Communication method and communication device

Abstract

The invention provides a communication method and a communication device. In the method, a first device can configure multiple sets of reference signal resources. Wherein one set comprises N first reference signal resources (the N first reference signal resources are used for first cooperative transmission measurement, and the N first reference signal resources are released after the measurement is completed); in the subsequent measurement process, another set comprising M second reference signal resources is adopted, and the M second reference signal resources are associated with the M first reference signal resources fed back by the second device, that is, the second device can select the reference signal resources in the first cooperative transmission measurement process, and the second device can select the reference signal resources in the second cooperative transmission measurement process. And the flexibility of selecting the cooperation set by the second device is favorably kept (different cooperation sets correspond to different reference signal resources). Moreover, in the subsequent measurement process, the first device does not need to configure more second reference signal resources (only M second reference signal resources are configured) for the second device, so that the waste of the reference signal resources can be avoided.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and a communication device. Background Art

[0002] In order to improve the system throughput performance and user experience, network equipment can allow multiple transmission and receiving points (TRPs) to serve one terminal based on multi-station collaboration. For example, multiple TRPs can form a collaborative transmission measurement set, and multiple TRPs can send down multiple channel state information reference signals (CSI-RS). Correspondingly, the terminal can select CSI-RS resources and feedback the joint CSI of multiple TRPs in the collaborative set. Therefore, how to maintain the flexibility of the terminal in selecting the collaborative set and avoid wasting reference signal measurement resources has become a problem to be solved. Summary of the invention

[0003] The present application provides a communication method and a communication device, which are conducive to maintaining the flexibility of a terminal in selecting reference signal resources in a collaborative transmission measurement scenario and avoiding waste of reference signal resources.

[0004] In a first aspect, the present application provides a communication method, which is performed by a first device, and the first device may be a communication device, or a component in the communication device (such as a processor, a chip, or a chip system, etc.), or a logic module that can implement all or part of the functions of the communication device. For example, the first device may be a network device (such as a base station, a transmission receiving point or a central node, and the central node can obtain information of multiple transmission receiving points), or a component of a network device, or a logic module that can implement all or part of the functions of a network device. Among them, the first device sends a first indication information, and the first indication information is used to indicate N first reference signal resources, and the N first reference signal resources are used for the first coordinated transmission measurement. The first device receives a second indication information, and the second indication information is used to indicate the M first reference signal resources selected by the terminal from the N first reference signal resources. The first device sends a third indication information, and the third indication information is used to indicate M second reference signal resources, and the M first reference signal resources are associated with M second reference signal resources, and the M second reference signal resources are used for the second coordinated transmission measurement; M is less than or equal to N, and M and N are positive integers.

[0005] In this method, the first device can configure multiple sets of reference signal resources; one set includes N first reference signal resources, and the N first reference signal resources only need to be activated once (for example, the N first reference signal resources configured for the first time are used for the first collaborative transmission measurement, and the N first reference signal resources are released after the measurement is completed); the subsequent measurement process uses another set of M second reference signal resources, and the M second reference signal resources are associated with the M first reference signal resources fed back by the terminal. That is, the M second reference signal resources are determined based on the feedback of the terminal, and the terminal can select the reference signal resources during the first collaborative transmission measurement, which is conducive to maintaining the flexibility of the terminal in selecting the collaborative set (different collaborative sets correspond to different reference signal resources). In addition, in the subsequent measurement process, the first device does not need to configure more second reference signal resources to the second device (only configure M second reference signal resources), which can avoid the waste of reference signal resources.

[0006] In a possible implementation manner, the M first reference signal resources and the M second reference signal resources are associated with the same transmission reception point TRP set.

[0007] In the method, M first reference signal resources are associated with M second reference signal resources, and specifically, the M first reference signal resources and the M second reference signal resources are associated with the same TRP set. For example, the M first reference signal resources and the M second reference signal resources may be the same resources, and are associated with the same TRP set, which is used for the terminal to perform collaborative transmission measurements on one or more TRPs in the TRP set; or, the M first reference signal resources and the M second reference signal resources may be different resources, but are associated with the same TRP set, which is also used for the terminal to perform collaborative transmission measurements on one or more TRPs in the TRP set.

[0008] In a possible implementation manner, the first device sends fourth indication information, where the fourth indication information is used to instruct the terminal to select part or all of the first reference signal resources from N first reference signal resources to perform channel measurement.

[0009] In the method, the first device can indicate to the terminal that the terminal is allowed to select reference signal resources for channel measurement, which is conducive to ensuring the flexibility of the terminal in selecting a cooperative transmission set.

[0010] In a possible implementation manner, the first device sends fifth indication information, where the fifth indication information is used to instruct the terminal to perform channel measurement based on M second reference signal resources.

[0011] In the method, the first device can indicate to the terminal that the terminal is not allowed to select reference signal resources, thereby avoiding the terminal from repeatedly selecting reference signal resources in each collaborative transmission measurement, which is beneficial to reducing the processing complexity of the terminal.

[0012] In a possible implementation, the value of M is determined based on the number of bits that take the first value in the bit map corresponding to the second indication information.

[0013] In the method, the second indication information may specifically include a bitmap, and the first device determines the M first reference signal resources selected by the terminal based on the bitmap, and each first reference signal resource corresponds to a bit. If the bit value is the first value, it means that the terminal selects the first reference signal resource corresponding to the bit; if the bit value is the second value, it means that the terminal does not select the first reference signal resource corresponding to the bit. The first value and the second value can be 1 and 0, or 0 and 1, respectively, and this application does not limit it.

[0014] In a possible implementation, within a preset time period, the N first reference signal resources are non-periodic resources and are activated only once; and the M second reference signal resources are periodic or semi-persistent resources and are used to perform one or more collaborative transmission measurements.

[0015] In the method, within a preset time period, N first reference signal resources are activated only once, for example, they are released after use, which helps to avoid waste of reference signal resources; M second reference signal resources can be used for one or more collaborative transmission measurements, for example, within a preset time period, the terminals can all use the M second reference signal resources, so that other reference signal resources can be used by other devices, thereby improving the resource utilization of the system.

[0016] In one possible implementation, the first device sends sixth indication information, the sixth indication information is used to indicate P first reference signal resources; the P first reference signal resources are used for third collaborative transmission measurement. The first device receives seventh indication information, the seventh indication information is used to indicate Q first reference signal resources selected by the terminal from the P first reference signal resources. The first device sends eighth indication information, the eighth indication information is used to indicate Q second reference signal resources, the Q first reference signal resources are associated with Q second reference signal resources, the Q second reference signal resources are used for fourth collaborative transmission measurement; Q is less than or equal to P, and Q and P are positive integers.

[0017] In this method, if the set of transmission receiving points corresponding to the collaborative transmission measurement changes, the first device can reconfigure P first reference signal resources, and instruct the terminal to select Q first reference signal resources from the P first reference signal resources, so as to use new reference signal resources and a new set of transmission receiving points to perform collaborative transmission measurement, thereby avoiding waste of reference signal resources.

[0018] In a possible implementation, before the first device sends the sixth indication information, it receives a second message; the second message is used to indicate updating the collaborative transmission set.

[0019] In this method, the terminal may send indication information (such as a second message) to indicate that the first device needs to update the cooperative transmission set, so that the first device reconfigures the reference signal resources.

[0020] In a possible implementation manner, the first device sends ninth indication information, where the ninth indication information is used to instruct the terminal to select part or all of the first reference signal resources from P first reference signal resources to perform channel measurement.

[0021] In this method, the ninth indication information has a function similar to the fourth indication information mentioned above, and is used to indicate to the terminal that the terminal is allowed to select reference signal resources for channel measurement, which is conducive to ensuring the flexibility of the terminal in selecting a collaborative transmission set.

[0022] In a possible implementation manner, the first device sends tenth indication information, where the tenth indication information is used to instruct the terminal to perform channel measurement based on Q second reference signal resources.

[0023] In this method, the tenth indication information has a similar function to the fifth indication information mentioned above, and is used to indicate to the terminal that the terminal is not allowed to select reference signal resources, which is beneficial to reducing the processing complexity of the terminal and can also avoid wasting the reference signal resources sent by the first device.

