CN113950071A

CN113950071A - Communication method and device

Info

Publication number: CN113950071A
Application number: CN202010683187.5A
Authority: CN
Inventors: 余雅威; 郭志恒
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2022-01-18
Also published as: WO2022012396A1

Abstract

The application provides a communication method and device, and relates to the technical field of communication. The method and the device can solve the problem that when the terminal equipment receives signals of one communication system, the terminal equipment is interfered by another communication system. The method includes the terminal device receiving first information from a first system. Wherein the first information is used for indicating the parameter configuration of the reference signal of the second system. The first system employs a first radio access technology and the second system employs a second radio access technology, the first radio access technology being different from the second radio access technology. And the terminal equipment eliminates the interference of the signal from the second system from the received signal according to the parameter configuration of the reference signal of the second system.

Description

Communication method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a communication method and device.

Background

With the continuous development and evolution of wireless communication technologies, wireless spectrum resources are beginning to become more and more scarce. In order to fully utilize the radio spectrum resources, multiple systems using different radio access technologies are usually deployed in the same frequency band. For example, currently, a system that respectively adopts a Long Term Evolution (LTE) Radio access technology and a system that respectively adopts a 5G New Radio (5G NR) Radio access technology may be deployed simultaneously in a frequency band below 6 GHz.

Therefore, in the case where multiple systems are deployed in the same frequency band at the same time, the reference signal transmitted by the cell of one system may cause interference to other communication systems.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which are used for solving the problem that when terminal equipment receives a signal of one communication system, the terminal equipment is interfered by a reference signal from another communication system.

In order to achieve the above purpose, the embodiments of the present application provide the following technical solutions:

in a first aspect, a communication method is provided, and includes: the terminal device receives first information from a first system. Wherein the first information is used for indicating the parameter configuration of the reference signal of the second system. The first system employs a first radio access technology and the second system employs a second radio access technology, the first radio access technology being different from the second radio access technology.

Based on the technical scheme, the network device in the first system sends the first information for indicating the parameter configuration of the reference signal of the second system to the terminal device, so that the terminal device can determine the parameter configuration of the reference signal of the second system. Therefore, the terminal equipment can obtain the reference signal of the second system according to the parameter configuration of the reference signal of the second system, and the possibility of reducing the interference of the reference signal to the received signal of the first system is provided. For example, the terminal device may suppress interference from the reference signal of the second system from the received signal by reconstructing the reference signal of the second system according to the parameter configuration of the reference signal of the second system.

In one possible design, before the terminal device receives the first information from the network device of the first system, when the channel quality of the downlink signal is lower than a preset threshold, the terminal device sends the second information to the network device. The second information is used for indicating the terminal equipment to the network equipment that the network equipment needs to send the first information. Based on the above design, the network device of the first system may send the first information to the terminal device after receiving the second information, and the terminal device does not need to send the second information to the network device of the first system and the network device does not need to send the first information to the terminal device under the condition that the terminal device is less interfered (i.e., the channel quality of the terminal device is better), thereby reducing the occupation of the air interface resources.

In one possible design, before the terminal device receives the first information from the network device of the first system, the method may further include: and the terminal equipment sends third information to the network equipment of the first system. The third information is used for indicating the number of interference signals processed by the terminal device to the network device of the first system, and the interference signals are reference signals of the second system. Based on the above design, the network device may determine the parameter configuration for transmitting several reference signals in the second system to the terminal device according to the number of interference signals processed by the terminal device indicated by the third information.

In one implementation, the third information is specifically used to indicate the number of interference signals that the terminal device can handle at maximum. For example, the terminal device may determine, according to its own processing capability, that the terminal device can maximally reduce interference from reference signals of N second systems, that is, the number of interference signals that the terminal device can maximally process is N; the terminal device then sends third information indicating the number N to the network device. In this way, the network device can determine that the terminal device can process the N interference signals at maximum, and then send parameter configuration of the reference signals of the second system to the terminal device, the number of which is matched with the processing capability of the terminal device. For example, after determining that the terminal device can process N interference signals at maximum, the network device sends N parameter configurations of reference signals of the second system to the terminal device; for another example, after determining that the terminal device can process N interference signals at maximum, the network device sends, to the terminal device, a parameter configuration of reference signals smaller than N second systems.

In another implementation, the third information is specifically used for indicating the number of interference signals that the terminal device needs to process. For example, the terminal device may determine, according to information such as channel quality of a current downlink channel, the number M of reference signals of the second system that interfere with the terminal device, that is, determine that the number of interference signals that the terminal device needs to process is M. The terminal device then sends third information indicating the number M to the network device. Therefore, the network equipment can determine that the terminal equipment needs to process the M interference signals, and then send the parameter configuration of the reference signals of the second system, the number of which is matched with the number of the terminal equipment needs, to the terminal equipment.

In one possible design, the terminal device receives first information from a network device of a first system, including: the terminal device receives first Radio Resource Control (RRC) signaling from a network device of a first system. The first RRC signaling includes first information for indicating configuration information of a reference signal of the second system.

In one possible design, before the terminal device performs interference suppression on the interference signal from the second system in the received signal according to the parameter configuration of the reference signal of the second system indicated by the first RRC signaling, the method may further include: the terminal device receives first Downlink Control Information (DCI) from the network device. The first DCI is used for indicating the terminal equipment to activate parameter configuration, and the terminal can activate the DCI sent by the network equipment to perform interference suppression when the interference suppression is required through the semi-static scheduling, so that the downlink receiving demodulation performance is improved; when interference suppression is not needed, the DCI sent by the network equipment can be used for deactivation, interference suppression is not performed any more, and energy consumption caused by interference suppression is reduced.

In one possible design, the receiving, by the terminal device, the first information from the network device of the first system may include: the terminal device receives second DCI from the network device of the first system. The second DCI includes the first information. By carrying the first information on the second DCI for transmission, the network device can send different first information required for interference suppression to the terminal device in real time.

In one possible design, the parameter configuration includes a first parameter configuration and a second parameter configuration. The terminal device receiving first information from a network device of a first system may include: the terminal equipment receives second RRC signaling and third DCI from network equipment of the first system, wherein the second RRC signaling comprises information used for indicating first parameter configuration; the third DCI includes information indicating the second parameter configuration. In the design, information that the change frequency is slow or the occupied overhead is large in parameter configuration can be used as first parameter configuration and is carried in an RRC signaling for sending; and taking the information with fast change frequency or small occupied overhead in the parameter configuration as a second parameter configuration, and carrying the second parameter configuration on the DCI signaling for sending. The advantage of small DCI transmission delay can be utilized to ensure the quick transmission of the information with small occupation overhead or quick change frequency in the parameter configuration; and the excessive DCI overhead can be avoided.

In a possible design, the parameter configuration may include time-frequency position indication information of the reference signal and indication information of a reference signal generation parameter. For example, the parameter configuration described above includes one or more of the following parameters: the Physical Cell Identity (PCI) of a second cell in the second system, a subframe number offset value corresponding to a cell specific reference signal (CRS), the number of antenna ports, the system bandwidth, the position of a central subcarrier, the type of a cyclic prefix and the time-frequency position of a multicast/multicast single-frequency network (MBSFN) subframe. Based on the above design, the terminal device may reconstruct the CRS of the second cell by using the parameters in the parameter configuration, thereby implementing interference cancellation on the CRS of the second cell, and achieving an effect of performing interference suppression on a signal from the first system.

In one possible design, the first radio access technology is an LTE technology, and the second radio access technology is a 5G NR technology. Based on the above design, the terminal device can suppress interference of a signal from the LTE system when receiving the signal from the 5GNR system.

In a second aspect, a communication method is provided, including: the network device of the first system sends the first information to the terminal device. Wherein the first information is used for indicating the parameter configuration of the reference signal of the second system. The first system employs a first radio access technology and the second system employs a second radio access technology, the first radio access technology being different from the second radio access technology.

Based on the technical scheme, the network device in the first system sends the first information for indicating the parameter configuration of the reference signal of the second system to the terminal device, so that the terminal device can determine the parameter configuration of the reference signal of the second system. In this way, the terminal device can suppress interference generated by the reference signal of the second system when receiving the signal from the first system by reconstructing the reference signal of the second system and the like according to the parameter configuration of the reference signal of the second system.

In one possible design, the method further includes: the network device receives the second information from the terminal device. The second information is used for indicating the terminal equipment to the network equipment that the network equipment needs to send the first information. Based on the design, the network device can send the first information to the terminal device after receiving the second information, and the terminal device does not need to send the second information to the network device of the first system and the network device does not need to send the first information to the terminal device under the condition that the terminal device is less interfered (namely the channel quality of the terminal device is better), so that the occupation of the air interface resources is reduced.

