Method and device for determining service sending and receiving point

Abstract

The embodiment of the invention discloses a method and device for determining a service sending and receiving point, which can be applied to the technical field of communication, and the method executed by terminal equipment comprises the following steps: measuring reference signals in a reference signal group sent by network equipment, and determining a measurement result, the measurement result comprises arrival time and / or time delay spread of reference signals in the reference signal group; sending a measurement result to the network device; and receiving indication information sent by the network device, the indication information being used for indicating a service sending reception point TRP. Therefore, the network equipment can select the appropriate TRP for the terminal equipment, and the performance of the MIMO system is improved.

Description

Method and device for determining service sending and receiving points Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a method and device for determining a service sending and receiving point. Background Art

[0002] In the distributed Multiple-Input Multiple-Output (MIMO) technology of a communication system, multiple Transmit and Receive Points (TRPs) can provide services for one terminal device.

[0003] Summary of the Invention

[0004] The disclosed embodiments provide a method and apparatus for determining a serving transmission and reception point (TRP). A terminal device first measures reference signals in a reference signal group sent by a network device, determines the arrival time and / or delay spread of the reference signals in the reference signal group, then sends the measurement results to the network device and then receives a serving transmission and reception point (TRP) indicated by the network device. This allows the network device to select an appropriate TRP for the terminal device, improving the performance of the MIMO system.

[0005] In a first aspect, an embodiment of the present disclosure provides a method for determining a service transmission and reception point, the method being performed by a terminal device, the method comprising: measuring a reference signal in a reference signal group sent by a network device, and determining a measurement result, wherein the measurement result includes an arrival time and / or delay spread of the reference signal in the reference signal group;

[0006] Sending the measurement result to the network device;

[0007] Receive indication information sent by the network device, wherein the indication information is used to indicate a service sending and receiving point TRP.

[0008] In a second aspect, an embodiment of the present disclosure provides a method for determining a serving transmission and reception point, the method being performed by a network device, the method comprising: receiving a measurement result of a reference signal group associated with each candidate transmission and reception point TRP sent by a terminal device, wherein the measurement result includes an arrival time and / or delay spread of a reference signal in the reference signal group;

[0009] Determining a serving TRP among the candidate TRPs based on the measurement results;

[0010] Send indication information to the terminal device, wherein the indication information is used to indicate the service TRP.

[0011] In a third aspect, an embodiment of the present disclosure provides a communication device that implements some or all of the functions of the terminal device described in the method described in the first aspect above. For example, the functions of the communication device may include some or all of the functions in the embodiments of the present disclosure, or may include the functions of implementing any one of the embodiments of the present disclosure separately. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0012] In one implementation, the communication device may include a transceiver module and a processing module, wherein the processing module is configured to support the communication device in performing corresponding functions in the above method. The transceiver module is used to support communication between the communication device and other devices.

[0013] The communication device may further include a storage module, which is coupled to the transceiver module and the processing module and stores computer programs and data necessary for the communication device.

[0014] In one implementation, the communication device includes:

[0015] a processing module, configured to measure reference signals in a reference signal group sent by a network device, and determine a measurement result, wherein the measurement result includes an arrival time and / or a delay spread of the reference signals in the reference signal group;

[0016] The transceiver module is further configured to send the measurement result to the network device;

[0017] The transceiver module is further used to receive indication information sent by the network device, wherein the indication information is used to indicate the service sending and receiving point TRP.

[0018] In a fourth aspect, an embodiment of the present disclosure provides another communication device that has some or all of the functions of the network device in the method example described in the second aspect above. For example, the functions of the communication device may have some or all of the functions in the embodiments of the present disclosure, or may have the functions of implementing any one of the embodiments of the present disclosure alone. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0019] In one implementation, the communication device may include a transceiver module and a processing module, the processing module being configured to support the communication device in performing the corresponding functions of the above-described method. The transceiver module is configured to support communication between the communication device and other devices. The communication device may also include a storage module, coupled to the transceiver module and the processing module, which stores computer programs and data necessary for the communication device.

[0020] In one implementation, the communication device includes:

[0021] a transceiver module, configured to receive measurement results of reference signal groups associated with each candidate transmission and reception point TRP sent by a terminal device, wherein the measurement results include arrival times and / or delay spreads of reference signals in the reference signal groups;

[0022] a processing module, configured to determine a serving TRP among the candidate TRPs based on the measurement result;

[0023] The transceiver module is further configured to send indication information to the terminal device, wherein the indication information is used to indicate the service TRP. In a fifth aspect, an embodiment of the present disclosure provides a communication device, the communication device comprising a processor, which executes the method described in the first aspect above when the processor calls a computer program in a memory.

[0024] In a sixth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor. When the processor calls a computer program in a memory, the method described in the second aspect is executed.

[0025] In the seventh aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the first aspect above.

[0026] In an eighth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the second aspect above.

[0027] In a ninth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the first aspect above.

[0028] In the tenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the second aspect above.

[0029] In the eleventh aspect, an embodiment of the present disclosure provides a communication system, which includes the communication device described in the third to fourth aspects, or the system includes the communication device described in the fifth to sixth aspects, or the system includes the communication device described in the seventh to eighth aspects, or the system includes the communication device described in the ninth to tenth aspects.

[0030] In a twelfth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions for the above-mentioned receiving end, and when the instructions are executed, the receiving end executes the method described in the above-mentioned first aspect.

[0031] In a thirteenth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions for the above-mentioned transmitter, and when the instructions are executed, the transmitter executes the method described in the second aspect.

[0032] In a fourteenth aspect, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0033] In a fifteenth aspect, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the second aspect above.

[0034] In a sixteenth aspect, the present disclosure provides a chip system comprising at least one processor and an interface for supporting a terminal device in implementing the functions described in the first aspect, such as determining or processing at least one of the data and information involved in the above-described method. In one possible design, the chip system further comprises a memory for storing computer programs and data necessary for the receiving end. The chip system may be comprised solely of a chip or may include a chip and other discrete components.