[0024] In a possible implementation, one or more of the first indication information, the third indication information, the fourth indication information, the fifth indication information, the sixth indication information, the eighth indication information, the ninth indication information or the tenth indication information are carried in a first message, and the first message includes a radio resource control (RRC) message, downlink control information (DCI), and a media access control element (MAC (media access control) control element, MAC CE).

[0025] In a second aspect, the present application provides a communication method, which is performed by a second device, or by a component of the second device (such as a processor, a chip, or a chip system, etc.), or by a logic module that can implement all or part of the functions of the second device. For example, the second device can be a terminal, or a component of a terminal, or a logic module that can implement all or part of the functions of the terminal. Among them, the second device receives first indication information, and the first indication information is used to indicate N first reference signal resources, and the N first reference signal resources are used for first cooperative transmission measurement. The second device sends second indication information, and the second indication information is used to indicate M first reference signal resources selected by the terminal from the N first reference signal resources. The second device receives third indication information, and the third indication information is used to indicate M second reference signal resources, and the M first reference signal resources are associated with M second reference signal resources, and the M second reference signal resources are used for second cooperative transmission measurement; M is less than or equal to N, and M and N are positive integers.

[0026] In this method, the second device can receive multiple sets of reference signal resources; one set includes N first reference signal resources, and the N first reference signal resources only need to be activated once (for example, the N first reference signal resources configured for the first time are used for the first collaborative transmission measurement, and the N first reference signal resources are released after the measurement is completed); the subsequent measurement process uses another set of M second reference signal resources, and the M second reference signal resources are associated with the M first reference signal resources fed back by the second device. That is, the M second reference signal resources are determined based on the feedback of the second device, and the second device can select the reference signal resources during the first collaborative transmission measurement, which is conducive to maintaining the flexibility of the second device in selecting the collaborative set (different collaborative sets correspond to different reference signal resources). In addition, in the subsequent measurement process, the first device does not need to configure more second reference signal resources to the second device (only configure M second reference signal resources), which can avoid the waste of reference signal resources.

[0027] In a possible implementation manner, the M first reference signal resources and the M second reference signal resources are associated with the same transmission reception point TRP set.

[0028] In the method, M first reference signal resources are associated with M second reference signal resources, and specifically, the M first reference signal resources and the M second reference signal resources are associated with the same TRP set. For example, the M first reference signal resources and the M second reference signal resources may be the same resources, and are associated with the same TRP set, which is used for the terminal to perform collaborative transmission measurements on one or more TRPs in the TRP set; or, the M first reference signal resources and the M second reference signal resources may be different resources, but are associated with the same TRP set, which is also used for the terminal to perform collaborative transmission measurements on one or more TRPs in the TRP set.

[0029] In a possible implementation manner, the second device receives fourth indication information, where the fourth indication information is used to instruct the terminal to select part or all of the first reference signal resources from N first reference signal resources to perform channel measurement.

[0030] In this method, the second device can select appropriate reference signal resources for collaborative transmission measurement and feedback, which is conducive to ensuring the flexibility of selecting a collaborative set.

[0031] In a possible implementation manner, the second device receives fifth indication information, where the fifth indication information is used to instruct the terminal to perform channel measurement based on M second reference signal resources.

[0032] In this method, the second device only needs to perform channel measurement based on the reference signal resource indicated by the fifth indication information, thereby avoiding the second device from repeatedly selecting reference signal resources during each collaborative transmission measurement, which is beneficial to reducing processing complexity.

[0033] In a possible implementation, the value of M is determined based on the number of bits that take the first value in the bit map corresponding to the second indication information.

[0034] In a possible implementation, within a preset time period, the N first reference signal resources are non-periodic resources and are activated only once; and the M second reference signal resources are periodic or semi-persistent resources and are used to perform one or more collaborative transmission measurements.

[0035] In the method, within a preset time period, N first reference signal resources are activated only once, for example, they are released after use, which helps to avoid waste of reference signal resources; M second reference signal resources can be used for one or more collaborative transmission measurements, for example, within a preset time period, the terminals can all use the M second reference signal resources, so that other reference signal resources can be used by other devices, thereby improving the resource utilization of the system.

[0036] In one possible implementation, the second device receives sixth indication information, the sixth indication information is used to indicate P first reference signal resources; the P first reference signal resources are used for third collaborative transmission measurement. The second device sends seventh indication information, the seventh indication information is used to indicate Q first reference signal resources selected by the terminal from the P first reference signal resources. The second device receives eighth indication information, the eighth indication information is used to indicate Q second reference signal resources, the Q first reference signal resources are associated with Q second reference signal resources, the Q second reference signal resources are used for fourth collaborative transmission measurement; Q is less than or equal to P, and Q and P are positive integers.

[0037] In this method, if the set of transmission receiving points corresponding to the collaborative transmission measurement changes, the second device can re-receive P first reference signal resources, and can select Q first reference signal resources from the P first reference signal resources, so as to use new reference signal resources and a new set of transmission receiving points to perform collaborative transmission measurement, thereby avoiding waste of reference signal resources.

[0038] In a possible implementation, the second device sends a second message before receiving the sixth indication information; the second message is used to indicate updating the collaborative transmission set.

[0039] In the method, the terminal may send indication information (such as a second message) to indicate to the first device that the cooperative transmission set needs to be updated.

[0040] In a possible implementation manner, the first device receives ninth indication information, where the ninth indication information is used to instruct the terminal to select part or all of the first reference signal resources from P first reference signal resources to perform channel measurement.

[0041] In this method, the ninth indication information has a similar function to the fourth indication information mentioned above. The second device can select appropriate reference signal resources for collaborative transmission measurement and feedback, which is conducive to ensuring the flexibility of the terminal in selecting a collaborative set.

[0042] In a possible implementation manner, the first device receives tenth indication information, where the tenth indication information is used to instruct the terminal to perform channel measurement based on Q second reference signal resources.

[0043] In this method, the tenth indication information has a similar function to the fifth indication information mentioned above. The second device only needs to perform channel measurement based on the reference signal resources indicated by the tenth indication information, without the need for additional selection of a collaboration set, which is beneficial to reducing the processing complexity of the terminal.

[0044] In a possible implementation manner, one or more of the first indication information, the third indication information, the fourth indication information, the fifth indication information, the sixth indication information, the eighth indication information, the ninth indication information or the tenth indication information are carried in a first message, and the first message includes one or more of a radio resource control RRC message, downlink control information DCI, and a media access control element MACCE.

[0045] In a third aspect, the present application provides a communication device. The communication device may be a network device, or a device in a network device, or a device that can be used in conjunction with a network device. In a possible implementation, the communication device may include a functional module, and the functional module may be a hardware circuit, or software, or a combination of a hardware circuit and software.

[0046] In a possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is used to send a first indication information, the first indication information is used to indicate N first reference signal resources, and the N first reference signal resources are used for a first collaborative transmission measurement. The communication unit is also used to receive a second indication information, the second indication information is used to indicate M first reference signal resources selected by the terminal from the N first reference signal resources. The communication unit is also used to send a third indication information, the third indication information is used to indicate M second reference signal resources, the M first reference signal resources are associated with the M second reference signal resources, and the M second reference signal resources are used for a second collaborative transmission measurement; M is less than or equal to N, and M and N are positive integers.

[0047] In a possible implementation manner, the M first reference signal resources and the M second reference signal resources are associated with the same transmission reception point TRP set.

[0048] In a possible implementation manner, the communication unit is further used to send fourth indication information, where the fourth indication information is used to instruct the terminal to select part or all of the first reference signal resources from the N first reference signal resources to perform channel measurement.

[0049] In a possible implementation manner, the communication unit is further used to send fifth indication information, where the fifth indication information is used to instruct the terminal to perform channel measurement based on M second reference signal resources.

[0050] In a possible implementation, the value of M is determined based on the number of bits that take the first value in the bit map corresponding to the second indication information.

