Wireless communication method and device, equipment and storage medium

Abstract

A wireless communication method and apparatus, device, and storage medium, the method comprising: a first access network device sends first indication information to at least one second access network device, the first indication information being used for requesting to expand the coverage area of the second access network device and / or for requesting to reduce the transmission power of the first access network device; and under the condition that the first access network equipment receives second indication information sent by each second access network equipment in the at least one second access network equipment, reducing the transmitting power of the first access network equipment, the second indication information is used for indicating to expand the coverage area of the second access network equipment and / or indicating to reduce the transmitting power of the first access network equipment.

Description

Wireless communication method, device, equipment, and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of mobile communication technology, and specifically to a wireless communication method and apparatus, device, and storage medium. Background Art

[0002] In cellular mobile communications systems, base stations, as nodes that communicate with terminals, transmit network data to terminals in the form of downlink wireless signals and simultaneously receive uplink signals from terminals. The downlink signal coverage area of ​​a base station and the uplink signal coverage area of ​​a terminal together determine the size of a cell. To maintain continuous network coverage and real-time availability, base stations are typically kept operational at all times.

[0003] Summary of the Invention

[0004] Embodiments of the present application provide a wireless communication method, apparatus, device, and storage medium.

[0005] An embodiment of the present application provides a wireless communication method, including:

[0006] The first access network device sends first indication information to at least one second access network device, where the first indication information is used to request expansion of the coverage area of ​​the second access network device and / or to request reduction of the transmit power of the first access network device;

[0007] When the first access network device receives the second indication information sent by each second access network device among the at least one second access network device, the transmission power is reduced, and the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

[0008] An embodiment of the present application provides a wireless communication method, including:

[0009] The second access network device receives first indication information sent by the first access network device, where the first indication information is used to request expansion of the coverage area of ​​the second access network device and / or to request reduction of the transmit power of the first access network device;

[0010] When the second access network device sends second indication information to the first access network device, the coverage area is expanded, and the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

[0011] An embodiment of the present application provides a wireless communication device, including:

[0012] a first communication unit, configured to send, as a first access network device, first indication information to at least one second access network device, where the first indication information is used to request expansion of the coverage area of ​​the second access network device and / or to request reduction of the transmit power of the first access network device;

[0013] The first control unit is configured to reduce the transmission power of the first access network device upon receiving second indication information sent by each second access network device among the at least one second access network device, wherein the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

[0014] An embodiment of the present application provides a wireless communication device, including:

[0015] a second communication unit configured to receive first indication information sent by a first access network device, where the first indication information is used to request expansion of a coverage area of ​​the second access network device and / or to request reduction of a transmit power of the first access network device;

[0016] The second communication unit is configured to expand the coverage area when sending second indication information to the first access network device, where the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

[0017] The communication device provided in an embodiment of the present application may be the first access network device in the above-mentioned solution or the second access network device in the above-mentioned solution, and the communication device includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and execute the computer program stored in the memory to perform the above-mentioned wireless communication method.

[0018] The chip provided in the embodiment of the present application is used to implement the above-mentioned wireless communication method.

[0019] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned wireless communication method.

[0020] The computer-readable storage medium provided in an embodiment of the present application is used to store a computer program, which enables a computer to execute the above-mentioned wireless communication method.

[0021] The computer program product provided in the embodiments of the present application includes computer program instructions, which enable a computer to execute the above-mentioned wireless communication method.

[0022] The computer program provided in the embodiment of the present application, when executed on a computer, enables the computer to execute the above-mentioned wireless communication method.

[0023] Through the above technical solution, the first access network device reduces its own transmission power through negotiation with at least one second access network device, and the second terminal device expands the coverage area, so that the expanded coverage area of ​​at least one second access network device covers the coverage area of ​​the first access network device, thereby realizing the merging of cells of different access network devices and reducing the power consumption of access network devices through the collaboration of multiple access network devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] FIG1 is a schematic diagram of an application scenario of an embodiment of the present application;

[0026] FIG2 is a schematic diagram of an application scenario of an embodiment of the present application;

[0027] FIG3 is an optional flowchart of a wireless communication method according to an embodiment of the present application;

[0028] FIG4 is an optional schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0029] FIG5 is an optional schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0030] FIG6 is a schematic diagram of an application scenario of an embodiment of the present application;

[0031] FIG7 is a schematic diagram of an application scenario of an embodiment of the present application;

[0032] FIG8 is a schematic diagram of an application scenario of an embodiment of the present application;

[0033] FIG9 is a schematic diagram of an application scenario of an embodiment of the present application;

[0034] FIG10 is a schematic diagram of an application scenario of an embodiment of the present application;

[0035] FIG11 is a schematic diagram of an application scenario of an embodiment of the present application;

[0036] FIG12 is a schematic diagram of an application scenario of an embodiment of the present application;

[0037] FIG13 is a schematic diagram of an application scenario of an embodiment of the present application;

[0038] FIG14 is a schematic diagram of an application scenario of an embodiment of the present application;

[0039] FIG15 is a schematic diagram of an application scenario of an embodiment of the present application;

[0040] FIG16 is a schematic diagram of an application scenario of an embodiment of the present application;

[0041] FIG17 is a schematic diagram of an application scenario of an embodiment of the present application;

[0042] FIG18 is a schematic diagram of an application scenario of an embodiment of the present application;

[0043] FIG19 is a schematic diagram of an optional structure of a wireless communication device according to an embodiment of the present application;

[0044] FIG20 is a schematic diagram of an optional structure of a wireless communication device according to an embodiment of the present application;

[0045] FIG21 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0046] FIG22 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0047] Figure 23 is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] FIG1 is a schematic diagram of an application scenario of an embodiment of the present application.

[0050] As shown in Figure 1, a communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0051] It should be understood that the embodiments of the present application are only illustrative of the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems.

[0052] In the communication system 100 shown in Figure 1, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 110 (eg, UE) located within the coverage area.

[0053] The network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0054] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0055] For example, the terminal device 110 may refer to an access terminal, UE, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

[0056] The terminal device 110 can be used for device-to-device (D2D) communication.

[0057] The wireless communication system 100 may also include a core network device 130 for communicating with the base station. The core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), or an SMF. Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device of the LTE network, such as a Session Management Function + Core Packet Gateway (SMF+PGW-C) device. It should be understood that SMF+PGW-C can simultaneously implement the functions that can be implemented by SMF and PGW-C. During the network evolution process, the above-mentioned core network device may also be called other names, or a new network entity may be formed by dividing the functions of the core network, which is not limited in the embodiments of the present application.

[0058] The functional units in the communication system 100 may also establish connections and implement communication via next generation (NG) network interfaces.

[0059] Figure 1 exemplarily shows a base station, a core network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple base station devices and the coverage area of ​​each base station may include other numbers of terminal devices, which is not limited in this embodiment of the present application.

[0060] It should be noted that Figure 1 is merely an example of a system applicable to this application. Of course, the methods described in the embodiments of this application can also be applied to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and / or" herein simply describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the associated objects are in an "or" relationship. It should also be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, "A indicates B" can mean that A directly indicates B, for example, B can obtain information through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can obtain information through C; or it can mean that A and B have an association relationship. It should also be understood that the "correspondence" mentioned in the embodiments of this application can mean that there is a direct or indirect correspondence between two objects, or that there is an association relationship between the two objects, or a relationship between an indicator and the indicated, a configuration and the configured, and so on. It should also be understood that the “predefined” or “predefined rules” mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit its specific implementation method. For example, predefined can refer to a definition in a protocol. It should also be understood that in the embodiments of the present application, the “protocol” can refer to a standard protocol in the field of communications, such as an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0061] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0062] As a node for communicating with terminals, as shown in Figure 2, a base station transmits data from the network in the form of downlink signals to terminals within its coverage area, while also receiving uplink signals from those terminals. Base station power consumption is multifaceted. From the perspective of wireless signal transmission and reception, both transmitted and received signals contribute to power consumption, with transmitted signals accounting for the majority of power consumption.

[0063] To maintain continuous network coverage and real-time availability, base stations typically remain operational at all times. However, this presents a problem in certain situations (such as at night) when the number of users in a cell is small. This forces the base station to maintain coverage and transmit and receive signals even under low or no load conditions, resulting in low energy efficiency and high power consumption.

[0064] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0065] The wireless communication method provided in an embodiment of the present application is applied to a first access network device, as shown in FIG3 , and includes:

[0066] S301. A first access network device sends first indication information to at least one second access network device, where the first indication information is used to request expansion of a coverage area of ​​the second access network device and / or to request reduction of a transmission power of the first access network device.

[0067] S302. When the first access network device receives second indication information sent by each second access network device among the at least one second access network device, the first access network device reduces the transmission power, where the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

[0068] The wireless communication method provided in an embodiment of the present application is applied to any second access network device among at least one second access network device, as shown in FIG4 , including:

[0069] S401. A second access network device receives first indication information sent by a first access network device, where the first indication information is used to request expansion of a coverage area of ​​the second access network device and / or to request reduction of a transmission power of the first access network device.

