Information processing method and communication apparatus

Abstract

The present application provides an information processing method and a communication apparatus. The method comprises: a terminal device receiving first information from an access network device, wherein the first information indicates a base of an interference signal corresponding to a first cell, a base of a useful signal corresponding to a cell where the terminal device is located, and a delay offset corresponding to the base of the interference signal, the first cell has a neighbor relationship with the cell where the terminal device is located, and the delay offset is a time interval between the time when the base of the interference signal is used for channel map construction and the time when the base of the interference signal is used for interference cancellation; and then, performing interference cancellation on the useful signal on the basis of the first information. By means of the method, a more accurate useful signal and a more accurate interference signal can be estimated, the correlation between a recovery channel and an ideal channel is improved, and the performance and efficiency of interference cancellation are improved.

Description

Information processing method and communication device

[0001] The present application claims priority to the Chinese patent application No. 202410841059.7, filed on June 26, 2024, with the State Intellectual Property Office of China, and the Chinese patent application No. 202410841059.7 has the title of “Information processing method and communication device”, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to an information processing method and a communication device. BACKGROUND

[0003] With the advent of the sixth generation mobile communication (6th generation mobile networks, 6G) era, the contradiction between the increasing system bandwidth, the increasing number of terminal antennas, the increasing network load, the increasing dimension of wireless channel and the limited pilot measurement resource is becoming increasingly serious, which leads to great challenges for high-precision measurement of wireless channel. Accurate measurement of wireless channel is the cornerstone of mobile communication network research, and is crucial for the design, analysis and optimization of wireless communication network.

[0004] In the process of channel measurement, since the surrounding cells have interference with the neighbor cells of the serving cell, it is necessary to estimate the channel, remove the interference signal from the received signal, realize interference cancellation, and thus obtain accurate channel measurement results. However, the accuracy of current channel estimation is not high, which reduces the performance and efficiency of interference cancellation. SUMMARY

[0005] The present application relates to an information processing method and a communication device, based on the method described in the present application, which is beneficial to improve the performance and efficiency of interference cancellation.

[0006] In a first aspect, an information processing method is provided, which is applied to a terminal device, and the method comprises:

[0007] receiving first information from an access network device; the first information indicating a first base of a first signal corresponding to a first cell, a second base of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first base, and a second time delay offset corresponding to the second base; there is interference between the first cell and the cell where the terminal device is located, the first time delay offset is the time interval between the first base when the channel map is constructed and the first base when it is used, and the second time delay offset is the time interval between the second base when the channel map is constructed and the second base when it is used; and then, performing interference cancellation on the second signal based on the first information.

[0008] Based on the method described in the first aspect, the access network device can send the terminal device information such as the first base of the first signal corresponding to the first cell (i.e., the interference cell), the second base of the second signal corresponding to the cell where the terminal device is located, the first time delay offset corresponding to the first base, and the second time delay offset corresponding to the second base, in a certain format; wherein the first signal can be considered as an interference signal generated by the first cell to the cell where the terminal device is located, the second signal can be considered as a useful signal transmitted by the cell where the terminal device is located, and the second signal contains the interference of the first signal. The terminal device can use the information sent by the access network device to filter the estimated first signal and second signal, obtain more accurate first signal and second signal, and improve the correlation between the recovered channel and the ideal channel; since the second signal contains the interference of the first signal, the first signal can be further used to realize interference cancellation of the second signal, which is beneficial to improve the performance and efficiency of interference cancellation.

[0009] In a possible implementation, the first information further indicates one or more of the following information: an identifier of the first cell, an identifier of the cell where the terminal device is located, a number of the first bases, a type of the first base, a type of the second base, a number of columns of the first base, or a number of columns of the second base.

[0010] In the embodiments of the present application, the access network device further indicates the related information of the first base (i.e., the base of the interference signal) and the related information of the second base (i.e., the base of the useful signal), which is more conducive to assisting the terminal device to perform interference cancellation.

[0011] In a possible implementation, the type of the first base or the type of the second base is any one of the following types: frequency domain, space domain, space-frequency, space-time-frequency, discrete cosine transform (DCT) base, or discrete Fourier transform (DFT) base.

[0012] In the embodiments of the present application, the access network device further specifically describes the type of the signal base, which is conducive to assisting the terminal device to perform interference cancellation.

[0013] In a possible implementation, receiving the first information from the access network device includes: receiving the first information from a radio unit (RU) in the access network device. The embodiments of the present application can be applied to the ORAN architecture.

[0014] In a possible implementation, before performing interference cancellation on the second signal based on the first information, the method further includes: receiving second information from the access network device; and the second information includes a downlink transmission sequence parameter of the first cell, and the downlink transmission sequence parameter is used to estimate the interference signal.

[0015] In the embodiments of the present application, the access network device can indicate the downlink transmission sequence parameter of the first cell to the terminal device, so as to facilitate the terminal device to more accurately estimate the interference signal.

[0016] In a possible implementation, the second information further includes a quantity of the first cell.

[0017] In a possible implementation, the receiving the second information from the access network device includes: receiving the second information from a RU in the access network device. The embodiments of the present application can be applied to the ORAN architecture.

[0018] In a possible implementation, the first information or the second information is carried in any one of the following information: downlink control information DCI, a medium access control control element MAC CE, or a radio resource control RRC.

[0019] In a second aspect, the embodiments of the present application provide an information processing method, applied to an access network device, and the method includes:

[0020] sending first information to a terminal device; the first information indicating a first base of a first signal corresponding to a first cell, a second base of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first base, and a second time delay offset corresponding to the second base; there is interference between the first cell and the cell where the terminal device is located, the first time delay offset is a time interval between when the first base is used and when the first base is used in channel map construction, and the second time delay offset is a time interval between when the second base is used and when the second base is used in channel map construction.

[0021] The beneficial effects of the possible implementation of the second aspect can refer to the beneficial effects of the possible implementation of the first aspect, which will not be repeated here.

[0022] In a possible implementation, the first information further indicates one or more of the following information: an identifier of the first cell, an identifier of the cell where the terminal device is located, a quantity of the first base, a type of the first base, a type of the second base, a column number of the first base, or a column number of the second base.

[0023] In a possible implementation, the type of the first base or the type of the second base is any one of the following types: a frequency domain, a space domain, a space-frequency domain, a space-time-frequency domain, a DCT base, or a DFT base.

[0024] In a possible implementation, the access network device includes a RU; and the sending the first information to the terminal device includes: the RU sending the first information to the terminal device.

[0025] In a possible implementation, the access network device further includes a service unit SU, a centralized unit CU, and a distributed unit DU; before the RU sends the first information to the terminal device, the method further includes: the SU sends the first base, the second base, the first time delay offset, and the second time delay offset to the CU; the SU is configured to construct a channel map; and the CU sends the first base, the second base, the first time delay offset, and the second time delay offset to the RU through the DU.

[0026] The embodiment of the application can be applied to the ORAN architecture, and the SU in the access network device can construct a channel map, which can be defined as a database for storing channel characteristics based on location information. In the channel map, the base of the signal corresponding to each cell and the time delay offset corresponding to the base of the signal can be stored. The CU can obtain the required first base, second base, first time delay offset, and second time delay offset from the SU, and then send these information to the RU through the DU, and then send the information to the terminal device through the RU. In this way, the channel map assisted communication mode can reduce resource overhead and improve transmission efficiency.

[0027] In a possible implementation, before the first information is sent to the terminal device, the method further includes: sending a first request to a map management network element; the first request is used to request the first base, the second base, the first time delay offset, and the second time delay offset, and the first request includes the identifier of the first cell and the identifier of the cell where the terminal device is located; the map management network element is configured to construct a channel map; receiving a first response message from the map management network element in response to the first request; and the first response message includes the first base, the second base, the first time delay offset, and the second time delay offset.

[0028] In the embodiment of the application, the map management network element is a newly added functional network element in the core network, which can construct a channel map, which can be defined as a database for storing channel characteristics based on location information. In the channel map, the base of the signal corresponding to each cell and the time delay offset corresponding to the base of the signal can be stored. The access network device can obtain the required first base, second base, first time delay offset, and second time delay offset from the map management network element, and then send the information to the terminal device, so that the channel map assisted communication mode can reduce resource overhead and improve transmission efficiency.

[0029] In a possible implementation, the access network device includes a CU, a DU, and an RU; sending a first request to a graph management network element includes: the CU sending the first request to the graph management network element; receiving a first response message for the first request from the graph management network element includes: the CU receiving the first response message for the first request from the graph management network element; the method further includes: the CU sending a first base, a second base, a first time delay offset, and a second time delay offset to the RU through the DU.

[0030] The embodiments of the present application can be applied to the ORAN architecture. The CU in the access network device can send a first request to a graph management network element in the core network and receive a first response message for the first request from the graph management network element. Then, the CU sends a first base, a second base, a first time delay offset, and a second time delay offset in the first response message to the RU through the DU.

[0031] In a possible implementation, the method further includes: sending a second request to the first cell; the second request is used to request a downlink transmission sequence parameter of the first cell, the downlink transmission sequence parameter being used to estimate an interference signal; receiving a second response message for the second request from the first cell; the second response message includes the downlink transmission sequence parameter of the first cell; and sending second information to the terminal device; the second information includes the downlink transmission sequence parameter of the first cell.

[0032] In a possible implementation, the second information further includes a quantity of the first cell.

[0033] In a possible implementation, the access network device includes a CU, a DU, and an RU; sending a second request to the first cell includes: the CU sending the second request to the first cell; receiving a second response message for the second request from the first cell includes: the CU receiving the second response message for the second request from the first cell; and sending second information to the terminal device includes: the CU sending the second information to the RU through the DU; and the RU sending the second information to the terminal device. The embodiments of the present application can be applied to the ORAN architecture.

[0034] In a possible implementation, the first information or the second information is carried in any one of the following information: DCI, MAC CE, or RRC.

[0035] In a third aspect, the embodiments of the present application provide an information processing method, applied to a graph management network element, the graph management network element being used to construct a channel graph, and the method includes:

[0036] receiving a first request from the access network device; the first request is used to request a first base of a first signal corresponding to a first cell, a second base of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first base, and a second time delay offset corresponding to the second base; the first request includes an identifier of the first cell and an identifier of the cell where the terminal device is located, there is interference between the first cell and the cell where the terminal device is located, the first time delay offset is a time interval between when the first base is used in channel map construction and when the first base is used, and the second time delay offset is a time interval between when the second base is used in channel map construction and when the second base is used; then, sending a first response message for the first request to the access network device; the first response message includes the first base, the second base, the first time delay offset, and the second time delay offset.

[0037] Based on the method described in the third aspect, the map management network element is a newly added functional network element in the core network, can construct a channel map, and the channel map can be defined as a database for storing channel characteristics based on location information. In the channel map, the base of the signal corresponding to each cell and the time delay offset corresponding to the base of the signal can be stored. The access network device can request the map management network element to issue the required first base, second base, first time delay offset, and second time delay offset. In this way, the channel map assisted communication manner can reduce resource overhead and improve transmission efficiency.

[0038] In a possible implementation, the first request from the access network device is received, including: receiving the first request from the CU in the access network device; and the first response message for the first request is sent to the access network device, including: sending the first response message for the first request to the CU in the access network device. The embodiments of the present application can be applied to the ORAN architecture.

[0039] In a fourth aspect, the embodiments of the present application provide a communication apparatus for executing the method in any of the first aspect to the third aspect or any possible implementation manner of the first aspect to the third aspect. The communication apparatus includes a module for executing the method in any of the first aspect to the third aspect or any possible implementation manner of the first aspect to the third aspect.

[0040] In a fifth aspect, the embodiments of the present application provide a communication apparatus, which includes processing circuitry for executing the method in any of the first aspect to the third aspect or any possible implementation manner of the first aspect to the third aspect. The processing circuitry is configured to execute a program stored in a memory, and when the program is executed, the method in any of the first aspect to the third aspect or any possible implementation manner is executed.

[0041] In a possible implementation, the memory is located outside the communication apparatus.

[0042] In a possible implementation, the memory is located inside the communication apparatus.

[0043] In the embodiments of the present application, the processing circuit and the memory can also be integrated in one device, i.e., the processing circuit and the memory can also be integrated together. For example, the communication apparatus can be a chip.

[0044] In a possible implementation, the communication apparatus further includes a transceiver circuit, which is configured to receive information (or input information) or send information (or output information).