[0051] In a possible implementation, within a preset time period, the N first reference signal resources are non-periodic resources and are activated only once; and the M second reference signal resources are periodic or semi-persistent resources and are used to perform one or more collaborative transmission measurements.

[0052] In a possible implementation, the communication unit is further used to send sixth indication information, the sixth indication information is used to indicate P first reference signal resources; the P first reference signal resources are used for the third collaborative transmission measurement. The communication unit is also used to receive seventh indication information, the seventh indication information is used to indicate Q first reference signal resources selected by the terminal from the P first reference signal resources. The communication unit is also used to send eighth indication information, the eighth indication information is used to indicate Q second reference signal resources, the Q first reference signal resources are associated with Q second reference signal resources, the Q second reference signal resources are used for the fourth collaborative transmission measurement; Q is less than or equal to P, and Q and P are positive integers.

[0053] In a possible implementation manner, the communication unit is further configured to receive a second message before sending the sixth indication information; the second message is used to indicate updating of the collaborative transmission set.

[0054] In a possible implementation manner, the communication unit is further used to send ninth indication information, where the ninth indication information is used to instruct the terminal to select part or all of the first reference signal resources from the P first reference signal resources to perform channel measurement.

[0055] In a possible implementation manner, the communication unit is further used to send tenth indication information, where the tenth indication information is used to instruct the terminal to perform channel measurement based on Q second reference signal resources.

[0056] In a possible implementation manner, one or more of the first indication information, the third indication information, the fourth indication information, the fifth indication information, the sixth indication information, the eighth indication information, the ninth indication information or the tenth indication information are carried in a first message, and the first message includes one or more of a radio resource control RRC message, downlink control information DCI, and a media access control element MACCE.

[0057] In a possible implementation, the processing unit is used to process information sent or received by the communication unit. For example, the processing unit is used to process the second indication information received by the communication unit, and determines that the second device selects M first reference signal resources, then the processing unit can determine M second reference signal resources, and the M second reference signal resources are associated with the M first reference signal resources.

[0058] In a fourth aspect, the present application provides a communication device. The communication device may be a terminal, or a device in a terminal, or a device that can be used in conjunction with a terminal. In a possible implementation, the communication device may include a functional module, and the functional module may be a hardware circuit, or software, or a combination of a hardware circuit and software.

[0059] In a possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is used to receive first indication information, the first indication information is used to indicate N first reference signal resources, and the N first reference signal resources are used for first collaborative transmission measurement. The communication unit is also used to send second indication information, the second indication information is used to indicate M first reference signal resources selected by the terminal from the N first reference signal resources. The communication unit is also used to receive third indication information, the third indication information is used to indicate M second reference signal resources, the M first reference signal resources are associated with M second reference signal resources, and the M second reference signal resources are used for second collaborative transmission measurement; M is less than or equal to N, and M and N are positive integers.

[0060] In a possible implementation manner, the M first reference signal resources and the M second reference signal resources are associated with the same transmission reception point TRP set.

[0061] In a possible implementation, the communication unit is further used to receive fourth indication information, where the fourth indication information is used to instruct the terminal to select part or all of the first reference signal resources from the N first reference signal resources to perform channel measurement.

[0062] In a possible implementation manner, the communication unit is further used to receive fifth indication information, where the fifth indication information is used to instruct the terminal to perform channel measurement based on M second reference signal resources.

[0063] In a possible implementation, the value of M is determined based on the number of bits that take the first value in the bit map corresponding to the second indication information.

[0064] In a possible implementation, within a preset time period, the N first reference signal resources are non-periodic resources and are activated only once; and the M second reference signal resources are periodic or semi-persistent resources and are used to perform one or more collaborative transmission measurements.

[0065] In a possible implementation, the communication unit is further used to receive sixth indication information, the sixth indication information is used to indicate P first reference signal resources; the P first reference signal resources are used for the third collaborative transmission measurement. The communication unit is also used to send seventh indication information, the seventh indication information is used to indicate Q first reference signal resources selected by the terminal from the P first reference signal resources. The communication unit is also used to receive eighth indication information, the eighth indication information is used to indicate Q second reference signal resources, the Q first reference signal resources are associated with Q second reference signal resources, the Q second reference signal resources are used for the fourth collaborative transmission measurement; Q is less than or equal to P, and Q and P are positive integers.

[0066] In a possible implementation manner, the communication unit is further configured to send a second message before receiving the sixth indication information; the second message is used to indicate updating of the collaborative transmission set.

[0067] In a possible implementation, the communication unit is further used to receive ninth indication information, where the ninth indication information is used to instruct the terminal to select part or all of the first reference signal resources from the P first reference signal resources to perform channel measurement.

[0068] In a possible implementation manner, the communication unit is further used to receive tenth indication information, where the tenth indication information is used to instruct the terminal to perform channel measurement based on Q second reference signal resources.

[0069] In a possible implementation manner, one or more of the first indication information, the third indication information, the fourth indication information, the fifth indication information, the sixth indication information, the eighth indication information, the ninth indication information or the tenth indication information are carried in a first message, and the first message includes one or more of a radio resource control RRC message, downlink control information DCI, and a media access control element MACCE.

[0070] In a possible implementation, the processing unit is used to process information sent or received by the communication unit. For example, the processing unit is used to process the first indication information received by the communication unit, and determines that the first device is configured with N first reference signal resources, then the processing unit can select M first reference signal resources from the N first reference signal resources for collaborative transmission measurement.

[0071] For the third and fourth aspects, as an example, the processing unit may be a processor, and the communication unit may be a transceiver unit, a transceiver, or a communication interface. It is understandable that when the communication device is a communication device (such as a terminal or a network device), the communication unit may be a transceiver in the communication device (for example, the transceiver includes a transmitter and a receiver), such as implemented by an antenna, a feeder, and a codec in the communication device, or, if the communication device is a chip provided in the device, the processing unit may be a processing circuit, a logic circuit, etc. of the chip, and the communication unit may be an input / output interface of the chip, such as an input / output circuit, a pin, etc.

[0072] In a fifth aspect, the present application provides a communication device, comprising: a processor, configured to execute instructions; optionally, the communication device further comprises a memory, the memory being configured to store the instructions, and when the instructions are executed by the processor, the communication device implements the method in any possible implementation of the first and second aspects, and the first and second aspects. Optionally, the processor and the memory are coupled.

[0073] In a sixth aspect, the present application provides a communication system, which includes multiple devices or equipment in the above-mentioned third to fifth aspects, so that the devices or equipment execute the first aspect and the second aspect, and the method in any possible implementation of the first aspect and the second aspect.

[0074] In a seventh aspect, the present application provides a computer-readable storage medium storing instructions, which, when executed on a computer, enables the computer to execute the method in the first aspect and the second aspect, as well as any possible implementation of the first aspect and the second aspect.

[0075] In an eighth aspect, the present application provides a computer program product, comprising instructions, which, when executed on a computer, enable the computer to execute the method in the first aspect and the second aspect, and any possible implementation of the first aspect and the second aspect.

[0076] In a ninth aspect, the present application provides a chip comprising a processor (or a logic circuit). Optionally, the chip may also include a communication interface (or interface) for implementing the above-mentioned first and second aspects, and the method in any possible implementation of the first and second aspects. In a possible implementation, if the chip is the smallest processing unit in the whole machine, the chip may be a processor, or may include a processor and a memory, or may include a processor, a memory and a transceiver, for implementing the above-mentioned first and second aspects, and the method in any possible implementation of the first and second aspects.

[0077] In a tenth aspect, the present application provides a chip system. The chip system includes a processor and an interface. Optionally, it may also include a memory for implementing the above-mentioned first and second aspects, and the method in any possible implementation of the first and second aspects. The chip system may be composed of a chip, or may include a chip and other discrete devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 A schematic diagram of a communication system provided for this application;

[0079] Figure 2 A schematic diagram of a process of performing CSI measurement for a network device and a base station;

[0080] Figure 3 A flow chart of a communication method provided by the present application;

[0081] Figure 4 A schematic diagram of a communication method provided in the present application applied to a CJT CSI collaborative transmission measurement scenario;

[0082] Figure 5 A schematic diagram of a communication device provided for this application;

[0083] Figure 6 A schematic diagram of another communication device provided in the present application. DETAILED DESCRIPTION

[0084] In the embodiments of the present application, " / " can indicate that the objects associated before and after are in an "or" relationship, for example, A / B can indicate A or B; "and / or" can be used to describe that there are three relationships between the associated objects, for example, A and / or B can indicate: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In order to facilitate the description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" can be used to distinguish between technical features with the same or similar functions. The words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not necessarily limit the difference. In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations, and any embodiment or design described as "exemplary" or "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or design. The use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way for easy understanding.