[0070] S402. When the second access network device sends second indication information to the first access network device, the coverage area is expanded, and the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

[0071] The wireless communication method provided in an embodiment of the present application is applied to a wireless communication system including a first access network device and a second access network device, as shown in FIG5 , including:

[0072] S501. A first access network device sends first indication information to at least one second access network device, where the first indication information is used to request expansion of a coverage area of ​​the second access network device and / or to request reduction of a transmission power of the first access network device.

[0073] S502. The second access network device sends second indication information to the first access network device, where the second indication information is used to indicate expansion of the coverage area of ​​the second access network device and / or to indicate reduction of the transmission power of the first access network device.

[0074] S503: The first access network device reduces transmit power.

[0075] S504: The second access network device expands the coverage area.

[0076] Below, the first access network device and the second access network device in the wireless communication method provided in the embodiment of the present application are described.

[0077] The first access network device is any access network device, the second access network device is adjacent to the first access network device, and the cell under the first access network device and the cell under the second access network device form a neighboring cell.

[0078] It is understandable that an access network device may be implemented as a first access network device or a second access network device at different times.

[0079] When the first access network device determines that the transmission power consumption can be reduced, it sends a first indication message to at least one second access network device to request each of the at least one second access network device to expand the coverage area of ​​the second access network device and / or request to reduce the transmission power of the first access network device.

[0080] In some embodiments, the sending condition of the first indication information includes at least one of the following:

[0081] Sending condition A1: the first number is less than a first number threshold, where the first number is the number of terminal devices in a connected state and / or in an inactive state (InActive) under the first access network device;

[0082] Sending condition A2: the first throughput is less than a first throughput threshold, where the first throughput is the service throughput of the first access network device.

[0083] If the first access network device meets one or both of the sending conditions A1 and A2, the first access network device determines that it is under low load or no load and does not need to provide high-speed services, then it requests to reduce its own transmission power to reduce power consumption by sending the first indication information.

[0084] For a second access network device, upon receiving the first indication information, it determines whether it agrees to expand the coverage area and / or whether it allows the transmission power of the first access network device to be reduced.

[0085] When the second access network device agrees to expand its own coverage area, that is, allows the reduction of the transmission power of the first access network device, the second access network device returns second indication information to the first access network device, and the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

[0086] In the case that the second access network device does not agree to expand the coverage area, that is, does not allow the transmission power to be reduced, the second access network device may not return a response message, or may return to the first access network device an indication of not agreeing to expand the coverage area of ​​the second access network device and / or an indication information for indicating that the transmission power of the first access network device is not allowed to be reduced.

[0087] In some embodiments, the sending condition of the second indication information includes at least one of the following:

[0088] Sending condition B1: the second number is less than a second number threshold, where the second number is the number of terminal devices in a connected state and / or in an inactive state under the second access network device;

[0089] Sending condition B2: the second throughput is less than a second throughput threshold, where the second throughput is the service throughput of the second access network device.

[0090] The first quantity threshold and the second quantity threshold may be the same or different in size.

[0091] The first throughput threshold and the second throughput threshold may have the same or different underbands.

[0092] If the second access network device meets one or both of the sending conditions B1 and B2, and the first access network device determines that it does not provide high-speed services and can carry more services, it determines to agree to expand its own coverage area and / or allow the transmission power of the first access network device to be reduced, and indicates through the sending of the second indication information that the transmission power of the first access terminal device is allowed to be reduced and its own coverage area is expanded to carry the services of the first access network device.

[0093] The first access network device may reduce its own transmission power upon receiving the second indication information returned by each of the at least one second access network device. Optionally, the first access network device disables the transmission function.

[0094] When sending the second indication information, the second access network device expands its own coverage area.

[0095] In some embodiments, the second access network device expands the coverage area in at least one of the following ways:

[0096] Method 1: Reduce the transmission bandwidth;

[0097] Method 2: Reduce the modulation order of the modulation method;

[0098] Method 3: Increase the transmission power.

[0099] Corresponding to the first and second methods, the second access network device may implement the method without changing the transmission power, or may implement the method in the third method, i.e., by increasing the transmission power.

[0100] For the second method, reducing the modulation order of the modulation method can be understood as changing the modulation method, and the modulation order of the modulation method after the change is lower than the modulation order of the modulation method before the change.

[0101] In the embodiment of the present application, before the transmit power of the first access network device is reduced, its coverage area is the first coverage area. After the first access network device reduces the transmit power, the first coverage area is reduced. It is understandable that the expanded coverage area of ​​each second access network device in the at least one second access network device covers the first coverage area.

[0102] It can be understood that the first coverage area is the downlink coverage area, that is, before and after the transmission power of the first access network device is reduced, the downlink coverage area is reduced, the downlink coverage area of ​​the second access network device is expanded, and the first coverage area is reduced.

[0103] In one example, as shown in Figure 6, at least one second access network device includes an access network device: access network device 602, the downlink coverage area of ​​access network device 601 is 6011, and the downlink coverage area of ​​access network device 602 is 6021. After access network device 601 turns off the transmission function and access network device 602 expands the coverage area, coverage area 6011 will no longer exist, coverage area 6021 will be expanded to coverage area 6022, and coverage area 6022 covers coverage area 6011.

[0104] In one example, as shown in Figure 7, at least one second access network device includes two access network devices: access network device 602 and access network device 603. The downlink coverage area of ​​access network device 601 is 6011, the downlink coverage area of ​​access network device 602 is 6021, and the downlink coverage area of ​​access network device 602 is 6031. After access network device 601 turns off the transmission function and access network device 602 and access network device 603 expand the coverage area, coverage area 6011 will no longer exist, coverage area 6021 will be expanded to coverage area 6022, coverage area 6031 will be expanded to coverage area 6032, and coverage area 6022 and coverage area 6032 cover coverage area 6011.

[0105] In the wireless communication method provided in the embodiment of the present application, a first access network device and at least one second access network device negotiate to reduce the transmission power of the first access network device and expand the coverage area of ​​the second access network device, so that the expanded coverage area of ​​at least one second access network device covers the coverage area of ​​the first access network device before the transmission power is reduced, thereby realizing the merging of cells of different access network devices and reducing the power consumption of access network devices through the collaboration of multiple access network devices.

[0106] In some embodiments, a first terminal device sends an uplink signal to the first access network device and receives a downlink signal sent by the first target access network device. The first terminal device is located in the first coverage area before the first access network device reduces the transmission power and is located in the first area after the first access network device reduces the transmission power. The first coverage area is the coverage area before the first access network device reduces the transmission power. The first area is the area where the second coverage area after the first target access network device expands the coverage area overlaps with the first coverage area. The first target access network device is one of the at least one second access network devices.

[0107] After the first access network device reduces the transmission power, the first terminal device in the coverage area before the first access network device reduces the transmission power is located in the second coverage area after the first target access network device expands the coverage area. At this time, the first access network device provides uplink service for the first terminal device, and the second terminal device as the first target access network device provides downlink service for the first terminal device.

[0108] For the uplink signal of the first terminal device, the first access network device of the receiving device sends the uplink signal to the first access network device, and the first access network device receives the uplink signal sent by the first terminal device.

[0109] For the downlink signal of the first terminal device, the sending device is the first target access network device, the first target access network device sends the downlink signal to the first terminal device, and the first terminal device receives the downlink signal sent by the first target access network device.

[0110] When the at least one second access network device includes one second access network device, the first target access network device is the second access network device.

[0111] In an example, for the scenario shown in FIG6 , as shown in FIG8 , the access network device 601 receives an uplink signal sent by the terminal device 600 , and the access network device 602 sends a downlink signal to the terminal device 600 .

[0112] In the case where the at least one second access network device includes multiple second access network devices, the first target access network device may be the multiple second access network devices, and the expanded coverage area includes the second access network device of the first terminal device.

[0113] In one example, for the scenario shown in FIG7 , as shown in FIG9 , the access network device 601 receives an uplink signal sent by the terminal device 600 , and the terminal device is located in the coverage area 6023 , then the access network device 603 sends a downlink signal to the terminal device 600 .

[0114] Optionally, the first target access network device is the second access network device among the at least one second access network device with expanded coverage area, and the signal strength of the measurement signal received by the first terminal device is the strongest. It can be understood that the first target access network device is the second access network device among the at least one second access network device, and the signal strength of the measurement signal received by the first terminal device is the strongest.

[0115] The first terminal device measures the channel strength of the downlink signal of each second access network device among the at least one second access network device, and the second access network device with the strongest measured signal strength is the first target access network device. At this time, the first terminal device can determine that it is in the expanded coverage area of ​​the second access network device that is the first target access network device.

[0116] Optionally, the first terminal device determines the first target access network device based on the signal strength of the target signal, and indicates the first target access network device to the first access network device.

[0117] Optionally, the first terminal device reports the signal strength of the downlink signal of each second access network device to the first access network device, and the first access network device determines the first target access network device based on the received signal strength.

