A communication method and device

Abstract

The present application relates to the field of communication technology, and discloses a communication method and device, wherein the method includes: a terminal device operates on multiple downlink carriers, the multiple downlink carriers include a first downlink carrier and a second downlink carrier; the terminal device obtains first channel information, the first channel information includes second channel information, the first downlink carrier and the second downlink carrier share the second channel information; and, sends the first channel information to an access network device. In this way, the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information, so that the terminal device does not need to independently measure the channel information of the first downlink carrier and the second downlink carrier, which is convenient for reducing the processing burden of measuring the channel information, and the terminal device does not need to independently feedback the channel information of the first downlink carrier and the second downlink carrier, which is convenient for reducing the overhead of feedback channel information.

Description

Technical Field

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

[0002] In wireless communication systems, as the number of users of smart terminals continues to grow, user traffic and data throughput are also increasing, which in turn puts higher requirements on communication bandwidth and rate. To this end, carrier aggregation (CA) technology is introduced to support solutions with larger transmission bandwidth.

[0003] In a carrier aggregation scenario, a terminal device may operate on multiple downlink carriers. For each downlink carrier among the multiple downlink carriers, the terminal device may measure channel information of the downlink carrier and send the measured channel information to an access network device. Summary of the invention

[0004] The present application provides a communication method and apparatus, which facilitates reducing the processing burden of measuring channel information and the overhead of feeding back channel information by sharing part or all of channel information between different carriers.

[0005] In a first aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal device or a chip in a terminal device. Taking the application of the method to a terminal device as an example, the terminal device can operate on multiple downlink carriers, and the multiple downlink carriers include a first downlink carrier and a second downlink carrier; in the method, the terminal device obtains first channel information, the first channel information includes second channel information, and the first downlink carrier and the second downlink carrier share the second channel information; and sends the first channel information to an access network device.

[0006] In this way, the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information, so that the terminal device does not need to independently measure the channel information of the first downlink carrier and the second downlink carrier, which is convenient for reducing the processing burden of measuring the channel information, and the terminal device does not need to independently feedback the channel information of the first downlink carrier and the second downlink carrier, which is convenient for reducing the overhead of feedback channel information.

[0007] In one possible design, the first channel information also includes third channel information and fourth channel information; obtaining the first channel information includes: performing measurement based on a reference signal of the first downlink carrier to obtain the second channel information and the third channel information; and performing measurement based on a reference signal of the second downlink carrier to obtain the fourth channel information.

[0008] By adopting this method, since the terminal device can perform measurements based on the reference signal of the first downlink carrier to obtain the second channel information shared by the first downlink carrier and the second downlink carrier, compared with a method in which the terminal device independently measures all channel information on each downlink carrier, this can effectively reduce the processing burden of the terminal device in measuring channel information.

[0009] In one possible design, the first channel information also includes third channel information and fourth channel information; obtaining the first channel information includes: performing joint measurement based on a reference signal of the first downlink carrier and a reference signal of the second downlink carrier to obtain the second channel information; and performing measurement based on the reference signal of the first downlink carrier to obtain the third channel information; and performing measurement based on the reference signal of the second downlink carrier to obtain the fourth channel information.

[0010] In this way, since the terminal device can perform joint measurement based on the reference signal of the first downlink carrier and the reference signal of the second downlink carrier to obtain the second channel information shared by the first downlink carrier and the second downlink carrier, compared with the way in which the terminal device independently measures all channel information on each downlink carrier, it can effectively reduce the processing burden of the terminal device to measure the channel information. And through joint measurement, it is possible to obtain more accurate channel information based on a reference signal with a larger bandwidth.

[0011] In one possible design, sending the first channel information to an access network device includes: sending the second channel information and the third channel information of the first downlink carrier to the access network device, and sending the fourth channel information of the second downlink carrier to the access network device.

[0012] By adopting this method, since the terminal device can feed back part of the channel information for the second downlink carrier, the overhead of feeding back the channel information can be effectively saved.

[0013] In one possible design, the method further includes: determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0014] In one possible design, determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information includes: when the first downlink carrier and the second downlink carrier are located in the same frequency band combination, determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information; or when the difference between the center frequency point of the first downlink carrier and the center frequency point of the second downlink carrier is less than a first threshold, determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0015] In one possible design, determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information includes: receiving first indication information from the access network device, the first indication information being used to indicate that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0016] In this way, the access network device instructs the terminal device that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information, thereby increasing the flexibility of control of the access network device.

[0017] In one possible design, determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information includes: receiving configuration information from the access network device, the configuration information being used to configure a reference signal of the first downlink carrier and a reference signal of the second downlink carrier to have an associated relationship; and determining, based on the configuration information, that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0018] In a second aspect, an embodiment of the present application provides a communication method, which can be applied to an access network device or a chip in an access network device. Taking the application of the method to an access network device as an example, in the method, the access network device obtains first channel information, the first channel information includes second channel information, and the first downlink carrier and the second downlink carrier share the second channel information; and, sends downlink information to a terminal device on the first downlink carrier and / or the second downlink carrier.

[0019] In one possible design, the first channel information also includes third channel information and fourth channel information; obtaining the first channel information includes: receiving the second channel information and the third channel information of the first downlink carrier from the terminal device, and receiving the fourth channel information of the second downlink carrier from the terminal device.

[0020] In one possible design, the first channel information also includes third channel information and fourth channel information; obtaining the first channel information includes: performing joint measurement based on a reference signal of an uplink carrier corresponding to the first downlink carrier and a reference signal of an uplink carrier corresponding to the second downlink carrier to obtain the second channel information; or performing measurement based on a reference signal of an uplink carrier corresponding to the first downlink carrier to obtain the second channel information; receiving the third channel information of the first downlink carrier from the terminal device, and receiving the fourth channel information of the second downlink carrier from the terminal device.

[0021] In one possible design, the method further includes: sending first indication information to the terminal device, wherein the first indication information is used to indicate that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0022] In one possible design, the method further includes: sending configuration information to the terminal device, the configuration information being used to configure a reference signal of the first downlink carrier and a reference signal of the second downlink carrier to have an associated relationship.

[0023] It should be noted that the method described in the above-mentioned second aspect corresponds to the method described in the first aspect. The beneficial effects of the relevant technical features in the method described in the second aspect can be found in the description of the first aspect, and the details will not be repeated here.

[0024] In a third aspect, an embodiment of the present application provides a communication device, which may be a terminal device or a chip disposed inside the terminal device. The communication device has the function of implementing the first aspect, for example, the communication device includes a module or unit or means corresponding to the steps involved in the first aspect, and the function or unit or means may be implemented by software, or by hardware, or by hardware executing the corresponding software implementation.

[0025] In a possible design, the communication device includes a processing unit and a communication unit, wherein the communication unit can be used to send and receive signals to achieve communication between the communication device and other devices, for example, the communication unit is used to receive configuration information from a terminal device; the processing unit can be used to perform some internal operations of the communication device. The functions performed by the processing unit and the communication unit can correspond to the operations involved in the first aspect above.

[0026] In one possible design, the communication device includes a processor and may also include a transceiver, the transceiver is used to send and receive signals, and the processor executes program instructions to complete the method in any possible design or implementation of the first aspect above. The communication device may also include one or more memories, the memory is used to couple with the processor, and the memory can store the necessary computer programs or instructions for implementing the functions involved in the first aspect above. The processor can execute the computer program or instructions stored in the memory, and when the computer program or instructions are executed, the communication device implements the method in any possible design or implementation of the first aspect above.

[0027] In one possible design, the communication device includes a processor, which can be used to couple with a memory. The memory can store necessary computer programs or instructions for implementing the functions involved in the first aspect. The processor can execute the computer program or instructions stored in the memory, and when the computer program or instructions are executed, the communication device implements the method in any possible design or implementation of the first aspect.

[0028] In one possible design, the communication device includes a processor and an interface circuit, wherein the processor is used to communicate with other devices through the interface circuit and execute the method in any possible design or implementation of the first aspect above.

[0029] In a fourth aspect, an embodiment of the present application provides a communication device, which may be an access network device or a chip disposed inside the access network device. The communication device has the function of implementing the second aspect, for example, the communication device includes a module or unit or means corresponding to the operation involved in the second aspect, and the module or unit or means may be implemented by software, or by hardware, or may be implemented by hardware executing the corresponding software.

[0030] In a possible design, the communication device includes a processing unit and a communication unit, wherein the communication unit can be used to send and receive signals to achieve communication between the communication device and other devices, for example, the communication unit is used to receive configuration information from a terminal device; the processing unit can be used to perform some internal operations of the communication device. The functions performed by the processing unit and the communication unit can correspond to the operations involved in the second aspect above.