[0085] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0086] In order to maintain the flexibility of the terminal in selecting reference signal resources and avoid wasting reference signal measurement resources, the present application provides a communication method, which configures at least two sets of reference signal measurement resources, which can maintain the flexibility of the terminal in selecting a collaborative transmission set; and one set of reference signal measurement resources is configured based on the feedback of the terminal, which is beneficial to avoid wasting reference signal measurement resources during subsequent periodic or semi-periodic measurements.

[0087] Among them, the communication method provided by this application can be applied to Figure 1 In the communication system shown. For example, the communication system includes a network device and a terminal, Figure 1 The description is only made by taking multiple network devices (such as network devices 1-3) and multiple terminals (such as terminals 1-3) as an example, and the present application does not limit the number of network devices and terminals.

[0088] Among them, the communication system of the present application may include but is not limited to communication systems of various radio access technologies (radio access technology, RAT), for example, it may be: narrowband Internet of things system (narrow band-Internet of things, NB-IoT), long term evolution (long term evolution, LTE) communication system, it may also be a 5G (or called new wireless (new radio, NR)) communication system, it may also be a transition system between the LTE communication system and the 5G communication system, the transition system may also be called a 4.5G communication system, and of course it may also be a future communication system, such as the sixth generation (6th generation, 6G) or even the seventh generation (7th generation, 7G) system, etc. Optionally, the communication system of the present application may also be a single-hop or multi-hop relay system including a relay node. The relay may be in the form of a network device or terminal as described above. This application can be used in high-frequency scenarios, such as millimeter wave scenarios, and can also be used in low-frequency sub-6G scenarios, such as 700 / 900 megahertz (MHz), 2.1 / 2.6 / 3.5 gigahertz (GHz) frequency bands, etc. The network architecture and service scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. It is known to those skilled in the art that with the evolution of the communication network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0089] Among them, the terminal, also known as terminal equipment (terminal), user equipment (UE), mobile station (MS), mobile terminal (MT), etc., refers to a device that provides voice and / or data connectivity to users. For example, a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: mobile phones, tablet computers, laptops, PDAs, mobile internet devices (MID), wearable devices, drones, 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, terminals in 5G networks, terminals in future evolving networks, or terminals in future communication systems, etc. Optionally, the method provided in the present application can be applied to a terminal in an activated state, a terminal in an inactive state or an idle state, or a terminal that is not in the above three states, such as a terminal that is not attached to the network or is not synchronized with the network downlink.

[0090] The network device of the present application refers to a radio access network (RAN) node (or device) that connects a terminal to a wireless network, and may also be referred to as a base station. For example, some examples of RAN nodes are: a gNB, a transmission reception point (TRP), an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home evolved NodeB (e.g., home NodeB, or home Node B, HNB), a base band unit (BBU), or a wireless fidelity (Wifi) access point (AP), a satellite in a satellite communication system, a wireless controller in a cloud radio access network (CRAN) scenario, a wearable device, a drone, or a device in an Internet of Vehicles (e.g., vehicle to everything (V2X)), or a communication device in device to device (D2D) communication, etc.

[0091] In one possible implementation, the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node. The RAN device including the CU node and the DU node splits the protocol layer of the eNB in ​​the long term evolution (LTE) system, places the functions of some protocol layers in the CU for centralized control, and distributes the functions of the remaining part or all of the protocol layers in the DU, which is centrally controlled by the CU. In some deployments of network devices, the CU can also be divided into a CU-control plane (CP) and a CU-user plane (UP), etc. In another possible implementation, the network device may also be an antenna unit (radiounit, RU), etc. In another possible implementation, the network device may also be an open radio access network (ORAN) architecture, etc., and the present application does not limit the specific type of the network device. Exemplarily, when the network device is an ORAN architecture, the network device shown in the embodiment of the present application may be an access network device in the ORAN, or a module in the access network device, etc. In the ORAN system, CU can also be called an open centralized unit (open CU, O-CU), DU can also be called an open distributed unit (O-DU), CU-DU can also be called an open centralized unit-distributed unit (O-CU-DU), CU-UP can also be called an open centralized unit-control plane (O-CU-UP), and RU can also be called an open antenna unit (O-RU).

[0092] Optionally, the signaling interaction involved in the present application may include but is not limited to one or more of the following: radio resource control (RRC) signaling interaction, medium access control (MAC) signaling interaction, physical layer (PHY) signaling and data interaction, etc. For example, RRC signaling interaction includes sending and receiving RRC signaling; MAC signaling interaction includes sending and receiving MAC-CE signaling; PHY signaling and data interaction includes sending and receiving uplink / downlink control signaling, and / or sending and receiving uplink / downlink data.

[0093] It should be noted that:

[0094] "Sending" and "receiving" in the embodiments of the present application indicate the direction of signal transmission. For example, "sending information to the terminal" can be understood as the destination end of the information is the terminal device, which can include direct sending through the air interface, and also includes indirect sending by other units or modules through the air interface. "Receiving information from a network device" can be understood as the source end of the information is the network device, which can include directly receiving from the network device through the air interface, and also includes indirectly receiving from the network device through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface.

[0095] In other words, sending and receiving can be performed between devices, for example, between a network device and a terminal device, or can be performed within a device, for example, sending or receiving between components, modules, chips, software modules, or hardware modules within the device through a bus, wiring, or interface.

[0096] It is understandable that information may be processed between the source and destination of information transmission, such as coding, modulation, etc., but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated.

[0097] In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the indication information described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated may also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated; it may also be possible to indicate only a part of the information to be indicated, while the other part of the information to be indicated is known or agreed in advance, for example, the indication of specific information can be realized by means of the arrangement order of each information agreed in advance (such as predefined by the protocol), thereby reducing the indication overhead to a certain extent. The present application does not limit the specific method of indication. It is understandable that, for the sender of the indication information, the indication information can be used to indicate the information to be indicated, and for the receiver of the indication information, the indication information can be used to determine the information to be indicated.

[0098] 1. To facilitate understanding, the definitions of relevant terms involved in this application are introduced in detail below.

[0099] 1. Channel state information (CSI) measurement:

[0100] In 5G communication systems, the use of massive multiple input multiple output (Massive MIMO) technology is conducive to improving the spectrum efficiency of the system. When using MIMO technology, modulation coding and signal precoding are required when the base station sends data to the terminal. However, how the base station sends data to the terminal (for example, which modulation and coding scheme to use, which time and frequency domain resources to use, etc.) is determined based on the CSI fed back by the terminal to the base station, so CSI will affect the performance of the system.

[0101] For example, Figure 2 A schematic diagram of a process of performing CSI measurement for a network device and a base station may include the following steps:

[0102] Step 1: The network device sends channel measurement configuration information to the terminal. The channel measurement configuration information is used for channel measurement configuration, such as indicating the channel measurement time to the terminal.

[0103] Step 2: The network device sends a channel state information reference signal (CSI-RS) to the terminal. The pilot is used for channel measurement. For example, the terminal receives the CSI-RS and performs measurements based on the CSI-RS to obtain CSI feedback information. Optionally, the CSI-RS can also be called a pilot.

[0104] Step 3: The terminal sends channel state information to the network device. For example, the terminal sends channel state information such as channel rank indicator (RI), channel quality indicator (CQI), and precoding matrix indicator (PMI) to the network device.