[0118] In some embodiments, the anchor access network device of the first terminal device is the first access network device or the first target access network device.

[0119] Optionally, the anchor access network device is responsible for controlling the signaling connection between the first terminal device and the access network device.

[0120] Taking the anchor device of the first terminal device as the first access network device as an example, the first access network device is responsible for the signaling connection control between the first terminal device and the access network device, and the uplink signal receiving device and the downlink signal sending device of the first terminal device default to the first target access network device.

[0121] In some embodiments, if the anchor device of the first terminal device is a first access network device, the first access network device configures the first target access network device to send a downlink signal to the first terminal device.

[0122] At this time, the first target access network device is configured by the first access network device to send a downlink signal to the first terminal device.

[0123] When the first access network device is the anchor device of the first terminal device, the first access network device sends first configuration information to the first target access network device, and the first configuration information is used to instruct the first target access network device to send a downlink signal to the first terminal device. By sending the first configuration information, the sending device of the downlink signal of the first terminal device is changed from the first access network device to the first target access network device.

[0124] Optionally, the first access network device configures the downlink carrier frequency of the first target access network device to the first terminal device, so that the downlink carrier frequency of the first target access network device configured by the terminal device monitors the downlink signal sent by the first target access network device.

[0125] Taking the anchor device of the first terminal device as the first target access network device as an example, the first terminal device performs random access on the first target access network device, so that the first target access network device is responsible for the signaling connection control between the first terminal device and the access network device, and the uplink signal receiving device and the downlink signal sending device of the first terminal device default to the first target access network device.

[0126] In some embodiments, if the anchor access network device of the first terminal device is the first target access network device, the method further includes: the first access network device is configured by the first target access network device to receive the uplink signal sent by the first terminal device.

[0127] At this time, the first target access network device configures the first access network device to receive the uplink signal sent by the first terminal device.

[0128] In the case that the first target access network device is the anchor device of the first terminal device, the first target access network device sends second configuration information to the first access network device, and the second configuration information is used to instruct the first access network device to receive the uplink signal sent by the first terminal device. By sending the second configuration information, the receiving device of the uplink signal of the first terminal device is changed from the first target access network device to the first access network device.

[0129] In some embodiments, the uplink signal is demodulated by the first access network device or the first target access network device.

[0130] When the receiving device of the uplink signal of the first terminal device is the first access network device, the first access network device may retain the demodulation function of the uplink signal of the first terminal device, or the demodulation function of the uplink signal of the first terminal device may be implemented by the first target access network device.

[0131] Taking the uplink signal demodulated by the first access network device as an example, the first access network device receives the uplink signal sent by the first terminal device and demodulates the received uplink signal. At this time, the uplink signal reception and demodulation functions of the first terminal device are both implemented by the first access network device.

[0132] Taking the uplink signal demodulated by the first target access network device as an example, the uplink signal is forwarded by the first access network device to the first target access network device. The first access network device receives the uplink signal sent by the first terminal device and transparently forwards the received uplink signal to the first target access network device. The first target access network device receives the uplink signal transparently forwarded by the first access network device and demodulates the received uplink signal. At this time, the uplink signal reception and demodulation functions of the first terminal device are respectively implemented by the first access network device and the first target access network device.

[0133] In one example, for the scenario shown in Figure 8, as shown in Figure 10, the access network device 601 receives the uplink signal sent by the terminal device 600, and the access network device 601 forwards the received uplink signal to the access network device 602, and the access network device 602 demodulates the uplink signal sent by the terminal device 600.

[0134] Optionally, the interface used to forward the uplink signal from the first access network device to the first target access network device includes at least one of the following: an air interface and a first interface, where the first interface is an interface between the first access network device and the first target access network device.

[0135] For the air interface, when the uplink signal of the first terminal device is forwarded using the air interface, the first access network device adds the information of the first target access network device as the destination address in the received uplink signal, so that the first target access network device receives the uplink signal.

[0136] Optionally, when the uplink signal is forwarded through the air interface, at least one of the following processes is performed on the uplink signal before being forwarded: power amplification; frequency conversion.

[0137] In the case where the uplink signal is power amplified, after the first access network device receives the uplink signal of the first terminal device, it can act as a relay device of the first target access network device to power amplify the received uplink signal, and send the power-amplified uplink signal to the first target access network device, thereby ensuring that the first target access network device receives the uplink signal of the first terminal device.

[0138] In the case where the uplink signal is frequency converted, after the first access network device receives the uplink signal of the first terminal device, it frequency converts the received uplink signal according to the uplink carrier frequency of the first target access network device, so that the frequency of the uplink signal of the first terminal device is converted to the uplink carrier frequency of the first target access network device, and sends the frequency-converted uplink signal to the first target access network device, thereby ensuring that the first target access network device receives the uplink signal of the first terminal device.

[0139] Optionally, the first access network device receives an uplink signal from the first terminal device on the first uplink. If the uplink carrier frequency of the first target access network device is different from the frequency used by the first uplink, the first access network device performs frequency conversion on the uplink signal to be sent to the first target access network device; if the uplink carrier frequency of the first target access network device is the same as the frequency used by the first uplink, the first access network device does not need to perform frequency conversion on the uplink signal to be sent to the first target access network device.

[0140] Optionally, the first access network device receives the uplink signal of the first terminal device on the first uplink. If the first target access network device does not support the frequency used by the first uplink, the first target access network device does not have the ability to receive the uplink signal of the first terminal device, and the first access network device performs frequency conversion on the uplink signal to be sent to the first target access network device; if the first target access network device supports the same frequency used by the first uplink, the first target access network device has the ability to receive the uplink signal of the first terminal device, and the first access network device does not need to perform frequency conversion on the uplink signal to be sent to the first target access network device.

[0141] The first interface is an interface between the first access network device and the first target access network device, and can be understood as a point-to-point interface. The first interface can be determined based on the wireless communication system, such as an X2 interface or an Xn interface. Optionally, the first interface is a physical interface implemented using optical fiber, cables, or the like.

[0142] In the wireless communication method provided in the embodiment of the present application, the first terminal device may trigger mobility management based on a change in location. The change in location of the first terminal device may include at least one of the following:

[0143] Position change 1: moving from a first area to a second area, where the second area is an area within the second coverage area that does not overlap with the first coverage area;

[0144] Position change 2: moving from the first area to the third area, where the third area is an overlapping area between the first coverage area and the third coverage area.

[0145] The second coverage area and the third coverage area are coverage areas after different second access network devices expand their coverage areas. Here, the second access network device that forms the second coverage area is called the first target access network device, and the second access network device that forms the third coverage area is called the second target access network device.

[0146] If the first terminal device is located in the first area, the receiving device of the uplink signal of the first terminal device is the first access network device, and the sending device of the downlink signal of the first terminal device is the first target access network device.

[0147] If the first terminal device is located in the second area, the uplink signal receiving device and the downlink signal sending device of the first terminal device are both the first target access network devices.

[0148] If the first terminal device is located in the third area, the receiving device of the uplink signal of the first terminal device is the first access network device, and the sending device of the downlink signal of the first terminal device is the second target access network device.

[0149] The first terminal device is located in the first area or the third area, and its uplink signal can be received by the first access network device.

[0150] The first terminal device is located in the second area and its uplink signal cannot be received by the first access network device, so the uplink signal is received by the first target access network device.

[0151] Taking the position change of the first terminal device as position change 1 as an example, the receiving device of the uplink signal is changed from the first access network device to the first target access network device.

[0152] A first terminal device is located in a first area, its uplink signal receiving device is the first access network device, and its downlink signal sending device is the first target access network device. If the first terminal device moves from the first area to a second area, its uplink signal receiving device changes from the first access network device to the first target access network device, while its downlink signal sending device remains unchanged as the first target access network device. Therefore, when the first terminal device is in the second area, both its uplink signal receiving device and downlink signal sending device are the first target access network device.

[0153] In one example, based on the scenario shown in Figure 9, as shown in Figure 11, the first area is the area where the coverage area 6011 overlaps with the coverage area 6032, and the second area is the area in the coverage area 6032 that does not overlap with the coverage area 6011. The terminal device 600 is located in the first area, then the uplink signal receiving device is the access network device 601, and the downlink signal sending device is the access network device 603. When the terminal device 600 moves from the first area to the second area, the uplink signal receiving device of the terminal device 600 is changed from the access network device 601 to the access network device 603, then the uplink signal receiving device and the downlink signal sending device of the terminal device 600 are both the access network device 603.

[0154] In some embodiments, a condition for determining that the first terminal device moves from the first area to the second area includes one of the following:

[0155] The signal strength of the uplink signal received by the first access network device is lower than a first strength threshold;

[0156] The signal strength of the downlink signal received by the first terminal device is higher than a second strength threshold.

[0157] Optionally, under the indication of the access network, the first access network device measures the signal strength of the received uplink signal. When the signal strength of the received uplink signal is lower than a first strength threshold, it is determined that the distance between the first terminal device and the first access network device is greater than a first distance threshold of one of the first strength threshold, and the first terminal device is determined to have left the first coverage area. When the at least one second access network device includes only one second access network device, the first access network device determines that the first terminal device has left the first area.