[0045] In a sixth aspect, the embodiments of the present application provide a communication apparatus, which includes a processing circuit and a transceiver circuit, the processing circuit can be a logic circuit, and the transceiver circuit can be an interface circuit, the logic circuit and the interface circuit are coupled; the interface circuit is configured to input and / or output information, and the logic circuit is configured to execute the method in any one of the first aspect to the third aspect or any possible implementation of any one of the first aspect to the third aspect.

[0046] In a seventh aspect, the embodiments of the present application provide a chip, which includes a processing circuit and an interface circuit, the processing circuit and the interface circuit are coupled; the interface circuit is configured to input and / or output information, and the processing circuit is configured to execute code instructions, so that the method shown in any one of the first aspect to the third aspect or any possible implementation is executed.

[0047] In an eighth aspect, the embodiments of the present application provide a computer readable storage medium, which is configured to store a computer program, when the computer program is executed on a computer, the method shown in any one of the first aspect to the third aspect or any possible implementation is executed.

[0048] In a ninth aspect, the embodiments of the present application provide a computer program product, when the computer program product is executed on a computer, the method shown in any one of the first aspect to the third aspect or any possible implementation is executed.

[0049] In a tenth aspect, the present application provides a communication system, which includes a terminal device, an access network device and a graph management network element, the terminal device is configured to execute the method shown in the first aspect or any possible implementation of the first aspect, the access network device is configured to execute the method shown in the second aspect or any possible implementation of the second aspect, and the graph management network element is configured to execute the method shown in the third aspect or any possible implementation of the third aspect. BRIEF DESCRIPTION OF DRAWINGS

[0050] FIG. 1A is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0051] FIG. 1B is a schematic diagram of a network architecture of a communication system according to an embodiment of the present application;

[0052] FIG. 2 is a schematic diagram of an ORAN system according to an embodiment of the present application;

[0053] FIG. 3 is a schematic diagram of an architecture of a RAN chip according to an embodiment of the present application;

[0054] FIG. 4 is a schematic diagram of an architecture of a core network according to an embodiment of the present application;

[0055] FIG. 5A is a schematic diagram of digital twinning according to an embodiment of the present application;

[0056] FIG. 5B is a schematic diagram of a channel map construction scheme according to an embodiment of the present application;

[0057] FIG. 6 is a schematic diagram of a flow of an information processing method according to an embodiment of the present application;

[0058] FIG. 7A is a schematic diagram of a delay offset of an interference floor on a PDP when an interference floor is used on a PDP and a current channel of a terminal device according to an embodiment of the present application;

[0059] FIG. 7B is a schematic diagram of a flow of another information processing method according to an embodiment of the present application;

[0060] FIG. 8 is a schematic diagram of a flow of another information processing method according to an embodiment of the present application;

[0061] FIG. 9 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0062] FIG. 10 is a schematic diagram of a structure of another communication apparatus according to an embodiment of the present application;

[0063] FIG. 11 is a schematic diagram of a structure of another communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0064] To facilitate understanding of the technical solutions of the present application, the present application will be further described below with reference to the drawings.

[0065] The terms "first" and "second" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a specific sequential or chronological order. Descriptions using the terms "including", "containing", "comprising", "having" and the like are meant not to be limiting. For example, a process, method, object, or apparatus that comprises a list of steps or elements is not necessarily limited to only those steps or elements but can include other not expressly listed steps or elements. Further, unless in particular circumstances, clear from the context, expressions such as "a" or "an" typically shoulder "one or more" or "at least one".

[0066] Reference throughout this document to "embodiments" means embodiments that either incorporate the particular feature, structure, or characteristic being described. Multiple embodiments can be described in this document, and each of the embodiments can include combinations of the described features, structures, or characteristics. The phraseology "at least one of" is used to describe combinations of items, for example, "at least one of A and B" can mean A or B or both A and B.

[0067] In this document, "a" or "an" can mean one or more than one. "Plural" can mean two or more than two. "At least two" can mean two or more than two. "And / or" is used to describe combinations of items, for example, "A and / or B" can mean A or B or both A and B. "Or" is used to describe combinations of items, for example, "A or B" can mean A or B or both A and B. The character " / " is generally used to indicate an "or" relationship between the associated objects. "At least one of" or similar expressions means any combination of the items. For example, "at least one of a, b, or c" can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c".

[0068] In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, and also includes indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be carried out between devices, for example, between network devices and terminal devices, or can be carried out within a device, for example, between components, between modules, between chips, between software modules or hardware modules within a device through a bus, a wire or an interface.

[0069] In order to better understand the embodiments of the present application, first, the communication system related to the embodiments of the present application will be introduced as follows:

[0070] The method provided by the embodiments of the present application can be applied to various communication systems, for example: a wireless local area network (WLAN) communication system, a wireless fidelity (Wi-Fi) system, a multiple-in multiple-out (MIMO) communication system, a long term evolution (LTE) system, an internet of things (IoT) system, a narrow band internet of things (NB-IoT) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a 5th generation (5G) system or a new radio (NR), and other future communication systems, for example, a 6th generation (6G) system, and the like. Among them, the IoT network may, for example, include but is not limited to a vehicle internet. The communication mode in the vehicle internet system can be collectively referred to as vehicle-to-everything (V2X, X can represent any thing). For example, V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian (V2P) communication or vehicle to network (V2N) communication, and the like. The method provided by the embodiments of the present application also supports a communication system of multiple wireless technology fusion, for example, can also be applied to a system of unmanned aerial vehicle, satellite communication system, high altitude platform (HAPS) communication and the like non-terrestrial network (NTN) fusion ground mobile communication network. In addition, it can also be applicable to low frequency (sub 6GHz) and high frequency (above 6GHz) communication scenarios. It can be understood that the system architecture described in the embodiments of the present application is to make the technical solution of the embodiments of the present application more clear, and does not constitute a limitation on the technical solution provided by the embodiments of the present application.

[0071] The method provided by the embodiments of the present application can be applied to two entities in a communication system, for example, one of the two entities can send information to the other entity or receive information sent by the other entity. In a wireless communication system, communication devices are included, and the communication devices can perform wireless communication by using air interface resources. The air interface resources can include at least one of time domain resources, frequency domain resources, code resources and space resources, which are not limited by the present application. For example, the two entities can include a network device and a terminal device, or a chip that can be placed in the network device and a chip that can be placed in the terminal device, and the like. Of course, with the development of standards, other types of entities can also appear in the future, which are not limited by the embodiments of the present application.

[0072] FIG. 1A is a schematic diagram of an architecture of a communication system provided by the embodiments of the present application. As shown in FIG. 1A, a terminal device can access a wireless network to obtain services of an external network (for example, a data network (DN)) through the wireless network, or communicate with other devices through the wireless network, for example, communicate with other terminal devices. The wireless network includes a (radio) access network ((R)AN) and a core network (CN), wherein the (R)AN (hereinafter referred to as RAN) is used to access the terminal device to the wireless network, and the CN is used to manage the terminal device and provide a gateway for communication with the DN. FIG. 1B takes the RAN, the CN and a plurality of terminal devices as an example. The plurality of terminal devices can be cellular phones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, personal digital assistants (PDAs) and / or any other suitable devices for communicating on a wireless communication system, and can all be connected with the RAN. The terminal devices can all communicate with the RAN, and the RAN can communicate with the CN. In addition, the terminal devices and the terminal devices can also communicate with each other, for example, device-to-device (D2D) transmission. Of course, the number of terminal devices and the RAN in FIG. 1B is only an example, and there can be fewer or more. The terminal devices, the RAN, the CN and the DN involved in the communication system are described in detail below.

[0073] I. Terminal device

[0074] The terminal device mentioned in the embodiments of the present application can be a device with wireless transceiving function. The terminal device can communicate with an access network device (or also referred to as an access device or a network device) in a radio access network (RAN). The terminal device can also be referred to as a user equipment (UE), an access terminal, a terminal, a subscriber unit, a user station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a user agent, or a user apparatus, etc. In a possible implementation manner, the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; or can be deployed on water, including a ship; or can be deployed in the air, such as an airplane, a balloon or a satellite, etc. In another possible implementation manner, the terminal device can be a handheld device, a vehicle-mounted device, a wearable device, a sensor, a terminal in Internet of Things, a terminal in Internet of Vehicles, a drone, a terminal device in 5G network or future network with wireless communication function, etc., which is not limited in the embodiments of the present application. In yet another possible implementation manner, the terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in smart power grid, a wireless terminal in smart city, or a wireless terminal in smart home, etc.

[0075] In the embodiments of the present application, the device for implementing the function of the terminal device can be the terminal device; or can be a device capable of supporting the terminal device to implement the function, such as a chip system. The device can be installed in the terminal device or used in matching with the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. For ease of description, the device for implementing the function of the terminal device is taken as an example to describe the technical solutions provided by the embodiments of the present application when some examples are involved.

[0076] II. RAN

[0077] The RAN can include one or more RAN devices (or network devices, access network devices, access devices, etc.), which is a device deployed in a wireless access network to provide wireless communication services for terminal devices. The interface between the access network device and the terminal device can be a Uu interface (or air interface). Of course, in the communication evolved after 5G, the names of these interfaces can remain unchanged, or can be replaced by other names, which are not limited in the present application.

[0078] The access network device is a node or device for accessing a terminal device to a wireless network, and the access network device includes, for example, but is not limited to: a next generation node B (gNB) in a 5G communication system, an evolved node B (eNB), a next generation evolved node B (ng-eNB), a wireless backhaul device, a radio network controller (RNC), a node B (NB), a home evolved node B (HeNB) or a home node B (HNB), a baseband unit (BBU), a transmitting and receiving point (TRP), a transmitting point (TP), a mobile switching center, a device-to-device (D2D) device, a vehicle-to-everything (V2X) device, a machine-to-machine (M2M) device, and the like, which can also include a centralized unit (CU) and a distributed unit (DU) in a cloud radio access network (C-RAN) system, a network device in a non-terrestrial network (NTN) communication system, which can be deployed on a high-altitude platform or a satellite, and the like. The RAN in the present application can be a RAN for 5G or a RAN for 6G, and the present application does not limit the RAN.

[0079] In some deployments of the access network device, the access network device can include a centralized unit (CU), a distributed unit (DU), a radio unit (RU), and the like. Optionally, the access network device can also include a service unit (SU). For example, the functions of part of the protocol layers of the access network device are placed in the CU for centralized control, and the remaining part or all of the protocol layers are distributed in the DU, which is controlled by the CU; the SU can be used to perform service functions, such as constructing a channel map, and the like. In other deployments of the access network device, the CU can also be divided into a CU-control plane (CP) and a CU-user plane (UP), and the like.

[0080] In yet some deployments of the access network device, the access network device can also be an open radio access network (ORAN) architecture. When the access network device is an ORAN architecture, the access network device can be a functional entity or module in the ORAN, etc. For example, the access network device can be a combination of one or more of a CU, a DU, or a RU. In the ORAN system, the CU can also be referred to as an open (O)-CU, the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, etc. The deployment manners of the access network device listed herein are only examples, and as the standard technology evolves, there can be other deployment forms of the access network device, which are not limited by the embodiments of the present application.

[0081] In some deployments, multiple RAN nodes cooperate to assist the terminal to implement wireless access, and different RAN nodes respectively implement part of the functions of the access network. For example, the RAN node can be a CU, a DU, a CU-CP, a CU-UP, or a RU, etc. The CU and the DU can be separately arranged, or can also be included in the same network element, such as a building base band unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0082] The RAN node can support one or more types of fronthaul interfaces, different fronthaul interfaces respectively corresponding to DUs and RUs having different functions. If the fronthaul interface between the DU and the RU is a common public radio interface (CPRI), the DU is configured to implement one or more of the baseband functions, and the RU is configured to implement one or more of the radio frequency functions. If the fronthaul interface between the DU and the RU is another interface, relative to the CPRI, one or more of the partial baseband functions of the downlink and / or uplink, such as, for the downlink, precoding, digital beamforming (BF), or inverse fast Fourier transform (IFFT) / add cyclic prefix (CP), are moved from the DU to the RU for implementation, and for the uplink, one or more of the digital beamforming (BF), or fast Fourier transform (FFT) / remove cyclic prefix (CP) are moved from the DU to the RU for implementation. In a possible implementation, the interface can be an enhanced common public radio interface (eCPRI). Under the eCPRI architecture, the splitting manner between the DU and the RU is different, corresponding to different categories (Cat) of eCPRI, such as eCPRI Cat A, B, C, D, E, and F.

[0083] In a possible design, the processing unit in the BBU for implementing the baseband function is referred to as a base band high (BBH) unit, and the processing unit in the RRU / AAU / RRH for implementing the baseband function is referred to as a base band low (BBL) unit.