[0105] Step 4: The network device sends data to the terminal based on the CSI. The network device determines the precoding information for sending the service data according to the CSI fed back by the terminal, so as to transmit the service data. For example, the network device determines the number of streams for data transmission with the terminal according to the channel rank indication RI fed back by the terminal. For another example, the network device determines the modulation order and channel coding code rate used for data transmission with the terminal according to the channel state indication CQI fed back by the terminal. For another example, the network device determines the precoding matrix used for data transmission with the terminal according to the precoding matrix indication PMI fed back by the terminal.

[0106] 2. Collaborative transmission measurement:

[0107] In order to improve the system throughput performance and user experience, a multi-station collaboration method can be used to allow multiple TRPs to provide services for one terminal. The multi-station collaboration method may include but is not limited to: coherent joint transmission (CJT), non-coherent joint transmission (NCJT), etc. For example, in the CJT collaboration method, multiple TRPs provide services to the terminal at the same time, and the transmission of multiple TRPs is transparent to the terminal; that is, from the perspective of the terminal, multiple TRPs in the collaborative transmission set can be equivalent to a large base station. Therefore, the terminal needs to jointly feedback the channel state information of each TRP in the collaborative transmission set to enable coherent collaborative transmission.

[0108] Specifically, the high-precision codebooks in the current protocol standards are all based on the measurement assumption of a single TRP. For example, when the terminal performs CSI measurement, it is assumed that the subsequent data transmission comes from one TRP, and the TRP is associated with a non-zero power channel state information reference signal (NZP CSI-RS) resource in a NZP CSI-RS resource set. The NZP CSI-RS resource can be used as a channel measurement resource (CMR); the terminal can complete CSI measurement and feedback on the pre-configured CMR and its corresponding interference measurement resource (IMR). Among them, each NZP CSI-RS resource does not exceed 32 ports. In order to adapt to collaborative transmission measurements, the current relevant protocol standards have enhanced CSI measurements, discussed the CJT codebook, and supported CSI measurement feedback of CJT. For example, assuming that one CMR supports multiple CSI-RS resources including one CSI-RS resource set associated with multiple TRPs (for example, assuming that the number of multiple TRPs is less than or equal to 4) for CJT CSI measurement, one CSI-RS resource is associated with one TRP or TRP group. The terminal can select some or all of the multiple CSI-RS resources and jointly feed back the joint CSI of some or all of the CSI-RS resources through the CJT codebook.

[0109] For the same set of CSI-RS measurement resources, the network equipment can be configured through RRC signaling, but it is impossible to flexibly modify the configured CSI-RS resources in a short time. For example, if the network equipment is always configured to not allow the terminal to select reference signal resources, the flexibility of the terminal equipment is lost, the downlink channel measurement information of the terminal equipment is not fully utilized, and the CSI feedback performance is limited; if the network equipment is always configured to allow the terminal to select reference signal resources, the terminal needs to perform CSI-RS resource selection every time CSI-RS measurement is performed, the terminal processing complexity is high, and if the terminal finally selects the joint CSI report corresponding to some CSI-RS resources, there is a waste of CSI-RS measurement resources.

[0110] 2. Communication method provided by this application:

[0111] In the communication method provided in the present application, the network device configures multiple sets of reference signal resources multiple times and separately, which is beneficial to maintaining the flexibility of the terminal in selecting reference signal resources in a collaborative transmission measurement scenario and avoiding waste of reference signal resources.

[0112] For example, Figure 3 A flow chart of a communication method provided by the present application. The method can be implemented by interaction between a first device and a second device, the first device is, for example, a network device or a device of a network device, and the second device is, for example, a terminal or a device of a terminal. Optionally, the first device is a central node, and can obtain information about each TRP in the TRP set in which it is located. The method includes the following steps:

[0113] S101, a first device sends first indication information, where the first indication information is used to indicate N first reference signal resources; correspondingly, a second device receives the first indication information.

[0114] Among them, the first reference signal resource is also called a candidate reference signal resource. For example, the N first reference signal resources are N candidate reference signal resources for the first collaborative transmission measurement. Assuming that the number of TRPs participating in the first collaborative transmission measurement is 4 (such as TRP1-TRP4), and each TRP corresponds to a first reference signal resource, the number of first reference signal resources N=4. That is, the N first reference signal resources are used for the first collaborative transmission measurement, and the first collaborative transmission measurement includes N TRPs, and there is a one-to-one correspondence between the N TRPs and the N first reference signal resources.

[0115] Optionally, the standard protocol may specify whether the terminal is allowed to select reference signal resources by default. In one possible implementation, assuming that the protocol specifies that the terminal is not allowed to select reference signal resources by default, in this implementation, the first device may send fourth indication information, and the fourth indication information is used to instruct the terminal to select part or all of the first reference signal resources from N first reference signal resources for channel measurement. For example, the first device may configure N first reference signal resources for CJT CSI measurement. The first device may instruct the terminal to select M first reference signal resources from N first reference signal resources for CJT CSI measurement through the fourth indication information, and specifically M may be configured to be less than or equal to N (that is, the terminal may select part or all of the first reference signal resources from N first reference signal resources). Alternatively, the fourth indication information may also be expressed as: the fourth indication information is used to indicate that the terminal is allowed to select reference signal resources, for example, the number of first reference signal resources fed back by the terminal may be less than or equal to N indicated by the first indication information. In another possible implementation, assuming that the protocol specifies that the terminal is allowed to select reference signal resources by default, in this implementation, the first device may not send the fourth indication information. After the terminal receives the RRC message including the first indication information, the terminal may select a reference signal resource by default. For example, the terminal selects M first reference signal resources from N first reference signal resources to perform CJT CSI measurement.

[0116] Optionally, within a preset time period, the N first reference signal resources are aperiodic resources and are activated only once. For example, the first device may configure a resource set including N aperiodic CSI-RS resources for CJT CSI measurement.

[0117] Optionally, the first indication information and / or the fourth indication information is carried in a first message, and the first message includes one or more of a radio resource control RRC message, downlink control information DCI, and a media access control element MAC CE.

[0118] S102, the second device sends second indication information, where the second indication information is used to indicate M first reference signal resources selected by the terminal from the N first reference signal resources; correspondingly, the first device receives the second indication information.

[0119] For example, the second device sends uplink control information (UCI), which includes CSI and / or second indication information; correspondingly, the first device receives the uplink control information. In this example, the second indication information may also be referred to as CSI-RS resource selection indication information, which is used to indicate the M CSI-RS resources selected by the second device.

[0120] Optionally, after receiving the second indication information, the first device may reconfigure a resource set including M second reference signal resources based on the second indication information. For example, the first device determines that the terminal has selected M first reference signal resources based on the second indication information. Assuming that the number of TRPs participating in the first cooperative transmission measurement is 4 (such as TRP1-TRP4), and each TRP corresponds to a first reference signal resource, the number of first reference signal resources N=4. Assuming that the terminal selects 2 first reference signal resources from the 4 first reference signal resources (i.e., M=2), and assuming that the 2 first reference signal resources correspond to TRP1 and TRP3 (i.e., the terminal selects to perform cooperative transmission measurement with TRP1 and TRP3), the first device may reconfigure a resource set including 2 second reference signal resources. The M=2 second reference signal resources of the resource set are used for the second cooperative transmission measurement, and the second cooperative transmission measurement includes M=2 TRPs (such as TRP1 and TRP3), and there is a one-to-one correspondence between the 2 TRPs and the 2 second reference signal resources. The second collaborative transmission measurement and the first collaborative transmission measurement are different collaborative transmission measurement processes. For example, the number of TRPs involved in the collaborative transmission measurement is different.

[0121] Optionally, the M first reference signal resources are associated with the M second reference signal resources. Specifically, the M first reference signal resources are associated with the same transmission reception point TRP set as the M second reference signal resources. For example, the M second reference signal resources and the M first reference signal resources may be the same resource, or may be different resources but associated with the same M TRPs.