[0035] In a seventeenth aspect, the present disclosure provides a chip system comprising at least one processor and an interface for supporting a network device in implementing the functions described in the second aspect, such as determining or processing at least one of the data and information described in the aforementioned method. In one possible design, the chip system further comprises a memory for storing computer programs and data necessary for the transmitter. The chip system may consist solely of a chip or may include a chip and other discrete components.

[0036] In an eighteenth aspect, the present disclosure provides a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0037] In a nineteenth aspect, the present disclosure provides a computer program, which, when executed on a computer, enables the computer to execute the method described in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the background technology, the drawings required for use in the embodiments of the present disclosure or the background technology will be described below.

[0039] FIG1 is a schematic diagram of the architecture of a communication system provided by the present disclosure;

[0040] FIG2 is a flow chart of a method for determining a service sending and receiving point provided by an embodiment of the present disclosure;

[0041] FIG3 is a schematic diagram of a reference signal provided by an embodiment of the present disclosure reaching a terminal device via different paths;

[0042] FIG4 is a schematic diagram of measurement results of a reference signal group provided by an embodiment of the present disclosure;

[0043] FIG5 is a flowchart of another method for determining a service sending and receiving point provided by an embodiment of the present disclosure;

[0044] FIG6 is a flowchart of another method for determining a service sending and receiving point provided by an embodiment of the present disclosure;

[0045] FIG7 is a structural diagram of a communication device provided by an embodiment of the present disclosure;

[0046] FIG8 is a structural diagram of another communication device provided by an embodiment of the present disclosure;

[0047] FIG9 is a schematic structural diagram of a chip provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] To facilitate understanding of the technical solutions of the present disclosure, some terms involved in the embodiments of the present disclosure are briefly introduced below.

[0049] 1. Radio Resource Control (RRC)

[0050] Terminal devices and network devices communicate with each other through wireless channels and exchange large amounts of information. Therefore, both parties need a control mechanism to exchange configuration information and reach an agreement. This control mechanism is RRC, or Radio Resource Control. It can be understood as the common language for terminal devices (UE) and network devices to communicate with each other. This language allows network devices and terminal devices (UE) to cooperate with each other tacitly.

[0051] 2. Media Access Control (MAC) Control Element (CE)

[0052] The Media Access Control (MAC) Control Element (CE) is the lower layer of the data link layer. It provides addressing and media access control, allowing different network devices or nodes on the network to communicate with each other on the shared medium without conflict.

[0053] 3. Downlink control information (DCI)

[0054] Downlink control information carried by the physical downlink control channel (PDCCH) and sent by the network equipment to the terminal equipment, including uplink and downlink resource allocation, Hybrid Automatic Repeat reQuest (HARQ) information, power control, etc.

[0055] 4. Quasi Co-Location (QCL)

[0056] Antenna port QCL is an assumption about the channel state between antenna ports. If a QCL relationship exists between two antenna ports, the large-scale channel information of one antenna port can be inferred from the large-scale channel information of the other antenna port.

[0057] 5. Cyclic Prefix (CP)

[0058] The cyclic prefix CP refers to the prefix of a symbol, and its main function is to reduce interference between symbols.

[0059] 6. Transmit and Receive Point (TRP)

[0060] A Transmit and Receive Point (TRP) is equivalent to a traditional base station. However, in some cases, a cell may not be covered by just one TRP, but rather by multiple TRPs. This increases the cell's coverage radius and significantly reduces the need for terminals to constantly switch between cells.

[0061] In order to better understand the method and apparatus for determining a service sending and receiving point disclosed in an embodiment of the present disclosure, the communication system to which the embodiment of the present disclosure is applicable is first described below.

[0062] Please refer to Figure 1, which is a schematic diagram of the architecture of a communication system provided in an embodiment of the present disclosure. The communication system may include, but is not limited to, one network device and one terminal device. The number and form of devices shown in Figure 1 are for example purposes only and do not constitute a limitation on the embodiments of the present disclosure. In actual applications, two or more network devices and two or more terminal devices may be included. The communication system shown in Figure 1 includes a network device 101 and a terminal device 102.

[0063] It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as long-term evolution (LTE) systems, fifth-generation (5G) mobile communication systems, 5G new radio (NR) systems, or other future new mobile communication systems.

[0064] The network device 101 in the embodiment of the present disclosure is an entity on the network side for transmitting or receiving signals and a device for communicating with a terminal device. The network device 101 can be a base transceiver station (BTS) in a global system for mobile communications (GSM) system or a code division multiple access (CDMA) system, a base station (nodeB, NB) in a wideband code division multiple access (WCDMA) system, an evolved nodeB (eNB or eNodeB) in an LTE system, a wireless controller in a cloud radio access network (CRAN) scenario, a radio network controller (RNC), a base station controller (BSC), a home base station (for example, a home evolved nodeB or home nodeB, HNB), a baseband unit (BBU), or a baseband controller. The network-side device may be a baseband unit (BBU), or the network-side device may be a relay station, an access point, an in-vehicle device, a wearable device, a network-side device in a 5G network, or a network-side device in a future-evolved PLMN network, etc. It may be an access point (AP) in a WLAN, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission and reception point (TRP), etc. It may be a gNB or a transmission point (TRP or TP) in a new wireless system (NR), or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or it may also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the network-side device.The network device provided by the embodiment of the present disclosure may be composed of a centralized unit (CU) and a distributed unit (DU), wherein the CU may also be called a control unit. The CU-DU structure may be used to separate network-side devices, such as the protocol layer of a network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining functions of some or all of the protocol layers being distributed in the DU, which is centrally controlled by the CU.

[0065] The terminal device 102 in the embodiment of the present disclosure may be a device that provides voice / data connectivity to a user, for example, a handheld device or a vehicle-mounted device with a wireless connection function. Some examples of terminal devices include: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (PLMNs). The present invention relates to a terminal device in a wireless communication system (PLMN) and / or any other suitable device for communicating on a wireless communication system, and the embodiments of the present disclosure are not limited thereto.