In one possible design, before the network device of the first system sends the first information to the terminal device, the method further includes: the network equipment receives third information from the terminal equipment; the third information is used for indicating the number of interference signals processed by the terminal equipment to the network equipment of the first system, wherein the interference signals are reference signals of the second system. Based on the above design, the network device may determine the parameter configuration for transmitting several reference signals in the second system to the terminal device according to the number of interference signals processed by the terminal device indicated by the third information.

In one possible design, the sending, by the network device of the first system, the first information to the terminal device includes: the network equipment of the first system sends a first Radio Resource Control (RRC) signaling to the terminal equipment. The first RRC signaling includes first information used for indicating configuration information of a reference signal of the second system to the terminal device.

In one possible design, the method further includes: the network equipment sends first downlink control information DCI to the terminal equipment. The first DCI is used for indicating the terminal equipment to activate parameter configuration, and the terminal can activate the DCI sent by the network equipment to perform interference suppression when the interference suppression is required through the semi-static scheduling, so that the downlink receiving demodulation performance is improved; when interference suppression is not needed, the DCI sent by the network equipment can be used for deactivation, interference suppression is not performed any more, and energy consumption caused by interference suppression is reduced.

In one possible design, the sending, by the network device of the first system, the first information to the terminal device includes: and the network equipment of the first system sends the second DCI to the terminal equipment. And the second DCI comprises the first information. By carrying the first information on the second DCI for transmission, the network device can send different first information required for interference suppression to the terminal device in real time.

In one possible design, the parameter configuration includes a first parameter configuration and a second parameter configuration. The method for sending the first information to the terminal equipment by the network equipment of the first system comprises the following steps: and the network equipment of the first system sends the second RRC signaling and the third DCI to the terminal equipment. Wherein the second RRC signaling comprises information for indicating the first parameter configuration; the third DCI includes information indicating the second parameter configuration. In the design, information that the change frequency is slow or the occupied overhead is large in parameter configuration can be used as first parameter configuration and is carried in an RRC signaling for sending; and taking the information with fast change frequency or small occupied overhead in the parameter configuration as a second parameter configuration, and carrying the second parameter configuration on the DCI signaling for sending. The advantage of small DCI transmission delay can be utilized to ensure the quick transmission of the information with small occupation overhead or quick change frequency in the parameter configuration; and the excessive DCI overhead can be avoided.

In one possible design, the parameter configuration includes time-frequency location indication information of the reference signal and indication information of a reference signal generation parameter. For example, the parameter configuration described above includes one or more of the following parameters: the Physical Cell Identity (PCI) of a second cell in the second system, a subframe number offset value corresponding to a cell specific reference signal (CRS), the number of antenna ports, the system bandwidth, the position of a central subcarrier, the type of a cyclic prefix and the time-frequency position of a multicast/multicast single-frequency network (MBSFN) subframe. Based on the above design, the terminal device may reconstruct the CRS of the second cell by using the parameters in the parameter configuration, thereby implementing interference cancellation on the CRS of the second cell, and achieving an effect of performing interference suppression on a signal from the first system.

In one possible design, the first radio access technology is long term evolution, LTE, technology. The second radio access technology is a 5G new air interface 5G NR technology. Based on the above design, the terminal device can suppress interference of a signal from the LTE system when receiving the signal from the 5G NR system.

In a third aspect, a communication apparatus is provided, which may be a chip or a system on a chip of a terminal device. The communication means may implement the functions performed by the terminal device in the first aspect or possible designs in the first aspect. These functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. Such as: the communication apparatus may include: the receiving unit is used for realizing the relevant functions of the terminal equipment. Illustratively, the receiving unit may be configured to receive first information from a network device of the first system. Wherein the first information is used for indicating the parameter configuration of the reference signal of the second system; the first system employs a first radio access technology and the second system employs a second radio access technology, the first radio access technology being different from the second radio access technology. Of course, more or fewer units may be included in the communication apparatus for implementing other functions of the terminal device.

In a fourth aspect, a communication apparatus is provided, which may be a chip or a system on a chip of a network device. The communication means may implement the functions performed by the network device in the second aspect or possible designs of the second aspect. These functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. Such as: the communication apparatus may include: the sending unit is used for realizing the related functions of the network equipment. Illustratively, the sending unit may be configured to send the first information to the terminal device. Wherein the first information is used for indicating the parameter configuration of the reference signal of the second system. The first system employs a first radio access technology and the second system employs a second radio access technology, the first radio access technology being different from the second radio access technology. Of course, more or fewer units may be included in the communication apparatus to implement other functions of the network device.

In a fifth aspect, a communications apparatus is provided that includes one or more processors coupled with one or more memories. The one or more memories store computer instructions. The computer instructions, when executed by the one or more processors, cause the communication apparatus to perform a communication method performed by the terminal device in the possible design of the first aspect or the first aspect, or the computer instructions, when executed by the one or more processors, cause the communication apparatus to perform a communication method performed by the network device in the possible design of the second aspect or the second aspect.

A sixth aspect provides a computer-readable storage medium, in which instructions are stored, which, when executed, perform a communication method performed by a terminal device in the above first aspect or possible design of the first aspect, or which, when executed, perform a communication method performed by a network device in the above second aspect or possible design of the second aspect.

A seventh aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the communication method performed by the terminal device in the first aspect or possible designs thereof, or cause the computer to perform the communication method performed by the network device in the second aspect or possible designs thereof.

In an eighth aspect, a chip system is provided, which includes a processor, and a communication interface, and is configured to support a communication device to implement the functions recited in the above aspects. In one possible design, the system-on-chip further includes a memory, which stores program instructions and data necessary for the network device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

Exemplarily, any design manner of the third aspect to the eighth aspect may correspond to the first aspect and any possible design thereof or the second aspect and any possible design thereof, and therefore, similar technical effects can be brought, and are not described herein again.

Drawings

Fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 2 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 3 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 4 is a second schematic diagram of a communication system according to an embodiment of the present application;

fig. 5 is a schematic diagram illustrating that a CRS occupies REs in a subframe;

fig. 6 is a second flowchart of a communication method according to an embodiment of the present application;

fig. 7 is a third schematic flowchart of a communication method according to an embodiment of the present application;

fig. 8 is a fourth flowchart illustrating a communication method according to an embodiment of the present application;

fig. 9 is a fifth flowchart illustrating a communication method according to an embodiment of the present application;

fig. 10 is a schematic diagram illustrating a communication device according to an embodiment of the present application;

fig. 11 is a second schematic diagram illustrating a communication device according to an embodiment of the present application;

fig. 12 is a third schematic diagram illustrating a communication device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. For convenience of clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items with substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance. Also, in the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or illustrations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion for ease of understanding.

In addition, the network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and it can be known by a person skilled in the art that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

To facilitate an understanding of the present application, the related art to which the present application relates will now be described.

A Reference Signal (RS), also called a pilot Signal, is a known Signal provided by a transmitting end to a receiving end for channel estimation or channel exploration. In mobile communication technology, common reference signals include: cell-specific Reference Signal (CRS), Channel State Information Reference Signal (CRI-RS), and the like. The various reference signals have corresponding functions, and the time-frequency positions and the contents of the various reference signals also have corresponding generation rules.

Taking the CRS as an example, the CRS of one cell is valid for all terminal devices in the cell. The role of CRS includes: (1) for performing Channel estimation on a Physical Downlink Shared Channel (PDSCH); (2) for enabling the terminal device to acquire Channel State Information (CSI); (3) CRS-based terminal measurements may be used to assist cell selection and handover.

The communication method provided by the embodiment of the application can be applied to various communication systems, for example, communication systems adopting 5GNR technology, LTE technology or other wireless access technologies.

Fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application. Wherein, can include in this network: a terminal device, a Radio Access Network (RAN) or AN access communication network (AN) (RAN and AN are collectively referred to as (R) AN), and a Core Network (CN).

The terminal device may be a device with a wireless transceiving function. The terminal equipment may be referred to by different names, such as User Equipment (UE), access equipment, terminal unit, terminal station, mobile station, remote terminal, mobile equipment, wireless communication equipment, terminal agent, or terminal device. The terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device comprises a handheld device, a vehicle-mounted device, a wearable device or a computing device with wireless communication function. For example, the terminal device may be a mobile phone (mobile phone), a tablet computer, or a computer with wireless transceiving function. The terminal device may also be a Virtual Reality (VR) device, an Augmented Reality (AR) device, an industrial control terminal, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. In this embodiment of the present application, the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, such as a chip system. In the present application, the chip system may have a chip configuration, and may also include a chip and other discrete devices.