[0084] In different systems, the CU (or CU-CP and CU-UP), DU, or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an ORAN system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. Any of the CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0085] Figure 2 is a schematic diagram of an ORAN system according to embodiments of the present application. An access network device (RAN, which can be an eNB or gNB or next generation access network device) communicates with a core network (CN) over a backhaul link and communicates with a user equipment (UE) over an air interface.

[0086] Specifically, the access network device can include a BBU (including a CU, a DU), and an RU. The BBU in the access network device communicates with the core network over a backhaul link, and the RU in the access network device communicates with at least one UE over an air interface. The BBU communicates with at least one RU over a fronthaul link. The BBU and the RU can be co-located or not co-located.

[0087] In some examples, the access network device further includes an SU connected to the CU. The SU can be used to perform service functions, such as constructing a channel map, etc. The BBU includes at least one CU and at least one DU, which can communicate over at least one midhaul link.

[0088] In some examples, the CU is a logical node that carries the radio resource control (RRC) layer, the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, and other control functions of the access network device. The CU is connected to network nodes such as the core network through some interfaces, which can be E2 interfaces or the like. Optionally, the CU can have part of the functions of the core network. The CU (e.g., the PDCP layer and higher layers) is connected to the DU (e.g., the RLC layer and lower layers) through some interfaces, which can be F1 interfaces or the like. In some examples, these interfaces (e.g., the F1 interface) can provide control plane (C-Plane) and user plane (U-Plane) functions (e.g., interface management, system information management, UE context management, RRC message transmission, etc.). The F1AP is an application protocol for the F1 interface, which defines the signaling procedures of the F1 in some examples. The F1 interface supports a control plane F1-C and a user plane F1-U.

[0089] In some examples, a CU can be split into a CU-CP and a CU-UP, where the CU-CP is a logical node carrying RRC layer and PDCP-C (control plane part of PDCP) layer, for implementing control plane functions of the CU. The CU-CP can interact with a network element in the core network for implementing control plane functions. The network element in the core network for implementing control plane functions can be an access and mobility function network element, such as an access and mobility management function (AMF) in a 5G system. The AMF network element is configured to be responsible for mobility management in a mobile network, such as location update of a terminal device, registration network of the terminal device, handover of the terminal device, and the like. The CU-UP is a logical node carrying SDAP layer and PDCP-U (user plane part of PDCP) layer, for implementing user plane functions of the CU. The CU-UP can interact with a network element in the core network for implementing user plane functions. The network element in the core network for implementing user plane functions, for example, a user plane function (UPF) in a 5G system, is configured to be responsible for forwarding and receiving data in a terminal device. The above configuration of the CU and the DU is merely an example, and the CU and the DU can be configured to have other functions according to needs. For example, the CU or the DU can be configured to have more protocol layer functions, or the CU or the DU can be configured to have partial processing functions of the protocol layers. For example, partial functions of the RLC layer and functions of the protocol layers above the RLC layer are configured in the CU, and the remaining functions of the RLC layer and functions of the protocol layers below the RLC layer are configured in the DU. For another example, the functions of the CU or the DU can be divided according to service types or other system requirements, for example, functions requiring to meet a shorter delay requirement in processing time are configured in the DU, and functions not requiring to meet the delay requirement are configured in the CU.

[0090] In some examples, a DU is a logical node carrying a radio link control (RLC) layer, a medium access control (MAC) layer, a higher physical layer (Higher PHY) layer, and other functions. In some examples, the DU can control at least one RU. The DU is connected to the RU through some interfaces, which can be a front-haul interface. In some examples, the Higher PHY layer includes part of the PHY layer processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, and the like.

[0091] In some examples, an RU is a logical node that hosts lower physical layer (Lower PHY) and radio frequency (RF) processing. In some examples, an RU can be a 3GPP transmission reception point (TRP) or a remote radio frequency head (RRH) or other similar functional entity. In some examples, a Low-PHY includes portions of PHY processing such as fast Fourier transform (FFT), inverse fast Fourier transformation (IFFT), digital beamforming and filtering, and other processing functions. An RU communicates with one or more UEs over a wireless link.

[0092] A DU and an RU can or can not be co-located. A DU and an RU exchange control plane information and user plane information over a fronthaul link via a lower-layer split-control, user and synchronization (LLS-CUS) interface. The LLS-CUS can include a LLS-C interface and a LLS-U interface that provide control plane (C-Plane) and user plane (U-Plane), respectively. In some examples, the control plane (C-Plane) refers to real-time control between a DU and an RU. A DU and an RU have a LLS-M interface of the fronthaul link to exchange management information, and the management plane (M-Plane) refers to non-real-time management operations between the DU and the RU.

[0093] A DU and an RU can cooperate to collectively implement the functionality of a PHY layer. A DU can be connected to one or more RUs. The functionality that a DU and an RU have can be configured in multiple ways according to design. For example, a DU is configured to implement baseband functionality and an RU is configured to implement mid- RF functionality. As another example, a DU is configured to implement high-layer functionality in a PHY layer and an RU is configured to implement low-layer functionality in the PHY layer or to implement the low-layer functionality and RF functionality. The high-layer functionality in the PHY layer can include a portion of functionality of the PHY layer that is closer to a MAC layer, and the low-layer functionality in the PHY layer can include another portion of functionality of the PHY layer that is closer to a mid-RF side.

[0094] Figure 3 is a schematic diagram of an architecture of a RAN chip provided by an embodiment of the present application, which is divided into CU, DU and RU. The CU is a platform that performs upper layer L2 and L3 functions. The midhaul and backhaul interfaces are used to carry traffic between the CU and the DU and between the CU and the core network. The DU performs L1 and part of L2 functions, and the RU performs L1 computation and RF digital part functions. The fronthaul and backhaul interfaces are used to carry traffic between the RU and the DU and between the CU and the DU. The integrated DU includes the functions of the DU and the RU described above.

[0095] The CU / DU hardware includes a chassis platform, a mainboard, peripherals and cooling equipment. The mainboard contains a processing unit, a memory, internal I / O interfaces and external connection ports. The hardware accelerator is designed with an interface, and the hardware function components include storage of software, hardware and system debugging interfaces, and a single-board management controller.

[0096] The DU system is usually implemented using a multi-core processor and one or more hardware accelerators. Part of the DU protocol stack can be implemented in software running on the multi-core processor, and the computation-intensive L1 and L2 functions can be offloaded to the FPGA / GPU-based hardware accelerator; or all the L1 functions are offloaded to the FPGA / GPU-based hardware accelerator, and other protocol stack contents are implemented in software running on the processor; or all the protocol stack is implemented in software running on the processor. The hardware accelerator supports interconnection with an x86 or non-x86 processor. Similarly, the accelerator has a multi-channel PCIe interface pointing to the CPU and is externally connected through GbE connection.

[0097] The RU includes three parts: an ORAN processing unit (OPU) that receives eCPRI frames from the ORAN front haul and performs the front haul interface, the lowest layer L1 (encoding, scrambling, modulation, layer mapping, precoding), synchronization, beamforming and resource unit mapping. The OPU can be implemented as a CPU, FPGA or ASIC. The digital processing unit (DPU) of the O-RU performs synchronization, DDC (digital down conversion in UL), DUC (digital up conversion in DL), CFR and DPD to improve the power amplifier efficiency by reducing the PAPR / ACLR of the RF front end; the DPU can be implemented as an FPGA or ASIC. The RF processing unit of the O-RU includes a transceiver module, an up / down converter, a power amplifier (PA), a low-noise amplifier (LNA), a Tx / Rx filter. All conversions (DAC and ADC) between the analog and digital domains (for example, (RF sampling, using RF, IF and LO mixing for frequency conversion in upconversion and downconversion)) are performed within the transceiver module. Note that the physical and logical partitions within the RF processing unit do not require specific boundaries.

[0098] It should be noted that the access network device and / or the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed on the aircraft, balloon and satellite in the air. The scene where the access network device and the terminal device are located is not limited in the embodiments of the present application. In addition, the terminal device and the access network device can be hardware devices, or software functions running on special hardware, software functions running on general hardware, such as virtualized functions instantiated on a platform (for example, a cloud platform), or entities including special or general hardware devices and software functions. The specific form of the terminal device and the access network device is not limited in the present application.

[0099] In the embodiments of the present application, the device for implementing the function of the access network device can be an access network device; or can be a device capable of supporting the access network device to implement the function, such as a chip system. The device can be installed in the access network device or used in matching with the access network device. For ease of description, when some specific examples are involved below, the device for implementing the function of the access network device is taken as a base station to describe the technical solutions provided by the embodiments of the present application.

[0100] III. CN

[0101] The CN can include one or more CN devices (that is, can be understood as network element devices or functional network elements (network function, NF)). Hereinafter, the CN devices are collectively referred to as core network elements.

[0102] Please refer to FIG. 4, which is a schematic diagram of an architecture of a core network provided in an embodiment of the present application. The CN in FIG. 4 is a schematic diagram of the CN in FIG. 1A, FIG. 1B, FIG. 2 to FIG. 4. The CN shown in FIG. 4 includes a plurality of CN devices: a network slice selection function (NSSF), a network exposure function (NEF), a network function repository function (NRF), a policy control function (PCF), a unified data management (UDM), an application function (AF), a network slice specific authentication and authorization function (NSSAAF), an authentication server function (AUSF), an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), a service communication proxy (SCP), a network slice admission control function (NSACF), a map management function (MMF), and a location management function (LMF). Among them:

[0103] The AMF is a control plane function provided by an operator network, responsible for access control and mobility management of terminal devices accessing the operator network, including, for example, functions such as mobile state management, allocation of user temporary identity, authentication and authorization of users, etc.

[0104] The MMF is a new network element of the core network, which can be referred to as a map management network element, and is used to construct a channel map and realize the association of a grid and a scatterer. The channel map can be regarded as a database for storing channel characteristics based on location information, which includes a channel statistical covariance matrix, an angle spectrum, a time delay spectrum, a path loss, and the like. Specifically, a physical cell is divided into a two-dimensional grid, and each grid point stores a plurality of channel characteristics in the form of a matrix, a vector, or a scalar, thereby constructing a channel map.

[0105] The LMF is mainly used to provide location positioning for services such as emergency rescue, navigation, and location-based management. The LMF can determine the location information of a UE according to the request of a core network entity (such as an AMF) and provide the location information of the UE to the AMF, thereby providing location services (LCS).

[0106] The SMF is a control plane function provided by an operator network, which is responsible for managing a protocol data unit (PDU) session of a terminal device. The PDU session is a channel for transmitting a PDU, and the terminal device needs to transmit the PDU with a DN through the PDU session. The PDU session is established, maintained, and deleted by the SMF. The SMF includes functions such as session management (such as session establishment, modification, and release, including tunnel maintenance between a UPF and a RAN), selection and control of the UPF, selection of a service and session continuity (SSC) mode, roaming, and other session-related functions. In the embodiments of the present application, the access network device communicates with the AMF through an NG-C interface, and the AMF serves as a router for communication between the access network device and the LMF; the MMF implements channel map construction and updating, and the MMF communicates with the AMF through an NLs interface. The LMF is a positioning management unit, which implements location estimation of a UE; and the SMF implements echo perception acquisition.

[0107] The PCF is a control plane function provided by an operator, which includes user subscription data management functions, policy control functions, charging policy control functions, quality of service (QoS) control, and the like, and is mainly used to provide a PDU session policy to the SMF. The policy can include charging-related policies, QoS-related policies, authorization-related policies, and the like.

[0108] The UPF is a gateway provided by an operator, which is a gateway for communication between an operator network and a DN. The UPF includes functions related to a user plane, such as data packet routing and transmission, packet detection, QoS processing, uplink packet detection, and downlink data packet storage.

[0109] The UDM is mainly used for managing subscription data and authentication data of a user, and performing authentication credit processing, user identification processing, access authorization, registration / mobility management, subscription management, and short message management. In some embodiments, a unified data repository (UDR) can also be included in the UDM. Alternatively, in other embodiments, the 3GPP SBA of the 5G system can also include the UDR. The UDR is used for providing storage and retrieval for PCF policies, storage and retrieval of open structured data, and storage of user information requested by application functions, etc.

[0110] It should be noted that the CN device described above can also be referred to as a network element or a functional network element. In the 5G communication system, the names of the functional network elements can be as shown in FIG. 4, and in the communication system evolved after 5G (such as the 6G communication system), the names of the functional network elements can still be as shown in FIG. 4, or can have other names. For example, in the 5G communication system, the user plane function can be a UPF, and in the communication system evolved after 5G (such as the 6G communication system), the user plane function can still be a UPF, or can have other names, which are not limited by the present application.