[0066] Wearable devices, also known as wearable smart devices, are a general term for wearable devices developed by applying wearable technology to intelligently design everyday wearables, such as glasses, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include those that are fully functional, large in size, and can achieve full or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0067] In addition, in the embodiment of the present disclosure, the terminal device 102 can also be a terminal device in an Internet of Things system. IoT (Internet of Things) is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection.

[0068] In addition, in the embodiment of the present disclosure, the terminal device 102 may also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (part of the terminal device), receiving control information and downlink data from the network side device, and sending electromagnetic waves to transmit uplink data to the network side device.

[0069] It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as long-term evolution (LTE) systems, fifth-generation (5G) mobile communication systems, 5G new radio (NR) systems, or other future new mobile communication systems.

[0070] Among them, the terminal device 102 provided in the embodiment of the present disclosure can execute the method shown in the embodiment of Figure 2, and the network device 101 can execute the method shown in the embodiment of Figure 4.

[0071] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0072] In addition, in order to facilitate understanding of the embodiments of the present disclosure, the following points are explained.

[0073] First, the first, second, and various numbers in this disclosure are only used for the convenience of description and are not intended to limit the scope of the embodiments of this disclosure, for example, to distinguish different information, different terminal devices, etc.

[0074] Second, the "protocol" involved in the embodiments of the present disclosure may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, a NR protocol, and related protocols used in future communication systems, and the present disclosure does not limit this.

[0075] Third, the embodiments of the present disclosure list multiple implementation methods to clearly illustrate the technical solutions of the embodiments of the present disclosure. Of course, those skilled in the art will understand that the multiple embodiments provided in the embodiments of the present disclosure can be implemented individually, combined with the methods of other embodiments of the embodiments of the present disclosure, or implemented individually or in combination with some methods in other related technologies; the embodiments of the present disclosure are not limited to this.

[0076] At present, in application scenarios such as Extended Reality (XR) services (such as Virtual Reality (VR) and Augmented Reality (AR)), Internet of Vehicles, and Internet of Things, ultra-high-speed, ultra-low latency, and ultra-large bandwidth communications have become the norm. In order to meet this requirement, distributed MIMO has been developed based on traditional classical MIMO technology. Multiple TRPs serve one UE, and the signal quality is better guaranteed to meet the UE's high-speed and high-capacity service needs. For this purpose, the time and delay spread of different TRP reference signals reaching the UE are measured to assist network equipment in solving the problem of selecting and indicating the service TRP in a transmission system based on multiple TRPs. The present disclosure is directed to a method for enabling a network device to determine the service sending and receiving point TRP in a transmission system based on multiple TRPs.

[0077] In this disclosure, a terminal device first measures the reference signals in a reference signal group sent by a network device, determines the arrival time and / or delay spread of the reference signals in the reference signal group, then sends the measurement results to the network device and then receives the serving transmission reception point (TRP) indicated by the network device. This allows the network device to select an appropriate TRP for the terminal device, improving the performance of the MIMO system.

[0078] It should be noted that in the present disclosure, the network device can be any device on the network side in the MIMO architecture that provides communication service decisions or respective functional services for the terminal device, such as a control unit CU, or a core network device, etc. The corresponding TRP is the access network device on the network side, or the remote radio unit (RRU) in the access network device. For the convenience of explanation, the following embodiments of the present disclosure are uniformly described by taking the network device as the CU and the TRP as the RRU as an example. In the present disclosure, the reference signal sent by the network device is sent to the terminal device after passing through the TRP. Correspondingly, the measurement result returned by the terminal device is also transmitted back to the network device through the TRP. After that, the network device can select a service TRP for the terminal device based on the measurement result.

[0079] The following describes in detail a method and device for determining a service sending and receiving point provided by the present disclosure with reference to the accompanying drawings.

[0080] Please refer to Figure 2, which is a flow chart of a method for determining a service sending and receiving point provided by an embodiment of the present disclosure. As shown in Figure 2, the method is applied to a terminal device. The method may include but is not limited to the following steps:

[0081] Step 201: measure reference signals in a reference signal group sent by a network device to determine a measurement result, wherein the measurement result includes arrival time and / or delay spread of the reference signals in the reference signal group.

[0082] The reference signal group is a combination of reference signals associated with each candidate TRP. Delay spread represents the difference in time it takes for the same reference signal (RS) to reach a terminal device via a non-earliest path and the earliest path. The earliest path is the shortest path by which the reference signal can reach the terminal device. Maximum delay spread is the difference in time it takes for the same reference signal to reach the terminal device via the longest transmission path and the earliest path.

[0083] For example, Figure 3 shows a schematic diagram of a reference signal reaching a terminal device via different paths. As shown in Figure 3, the reference signal associated with TRP#1 can reach the terminal device via three different paths. The path where the reference signal can directly reach the terminal device can be called the shortest path, or the earliest path. As shown in Figure 3, the time it takes for the reference signal to reach the terminal device via the shortest path is t a , the transmission time of the reference signal reaching the terminal device after passing through obstacle 1 (reflection, scattering or refraction) is t c , the transmission time of the reference signal reaching the terminal device after passing through obstacle 2 (reflection, scattering or refraction) is t bSince the transmission path through obstacle 1 is longer than the transmission path through obstacle 2, it can be seen that t c >t b >t a Therefore, the delay spread of the reference signal associated with TRP#1 includes Δt ba =t b -t a , Δt ca =t c -t a , due to t c >t b , so we know that Δt ca >Δt ba , that is, the maximum delay spread corresponding to the reference signal associated with TRP#1 is Δt ca .

[0084] In some possible implementations, the measurement result may include the earliest path arrival time and the maximum delay spread of each reference signal.

[0085] As shown in FIG4 , FIG4 is a schematic diagram of measurement results of a reference signal group provided by an embodiment of the present disclosure.