The (R) AN mainly comprises access network equipment. The access network equipment may also be referred to as a base station. The base station may include various forms of base stations. For example: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, etc. The method specifically comprises the following steps: the Base Station may be an Access Point (AP) in a Wireless Local Area Network (WLAN), a Base Transceiver Station (BTS) in a Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA), an evolved node B (evolved node B, eNB, or eNodeB) in LTE, or a relay Station or access point, or a vehicle-mounted device, a wearable device, and a Base Station in a next generation node B (next generation node B, gbb) in a 5G Network or a future evolved Public Land Mobile Network (PLMN) Network.

A base station generally includes a Base Band Unit (BBU), a Radio Remote Unit (RRU), an antenna, and a feeder for connecting the RRU and the antenna. Wherein, the BBU is used for being responsible for signal modulation. The RRU is responsible for radio frequency processing. The antenna is responsible for the conversion between guided waves on the cable and space waves in the air. On one hand, the length of a feeder line between the RRU and the antenna is greatly shortened by the distributed base station, so that the signal loss can be reduced, and the cost of the feeder line can also be reduced. On the other hand, the RRU and the antenna are smaller, so that the RRU can be installed anywhere, and the network planning is more flexible. Besides RRU remote, BBUs can be centralized and placed in a Central Office (CO), and the centralized mode can greatly reduce the number of base station rooms, reduce the energy consumption of supporting equipment, particularly air conditioners, and reduce a large amount of carbon emission. In addition, after the scattered BBUs are collected and become the BBU baseband pool, unified management and scheduling can be realized, and resource allocation is more flexible. In this mode, all physical base stations evolve into virtual base stations. All virtual base stations share information of data receiving and sending, channel quality and the like of users in a BBU baseband pool, and cooperate with each other to realize joint scheduling. In some deployments, a base station may include a Centralized Unit (CU) and a Distributed Unit (DU). The base station may also include an Active Antenna Unit (AAU). The CU realizes part of the functions of the base station and the DU realizes part of the functions of the base station. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of a Radio Resource Control (RRC) layer and a Packet Data Convergence Protocol (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC), a Media Access Control (MAC), and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as RRC layer signaling or PDCP layer signaling, can also be considered to be sent by the DU or from the DU + AAU under this architecture. It is understood that in the embodiment of the present application, the access network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, a CU may be divided into network devices in the RAN, and may also be divided into network devices in a Core Network (CN), which is not limited herein.

The core network includes a plurality of core network elements (alternatively referred to as network function network elements), for example, in fig. 1, the core network in a fifth Generation mobile communication technology (5th-Generation, 5G) system includes: an AMF network element, a Session Management Function (SMF) network element, a PCF network element, a User Plane Function (UPF) network element, an application layer function (application function) network element, an AUSF network element, and a UDM network element.

In addition, the core network may also include some network elements not shown in fig. 1, such as: a security anchor function (SEAF) network element, an authentication credential repository, and an authentication authorization and processing function (ARPF), which are not described herein in detail in the embodiments of the present application.

Fig. 2 is a schematic diagram of a communication system according to an embodiment of the present application. Wherein the communication system comprises at least a first system employing a first radio access technology and a second system employing a second radio access technology.

The first radio access technology and the second radio access technology are respectively different technologies in the LTE technology, the 5G NR technology, and the like. In addition, the radio access technology described in the present application may be a new radio access technology that appears along with the development of the radio communication technology, and the present application is not limited thereto.

In a first system employing a first radio access technology, comprising: network device 101 and terminal device 102. The terminal device 102 may communicate with the network device 101 in an area a covered by a first cell corresponding to the network device 101. In addition, in the second system adopting the second radio access technology, the network device 103 and the terminal device 104 are included. The terminal device 104 may communicate with the network device 103 in an area b covered by a second cell corresponding to the network device 103.

The network device 101 may be AN access network device in (R) AN in fig. 2, for example, the network device 101 may be a gNB in a 5G NR system. The network device 103 may be AN access network device in AN (R) AN of a communication system employing a different radio access technology than the first system, e.g. the network device 103 may be AN access network device in AN LTE system, a WCDMA system, a GSM system, or a CDMA system.

It should be noted that the example shown in fig. 2 is exemplified by the network devices not co-located in the system using different radio access technologies. In some other embodiments, the network devices in the first system and the second system may be co-located, that is, the communication system may include only one network device, and the network device may provide access service not only for the terminal device in the first system using the first radio access technology, but also for the terminal device in the second system using the second radio access technology. The following embodiments take the example that access network devices in systems adopting different radio access technologies do not share a station, and describe the embodiments in detail.

In fig. 2, when there is an overlapping area (e.g., area c in fig. 2) in the coverage areas of the first cell and the second cell, and there is a shared resource in the frequency band resources used by the first cell and the second cell, the terminal device 102 may be interfered by the reference signal in the second system when receiving the downlink signal from the first system in the area c. For example, when the first system is a 5GNR system and the second system is an LTE system, the terminal apparatus 102 may be interfered by a reference signal such as a cell-specific reference signal and a channel state information reference signal from the network apparatus 103 in the LTE system.

In order to solve the problem that terminal equipment is interfered by reference signals from adjacent cells in the same frequency band in the process of receiving downlink signals from network equipment, a method for eliminating interference by the terminal equipment in an NR system is provided in the related art. In the method, the LTE terminal equipment acquires the parameter configuration of the reference signal of the adjacent cell by acquiring the contents of the broadcast information, the synchronization signal and the like of the adjacent cell, and then reconstructs the reference signal of the adjacent cell. Then, the NR terminal device suppresses interference of a neighboring cell reference signal existing in a downlink signal of the serving cell received in an interference cancellation manner, thereby improving the performance of downlink transmission.

For example, the NR terminal device obtains synchronization information of the neighboring cell through the synchronization signal, and further obtains a frame number and a subframe number of the CRS; the NR terminal equipment obtains the number of antenna ports of the adjacent region by reading the broadcast information of the adjacent region; the NR terminal device obtains configuration information such as a Multicast/Multicast Single frequency network (MBSFN) of the neighboring cell by reading Broadcast information of the neighboring cell, and obtains a subframe number of an MBSFN subframe. Then, the LTE terminal device can reconstruct the CRS of the neighboring cell by the parameter configuration, and further realize interference suppression by interference cancellation.

Although the method can suppress and eliminate the interference of the reference signal in the neighboring cell in the NR system, when the interference is from a communication system of a different system, for example, the interference is from an LTE system, since it is difficult for the terminal device to directly acquire the broadcast information and the synchronization signal in the neighboring cell, the parameter configuration of the relevant reference signal cannot be acquired in the above manner, and thus the interference suppression cannot be completed.

Taking the communication system shown in fig. 2 as an example, since the terminal device 102 cannot directly acquire the broadcast information and the synchronization signal sent by the network device 103, it cannot acquire the parameter configuration of the reference signal. Thus, interference suppression cannot be performed.

For the above technical problem, in this embodiment of the present application, the network device 101 may first obtain parameter configuration (including a time-frequency position for indicating a reference signal and a parameter for generating a signal sequence) of a reference signal of a second cell corresponding to the network device 103; the above parameter configuration is then sent by the network device 101 to the terminal device 102. In this way, the terminal device 102 may use the parameter configurations to reconstruct the reference signal of the second cell, and then perform interference suppression.

The following describes a communication method provided in the embodiment of the present application with reference to the communication system shown in fig. 2, and as shown in fig. 3, the method may include the following contents S201 to S202:

s201, the network device 101 of the first system sends first information to the terminal device 102.

Wherein the first information is used for indicating the parameter configuration of the reference signal of the second system. The parameter configuration of the reference signal may include: the time-frequency position indication information of the reference signal and the indication information of the reference signal generation parameter. And the time-frequency position indication information is used for indicating the time-domain position and the frequency-domain position of the reference signal. And indication information of the reference signal generation parameter is used for indicating the sequence content of the reference signal.

In one embodiment, the first system and the second system referred to in this application may be understood as two different radio access technologies. That is, the network device of the first system may be understood as a network device that provides access service to the terminal device by using one radio access technology (which may be referred to as a first radio access technology); the network device of the second system may be understood as a network device that provides an access service to the terminal device using another radio access technology (which may be referred to as a second radio access technology). The first radio access technology and the second radio access technology may be different technologies in LTE technology, 5G NR technology, and the like. In addition, the radio access technology described in the present application may be a new radio access technology that appears along with the development of the radio communication technology, and the present application is not limited thereto. In addition, the reference signal of the second system may be understood as a reference signal used when the network device provides an access service to the terminal device by using the second radio access technology. For example, when the first radio access technology is a 5G NR technology and the second radio access technology is an LTE technology, the Reference Signal of the second system may include a CRS, a CRI-RS, or a Demodulation Reference Signal (DMRS) used by an LTE cell.