[0031] In one possible design, the communication device includes a processor, which can be used to couple with a memory. The memory can store necessary computer programs or instructions for implementing the functions involved in the second aspect. The processor can execute the computer program or instructions stored in the memory, and when the computer program or instructions are executed, the communication device implements the method in any possible design or implementation of the second aspect.

[0032] In one possible design, the communication device includes a processor, which can be used to couple with a memory. The memory can store necessary computer programs or instructions for implementing the functions involved in the second aspect. The processor can execute the computer program or instructions stored in the memory, and when the computer program or instructions are executed, the communication device implements the method in any possible design or implementation of the second aspect.

[0033] In one possible design, the communication device includes a processor and an interface circuit, wherein the processor is used to communicate with other devices through the interface circuit and execute the method in any possible design or implementation of the second aspect above.

[0034] It can be understood that in the third aspect or the fourth aspect above, the processor can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor, which is implemented by reading the software code stored in the memory. In addition, the above processors can be one or more, and the memories can be one or more. The memory can be integrated with the processor, or the memory can be separately set from the processor. In the specific implementation process, the memory can be integrated with the processor on the same chip, or can be set on different chips respectively. The embodiment of the present application does not limit the type of memory and the setting method of the memory and the processor.

[0035] In a fifth aspect, an embodiment of the present application provides a communication system, which includes the communication device described in the third aspect and the communication device described in the fourth aspect.

[0036] In a sixth aspect, the present application provides a computer-readable storage medium, in which computer-readable instructions are stored. When a computer reads and executes the computer-readable instructions, the computer executes a method in any possible design of the first aspect or the second aspect mentioned above.

[0037] In a seventh aspect, the present application provides a computer program product. When a computer reads and executes the computer program product, the computer executes the method in any possible design of the first aspect or the second aspect mentioned above.

[0038] In an eighth aspect, the present application provides a chip, comprising a processor, wherein the processor is coupled to a memory and is used to read and execute a software program stored in the memory to implement a method in any possible design of the first aspect or the second aspect above.

[0039] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of a network architecture applicable to an embodiment of the present application;

[0041] Figure 2 A schematic diagram of another network architecture applicable to the embodiments of the present application;

[0042] Figure 3A schematic diagram of another network architecture applicable to the embodiments of the present application;

[0043] Figure 4 A flow chart corresponding to the communication method provided in Example 1 of the present application;

[0044] Figure 5 A flow chart corresponding to the communication method provided in Embodiment 2 of the present application;

[0045] Figure 6 A possible exemplary block diagram of the device involved in the embodiments of the present application;

[0046] Figure 7 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0047] Figure 8 A schematic diagram of the structure of an access network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0049] First, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0050] (1) Terminal equipment: It can be a wireless terminal equipment that can receive access network equipment scheduling and instruction information. The wireless terminal equipment can be a device that provides voice and / or data connectivity to users, or a handheld device with wireless connection function, or other processing equipment connected to a wireless modem. The terminal equipment can communicate with one or more core networks or the Internet via a radio access network (RAN). The terminal equipment can be a mobile terminal equipment, such as a mobile phone (or "cellular" phone, mobile phone), a computer and a data card. For example, it can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges voice and / or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablet computers (Pads), computers with wireless transceiver functions, and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station (MS), a remote station (remotestation), an access point (AP), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent, a subscriber station (SS), a customer premises equipment (CPE), a terminal, a user equipment (UE), a mobile terminal (MT), etc. The terminal device may also be a wearable device and a next generation communication system, for example, a terminal device in a 5G communication system or a terminal device in a future evolved public land mobile network (PLMN), etc.

[0051] (2) Access network equipment: It can be equipment in a wireless network. For example, the access network equipment can be a radio access network (RAN) node (or equipment) that connects a terminal device to a wireless network, and can also be called a base station. At present, some examples of RAN equipment include: a new generation Node B (gNodeB) in a 5G communication system, 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 base station (e.g., home evolved Node B, or home Node B, HNB), a base band unit (BBU), or a wireless fidelity (Wi-Fi) access point (AP). In addition, in a network structure, the access network device may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node. In addition, in other possible cases, the access network device may be other devices that provide wireless communication functions for terminal devices. The embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device. For the convenience of description, in the embodiments of the present application, the device that provides wireless communication functions for terminal devices is called an access network device.

[0052] (3) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated with each other are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects.

[0053] Figure 1 Schematic diagram of a network architecture applicable to the embodiment of the present application. Figure 1 As shown, the terminal device can access the wireless network to obtain services of the external network (such as the Internet) through the wireless network, or communicate with other devices through the wireless network, such as communicating with other terminal devices. The wireless network includes a RAN and a core network (CN), wherein the RAN is used to access the terminal device (such as the terminal device 1301 or the terminal device 1302) to the wireless network, and the CN is used to manage the terminal device and provide a gateway for communicating with the external network.

[0054] The RAN may include one or more access network devices, such as access network device 1101 and access network device 1102 .

[0055] The CN may include one or more CN devices, such as CN device 120. Figure 1 When the network architecture shown is applicable to a 5G communication system, the CN device 120 may include an AMF entity, an SMF entity, a UPF entity, etc.

[0056] It should be understood that Figure 1 The number of devices in the communication system shown is for illustration only, and the embodiments of the present application are not limited thereto. In actual applications, the communication system may include more terminal devices, more access network devices, and other devices.

[0057] Figure 2 FIG. 1 is another schematic diagram of a network architecture applicable to the embodiment of the present application. Figure 2As shown, the network architecture includes CN equipment, access network equipment and terminal equipment. Among them, the access network equipment includes a baseband device and a radio frequency device, wherein the baseband device can be implemented by one node or by multiple nodes, and the radio frequency device can be implemented independently from the baseband device, or integrated in the baseband device, or some functions are integrated independently and some functions are integrated in the baseband device. For example, in an LTE communication system, the access network equipment includes a baseband device and a radio frequency device, wherein the radio frequency device can be arranged remotely relative to the baseband device, for example, a remote radio unit (RRU) is a remote wireless unit arranged relative to the BBU.

[0058] The communication between the access network equipment and the terminal equipment follows a certain protocol layer structure. For example, the control plane protocol layer structure may include the functions of the radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the media access control (MAC) layer and the physical layer; the user plane protocol layer structure may include the functions of the PDCP layer, the RLC layer, the MAC layer and the physical layer; in a possible implementation, a service data adaptation protocol (SDAP) layer may also be included above the PDCP layer.

[0059] The access network device may implement the functions of the protocol layers such as RRC, PDCP, RLC and MAC by one node, or may implement the functions of these protocol layers by multiple nodes. For example, in an evolutionary structure, the access network device may include a CU) and a DU, and multiple DUs may be centrally controlled by one CU. Figure 2 As shown, CU and DU can be divided according to the protocol layers of the wireless network, for example, the functions of the PDCP layer and above protocol layers are set in the CU, and the functions of the protocol layers below the PDCP, such as the RLC layer and the MAC layer, are set in the DU.

[0060] This division of the protocol layer is only an example. It can also be divided in other protocol layers, such as dividing in the RLC layer, setting the functions of the RLC layer and the protocol layers above in the CU, and the functions of the protocol layers below the RLC layer in the DU; or dividing in a certain protocol layer, for example, setting some functions of the RLC layer and the functions of the protocol layers above the RLC layer in the CU, and setting the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer in the DU. In addition, it can also be divided in other ways, such as dividing by latency, setting the functions whose processing time needs to meet the latency requirements in the DU, and the functions that do not need to meet the latency requirements in the CU.

[0061] In addition, the radio frequency device can be independently integrated and not placed in the DU, or it can be integrated in the DU, or partly remotely located and partly integrated in the DU, without any limitation here.

[0062] Figure 3 FIG. 1 is another schematic diagram of a network architecture applicable to an embodiment of the present application. Figure 2 The network architecture shown, Figure 3 The control plane (CP) and the user plane (UP) of the CU can also be separated and implemented by dividing them into different entities, namely, a control plane (CP) CU entity (i.e., a CU-CP entity) and a user plane (UP) CU entity (i.e., a CU-UP entity).

[0063] In the above network architecture, the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU. The DU can directly encapsulate the signaling through the protocol layer and transparently transmit it to the terminal device or CU without parsing it. In the following embodiments, if the transmission of such signaling between the DU and the terminal device is involved, at this time, the sending or receiving of the signaling by the DU includes this scenario. For example, the signaling of the RRC or PDCP layer will eventually be processed as the signaling of the PHY layer and sent to the terminal device, or it will be converted from the received signaling of the PHY layer. Under this architecture, the signaling of the RRC or PDCP layer can also be considered to be sent by the DU, or by the DU and the radio frequency device.