[0086] As shown in Figure 4a), RS1, RS2, and RS3 are reference signals 1, 2, and 3, respectively. t1, t2, and t3 are the earliest arrival times of RS1, RS2, and RS3, respectively. Δt1, Δt2, and Δt3 are the maximum delay spreads of RS1, RS2, and RS3, respectively. The maximum delay spread of the i-th reference signal is: Δt i =t i,latest -ti,earliest, where t i,latest is the latest arrival time of the i-th reference signal, and ti,earliest is the earliest arrival time of the i-th reference signal. For example, the maximum delay spread of RS2 is: Δt2 = t 2,latest -t2,earliest.

[0087] In some possible implementation forms, the measurement result may further include a delay spread of each reference signal relative to the earliest path arrival time of the reference signal group.

[0088] As shown in Figure 4b), RS1, RS2, and RS3 are reference signal 1, reference signal 2, and reference signal 3 respectively. earliest is the earliest arrival time of all reference signals. Δt′1, Δt′2, and Δt′3 are the delay spreads of RS1, RS2, and RS3 relative to the earliest arriving reference signal, respectively. The delay spread calculation formula for the i-th signal relative to the earliest arriving reference signal is: Δt′ i =T i,latest-t earliest , where t i,latest is the latest arrival time of the i-th reference signal. For example, the delay spread calculation formula of RS2 relative to the earliest arriving reference signal is: Δt′2=t 2,latest -t earliest .

[0089] In some possible implementation forms, the measurement result may further include a comprehensive maximum delay spread of the reference signal group.

[0090] As shown in Figure 4c), RS1, RS2, and RS3 are reference signals 1, 2, and 3 respectively. max is the combined maximum delay spread of all reference signals, that is, the time difference between the latest arrival path and the earliest arrival path. The calculation formula for the combined maximum delay spread of all reference signals is: Δt max =t latest -t earliest , where t latest is the latest arrival time of all reference signals, t earliest is the earliest arrival time of all reference signals. For example, the calculation formula for the combined reference maximum delay spread of RS1, RS2, and RS3 is: Δt max =t latest -t earliest .

[0091] Step 202: Send the measurement result to the network device.

[0092] In one implementation of the present disclosure, the terminal device sends the earliest path arrival time and the maximum delay spread of each reference signal in the reference signal group to the network device.

[0093] In some possible implementation forms, the terminal device may send the measurement results to the network device through any candidate TRP.

[0094] Step 203: Receive indication information sent by the network device, wherein the indication information is used to indicate the service sending and receiving point TRP.

[0095] In some possible implementations, the terminal device may receive the indication information sent by the network device through a radio resource control (RRC) message, may receive the indication information sent by the network device through a medium access control (MAC) control element (CE), or may receive the indication information sent by the network device through downlink control information (DCI). This disclosure is not limited to this.

[0096] In some possible implementation forms, the indication information may include a TRP identifier, so that the terminal device can directly determine the service sending and receiving point TRP based on the TRP identifier in the indication information.

[0097] In some possible implementations, the indication information sent by the network device and received by the terminal device may also include a quasi-co-site QCL identification group. Typically, a TRP has multiple antenna ports, and the network device typically configures a QCL relationship for antenna ports with the same or similar locations. Therefore, the network device can indirectly indicate the serving TRP identifier by indicating the QCL identification group to the terminal device. After receiving the QCL identification group, the terminal device can determine the serving TRP based on the relationship between the QCL identification group and the TRP.

[0098] For example, the indication information sent by the network device and received by the terminal device includes QCL identification group 1, wherein QCL identification group 1 includes QCL#0, QCL#1, and QCL#2. The terminal device then searches for the mapping relationship between the QCL identification and the antenna port to determine that QCL#0 corresponds to antenna port #0 and antenna port #1, QCL#1 corresponds to antenna port #2 and antenna port #3, and QCL#2 corresponds to antenna port #4 and antenna port #5. At the same time, antenna port #0 to antenna port #5 are all antenna ports in TRP#0. Therefore, the terminal device can determine that the service TRP is TRP#0.

[0099] In some possible implementations, the indication information sent by the network device and received by the terminal device may also include a reference signal identifier group, where the reference signal identifier group includes identifiers of one or more reference signals. The terminal device can then determine the serving transmission and reception point (TRP) based on the correspondence between the reference signal identifiers and the TRP.

[0100] For example, a terminal device receives an indication from a network device that includes reference signal identifier group 1, which includes reference signal #1 and reference signal #2. The terminal device then searches for a mapping between reference signal identifiers and TRPs to determine that reference signal #1 is associated with TRP #1 and reference signal #2 is associated with TRP #2. The terminal device can then determine that the serving TRP groups are TRP #1 and TRP #2.

[0101] In some possible implementation forms, the terminal device can receive the indication information sent by the network device through any TRP, where any service TRP is a service TRP determined by the network device.

[0102] In summary, the terminal device first measures the reference signals in the reference signal group sent by the network device, determines the arrival time and / or delay spread of the reference signals in the reference signal group, then sends the measurement results to the network device, and then receives the serving transmission reception point (TRP) indicated by the network device. This allows the network device to select an appropriate TRP for the terminal device, improving the performance of the MIMO system.

[0103] Please refer to Figure 5, which is a flow chart of a method for determining a service sending and receiving point provided by an embodiment of the present disclosure. As shown in Figure 4, the method is applied to a network device and may include but is not limited to the following steps:

[0104] Step 501: Receive measurement results of reference signal groups associated with each candidate transmitting / receiving point TRP sent by a terminal device, wherein the measurement results include arrival time and / or delay spread of the reference signals in the reference signal group.

[0105] The reference signal group is a combination of reference signals associated with each candidate TRP. Delay spread represents the difference in time it takes for the same reference signal (RS) to reach a terminal device via a non-earliest path and the earliest path. The earliest path is the shortest path by which the reference signal can reach the terminal device. Maximum delay spread is the difference in time it takes for the same reference signal to reach the terminal device via the longest transmission path and the earliest path.