Considering that in a communication system, different cells typically correspond to different reference signals, the terminal device 102 may be interfered by reference signals from one cell of the second system or may be simultaneously interfered by reference signals from multiple cells of the second system. As in fig. 2, the terminal device 102 is subject to interference from a second cell C1 in the second system. For another example, in fig. 4, when the terminal device 102 is located in an overlapping area of the first cell (i.e., the cell corresponding to the network device 101 in the first system), the second cell C1 (the cell corresponding to the network device 103 in the second system), and the second cell C2 (the cell corresponding to the network device 105 in the second system), the terminal device 102 may be simultaneously interfered by the reference signals of the two cells, i.e., the second cell C1 and the second cell C2. Therefore, the parameter configuration of the reference signal of the second system may be specifically used to indicate the parameter configuration of the reference signal of one or more second cells in the second system.

In addition, when the network device 101 is an access network device, the network device 101 may obtain parameter configuration of reference signals of other communication systems (i.e., the second system) except the first system by accessing an operation and maintenance administration (OAM) network element or an upper management network element. For a specific method for acquiring the parameter configuration of the reference signal of the second system by the network device 101, reference may be made to related contents in the prior art, which is not described in detail in this application.

In another embodiment, the first system and the second system may also be two access network subsystems in a communication system using the same radio access technology. Taking the 5GNR system as an example, the first system includes a network device of a cell a in the 5G NR system and a terminal device accessing the cell a, and the second system includes a network device of a cell B in the 5G NR system and a terminal device accessing the cell B.

In the case where the first system and the second system are two subsystems in a communication system using the same radio access technology, in this embodiment, since the terminal device can determine the parameter configuration of the reference signal of the second system, such as the reference signal of the cell a in the 5GNR system, by using the first information, the terminal device can suppress the interference of the reference signal of the second system on the received signal of the first system according to the parameter configuration, for example, the terminal device can suppress the interference of the reference signal of the cell a in the 5G NR system on the received signal of the cell B in the 5G NR system according to the parameter configuration.

The following embodiments take the first system and the second system using different radio access technologies as an example, and describe the embodiments in detail. It should be noted that, in some embodiments, as described above, the first system and the second system may also be two subsystems in a communication system using the same radio access technology, and the application may not be limited thereto.

In an example, the reference signal of the second system may be a CRS of a second cell in the second system. Further, the parameter configuration may specifically include one or more of the following parameters: a Primary Cell ID (PCI) of the second cell in the second system, a subframe number offset value corresponding to the CRS of the second cell, an antenna port number of the second cell, a system bandwidth of the second cell, and a cyclic prefix (cyclic prefix) type of the second cell. Through the implementation manner, the terminal device 102 may determine the time-frequency position of the CRS of the second cell and the content of the CRS sequence by using the parameters included in the parameter configuration, so as to reduce and eliminate interference of the CRS of the second cell on the received signal of the first system by reconstructing the CRS of the second cell.

The subframe number offset value may specifically include a slot (slot) number of a CRS in a subframe, a symbol (symbol) number in the slot, and the like. The system bandwidth may include one of 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, and 6 values, and the number of the corresponding maximum Physical RB (PRB) is 6/15/25/50/75/100.

In addition, considering that in communication systems employing different radio access technologies, the extent of PRBs may be different, e.g., the starting position of resource blocks and the size of the scheduled bandwidth may be different. Therefore, in order to ensure that the terminal device 102 can determine the location of the CRS of the second cell in the second system, the parameter configuration may further include: the center subcarrier location.

For example, in a specific implementation, the first information may include the number of target subcarriers. After receiving the first information, the terminal device 102 uses the offset function to increase the number of target subcarriers based on the current starting position of subcarriers to determine the position of the center subcarrier in the second system.

In addition, considering that no CRS is present in the MBSFN subframe, interference suppression on CRS may not be required at the time-frequency position corresponding to the MBSFN subframe. Therefore, the parameter configuration may further include: and the time-frequency position of the multicast/multicast single frequency network MBSFN subframe of the second cell.

In another example, the reference signal of the second system may be a DMRS of a second cell in the second system. Further, the parameter configuration may specifically include one or more of the following parameters: a coiling ID (scrambling ID) of a DMRS of a second Cell, a slot position of the DMRS in a frame, a time domain symbol position in the slot, a Code Division Multiplexing (CDM) grouping type of the second Cell, a physical Cell ID of the second Cell, and a DMRS sequence initialization value {0/1 }; the PRB frequency domain starting position scheduled by the second cell and the PRB number scheduled by the second cell.

S202, the terminal device 102 receives the first information from the network device 101.

Since the first information indicates the parameter configuration of the reference signal of the second system, the terminal device 102 may reduce the interference of the reference signal with the received signal of the first system by using the parameter configuration of the reference signal indicated by the first information.

Thus, in one implementation, the method may further comprise:

s203, the terminal device 102 reduces interference of the reference signal to the received signal of the first system according to the parameter configuration of the reference signal of the second system indicated by the first information.

After the terminal device 102 acquires the first information, the reference signal of the second system may be obtained by reconstructing the reference signal of the second system according to the parameter configuration indicated by the first information. Interference control is then performed with respect to the reference signal of the second system. For example, interference from the reference signal of the second system may be reduced from the received signal by interference reduction, so as to achieve the effect of suppressing interference to obtain the received signal from the first system.

In an example, a detailed procedure of performing interference suppression on the terminal device 102 is described below by taking a signal that interferes with the terminal device 102 as a CRS of a second cell in the second system as an example:

the first step is as follows: the terminal device 102 may determine, according to the parameter configuration (including the PCI of the second cell, the subframe number offset value corresponding to the CRS of the second cell, the system bandwidth, and the type of the cyclic prefix) indicated by the first information, the content of the CRS sequence carried by the CRS of the second cell.

Specifically, a CRS sequence carried in the CRS is composed of a series of reference symbols, where each reference symbol occupies one Resource Element (RE), and a generation manner of the sequence is shown in formula one:

wherein n is_sIndicates the slot number of the frame in which the CRS reference symbol is located, l indicates the symbol number in the slot,

represents a subframe n_sThe value of CRS reference symbols in the above symbol l. In addition, the first and second substrates are,

(ii) represents the number of maximum physical RBs for downlink scheduling of the cell

May be derived from the system bandwidth).

In addition, in the formula one, c is a pseudo random sequence, and is defined by a set of Gold sequences (Gold sequence) with the length of 31. Wherein the output length of the sequence c is represented as M_PN. When n is 0,1_PNWhen the sequence c is-1, the value of the sequence c meets the following condition:

c(n)＝(x₁(n+3)+x₂(n+N_c))mod2

x₁(n+31)＝(x₁(n+3)+x₁(n))mod2

x₂(n+31)＝(x₂(n+3)+x₂(n+2)+x₂(n+1)+x₂(n))mod2。

wherein N is_c1600, sequence x₁The initial values of (a) are:

sequence x₂Is expressed as:

wherein,

the number of the main cell of the current cell is represented, and the value of the number is 0-503. N is a radical of_cpIndicates the type of cyclic prefix of the cell, and when the cyclic prefix employs a normal cyclic prefix (normal CP), N _cp1 is ═ 1; when the cyclic prefix employs an extended cyclic prefix (extendedCP), N_cp＝0。

Therefore, according to the PCI of the second cell, the subframe number offset value corresponding to the CRS of the second cell, the system bandwidth, and the type of the cyclic prefix, the content of each reference symbol in the CRS sequence carried in the CRS of the second cell can be obtained.

The second step is that: and the time-frequency position of the CRS can be determined according to the parameters such as the number of antenna ports, the PCI, the position of the central subcarrier, the time-frequency position of the MBSFN subframe and the like of the second cell. Exemplarily, as shown in fig. 5, the structure of a subframe after a CRS is mapped to an RE on the subframe is illustrated. Wherein, CRS of antenna port 0 and antenna port 1 occupy 4 REs in each slot (in this example, one slot includes 7 time domain symbols), and occupy 8 REs in one slot pair; when more than three antenna ports are supported, in order to avoid excessive overhead occupied by the CRS, the number of REs occupied by the CRS of the antenna port 2 and the antenna port 3 is reduced, that is, the CRS of the antenna port 2 and the antenna port 3 occupy 2 REs in each slot.

The third step: after determining the content and the time-frequency position carried by the CRS of the second cell, the terminal device 102 may reconstruct the CRS of the second cell. Then, the CRS of the second cell is suppressed when the signal from the first system is received by using an interference cancellation mode, so that the effect of suppressing the interference of the signal from the first system is realized.