[0064] Above Figure 1 , Figure 2 or Figure 3The network architecture shown can be applicable to communication systems of various radio access technologies (RAT), for example, a 4G (or long term evolution (LTE)) communication system, a 5G (or new radio (NR)) communication system, or a transition system between an LTE communication system and a 5G communication system, which can also be called a 4.5G communication system, and of course, a future communication system. The network architecture and service scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present 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 in the embodiments of the present application are also applicable to similar technical problems.

[0065] The devices in the following embodiments of the present application may be located in a terminal device or an access network device according to the functions implemented. When the above CU-DU structure is adopted, the access network device may be a CU, or a DU, or a device including a CU and a DU.

[0066] The following first explains the relevant technical features involved in the embodiments of the present application. It should be noted that these explanations are intended to make the embodiments of the present application easier to understand and should not be regarded as limiting the scope of protection claimed by the present application.

[0067] 1. Carrier Aggregation

[0068] Carrier aggregation is a solution that aggregates two or more component carriers (CCs) to support a larger transmission bandwidth. In order to efficiently utilize fragmented spectrum, carrier aggregation supports aggregation between different component carriers, such as aggregation between adjacent or non-adjacent component carriers in the same frequency band, or aggregation between component carriers in different frequency bands. In the carrier aggregation solution, there are the concepts of primary cell and secondary cell.

[0069] The primary cell may be a cell where the terminal device performs initial connection establishment, or the primary cell may be a cell where the terminal device performs radio resource control (RRC) connection reconstruction, or the primary cell may be a primary cell designated during a handover, etc. The primary cell is mainly used for RRC communication with the terminal device. The carrier component corresponding to the primary cell is called the primary component carrier (PCC), the downlink carrier of the primary carrier component is called the downlink primary carrier component (DLPCC), and the uplink carrier of the primary carrier component is called the uplink primary carrier component (ULPCC).

[0070] The secondary cell is mainly used to provide additional wireless resources. For example, there is no RRC communication between the secondary cell and the terminal device. The secondary cell can be added during RRC reconfiguration. The carrier component corresponding to the secondary cell is called a secondary component carrier (SCC) (which can be referred to as a secondary carrier). The downlink carrier of the secondary carrier component is called a downlink secondary carrier component (down link SCC, DL SCC), and the uplink carrier of the secondary carrier component is called an uplink secondary carrier component (uplink SCC, UL SCC).

[0071] 2. Reference Signal

[0072] A reference signal (RS) may also be referred to as a pilot, a reference sequence, etc. In an embodiment of the present application, a reference signal may be a reference signal for channel measurement. For example, the reference signal may be a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a demodulation reference signal (DMRS), or a synchronous signal / physical broadcast channel block (SS / PBCH block, also referred to as SSB).

[0073] 3. Channel Information

[0074] In one possible implementation, the access network device can send a reference signal to the terminal device on the downlink carrier, and then the terminal device can measure according to the received reference signal, obtain the channel matrix, and feed back the channel information used to describe the channel matrix to the access network device. Accordingly, after receiving the channel information, the access network device can obtain the channel matrix according to the channel information, and then use the matching precoding matrix to process the signal to be sent on the downlink carrier, so that the precoded signal to be sent is adapted to the channel, thereby reducing the complexity of the terminal device to eliminate the influence between channels. Therefore, by precoding the signal to be sent, the quality of the received signal (such as signal to interference plus noise ratio (SINR)) can be improved.

[0075] The channel matrix is ​​an intermediate quantity proposed based on the continuity of the frequency domain for constructing the precoding matrix. The channel matrix can satisfy: H = SCF H . Wherein, H represents the channel matrix, S represents a matrix constructed by one or more (for example, K) angle vectors, for example, S = [a(θ1)a(θ2)…a(θ K )], F represents a matrix constructed by one or more (e.g., L) time delay vectors, such as F = [b(τ1)b(τ2)…b(τ L )], C represents a coefficient matrix composed of weighted coefficients corresponding to each angle vector in the K angle vectors and each delay vector in the L delay vectors.

[0076] Exemplarily, the angle vector can be understood as a precoding vector used to perform beamforming on the signal to be transmitted. Through beamforming, the transmitted signal can have a certain spatial directivity. Therefore, the process of precoding the signal to be transmitted based on the angle vector can also be regarded as a process of spatial domain (or spatial domain for short) precoding. The delay vector can be understood as a vector used to represent the law of change of the channel in the frequency domain. Precoding the signal to be transmitted based on the delay vector can essentially refer to phase rotation of each frequency domain unit in the frequency domain based on the elements in the delay vector, so as to pre-compensate the frequency selection characteristics caused by multipath delay through precoding technology. Therefore, the process of precoding the signal to be transmitted based on the delay vector can be regarded as a process of frequency domain precoding.

[0077] In the embodiment of the present application, the channel information of the downlink carrier may include angle channel information (such as S), delay channel information (such as F), and angle and delay weighting coefficient information (such as C).

[0078] Based on the above-mentioned related technical features, in the carrier aggregation scenario, the terminal device can work on multiple downlink carriers, such as downlink carrier 1 and downlink carrier 2. In this case, the terminal device can measure the channel information of downlink carrier 1 (such as S1, F1, C1) according to the reference signal of downlink carrier 1, and send the channel information of downlink carrier 1 to the access network device; and measure the channel information of downlink carrier 2 (such as S2, F2, C2) according to the reference signal of downlink carrier 2, and send the channel information of downlink carrier 2 to the access network device. In this way, the terminal device independently measures the channel information on each downlink carrier, resulting in a heavy processing burden on the terminal device; in addition, the terminal device feeds back the channel information of each downlink carrier to the access network device, resulting in a heavy overhead of feedback channel information.

[0079] Based on this, an embodiment of the present application provides a communication method, which facilitates reducing the processing burden of measuring channel information and the overhead of feedback channel information by sharing part or all of the channel information between different carriers.

[0080] Exemplarily, sharing part or all of the channel information between different carriers may refer to sharing part or all of the channel information between different downlink carriers. Sharing part or all of the channel information between different downlink carriers may refer to sharing part or all of the channel information between two downlink carriers, or may refer to sharing part or all of the channel information between more than two downlink carriers. In the embodiment of the present application, sharing part or all of the channel information between two downlink carriers will be described as an example.

[0081] The sharing of part of the channel information between two downlink carriers may refer to the sharing of angle channel information, delay channel information, and weighted coefficient information of angle and delay between two downlink carriers. The sharing of part of the channel information between two downlink carriers may refer to the sharing of part of the angle channel information, delay channel information, and weighted coefficient information of angle and delay between two downlink carriers. For example, two downlink carriers can share angle channel information, but do not share delay channel information, angle and delay weighting coefficient information; for another example, two downlink carriers can share angle channel information and delay channel information, but do not share angle and delay weighting coefficient information; for another example, the angle channel information may include two or more sub-parts (for example, three sub-parts, namely S1, S2, and S3), then the two downlink carriers can share S1 in the angle channel information, but do not share S2 and S3 in the angle channel information, and do not share delay channel information, angle and delay weighting coefficient information; for another example, the delay channel information may include two or more sub-parts (for example, three sub-parts, namely F1, F2, and F3), then the two downlink carriers can share S1 in the angle channel information and F1 in the delay channel information, but do not share S2 and S3 in the angle channel information, F2 and F3 in the delay channel information, and do not share angle and delay weighting coefficient information.

[0082] It should be noted that sharing part or all of the channel information between different downlink carriers can also be understood as multi-frequency coordination between different downlink carriers, that is, using the similar characteristics of some channels between different downlink carriers to enable the association between reference signals on different downlink carriers.

[0083] The communication method provided in the embodiments of the present application is described in detail below in combination with Embodiment 1 and Embodiment 2.

[0084] In the following introduction, this method is applied to Figure 1 Take the system architecture shown as an example. In addition, the method can be executed by two communication devices, such as a first communication device and a second communication device, wherein the first communication device can be an access network device or a communication device that can support the access network device to implement the functions required by the method, and of course it can also be other communication devices, such as a chip or a chip system. The second communication device can be a terminal device or a communication device that can support the terminal device to implement the functions required by the method, and of course it can also be other communication devices, such as a chip or a chip system. For ease of introduction, in the following, the method is executed by an access network device and a terminal device as an example, that is, the first communication device is an access network device and the second communication device is a terminal device as an example. If this embodiment is applied to Figure 1 The system architecture shown below is used to perform Figure 4 or Figure 5The access network device of the embodiment shown may be Figure 1 The access network device 1101 in the system architecture shown in the figure is used to perform the following Figure 4 or Figure 5 The terminal device of the embodiment shown may be Figure 1 Terminal device 1301 in the system architecture shown.

