Figure 7 Any form of the communication device 70 that performs the functions described herein falls within the protection scope of the embodiments of this application.

[0171] The following description is merely an example and does not limit the product form of the communication device in the embodiments of this application to this.

[0172] In one possible implementation, Figure 7 In the communication device 70 shown, the processing module 701 can be one or more processors, and the transceiver module 702 can be a transceiver, or the transceiver module 702 can also be a transmitting module and a receiving module. The transmitting module can be a transmitter, and the receiving module can be a receiver. The transmitting module and the receiving module are integrated into one device, such as a transceiver. In the embodiments of this application, the processor and the transceiver can be coupled, etc., and the connection method between the processor and the transceiver is not limited in the embodiments of this application. In the process of executing the above method, the process of sending information in the above method can be the process of the processor outputting the above information. When outputting the above information, the processor outputs the above information to the transceiver so that the transceiver can transmit it. After the above information is output by the processor, it may need to undergo other processing before reaching the transceiver. Similarly, the process of receiving information in the above method can be the process of the processor receiving the input above information. When the processor receives the input information, the transceiver receives the above information and inputs it into the processor. In addition, after the transceiver receives the above information, the above information may need to undergo other processing before being input into the processor.

[0173] like Figure 8 As shown, Figure 8 This is a schematic diagram of another communication device provided in an embodiment of this application. The communication device 80 includes one or more processors 820 and a transceiver 810. Exemplarily, the transceiver 810 is used to perform actions such as... Figure 7 The transceiver module 702 shown implements the functions or steps, and the processor 820 is used to execute such functions or steps. Figure 7 The processing module 701 shown implements the functions or steps. The transceiver 810 may have its own processing logic, or it may execute related operations under the control of the processor 820. Optionally, the communication device 80 may also include a memory 830, which can store computer programs. The processor 820 performs operations by calling the computer programs in the memory 830, such as generating the first signaling message, or generating the first SRS, etc. For detailed descriptions of the processor 820 and transceiver 810, please refer to... Figure 6Alternatively, the method embodiments shown above will not be described in detail here. For explanations of relevant steps and information in the above embodiments, please refer to the descriptions in the above method embodiments; they will not be detailed here. Figure 8 In various implementations of the communication apparatus shown, the transceiver may include a receiver for performing a receiving function (or operation) and a transmitter for performing a transmitting function (or operation). The transceiver is also used to communicate with other devices / appliances via a transmission medium.

[0174] Optionally, the communication device 80 may be a chip or an integrated circuit in its specific implementation.

[0175] This application also provides a chip system, which includes at least one processor for implementing the functions involved in the method executed by the first network element or terminal device in any of the above embodiments.

[0176] In one possible design, the chip system further includes a memory for storing program instructions and data, which may be located within or outside the processor.

[0177] The chip system can consist of chips or include chips and other discrete components.

[0178] Optionally, the chip system may contain one or more processors. These processors can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, an integrated circuit, etc. When implemented in software, the processor can be a general-purpose processor, implemented by reading software code stored in memory.

[0179] Optionally, the chip system may contain one or more memories. The memory may be integrated with the processor or disposed separately from it; this application embodiment does not limit this. For example, the memory may be a non-transient processor, such as a read-only memory (ROM), which may be integrated with the processor on the same chip or disposed separately on different chips. This application embodiment does not specifically limit the type of memory or the arrangement of the memory and processor.

[0180] For example, the chip system may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a micro controller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0181] This application also provides a computer program product, which includes a computer program (also referred to as code or instructions) that, when run, causes a computer to execute the method executed by the first network element or terminal device in any of the above embodiments.

[0182] This application also provides a computer-readable storage medium storing a computer program (also referred to as code or instructions). When the computer program is run, it causes a computer to perform the method executed by the communication node, access network device, or core network device in any of the above embodiments.

[0183] The various embodiments of this application can be combined arbitrarily to achieve different technical effects.

[0184] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both types of storage media.

[0185] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0186] In the description of this application, terms such as “first,” “second,” “S401,” or “S402” are used only for the purpose of distinguishing descriptions and for the convenience of context. The different sequence numbers themselves do not have specific technical meanings and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying the order of execution of operations. The order of execution of each process should be determined by its function and internal logic.

Claims

1. A method for determining phase offset, characterized in that, The method is applied to a first network element, which is a reference transmission receiving point (TRP) in a cooperative joint transmission system. The method includes: Send a first signaling, wherein the first signaling is used to activate a first trigger state and indicate that the port used by the Receive Channel State Information Reference Signal (CSI-RS) is the same as the port corresponding to the first trigger state, the first trigger state corresponds to a first Probe Reference Signal (SRS) resource, and the first Probe Reference Signal (SRS) resource includes a first SRS and a first port corresponding to the first SRS. The first SRS is received, wherein the first SRS is sent by the terminal device through the first port, the first SRS is used to determine the first uplink channel measurement result, the first uplink channel measurement result is used to determine the uplink phase offset, the uplink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the uplink direction, and the second network element includes the cooperative TRP in the cooperative joint transmission system; The terminal device receives the first CSI-RS through the first port. The first CSI-RS is used to determine a first downlink channel measurement result. The first downlink channel measurement result is used to determine a downlink phase offset. The downlink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the downlink direction.