In another example, the following describes a detailed procedure of interference suppression for the terminal device 102 by taking a signal that interferes with the terminal device 102 as a DMRS of a second cell in a second system:

the first step is as follows: the terminal device 102 may determine, according to the parameter configuration indicated by the first information, the content of the DMRS sequence carried by the DMRS of the second cell.

Specifically, the DMRS sequence carried in the DMRS is composed of a series of reference symbols, where each reference symbol occupies one RE, and the generation manner of the sequence is shown in formula two:

where r (n) denotes a value of a DMRS reference symbol in an nth PRB.

Wherein, r (n) in the formula two is a pseudo random sequence, and the initialization of the sequence r (n) is completed by the following formula three:

where l is the number of symbols in the slot (which may be determined by the time domain symbol position in the slot),

is the number of slots in a frame (determined by the slot position of the DMRS in a frame).

In addition, if the PDSCH is scheduled by DCI format 1_1 or 1_2 and scrambled by C-RNTI, MCS-C-RNTI or CS-RNTI, the higher layer parameter PDSCH-Config ═ is>DMRS-DownlinkConfig＝>scramblingID0 and scramblingID1 configure

And

and

is (0, 1.., 65535);

if the PDSCH is scheduled by the DCI format 1_0 and scrambled by the C-RNTI, MCS-C-RNTI or CS-RNTI, then

The value of (a) is determined by the high-level parameter scramblingID 0;

in the case where the higher layer parameters are not configured,

a physical cell ID configured as a serving cell;

can be determined using the following equation four:

λ may be determined by CDM packet type;

the value range of (1, 0), if the PDSCH is scheduled by DCI format 1_1, the value is given by field DMRS sequence initiation in DCI, otherwise, the value is directly 0.

The second step is that: and determining the time-frequency position of the DMRS.

The third step: after determining the content and the time-frequency position carried by the DMRS of the second cell, the terminal device 102 may reconstruct the DMRS of the second cell. And then, by means of interference reduction, the DMRS of the second cell is suppressed when the signal from the first system is received, so that the effect of interference reduction on the signal from the first system is achieved.

In an implementation manner, in order to reduce occupation of air interface resources, in this embodiment of the application, the terminal device 102 may further detect channel quality of downlink transmission in the network environment, and after the terminal device 102 determines that the channel quality of the currently received downlink signal is relatively poor, the terminal device 102 sends information (hereinafter referred to as second information) to the network device 101 to instruct the network device 101 to send the first information. After receiving the second information, the network device 101 may send the first information to the terminal device 102. Under the condition that the second information is not received, the network device 101 does not need to send the first information to the terminal device 102, so as to reduce occupation of air interface resources.

Therefore, as shown in fig. 6, in the above embodiment of the present application, before S201, the method may further include:

s204, the terminal device 102 obtains the downlink channel quality of the terminal device 102.

The downlink channel quality may be the channel quality of various types of downlink signals sent by the terminal device receiving network side device (including but not limited to the network device 101).

Illustratively, step S204 may specifically include: the terminal device 102 obtains parameters such as a Signal-to-noise ratio (SNR), a Signal-to-interference plus noise ratio (SINR), or a Reference Signal Receiving Power (RSRP) of a received Signal. For example, terminal device 102 may perform measurements based on terminal device specific (UE-specific) CSI-RS, obtaining RSRP or SINR.

S205, when the quality of the downlink signal is lower than a preset threshold, the terminal device 102 sends a second message to the network device 101.

The second information is used to indicate that the terminal device 102 needs the network device to send the first information. In other words, it can also be understood that the second information is used to request the network device 101 to transmit the first information to the terminal device 102.

Continuing with the above example, when the current RSRP, SNR, or SINR obtained by the terminal device 102 is higher, it is indicated that the channel quality of the current terminal device 102 is better, and better signal estimation accuracy and correct data demodulation performance can be ensured, that is, the interference of the second system reference signal has little influence on the performance of the terminal device 102 at this time. Further, the terminal apparatus 102 may not transmit the second information to the network apparatus 101. The network device 101 also does not need to send the first information to the terminal device 102.

When the current RSRP, SNR, or SINR obtained by the terminal device 102 is low, this indicates that the terminal device 102 may be interfered by the stronger reference signal in the second system. Further, the terminal apparatus 102 transmits the second information to the network apparatus 101, so that the network apparatus 101 transmits the first information to the terminal apparatus 102 after receiving the second information, and further performs interference suppression according to the content of S203.

It should be noted that, after receiving the second information, the network device 101 may determine whether to send the first information to the terminal device 102 according to its resource occupation status. That is, the role of the second information may be understood as that the terminal device informs the network device 101 that the terminal device 102 has a need to suppress interference, while the network device 101 does not necessarily trigger an action of sending the first information to the terminal device 102 after receiving the second information. Whether to trigger the action of sending the first information to the terminal apparatus 102 may be determined by the network apparatus 101 according to information such as its own resource occupation status.

In one example, the second information may include parameters characterizing channel quality of the terminal device 102. For example, one or more of RSRP, SNR, or SINR of terminal device 102 may be included in the second information. Furthermore, after receiving the second information, network device 101 determines that terminal device 102 needs network device 101 to send the first information by determining the magnitude relationship between the RSRP, SNR, or SINR of terminal device 102 and the preset threshold value, and then determining that terminal device 102 needs network device 101 to send the first information after the RSRP, SNR, or SINR of terminal device 102 is smaller than the preset threshold value, so as to trigger network device 101 to send the first information to terminal device 102.

In another example, the second information may be a preset identification. The preset identifier is used to indicate that the current channel quality of the terminal device 102 is lower than a preset threshold value. For example, the preset identifier may be carried on a PUCCH or a PUSCH and occupies 1 bit. For example, taking the preset identifier as 0 as an example, when the channel quality of the terminal device 102 is lower than a preset threshold value, the terminal device 102 sends "0" to the network device 101 through the PUCCH or the PUSCH, so that after the network device 101 receives the "0", it is determined that the terminal device 102 needs the network device 101 to send the first information, and the network device 101 is triggered to send the first information to the terminal device 102.

That is to say, in this embodiment of the application, when the channel quality is lower than the preset threshold, the terminal device 102 sends the second information to the network device 101 to trigger the network device 101 to send the first information to the terminal device 102. The content specifically included in the second information may not be limited in this application.

In one implementation, in a scenario where a terminal device may be interfered by reference signals from multiple cells in a second system, due to different interference suppression capabilities of different terminal devices, a terminal device with poor performance (for example, a terminal device with a weak operation capability and a long processing delay) may support a smaller number of interference-suppressed cells; the terminal device with stronger performance (e.g., stronger computing capability and shorter processing delay) can support a larger number of cells for interference suppression. Therefore, when the terminal device 102 needs to perform interference suppression, in such a way that the terminal device 102 transmits the number of interference-suppressed cells supported by the terminal device 102 to the network device 101, the network device 101 can be made to transmit the parameter configuration of the reference signals conforming to the number of cells to the terminal device 102 in a targeted manner according to the number of interference-suppressed cells supported by the terminal device 102. Therefore, in the above method according to the embodiment of the present application, as shown in fig. 7, before S201, the method may further include:

s206, the terminal device 102 sends the third information to the network device 101.

Wherein the third information is used for indicating the number of interference signals processed by the terminal device 102. The interference signal is a reference signal of the second system.

In one implementation, the number of interference signals processed by the terminal device 102 may refer to the number of interference signals that can be processed by the terminal device 102 at maximum. For example, the terminal device may determine, according to its own processing capability, that the terminal device can maximally reduce interference from reference signals of N second systems, that is, the number of interference signals that the terminal device can maximally process is N; the terminal device then sends third information indicating the number N to the network device. In this way, the network device can determine that the terminal device can process the N interference signals at maximum, and then send parameter configuration of the reference signals of the second system to the terminal device, the number of which is matched with the processing capability of the terminal device.

For example, in one example, the third information may be the number of interference signals that the terminal device 102 can handle at maximum. For example, when the maximum number of interference signals that can be processed by the terminal apparatus 102 is 1, the third information is "001". When the maximum number of interference signals that can be processed by the terminal device 102 is 2, the third information is "010", and so on. In specific implementation, the bit number occupied by the third information may be determined according to actual needs. For example, at present, a mobile communication network adopts a cellular network structure, and thus one terminal device may be interfered by reference signals of 6 neighboring cells. Since 6 neighbors may correspond to 6 reference signals, the 3-bit field may be utilized to carry the third information as in the above example. In other cases, a greater or lesser number of bits may be used to carry the third information, which may not be limiting.