[0085] Embodiment 1

[0086] Figure 4 This is a flow chart corresponding to the communication method provided in Example 1 of this application. Figure 4 As shown, including:

[0087] S400: The terminal device determines that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0088] Exemplarily, the terminal device can communicate with the access network device in a carrier aggregation manner. For example, after the terminal device establishes a connection with the access network device in the primary cell, the access network device can configure and activate one or more secondary cells for the terminal device. In this case, the terminal device can operate on multiple downlink carriers. In one example, the multiple downlink carriers may include a first downlink carrier and a second downlink carrier, wherein the first downlink carrier and the second downlink carrier may be downlink carriers corresponding to different secondary cells; or, the first downlink carrier is a downlink carrier corresponding to the primary cell, and the second downlink carrier is a downlink carrier corresponding to the secondary cell; or, the first downlink carrier is a downlink carrier corresponding to the secondary cell, and the second downlink carrier is a downlink carrier corresponding to the primary cell.

[0089] There may be multiple implementations for the terminal device to determine that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information. Several possible implementations are described below, such as implementations a1 to a4.

[0090] (1) Implementation method a1

[0091] When the first downlink carrier and the second downlink carrier are located in the same frequency band combination (such as the first frequency band combination), the terminal device can determine that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information. For example, the access network device can pre-configure one or more frequency band combinations for the terminal device, or one or more frequency band combinations can be pre-defined by the protocol, and multiple downlink carriers located in the same frequency band combination support sharing of part or all of the channel information.

[0092] Exemplarily, the frequency band combination may include at least one frequency band, and any two frequency bands in the at least one frequency band may overlap or not overlap at all. The frequency band involved in the embodiment of the present application may also be referred to as a frequency band, which may refer to a section of frequency, or a frequency range. In the embodiment of the present application, the first downlink carrier and the second downlink carrier may both be located on a certain frequency band included in the first frequency band combination, or the first downlink carrier and the second downlink carrier may also be located on different frequency bands included in the first frequency band combination, respectively, without specific limitation.

[0093] (2) Implementation method a2

[0094] When the difference between the center frequency of the first downlink carrier and the center frequency of the second downlink carrier is less than the first threshold, the terminal device can determine that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information. The first threshold may be pre-configured for the terminal device by the access network device, or may be pre-defined by the protocol. Exemplarily, the size of the first threshold may vary depending on the frequency bands where the first downlink carrier and the second downlink carrier are located.

[0095] (3) Implementation method a3

[0096] The access network device may send first indication information to the terminal device, and the first indication information is used to indicate that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information, and then after the terminal device receives the first indication information, it may determine that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information according to the first indication information. Among them, there may be multiple ways for the access network device to send the first indication information to the terminal device, such as sending the first indication information to the terminal device through an RRC message, a MAC layer control signaling, or a physical layer control signaling, wherein the MAC layer control signaling may be a MAC control element (CE), and the physical layer control signaling may be downlink control information (DCI).

[0097] There may be multiple ways for the first indication information to indicate that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information. For example, the first indication information may include the identifier of the cell corresponding to the first downlink carrier (such as cell 1) and the identifier of the cell corresponding to the second downlink carrier (such as cell 2). For another example, the first indication information may include one or more cell groups, and the downlink carrier corresponding to the cells in each cell group supports sharing of part or all of the channel information; for example, the first indication information includes cell group 1 and cell group 2, wherein cell group 1 includes the identifier of cell 1 and the identifier of cell 2, and cell group 2 includes the identifier of cell 3 and the identifier of cell 4, and then after the terminal device receives the first indication information, it can determine that the downlink carrier corresponding to cell 1 (i.e., the first downlink carrier) and the downlink carrier corresponding to cell 2 (i.e., the second downlink carrier) support sharing of part or all of the channel information according to the first indication information; and determine that the downlink carrier corresponding to cell 3 and the downlink carrier corresponding to cell 4 support sharing of part or all of the channel information.

[0098] For implementation mode a3, in an example, the terminal device can determine that at least two downlink carriers among multiple downlink carriers can share part or all of the channel information according to the capability information of the terminal device, and then send the second indication information to the access network device, and the second indication information is used to indicate that at least two downlink carriers can share part or all of the channel information. Among them, the at least two downlink carriers may include a first downlink carrier and a second downlink carrier, and optionally, may also include other possible downlink carriers, such as a third downlink carrier. There are many ways for the second indication information to indicate that at least two downlink carriers can share part or all of the channel information, such as the second indication information may include the identifier of the cell corresponding to the at least two downlink carriers. Accordingly, after receiving the second indication information, the access network device may determine the first indication information according to the second indication information, and send the first indication information to the terminal device. For example, the second indication information indicates that the first downlink carrier, the second downlink carrier and the third downlink carrier can share part or all of the channel information. In this case, the access network device can determine that some or all of the downlink carriers in the first downlink carrier, the second downlink carrier and the third downlink carrier support sharing part or all of the channel information according to the second indication information, such as determining that the first downlink carrier and the second downlink carrier support sharing part or all of the channel information.

[0099] Exemplarily, there may be multiple ways for a terminal device to determine, based on the capability information of the terminal device, that at least two downlink carriers among multiple downlink carriers can share part or all of the channel information. For example, the capability information of the terminal device may include the receiving capability of a receiving channel of the terminal device. If the terminal device determines that the same receiving channel can be used to receive signals on at least two downlink carriers among multiple downlink carriers, it can be determined that at least two downlink carriers can share part or all of the channel information. For another example, the capability information of the terminal device may include the receiving capability of the antenna of the terminal device. If the terminal device determines that the same antenna can be used to receive signals on at least two downlink carriers among multiple downlink carriers, it can be determined that at least two downlink carriers can share part or all of the channel information.

[0100] (4) Implementation method a4

[0101] The access network device may send configuration information to the terminal device, and the configuration information is used to configure that the reference signal of the first downlink carrier and the reference signal of the second downlink carrier have an associated relationship; and then after the terminal device receives the configuration information, it may determine that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information according to the configuration information. Exemplarily, the reference signal of the first downlink carrier and the reference signal of the second downlink carrier have an associated relationship, which may refer to a quasi-co-location (QCL) relationship between the reference signal of the first downlink carrier and the reference signal of the second downlink carrier. For example, the access network device may configure the DMRS of the first downlink carrier and the DMRS of the second downlink carrier to be in a quasi-co-location relationship, in which case the terminal device may use the same spatial division reception parameters to receive the DMRS of the first downlink carrier and the DMRS of the second downlink carrier; or, the CSI-RS of the first downlink carrier and the CSI-RS of the second downlink carrier may be configured to be in a quasi-co-location relationship, in which case the terminal device may use the same spatial division reception parameters to receive the CSI-RS of the first downlink carrier and the CSI-RS of the second downlink carrier.

[0102] Exemplarily, there may be multiple ways for the access network device to configure the reference signal of the first downlink carrier and the reference signal of the second downlink carrier to have an associated relationship through configuration information. For example, the access network device may add the identifier and reference signal type (such as DMRS or CSI-RS) of cell 2 to the configuration information of cell 1; Exemplarily, the configuration information may be effective until the access network device reconfigures through an RRC message, or the access network device may also indicate whether the configuration information is effective through MAC CE or DCI. For another example, the access network device may configure a cell group for a certain type of reference signal, and the reference signals of the downlink carriers corresponding to the cells in the cell group have an associated relationship. In this case, the configuration information may include the reference signal type (such as DMRS or CSI-RS) and the cell group.

[0103] S401, a terminal device obtains first channel information, where the first channel information may include second channel information, and the first downlink carrier and the second downlink carrier share the second channel information.

[0104] S402: The terminal device sends first channel information to the access network device.

[0105] S403: The access network device receives the first channel information, and may determine the channel information of the first downlink carrier and the channel information of the second downlink carrier according to the first channel information.

[0106] In the embodiment of the present application, the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information. The above S401 to S403 are described in detail below in combination with two situations.

[0107] Scenario 1

[0108] In scenario one, the second channel information may include angle channel information, delay channel information, and angle and delay weighted coefficient information. It can be understood that the first downlink carrier and the second downlink carrier share all channel information. In this case, the first channel information may no longer include other channel information except the second channel information, that is, the first channel information and the second channel information are the same. In this case, there may be multiple implementation methods for the terminal device to obtain the first channel information (i.e., the second channel information). Two possible implementation methods are described below, namely, implementation method b1 and implementation method b2.