[0122] Optionally, the M second reference signal resources are periodic or semi-persistent resources, which are used to perform one or more collaborative transmission measurements. For example, the first device can configure a resource set including M periodic CSI-RS resources for performing one or more CJT CSI measurements, that is, the subsequent multiple CJT CSI measurements can use these M CSI-RS resources, and the second device does not need to select CSI-RS resources again, which is conducive to avoiding repeated CSI-RS resource selection and reducing the processing complexity of the second device. Alternatively, the M second reference signal resources can also be non-periodic resources, which are reconfigured at each collaborative transmission measurement.

[0123] Optionally, the value of M is determined based on the number of bits whose value is the first value in the bitmap corresponding to the second indication information. For example, the second indication information can be represented by a bitmap, and each bit corresponds to a reference signal resource. If the bit value is 1, it means that the terminal has selected the reference signal resource corresponding to the bit; if the bit value is 0, it means that the terminal has not selected the reference signal resource corresponding to the bit. Assuming that the bitmap is represented as 1010, the number of bits whose value is 1 in the bitmap is 2 (indicating that the second device has selected M=2 first reference signal resources). Optionally, the sequence number of the bit whose value is the first value in the bitmap corresponds to the sequence number of the TRP in the collaborative transmission set. For example, assuming that the bitmap is represented as 1010, the sequence numbers of the bits whose value is 1 in the bitmap are 1 and 3, corresponding to TRP1 and TRP3 in the collaborative transmission set, indicating that the second device has selected collaborative transmission with TRP1 and TRP3.

[0124] S103, the first device sends third indication information, where the third indication information is used to indicate M second reference signal resources; correspondingly, the second device receives the third indication information.

[0125] For example, the third indication information is used to indicate the M second reference signal resources configured by the first device for the second device. That is, the M second reference signal resources are configured by the first device, and may be the same as or different from the M first reference signal resources selected by the second device. The specific association relationship can be referred to the description above, which will not be repeated here.

[0126] Optionally, the standard protocol may specify whether the terminal is allowed to select reference signal resources by default. In one possible implementation, assuming that the protocol specifies that the terminal is allowed to select reference signal resources by default, then in this implementation, after the first device sends the third indication information, it may send the fifth indication information, and the fifth indication information is used to instruct the terminal to perform channel measurement based on M second reference signal resources. For example, the first device may configure M second reference signal resources for CJT CSI measurement. Through the fifth indication information, the first device may instruct the second device to use the M second reference signal resources for CJT CSI measurement. In this implementation, the second device no longer selects CSI-RS resources additionally, and only performs CSI measurement based on the M second reference signal resources configured by the first device, thereby reducing the processing complexity of the terminal. Alternatively, the fifth indication information may also be expressed as: the fifth indication information is used to indicate that the terminal is not allowed to select reference signal resources. In another possible implementation, assuming that the protocol specifies that the terminal is not allowed to select reference signal resources by default, then in this implementation, the first device may not send the fifth indication information. When the terminal receives the RRC message including the third indication information, it is assumed that the terminal cannot select the reference signal resource, and the terminal directly uses the M second reference signal resources indicated by the third indication information to perform CJT CSI measurement. Optionally, the functions of the fifth indication information and the fourth indication information are similar, and the first device can determine whether to send the fourth indication information / fifth indication information based on the terminal behavior specified in the protocol.

[0127] Optionally, the third indication information and / or the fifth indication information is carried in a first message, and the first message includes one or more of a radio resource control RRC message, downlink control information DCI, and a media access control element MAC CE.

[0128] For example, based on the description of S101-S103 above, a collaborative transmission measurement process based on multiple reference signal configurations is as follows: Figure 4 As shown in FIG. 1 , it is assumed that in the initial state, the network device is configured with a resource set containing N non-periodic CSI-RS resources for CJT CSI measurement, such as Figure 4The network device configures the terminal to select CSI-RS through RRC signaling (such as configuring M to be less than or equal to N). The terminal performs CSI measurement and CSI-RS resource selection based on CSI-RS resources. The network device receives the CSI reported by the terminal, including a CSI-RS resource selection indication (i.e., the second indication information), and reconfigures a resourceset including M CSI-RS resources according to the CSI-RS resource selection indication (i.e., Figure 4 The reference signal resource set 2 (CSI-RS resource set #2) in the network is activated, and the CSI-RSresource set #2 corresponds to the second TRP set (including TRP1 and TRP3). The network device does not allow the terminal device to select CSI-RS resources through RRC signaling configuration. In one or more subsequent collaborative transmission measurements, the terminal and the network device perform joint CSI measurements on the M TRPs corresponding to the M CSI-RS resources selected by the terminal.

[0129] Optionally, after S103, the communication method may further include the following steps:

[0130] (1) The first device sends sixth indication information, where the sixth indication information is used to indicate P first reference signal resources; correspondingly, the second device receives the sixth indication information.

[0131] The P first reference signal resources are used for the third coordinated transmission measurement. For example, the sixth indication information is similar to the first indication information described above in terms of function and specific implementation, and the specific implementation can refer to the corresponding description.

[0132] In one possible implementation, if the signal quality measured by the terminal changes, the terminal and the first device may perform a third collaborative transmission measurement. For example, when the terminal does not move, the terminal performs collaborative transmission with the second TRP set (such as TRP1 and TRP3); if the terminal moves and measures that the signal quality of the second TRP set (such as TRP1 and TRP3) has significantly decreased, the terminal may send a second message to the first device, and the second message is used to indicate that the TRP collaborative set needs to be updated, thereby triggering the first device to reconfigure the first reference signal resource. Therefore, the first device may send a sixth indication information to the terminal to indicate P first reference signal resources.

[0133] In another possible implementation, if the first device changes the scheduling of the terminal, the terminal and the first device may perform a third cooperative transmission measurement. For example, assuming that the first device originally only schedules terminal 1, and terminal 1 performs cooperative transmission with the second TRP set (such as including TRP1 and TRP3); if terminal 2 also accesses the first device, and terminal 1 and terminal 2 are related (for example, there may be interference between terminal 1 and terminal 2), the first device can send a sixth indication information to terminal 1, which is used to indicate P first reference signal resources.

[0134] Optionally, the first device may also determine whether to send ninth indication information, where the ninth indication information is used to instruct the terminal to select part or all of the first reference signal resources from the P first reference signal resources for channel measurement. It is understandable that the ninth indication information is similar to the fourth indication information described above in terms of function and specific implementation method, and will not be repeated here.

[0135] Optionally, within a preset time period, the P first reference signal resources are non-periodic resources and are activated only once. For example, the first device may configure a resource set including P non-periodic CSI-RS resources for CJT CSI measurement.

[0136] Optionally, the sixth indication information and / or the ninth indication information is carried in a first message, and the first message includes one or more of a radio resource control RRC message, downlink control information DCI, and a media access control element MAC CE.

[0137] (2) The second device sends seventh indication information, where the seventh indication information is used to indicate the Q first reference signal resources selected by the terminal from the P first reference signal resources; correspondingly, the first device receives the seventh indication information.

[0138] For example, the seventh indication information is similar to the second indication information described above in terms of function and specific implementation, and the specific implementation can refer to the corresponding description. For example, the second device sends uplink control information (UCI), which includes CSI and / or the seventh indication information; correspondingly, the first device receives the uplink control information. In this example, the seventh indication information can also be called CSI-RS resource selection indication information, which is used to indicate the Q CSI-RS resources selected by the second device.

[0139] Optionally, after receiving the seventh indication information, the first device may reconfigure a resource set including Q second reference signal resources based on the seventh indication information. For example, the first device determines that the terminal has selected Q first reference signal resources based on the seventh indication information. Assuming that the number of TRPs participating in the third cooperative transmission measurement is 5 (such as TRP1-TRP5), and each TRP corresponds to a first reference signal resource, the number of first reference signal resources P=5. Assuming that the terminal selects 3 first reference signal resources from the 5 first reference signal resources (that is, Q=3), and assuming that the 3 first reference signal resources correspond to TRP2, TRP4 and TRP5 (that is, the terminal selects to perform cooperative transmission measurement with TRP2, TRP4 and TRP5), the first device may reconfigure a resource set including 3 second reference signal resources. The Q=3 second reference signal resources of the resource set are used for the fourth cooperative transmission measurement, and the fourth cooperative transmission measurement includes Q=3 TRPs (such as TRP2, TRP4 and TRP5), and there is a one-to-one correspondence between the 3 TRPs and the 3 second reference signal resources. The fourth collaborative transmission measurement and the third collaborative transmission measurement are different collaborative transmission measurement processes. For example, the TRP sets participating in the collaborative transmission measurements of the two are different.