[0111] It should also be noted that in the 5G communication system, the functions implemented by the functional network elements can be independent as shown in FIG. 4, and in the communication system evolved after 5G (such as the 6G communication system), the functional network elements can still be in the independent state as shown in FIG. 4, or can be integrated functional network elements implementing the functions of multiple functional network elements in FIG. 4. For example, in the 5G communication system, the user plane related function is implemented by the UPF, and the access and mobility management related function is implemented by the AMF, and in the communication system evolved after 5G (such as the 6G communication system), the user plane related function can still be implemented by the UPF, and the access and mobility management related function can still be implemented by the AMF, or a integrated functional network element can simultaneously implement the user plane related function and the access and mobility management related function, which are not limited by the present application.

[0112] In FIG. 4, Nnssf, Nnef, Nnrf, Npcf, Nudm, Naf, Nnssaaf, Nausf, Namf, Nsmf, Nnsacf, N1, N2, N3, N4, and N6 are interface sequence numbers. The meanings of these interface sequence numbers can be referred to the meanings defined in the relevant standard protocols, which are not limited herein.

[0113] IV. DN

[0114] The DN can also be referred to as a packet data network (PDN), which is a network outside the operator network. The operator network can access multiple DNs, and multiple application servers corresponding to various services can be deployed in the DN to provide various possible services for terminal devices.

[0115] In order to facilitate understanding of the scheme provided by the embodiments of the present application, the related concepts involved in the embodiments of the present application are introduced as follows:

[0116] 1. Digital channel twin technology

[0117] The 5G communication system provides extremely high spectrum efficiency, extremely low communication delay, extremely high connection density and extremely low power consumption; 5G communication has higher requirements for system capacity and spectrum efficiency. As the opening technology of everything connected, 5G communication needs to improve the depth of information interaction to meet the needs of future deep wireless communication networks. 5G Advanced wireless communication further improves the information interaction capability to meet the deep mobile Internet demand, thereby continuously expanding the depth and breadth of information interaction, and ultimately realizing the true sense of everything connected. On this basis, the future 6G communication network greatly expands the breadth and depth of communication coverage, and deeply integrates with deep-sea ocean communication, aviation communication and satellite communication on the basis of traditional cellular communication.

[0118] In the development of 5G, 5G Advanced to 6G, digital twinning is an important technology for depicting, simulating, optimizing and visualizing the physical world in the virtual world. As shown in FIG. 5A, the physical world provides perception data for constructing the virtual world; the virtual world provides simulation data for guiding the system design and algorithm optimization of the physical world.

[0119] Physical channels are the basis of digital twin models. Accurate perception and understanding of physical channels are the prerequisite for establishing digital twin channels. In physical channels, environmental electronic maps (including terrain, building distribution, river distribution, vegetation distribution, material electromagnetic parameters, etc.) are physical entities. Digital twin channel models describe the interaction and coupling relationship of physical entities, thereby analyzing and predicting the changes of wireless propagation channels. Virtual channels are the real, objective, and complete mapping of physical channels in digital space and are the carriers of digital twin channel data. Virtual channels include geometric models, physical models, behavior models, and rule models. Geometric models can describe physical entities involved in physical channels, such as the three-dimensional model of the geometric parameters (size, position, etc.) of terrain and objects, achieving good spatiotemporal consistency with physical entities. Physical models describe the physical properties and characteristics of physical channels based on geometric models. Through digital simulation tools, the structure and electromagnetic field in the wireless channel are simulated and analyzed to achieve dynamic approximation simulation of the channel. Behavior models depict the changes of physical channels at different granularities caused by external environmental disturbances, such as the evolution of channel models with spatial changes and the changes of channels with time advancement.

[0120] In actual communication, the application of digital twin channel technology can more effectively master the full life cycle of communication transmission; more accurately feedback the communication efficiency to the design end; and reduce the feedback overhead and latency of end-to-end, etc.

[0121] 2. Channel atlas

[0122] The channel atlas can be defined as a database for storing channel characteristics based on location information, including channel statistical covariance matrix, angle spectrum, time delay spectrum, and path loss. Specifically, physical cells can be divided into two-dimensional grid points. Each grid point stores several channel characteristics in the form of matrix, vector, or scalar, thereby constructing a channel atlas.

[0123] With the advent of the 6G era, the contradiction between the increasing dimensions of wireless channels and the limited pilot measurement resources is becoming increasingly serious, leading to significant challenges in high-precision wireless channel measurement. Accurate measurement of wireless channels is the cornerstone of mobile communication network research and is crucial for the design, analysis, and optimization of wireless communication networks. Traditional wireless channel measurement methods based on pilot symbols cannot meet the needs of the development of next-generation communication technologies, and finding new channel measurement methods has become a hot research topic.

[0124] To solve the problem of limited pilot measurement resources in a wireless communication system, channel mapping can be used to implement low pilot overhead channel measurement. For example, a candidate beam set for a specific location is provided through channel mapping to reduce the overhead of beam scanning in actual communication; a channel covariance matrix for a specific location is provided through channel mapping to use prior channel covariance matrix information to assist in reducing sounding reference signal (SRS) pilot overhead.

[0125] For the construction method of the channel map, one construction method is to construct the channel map through measured channel data. Considering the problem that the amount of measured data is large and the data is difficult to obtain in many scenarios, the channel characteristics of other unmeasured areas are obtained by using interpolation technology to obtain the channel characteristics of the measured data in part of the area, so as to construct the channel map of all areas. As shown in FIG. 5B, the black squares represent measured data, and the white squares represent interpolated data. Traditional interpolation methods include nearest neighbor method, linear interpolation method, kernel interpolation method, etc. Another construction method of the channel map is a deterministic channel modeling scheme based on a map. In combination with prior environmental map (environmental input), the reflection, diffraction, scattering characteristics of communication multipath are simulated by using electromagnetic simulation calculation, so as to obtain a deterministic channel for constructing a channel map.

[0126] 3. Wanted signal and interference signal

[0127] The wanted signal refers to a signal that transmits information required by a user, or a signal that is used to make the receiving device produce a predetermined action after receiving the signal. The interference signal refers to a signal that causes damage to the reception of the wanted signal, including four forms of co-channel interference, intermodulation interference, spurious interference, and adjacent channel interference. In the process of signal transmission, the interference signal falling into the channel will also be transmitted together with the wanted signal received by the receiving end, causing damage to the reception of the wanted signal (at this time, it can be considered that the interference signal is mixed in the wanted signal), thereby affecting the communication quality.

[0128] 4. Interference cancellation

[0129] Interference cancellation is to estimate the interference introduced by different users and multipaths, and then subtract the estimate of the interference from the received signal. Taking adjacent cell interference as an example, in the process of channel measurement, since the surrounding cells have adjacent cell interference to the serving cell, the interference signal needs to be estimated, and the interference signal is removed from the received signal to achieve interference cancellation, so as to obtain accurate channel measurement results. That is, the principle of inter-cell interference cancellation is to demodulate or even decode the interference signal of the interfering cell to some extent, and then use the processing gain of the receiver to cancel the interference signal component from the received signal.

[0130] For the interference cancellation technology based on interference reconstruction / subtraction, the technology is to reconstruct the interference signal after demodulation / decoding of the interference signal, and then subtract the interference signal from the received signal. If the interference signal component can be accurately subtracted, the remaining is the useful signal and noise, which is undoubtedly a more effective interference cancellation technology. However, since the interference signal needs to be completely demodulated or even decoded, higher requirements or more restrictions are brought to the design of the system such as resource block allocation, channel estimation, synchronization, signaling, etc.

[0131] The key of interference cancellation is interference channel estimation. The so-called channel estimation refers to the process of estimating the model parameters of a hypothetical channel model from the received data. The current interference channel estimation technology is to measure by using channel state information intermodulation (CSI-IM) reference signal. Wherein, CSI represents the state information of the wireless channel, which is used to describe the channel fading interference and noise characteristics; IM refers to the intermodulation component generated by the signal in the nonlinear device, which will cause intermodulation interference in the frequency spectrum. The basic idea of CSI-IM interference channel estimation is to use the characteristics of CSI reflecting channel state information and the intermodulation component caused by IM to evaluate and measure the strength and influence of the interference. However, such a way can only measure the strength of the interference signal, cannot obtain the interference channel matrix, and cannot accurately solve the useful channel, so as to cannot accurately perform interference cancellation, and reduce the performance and efficiency of interference cancellation.

[0132] Therefore, in order to improve the performance and efficiency of interference cancellation, the embodiment of the present application provides an information processing method and a communication device. The information processing method and the communication device provided by the embodiment of the present application are described in detail as follows.

[0133] FIG. 6 is a flow diagram of an information processing method provided by an embodiment of the present application. As shown in FIG. 6, the information processing method includes the following steps S601 and S602. Optionally, the information processing method further includes the following steps s11 and s12. Optionally, the information processing method further includes the following steps s31 and s32. Optionally, the information processing method further includes the following steps s41-s43. The method execution subject shown in FIG. 6 can be the access network device and the terminal device mentioned above. Alternatively, the method execution subject shown in FIG. 6 can be a chip in the access network device and a chip in the terminal device, which is not limited in the embodiment of the present application. FIG. 6 takes the access network device and the terminal device as the execution subject of the method as an example for description. Wherein, the graph management network element can be an independent device in the core network, or its functions can be integrated in the access network device, which is not limited herein.

[0134] S601, the access network device sends first information to the terminal device, the first information indicating a first base of a first signal corresponding to a first cell, a second base of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first base, and a second time delay offset corresponding to the second base. Correspondingly, the terminal device receives the first information from the access network device.

[0135] In the embodiments of the present application, there is interference between the first cell and the cell where the terminal device is located. The first cell can also be referred to as an interfering cell. For example, the first cell can be a neighboring cell (or a neighboring area, i.e., a neighboring cell) of the cell where the terminal device is located, or can be another cell that causes interference to the cell where the terminal device is located, which is not limited herein. The first cell can be one or more.

[0136] The first cell can be a neighboring cell that meets certain conditions after the terminal device performs neighboring area measurement, for example, a neighboring cell that meets Event A3 (Event A3). The so-called Event A3 means that the neighboring cell becomes offset better than the current serving cell by a relative value (neighbour becomes offset better than SpCell), in units of dB. It can also be an interfering cell whose interference strength reaches a preset threshold after measurement by the terminal device. It can also be all cells that cause interference to the cell where the terminal device is located, which is not limited herein.

[0137] The so-called base is a base vector, which is a special vector (called a base vector) in a vector space, such that any vector in the vector space can be uniquely expressed as a linear combination of the base vectors. Similarly, the base of the signal is a set of base vectors that can be used to represent the signal by linear combination.

[0138] The base of the first signal corresponding to the first cell (which can be considered as the interference signal of the first cell to the terminal device in the current serving cell, and specifically the base of the interference signal from the base station of the first cell to the terminal device in the current serving cell) can also be referred to as the interference base corresponding to the first cell, and the base of the second signal corresponding to the cell where the terminal device is located (which can be considered as the useful signal of the cell where the terminal device is located) can also be referred to as the useful base corresponding to the cell where the terminal device is located. Exemplarily, the first signal corresponding to the first cell can be represented by linear combination of the interference base, and the second signal corresponding to the cell where the terminal device is located can be represented by linear combination of the useful base.

[0139] The first time delay offset corresponding to the first base corresponds to a time interval between when the first base is used in constructing the channel map and when the first base is used. The second time delay offset corresponding to the second base corresponds to a time interval between when the second base is used in constructing the channel map and when the second base is used. The construction of the channel map can be implemented by an SU in the access network device or by a map management network element, which is not limited herein.

[0140] Generally, the interference base used in constructing the channel map and the interference base actually used by the terminal device (i.e., the first base) has a time delay offset (such as a time delay and power of multiple strong paths), and the useful base used in constructing the channel map and the useful base actually used by the terminal device (i.e., the second base) also has a time delay offset. For example, the interference base used in constructing the channel map has a time delay offset on a power delay profile (PDP) from the interference base used under the current channel of the terminal device. Therefore, the interference base used in constructing the channel map and the interference base used under the current channel of the terminal device need to be time-aligned on the PDP, and if the interference base with time misalignment is used to reconstruct the interference channel, the reconstructed interference channel has a very low correlation with the actual interference channel, thereby affecting the performance of interference cancellation. As shown in FIG. 7A, if the interference base used in constructing the channel map is calculated according to PDP 1, and the terminal device actually uses the interference base to reconstruct the interference signal, because of clock drift, uplink and downlink time delay drift, etc., PDP 2 is measured. As can be seen, there is a time delay offset between PDP 1 and PDP 2, and if the interference base obtained from PDP 1 is directly used to construct the interference channel, the correlation between the constructed interference channel and the actual frequency domain channel corresponding to PDP 2 is only 0.12.