[0109] (1) Implementation method b1

[0110] The terminal device may select a downlink carrier from the first downlink carrier and the second downlink carrier. For example, if the selected downlink carrier is the first downlink carrier, the terminal device may measure according to the reference signal of the first downlink carrier to obtain the second channel information. There are multiple ways for the terminal device to select a downlink carrier from the first downlink carrier and the second downlink carrier. For example, the terminal device may select according to at least one of the bandwidth of the first downlink carrier and the second downlink carrier, the frequency of the first downlink carrier and the second downlink carrier, and the number of antennas used by the access network device to send signals on the first downlink carrier and the second downlink carrier. For example, the terminal device may select a downlink carrier with a larger bandwidth from the first downlink carrier and the second downlink carrier according to the bandwidth of the first downlink carrier and the second downlink carrier; for another example, the terminal device may select a downlink carrier with a lower frequency from the first downlink carrier and the second downlink carrier according to the frequency of the first downlink carrier and the second downlink carrier, for example, the terminal device may select a downlink carrier with a lower center frequency from the first downlink carrier and the second downlink carrier according to the center frequency of the first downlink carrier and the second downlink carrier; or, the terminal device may select a downlink carrier with a larger coverage from the first downlink carrier and the second downlink carrier according to the coverage of the first downlink carrier and the second downlink carrier (usually, the coverage of a low-frequency downlink carrier is greater than the coverage of a high-frequency downlink carrier). For another example, the terminal device may select a downlink carrier with a larger number of antennas according to the number of antennas used by the access network device to send signals on the first downlink carrier and the second downlink carrier.

[0111] By adopting the above implementation method, since the terminal device can perform measurements based on the reference signal of the first downlink carrier to obtain the second channel information shared by the first downlink carrier and the second downlink carrier, there is no need to perform measurements based on the reference signal of the second downlink carrier, thereby effectively reducing the processing burden of the terminal device in measuring channel information.

[0112] (2) Implementation method b2

[0113] The terminal device may perform a joint measurement based on the reference signal of the first downlink carrier and the reference signal of the second downlink carrier to obtain the second channel information. Here, the reference signal of the first downlink carrier and the reference signal of the second downlink carrier may be reference signals of the same type, or may be reference signals of different types. For example, the terminal device may perform a joint measurement based on the DMRS of the first downlink carrier and the DMRS of the second downlink carrier to obtain the second channel information; for another example, the terminal device may also perform a joint measurement based on the DMRS of the first downlink carrier and the SRS of the second downlink carrier to obtain the second channel information.

[0114] With the above implementation, since the terminal device can perform joint measurement based on the reference signal of the first downlink carrier and the reference signal of the second downlink carrier to obtain the second channel information shared by the first downlink carrier and the second downlink carrier, there is no need to measure the channel information for the first downlink carrier and the second downlink carrier respectively, thereby effectively reducing the processing burden of the terminal device for measuring the channel information. And through joint measurement, it is possible to obtain more accurate channel information based on a reference signal with a larger bandwidth.

[0115] Exemplarily, in scenario one, after the terminal device determines the second channel information using the above-mentioned implementation b1 or implementation b2, it can send the second channel information to the access network device for the first downlink carrier (i.e., send the second channel information of the first downlink carrier to the access network device), and does not feed back channel information for the second downlink carrier. Accordingly, after the access network device receives the second channel information fed back by the terminal device for the first downlink carrier, it can determine that the second downlink carrier shares the second channel information with the first downlink carrier, that is, it can be determined that the channel information of the first downlink carrier includes the second channel information, and the channel information of the second downlink carrier also includes the second channel information, and the channel information of the two is the same. In this way, since the terminal device does not feed back channel information for the second downlink carrier, the overhead of feeding back channel information can be effectively saved.

[0116] Scenario 2

[0117] In scenario 2, the second channel information may include partial information of angle channel information, delay channel information, and weighted coefficient information of angle and delay, for example, the second channel information includes angle channel information and delay channel information, but does not include weighted coefficient information of angle and delay. It can be understood that the first downlink carrier and the second downlink carrier share part of the channel information. In this case, in addition to the second channel information, the first channel information may also include other channel information, such as third channel information and fourth channel information. For example, the second channel information includes angle channel information (such as S), delay channel information (such as F), the third channel information includes weighted coefficient information 1 of angle and delay (such as C1), and the fourth channel information includes weighted coefficient information 2 of angle and delay (such as C2). In this case, there may be multiple implementation methods for the terminal device to obtain the first channel information (such as the second channel information, the third channel information and the fourth channel information). Two possible implementation methods are described below, namely implementation method c1 and implementation method c2.

[0118] (1) Implementation method c1

[0119] The terminal device can select a downlink carrier from the first downlink carrier and the second downlink carrier. For example, if the selected downlink carrier is the first downlink carrier, the terminal device can measure according to the reference signal of the first downlink carrier to obtain the second channel information (such as S, F) and the third channel information (such as C1); and the terminal device can measure according to the reference signal of the second downlink carrier to obtain the fourth channel information (such as C2). Compared with the method in which the terminal device independently measures all channel information on each downlink carrier, the processing burden of the terminal device measuring channel information can be effectively reduced.

[0120] Among them, the way in which the terminal device selects a downlink carrier from the first downlink carrier and the second downlink carrier can be referred to the description in implementation method b1, and will not be repeated here.

[0121] (2) Implementation method c2

[0122] The terminal device can perform joint measurement based on the reference signal of the first downlink carrier and the reference signal of the second downlink carrier to obtain the second channel information (such as S, F). Also, the terminal device can perform measurement based on the reference signal of the first downlink carrier to obtain the third channel information (such as C1); the terminal device can perform measurement based on the reference signal of the second downlink carrier to obtain the fourth channel information (such as C2). Compared with the method in which the terminal device independently measures all channel information on each downlink carrier, the processing burden of the terminal device measuring channel information can be effectively reduced.

[0123] Exemplarily, in scenario 2, the terminal device determines the first channel information by using the above-mentioned implementation method c1 or implementation method c2, and can send the second channel information and the third channel information to the access network device for the first downlink carrier (i.e., send the second channel information and the third channel information of the first downlink carrier to the access network device), and send the fourth channel information to the access network device for the second downlink carrier (i.e., send the fourth channel information of the second downlink carrier to the access network device). Accordingly, after the access network device receives the channel information fed back by the terminal device for the first downlink carrier and the second downlink carrier, it can be determined that the second downlink carrier shares the second channel information with the first downlink carrier, that is, it can be determined that the channel information of the first downlink carrier includes the second channel information and the third channel information, and the channel information of the second downlink carrier includes the second channel information and the fourth channel information. In this way, since the terminal device can feed back part of the channel information for the second downlink carrier, the overhead of feedback channel information can be effectively saved.

[0124] In addition, considering that the terminal device can feed back part of the channel information (i.e., the fourth channel information) for the second downlink carrier, therefore, in a possible example, the accuracy of the fourth channel information can be higher than the accuracy of the third channel information, that is, the accuracy of the weighted coefficient information of the angle and delay of the second downlink carrier can be higher than the accuracy of the weighted coefficient information of the angle and delay of the first downlink carrier, wherein the accuracy of the weighted coefficient information of the angle and delay can refer to the accuracy of the weighted coefficient of the angle and delay, such as increasing the number of bits occupied by the weighted coefficient of the angle and delay of the second downlink carrier, thereby increasing the accuracy of the weighted coefficient information of the angle and delay of the second downlink carrier. For example, if the number of bits occupied by the weighted coefficient of the angle and delay of the first downlink carrier is 3, the number of bits occupied by the weighted coefficient of the angle and delay of the second downlink carrier can be increased to 4. In this way, the accuracy of the weighted quantization of the channel coefficient can be effectively improved.

[0125] As a possible implementation, the access network device may send a third indication information to the terminal device, and the third indication information is used to indicate the channel information feedback type of the first downlink carrier and / or the channel information feedback type of the second downlink carrier. The channel information feedback type may include a first type, a second type, and a second type. If the third indication information indicates that the channel information feedback type of the first downlink carrier is the first type, and the channel feedback type of the second downlink carrier is the second type, the terminal device may send the second channel information and the third channel information to the access network device for the first downlink carrier, and send the fourth channel information to the access network device for the second downlink carrier (the accuracy of the fourth channel information is the same as the accuracy of the third channel information). If the third indication information indicates that the channel information feedback type of the first downlink carrier is the first type, and the channel feedback type of the second downlink carrier is the third type, the terminal device may send the second channel information and the third channel information to the access network device for the first downlink carrier, and send the fourth channel information to the access network device for the second downlink carrier (the accuracy of the fourth channel information is higher than the accuracy of the third channel information).