In another example, the third information may include performance parameters of the terminal device 102 (e.g., parameters related to the operational capability of the terminal device 102, etc.). After receiving the performance parameter, the network device 101 may determine, according to the performance parameter, the number of interference signals that can be processed by the terminal device 102 to the maximum.

In another implementation, the third information is specifically used for indicating the number of interference signals that the terminal device needs to process. For example, the terminal device may determine, according to information such as channel quality of a current downlink channel, the number M of reference signals of the second system that generate interference to the terminal device, that is, determine that the number of interference signals that the terminal device needs to process is M. The terminal device then sends third information indicating the number M to the network device. Therefore, the network equipment can determine that the terminal equipment needs to process the M interference signals, and then send the parameter configuration of the reference signals of the second system, the number of which is matched with the number of the terminal equipment needs, to the terminal equipment.

By means of the terminal device sending the third information to the network device, the network device can determine the number of the reference signals of the second system indicated in the first information according to the number of the interference signals indicated by the third information. For example, when the third information indicates that the number of interference signals that can be processed by the terminal device at maximum is N, the network device may send, to the terminal device, first information indicating parameter configurations of reference signals of N second systems according to the number N of interference signals indicated by the third information. It should be noted that, after determining the number N of interference signals indicated by the third information, the network device does not necessarily indicate parameter configurations of reference signals of N second systems to the terminal device, and at this time, the first information may also be used to indicate parameter configurations of reference signals of other numbers of second systems. For example, in some scenarios, the network device may send first information indicating parameter configurations of reference signals of more than N second systems to the terminal device, so that the terminal device selects suitable N reference signals from the reference signals of more than N second systems, and determines the parameter configurations of the N reference signals according to the first information, so as to reduce interference of the N reference signals on the received signal of the first system. Also, in other scenarios, the network device may send the terminal device first information indicating a parameter configuration of reference signals of less than N second systems. The number of reference signals of the second system indicated in the first information sent by the network device to the terminal device after the network device receives the third information may not be limited in the present application.

In another implementation, in such a case that the terminal device 102 has the capability of determining from which cell the interfering signal originates, before the network device 101 sends the first information to the terminal device 102, the network device 101 may be caused to determine that the reference signal causing interference to the terminal device 102 is a reference signal belonging to which cells in the second system by sending, by the terminal device 102, an identification of a second cell in the second system to the network device 101. Further, the network device 101 may notify the terminal device 102 of the parameter configuration of the reference signal of the second cell by sending the first information.

For example, first, the terminal device 102 performs a preliminary analysis on the signal from the second system, and can obtain an identifier of a cell that transmits the signal (at this time, the terminal device 102 does not need to analyze the signal from the second system to obtain detailed parameters, such as time-frequency position, carrying content, and the like, of the reference signal of the corresponding cell. Then, the terminal apparatus 102 transmits information indicating the identity of the cell (hereinafter referred to as "fourth information") to the network apparatus 101. Then, the network device 101 may determine which cells have interference with the terminal device according to the fourth information, and further indicate parameter configuration of the reference signals of the cells in the first information.

Therefore, as shown in fig. 8, before S201, the method may further include:

s207, the terminal device 102 sends the fourth information to the network device 101.

Wherein the fourth information is used for indicating the identification of one or more second cells in the second system where the reference signals interfere with the terminal device 102.

In an implementation manner, in the method provided in this embodiment of the present application, when sending the first information to the terminal device 102, the network device 101 may send the first information to the terminal device 102 by carrying the first information in an RRC signaling. As shown in fig. 9, S201 may specifically include:

s201a, the network device 101 sends the first RRC signaling to the terminal device 102. Wherein, the first RRC signaling includes first information.

The S202 may specifically include:

s202a, the terminal device 102 receives the first RRC signaling from the network device 101.

For example, taking the reference signal generating interference to the terminal device 102 as the CRS in the LTE system, it is considered that the CRS in the LTE system is transmitted in 10 ms. Accordingly, the first information may be periodically transmitted by the network device 101 to the terminal device 102 every 10ms, where the first information is used to indicate the parameter configuration of the CRS. In this way, the terminal device 102 may determine the parameter configuration of the CRS for interference suppression according to the first information.

For another example, since the CRS does not change every cycle, the network device 101 may transmit the first information to the terminal device only in the cycle in which the CRS changes, and does not necessarily transmit the first information once every change cycle (10ms) of the CRS. In this way, when the terminal device 102 does not receive the first information in one period, it may be determined that the parameter configuration of the CRS is not changed, and the interference suppression may be performed along with the parameter configuration of the CRS indicated in the first information transmitted last time.

Further, in a possible design, in order to enable the network device 101 to more quickly control the terminal device 102 to perform the interference suppression operation, a semi-static scheduling technique may be used to control the time when the terminal device 102 activates the parameter configuration in the first information in a DCI activation manner. Further, as shown in fig. 9, before S203, the method provided by the present application may further include:

s208, the network device 101 sends the first DCI to the terminal device.

Wherein the first DCI is used for indicating the activation of the parameter configuration indicated by the first information.

For example, 1-bit indication information in the DCI may be utilized to indicate whether the terminal device 102 adopts the parameter configuration in the first information.

Similarly, the parameter configuration may be deactivated in a DCI deactivation manner. For example, the fourth DCI may be sent to the terminal device 102 by the network device 101, where the fourth DCI is used to instruct to deactivate the parameter configuration indicated by the first information, so that the terminal device 102 stops adopting the parameter configuration in the first information, and no interference suppression is performed, thereby saving energy consumption.

In another implementation, considering that the time delay consumed for analyzing the information in the RRC signaling is relatively large (may reach 100ms magnitude), in order to enable the terminal device 102 to timely acquire the content of the first information, the first information may be carried in DCI for transmission in the present application. Further, S201 may specifically include:

s201b, the network device 101 sends the second DCI to the terminal device 102. And the second DCI comprises the first information.

The S202 may specifically include:

s202b, the terminal apparatus 102 receives the second DCI from the network apparatus 101.

For example, the second DCI may include a plurality of fields, where each field is used to indicate a parameter of a CRS of a second cell that interferes with the terminal device 102, for example: one item of the number of one or more second cells, the PCI of each second cell, a subframe number offset value, a system bandwidth, a center subcarrier position, a type of a cyclic prefix, and a time-frequency position of an MBSFN subframe in the second system.

Taking the number of one or more second cells and the number of antenna ports of each second cell as examples: the second DCI may include a first field and a second field. The first field is used for indicating the number of one or more second cells, and the second field is used for indicating the number of antenna ports of each second cell.

For example, table 1 below shows two values of the first field:

TABLE 1

Number of second cells	1	2	3	4	5	6
							Value taking mode one	000	001	010	011	100	101
Value taking mode two	001	010	011	100	101	110

Wherein, the first field starts from "0" in the first value-taking mode, and the first field starts from "1" in the second value-taking mode. For example, if the parameter configuration indicated by the first information includes parameter configurations of CRSs of two second cells, the value of the first field in the DCI is determined to be 001 according to the first value; and determining that the value of the first field in the DCI is 010 according to the value mode II.

Table 2 below shows two values of the second field:

TABLE 2

Number of antenna ports	1	2	3	4
					Value taking mode one	000	001	010	011
Value taking mode two	001	010	011	100

And the second field in the first value-taking mode starts from '0', and the second field in the second value-taking mode starts from '1'. For example, if one of the second cells has two antenna ports in the parameter configuration indicated by the first information, it is determined that the value of the second field corresponding to the second cell in the DCI is 001 according to the first value-taking mode, and it is determined that the value of the second field corresponding to the second cell in the DCI is 010 according to the second value-taking mode.

It should be noted that the field used for carrying the first information in the second DCI may be a field newly added by increasing payload size (payload size) of the DCI based on the existing DCI. The first information may also be carried by using a value of a redundancy status of an existing field in the DCI. For the way in which the second DCI carries the first information, the present application may not be limited.

In another implementation, considering that the DCI occupies limited resources, if the first information is transmitted using the DCI, the first information can be transmitted quickly, but the first information occupies too many resources on the DCI. Therefore, in order to avoid excessive occupation of DCI resources, the parameter configuration indicated by the first information may be further divided into two parts in the embodiment of the present application. Wherein, one part indicates the terminal device through RRC signaling, and the other part indicates the terminal device through DCI. Further, in the foregoing embodiment of the present application, S201 may specifically include:

s201c, the network device 101 sends the second RRC signaling and the third DCI to the terminal device 102.

Wherein the second RRC signaling comprises information for indicating the first parameter configuration. The third DCI includes information indicating the second parameter configuration.

The first parameter configuration may be information with large overhead occupied in the parameter configuration indicated by the first information; the second parameter configuration may be information that occupies little overhead in the parameter configuration indicated by the first information.