[0106] Referring to Figure 3 above, Figure 3 is a schematic diagram illustrating the reference signal reaching the terminal device via different paths. As shown in Figure 3, the reference signal associated with TRP#1 can reach the terminal device via three different paths. Among them, the path where the reference signal can directly reach the terminal device can be called the shortest path, or the earliest path. As shown in Figure 3, the time it takes for the reference signal to reach the terminal device via the shortest path is t. a , the transmission time of the reference signal reaching the terminal device after passing through obstacle 1 (reflection, scattering or refraction) is t c , the transmission time of the reference signal reaching the terminal device after passing through obstacle 2 (reflection, scattering or refraction) is t b Since the transmission path through obstacle 1 is longer than the transmission path through obstacle 2, it can be seen that t c >t b >t a Therefore, the delay spread of the reference signal associated with TRP#1 includes Δt ba =t b -t a , Δt ca =t c -t a , due to t c >t b , so we know that Δt ca >Δt ba , that is, the maximum delay spread corresponding to the reference signal associated with TRP#1 is Δt ca .

[0107] In some possible implementations, the measurement result may include the earliest path arrival time and the maximum delay spread of each reference signal.

[0108] Referring to Figure 4a), RS1, RS2, and RS3 are reference signals 1, 2, and 3, respectively. t1, t2, and t3 are the earliest arrival times of RS1, RS2, and RS3, respectively. Δt1, Δt2, and Δt3 are the maximum delay spreads of RS1, RS2, and RS3, respectively. The maximum delay spread of the i-th reference signal is: Δt i =t i,latest -ti,earliest, where t i,latest is the latest arrival time of the i-th reference signal, and ti,earliest is the earliest arrival time of the i-th reference signal. For example, the maximum delay spread of RS2 is: Δt2 = t 2,latest -t2,earliest.

[0109] In some possible implementation forms, the measurement result may further include a delay spread of each reference signal relative to the earliest path arrival time of the reference signal group.

[0110] Referring to FIG4b), RS1, RS2, and RS3 are reference signal 1, reference signal 2, and reference signal 3, respectively. earliest is the earliest arrival time of all reference signals. Δt′1, Δt′2, and Δt′3 are the delay spreads of RS1, RS2, and RS3 relative to the earliest arriving reference signal, respectively. The delay spread calculation formula for the i-th signal relative to the earliest arriving reference signal is: Δt′ i =t i,latest -t earliest , where t i,latest is the latest arrival time of the i-th reference signal. For example, the delay spread calculation formula of RS2 relative to the earliest arriving reference signal is: Δt′2=t 2,latest -t earliest .

[0111] In some possible implementation forms, the measurement result may further include a comprehensive maximum delay spread of the reference signal group.

[0112] Referring to FIG4c), RS1, RS2, and RS3 are reference signals 1, 2, and 3, respectively. max is the combined maximum delay spread of all reference signals, that is, the time difference between the latest arrival path and the earliest arrival path. The calculation formula for the combined maximum delay spread of all reference signals is: Δt max =t latest -t earliest , where t latestis the latest arrival time of all reference signals, t earliest is the earliest arrival time of all reference signals. For example, the calculation formula for the combined reference maximum delay spread of RS1, RS2, and RS3 is: Δt m a x =t latest -t earliest .

[0113] In some possible implementation forms, the network device may receive the measurement results sent by the terminal device through any candidate TRP.

[0114] It should be noted that before receiving the measurement results sent by the terminal device, the network device needs to first send the reference signal associated with each TRP to the terminal device through each candidate TRP.

[0115] Step 502: Determine the serving TRP among the candidate TRPs based on the measurement results.

[0116] In the present disclosure, the network device can filter out the service TRP from each candidate TRP based on the preset candidate TRP screening conditions and measurement results; or, the network device can filter out the service TRP from each candidate TRP based on protocol agreements and measurement results; or, the network device can filter out the service TRP from each candidate TRP based on measurement results based on current system requirements, and the present disclosure does not limit this.

[0117] For example, the screening criteria for candidate TRPs include the comprehensive maximum delay spread Δt of the reference signal group. max Less than the cyclic prefix CP length. Then, after obtaining the measurement results, the network device can determine the comprehensive maximum delay spread Δt of the reference signal group based on the measurement results. max , if the comprehensive maximum delay spread Δt of the reference signal group max If it is less than CP, then one or more TRPs can be arbitrarily selected from the candidate TRPs as the service TRP.

[0118] The cyclic prefix (CP) length may be set based on factors such as specific communication requirements and system design, or may be set based on historical communication data of the MIMO system, and this disclosure does not impose any limitation on this.

[0119] In some possible implementations, if the measurement result includes the comprehensive maximum delay spread Δt of the reference signal group max , the network device can directly obtain the comprehensive maximum delay spread Δt of the reference signal group from the measurement results max .

[0120] In some possible implementations, if the measurement result includes the earliest path arrival time and the maximum delay spread of each reference signal in the reference signal group, the network device may first add the earliest path arrival time of the reference signal that arrives last in the reference signal group and its corresponding maximum delay spread to calculate the latest path arrival time of the reference signal. The network device then subtracts the latest path arrival time of the reference signal from the earliest path arrival time of all reference signals to obtain the comprehensive maximum delay spread Δt of the reference signal group. max .

[0121] In some possible implementations, if the measurement result includes the delay spread of each reference signal in the reference signal group relative to the earliest path arrival time of the reference signal group, the network device may select the largest delay spread from the delay spreads of each reference signal relative to the earliest path arrival time of the reference signal group as the comprehensive maximum delay spread Δt max .

[0122] In some possible implementations, when the measurement results do not meet the conditions of the service TRP, in order to ensure that the terminal device can communicate reliably, the network device needs to configure a service TRP for the terminal device, so that the network device can determine the quality parameters of each reference signal in the reference signal group, and then select at least one TRP from each candidate TRP as the service TRP based on the quality parameters of each reference signal.

[0123] Among them, the conditions for service TRP can be determined according to the agreement, or be preset in the network equipment, or be determined by the network equipment based on the historical data of the MIMO system and the current business situation. This disclosure does not limit this.