[0158] Optionally, in a terminal measurement-based manner, the first terminal device measures the signal strength of the downlink signal received from the first target access network device. When the signal strength of the received downlink signal is higher than a second strength threshold, it is determined that the distance between the location of the first terminal device and the first target access network device is less than a second distance threshold corresponding to the second strength threshold.

[0159] When it is determined that the first terminal device meets at least one of the following conditions, it is determined that the first terminal device leaves the first area and enters the second area: the distance to the first access network device is greater than the first distance threshold, and the distance to the first target access network device is less than the second distance threshold.

[0160] In some embodiments, a manner in which the uplink signal receiving device is switched from the first access network device to the first target access network device includes one of the following:

[0161] The first terminal device initiates a random access process on the first target access network device;

[0162] The first target access network device configures the uplink carrier of the first terminal device as a first target uplink carrier, and the first target uplink carrier is the uplink carrier of the first target access network device.

[0163] In the case where the first access network device is an anchor access network device, the first terminal device initiates a random access process on the first target access network device, so that the first terminal device performs uplink and downlink communication with the first target access network device.

[0164] In a case where the first target access network device is an anchor access network device, the first target access network device configures the uplink carrier of the first terminal device as the first target uplink carrier.

[0165] If the first target access network device does not have the carrier frequency for receiving the first uplink between the first terminal device and the first access network device, the first target access network device configures the uplink carrier of the first terminal device as the first target uplink carrier.

[0166] If the first target access network device has a carrier frequency for receiving the first uplink between the first terminal device and the first access network device, the first target access network device does not need to reconfigure the uplink carrier of the first terminal device.

[0167] Optionally, the first target access network device configures the first access network device to release resources used to receive uplink signals sent by the first terminal device.

[0168] Optionally, the first target access network device sends third configuration information to the first terminal device, and the third configuration information is used to instruct the first target access network device to receive the uplink signal sent by the first terminal device. By sending the third configuration information, the receiving device of the uplink signal of the first terminal device is changed from the first access network device to the first target access network device.

[0169] Taking the position change of the first terminal device as position change 2 as an example, the receiving device of the downlink signal is changed from the first target access network device to the second target access network device.

[0170] A first terminal device is located in a first area, with the first access network device as the receiving device for uplink signals and the first target access network device as the sending device for downlink signals. If the first terminal device moves from the first area to a third area, the first access network device as the receiving device for uplink signals remains unchanged, and the first access network device is used, while the second target access network device as the sending device for downlink signals of the first terminal device is changed from the first target access network device to the second target access network device. In this case, when the first terminal device is in the third area, the first access network device as the receiving device for uplink signals and the second target access network device as the sending device for downlink signals remain the same.

[0171] In one example, based on the scenario shown in Figure 9, as shown in Figure 12, the first area is the area where the coverage area 6011 overlaps with the coverage area 6032, and the third area is the area where the coverage area 6011 overlaps with the coverage area 6022. The terminal device 600 is located in the first area, then the uplink signal receiving device is the access network device 601, and the downlink signal sending device is the access network device 603. When the terminal device 600 moves from the first area to the third area, the downlink signal sending device of the terminal device 600 is changed from the access network device 603 to the access network device 602, then the uplink signal receiving device of the terminal device 600 is the access network device 601, and the downlink signal sending device is the access network device 602.

[0172] In some embodiments, a condition for determining that the first terminal device moves from the first area to the third area includes one of the following:

[0173] The signal strength of the downlink signal sent by the first target access network device and received by the first terminal device is lower than a third strength threshold;

[0174] The signal strength of the downlink signal sent by the second target access network device and received by the first terminal device is higher than the fourth strength threshold value.

[0175] Optionally, the first terminal device measures the signal strength of the downlink signal received from the first target access network device. When the signal strength of the received downlink signal is lower than a third strength threshold, it is determined that the distance between the position of the first terminal device and the first target access network device is greater than a third distance threshold corresponding to the third strength threshold.

[0176] Optionally, in a terminal measurement-based manner, the first terminal device measures the signal strength of the downlink signal received from the second target access network device. When the signal strength of the received downlink signal is higher than a fourth strength threshold, it is determined that the distance between the position of the first terminal device and the second target access network device is less than a fourth distance threshold corresponding to the fourth strength threshold.

[0177] When it is determined that the first terminal device meets at least one of the following conditions, it is determined that the first terminal device leaves the first area and enters the third area: the distance from the first target access network device is greater than the third distance threshold, and the distance from the second target access network device is less than the fourth distance threshold.

[0178] In some embodiments, the manner in which the sending device of the downlink signal is changed from the first target access network device to the second target access network device includes one of the following:

[0179] The first access network device configures the second target access network device to send a downlink signal to the first terminal device;

[0180] The first terminal device initiates a random access process on the second target access network device, and the second target access network device configures the first access network device to receive the uplink signal of the first terminal device.

[0181] When the first access network device is an anchor access network device, the anchor access network device of the first terminal device does not change, only the downlink signal non-transmitting device changes. The first access network device, as an anchor access network device, configures the second target access network device to send a downlink signal to the first terminal device.

[0182] Optionally, the first access network device instructs the second target access network device to send a downlink signal to the first terminal device.

[0183] Optionally, the first access network device indicates that the downlink carrier frequency of the first terminal device is the downlink carrier frequency of the second target access network device.

[0184] When the first target access network device is an anchor access network device, the first terminal device performs a random access procedure on the second target access network device, causing the anchor access network device of the first terminal device to change from the first target access network device to the second target access network device. When the second target access network device is an anchor access network device, the second target access network device is configured as a receiving device for uplink signals and a transmitting device for downlink signals of the first terminal device. At this time, the second target access network device configures the first access network device to receive the uplink signal sent by the first terminal device.

[0185] Optionally, the second target access network device configures the first target access network device to release resources used to send downlink signals to the first terminal device.

[0186] Optionally, the first access network device sends fourth configuration information to the second target terminal device, and the fourth configuration information is used to instruct the second target access network device to send a downlink signal to the first terminal device. By sending the fourth configuration information, the sending device of the downlink signal of the first terminal device is changed from the first target access network device to the second target access network device.

[0187] The wireless communication method provided in the embodiment of the present application performs mobility management on a first terminal device on a wireless communication network composed of a first access network device and one or more second access network devices, ensuring that the first terminal device can perform normal location changes when the first access network device reduces the transmission power.

[0188] In some embodiments, the wireless communication method provided in the embodiments of the present application further includes:

[0189] The first access network device receives third indication information sent by a third target access network device, where the third target access network device is any second access network device among the at least one second access network device, and the third indication information is used to indicate reducing the coverage area of ​​the third target access network device and / or the third indication information is used to indicate increasing the transmission power of the first access network device.

[0190] At this time, the third target access network device sends a third indication message to the first access network device, and the third indication message is used to indicate reducing the coverage area of ​​the third target access network device and / or the third indication message is used to indicate increasing the transmission power of the first access network device.

[0191] In the embodiment of the present application, when a second access network device meets at least one of the following conditions, the third indication information is sent:

[0192] The second amount is greater than a third amount threshold;

[0193] The second throughput is greater than a third throughput threshold.

[0194] In a case where the third target access network device sends the third indication information, the third target access network device reduces the coverage area.

[0195] When the first access network device receives the third indication information, the first access network device increases the transmission power. Optionally, the first access network device turns on the transmission function.

[0196] In some embodiments, the wireless communication method provided in the embodiments of the present application further includes:

[0197] The fourth indication information sent by the first access network device to the fourth target access network device, the fourth indication information is used to indicate the reduction of the coverage area of ​​the fourth target access network device and / or to indicate the increase of the transmission power of the first access network device, and the fourth target access network device is the second access network device among the at least one second access network device except the third target access network device.

[0198] At this time, the fourth target access network device receives the fourth indication information sent by the first access network device, and the fourth indication information is used to indicate reducing the coverage area of ​​the fourth target access network device and / or to indicate increasing the transmission power of the first access network device.

[0199] When the fourth target access network device receives the fourth indication information, the fourth target access network device reduces the coverage area.

[0200] The manner in which the third target access network device or the fourth target access network device reduces the coverage area includes at least one of the following:

[0201] Improve transmission bandwidth;

[0202] Increase the modulation order of the modulation method;

[0203] Reduce the transmit power.

[0204] In the embodiment of the present application, the manner in which the second access network device reduces the coverage area may be determined based on the manner in which the coverage area is expanded.

[0205] The wireless communication method provided in the embodiment of the present application initiates exit from the coverage expansion mode when an access network device monitors that the number of users in the cell with expanded coverage increases to a certain threshold or the overall throughput increases to a certain threshold, activates the transmission function of the first access network device, and restores the coverage area of ​​the first access network device and the coverage area of ​​the second access network device.

[0206] Below, taking the access network device as gNB as an example, the wireless communication method provided in the embodiment of the present application is further explained.