[0141] Therefore, the access network device further needs to send the time delay offset corresponding to the useful base and the time delay offset corresponding to each interference base to the terminal device, so that the terminal device can achieve time alignment when using the interference base to reconstruct the interference signal and when using the useful base to reconstruct the useful signal, and ensure that the reconstructed interference channel has a high correlation with the actual interference channel and the reconstructed useful channel has a high correlation with the actual useful channel.

[0142] As an example, the first delay offset corresponding to the first basis and the second delay offset corresponding to the second basis can also be carried in the first information and be sent to the terminal device together with the first basis and the second basis. The access network device can also send the first delay offset corresponding to the first basis and the second delay offset corresponding to the second basis to the terminal device separately through a signaling. In this way, the sending of the delay offset is more flexible. Of course, the first delay offset corresponding to the first basis and the second delay offset corresponding to the second basis can also be sent in other manners, which are not limited herein.

[0143] In a possible implementation, the first information further indicates one or more of the following information: an identity of the first cell, an identity of a cell where the terminal device is located, a number of the first bases, a type of the first bases, a type of the second bases, a column number of the first bases, or a column number of the second bases. Of course, the first information can also indicate other information, which is not limited herein. In the embodiments of the present application, the access network device further indicates the related information of the first bases (i.e., the bases of the interference signals) and the related information of the second bases (i.e., the bases of the useful signals), which is more conducive to assisting the terminal device to perform interference cancellation.

[0144] Optionally, the type of the first bases or the type of the second bases is any one of the following types: a frequency domain, a spatial domain, a spatial-frequency domain, a spatial-time-frequency domain, a discrete cosine transform (DCT) basis, or a discrete fourier transform (DFT) basis. The spatial-frequency domain refers to the spatial domain and the frequency domain, and the spatial-time-frequency domain refers to the spatial domain, the time domain, and the frequency domain. In the embodiments of the present application, the access network device further specifically describes the type of the signal bases, which is more conducive to assisting the terminal device to perform interference cancellation. Of course, the type of the first bases or the type of the second bases can also be other types of bases, which are not limited herein.

[0145] As an example, the first information can be carried in any of the following information: downlink control information (DCI), medium access control control element (MAC CE), or radio resource control (RRC). Among them, DCI is used to schedule various information of the UE, such as: frequency domain occupied resource block, time domain monitoring position, modulation scheme selection, etc. MAC CE is used to exchange control information. RRC is used to manage and control the allocation and use of wireless resources, to ensure the efficient and stable operation of the network. It should be noted that in the communication system evolved after 5G (such as 6G communication system), DCI can still be called downlink control information, or it can have other names; MAC CE can still be called radio resource control, or it can have other names, which are not limited here; RRC can still be called radio resource control, or it can have other names, which are not limited here.

[0146] Taking DCI (such as the first DCI) as an example, the field shown in Table 1 can be added in the DCI format (the current existing DCI formats include DCI format 0_0, DCI format 0_1, DCI format 1_0, DCI format 1_1, DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCI format 2_4, DCI format 2_5, DCI format 2_6, DCI format 3_0, DCI format 3_1, etc., which are not limited here), and the access network device can send DCI to the terminal device according to the format added with the following fields. As shown in Table 1, taking the first cell as an example, the cell is a neighbor cell, the fields added in the DCI format are:

[0147] (1) The identity of the cell: ID 1 is the identity of the cell where the terminal device is located, ID 2 and ID 3 are both the identity of the first cell (i.e. the identity of the neighbor cell).

[0148] (2) The base corresponding to the cell (i.e. the correspondence between the identity of the cell and the base): the base corresponding to ID 1 is base 1 (i.e. the base of the useful signal of the current cell, i.e. the second base), the base corresponding to ID 2 is base 2 and base 3 (i.e. the base of the interference signal from the base station of the second neighbor cell to the terminal device of the current cell, i.e. the first base), and the base corresponding to ID 3 is base 4 (i.e. the base of the interference signal from the base station of the third neighbor cell to the terminal device of the current cell, i.e. the first base).

[0149] (3) The attribute of the basis: 1 bit is occupied, 1 indicates that the basis is an interference basis, and 0 indicates that the basis is a useful basis. Basis 1 is a useful basis, and basis 2 and basis 3 are interference bases, and basis 4 is an interference basis.

[0150] (4) The number of interference bases (i.e., the first basis): 2 bits are occupied. If the basis is an interference basis, the number of interference bases needs to be further informed. The number of interference bases corresponding to ID 2 is 2, and the number of interference bases corresponding to ID 3 is 1.

[0151] (5) The type of the basis: 3 bits are occupied, and the type of the basis can be a frequency domain, a space domain, a space-frequency, a space-time-frequency, a DCT basis, a DFT basis, etc. The type of basis 1 is a frequency domain, the type of basis 2 and basis 3 is a frequency domain, and the type of basis 4 is a space domain.

[0152] (6) The number of columns of the basis: 5 bits are occupied, and the number of columns of the basis can be considered as the dimension of the basis. The number of columns of basis 1 is 5, the number of columns of basis 2 and basis 3 is 5, and the number of columns of basis 4 is 4.

[0153] Table 1

[0154] In a possible implementation, it is assumed that the first cell is a neighbor cell selected by the terminal device after neighbor cell measurement and satisfying certain conditions, for example, a neighbor cell satisfying event A3. Before the access network device sends the first information to the terminal device, the method further includes steps s11 and s12.

[0155] s11, the terminal device performs measurement on the neighbor cell in the case that the neighbor cell measurement is activated, and obtains a first measurement report; the first measurement report includes an identifier of the first cell.

[0156] s12, the terminal device sends the first measurement report to the access network device. Correspondingly, the access network device receives the first measurement report from the terminal device.

[0157] In a specific implementation, the neighbor cell measurement here can be A3 neighbor cell measurement or other neighbor cell measurement, which is not limited here. The A3 neighbor cell measurement refers to measurement for event A3, and event A3 refers to that a neighbor cell is better than a current serving cell by a relative value, in units of dB.

[0158] Taking the A3 neighbor cell measurement as an example, after the terminal device performs the A3 neighbor cell measurement, the terminal device will report the obtained first measurement report to the access network device, and the first measurement report includes an identifier of the first cell. The first cell here is a neighbor cell satisfying event A3.

[0159] Further, in a possible implementation, before the access network device sends the first information to the terminal device, the access network device needs to obtain a first base of a first signal corresponding to the first cell, a second base of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first base, and a second time delay offset corresponding to the second base. There are two specific implementations as follows:

[0160] Implementation one: For the ORAN architecture, the access network device includes a CU, a DU, a RU, and a SU. The SU in the access network device can be used to construct a channel map, and the first base, the second base, the first time delay offset, and the second time delay offset can be directly obtained from the SU in the access network device. As shown in FIG. 7B, the specific implementation process includes steps s21-s23.

[0161] s21. The SU sends the first base, the second base, the first time delay offset, and the second time delay offset to the CU. Correspondingly, the CU receives the first base, the second base, the first time delay offset, and the second time delay offset from the SU.

[0162] s22. The CU sends the first base, the second base, the first time delay offset, and the second time delay offset to the RU through the DU. Correspondingly, the RU receives the first base, the second base, the first time delay offset, and the second time delay offset from the CU through the DU.

[0163] s23. The RU sends the first information (step s23 is a specific implementation of step S601) to the terminal device, where the first information includes the first base, the second base, the first time delay offset, and the second time delay offset.

[0164] It can be understood that the embodiments of the present application can be applied to the ORAN architecture, and the SU in the access network device can construct a channel map, which can be defined as a database for storing channel characteristics based on location information. In the channel map, the base of the signal corresponding to each cell and the time delay offset corresponding to the base of the signal can be stored. The CU can obtain the required first base, second base, first time delay offset, and second time delay offset from the SU, and then send these information to the RU through the DU, and then send to the terminal device through the RU. In this way, the channel map assisted communication can reduce resource overhead and improve transmission efficiency.

[0165] Implementation two: The access network device can obtain the first base, the second base, the first time delay offset, and the second time delay offset from a map management network element in the core network. As shown in FIG. 6, the specific implementation process includes steps s31 and s32.

[0166] s31, the access network device sends a first request to the graph management network element; the first request is used to request a first base, a second base, a first time delay offset and a second time delay offset. Correspondingly, the graph management network element receives the first request from the access network device.

[0167] The first request includes the identification of the first cell and the identification of the cell where the terminal device is located.

[0168] s32, the graph management network element sends a first response message to the access network device for the first request; the first response message includes the first base, the second base, the first time delay offset and the second time delay offset. Correspondingly, the access network device receives the first response message from the graph management network element for the first request.

[0169] Subsequently, the access network device sends the first information to the terminal device, and the first information includes the first base, the second base, the first time delay offset and the second time delay offset.

[0170] In a specific implementation, the graph management network element is a newly added functional network element in the core network, which can construct a channel graph. The channel graph can be defined as a database for storing channel characteristics based on location information. In the channel graph, the base of the signal corresponding to each cell and the time delay offset corresponding to the base of the signal can be stored. The access network device informs the graph management network element of the identification of the first cell and the identification of the cell where the terminal device is located, and requests the graph management network element to issue the first base, the second base, the first time delay offset and the second time delay offset (i.e. the first request). The graph management network element queries the first base of the first signal corresponding to the first cell, the second base of the second signal corresponding to the cell where the terminal device is located, the first time delay offset corresponding to the first base and the second time delay offset corresponding to the second base in the channel graph according to the location of the first cell and the location of the cell where the terminal device is located, and issues them to the access network device through the first response message for the first request. In this way, the channel graph assisted communication mode can reduce resource overhead and improve transmission efficiency.

[0171] In addition, for the ORAN architecture, the specific implementation process of steps s31, s32 and S601 is: the CU sends a first request to the graph management network element, and correspondingly, the graph management network element receives the first request from the CU. The graph management network element sends a first response message to the CU for the first request, and correspondingly, the CU receives the first response message from the graph management network element for the first request. The CU sends the first base, the second base, the first time delay offset and the second time delay offset to the RU through the DU; the RU sends the first information to the terminal device, and the first information includes the first base, the second base, the first time delay offset and the second time delay offset.

[0172] Further, in a possible implementation, before the terminal device performs interference cancellation on the second signal based on the first information, as shown in FIG. 6, the method further includes steps s41-s43.

[0173] s41, the access network device sends a second request to the first cell; the second request is used to request the downlink transmission sequence parameter of the first cell. Correspondingly, the first cell receives the second request from the access network device.

[0174] The downlink transmission sequence parameter is used to estimate the interference signal.

[0175] s42, the first cell sends a second response message for the second request to the access network device; the second response message includes the downlink transmission sequence parameter of the first cell. Correspondingly, the access network device receives the second response message for the second request from the first cell.

[0176] s43, the access network device sends second information to the terminal device; the second information includes the downlink transmission sequence parameter of the first cell. Correspondingly, the terminal device receives the second information from the access network device.

[0177] As an example, the second information can be carried in any of the following information: DCI, MAC CE or RRC. Among them, DCI is used to schedule various information of UE, such as: resource block of frequency domain occupation, position of time domain monitoring, selection of modulation scheme, etc. MAC CE is used to exchange control information. RRC is used to manage and control the allocation and use of wireless resources, to ensure the efficient and stable operation of the network. It should be noted that in the communication system after 5G (such as 6G communication system), DCI can still be the name of downlink control information, or it can have other names; MAC CE can still be the name of radio resource control, or it can have other names, which are not limited here; RRC can still be the name of radio resource control, or it can have other names, which are not limited here.

[0178] As an example, the second information further includes the number of the first cell. Of course, other information can also be included in the second information, which is not limited here.