[0124] The quality parameter of the reference signal may include at least one of Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), etc., which is not limited in the present disclosure.

[0125] For example, the service TRP condition is the combined maximum delay spread Δt of the reference signal group. max The reference signal group associated with each candidate transmission and reception point TRP includes: reference signal #1 associated with TRP#1, reference signal #2 associated with TRP#2, and reference signal #3 associated with TRP#3. The network device obtains the comprehensive maximum delay spread Δt of the reference signal group from the measurement results. max , and compare it with the cyclic prefix CP length.

[0126] When the comprehensive maximum delay spread is less than the CP length, the measurement results meet the conditions of the service TRP, and the network device can determine any one or more TRPs among the candidate TRPs as the service TRP. For example, TRP#1 and TRP#2 can be selected as the service TRP group, or TRP#1 and TRP#3 can be selected as the service TRP group, or TRP#1, TRP#2, TRP#3 can be selected as the service TRP group, and so on.

[0127] When the comprehensive maximum delay spread is greater than or equal to the CP length, it can be confirmed that the measurement results do not meet the conditions of the service TRP. The network equipment can then compare the quality parameters corresponding to each reference signal, such as RSRQ. After comparison, it is found that the RSRQ corresponding to TRP#1 and TRP#2 are greater than the RSRQ corresponding to TRP#3, and the comprehensive maximum delay spread corresponding to TRP#1 and TRP#2 is less than the CP length. Therefore, at least one of TRP#1 and TRP#2 can be selected as the service TRP.

[0128] Step 503: Send indication information to the terminal device, where the indication information is used to indicate the service TRP.

[0129] In some possible implementations, the network device may send the indication information to the terminal device via a radio resource control (RRC) message, may send the indication information to the terminal device via a medium access control (MAC) control element (CE), or may send the indication information to the terminal device via downlink control information (DCI). This disclosure does not limit this.

[0130] In some possible implementation forms, the indication information may include a TRP identifier, so that the terminal device can directly determine the service sending and receiving point TRP based on the TRP identifier in the indication information.

[0131] In some possible implementations, the indication information sent by the network device to the terminal device may also include a quasi-co-site QCL identification group. Typically, a TRP has multiple antenna ports, and the network device typically configures a QCL relationship for antenna ports with the same or similar locations. Therefore, the network device can indirectly indicate the serving TRP identifier by indicating the QCL identification group to the terminal device. After receiving the QCL identification group, the terminal device can determine the serving TRP based on the relationship between the QCL identification group and the TRP.

[0132] For example, the indication information sent by the network device to the terminal device includes QCL identifier group 1, where QCL identifier group 1 includes QCL#0, QCL#1, and QCL#2. The terminal device then searches for the mapping relationship between the QCL identifier and the antenna port to determine that QCL#0 corresponds to antenna port #0 and antenna port #1, QCL#1 corresponds to antenna port #2 and antenna port #3, and QCL#2 corresponds to antenna port #4 and antenna port #5. At the same time, antenna port #0 to antenna port #5 are all antenna ports in TRP#0. Therefore, the terminal device can determine that the service TRP is TRP#0.

[0133] In some possible implementations, the indication information sent by the network device to the terminal device may also include a reference signal identifier group. The terminal device may then determine the service transmission and reception point TRP based on the correspondence between the reference signal identifier and the TRP.

[0134] For example, the indication information sent by the network device to the terminal device includes reference signal identifier group 1, which includes reference signals #1 and #2. The terminal device then searches the mapping relationship between reference signal identifiers and TRPs to determine that reference signal #1 is associated with TRP #1 and reference signal #2 is associated with TRP #2. The terminal device can then determine that the serving TRP groups are TRP #1 and TRP #2.

[0135] In some possible implementation forms, the network device may send indication information to the terminal device through any determined service TRP.

[0136] In summary, the network device receives measurement results of reference signal groups associated with each candidate transmission / reception point (TRP) from the terminal device, where the measurement results include the arrival time and / or delay spread of the reference signals in the reference signal group. Based on the measurement results, the network device then determines the serving TRP among the candidate TRPs and finally sends indication information to the terminal device, where the indication information is used to indicate the serving TRP. This allows the network device to select an appropriate TRP for the terminal device, improving the performance of the MIMO system.

[0137] Please refer to Figure 6, which is a flow chart of a method for determining a service sending and receiving point provided by an embodiment of the present disclosure. As shown in the figure, the method is applied to the interaction between a terminal device and a network device, and the method may include but is not limited to the following steps:

[0138] Step 601: The network device sends a reference signal associated with each TRP to the terminal device through each candidate TRP.

[0139] Step 602: The terminal device measures the reference signals in the reference signal group and determines a measurement result, wherein the measurement result includes the arrival time and / or delay spread of the reference signals in the reference signal group.

[0140] Step 603: The terminal device sends the measurement result to the network device.

[0141] In step 604, the network device determines the service TRP among the candidate TRPs based on the measurement results.

[0142] Step 605: The network device sends indication information to the terminal device through any determined service TRP, wherein the indication information is used to indicate the service TRP.

[0143] In summary, through simple interaction between the terminal device and the network device, the network device can select a suitable TRP for the terminal device, thereby improving the performance of the MIMO system.

[0144] Please refer to Figure 7, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present disclosure. The communication device 700 shown in Figure 7 may include a transceiver module 701 and a processing module 702. The transceiver module may include a sending module and / or a receiving module. The sending module is used to implement a sending function, and the receiving module is used to implement a receiving function. The transceiver module can implement the sending function and / or the receiving function.

[0145] The communication device 700 may be a terminal device, a device in a terminal device, or a device that can be used in conjunction with the terminal device.