[0140] Optionally, the Q first reference signal resources are associated with the Q second reference signal resources. Specifically, the Q first reference signal resources are associated with the Q second reference signal resources with the same set of transmission reception points TRP. For example, the Q second reference signal resources and the Q first reference signal resources may be the same resource, or may be different resources but associated with the same Q TRPs.

[0141] Optionally, the Q second reference signal resources are periodic or semi-persistent resources, which are used to perform one or more collaborative transmission measurements. For example, the first device can configure a resource set including Q periodic CSI-RS resources for performing one or more CJT CSI measurements, that is, the Q CSI-RS resources can be used for subsequent multiple CJT CSI measurements, and the second device does not need to select CSI-RS resources again, which is conducive to avoiding repeated CSI-RS resource selection and reducing the processing complexity of the second device. Alternatively, the Q second reference signal resources can also be non-periodic resources, which are reconfigured at each collaborative transmission measurement.

[0142] Optionally, the value of Q is determined based on the number of bits whose value is the first value in the bitmap corresponding to the seventh indication information. For example, the seventh indication information can be represented by a bitmap. Assuming that the bitmap is represented as 01011, the number of bits whose value is the first value (for example, 1) in the bitmap is 3 (indicating that the second device has selected Q=3 first reference signal resources).

[0143] (3) The first device sends eighth indication information, where the eighth indication information is used to indicate Q second reference signal resources; correspondingly, the second device receives the eighth indication information.

[0144] For example, the eighth indication information is used to indicate the Q second reference signal resources that the first device reconfigures for the second device. That is, the Q second reference signal resources are configured by the first device, and may be the same as or different from the Q first reference signal resources selected by the second device. The specific association relationship can be referred to the previous description, which will not be repeated here.

[0145] Optionally, the first device may also determine whether to send a tenth indication information, the tenth indication information being used to instruct the terminal to perform channel measurement based on the Q second reference signal resources. It is understandable that the tenth indication information is similar to the function and specific implementation method of the fifth indication information described above, and will not be repeated here.

[0146] Optionally, the sixth indication information, the eighth indication information, the ninth indication information or the tenth indication information is carried in a first message, and the first message includes one or more of a radio resource control RRC message, downlink control information DCI, and a media access control element MAC CE.

[0147] In this embodiment, the first device can configure multiple sets of reference signal resources and indicate multiple sets of reference signal resources to the second device. One of the multiple sets of reference signal resources includes N first reference signal resources and only needs to be activated once (for example, the N first reference signal resources configured for the first time are used for the first collaborative transmission measurement, and the N first reference signal resources are released after the measurement is completed); the subsequent measurement process uses another set of M second reference signal resources, and the M second reference signal resources are associated with the M first reference signal resources fed back by the terminal. That is, the M second reference signal resources are determined based on the feedback of the terminal. During the first collaborative transmission measurement, the terminal can select the reference signal resources, which is conducive to maintaining the flexibility of the terminal in selecting the collaborative set (different collaborative sets correspond to different reference signal resources). In addition, during the subsequent measurement process, the first device does not need to configure more second reference signal resources to the second device (only configure M second reference signal resources), which can avoid the waste of reference signal resources.

[0148] Figure 5 A schematic diagram of a communication device provided in the present application. The device may include executing Figure 3 and Figure 4 The module corresponding to the method / operation / step / action described in any of the embodiments shown may be a hardware circuit, software, or a combination of hardware circuit and software.

[0149] The apparatus 500 includes a communication unit 501 and a processing unit 502, which are used to implement the methods executed by the devices in the above embodiments. The communication unit 501 is also called a transceiver unit, which includes a sending unit and a receiving unit. The sending unit is used to send signals, and the receiving unit is used to receive signals.

[0150] In a possible implementation, the device is a network device or a device of a network device. Specifically, the communication unit 501 is used to send a first indication information, the first indication information is used to indicate N first reference signal resources, and the N first reference signal resources are used for a first collaborative transmission measurement. The communication unit 501 is also used to receive a second indication information, the second indication information is used to indicate the M first reference signal resources selected by the terminal from the N first reference signal resources. The communication unit 501 is also used to send a third indication information, the third indication information is used to indicate M second reference signal resources, the M first reference signal resources are associated with the M second reference signal resources, and the M second reference signal resources are used for a second collaborative transmission measurement; M is less than or equal to N, and M and N are positive integers.

[0151] Optionally, the processing unit 502 is used to process information sent or received by the communication unit 501. For example, the processing unit 502 is used to process the second indication information received by the communication unit, and determines that the second device selects M first reference signal resources, then the processing unit 502 can determine M second reference signal resources, and the M second reference signal resources are associated with the M first reference signal resources.

[0152] The specific execution process of the communication unit 501 and the processing unit 502 in this implementation manner can refer to the description of the steps performed by the first device in the method embodiment above, as well as the related description, which will not be repeated here. The communication method implemented by the device can configure multiple sets of reference signal resources; one set includes N first reference signal resources, and the N first reference signal resources only need to be activated once (for example, the N first reference signal resources configured for the first time are used for the first cooperative transmission measurement, and the N first reference signal resources are released after the measurement is completed); the subsequent measurement process uses another set of M second reference signal resources, and the M second reference signal resources are associated with the M first reference signal resources fed back by the terminal. That is, the M second reference signal resources are determined based on the feedback of the terminal, and the terminal can select the reference signal resources during the first cooperative transmission measurement, which is conducive to maintaining the flexibility of the terminal in selecting the cooperative set (different cooperative sets correspond to different reference signal resources). In addition, in the subsequent measurement process, the first device does not need to configure more second reference signal resources to the second device (only configure M second reference signal resources), which can avoid the waste of reference signal resources.

[0153] In a possible implementation, the device is a terminal or a device of a terminal. Specifically, the communication unit 501 is used to receive first indication information, the first indication information is used to indicate N first reference signal resources, and the N first reference signal resources are used for first collaborative transmission measurement. The communication unit 501 is also used to send second indication information, the second indication information is used to indicate M first reference signal resources selected by the terminal from the N first reference signal resources. The communication unit 501 is also used to receive third indication information, the third indication information is used to indicate M second reference signal resources, the M first reference signal resources are associated with M second reference signal resources, and the M second reference signal resources are used for second collaborative transmission measurement; M is less than or equal to N, and M and N are positive integers.

[0154] Optionally, the processing unit 502 is used to process information sent or received by the communication unit 501. For example, the processing unit 502 is used to process the first indication information received by the communication unit 501, and determines that the first device is configured with N first reference signal resources, then the processing unit 502 can select M first reference signal resources from the N first reference signal resources for collaborative transmission measurement.

[0155] The specific execution process of the communication unit 501 and the processing unit 502 in this implementation method can refer to the description of the steps performed by the second device in the method embodiment above, as well as the related description, which will not be repeated here. In the communication method implemented by the device, the second device can receive multiple sets of reference signal resources; one set includes N first reference signal resources, and the N first reference signal resources only need to be activated once (for example, the N first reference signal resources configured for the first time are used for the first cooperative transmission measurement, and the N first reference signal resources are released after the measurement is completed); the subsequent measurement process uses another set of M second reference signal resources, and the M second reference signal resources are associated with the M first reference signal resources fed back by the second device. That is, the M second reference signal resources are determined based on the feedback of the second device, and the second device can select the reference signal resources during the first cooperative transmission measurement, which is conducive to maintaining the flexibility of the second device in selecting the cooperative set (different cooperative sets correspond to different reference signal resources). In addition, in the subsequent measurement process, the first device does not need to configure more second reference signal resources to the second device (only configure M second reference signal resources), which can avoid the waste of reference signal resources.

[0156] In a possible implementation, when the communication device is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit or a logic circuit integrated on the chip.