[0207] A base station's power consumption for transmission and reception depends on a variety of factors, including transmit power, operating bandwidth, modulation type, multi-carrier operation, and transmit or receive time. Lower transmit power, smaller bandwidth, lower modulation type, single-carrier operation, and shorter transmit or receive times all contribute to lower base station power consumption. This embodiment of the present application will describe energy-saving solutions for multi-base station collaboration from the perspective of base station transmission.

[0208] As shown in Figure 13, gNB1 and gNB2 are base stations covering adjacent cells, with gNB1 covering area 1 and gNB2 covering area 2. A base station's coverage area is affected by various factors, such as transmit power, bandwidth, and modulation. By reducing the transmit bandwidth and modulation, a base station can expand its coverage area while maintaining the same transmit power. Of course, this limits the peak rate within the cell. In this embodiment, by expanding the coverage area of ​​a single base station, base station power consumption is reduced, enabling coverage of all areas with only a few base stations.

[0209] Scenario 1: As shown in Figure 14, gNB2 covers gNB1's coverage area 1 by expanding its coverage area to the expanded coverage area 1.

[0210] In Figure 14, gNB1 can turn off the transmission function.

[0211] Disabling gNB1's transmission function and enabling gNB2's coverage expansion function requires careful consideration. While this approach can save base station power, it also reduces overall throughput. Therefore, this approach to reducing base station power consumption is not recommended for cells with high-speed services.

[0212] gNB1 can trigger the disabling of gNB1's transmission function and the enabling of gNB2's coverage expansion function. When gNB1 detects that the total number of online terminals in its cell (area 1) falls below a certain threshold, or the overall throughput falls below a certain threshold, gNB1 can negotiate with gNB2 to disable gNB1's transmission function and enable gNB2's coverage expansion function. Online terminals include connected and / or inactive terminals.

[0213] The consultation process includes:

[0214] S11. gNB1 initiates a request to shut down transmission and requests gNB2 to expand its coverage area.

[0215] S12. gNB2 sends back a response message.

[0216] The response message indicates whether to allow or not to shut down gNB1 transmission, and whether to agree or not to expand the gNB2 coverage area.

[0217] Whether gNB2 agrees to expand its coverage area is determined by the service conditions of the terminals within the coverage area of ​​gNB2, i.e., Area 2. When there is no high throughput demand and / or the number of online terminal devices in Area 2 is small (the judgment threshold and method can be similar to gNB1), gNB2 will agree to expand its coverage area.

[0218] The gNB2 can expand its coverage area by keeping its own transmit power unchanged (for example, by reducing the transmit bandwidth, lowering the modulation method, etc.), or by increasing the transmit power.

[0219] S13. gNB1 turns off the transmission function.

[0220] S14 and gNB2 expand coverage area.

[0221] After gNB2 expands the coverage area, area 3 covers area 1.

[0222] S15. gNB2 activates gNB1 to resume transmission.

[0223] After gNB2 detects that the number of online terminals in area 3 has increased to a certain threshold or the overall throughput has increased to a certain threshold, gNB2 initiates exit from the coverage area expansion mode to activate gNB1 to resume transmission so that gNB1 covers area 1 and gNB2 covers area 2.

[0224] The transmit power of terminals in coverage area 1 is usually limited, making it difficult for gNB2 to receive and demodulate their transmitted signals. Therefore, the following methods can be used to improve the reception function of gNB1:

[0225] Method 1: gNB1 retains the ability to receive and demodulate the transmitted signals of terminal devices in Area 1.

[0226] As shown in Figure 15, gNB1 retains the function of receiving and demodulating the transmitted signal of terminal 1 in area 1. At this time, the downlink signal of terminal 1 will be sent by gNB2 through the downlink DL, and the uplink signal of terminal 1 will be received by gNB1 through the uplink UL1. gNB1 demodulates the received uplink signal, and the uplink signal of terminal 2 under gNB2 will be received by gNB2 through UL2.

[0227] Method 2: gNB1 retains the function of receiving the transmitted signals of terminal devices in area 1, and the demodulation function is performed by gNB2.

[0228] As shown in Figure 16, gNB1 receives the transmitted signal from the terminal device in area 1 and transparently forwards it to gNB2, which demodulates it.

[0229] After gNB2 expands its downlink coverage, it can now cover Area 1. However, Terminal 1's transmit power is relatively low, making it difficult for gNB2 to receive and demodulate it. Therefore, as shown in Figure 13, gNB1 receives Terminal 1's uplink signal and forwards it to gNB2, effectively expanding Terminal 1's uplink coverage area.

[0230] The air interface between terminal 1 and gNB1 uses uplink (UL) 1. gNB1 forwards terminal 1's uplink signal either over the air interface or through an inter-base station interface. The inter-base station interface can be an Xn interface.

[0231] The carrier frequency of UL1, i.e., the uplink carrier frequency of terminal 1, can be the same as or different from the uplink carrier frequency of gNB2.

[0232] Terminal 1's uplink carrier frequency is the same as gNB2's, making gNB1 transparent to Terminal 1. After gNB1 and gNB2 complete negotiation to disable gNB1's transmission function and expand gNB2's coverage area, gNB1 becomes an uplink relay base station for gNB2. Terminal 1 accesses gNB2 through gNB1 and ultimately maintains uplink and downlink connections with gNB2.

[0233] The uplink carrier frequency of terminal 1 is different from that of gNB2. gNB1 can transparently forward the uplink signal of terminal 1 to gNB2. In this case, gNB2 is required to have the ability to receive and demodulate the UL1 frequency.

[0234] If gNB2 does not have the capability to receive and demodulate the carrier frequency of UL1, gNB1 needs to convert the frequency of the received uplink signal to the uplink frequency of gNB2.

[0235] When gNB1's reception and gNB2's transmission are combined to provide uplink and downlink services to UE1, the relationship between gNB1 and gNB2 can be one of the following:

[0236] 1. gNB1 serves as the anchor base station for terminal 1. gNB1 configures gNB2 as the downlink carrier base station for terminal 1. All downlink signals from terminal 1 are transmitted or forwarded by gNB2, and all uplink signals are received by gNB1.

[0237] The anchor base station is responsible for controlling the signaling connection between the terminal and the base station.

[0238] In this relationship, when UE 1 moves outside of Area 1 within Area 3, where gNB2 has expanded its coverage, it triggers a handover of UE 1's anchor base station from gNB1 to gNB2. UE 1 then initiates an uplink random access on gNB2, which then provides both uplink and downlink services.

[0239] 2. gNB2 serves as the anchor base station for terminal 1. gNB2 configures gNB1 as the uplink carrier base station for terminal 1. All downlink signals of terminal 1 are transmitted by gNB2, and all uplink signals are received by gNB1.

[0240] In this manner, when Terminal 1 moves to an area outside of Area 1 within Area 3, anchor base station handover for Terminal 1 will not be triggered. However, since gNB2 will subsequently provide uplink and downlink services, if gNB2 does not support the carrier frequency of UL1, gNB2 needs to reconfigure Terminal 1's uplink carrier to switch from gNB1 to gNB2.

[0241] When UE 1 moves from Area 1 to an area outside Area 1 in Area 3, mobility management is triggered, causing gNB 1 to switch its uplink service to gNB 2. The method for switching UE 1's uplink service from gNB 1 to gNB 2 includes:

[0242] Switching mode 1: Base station indication

[0243] When the anchor base station is gNB1, gNB1 knows the transmit power status of UE1 through the power headroom (PHR) reported by UE1. When the transmit power of UE1 is insufficient to support uplink services, for example, the SINR of the uplink signal received by gNB1 is too low, gNB1 will instruct UE1 to initiate random access on gNB2, and gNB2 will perform uplink and downlink service transmission.

[0244] When the anchor base station is gNB2, gNB1 can learn about its transmit power through the PHR reported by UE1. When the transmit power of UE1 is insufficient to support uplink services, for example, if the SINR of the uplink signal received by gNB1 is too low, gNB1 will instruct gNB2 to reconfigure the uplink carrier of UE1, and then gNB2 will transmit uplink and downlink services.

[0245] Switching mode 2: Terminal measurement

[0246] gNB1 (the anchor base station is gNB1) or gNB2 (the anchor base station is gNB2) configures terminal 1 to measure the downlink signal strength of gNB2. When the downlink signal strength exceeds a certain threshold, terminal 1 initiates random access on gNB2 (when the anchor base station is gNB1) or gNB2 reconfigures the uplink carrier of terminal 1 (when the anchor base station is gNB2), and gNB2 performs uplink and downlink service transmission.

[0247] Scenario 2: Multiple base stations expand coverage of gNB1 region 1

[0248] As shown in Figure 17, gNB2 and gNB3 extend coverage of gNB1's coverage area 1 through their expanded coverage areas, namely, expanded coverage area 2 and expanded coverage area 3. A terminal in coverage area 1 may be located in either gNB2's expanded coverage area 2 or gNB3's expanded coverage area 3. Compared to scenario 1, where gNB1 consistently negotiates, configures, and forwards traffic with gNB2, in Figure 17, gNB1 determines whether the terminal is located in gNB2's expanded coverage area or gNB3's expanded coverage area.