[0126] As another possible implementation, the terminal device may select a downlink carrier from the first downlink carrier and the second downlink carrier, the channel information feedback type of the selected downlink carrier is the first type, and the channel information feedback type of the unselected downlink carrier is the second type or the third type. There may be multiple ways for the terminal device to select a downlink carrier from the first downlink carrier and the second downlink carrier, for example, refer to the description in implementation b1, which will not be repeated here.

[0127] S404: The access network device sends downlink information to the terminal device via the first downlink carrier and / or the second downlink carrier.

[0128] Here, after the access network device determines the channel information of the first downlink carrier and the channel information of the second downlink carrier, it can obtain the channel matrix according to the channel information of the first downlink carrier, and then use the matching precoding matrix to process the signal to be sent on the first downlink carrier, and then send the downlink information to the terminal device on the first downlink carrier; and / or, it can obtain the channel matrix according to the channel information of the second downlink carrier, and then use the matching precoding matrix to process the signal to be sent on the second downlink carrier, and then send the downlink information to the terminal device on the second downlink carrier.

[0129] By adopting the method in the above embodiment, the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information, so that the terminal device does not need to independently measure the channel information of the first downlink carrier and the second downlink carrier, which is convenient for reducing the processing burden of measuring the channel information, and the terminal device does not need to independently feedback the channel information of the first downlink carrier and the second downlink carrier, which is convenient for reducing the overhead of feedback channel information.

[0130] Embodiment 2

[0131] Figure 5 This is a flow chart corresponding to the communication method provided in Example 2 of this application. Figure 5 As shown, including:

[0132] S501: An access network device obtains first channel information, where the first channel information includes second channel information, and the first downlink carrier and the second downlink carrier share the second channel information.

[0133] Here, the terminal device may communicate with the access network device in a carrier aggregation manner, in which case the terminal device may operate on multiple downlink carriers. In one example, the multiple downlink carriers may include a first downlink carrier and a second downlink carrier.

[0134] Exemplarily, the second channel information may include partial information of angle channel information, delay channel information, and weighted coefficient information of angle and delay, for example, the second channel information includes angle channel information and delay channel information, but does not include weighted coefficient information of angle and delay. It can be understood that the first downlink carrier and the second downlink carrier share part of the channel information. In this case, in addition to the second channel information, the first channel information may also include other channel information, such as third channel information and fourth channel information. For example, the second channel information includes angle channel information (such as S), delay channel information (such as F), the third channel information includes weighted coefficient information 1 (such as C1) of angle and delay, and the fourth channel information includes weighted coefficient information 2 (such as C2) of angle and delay.

[0135] There may be multiple implementations for the access network device to obtain the first channel information (such as the second channel information, the third channel information and the fourth channel information). Two possible implementations are described below, namely implementation d1 and implementation d2.

[0136] (1) Implementation method d1

[0137] The access network device performs joint measurement based on the reference signal of the uplink carrier (referred to as the first uplink carrier) corresponding to the first downlink carrier and the reference signal of the uplink carrier (referred to as the second uplink carrier) corresponding to the second downlink carrier to obtain the second channel information. Here, the reference signal of the first uplink carrier and the reference signal of the second uplink carrier can be reference signals of the same type, or can also be reference signals of different types. For example, the access network device performs joint measurement based on the SRS of the first uplink carrier and the SRS of the second uplink carrier to obtain the second channel information. And, after determining that the first downlink carrier and the second downlink carrier support part of the channel information, the terminal device can measure according to the reference signal of the first downlink carrier to obtain the third channel information, and feedback the third channel information for the first downlink carrier, so that the access network device can receive the third channel information of the first downlink carrier; the terminal device can measure according to the reference signal of the second downlink carrier to obtain the fourth channel information, and feedback the fourth channel information for the second downlink carrier, so that the access network device can receive the fourth channel information of the second downlink carrier.

[0138] Further, the access network device may determine that the channel information of the first downlink carrier includes the second channel information and the third channel information, and the channel information of the second downlink carrier includes the second channel information and the fourth channel information.

[0139] In addition, in this implementation, the first downlink carrier and the second downlink carrier may be downlink carriers corresponding to different secondary cells; or, the first downlink carrier is the downlink carrier corresponding to the primary cell, and the second downlink carrier is the downlink carrier corresponding to the secondary cell; or, the first downlink carrier is the downlink carrier corresponding to the secondary cell, and the second downlink carrier is the downlink carrier corresponding to the primary cell.

[0140] (2) Implementation method d2

[0141] The access network device performs measurement according to the reference signal of the uplink carrier corresponding to the first downlink carrier to obtain the second channel information. Also, after determining that the first downlink carrier and the second downlink carrier support part of the channel information, the terminal device can perform measurement according to the reference signal of the first downlink carrier to obtain the third channel information, and feedback the third channel information for the first downlink carrier, so that the access network device can receive the third channel information of the first downlink carrier; the terminal device can perform measurement according to the reference signal of the second downlink carrier to obtain the fourth channel information, and feedback the fourth channel information for the second downlink carrier, so that the access network device can receive the fourth channel information of the second downlink carrier. Further, the access network device can determine that the channel information of the first downlink carrier includes the second channel information and the third channel information, and the channel information of the second downlink carrier includes the second channel information and the fourth channel information.

[0142] Exemplarily, in this implementation, the first downlink carrier may be a downlink carrier corresponding to a primary cell, and the second downlink carrier may be a downlink carrier corresponding to a secondary cell. For example, if the terminal device does not support uplink carrier aggregation, the terminal device may send an SRS on an uplink carrier corresponding to the primary cell, but not send an SRS on an uplink carrier corresponding to the secondary cell. In this case, the access network device may measure the SRS of the uplink carrier corresponding to the first downlink carrier to obtain the second channel information.

[0143] For example, the access network device configures and activates cell 1 of 1.8 GHz and cell 2 of 2.1 GHz for the terminal device. Cell 1 has only downlink carrier 1, and cell 2 contains downlink carrier 2 and uplink carrier 2. The access network device can determine the second channel information (such as S and F) shared by downlink carrier 1 and downlink carrier 2 according to the SRS sent on uplink carrier 2 in cell 2; the terminal device can determine the third channel information (such as C1) of downlink carrier 1 according to the CSI-RS on downlink carrier 1, and send it to the access network device, and determine the fourth channel information (such as C2) of downlink carrier 2 according to the CSI-RS on downlink carrier 2, and send it to the access network device; and then the access network device can determine that the channel information of downlink carrier 1 includes S, F, and C1, and the channel information of downlink carrier 1 includes S, F, and C2.

[0144] It should be noted that, in other possible situations, the second channel information may include angle channel information, delay channel information, and angle and delay weighted coefficient information, which can be understood as the first downlink carrier and the second downlink carrier sharing all channel information. In this case, the first channel information may no longer include other channel information except the second channel information. Furthermore, the access network device may determine the second channel information (i.e., the first channel information) by referring to the above implementation method d1 or implementation method d2, and the terminal device may not need to measure and report the channel information.

[0145] S502: The access network device sends downlink information to the terminal device on the first downlink carrier and / or the second downlink carrier.

[0146] Here, S502 may refer to the description of S404 in the first embodiment.

[0147] By adopting the method in the above embodiment, since the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information, the access network device can determine part of the channel information of the first downlink carrier and the second downlink carrier according to the reference signal of the uplink carrier corresponding to the first downlink carrier and / or the second downlink carrier, thereby reducing the processing burden of the terminal device in measuring the channel information and the overhead of feedback channel information.

[0148] Regarding the above-mentioned Embodiment 1 and Embodiment 2, it should be noted that:

[0149] (1) The operation numbers of each flowchart described in the above embodiment are only examples of the execution process and do not constitute a limitation on the order of execution of the operations. In the embodiments of the present application, there is no strict execution order between the operations that have no timing dependency relationship with each other. In addition, not all the operations shown in each flowchart are operations that must be executed, and some operations can be added or deleted based on each flowchart according to actual needs.

[0150] (2) The above description focuses on the differences between the first embodiment and the second embodiment. Except for the differences, the first embodiment and the second embodiment can refer to each other.

[0151] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the interaction between the access network device and the terminal device. It is understandable that in order to achieve the above functions, the access network device or the terminal device may include a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0152] The embodiment of the present application can divide the terminal device and the access network device into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or software functional unit.