For example, since the PCI of a cell takes a value of 0 to 503, at least 9 bits are required to represent the PCI of a cell. Thus, the PCI may be used as one item in the first parameter configuration. For another example, the system bandwidth of a cell is generally divided into six values, i.e., 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz, that is, only 3 bits are needed to represent the system bandwidth of a cell. Therefore, the system bandwidth may be taken as one of the second parameter configurations.

Alternatively, the first parameter configuration may be information that changes less frequently in the parameter configuration indicated by the first information; the second parameter configuration may be information in which a frequency of change in the parameter configuration indicated by the first information is faster.

For example, the PCI of a cell changes more slowly than the system bandwidth of the cell. Thus, the PCI may be one of the first parameter configurations and the system bandwidth may be one of the second parameter configurations.

Still alternatively, the first parameter configuration and the second parameter configuration may be determined according to the occupation overhead and the change frequency of each piece of information in the parameter configuration indicated by the first information. For example, the occupancy overhead and the change frequency of each item of information in the parameter configuration indicated by the first information may be weighted and summed, and then each item of information in the parameter configuration indicated by the first information may be divided into a first parameter configuration and a second parameter configuration according to the result of the weighted and summed. In the embodiment of the present application, the dividing manner of the first parameter configuration and the second parameter configuration may not be limited.

In the above technical solution provided in the embodiment of the present application, the network device in the first system sends, to the terminal device, the first information for indicating the parameter configuration of the reference signal of the second system, so that the terminal device can determine the parameter configuration of the reference signal of the second system. In this way, the terminal device can suppress interference generated by the reference signal of the second system when receiving the signal from the first system by reconstructing the reference signal of the second system and the like according to the parameter configuration of the reference signal of the second system.

The scheme provided by the embodiment of the present application is introduced above mainly from the perspective of interaction between devices. It should be understood that, in order to implement the corresponding functions, the terminal device or the network device includes a hardware structure and/or a software module corresponding to the execution of each function. Those skilled in the art will readily appreciate that the elements of the various examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, according to the above method example, functional modules of devices (including terminal devices and network devices) may be divided, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. Optionally, the division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

Fig. 10 is a schematic diagram illustrating a communication device 30 according to an embodiment of the present disclosure. The communication means 30 may be a chip or a system on a chip in the terminal device. The communication device 30 may be used to perform the functions of the terminal apparatus 102 referred to in the above embodiments. As one implementation, the communication device 30 includes: a receiving unit 301. Wherein:

the receiving unit 301 is configured to perform S201 in fig. 3. For example, the receiving unit 301 may receive first information from a first system. Wherein the first information is used for indicating the parameter configuration of the reference signal of the second system. The first system employs a first radio access technology and the second system employs a second radio access technology, the first radio access technology being different from the second radio access technology.

And the parameter configuration of the reference signal of the second system is used for reducing the interference of the reference signal to the received signal of the first system. Thus, in one possible design, the communication device 30 further includes: an interference cancellation unit 302. An interference cancellation unit 302, configured to reduce interference of the reference signal of the second system with the received signal of the first system according to the parameter configuration of the reference signal of the second system.

In one possible design, the communication device 30 further includes: a transmitting unit 303.

The sending unit 303 is configured to send second information to the network device 101 when the quality of the downlink channel is lower than a preset threshold; the second information is used to indicate to the network device 101 that the terminal device 102 needs the network device 101 to send the first information.

In a possible design, the sending unit 303 is configured to send, to the network device 101, third information, where the third information is used to indicate a number of interference signals processed by the terminal device, and the interference signals are reference signals of the second system.

In a possible design, the receiving unit 301 is specifically configured to receive a first RRC signaling from the network device 101 of the first system, where the first RRC signaling includes the first information.

In one possible design, the receiving unit 301 is further configured to receive a first DCI from the network device 101, where the first DCI is used to indicate that the parameter configuration is activated.

In one possible design, the receiving unit 301 is specifically configured to receive a second DCI from the network device 101 of the first system, where the second DCI includes the first information.

In one possible design, the parameter configuration includes a first parameter configuration and a second parameter configuration.

The receiving unit 301 is specifically configured to receive a second RRC signaling and a third DCI from the network device 101 of the first system, where the second RRC signaling includes information used for indicating the first parameter configuration; the third DCI includes information indicating the second parameter configuration.

In one possible design, the parameter configuration includes time-frequency location indication information of the reference signal and indication information of a reference signal generation parameter.

The parameter configuration may specifically include one or more of the following parameters: the Physical Cell Identity (PCI) of a second cell in the second system, a subframe number offset value corresponding to a cell specific reference signal (CRS), the number of antenna ports, the system bandwidth, the position of a central subcarrier, the type of a cyclic prefix and the time-frequency position of a multicast/multicast single-frequency network (MBSFN) subframe.

In one possible design, the first radio access technology is an LTE technology; the second radio access technology is a 5GNR technology.

Fig. 11 is a schematic diagram illustrating a communication device 40 according to an embodiment of the present disclosure. The communication device 40 may be a chip or a system on a chip in a network apparatus. The communication device 40 may be configured to perform the functions of the network apparatus 101 described in the above embodiments. As one implementation, the communication device 40 includes: a transmission unit 401. Wherein:

a sending unit 401, configured to send first information to the terminal device 102; the first information is used for indicating the parameter configuration of the reference signal of the second system; the first system employs a first radio access technology, the second system employs a second radio access technology, and the first radio access technology is different from the second radio access technology.

In one possible design, communication device 40 further includes: a receiving unit 402.

A receiving unit 402, configured to receive second information from the terminal device 102; the second information is used to indicate to the network device 101 that the terminal device 102 needs the network device to send the first information.

The receiving unit 402 is configured to receive third information from the terminal device 102; the third information is used to indicate the number of interference signals processed by the terminal device 102, where the interference signals are reference signals of the second system.

In a possible design, the sending unit 401 is specifically configured to send a first RRC signaling to the terminal device 102; the first RRC signaling includes the first information.

In one possible design, the sending unit 401 is further configured to send a first DCI to the terminal apparatus 102; the first DCI is used for indicating activation of the parameter configuration.

In a possible design, the sending unit 401 is specifically configured to send a second DCI to the terminal apparatus 102; the second DCI includes the first information.

In one possible design, the parameter configuration includes a first parameter configuration and a second parameter configuration;

the sending unit 401 is specifically configured to send a second RRC signaling and a third DCI to the terminal device 102; the second RRC signaling comprises information for indicating the first parameter configuration; the third DCI includes information indicating the second parameter configuration.

Fig. 12 shows a schematic diagram of the components of a communication device 50. Wherein, the communication device 50 includes: one or more processors 501 and one or more memories 502. The one or more processors 501 are coupled to one or more memories 502, the memories 502 for storing computer-executable instructions. Illustratively, in some embodiments, the processor 501, when executing the instructions stored in the memory 502, causes the communication apparatus 50 to perform the operations S202, S203 shown in fig. 3, and other operations that the terminal device 102 needs to perform. In other embodiments, the instructions stored in the memory 502 when executed by the processor 501 cause the communication apparatus 50 to perform S201 shown in fig. 3, as well as other operations that the network device 101 needs to perform.

The communication device 50 may further include a communication bus 503 and at least one communication interface 504.

The processor 501 may be a Central Processing Unit (CPU), a micro-processing unit, an ASIC, or one or more integrated circuits for controlling the execution of programs according to the present disclosure.

The communication bus 503 may include a path that conveys information between the aforementioned components.

The communication interface 504 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc.

The memory 502 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and connected to the processing unit by a bus. The memory may also be integrated with the processing unit.

The memory 502 is used for storing instructions for executing the disclosed solution, and is controlled by the processor 501 for execution. The processor 501 is configured to execute instructions stored in the memory 502 to implement the functions of the disclosed method.

In particular implementations, processor 501 may include one or more CPUs such as CPU0 and CPU1 in fig. 9 as an example.

In particular implementations, communication device 50 may include multiple processors, such as processor 501 and processor 507 in fig. 9, for example, as an example. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In one implementation, the communication apparatus 50 may further include an output device 505 and an input device 506. An output device 505, which is in communication with the processor 501, may display information in a variety of ways. For example, the output device 505 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The input device 506 is in communication with the processor 501 and can accept user input in a variety of ways. For example, the input device 506 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

The embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed, the method provided in the embodiment of the present application is executed.

Embodiments of the present application also provide a computer program product including instructions. When the method is run on a computer, the computer can be enabled to execute the method provided by the embodiment of the application.