[0249] The negotiation process is as follows:

[0250] S21. When gNB1 detects that the number of online terminals in area 1 is lower than a certain threshold or the overall throughput in the cell is lower than a certain threshold, gNB1 negotiates with gNB2 and gNB3 to enable gNB1 to disable its transmission function and gNB2 and gNB3 to expand the downlink coverage area.

[0251] S22, gNB2, and gNB3 expand the downlink coverage area. gNB1 configures Terminal 1 to measure the downlink signal strength of neighboring gNB2 and gNB3 respectively.

[0252] S23: The terminal reports the measured downlink signal strengths of gNB2 and gNB3. Based on this, gNB1 determines that terminal 1 is located in the gNB's expanded coverage area. As shown in Figure 18, terminal 1 is in the gNB3's expanded coverage area. Terminal 1's uplink signals are sent to gNB1, and terminal 1 receives downlink signals from gNB3. The content described in Scenario 1 applies to terminal 1, gNB1, and gNB3.

[0253] When Terminal 1 moves from the expanded coverage area of ​​gNB3 to the expanded coverage area of ​​gNB2, if gNB1 adopts a pure reception mode or a reception and demodulation mode, then, if gNB1 is the anchor base station, the downlink carrier base station will be reconfigured to the downlink carrier of gNB2; if gNB3 is the anchor base station, a handover process will be initiated to switch the anchor base station of Terminal 1 from gNB3 to gNB2.

[0254] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will no longer describe the various possible combinations separately. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in each embodiment described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the scope of protection of the present application.

[0255] It should also be understood that in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply a precedence in the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data, where "downlink" is used to indicate the first direction of transmission of signals or data from a site to a user equipment in a cell, "uplink" is used to indicate the second direction of transmission of signals or data from a user equipment in a cell to a site, and "sidelink" is used to indicate the third direction of transmission of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. Specifically, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0256] FIG19 is a first structural diagram of a wireless communication device according to an embodiment of the present application, which is applied to a first access network device. As shown in FIG19 , the wireless communication device 1900 includes:

[0257] The first communication unit 1901 is configured to send first indication information to at least one second access network device, where the first indication information is used to request expansion of the coverage area of ​​the second access network device and / or to request reduction of the transmit power of the first access network device;

[0258] The first control unit 1902 is configured to reduce the transmission power of the first access network device upon receiving second indication information sent by each second access network device among the at least one second access network device, wherein the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

[0259] In some embodiments, the sending condition of the first indication information includes at least one of the following:

[0260] The first number is less than a first number threshold, where the first number is the number of terminal devices in a connected state and / or in an inactive state under the first access network device;

[0261] The first throughput is less than a first throughput threshold, and the first throughput is a service throughput of the first access network device.

[0262] In some embodiments, a first terminal device sends an uplink signal to the first access network device and receives a downlink signal sent by a first target access network device. The first terminal device is located in the first coverage area before the first access network device reduces the transmission power and is located in the first area after the first access network device reduces the transmission power. The first coverage area is the coverage area before the first access network device reduces the transmission power. The first area is the area where the second coverage area after the first target access network device expands the coverage area overlaps with the first coverage area. The first target access network device is one of the at least one second access network devices.

[0263] In some embodiments, the first target access network device is the second access network device among the at least one second access network device, where the signal strength of the measurement signal received by the first terminal device is the strongest.

[0264] In some embodiments, the anchor access network device of the first terminal device is the first access network device or the first target access network device.

[0265] In some embodiments, if the anchor access network device of the first terminal device is the first access network device, the apparatus 1900 further includes:

[0266] The first configuration unit is configured to configure the first target access network device to send a downlink signal to the first terminal device.

[0267] In some embodiments, if the anchor access network device of the first terminal device is the first target access network device, the apparatus 1900 further includes:

[0268] The second configuration unit is configured to be configured by the first target access network device to receive the uplink signal sent by the first terminal device.

[0269] In some embodiments, the uplink signal is demodulated by the first access network device or the first target access network device.

[0270] In some embodiments, when the uplink signal is demodulated by the first target access network device, the uplink signal is forwarded by the first access network device to the first target access network device.

[0271] In some embodiments, the interface used by the uplink signal to be forwarded from the first access network device to the first target access network device includes at least one of the following:

[0272] An air interface and a first interface, where the first interface is an interface between the first access network device and the first target access network device.

[0273] In some embodiments, when the uplink signal is forwarded via the air interface, at least one of the following processes is performed on the uplink signal before the uplink signal is forwarded:

[0274] Power amplification;

[0275] Frequency conversion.

[0276] In some embodiments, if the first terminal device moves from the first area to the second area, the receiving device of the uplink signal changes from the first access network device to the first target access network device, and the second area is an area in the second coverage area that does not overlap with the first coverage area.

[0277] In some embodiments, a condition for determining that the first terminal device moves from the first area to the second area includes one of the following:

[0278] The signal strength of the uplink signal received by the first access network device is lower than a first strength threshold;

[0279] The signal strength of the downlink signal received by the first terminal device is higher than a second strength threshold.

[0280] In some embodiments, a manner in which the receiving device of the uplink signal is changed from the first access network device to the first target access network device includes one of the following:

[0281] The first terminal device initiates a random access process on the first target access network device;

[0282] The first target access network device configures the uplink carrier of the first terminal device as a first target uplink carrier, and the first target uplink carrier is the uplink carrier of the first target access network device.

[0283] In some embodiments, if the first terminal device moves from the first area to the third area, the sending device of the downlink signal is changed from the first target access network device to the second target access network device, the first area is the area where the first coverage area overlaps with the second coverage area, the third area is the area where the first coverage area overlaps with the third coverage area, the second coverage area is the coverage area after the first target access network device expands its coverage area, the third coverage area is the coverage area after the second target access network device expands its coverage area, and the second target access network device is a second access network device among the at least one second access network device that is different from the first target access network device.

[0284] In some embodiments, a condition for determining that the first terminal device moves from the first area to the third area includes one of the following:

[0285] The signal strength of the downlink signal sent by the first target access network device and received by the first terminal device is lower than a third strength threshold;

[0286] The signal strength of the downlink signal sent by the second target access network device and received by the first terminal device is higher than the fourth strength threshold value.

[0287] In some embodiments, the manner in which the sending device of the downlink signal is changed from the first target access network device to the second target access network device includes one of the following:

[0288] The first access network device configures the second target access network device to send a downlink signal to the first terminal device;

[0289] The first terminal device initiates a random access process on the second target access network device, and the second target access network device configures the first access network device to receive the uplink signal of the first terminal device.

[0290] In some embodiments, the first communication unit 1901 is further configured to:

[0291] Receive third indication information sent by a third target access network device, where the third target access network device is any second access network device among the at least one second access network device, and the third indication information is used to indicate reducing the coverage area of ​​the third target access network device and / or the third indication information is used to indicate increasing the transmission power of the first access network device.

[0292] In some embodiments, the first communication unit 1901 is further configured to:

[0293] Send fourth indication information to the fourth target access network device, wherein the fourth indication information is used to indicate reducing the coverage area of ​​the fourth target access network device and / or to indicate increasing the transmission power of the first access network device. The fourth target access network device is the second access network device among the at least one second access network device except the third target access network device.

[0294] FIG20 is a second schematic diagram of the structure of a wireless communication device provided in an embodiment of the present application, which is applied to a second access network device. As shown in FIG20 , the wireless communication device 2000 includes:

[0295] The second communication unit 2001 is configured to receive first indication information sent by a first access network device, where the first indication information is used to request expansion of the coverage area of ​​the second access network device and / or to request reduction of the transmit power of the first access network device;

[0296] The second control unit 2002 is configured to expand the coverage area when sending second indication information to the first access network device, where the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

[0297] In some embodiments, the sending condition of the second indication information includes at least one of the following:

[0298] The second number is less than a second number threshold, where the second number is the number of terminal devices in a connected state and / or in an inactive state under the second access network device;

[0299] The second throughput is less than a second throughput threshold, and the second throughput is a service throughput of the second access network device.

[0300] In some embodiments, the second access network device expands the coverage area in at least one of the following ways:

[0301] Reduce the transmission bandwidth;

[0302] Reduce the modulation order of the modulation method;

[0303] Increase the transmit power.

[0304] In some embodiments, the second access network device is the first target access network device, the first terminal device sends an uplink signal to the first access network device, and receives a downlink signal sent by the first target access network device. The first terminal device is located in the first coverage area before the first access network device reduces the transmission power and is located in the first area after the first access network device reduces the transmission power. The first coverage area is the coverage area before the first access network device reduces the transmission power, and the first area is the area where the second coverage area after the first target access network device expands the coverage area overlaps with the first coverage area.

[0305] In some embodiments, the first target access network device is a second access network device having the strongest signal strength of the measurement signal received by the first terminal device among at least one second access network device for expanding the coverage area.