[0153] In the case of an integrated unit, Figure 6 A possible exemplary block diagram of the device involved in the embodiments of the present application is shown. Figure 6 As shown, the apparatus 600 may include: a processing unit 602 and a communication unit 603. The processing unit 602 is used to control and manage the actions of the apparatus 600. The communication unit 603 is used to support the communication between the apparatus 600 and other devices. Optionally, the communication unit 603 is also called a transceiver unit, and may include a receiving unit and / or a sending unit, which are respectively used to perform receiving and sending operations. The apparatus 600 may also include a storage unit 601, which is used to store program codes and / or data of the apparatus 600.

[0154] The apparatus 600 may be a terminal device in the above embodiment, or may be a chip set in the terminal device. The processing unit 602 may support the apparatus 600 to execute the actions of the terminal device in the above method examples. Alternatively, the processing unit 602 mainly executes the internal actions of the terminal device in the method examples, and the communication unit 603 may support the communication between the apparatus 600 and other devices.

[0155] Specifically, in one embodiment, the device 600 can operate on multiple downlink carriers, the multiple downlink carriers include a first downlink carrier and a second downlink carrier; the processing unit 602 is used to: obtain first channel information, the first channel information includes second channel information, the first downlink carrier and the second downlink carrier share the second channel information; and the communication unit 603 is used to: send the first channel information to the access network device.

[0156] In one possible design, the first channel information also includes third channel information and fourth channel information; the processing unit 602 is specifically used to: perform measurement according to the reference signal of the first downlink carrier to obtain the second channel information and the third channel information; and perform measurement according to the reference signal of the second downlink carrier to obtain the fourth channel information.

[0157] In one possible design, the first channel information also includes third channel information and fourth channel information; the processing unit 602 is specifically used to: perform joint measurement based on a reference signal of the first downlink carrier and a reference signal of the second downlink carrier to obtain the second channel information; and perform measurement based on the reference signal of the first downlink carrier to obtain the third channel information; perform measurement based on the reference signal of the second downlink carrier to obtain the fourth channel information.

[0158] In one possible design, the communication unit 603 is used to: send the second channel information and the third channel information of the first downlink carrier to the access network device, and send the fourth channel information of the second downlink carrier to the access network device.

[0159] In a possible design, the processing unit 602 is further used to: determine that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0160] In one possible design, the processing unit 602 is specifically used to: when the first downlink carrier and the second downlink carrier are located in the same frequency band combination, determine that the first downlink carrier and the second downlink carrier support sharing part or all of the channel information; or, when the difference between the center frequency point of the first downlink carrier and the center frequency point of the second downlink carrier is less than a first threshold, determine that the first downlink carrier and the second downlink carrier support sharing part or all of the channel information.

[0161] In one possible design, the communication unit 603 is further used to: receive first indication information from the access network device, where the first indication information is used to indicate that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0162] In one possible design, the communication unit 603 is also used to: receive configuration information from the access network device, the configuration information being used to configure a reference signal of the first downlink carrier and a reference signal of the second downlink carrier to have an associated relationship; the processing unit 602 is specifically used to: determine, based on the configuration information, that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0163] The device 600 may be the access network device in the above embodiment, or may be a chip set in the access network device. The processing unit 602 may support the device 600 to perform the actions of the access network device in the above method examples. Alternatively, the processing unit 602 mainly performs the internal actions of the access network device in the method examples, and the communication unit 603 may support the communication between the device 600 and other devices.

[0164] Specifically, in one embodiment, the processing unit 602 is used to: obtain first channel information, the first channel information includes second channel information, and the first downlink carrier and the second downlink carrier share the second channel information; and the communication unit 603 is used to: send downlink information to the terminal device on the first downlink carrier and / or the second downlink carrier.

[0165] In one possible design, the first channel information also includes third channel information and fourth channel information; the communication unit 603 is also used to: receive the second channel information and the third channel information of the first downlink carrier from the terminal device, and receive the fourth channel information of the second downlink carrier from the terminal device.

[0166] In one possible design, the first channel information also includes third channel information and fourth channel information; the processing unit 602 is specifically used to: perform joint measurement based on a reference signal of an uplink carrier corresponding to the first downlink carrier and a reference signal of an uplink carrier corresponding to the second downlink carrier to obtain the second channel information; or, perform measurement based on a reference signal of an uplink carrier corresponding to the first downlink carrier to obtain the second channel information; the communication unit 603 is also used to: receive the third channel information of the first downlink carrier from the terminal device, and receive the fourth channel information of the second downlink carrier from the terminal device.

[0167] In one possible design, the communication unit 603 is further used to: send first indication information to the terminal device, where the first indication information is used to indicate that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

[0168] In a possible design, the communication unit 603 is further used to: send configuration information to the terminal device, where the configuration information is used to configure a reference signal of the first downlink carrier and a reference signal of the second downlink carrier to have an associated relationship.

[0169] It should be understood that the division of the units in the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And the units in the device can all be implemented in the form of software calling through processing elements; they can also be all implemented in the form of hardware; some units can also be implemented in the form of software calling through processing elements, and some units can be implemented in the form of hardware. For example, each unit can be a separately established processing element, or it can be integrated in a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, and called and executed by a certain processing element of the device. The function of the unit. In addition, all or part of these units can be integrated together, or they can be implemented independently. The processing element described here can also be a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each operation of the above method or each unit above can be implemented by an integrated logic circuit of hardware in the processor element or in the form of software calling through a processing element.

[0170] In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASIC), or one or more digital singnal processors (DSP), or one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuit forms. For another example, when the unit in the device can be implemented in the form of a processing element scheduler, the processing element can be a processor, such as a general-purpose central processing unit (CPU), or other processors that can call programs. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0171] The above unit for receiving is an interface circuit of the device, which is used to receive signals from other devices. For example, when the device is implemented in the form of a chip, the receiving unit is an interface circuit of the chip used to receive signals from other chips or devices. The above unit for sending is an interface circuit of the device, which is used to send signals to other devices. For example, when the device is implemented in the form of a chip, the sending unit is an interface circuit of the chip used to send signals to other chips or devices.

[0172] Figure 7This is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application, which may be the terminal device in the above embodiment, and is used to implement the operation of the terminal device in the above embodiment. Figure 7 As shown, the terminal device includes: an antenna 710, a radio frequency part 720, and a signal processing part 730. The antenna 710 is connected to the radio frequency part 720. In the downlink direction, the radio frequency part 720 receives information sent by the network device through the antenna 710, and sends the information sent by the network device to the signal processing part 730 for processing. In the uplink direction, the signal processing part 730 processes the information of the terminal device and sends it to the radio frequency part 720. The radio frequency part 720 processes the information of the terminal device and sends it to the network device through the antenna 710.

[0173] The signal processing part 730 may include a modulation and demodulation subsystem for processing each communication protocol layer of the data; it may also include a central processing subsystem for processing the terminal device operating system and application layer; in addition, it may also include other subsystems, such as a multimedia subsystem, a peripheral subsystem, etc., wherein the multimedia subsystem is used to control the terminal device camera, screen display, etc., and the peripheral subsystem is used to connect with other devices. The modulation and demodulation subsystem can be a separately set chip.

[0174] The modem subsystem may include one or more processing elements 731, for example, a main control CPU and other integrated circuits. In addition, the modem subsystem may also include a storage element 732 and an interface circuit 733. The storage element 732 is used to store data and programs, but the program used to execute the method executed by the terminal device in the above method may not be stored in the storage element 732, but stored in a memory outside the modem subsystem, and loaded and used by the modem subsystem when in use. The interface circuit 733 is used to communicate with other subsystems.

[0175] The modem subsystem can be implemented by a chip, which includes at least one processing element and an interface circuit, wherein the processing element is used to execute each step of any method executed by the above terminal device, and the interface circuit is used to communicate with other devices. In one implementation, the unit of the terminal device that implements each step in the above method can be implemented in the form of a processing element scheduling program. For example, the device for the terminal device includes a processing element and a storage element, and the processing element calls the program stored in the storage element to execute the method executed by the terminal device in the above method embodiment. The storage element can be a storage element on the same chip as the processing element, that is, an on-chip storage element.

[0176] In another implementation, the program for executing the method executed by the terminal device in the above method can be in a storage element on a different chip from the processing element, that is, an off-chip storage element. In this case, the processing element calls or loads the program from the off-chip storage element to the on-chip storage element to call and execute the method executed by the terminal device in the above method embodiment.

[0177] In another implementation, the unit of the terminal device implementing each step in the above method may be configured as one or more processing elements, which are arranged on the modulation and demodulation subsystem. The processing elements here may be integrated circuits, such as one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these integrated circuits. These integrated circuits may be integrated together to form a chip.