[0146] The communication device 700 is located on the terminal device side, wherein:

[0147] a processing module 702 configured to measure reference signals in a reference signal group sent by a network device and determine a measurement result, wherein the measurement result includes an arrival time and / or a delay spread of the reference signals in the reference signal group;

[0148] The transceiver module 701 is configured to send the measurement result to the network device;

[0149] The transceiver module 701 is further used to receive indication information sent by the network device, wherein the indication information is used to indicate the service sending and receiving point TRP.

[0150] In some possible implementations, the measurement result includes any one of the following:

[0151] The earliest path arrival time and maximum delay spread of each reference signal;

[0152] The delay spread of each reference signal relative to the earliest path arrival time of the reference signal group;

[0153] The combined maximum delay spread of the reference signal group.

[0154] In some possible implementations, the transceiver module 701 is further configured to:

[0155] The indication information sent by the network device is received through any one of the following: radio resource control RRC message, medium access control MAC control element CE, downlink control information DCI.

[0156] In some possible implementations, the indication information includes at least one of the following:

[0157] TRP identifier, quasi-co-site QCL identifier group, reference signal identifier group.

[0158] In summary, the terminal device first measures the reference signals in the reference signal group sent by the network device, determines the arrival time and / or delay spread of the reference signals in the reference signal group, then sends the measurement results to the network device, and then receives the serving transmission reception point (TRP) indicated by the network device. This allows the network device to select an appropriate TRP for the terminal device, improving the performance of the MIMO system.

[0159] The communication device 700 may also be a network device, a device in a network device, or a device that can be used in conjunction with a network device.

[0160] The communication device 700 is on the network device side, wherein:

[0161] The transceiver module 701 is configured to receive measurement results of reference signal groups associated with each candidate transmission and reception point TRP sent by a terminal device, wherein the measurement results include arrival times and / or delay spreads of reference signals in the reference signal groups;

[0162] A processing module 702 is configured to determine a serving TRP among the candidate TRPs based on the measurement result;

[0163] The transceiver module 701 is further used to send indication information to the terminal device, wherein the indication information is used to indicate the service TRP.

[0164] In some possible implementations, the processing module 702 is further configured to:

[0165] If the measurement result does not meet the condition of the serving TRP, determining a quality parameter of each reference signal in the reference signal group;

[0166] Based on the quality parameter of each reference signal, at least one TRP is selected from the candidate TRPs as the serving TRP.

[0167] In some possible implementations, the measurement result includes any one of the following:

[0168] The earliest path arrival time and maximum delay spread of each reference signal;

[0169] The delay spread of each reference signal relative to the earliest path arrival time of the reference signal group;

[0170] The combined maximum delay spread of the reference signal group.

[0171] In some possible implementations, the transceiver module 701 is further configured to:

[0172] The indication information is sent to the terminal device through any one of the following items: radio resource control RRC message, medium access control MAC control unit CE, downlink control information DCI.

[0173] In some possible implementations, the indication information includes at least one of the following:

[0174] TRP identifier, quasi-co-site QCL identifier group, reference signal identifier group.

[0175] In summary, the network device receives measurement results of reference signal groups associated with each candidate transmission / reception point (TRP) from the terminal device, where the measurement results include the arrival time and / or delay spread of the reference signals in the reference signal group. Based on the measurement results, the network device then determines the serving TRP among the candidate TRPs and finally sends indication information to the terminal device, where the indication information is used to indicate the serving TRP. This allows the network device to select an appropriate TRP for the terminal device, improving the performance of the MIMO system.

[0176] Please refer to Figure 8, which is a schematic diagram of the structure of another communication device 800 provided in an embodiment of the present disclosure. Communication device 800 can be a terminal device or a network device, or a chip, chip system, or processor that supports the terminal device to implement the above method, or a chip, chip system, or processor that supports the network device to implement the above method. This communication device 800 can be used to implement the method described in the above method embodiment. For details, please refer to the description of the above method embodiment.

[0177] The communication device 800 may include one or more processors 801. The processor 801 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control the communication device (e.g., network-side equipment, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.), execute computer programs, and process computer program data.

[0178] In some possible implementations, the communication device 800 may further include one or more memories 802, on which a computer program 804 may be stored. The memories 802 execute the computer program 804, so that the communication device 800 performs the method described in the above method embodiment. In some possible implementations, the memories 802 may also store data. The communication device 800 and the memories 802 may be provided separately or integrated together.

[0179] In some possible implementations, the communication device 800 may further include a transceiver 805 and an antenna 806. The transceiver 805 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., and is configured to implement transceiver functions. The transceiver 805 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, etc., and is configured to implement a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., and is configured to implement a transmitting function.

[0180] In some possible implementations, the communication device 800 may further include one or more interface circuits 807. The interface circuit 807 is configured to receive code instructions and transmit them to the processor 801. The processor 801 executes the code instructions to enable the communication device 800 to perform the method described in the above method embodiment.

[0181] In one implementation, processor 801 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and transmitting functions may be separate or integrated. The transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or may be used for transmitting or delivering signals.

[0182] In one implementation, processor 801 may store a computer program 803. Computer program 803, when executed on processor 801, enables communication device 800 to perform the method described in the above method embodiment. Computer program 803 may be embedded in processor 801, in which case processor 801 may be implemented by hardware.

[0183] In one implementation, the communication device 800 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments. The processor and transceiver described in the present disclosure can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0184] The communication device described in the above embodiments may be a terminal device, but the scope of the communication device described in this disclosure is not limited thereto, and the structure of the communication device may not be limited to FIG8 . The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0185] (1) An independent integrated circuit (IC), or chip, or chip system or subsystem;

[0186] (2) having a set of one or more ICs, which, in some possible implementations, may also include a storage component for storing data and computer programs;

[0187] (3) ASIC, such as modem;

[0188] (4) Modules that can be embedded in other devices;

[0189] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0190] (6)Others, etc.

[0191] For the case where the communication device may be a chip or a chip system, please refer to 9, which is a structural diagram of a chip provided in an embodiment of the present disclosure.

[0192] The chip 900 includes a processor 901 and an interface 903. There may be one or more processors 901 and there may be more than one interface 903.