[0179] In a specific implementation, the access network device can inquire the downlink transmission sequence parameter (which can be a downlink transmission sequence parameter set, such as a scrambling code ID set) of the first cell through the Xn interface. The first cell replies to the access network device through the base station, and carries the downlink transmission sequence parameter of the first cell in the second response message for the second request. After the access network device obtains the downlink transmission sequence parameter of the first cell, the access network device can carry the downlink transmission sequence parameter of the first cell in the second information and send it to the terminal device. The terminal device can use the received downlink transmission sequence parameter of the first cell to estimate the interference signal. It should be noted that the access network device and the base station of the first cell do not need to cooperate and do not need to know the real-time scheduling information of the first cell. Only the scrambling code ID sequence set of the first cell needs to be notified to the terminal. In this way, the terminal device can more accurately estimate the interference signal.

[0180] For example, the second information is carried in the DCI (second DCI). A log2(X) bit can be added in the DCI format, where X represents the number of first cells (i.e., the number of adjacent cells). An x bit can also be added in the DCI format to inform the downlink transmission sequence parameter of the first cell (i.e., the sequence parameter transmitted by the adjacent cell (such as the scrambling code sequence of the channel state information-reference signal (CSI-RS) sequence)).

[0181] In addition, for the ORAN architecture, the specific implementation process of steps s41-s43 is: the CU sends a second request to the first cell, and correspondingly, the first cell receives the first request from the CU; the first cell sends a second response message for the second request to the CU, and the second response message includes the downlink transmission sequence parameter of the first cell, and correspondingly, the CU receives the second response message for the second request from the first cell; the CU sends second information to the RU through the DU; and the RU sends the second information to the terminal device, and the second information includes the downlink transmission sequence parameter of the first cell.

[0182] S602, the terminal device performs interference cancellation on the second signal based on the first information.

[0183] In the embodiments of the present application, the terminal device filters the estimated first signal and second signal according to the first base of the first signal corresponding to the first cell, the second base of the second signal corresponding to the cell where the terminal device is located, the first time delay offset corresponding to the first base, the second time delay offset corresponding to the second base and other information in the first information issued by the access network device, to obtain more accurate first signal and second signal, and to improve the correlation between the recovered channel and the ideal channel. The first signal can be considered as the interference signal of the first cell to the cell where the terminal device is located, and the second signal can be considered as the useful signal of the cell where the terminal device is located. Since the first signal exists in the second signal, the first signal can be further used to cancel the interference of the second signal, which is beneficial to improve the performance and efficiency of interference cancellation.

[0184] As an example, if the access network device issues the downlink transmission sequence parameter of the first cell to the terminal device, the terminal device can estimate the first signal corresponding to the first cell according to the downlink transmission sequence parameter of the first cell, and filter the estimated first signal by using the first base in the first information, to reconstruct a more accurate first signal (i.e. interference signal). Further, the terminal device can estimate the second signal according to the received reference signal, and filter the estimated second signal by using the second base in the first information, to obtain a more accurate second signal (i.e. useful signal). Finally, the reconstructed first signal is removed from the second signal, to realize interference cancellation of the second signal.

[0185] As another example, if the access network device does not issue the downlink transmission sequence parameter of the first cell to the terminal device, the terminal device can first estimate the second signal according to the received reference signal, and filter the estimated second signal by using the second base in the first information, to obtain a more accurate second signal (i.e. useful signal). Then, the determined second signal is projected into the complementary space of the first base of the first signal corresponding to the first cell, to realize interference cancellation.

[0186] Of course, other ways can also be used to cancel the interference of the second signal by using the first information, which is not limited herein.

[0187] It can be seen that, based on the method described in FIG. 6, the access network device can send the terminal device information such as the first base of the first signal corresponding to the first cell (i.e., the interference cell), the second base of the second signal corresponding to the cell where the terminal device is located, the first time delay offset corresponding to the first base, and the second time delay offset corresponding to the second base, in a certain format. The first signal can be considered as an interference signal generated by the first cell to the cell where the terminal device is located, the second signal can be considered as a useful signal for data transmission of the cell where the terminal device is located, and the first signal exists in the second signal. The terminal device can use the information sent by the access network device to filter the estimated first signal and second signal, obtain more accurate first signal and second signal, and improve the correlation between the recovered channel and the ideal channel. Since the first signal exists in the second signal, the first signal can be further used to realize interference cancellation of the second signal, which is beneficial to improve the performance and efficiency of interference cancellation.

[0188] FIG. 8 is a flow diagram of another information processing method provided by an embodiment of the present application. As shown in FIG. 8, the information processing method includes the following steps S801 and S802. Optionally, the information processing method further includes the following steps s51 and s52. Optionally, the information processing method further includes the following steps s61 and s62. The method execution subject shown in FIG. 8 can be the access network device and the terminal device mentioned above. Alternatively, the method execution subject shown in FIG. 8 can be a chip in the access network device and a chip in the terminal device, which is not limited in the embodiments of the present application. FIG. 8 takes the access network device and the terminal device as the execution subject of the method as an example for description. The graph management network element can be a separate device in the core network, or its functions can be integrated into the access network device, which is not limited herein.

[0189] S801, the access network device sends first information to the terminal device, the first information indicating a first base of a first signal corresponding to a first cell, a second base of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first base, and a second time delay offset corresponding to the second base. Correspondingly, the terminal device receives the first information from the access network device.

[0190] In the embodiments of the present application, there is interference between the first cell and the cell where the terminal device is located. The first cell can also be referred to as an interference cell. For example, the first cell can be a neighboring cell (or a neighboring area, i.e., a neighboring cell) of the cell where the terminal device is located, or other cells that cause interference to the cell where the terminal device is located, which is not limited herein. The first cell can be one or more.

[0191] The first cell here can be a neighbor cell selected by the terminal device after neighbor cell measurement and meeting certain conditions, for example, a neighbor cell meeting Event A3 (Event A3), where Event A3 refers to a neighbor cell becoming offset better than a current serving cell by a relative value (neighbour becomes offset better than SpCell), in units of dB; can also be an interference cell whose interference strength reaches a preset threshold after measurement; or can be all cells causing interference to the cell where the terminal device is located, without limitation.

[0192] The first signal corresponding to the first cell can also be referred to as interference base of the first cell, and the second signal corresponding to the cell where the terminal device is located can also be referred to as useful base of the cell where the terminal device is located.

[0193] Taking the first cell as a neighbor cell of the cell where the terminal device is located as an example, the access network device can obtain the identifiers of all neighbor cells of the cell where the terminal device is located from the NRCellRelation information, which is information for storing the relationship between cells; then, the first base of the first signal corresponding to all neighbor cells (i.e., all first cells), the second base of the second signal corresponding to the cell where the terminal device is located, the first time delay offset corresponding to the first base, and the second time delay offset corresponding to the second base are sent to the terminal device.

[0194] As an example, the first time delay offset corresponding to the first base and the second time delay offset corresponding to the second base issued by the access network device can also be carried in the first information and issued to the terminal device together with the first base and the second base. The access network device can also separately issue the first time delay offset corresponding to the first base and the second time delay offset corresponding to the second base to the terminal device through a signaling, which can make the issuance of the time delay offset more flexible. Of course, other ways can also be used to issue the first time delay offset corresponding to the first base and the second time delay offset corresponding to the second base, without limitation.

[0195] In a possible implementation, the first information further indicates one or more of the following: an identity of the first cell, an identity of the cell where the terminal device is located, a number of the first basis, a type of the first basis, a type of the second basis, a number of columns of the first basis, or a number of columns of the second basis. Of course, the first information can also indicate other information, which is not limited herein. In the embodiments of the present application, the access network device further indicates the related information of the first basis (i.e., the basis of the interference signal) and the related information of the second basis (i.e., the basis of the useful signal), which is more conducive to assisting the terminal device to perform interference cancellation.

[0196] Optionally, the type of the first basis or the type of the second basis is any one of the following types: a frequency domain, a spatial domain, a space-frequency, a space-time-frequency, a DCT basis, or a DFT basis.

[0197] As an example, the first information can be carried in any one of the following: DCI, MAC CE, or RRC.

[0198] It should be noted that the specific description of the first basis of the first signal corresponding to the first cell, the second basis of the second signal corresponding to the cell where the terminal device is located, the first delay offset corresponding to the first basis, and the second delay offset corresponding to the second basis can refer to the description in the above step S601, which is not repeated here.

[0199] In a possible implementation, before the access network device sends the first information to the terminal device, the access network device needs to obtain the first basis of the first signal corresponding to the first cell, the second basis of the second signal corresponding to the cell where the terminal device is located, the first delay offset corresponding to the first basis, and the second delay offset corresponding to the second basis. There are two specific implementations as follows:

[0200] Method 1: For an ORAN architecture, the access network device includes a CU, a DU, a RU, and a SU. The SU in the access network device can be used to construct a channel map, and the first basis, the second basis, the first delay offset, and the second delay offset can be directly obtained from the SU in the access network device. As shown in FIG. 7B, the specific implementation process includes steps s21-s23.

[0201] The specific implementation process of steps s21-s23 can refer to the specific implementation process of steps s21-s23 in the above case one, which is not repeated here.

[0202] Method 2: The access network device can obtain the first basis, the second basis, the first delay offset, and the second delay offset from a graph management network element in the core network. As shown in FIG. 8, the specific implementation process includes steps s61 and s62.

[0203] s61, the access network device sends a first request to a graph management network element; the first request is used to request a first base, a second base, a first time delay offset and a second time delay offset. Correspondingly, the graph management network element receives the first request from the access network device.

[0204] The first request includes the identification of the first cell and the identification of the cell where the terminal device is located.

[0205] s62, the graph management network element sends a first response message to the access network device for the first request; the first response message includes the base of the interference signal corresponding to the first cell and the time delay offset corresponding to the base of the interference signal. Correspondingly, the access network device receives the first response message from the graph management network element for the first request.

[0206] The specific implementation process of steps s61 and s62 can refer to the specific implementation process of steps s31 and s32 in the above case one, which will not be repeated here.

[0207] In a possible implementation, assuming that the first cell here is all the cells having a neighboring relationship with the cell where the terminal device is located. Then, after the access network device sends the first information to the terminal device, before the terminal device performs interference cancellation on the second signal based on the first information, the method can further include step s51.

[0208] s51, the terminal device measures the neighboring cell to obtain a second measurement report when the neighboring cell measurement is activated; the second measurement report includes the identification of the second cell.

[0209] In a specific implementation, the second cell is a cell in the first cell that satisfies a first condition. Here, the cell satisfying the first condition can be a neighboring cell satisfying event A3, or a neighboring cell satisfying other conditions. In summary, the second cell is a neighboring cell selected from all neighboring cells (i.e. all first cells).

[0210] After the terminal device receives the first information, taking A3 neighboring cell measurement as an example, the terminal device performs A3 measurement on the neighboring cell to obtain a second measurement report when the A3 neighboring cell measurement is activated; the second measurement report includes the identification of the second cell, which is a neighboring cell satisfying event A3 selected from all first cells.

[0211] S802, the terminal device performs interference cancellation on the second signal based on the first information.

[0212] In the embodiments of the present application, the terminal device filters the estimated first signal and second signal according to the first base of the first signal corresponding to the first cell in the first information issued by the access network device, the second base of the second signal corresponding to the cell in which the terminal device is located, the first time delay offset corresponding to the first base, the second time delay offset corresponding to the second base, and the like, to obtain more accurate first signal and second signal, and to improve the correlation between the recovered channel and the ideal channel. The first signal can be considered as the interference signal of the first cell to the cell in which the terminal device is located, and the second signal can be considered as the useful signal of the cell in which the terminal device is located. Since the first signal exists in the second signal, the first signal can be further used to realize interference cancellation of the second signal, which is beneficial to improve the performance and efficiency of interference cancellation.

[0213] As an example, after the terminal device obtains the second measurement report, the specific implementation manner can be step s52: the terminal device performs interference cancellation on the useful signal based on the first information and the second measurement report.

[0214] It can be understood that, if the terminal device performs measurement on the neighbor cell in the case that neighbor cell measurement is activated, and obtains the identity of the second cell in the second measurement report, the terminal device can screen the first base of the first signal corresponding to the second cell (i.e. the interference base) from the first information; the terminal device can first estimate the second signal according to the received reference signal, and filter the estimated second signal by using the second base in the first information to obtain more accurate second signal (i.e. useful signal); and then project the determined second signal into the supplementary space of the interference base corresponding to the second cell for interference cancellation.

[0215] As another example, if the terminal device does not perform neighbor cell measurement, the terminal device does not need to further screen the base, and can directly estimate the second signal according to the received reference signal, and filter the estimated second signal by using the second base in the first information to obtain more accurate second signal (i.e. useful signal); and then project the determined second signal into the supplementary space of the interference base corresponding to the second cell for interference cancellation.