2. The method according to claim 1, characterized in that, The method further includes: Send at least two second signaling messages, wherein the at least two second signaling messages are used to activate at least two trigger states respectively, the at least two trigger states respectively correspond to an SRS resource, and the SRS resource includes an SRS and the port corresponding to the SRS; Receive at least two SRSs, wherein the at least two SRSs are sent by the terminal device through the port corresponding to the SRS respectively; The first SRS is determined from the at least two SRSs, wherein the first SRS is a reference signal resource among the at least two SRSs whose channel quality is greater than a preset threshold.

3. The method according to claim 2, characterized in that, The method further includes: Send report configuration information to the terminal device, wherein the report configuration information indicates N SRS resources corresponding to N trigger states, the at least two trigger states belong to the N trigger states, and the SRS resources belong to the N SRS resources.

4. The method according to any one of claims 1 to 3, characterized in that, The method further includes: The first uplink channel measurement result and a first identifier are sent to the second network element. The first identifier is used to indicate that the first uplink channel measurement result is the measurement result of the first SRS sent by the first port. The first uplink channel measurement result and the second uplink channel measurement result are used to determine the uplink phase offset. The second uplink channel measurement result is the result obtained by the second network element after measuring the first SRS.

5. A method for determining phase offset, characterized in that, The method is applied to a terminal device, and the method includes: Receive a first signaling, wherein the first signaling is used to activate a first trigger state, the first trigger state corresponds to a first probe reference signal (SRS) resource, and the first probe reference signal (SRS) resource includes a first SRS and a first port corresponding to the first SRS; The first SRS is sent through the first port, wherein the first SRS is used to determine the uplink channel measurement result, the uplink channel measurement result is used to determine the uplink phase offset, the uplink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the uplink direction, the first network element is the reference transmission receiver point (TRP) in the cooperative joint transmission system, and the second network element includes the cooperative TRP in the cooperative joint transmission system. At least one Channel State Information Reference Signal (CSI-RS) is received through the first port, wherein the at least one Channel State Information Reference Signal (CSI-RS) is used to determine downlink channel measurement results, the downlink channel measurement results are used to determine downlink phase offset, and the downlink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the downlink direction; Send the downlink phase offset.

6. The method according to claim 5, characterized in that, The method further includes: Receive at least two second signaling messages, wherein the at least two second signaling messages are used to activate at least two trigger states respectively, the at least two trigger states respectively correspond to an SRS resource, and the SRS resource includes an SRS and the port corresponding to the SRS; At least two SRSs are transmitted through the port respectively, wherein the at least two SRSs are used to determine the first SRS, wherein the first SRS is a reference signal resource among the at least two SRSs whose channel quality is greater than a preset threshold.

7. The method according to claim 6, characterized in that, The method further includes: Receive report configuration information, wherein the report configuration information indicates N SRS resources corresponding to N trigger states, the at least two trigger states belong to the N trigger states, and the SRS resources belong to the N SRS resources.

8. A communication system, characterized in that, The communication system includes a terminal device, a first network element, and a second network element. The first network element is a reference TRP in the cooperative joint transmission system, and the second network element includes a cooperative TRP in the cooperative joint transmission system. The first network element is used to send a first signaling to the terminal device, wherein the first signaling is used to activate a first trigger state, the first trigger state corresponds to a first probe reference signal (SRS) resource, and the SRS resource includes a first SRS and a first port corresponding to the first SRS; The terminal device is configured to send the first SRS through the first port. The first SRS is used to determine the first uplink channel measurement result. The first uplink channel measurement result is used to determine the uplink phase offset. The uplink phase offset is used to indicate the phase offset of the second network element relative to the first network element in the uplink direction. The first network element is configured to send a first CSI-RS to the terminal device, wherein the first CSI-RS is configured to determine a first downlink channel measurement result, the first downlink channel measurement result is configured to determine a downlink phase offset, and the downlink phase offset is configured to indicate the phase offset of the second network element relative to the first network element in the downlink direction; The terminal device is used to send the downlink phase offset to the second network element.

9. The communication system according to claim 8, characterized in that, The second network element is used to measure the first SRS to obtain the second uplink channel measurement result; The first network element is used to send the first uplink channel measurement result and the first identifier to the second network element. The first identifier is used to indicate that the first uplink channel measurement result is the measurement result of the first SRS sent by the first port. The second network element is used to determine the uplink phase offset based on the first uplink channel measurement result and the second uplink channel measurement result.

10. The system according to claim 8 or 9, characterized in that, The second network element is used to send a second CSI-RS to the terminal device; The terminal device is configured to receive the second CSI-RS through the first port, wherein the second CSI-RS is used to determine the second downlink channel measurement result, and the first downlink channel measurement result and the second downlink channel measurement result are used to determine the downlink phase offset.

11. A communication device, characterized in that, in: The communication device includes a module for performing the method as described in any one of claims 1 to 4; or, a module for performing the method as described in any one of claims 5 to 7.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program, which, when executed, performs the method as described in any one of claims 1 to 7.

13. A communication system, characterized in that, Includes the apparatus as described in claim 11.

14. A computer program product containing instructions, characterized in that, When the computer program product is run on an electronic device, it causes the electronic device to perform the method as described in any one of claims 1 to 7.

15. A chip system, characterized in that, Including the processor; The processor is configured to execute computer execution instructions to cause a device on which the chip system is mounted to perform the method as described in any one of claims 1 to 7.

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