[0193] For the case where the chip is used to implement the functions of the terminal device in the embodiments of the present disclosure:

[0194] The interface 903 is used to receive code instructions and transmit them to the processor.

[0195] Processor 901 is used to run code instructions to execute the information synchronization method based on artificial intelligence positioning function as described in some of the above embodiments.

[0196] For the case where the chip is used to implement the function of the transmitter in the embodiments of the present disclosure:

[0197] The interface 903 is used to receive code instructions and transmit them to the processor.

[0198] Processor 901 is used to run code instructions to execute the information synchronization method based on artificial intelligence positioning function as described in some of the above embodiments.

[0199] In some possible implementations, the chip 900 further includes a memory 902 , which is used to store necessary computer programs and data.

[0200] Those skilled in the art will also appreciate that the various illustrative logical blocks and steps listed in the embodiments of the present disclosure may be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the described functionality for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of the present disclosure.

[0201] An embodiment of the present disclosure also provides a communication system, which includes the communication device as a terminal device and the communication device as a network device in the embodiment of Figure 7, or the system includes the communication device as a terminal device and the communication device as a network device in the embodiment of Figure 8.

[0202] The present disclosure also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

[0203] The present disclosure also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0204] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0205] Those skilled in the art will understand that the various numerical numbers such as first and second involved in the present disclosure are only for the convenience of description and are not used to limit the scope of the embodiments of the present disclosure, and also indicate the order of precedence.

[0206] At least one in the present disclosure can also be described as one or more, and multiple can be two, three, four or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b and c can represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c. Wherein a, b and c can be single or multiple, respectively. This disclosure is not limited. In the embodiments of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order of precedence or size between the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0207] The correspondences shown in the tables of the present disclosure can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values, which are not limited by the present disclosure. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, in the tables of the present disclosure, the correspondences shown in certain rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables may also adopt other names that can be understood by the communication device, and the values ​​or representations of the parameters may also adopt other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures may also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables, etc.

[0208] The predefined in the present disclosure may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0209] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0210] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0211] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A method for determining a service sending and receiving point, characterized in that: Executed by a terminal device, the method includes: Measuring a reference signal in a reference signal group sent by a network device to determine a measurement result, wherein the measurement result includes an arrival time and / or a delay spread of the reference signal in the reference signal group; Sending the measurement result to the network device; Receive indication information sent by the network device, wherein the indication information is used to indicate a service sending receiving point TRP.

2. The method according to claim 1, characterized in that The measurement results include any of the following: The earliest path arrival time and maximum delay spread of each of the reference signals; The delay spread of each reference signal relative to the earliest path arrival time of the reference signal group; The combined maximum delay spread of the reference signal group.

3. The method according to claim 1, characterized in that The receiving the indication information sent by the network device includes: The indication information sent by the network device is received through any one of the following: a radio resource control RRC message, a medium access control MAC control element CE, and a downlink control information DCI.

4. The method according to any one of claims 1 to 3, characterized in that: The indication information includes at least one of the following: a TRP identifier, a quasi-co-site QCL identifier group, and a reference signal identifier group.

5. A method for determining a service sending and receiving point, characterized in that: Executed by a network device, the method includes: Receiving a measurement result of a reference signal group associated with each candidate transmission / reception point TRP sent by a terminal device, wherein the measurement result includes an arrival time and / or a delay spread of a reference signal in the reference signal group; Determine a serving TRP among the candidate TRPs based on the measurement result; Send indication information to the terminal device, wherein the indication information is used to indicate the service TRP.

6. The method according to claim 5, characterized in that Also includes: In case the measurement result does not satisfy the condition of the service TRP, determining a quality parameter of each reference signal in the reference signal group; Based on the quality parameter of each of the reference signals, at least one TRP is selected from the candidate TRPs as the serving TRP.

7. The method according to claim 5, characterized in that The measurement results include any of the following: The earliest path arrival time and maximum delay spread of each of the reference signals; The delay spread of each reference signal relative to the earliest path arrival time of the reference signal group; The combined maximum delay spread of the reference signal group.

8. The method according to claim 5, characterized in that The sending the indication information to the terminal device includes: The indication information is sent to the terminal device through any one of the following items: radio resource control RRC message, medium access control MAC control unit CE, downlink control information DCI.

9. The method according to any one of claims 5 to 8, characterized in that: The indication information includes at least one of the following: a TRP identifier, a quasi-co-site QCL identifier group, and a reference signal identifier group.

10. A terminal device, characterized in that: include: A processing module, configured to measure a reference signal in a reference signal group sent by a network device, and determine a measurement result, wherein the measurement result includes an arrival time and / or a delay spread of the reference signal in the reference signal group; The transceiver module is further used to send the measurement result to the network device; The transceiver module is also used to receive indication information sent by the network device, wherein the indication information is used to indicate the service sending and receiving point TRP.

11. A network device, characterized in that: include: A transceiver module, configured to receive a measurement result of a reference signal group associated with each candidate transmitting and receiving point TRP sent by a terminal device, wherein the measurement result includes an arrival time and / or a delay spread of a reference signal in the reference signal group; A processing module, configured to determine a serving TRP among the candidate TRPs based on the measurement result; The transceiver module is also used to send indication information to the terminal device, wherein the indication information is used to indicate the service TRP.

12. A communication device, characterized in that: The device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory so that the device performs the method as described in any one of claims 1 to 4, or the processor executes the computer program stored in the memory so that the device performs the method as described in any one of claims 5 to 9.

13. A communication device, characterized in that: include: processor and interface circuits; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is used to run the code instructions to execute the method according to any one of claims 1 to 4, or is used to run the code instructions to execute the method according to any one of claims 5 to 9.

14. A communication system, characterized in that: Including terminal equipment and network equipment; The terminal device is used to execute the method according to any one of claims 1 to 4, and the network device is used to execute the method according to any one of claims 5 to 9.

15. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 1 to 4 to be implemented, or, when executed, enable the method according to any one of claims 5 to 9 to be implemented.

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