[0216] It can be seen that, based on the method described in FIG. 8, the access network device can send the terminal device information such as the first base of the first signal corresponding to the first cell (i.e., the interference cell), the second base of the second signal corresponding to the cell where the terminal device is located, the first time delay offset corresponding to the first base, and the second time delay offset corresponding to the second base, in a certain format. The first signal can be considered as an interference signal generated by the first cell to the cell where the terminal device is located, the second signal can be considered as a useful signal for data transmission of the cell where the terminal device is located, and the first signal exists in the second signal. The terminal device can use the information sent by the access network device to filter the estimated first signal and second signal, obtain more accurate first signal and second signal, and improve the correlation between the recovered channel and the ideal channel. Since the first signal exists in the second signal, the first signal can be further used to realize interference cancellation of the second signal, which is beneficial to improving the performance and efficiency of interference cancellation.

[0217] The apparatus provided by the embodiments of the present application will be described below.

[0218] The present application divides the functions of the apparatus according to the above-mentioned method embodiments, for example, each function module can be divided according to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated module can be realized in the form of hardware or in the form of a software function module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical function division. In actual implementation, another division mode can be used. The apparatus of the embodiments of the present application will be described in detail below with reference to FIGS. 9 to 11.

[0219] FIG. 9 is a structural schematic diagram of a communication apparatus provided by an embodiment of the present application. As shown in FIG. 9, the communication apparatus includes a processing module 901 and a transceiver module 902. The transceiver module 902 can realize corresponding communication functions, and the processing module 901 is used to realize corresponding processing functions. For example, the transceiver module 902 can also be referred to as an interface, a communication interface, or a communication module, etc.

[0220] In some embodiments of the present application, the communication apparatus can be used to perform the actions performed by the terminal device in the above-mentioned method embodiments. At this time, the communication apparatus can be the terminal device itself or a chip or a function module configured in the terminal device, etc. The transceiver module 902 is used to perform the transceiving related operations of the terminal device in the above-mentioned method embodiments, and the processing module 901 is used to perform the processing related operations of the terminal device in the above-mentioned method embodiments.

[0221] Exemplarily, the transceiver module 902 can be configured to receive first information from the access network device; the first information indicates a first basis of a first signal corresponding to a first cell, a second basis of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first basis, and a second time delay offset corresponding to the second basis; there is interference between the first cell and the cell where the terminal device is located, the first time delay offset is a time interval between when the first basis is used in constructing a channel map and when the first basis is used, and the second time delay offset is a time interval between when the second basis is used in constructing the channel map and when the second basis is used.

[0222] The processing module 901 can be configured to perform interference cancellation on the second signal based on the first information.

[0223] As an example, the first information further indicates one or more of the following information: an identity of the first cell, an identity of the cell where the terminal device is located, a number of the first basis, a type of the first basis, a type of the second basis, a number of columns of the first basis, or a number of columns of the second basis.

[0224] As another example, the type of the first basis or the type of the second basis is any one of the following types: a frequency domain, a space domain, a space-frequency domain, a space-time-frequency domain, a DCT basis, or a DFT basis.

[0225] Exemplarily, before performing interference cancellation on the useful signal based on the first information, the transceiver module 902 can further be configured to receive second information from the access network device; the second information includes a downlink transmission sequence parameter of the first cell, and the downlink transmission sequence parameter is used to estimate an interference signal.

[0226] As another example, the second information further includes a number of the first cell.

[0227] As another example, the first information or the second information is carried in any one of the following information: DCI, MAC CE, or RRC.

[0228] Exemplarily, the transceiver module 902 can include a radio frequency module, an antenna module, etc. Exemplarily, the transceiver module 902 can include a pin module, etc.

[0229] In another embodiment of the present application, the communication device can be configured to perform the actions performed by the access network device in the above method embodiments. At this time, the communication device can be the access network device itself or a chip or functional module configured in the access network device, etc. The transceiver module 902 is configured to perform the transceiving-related operations of the access network device in the above method embodiments, and the processing module 901 is configured to perform the processing-related operations of the access network device in the above method embodiments.

[0230] Exemplarily, the transceiver 902 can be configured to send first information to the terminal device, the first information indicating a first basis of a first signal corresponding to a first cell, a second basis of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first basis, and a second time delay offset corresponding to the second basis, and there is interference between the first cell and the cell where the terminal device is located, the first time delay offset being a time interval between a time when the first basis is used in constructing a channel map and a time when the first basis is used, and the second time delay offset being a time interval between a time when the second basis is used in constructing the channel map and a time when the second basis is used.

[0231] As an example, the first information further indicates one or more of the following information: an identity of the first cell, an identity of the cell where the terminal device is located, a number of the first basis, a type of the first basis, a type of the second basis, a number of columns of the first basis, or a number of columns of the second basis.

[0232] As another example, the type of the first basis or the type of the second basis is any one of the following types: a frequency domain, a spatial domain, a space-frequency domain, a space-time-frequency domain, a DCT basis, or a DFT basis.

[0233] Exemplarily, before sending the first information to the terminal device, the transceiver 902 can be further configured to send a first request to a map management network element, the first request being used to request the first basis, the second basis, the first time delay offset, and the second time delay offset, the first request including an identity of the first cell and an identity of the cell where the terminal device is located, the map management network element being used to construct a channel map, receive a first response message from the map management network element and in response to the first request, the first response message including the first basis, the second basis, the first time delay offset, and the second time delay offset.

[0234] Exemplarily, the transceiver 902 can be further configured to send a second request to the first cell, the second request being used to request a downlink transmission sequence parameter of the first cell, the downlink transmission sequence parameter being used to estimate an interference signal, receive a second response message from the first cell and in response to the second request, the second response message including the downlink transmission sequence parameter of the first cell, and send second information to the terminal device, the second information including the downlink transmission sequence parameter of the first cell.

[0235] As an example, the second information further includes a number of the first cell.

[0236] As another example, the first information or the second information is carried in any one of the following information: DCI, MAC CE, or RRC.

[0237] Exemplarily, the transceiver module 902 can include a radio frequency module, an antenna module, etc. Exemplarily, the transceiver module 902 can include a pin module, etc.

[0238] In another embodiment of the application, the communication apparatus can be configured to implement the actions performed by the graph management network element in the above method embodiments. In this case, the communication apparatus can be the graph management network element itself or a chip or functional module configured in the graph management network element, etc. The transceiver module 902 is configured to perform the transceiving related operations of the graph management network element in the above method embodiments, and the processing module 901 is configured to perform the processing related operations of the graph management network element in the above method embodiments.

[0239] Exemplarily, the transceiver module 902 can be configured to receive a first request from an access network device; the first request is used to request a first base of a first signal corresponding to a first cell, a second base of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first base, and a second time delay offset corresponding to the second base; the first request includes an identifier of the first cell and an identifier of the cell where the terminal device is located, there is interference between the first cell and the cell where the terminal device is located, the first time delay offset is a time interval between when the first base is used in the construction of a channel graph and when the first base is used, and the second time delay offset is a time interval between when the second base is used in the construction of the channel graph and when the second base is used.

[0240] The transceiver module 902 can also be configured to send a first response message to the access network device in response to the first request; the first response message includes the first base, the second base, the first time delay offset, and the second time delay offset.

[0241] Exemplarily, the transceiver module 902 can include a radio frequency module, an antenna module, etc. Exemplarily, the transceiver module 902 can include a pin module, etc.

[0242] Optionally, in each of the above embodiments, the communication apparatus can further include a storage module, which can be configured to store instructions and / or data, and the processing module 901 can read the instructions and / or data in the storage module to enable the apparatus to implement the foregoing method embodiments. Exemplarily, the storage module can also store the channel graph, the first base of the first signal corresponding to the first cell, the second base of the second signal corresponding to the cell where the terminal device is located, the first time delay offset corresponding to the first base, the second time delay offset corresponding to the second base, etc. shown above.

[0243] In the above embodiments, the specific descriptions of the terms or steps such as useful signal, interference signal, base of interference signal, base of useful signal, base of interference signal, time delay offset corresponding to the base of interference signal, interference cancellation, and the like in each sub-block can refer to the descriptions in the method embodiments, and will not be repeated here.

[0244] The specific descriptions of the transceiver module and the processing module in the above embodiments are only examples. For the specific functions or executed steps of the transceiver module and the processing module, refer to the method embodiments, and will not be repeated here.

[0245] The device of the embodiments of the present application is introduced above, and possible product forms of the device are introduced below. Any product in any form that has the functions of the device described in FIG. 9 falls within the protection scope of the embodiments of the present application. The following introduction is only an example, and does not limit the product form of the device of the embodiments of the present application.

[0246] In a possible implementation, in the communication device shown in FIG. 9, the processing module 901 can be one or more processing circuits, and the transceiver module 902 can be a transceiver circuit, or the transceiver module 902 can also be a sending module and a receiving module, the sending module can be a sending circuit, and the receiving module can be a receiving circuit, and the sending module and the receiving module are integrated in one device, for example, a transceiver circuit. In the embodiments of the present application, the processing circuit and the transceiver circuit can be coupled, and the connection mode of the processing circuit and the transceiver circuit is not limited in the embodiments of the present application. In the process of executing the above method, the process of sending information in the above method can be the process of outputting the above information by the processing circuit. When the above information is output, the processing circuit outputs the above information to the transceiver circuit, so as to be transmitted (or output) by the transceiver circuit. After the above information is output by the processing circuit, it can also need to be processed further, and then reaches the transceiver circuit. Similarly, the process of receiving information in the above method can be the process of receiving the input above information by the processing circuit. When the processing circuit receives the input information, the transceiver circuit receives the above information and inputs it to the processing circuit. Further, after the transceiver circuit receives the above information, the above information can need to be processed further, and then input to the processing circuit.

[0247] FIG. 10 is a structural schematic diagram of a communication device provided by the embodiments of the present application. As shown in FIG. 10, the communication device 100 includes one or more processing circuits 1020 and a transceiver circuit 1010.

[0248] In some embodiments of the application, the communication device can be configured to perform the steps or methods or functions performed by the terminal device as described above, e.g., the processing circuitry 1020 can be configured to perform the functions or steps implemented by the processing module 901 as illustrated in FIG. 9, and the transceiver circuitry 1010 can be configured to perform the functions or steps implemented by the transceiving module 902 as illustrated in FIG. 9. For specific description of the processing circuitry 1020 and the transceiver circuitry 1010, reference can be made to FIG. 9 or the method embodiments described above, which will not be repeated here.

[0249] In some embodiments of the application, the communication device can be configured to perform the steps or methods or functions performed by the terminal device as described above, e.g., the processing circuitry 1020 can be configured to perform the functions or steps implemented by the processing module 901 as illustrated in FIG. 9, and the transceiver circuitry 1010 can be configured to perform the functions or steps implemented by the transceiving module 902 as illustrated in FIG. 9. For specific description of the processing circuitry 1020 and the transceiver circuitry 1010, reference can be made to FIG. 9 or the method embodiments described above, which will not be repeated here.

[0250] In some embodiments of the application, the communication device can be configured to perform the steps or methods or functions performed by the terminal device as described above, e.g., the processing circuitry 1020 can be configured to perform the functions or steps implemented by the processing module 901 as illustrated in FIG. 9, and the transceiver circuitry 1010 can be configured to perform the functions or steps implemented by the transceiving module 902 as illustrated in FIG. 9. For specific description of the processing circuitry 1020 and the transceiver circuitry 1010, reference can be made to FIG. 9 or the method embodiments described above, which will not be repeated here.

[0251] By way of example, the processing circuitry can be one or more processors, or all or part of one or more processors. The transceiver circuitry can be a transceiver, or input / output circuitry, or interface circuitry, etc.

[0252] By way of example, in each of the various implementations of the apparatus illustrated in FIG. 10, the transceiver circuitry can include a receiver configured to perform the functions (or operations) of receiving, and a transmitter configured to perform the functions (or operations) of transmitting. And the transceiver circuitry is configured to communicate with other devices / apparatuses via transmission medium.

[0253] Optionally, the communication device 100 can further include one or more memories 1030 for storing program instructions and / or data. The memory 1030 is coupled to the processing circuit 1020. The coupling between the various elements in the embodiments of the present application can be indirect coupling or communication connection between the devices, units or modules, which can be electrical, mechanical or other form, for information interaction between the devices, units or modules. The processing circuit 1020 can operate in cooperation with the memory 1030. The processing circuit 1020 can execute the program instructions stored in the memory 1030. Optionally, at least one of the one or more memories described above can be included in the processing circuit.