In addition, the embodiment of the application also provides a chip. The chip includes a processor. When the processor executes the computer program instructions, the chip can be enabled to execute the method provided by the embodiment of the application. The instructions may come from memory internal to the chip or from memory external to the chip. Optionally, the chip further includes an input/output circuit as a communication interface.

The functions or actions or operations or steps, etc., in the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present application are all or partially generated upon loading and execution of computer program instructions on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or can comprise one or more data storage devices, such as a server, a data center, etc., that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include such modifications and variations.

Claims

1. A method of communication, comprising:

the terminal equipment receives first information from network equipment of a first system; the first information is used for indicating the parameter configuration of the reference signal of the second system; the first system employs a first radio access technology, the second system employs a second radio access technology, and the first radio access technology is different from the second radio access technology.

2. The method of claim 1, further comprising:

when the quality of a downlink channel is lower than a preset threshold value, the terminal equipment sends second information to the network equipment; the second information is used for indicating the terminal device to the network device that the network device needs to send the first information.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

and the terminal equipment sends third information to the network equipment, wherein the third information is used for indicating the number of interference signals processed by the terminal equipment, and the interference signals are reference signals of the second system.

4. The method according to any of claims 1-3, wherein the terminal device receives the first information from the network device of the first system, comprising:

the terminal device receives a first radio resource control RRC signaling from the network device of the first system, where the first RRC signaling includes the first information, and the method further includes: the terminal equipment receives first Downlink Control Information (DCI) from the network equipment, wherein the first DCI is used for indicating the activation of the parameter configuration.

5. The method according to any of claims 1-3, wherein the terminal device receives the first information from the network device of the first system, comprising:

the terminal device receives second DCI from the network device of the first system, the second DCI including the first information.

6. The method according to any of claims 1-3, wherein the parameter configuration comprises a first parameter configuration and a second parameter configuration;

the terminal equipment receives first information from network equipment of a first system, and the first information comprises:

the terminal device receives second RRC signaling and third DCI from the network device of the first system, wherein the second RRC signaling comprises information used for indicating the first parameter configuration; the third DCI includes information indicating the second parameter configuration.

7. The method according to any of claims 1-6, wherein the parameter configuration comprises information indicative of the time-frequency location of the reference signal and information indicative of a reference signal generation parameter.

8. The method according to any of claims 1-7, wherein the first radio access technology is long term evolution, LTE, technology; the second radio access technology is a 5G new air interface 5G NR technology.

9. A method of communication, comprising:

the method comprises the steps that network equipment of a first system sends first information to terminal equipment; the first information is used for indicating the parameter configuration of the reference signal of the second system; the first system employs a first radio access technology, the second system employs a second radio access technology, and the first radio access technology is different from the second radio access technology.

10. The method of claim 9, further comprising:

the network equipment receives second information from the terminal equipment; the second information is used for indicating the terminal device to the network device that the network device needs to send the first information.

11. The method according to claim 9 or 10, characterized in that the method further comprises:

the network equipment receives third information from the terminal equipment; the third information is used for indicating the number of interference signals processed by the terminal equipment, and the interference signals are reference signals of the second system.

12. The method according to any of claims 9-11, wherein the network device of the first system sends first information to the terminal device, comprising:

the network equipment of the first system sends a first Radio Resource Control (RRC) signaling to the terminal equipment; the first RRC signaling comprises the first information; the method further comprises the following steps:

the network equipment sends first downlink control information DCI to the terminal equipment; the first DCI is used for indicating activation of the parameter configuration.

13. The method according to any of claims 9-11, wherein the network device of the first system sends first information to the terminal device, comprising:

the network equipment of the first system sends second DCI to the terminal equipment; the second DCI includes the first information.

14. The method according to any of claims 9-11, wherein the parameter configuration comprises a first parameter configuration and a second parameter configuration;

the network device of the first system sends first information to the terminal device, and the first information comprises:

the network equipment of the first system sends second RRC signaling and third DCI to the terminal equipment; the second RRC signaling comprises information for indicating the first parameter configuration; the third DCI includes information indicating the second parameter configuration.

15. The method according to any of claims 9-14, wherein the parameter configuration comprises information indicative of the time-frequency location of the reference signal and information indicative of a reference signal generation parameter.

16. The method according to any of claims 9-15, wherein the first radio access technology is long term evolution, LTE, technology; the second radio access technology is a 5G new air interface 5G NR technology.

17. A communications apparatus, comprising:

a receiving unit configured to receive first information from a network device of a first system; wherein the first information is used for indicating the parameter configuration of the reference signal of the second system; the first system employs a first radio access technology, the second system employs a second radio access technology, and the first radio access technology is different from the second radio access technology.

18. The apparatus of claim 17, further comprising: a transmitting unit;

the sending unit is configured to send second information to the network device when the channel quality of the downlink signal of the communication apparatus is lower than a preset threshold; the second information is used to indicate to the network device that the communication apparatus needs the network device to send the first information.

19. The apparatus of claim 17 or 18, further comprising: a transmitting unit;

the sending unit is configured to send third information to the network device, where the third information is used to indicate the number of interference signals processed by the communication apparatus, and the interference signals are reference signals of the second system.

20. The apparatus of any one of claims 17-19,

the receiving unit is specifically configured to receive a first radio resource control RRC signaling from the network device of the first system, where the first RRC signaling includes the first information;

the receiving unit is further configured to receive first downlink control information DCI from the network device, where the first DCI is used to indicate to activate the parameter configuration.

21. The apparatus of any one of claims 17-19,

the receiving unit is specifically configured to receive a second DCI from the network device of the first system, where the second DCI includes the first information.

22. The apparatus according to any of claims 17-19, wherein the parameter configuration comprises a first parameter configuration and a second parameter configuration;

the receiving unit is specifically configured to receive a second RRC signaling and a third DCI from the network device of the first system, where the second RRC signaling includes information used for indicating the first parameter configuration; the third DCI includes information indicating the second parameter configuration.

23. The apparatus according to any of claims 17-22, wherein the parameter configuration comprises information indicative of a time-frequency location of the reference signal and information indicative of a reference signal generation parameter.

24. The apparatus according to any of claims 17-23, wherein the first radio access technology is long term evolution, LTE, technology; the second radio access technology is a 5G new air interface 5G NR technology.

25. A communications apparatus, comprising:

a sending unit, configured to send first information to a terminal device; the first information is used for indicating the parameter configuration of the reference signal of the second system; the first system employs a first radio access technology, the second system employs a second radio access technology, and the first radio access technology is different from the second radio access technology.

26. The apparatus of claim 25, further comprising: a receiving unit;

the receiving unit is used for receiving second information from the terminal equipment; the second information is used for indicating the communication device that the terminal equipment needs the communication device to send the first information.

27. The apparatus of claim 25 or 26, further comprising: a receiving unit;

the receiving unit is used for receiving third information from the terminal equipment; the third information is used for indicating the number of interference signals processed by the terminal equipment, and the interference signals are reference signals of the second system.

28. The apparatus according to any of claims 25-27, wherein the sending unit is specifically configured to send a first radio resource control, RRC, signaling to the terminal device; the first RRC signaling comprises the first information;

the sending unit is further configured to send first downlink control information DCI to the terminal device; the first DCI is used for indicating activation of the parameter configuration.

29. The apparatus according to any of claims 25-27, wherein the transmitting unit is specifically configured to transmit a second DCI to the terminal device; the second DCI includes the first information.

30. The apparatus according to any of claims 25-27, wherein the parameter configuration comprises a first parameter configuration and a second parameter configuration;

the sending unit is specifically configured to send a second RRC signaling and a third DCI to the terminal device; the second RRC signaling comprises information for indicating the first parameter configuration; the third DCI includes information indicating the second parameter configuration.

31. The apparatus according to any of claims 25-30, wherein the parameter configuration comprises time-frequency location indication information of the reference signal and indication information of a reference signal generation parameter.

32. The apparatus according to any of claims 25-31, wherein the first radio access technology is long term evolution, LTE, technology; the second radio access technology is a 5G new air interface 5G NR technology.

33. A communications apparatus, comprising one or more processors, the one or more processors coupled with one or more memories; the one or more memories store computer instructions;

the computer instructions, when executed by the one or more processors, cause the communication device to perform the communication method of any one of claims 1-8, or,

the computer instructions, when executed by the one or more processors, cause the communication device to perform the communication method of any of claims 9-16.

34. A chip, wherein the chip comprises processing circuitry and an interface; the processing circuit is configured to call and run a computer program stored in a storage medium from the storage medium to execute the communication method according to any one of claims 1 to 8, or to execute the communication method according to any one of claims 9 to 16.

35. A computer-readable storage medium having instructions stored therein; when executed, perform a communication method as provided in any of the preceding claims 1-8, or perform a communication method as provided in any of the preceding claims 9-16.