[0306] In some embodiments, the anchor access network device of the first terminal device is the first access network device or the first target access network device.

[0307] In some embodiments, the apparatus 2000 further includes:

[0308] The third configuration unit is configured to, if the anchor access network device of the first terminal device is the first access network device, be configured by the first access network device to send a downlink signal to the first terminal device.

[0309] In some embodiments, the apparatus 2000 further includes:

[0310] The fourth configuration unit is configured to configure the first access network device to receive the uplink signal sent by the first terminal device if the anchor access network device of the first terminal device is the first target access network device.

[0311] In some embodiments, the uplink signal is demodulated by the first access network device or the second access network device.

[0312] In some embodiments, when the uplink signal is demodulated by the second access network device, the uplink signal is forwarded by the first access network device to the first target access network device.

[0313] In some embodiments, the interface used by the uplink signal to be forwarded from the first access network device to the first target access network device includes at least one of the following:

[0314] An air interface and a first interface, where the first interface is an interface between the first access network device and the first target access network device.

[0315] In some embodiments, when the uplink signal is forwarded via the air interface, at least one of the following processes is performed on the uplink signal before the uplink signal is forwarded:

[0316] Power amplification;

[0317] Frequency conversion.

[0318] In some embodiments, if the first terminal device moves from the first area to the second area, the receiving device of the uplink signal changes from the first access network device to the first target access network device, and the second area is an area in the second coverage area that does not overlap with the first coverage area.

[0319] In some embodiments, a condition for determining that the first terminal device moves from the first area to the second area includes one of the following:

[0320] The signal strength of the uplink signal received by the first access network device is lower than a first strength threshold;

[0321] The signal strength of the downlink signal received by the first terminal device is higher than a second strength threshold.

[0322] In some embodiments, a manner in which the receiving device of the uplink signal is changed from the first access network device to the first target access network device includes one of the following:

[0323] The first terminal device initiates a random access process on the second access network device;

[0324] The first target access network device configures the uplink carrier of the first terminal device as a first target uplink carrier, and the first target uplink carrier is the uplink carrier of the first target access network device.

[0325] In some embodiments, the second access network device is the first target access network device or the second target access network device, the first terminal device moves from the first area to the third area, the sending device of the downlink signal is changed from the first target access network device to the second target access network device, the first area is the area where the first coverage area and the second coverage area overlap, the third area is the area where the first coverage area and the third coverage area overlap, the first coverage area is the coverage area before the first access network device reduces the transmission power, the second coverage area is the coverage area after the first target access network device expands the coverage area, and the third coverage area is the coverage area after the second target access network device expands the coverage area.

[0326] In some embodiments, a condition for determining that the first terminal device moves from the first area to the third area includes one of the following:

[0327] The strength of the downlink signal received by the first terminal device is lower than a third strength threshold;

[0328] The strength of the downlink signal sent by the second target access network device and received by the first terminal device is higher than the fourth strength threshold value.

[0329] In some embodiments, a manner in which the sending device of the downlink signal is changed from the first target access network device to the second target access network device includes one of the following:

[0330] The first access network device configures the second target access network device to send a downlink signal to the first terminal device;

[0331] The first terminal device initiates a random access process on the second target access network device, and the second target access network device configures the first access network device to receive the uplink signal of the first terminal device.

[0332] In some embodiments, the second access network device is a third target access network device, and the second communication unit 2001 is further configured to:

[0333] Send third indication information to the first access network device, where the third indication information is used to instruct to reduce the coverage area of ​​the third target access network device and / or the third indication information is used to instruct to increase the transmission power of the first access network device.

[0334] In some embodiments, the second access network device is a fourth target access network device, and the second communication unit 2001 is further configured to:

[0335] Receive fourth indication information sent by the first access network device, where the fourth indication information is used to instruct to reduce the coverage area of ​​the fourth target access network device and / or to instruct to increase the transmission power of the first access network device.

[0336] Those skilled in the art should understand that the relevant description of the above-mentioned wireless communication device in the embodiment of the present application can be understood with reference to the relevant description of the wireless communication method in the embodiment of the present application.

[0337] Figure 21 is a schematic diagram of a communication device 2100 provided in an embodiment of the present application. The communication device can be a terminal device or a network device, wherein the network device may include an access network device. The communication device 2100 shown in Figure 21 includes a processor 2110, which can call and execute a computer program from a memory to implement the method in the embodiment of the present application.

[0338] Optionally, as shown in FIG21 , the communication device 2100 may further include a memory 2120. The processor 2110 may call and execute a computer program from the memory 2120 to implement the method in the embodiment of the present application.

[0339] The memory 2120 may be a separate device independent of the processor 2110 , or may be integrated into the processor 2110 .

[0340] Optionally, as shown in FIG21 , the communication device 2100 may further include a transceiver 2130 , and the processor 2110 may control the transceiver 2130 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0341] The transceiver 2130 may include a transmitter and a receiver. The transceiver 2130 may further include an antenna, and the number of antennas may be one or more.

[0342] Optionally, the communication device 2100 may specifically be a network device in an embodiment of the present application, and the communication device 2100 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0343] Optionally, the communication device 2100 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 2100 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0344] Figure 22 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 2200 shown in Figure 22 includes a processor 2210, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0345] Optionally, as shown in FIG22 , the chip 2200 may further include a memory 2220. The processor 2210 may call and execute a computer program from the memory 2220 to implement the method in the embodiment of the present application.

[0346] The memory 2220 may be a separate device independent of the processor 2210 , or may be integrated into the processor 2210 .

[0347] Optionally, the chip 2200 may further include an input interface 2230. The processor 2210 may control the input interface 2230 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0348] Optionally, the chip 2200 may further include an output interface 2240. The processor 2210 may control the output interface 2240 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0349] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0350] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0351] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0352] FIG23 is a schematic block diagram of a communication system 2300 provided in an embodiment of the present application. As shown in FIG23 , the communication system 2300 includes a terminal device 2310 and a network device 2320 .

[0353] Among them, the terminal device 2310 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 2320 can be used to implement the corresponding functions implemented by the access network device in the above method. For the sake of brevity, they will not be repeated here.

[0354] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0355] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0356] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0357] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0358] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0359] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0360] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0361] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0362] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0363] The embodiment of the present application also provides a computer program.

[0364] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not described here.

[0365] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0366] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0367] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0368] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0369] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of the solution of this embodiment according to actual needs.

[0370] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0371] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0372] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, the method comprising: The first access network device sends first indication information to at least one second access network device, where the first indication information is used to request expansion of the coverage area of ​​the second access network device and / or to request reduction of the transmit power of the first access network device; When the first access network device receives the second indication information sent by each second access network device of the at least one second access network device, the transmission power of the first access network device is reduced, and the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

2. The method according to claim 1, wherein The sending condition of the first indication information includes at least one of the following: The first number is less than a first number threshold, where the first number is the number of terminal devices in a connected state and / or in an inactive state under the first access network device; The first throughput is less than a first throughput threshold, and the first throughput is a service throughput of the first access network device.

3. The method according to claim 1 or 2, wherein: A first terminal device sends an uplink signal to the first access network device and receives a downlink signal sent by a first target access network device. The first terminal device is located in the first coverage area before the first access network device reduces the transmission power and is located in the first area after the first access network device reduces the transmission power. The first coverage area is the coverage area before the first access network device reduces the transmission power. The first area is the area where the second coverage area after the first target access network device expands the coverage area overlaps with the first coverage area. The first target access network device is one of the at least one second access network devices.

4. The method according to claim 3, wherein: The first target access network device is the second access network device among the at least one second access network device, wherein the signal strength of the measurement signal received by the first terminal device is the strongest.

5. The method according to claim 3 or 4, wherein: The anchor access network device of the first terminal device is the first access network device or the first target access network device.

6. The method according to claim 5, wherein: If the anchor access network device of the first terminal device is the first access network device, the method further includes: The first access network device configures the first target access network device to send a downlink signal to the first terminal device.

7. The method according to claim 5, wherein: If the anchor access network device of the first terminal device is the first target access network device, the method further includes: The first access network device is configured by the first target access network device to receive an uplink signal sent by the first terminal device.

8. The method according to any one of claims 3 to 7, wherein The uplink signal is demodulated by the first access network device or the first target access network device.

9. The method according to claim 8, wherein In a case where the uplink signal is demodulated by the first target access network device, the uplink signal is forwarded by the first access network device to the first target access network device.

10. The method according to claim 9, wherein: The interface used by which the uplink signal is forwarded from the first access network device to the first target access network device includes at least one of the following: An air interface and a first interface, where the first interface is an interface between the first access network device and the first target access network device.

11. The method according to claim 9, wherein When the uplink signal is forwarded through the air interface, at least one of the following processes is performed on the uplink signal before the uplink signal is forwarded: Power amplification; Frequency conversion.

12. The method according to any one of claims 3 to 11, wherein If the first terminal device moves from the first area to the second area, the receiving device of the uplink signal changes from the first access network device to the first target access network device, and the second area is an area in the second coverage area that does not overlap with the first coverage area.