[0157] This application also provides a communication device, see Figure 6 , another structural diagram of the communication device of the embodiment of the present application. The communication device can be used to execute the steps executed by the first device or the second device in the above method embodiment, and reference can be made to the relevant description in the above method embodiment.

[0158] The communication device includes a processor 601. Optionally, the communication device also includes a memory 602 and a transceiver 603.

[0159] In a possible implementation, the processor 601, the memory 602 and the transceiver 603 are respectively connected via a bus, and the memory stores computer instructions.

[0160] Optionally, the processing unit 502 in the aforementioned embodiment may be the processor 601 in this embodiment, so the specific implementation of the processor 601 is not repeated. The communication unit 501 in the aforementioned embodiment may be the transceiver 603 in this embodiment, so the specific implementation of the transceiver 603 is not repeated.

[0161] In this application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in this application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in this application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0162] In the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM). The memory is any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory in the present application may also be a circuit or any other device that can implement a storage function, for storing program instructions and / or data.

[0163] The present application provides another communication device, which includes a processor and an interface. Optionally, it also includes a memory, the processor is coupled to the memory, and the processor is used to read and execute computer instructions stored in the memory to implement the following Figure 3 and Figure 4 The communication method in the embodiment shown.

[0164] The present application also provides a communication system, which includes a first device and a second device. The first device is used to execute all or part of the steps executed by the first device in the above embodiment. The second device is used to execute all or part of the steps executed by the second device in the above embodiment.

[0165] The present application provides a computer-readable storage medium. The computer-readable storage medium stores a program or instruction. When the program or instruction is executed on a computer, the computer executes Figure 3 and Figure 4 The communication method in the embodiment shown.

[0166] The present application provides a computer program product. The computer program product includes instructions. When the instructions are executed on a computer, the computer executes the following Figure 3 and Figure 4 The communication method in the embodiment shown.

[0167] The present application provides a chip or a chip system, which includes at least one processor and an interface, wherein the interface and the at least one processor are interconnected through a line, and the at least one processor is used to run a computer program or instruction to execute the following steps: Figure 3 and Figure 4 The communication method in the embodiment shown.

[0168] The interface in the chip may be an input / output interface, a pin or a circuit, etc.

[0169] The chip system may be a system on chip (SOC) or a baseband chip, etc., wherein the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, etc.

[0170] In one implementation, the chip or chip system described above in the present application further includes at least one memory, in which instructions are stored. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

[0171] The technical solution provided in this application can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in this application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal or other programmable device. The computer instructions 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 instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. 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. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium, etc.

[0172] In the present application, under the premise of no logical contradiction, the various embodiments may reference each other, for example, the methods and / or terms between method embodiments may reference each other, for example, the functions and / or terms between device embodiments may reference each other, for example, the functions and / or terms between device embodiments and method embodiments may reference each other.

[0173] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: include: Sending first indication information, where the first indication information is used to indicate N first reference signal resources, where the N first reference signal resources are used for first coordinated transmission measurement; receiving second indication information, where the second indication information is used to indicate M first reference signal resources selected by the terminal from the N first reference signal resources; Send third indication information, where the third indication information is used to indicate M second reference signal resources, where the M first reference signal resources are associated with the M second reference signal resources, and where the M second reference signal resources are used for second collaborative transmission measurement; where M is less than or equal to N, and M and N are positive integers.

2. The method according to claim 1, characterized in that The M first reference signal resources and the M second reference signal resources are associated with the same transmission reception point TRP set.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: Send fourth indication information, where the fourth indication information is used to instruct the terminal to select part or all of the first reference signal resources from the N first reference signal resources to perform channel measurement.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Send fifth indication information, where the fifth indication information is used to instruct the terminal to perform channel measurement based on the M second reference signal resources.

5. The method according to any one of claims 1 to 4, characterized in that: The value of M is determined based on the number of bits in the bitmap corresponding to the second indication information that take the first value.

6. The method according to any one of claims 1 to 5, characterized in that: In a preset time period, the N first reference signal resources are non-periodic resources and are activated only once; the M second reference signal resources are periodic or semi-persistent resources and are used to perform one or more coordinated transmission measurements.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: Sending sixth indication information, where the sixth indication information is used to indicate P first reference signal resources; the P first reference signal resources are used for third coordinated transmission measurement; receiving seventh indication information, where the seventh indication information is used to indicate Q first reference signal resources selected by the terminal from the P first reference signal resources; Send eighth indication information, where the eighth indication information is used to indicate Q second reference signal resources, the Q first reference signal resources are associated with the Q second reference signal resources, and the Q second reference signal resources are used for a fourth collaborative transmission measurement; the Q is less than or equal to the P, and the Q and the P are positive integers.

8. The method according to claim 7, characterized in that Before sending the sixth indication information, the method further includes: A second message is received, where the second message is used to indicate updating of the cooperative transmission set.

9. A communication method, characterized in that: include: receiving first indication information, where the first indication information is used to indicate N first reference signal resources; the N first reference signal resources are used for first coordinated transmission measurement; Sending second indication information, where the second indication information is used to indicate the M first reference signal resources selected by the terminal from the N first reference signal resources; Receive third indication information, where the third indication information is used to indicate M second reference signal resources, where the M first reference signal resources are associated with the M second reference signal resources, and where the M second reference signal resources are used for second collaborative transmission measurement; where M is less than or equal to N, and M and N are positive integers.

10. The method according to claim 9, characterized in that The M first reference signal resources and the M second reference signal resources are associated with the same transmission reception point TRP set.

11. The method according to claim 9 or 10, characterized in that: The method further comprises: Fourth indication information is received, where the fourth indication information is used to instruct the terminal to select part or all of the first reference signal resources from the N first reference signal resources to perform channel measurement.

12. The method according to any one of claims 9 to 11, characterized in that: The method further comprises: Fifth indication information is received, where the fifth indication information is used to instruct the terminal to perform channel measurement based on the M second reference signal resources.

13. The method according to any one of claims 9 to 12, characterized in that: The value of M is determined based on the number of bits in the bitmap corresponding to the second indication information that take the first value.

14. The method according to any one of claims 9 to 13, characterized in that: In a preset time period, the N first reference signal resources are non-periodic resources and are activated only once; the M second reference signal resources are periodic or semi-persistent resources and are used to implement one or more coordinated transmission measurements.

15. The method according to any one of claims 9 to 14, characterized in that: The method further comprises: receiving sixth indication information, where the sixth indication information is used to indicate P first reference signal resources; the P first reference signal resources are used for third coordinated transmission measurement; Sending seventh indication information, where the seventh indication information is used to indicate the Q first reference signal resources selected by the terminal from the P first reference signal resources; Receive eighth indication information, where the eighth indication information is used to indicate Q second reference signal resources, where the Q first reference signal resources are associated with the Q second reference signal resources, and where the Q second reference signal resources are used for a fourth collaborative transmission measurement; where Q is less than or equal to P, and Q and P are positive integers.

16. The method according to claim 15, characterized in that Before receiving the sixth indication information, the method further includes: A second message is sent, where the second message is used to indicate updating of the cooperative transmission set.

17. A communication device, characterized in that: The method comprises a communication unit and a processing unit, wherein the communication unit and the processing unit are used to execute the method according to any one of claims 1 to 8 or claims 9 to 16.

18. A communication device, characterized in that: include: A processor, configured to enable the communication device to perform the method according to any one of claims 1 to 8 or claims 9 to 16 through logic circuits and / or execution instructions.

19. The device according to claim 18, characterized in that Also included is a memory for storing the instructions.

20. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 8 or claims 9 to 16.

21. A chip system, characterized in that: The chip system comprises a processor and an interface, wherein the processor is used to execute a computer program so that the chip system implements the method as claimed in any one of claims 1 to 8 or claims 9 to 16.

22. A computer program product, characterized in that The method comprises instructions which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 8 or claims 9 to 16.

23. A communication system, characterized in that: The communication system comprises an apparatus for executing the method according to any one of claims 1 to 8, and / or an apparatus for executing the method according to any one of claims 9 to 16.

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