[0178] The units of the terminal device implementing the various steps in the above method can be integrated together and implemented in the form of a SOC, and the SOC chip is used to implement the above method. The chip can integrate at least one processing element and a storage element, and the method executed by the above terminal device can be implemented in the form of a program stored in the storage element by the processing element; or, the chip can integrate at least one integrated circuit to implement the method executed by the above terminal device; or, the above implementation methods can be combined, and the functions of some units can be implemented in the form of a processing element calling a program, and the functions of some units can be implemented in the form of an integrated circuit.

[0179] It can be seen that the above apparatus for terminal equipment may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any of the methods performed by the terminal equipment provided in the above method embodiments. The processing element may execute part or all of the steps performed by the terminal equipment in a first manner: that is, by calling a program stored in a storage element; or in a second manner: that is, by combining an integrated logic circuit of hardware in a processor element with instructions to execute part or all of the steps performed by the terminal equipment; of course, the first manner and the second manner may also be combined to execute part or all of the steps performed by the terminal equipment.

[0180] The processing element here is the same as described above and can be implemented by a processor. The function of the processing element can be Figure 6 The processing unit described in the above has the same function. Exemplarily, the processing element may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as one or more ASICs, or one or more microprocessors DSPs, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. The storage element may be implemented by a memory, and the function of the storage element may be the same as Figure 6The storage element can be implemented by a memory, and the function of the storage element can be the same as that of the storage unit described in Figure 6 The storage element may be a memory or a collective name for multiple memories.

[0181] Figure 7 The terminal device shown is capable of implementing various processes involving the terminal device in the above method embodiments. Figure 7 The operations and / or functions of each module in the terminal device shown are respectively for implementing the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0182] See also Figure 8 , is a schematic diagram of the structure of an access network device provided in an embodiment of the present application, and the access network device (or base station) can be applied to Figure 1 In the system architecture shown, the functions of the access network device in the above method embodiment are performed. The access network device 80 may include one or more DUs 801 and one or more CUs 802. The DU 801 may include at least one antenna 8011, at least one radio frequency unit 8012, at least one processor 8013 and at least one memory 8014. The DU 801 part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals to baseband signals, as well as part of baseband processing. The CU 802 may include at least one processor 8022 and at least one memory 8021.

[0183] The CU 802 part is mainly used for baseband processing, controlling the access network equipment, etc. The DU 801 and CU 802 can be physically set together or physically separated, that is, a distributed base station. The CU 802 is the control center of the access network equipment, which can also be called a processing unit, and is mainly used to complete the baseband processing function. For example, the CU802 can be used to control the access network equipment to execute the operation process of the access network equipment in the above method embodiment.

[0184] In addition, optionally, the access network device 80 may include one or more radio frequency units, one or more DUs, and one or more CUs. The DU may include at least one processor 8013 and at least one memory 8014, the radio frequency unit may include at least one antenna 8011 and at least one radio frequency unit 8012, and the CU may include at least one processor 8022 and at least one memory 8021.

[0185] In one example, the CU802 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as a 5G network) with a single access indication, or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 8021 and the processor 8022 may serve one or more boards. In other words, a memory and a processor may be separately set on each board. It may also be that multiple boards share the same memory and processor. In addition, necessary circuits may be provided on each board. The DU801 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as a 5G network) with a single access indication, or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 8014 and the processor 8013 may serve one or more boards. In other words, a memory and a processor may be separately set on each board. It may also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each board.

[0186] Figure 8 The access network device shown can implement various processes involving the access network device in the above method embodiments. Figure 8 The operations and / or functions of each module in the access network device shown are respectively for implementing the corresponding processes in the above method embodiments. For details, please refer to the description in the above method embodiments. To avoid repetition, the detailed description is appropriately omitted here.

[0187] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0188] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0189] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0190] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0191] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and 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: The method is applied to a terminal device, the terminal device operates on multiple downlink carriers, the multiple downlink carriers include a first downlink carrier and a second downlink carrier, and the method includes: Determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information; Acquire first channel information, where the first channel information includes second channel information, and the first downlink carrier and the second downlink carrier share the second channel information; The first channel information is sent to the access network device.

2. The method according to claim 1, characterized in that The first channel information also includes third channel information and fourth channel information; The acquiring the first channel information includes: Performing measurement according to a reference signal of the first downlink carrier to obtain the second channel information and the third channel information; and performing measurement according to a reference signal of the second downlink carrier to obtain the fourth channel information.

3. The method according to claim 1, characterized in that The first channel information also includes third channel information and fourth channel information; The acquiring the first channel information includes: Perform joint measurement based on the reference signal of the first downlink carrier and the reference signal of the second downlink carrier to obtain the second channel information; and perform measurement based on the reference signal of the first downlink carrier to obtain the third channel information; perform measurement based on the reference signal of the second downlink carrier to obtain the fourth channel information.

4. The method according to claim 2 or 3, characterized in that: Sending the first channel information to the access network device includes: The second channel information and the third channel information of the first downlink carrier are sent to the access network device, and the fourth channel information of the second downlink carrier is sent to the access network device.

5. The method according to claim 1, characterized in that Determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information includes: When the first downlink carrier and the second downlink carrier are located in the same frequency band combination, determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information; or, When the difference between the central frequency of the first downlink carrier and the central frequency of the second downlink carrier is less than a first threshold, it is determined that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

6. The method according to claim 1, characterized in that Determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information includes: First indication information is received from the access network device, where the first indication information is used to indicate that the first downlink carrier and the second downlink carrier support sharing of part or all of channel information.

7. The method according to claim 1, characterized in that Determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information includes: Receive configuration information from the access network device, where the configuration information is used to configure a reference signal of the first downlink carrier and a reference signal of the second downlink carrier to have an associated relationship; and determine, based on the configuration information, that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

8. A communication method, characterized in that: The method is applied to an access network device, and the method comprises: Determining that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information; Acquire first channel information, where the first channel information includes second channel information, and the first downlink carrier and the second downlink carrier share the second channel information; Downlink information is sent to a terminal device on the first downlink carrier and / or the second downlink carrier.

9. The method according to claim 8, characterized in that The first channel information also includes third channel information and fourth channel information; The acquiring the first channel information includes: The second channel information and the third channel information of the first downlink carrier are received from the terminal device, and the fourth channel information of the second downlink carrier is received from the terminal device.

10. The method according to claim 8, characterized in that The first channel information also includes third channel information and fourth channel information; The acquiring the first channel information includes: performing joint measurement according to a reference signal of an uplink carrier corresponding to the first downlink carrier and a reference signal of an uplink carrier corresponding to the second downlink carrier to obtain the second channel information; or performing measurement according to a reference signal of an uplink carrier corresponding to the first downlink carrier to obtain the second channel information; The third channel information of the first downlink carrier is received from the terminal device, and the fourth channel information of the second downlink carrier is received from the terminal device.

11. The method according to any one of claims 8 to 10, characterized in that The method further comprises: Sending first indication information to the terminal device, wherein the first indication information is used to indicate that the first downlink carrier and the second downlink carrier support sharing of part or all of the channel information.

12. The method according to any one of claims 8 to 10, characterized in that The method further comprises: Configuration information is sent to the terminal device, where the configuration information is used to configure a reference signal of the first downlink carrier and a reference signal of the second downlink carrier to have an associated relationship.

13. A communication device, characterized in that: Comprising modules for executing the method as claimed in any one of claims 1 to 7.

14. A communication device, characterized in that: Comprising means for executing the method as claimed in any one of claims 8 to 12.

15. A communication device, characterized in that: The method comprises a processor and a memory, wherein the processor and the memory are coupled, and the processor is used to implement the method according to any one of claims 1 to 7.

16. A communication device, characterized in that: The method comprises a processor and a memory, wherein the processor and the memory are coupled, and the processor is configured to implement the method according to any one of claims 8 to 12.

17. A communication device, characterized in that: It includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method as described in any one of claims 1 to 7 through a logic circuit or executing code instructions.

18. A communication device, characterized in that: It includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method as described in any one of claims 8 to 12 through a logic circuit or executing code instructions.

19. A computer-readable storage medium, characterized in that: The storage medium stores a computer program or an instruction. When the computer program or the instruction is executed by the communication device, the method according to any one of claims 1 to 7 or the method according to any one of claims 8 to 12 is implemented.

20. A computer program product, characterized in that When a computer reads and executes the computer program product, the method according to any one of claims 1 to 7 is executed, or the method according to any one of claims 8 to 12 is executed.

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