13. The method according to claim 12, wherein: A condition for determining that the first terminal device moves from the first area to the second area includes one of the following: The signal strength of the uplink signal received by the first access network device is lower than a first strength threshold; The signal strength of the downlink signal received by the first terminal device is higher than a second strength threshold.

14. The method according to claim 12 or 13, wherein: The manner in which the receiving device of the uplink signal is changed from the first access network device to the first target access network device includes one of the following: The first terminal device initiates a random access process on the first target access network device; The first target access network device configures the uplink carrier of the first terminal device as a first target uplink carrier, and the first target uplink carrier is the uplink carrier of the first target access network device.

15. The method according to any one of claims 3 to 14, wherein If the first terminal device moves from the first area to the third area, the sending device of the downlink signal is changed from the first target access network device to the second target access network device, the first area is the area where the first coverage area overlaps with the second coverage area, the third area is the area where the first coverage area overlaps with the third coverage area, the second coverage area is the coverage area after the coverage area of ​​the first target access network device is expanded, the third coverage area is the coverage area after the coverage area of ​​the second target access network device is expanded, and the second target access network device is the second access network device among the at least one second access network device that is different from the first target access network device.

16. The method according to claim 15, wherein A condition for determining that the first terminal device moves from the first area to the third area includes one of the following: The signal strength of the downlink signal sent by the first target access network device and received by the first terminal device is lower than a third strength threshold; The signal strength of the downlink signal sent by the second target access network device and received by the first terminal device is higher than the fourth strength threshold value.

17. The method according to claim 15 or 16, wherein The manner in which the sending device of the downlink signal is changed from the first target access network device to the second target access network device includes one of the following: The first access network device configures the second target access network device to send a downlink signal to the first terminal device; The first terminal device initiates a random access process on the second target access network device, and the second target access network device configures the first access network device to receive the uplink signal of the first terminal device.

18. The method according to any one of claims 1 to 17, wherein The method further comprises: The first access network device receives third indication information sent by a third target access network device, where the third target access network device is any second access network device among the at least one second access network device, and the third indication information is used to indicate reducing the coverage area of ​​the third target access network device and / or the third indication information is used to indicate increasing the transmission power of the first access network device.

19. The method according to any one of claims 18, wherein The method further comprises: The first access network device sends fourth indication information to the fourth target access network device, and the fourth indication information is used to indicate the reduction of the coverage area of ​​the fourth target access network device and / or to indicate the increase of the transmission power of the first access network device. The fourth target access network device is the second access network device among the at least one second access network device except the third target access network device.

20. A wireless communication method, the method comprising: The second access network device receives first indication information sent by the first access network device, where the first indication information is used to request expansion of the coverage area of ​​the second access network device and / or to request reduction of the transmit power of the first access network device; When the second access network device sends second indication information to the first access network device, the coverage area is expanded, and the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

21. The method according to claim 20, wherein The sending condition of the second indication information includes at least one of the following: The second number is less than a second number threshold, where the second number is the number of terminal devices in a connected state and / or in an inactive state under the second access network device; The second throughput is less than a second throughput threshold, and the second throughput is a service throughput of the second access network device.

22. The method according to claim 20 or 21, wherein The manner in which the second access network device expands the coverage area includes at least one of the following: Reduce the transmission bandwidth; Reduce the modulation order of the modulation method; Increase the transmit power.

23. The method according to any one of claims 20 to 22, wherein The second access network device is the first target access network device, the first terminal device sends an uplink signal to the first access network device, and receives a downlink signal sent by the first target access network device. The first terminal device is located in the first coverage area before the first access network device reduces the transmission power and is located in the first area after the first access network device reduces the transmission power. The first coverage area is the coverage area before the first access network device reduces the transmission power, and the first area is the area where the second coverage area after the first target access network device expands the coverage area overlaps with the first coverage area.

24. The method according to claim 23, wherein The first target access network device is a second access network device having the strongest signal strength of the measurement signal received by the first terminal device among at least one second access network device with an expanded coverage area.

25. The method according to claim 23, wherein The anchor access network device of the first terminal device is the first access network device or the first target access network device.

26. The method according to claim 25, wherein If the anchor access network device of the first terminal device is the first access network device, the method further includes: The first target access network device is configured by the first access network device to send a downlink signal to the first terminal device.

27. The method according to claim 25, wherein If the anchor access network device of the first terminal device is the first target access network device, the method further includes: The first target access network device configures the first access network device to receive an uplink signal sent by the first terminal device.

28. The method according to any one of claims 23 to 27, wherein The uplink signal is demodulated by the first access network device or the second access network device.

29. The method according to claim 28, wherein In a case where the uplink signal is demodulated by the second access network device, the uplink signal is forwarded by the first access network device to the first target access network device.

30. The method according to claim 29, wherein The interface used by which the uplink signal is forwarded from the first access network device to the first target access network device includes at least one of the following: An air interface and a first interface, where the first interface is an interface between the first access network device and the first target access network device.

31. The method according to claim 29, wherein When the uplink signal is forwarded through the air interface, at least one of the following processes is performed on the uplink signal before the uplink signal is forwarded: Power amplification; Frequency conversion.

32. The method according to any one of claims 23 to 31, wherein If the first terminal device moves from the first area to the second area, the receiving device of the uplink signal changes from the first access network device to the first target access network device, and the second area is an area in the second coverage area that does not overlap with the first coverage area.

33. The method according to claim 32, wherein A condition for determining that the first terminal device moves from the first area to the second area includes one of the following: The signal strength of the uplink signal received by the first access network device is lower than a first strength threshold; The signal strength of the downlink signal received by the first terminal device is higher than a second strength threshold.

34. The method according to claim 32 or 33, wherein The manner in which the receiving device of the uplink signal is changed from the first access network device to the first target access network device includes one of the following: The first terminal device initiates a random access process on the second access network device; The first target access network device configures the uplink carrier of the first terminal device as a first target uplink carrier, and the first target uplink carrier is the uplink carrier of the first target access network device.

35. The method according to any one of claims 20 to 34, wherein The second access network device is the first target access network device or the second target access network device, the first terminal device moves from the first area to the third area, the sending device of the downlink signal is changed from the first target access network device to the second target access network device, the first area is the area where the first coverage area and the second coverage area overlap, the third area is the area where the first coverage area and the third coverage area overlap, the first coverage area is the coverage area before the first access network device reduces the transmission power, the second coverage area is the coverage area after the first target access network device expands the coverage area, and the third coverage area is the coverage area after the second target access network device expands the coverage area.

36. The method according to claim 35, wherein A condition for determining that the first terminal device moves from the first area to the third area includes one of the following: The strength of the downlink signal received by the first terminal device is lower than a third strength threshold; The strength of the downlink signal sent by the second target access network device and received by the first terminal device is higher than the fourth strength threshold value.

37. The method according to claim 35 or 36, wherein The manner in which the sending device of the downlink signal is changed from the first target access network device to the second target access network device includes one of the following: The first access network device configures the second target access network device to send a downlink signal to the first terminal device; The first terminal device initiates a random access process on the second target access network device, and the second target access network device configures the first access network device to receive the uplink signal of the first terminal device.

38. The method according to any one of claims 20 to 37, wherein The second access network device is a third target access network device, and the method further includes: The third target access network device sends third indication information to the first access network device, where the third indication information is used to indicate reducing the coverage area of ​​the third target access network device and / or the third indication information is used to indicate increasing the transmission power of the first access network device.

39. The method according to any one of claims 20 to 37, wherein The second access network device is a fourth target access network device, and the method further includes: The fourth target access network device receives fourth indication information sent by the first access network device, where the fourth indication information is used to instruct the reduction of the coverage area of ​​the fourth target access network device and / or to instruct the increase of the transmission power of the first access network device.

40. A wireless communication device comprising: a first communication unit, configured to send first indication information to at least one second access network device, where the first indication information is used to request expansion of the coverage area of ​​the second access network device and / or to request reduction of the transmit power of the first access network device; The first control unit is configured to reduce the transmission power of the first access network device upon receiving second indication information sent by each second access network device among the at least one second access network device, wherein the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

41. A wireless communication device comprising: a second communication unit configured to receive first indication information sent by a first access network device, where the first indication information is used to request expansion of a coverage area of ​​the second access network device and / or to request reduction of a transmit power of the first access network device; The second control unit is configured to expand the coverage area when sending second indication information to the first access network device, and the second indication information is used to indicate the expansion of the coverage area of ​​the second access network device and / or to indicate the reduction of the transmission power of the first access network device.

42. A communication device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory, and to execute the method according to any one of claims 1 to 19, or to execute the method according to any one of claims 20 to 39.

43. A chip comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 19, or executes the method according to any one of claims 20 to 39.

44. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 19, or the method according to any one of claims 20 to 39.

45. A computer program product comprising computer program instructions, the computer program instructions causing a computer to execute the method according to any one of claims 1 to 19, or the method according to any one of claims 20 to 39.

46. ​​A computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 19, or the method according to any one of claims 20 to 39.

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