[0254] The specific connection medium between the transceiver circuit 1010, the processing circuit 1020 and the memory 1030 in the embodiments of the present application is not limited. In FIG. 10, the memory 1030, the processing circuit 1020 and the transceiver circuit 1010 are connected by a bus 1040, which is represented by a thick line in FIG. 10, and the connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is used in FIG. 10, but it does not mean that there is only one bus or only one type of bus.

[0255] In the embodiments of the present application, the processing circuit can be a general-purpose processing circuit, a digital signal processing circuit, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general-purpose processing circuit can be a micro-processing circuit or any conventional processing circuit, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as execution completed by a hardware processing circuit, or executed by a combination of hardware and software modules in the processing circuit, etc.

[0256] The memory in the embodiments of the present application can include, but is not limited to, a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), a random access memory (RAM), an erasable programmable ROM (EPROM), a read-only memory (ROM), a compact disc read-only memory (CD-ROM), and the like. The memory is any storage medium that can be used to carry or store program codes in the form of instructions or data structures and can be read and / or written by a computer (such as the device shown in the present application and the like). The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, used for storing program instructions and / or data.

[0257] For example, the processing circuit 1020 is mainly used for processing communication protocols and communication data, and controlling the whole device, executing software programs, and processing data of the software programs. The memory 1030 is mainly used for storing software programs and data. The transceiver circuit 1010 can include a control circuit and an antenna, and the control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The input and output device, such as a touch screen, a display screen, a keyboard, and the like, is mainly used for receiving user input data and outputting data to the user.

[0258] When the device is powered on, the processing circuit 1020 can read the software program in the memory 1030, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processing circuit 1020 performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit converts the baseband signal into a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processing circuit 1020. The processing circuit 1020 converts the baseband signal into data and processes the data.

[0259] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processing circuit for baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the device.

[0260] The apparatus shown in the embodiments of the present application can also have more components than those shown in FIG. 10, and the embodiments of the present application do not limit this. The method performed by the processing circuit and the transceiver circuit shown above is only an example, and the specific steps performed by the processing circuit and the transceiver circuit can refer to the method described above.

[0261] In another possible implementation, in the apparatus shown in FIG. 9, the processing module 901 can be one or more logic circuits, and the transceiving module 902 can be an input / output interface, also referred to as a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiving module 902 can also be a sending module and a receiving module, the sending module can be an output interface, and the receiving module can be an input interface, and the sending module and the receiving module are integrated into one module, for example, an input / output interface.

[0262] FIG. 11 is a structural schematic diagram of a communication apparatus provided by an embodiment of the present application. As shown in FIG. 11, the communication apparatus shown in FIG. 11 includes a logic circuit 1101 and an interface circuit 1102. That is, the processing module 901 can be implemented by the logic circuit 1101, and the transceiving module 902 can be implemented by the interface circuit 1102. The logic circuit 1101 can be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, etc., and the interface circuit 1102 can be a communication interface, an input / output interface, a pin, etc. For example, FIG. 11 is shown by taking the communication apparatus as a chip, and the chip includes the logic circuit 1101 and the interface circuit 1102.

[0263] In the embodiments of the present application, the logic circuit and the interface can also be coupled to each other. The embodiments of the present application do not limit the specific connection mode of the logic circuit and the interface. For example, the logic circuit 1101 can be used to perform the functions or steps implemented by the processing module 901 shown in FIG. 9, and the interface circuit 1102 can be used to perform the functions or steps implemented by the transceiving module 902 shown in FIG. 9. For specific descriptions of the logic circuit 1101 and the interface circuit 1102, refer to the method embodiments shown in FIG. 9 or the above description, which will not be described in detail here.

[0264] The apparatus shown in the embodiments of the present application can implement the method provided by the embodiments of the present application in the form of hardware, or implement the method provided by the embodiments of the present application in the form of software, etc., and the embodiments of the present application do not limit this.

[0265] The embodiments of the present application also provide a communication system, which includes a terminal device, an access network device, and a graph management network element, and the terminal device, the access network device, and the graph management network element can be used to perform the method in any of the preceding embodiments.

[0266] In addition, the present application also provides a computer program for implementing the operations and / or processes performed by each device in the method provided by the present application.

[0267] The present application also provides a computer readable storage medium having computer code stored therein, which, when executed on a computer, causes the computer to perform the operations and / or processes performed by each device in the method provided by the present application.

[0268] The present application also provides a computer program product comprising computer code or a computer program, which, when executed on a computer, causes the operations and / or processes performed by each device in the method provided by the present application to be performed.

[0269] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some interfaces, devices or modules, and can also be electrical, mechanical or other form of connection.

[0270] The modules described as separate components can or can not be physically separated, and the components shown as modules can or can not be physical modules, that is, they can be located in one place, or can be distributed to multiple network modules. According to actual needs, part or all of the modules can be selected to achieve the technical effects of the scheme provided by the embodiments of the present application.

[0271] In addition, each functional module in each embodiment of the present application can be integrated in one processing module, or each module can exist physically, or two or more modules can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of software functional module.

[0272] The integrated module, if implemented in the form of a software function module and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in various embodiments of the present application. The aforementioned readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0273] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An information processing method characterized by comprising: The method applied to a terminal device comprises: receiving first information from an access network device; the first information indicating a first basis of a first signal corresponding to a first cell, a second basis of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first basis, and a second time delay offset corresponding to the second basis; there is interference between the first cell and the cell where the terminal device is located, the first time delay offset being a time interval between when the first basis is used in channel map construction and when the first basis is used, and the second time delay offset being a time interval between when the second basis is used in channel map construction and when the second basis is used; performing interference cancellation on the second signal based on the first information.

2. The method of claim 1, wherein, The first information further indicates one or more of the following information: an identifier of the first cell, an identifier of the cell where the terminal device is located, a number of the first basis, a type of the first basis, a type of the second basis, a number of columns of the first basis, or a number of columns of the second basis.

3. The method of claim 2, wherein, The type of the first basis or the type of the second basis is any one of the following types: frequency domain, space domain, space-frequency, space-time-frequency, discrete cosine transform (DCT) basis, or discrete Fourier transform (DFT) basis.

4. The method according to any one of claims 1 to 3, characterized in that, The receiving first information from the access network device comprises: receiving the first information from a radio unit (RU) in the access network device.

5. The method according to any one of claims 1-4, characterized in that, Before the performing interference cancellation on the second signal based on the first information, the method further comprises: receiving second information from the access network device; the second information comprising downlink transmission sequence parameters of the first cell, the downlink transmission sequence parameters being used for estimating an interference signal.

6. The method of claim 5, wherein, The second information further comprises a number of the first cell.

7. The method according to claim 5 or 6, characterized in that, The receiving second information from the access network device comprises: receiving the second information from the RU in the access network device.

8. The method according to any one of claims 1-7, characterized in that, The first information or the second information is carried in any one of the following information: downlink control information (DCI), a medium access control control element (MAC CE), or radio resource control (RRC).

9. An information processing method characterized by comprising: The method applied to an access network device comprises: sending first information to a terminal device; the first information indicating a first basis of a first signal corresponding to a first cell, a second basis of a second signal corresponding to a cell where the terminal device is located, a first time delay offset corresponding to the first basis, and a second time delay offset corresponding to the second basis; there is interference between the first cell and the cell where the terminal device is located, the first time delay offset being a time interval between when the first basis is used in channel map construction and when the first basis is used, and the second time delay offset being a time interval between when the second basis is used in channel map construction and when the second basis is used.

10. The method of claim 7, wherein, The first information further indicates one or more of the following information: an identifier of the first cell, an identifier of the cell where the terminal device is located, a number of the first basis, a type of the first basis, a type of the second basis, a number of columns of the first basis, or a number of columns of the second basis.

11. The method of claim 8, wherein, The type of the basis of the interference signal or the type of the basis of the useful signal is any one of the following types: frequency domain, space domain, space-frequency, space-time-frequency, discrete cosine transform (DCT) basis, or discrete Fourier transform (DFT) basis.

12. The method according to any one of claims 9-11, characterized in that, The access network device comprises a radio unit (RU); and the sending of the first information to the terminal device comprises: The RU sends the first information to the terminal device.

13. The method of claim 12, wherein, The access network device further comprises a service unit (SU), a centralized unit (CU), and a distributed unit (DU); Before the sending of the first information to the terminal device, the method further comprises: The SU sends the first basis, the second basis, the first time delay offset, and the second time delay offset to the CU; The SU is configured to construct a channel map; The CU sends the first basis, the second basis, the first time delay offset, and the second time delay offset to the RU through the DU.

14. The method according to any one of claims 9-12, characterized in that, Before the sending of the first information to the terminal device, the method further comprises: sending a first request to a map management network element, the first request being used to request the first basis, the second basis, the first time delay offset, and the second time delay offset, the first request comprising an identifier of the first cell and an identifier of a cell in which the terminal device is located, the map management network element being configured to construct a channel map; receiving a first response message from the map management network element in response to the first request, the first response message comprising the first basis, the second basis, the first time delay offset, and the second time delay offset.

15. The method of claim 14, wherein, The access network device comprises a CU, a DU, and an RU; The sending of the first request to the map management network element comprises: The CU sends the first request to the map management network element; The receiving of the first response message from the map management network element in response to the first request comprises: The CU receives the first response message from the map management network element in response to the first request; The method further comprises: The CU sends the first basis, the second basis, the first time delay offset, and the second time delay offset to the RU through the DU.

16. The method according to any one of claims 9-15, characterized in that, The method further comprises: sending a second request to the first cell, the second request being used to request downlink transmission sequence parameters of the first cell, the downlink transmission sequence parameters being used to estimate an interference signal; receiving a second response message from the first cell in response to the second request, the second response message comprising the downlink transmission sequence parameters of the first cell; sending second information to the terminal device, the second information comprising the downlink transmission sequence parameters of the first cell.

17. The method of claim 16, wherein, The second information further comprises a number of the first cells.

18. The method of claim 16 or 17, wherein, The access network device comprises a CU, a DU, and an RU; The sending of the second request to the first cell comprises: The CU sends the second request to the first cell; The receiving of the second response message from the first cell in response to the second request comprises: The CU receives the second response message from the first cell in response to the second request; The sending of the second information to the terminal device comprises: The CU sends second information to the RU through the DU; The RU sends the second information to the terminal device.

19. The method according to any one of claims 9-18, characterized by, The first information or the second information is carried in any of the following information: downlink control information (DCI), a medium access control control element (MAC CE), or a radio resource control (RRC).

20. An information processing method characterized by comprising: The method is applied to a graph management network element configured to construct a channel graph, and the method comprises: receiving a first request from an access network device; the first request is used to request a first base of a first signal corresponding to a first cell, a second base of a second signal corresponding to a cell where a terminal device is located, a first time delay offset corresponding to the first base, and a second time delay offset corresponding to the second base; the first request comprises an identifier of the first cell and an identifier of the cell where the terminal device is located, there is interference between the first cell and the cell where the terminal device is located, the first time delay offset is a time interval between the first base when the channel graph is constructed and the first base when the first base is used, and the second time delay offset is a time interval between the second base when the channel graph is constructed and the second base when the second base is used; sending a first response message for the first request to the access network device; the first response message comprises the first base, the second base, the first time delay offset, and the second time delay offset.

21. The method of claim 20, wherein, The receiving a first request from an access network device comprises: receiving a first request from a centralized unit (CU) in the access network device; The sending a first response message for the first request to the access network device comprises: sending a first response message for the first request to the CU in the access network device.

22. A communications device, characterized by The computer readable storage medium is configured to store a computer program, and the computer program is configured to be executed to perform the method in any one of claims 1-8, or to perform the method in any one of claims 9-19, or to perform the method in claim 20 or 21.

23. A communications device, characterized by The computer readable storage medium is configured to store a computer program, and the computer program is configured to be executed to perform the method in any one of claims 1-8, or to perform the method in any one of claims 9-19, or to perform the method in claim 20 or 21.

24. A chip, characterized by The computer readable storage medium is configured to store a computer program, and the computer program is configured to be executed to perform the method in any one of claims 1-8, or to perform the method in any one of claims 9-19, or to perform the method in claim 20 or 21.

25. A computer-readable storage medium, characterized in that, The computer readable storage medium is configured to store a computer program, and the computer program is configured to be executed to perform the method in any one of claims 1-8, or to perform the method in any one of claims 9-19, or to perform the method in claim 20 or 21.

26. A computer program product, characterised in that, The computer program product, when executed, performs the method of any of claims 1-8, or the method of any of claims 9-19, or the method of claim 20 or 21.

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