WO2020010497A1

WO2020010497A1 - Communication method, device, and system

Info

Publication number: WO2020010497A1
Application number: PCT/CN2018/095050
Authority: WO
Inventors: 陈广甫
Original assignee: 华为技术有限公司
Priority date: 2018-07-09
Filing date: 2018-07-09
Publication date: 2020-01-16
Also published as: CN112385266B; CN112385266A

Abstract

Embodiments of the present application provide a communication method, device, and system. The method comprises: sending key information of a terminal target cell to a source base station, the key information comprising: frequency point information and a (physical cell identifier) PCI; and receiving a base station key of the target cell determined by the source base station according to the key information. The present invention realizes that a target base station sends the frequency point information and the PCI to the source base station, and avoids the problem of large overheads of a source base station system when the source base station searches a frequency point and the PCI of the target cell according to an EGCI of the target cell.

Description

Communication method, equipment and system

Technical field

The present application relates to the field of communication technologies, and in particular, to a communication method, device, and system.

Background technique

When a terminal is moving, a scenario in which a base station that establishes a wireless connection with the terminal is handed over usually occurs. For example, the terminal establishes a wireless connection with base station 1 at position 1 and moves from position 1 to position 2 to establish a wireless connection with base station 2. At this time, base station 1 can be regarded as the source base station, and base station 2 can be regarded as the target base station.

In the prior art, the source base station sends the base station key of the target base station to the target base station. Specifically, the target base station sends an evolved universal mobile communication system cell global identifier (EGCI) of the target cell to the source base station. The source base station obtains the frequency and PCI of the target cell according to the EGCI of the target cell and the correspondence between the EGCI of the different cell and the frequency and the physical cell identifier (PCI). Further, the source base station calculates a base station key according to the frequency of the target cell and the PCI, and sends the calculated base station key to the target base station.

However, in the prior art, there is a problem that the source base station system has a large overhead.

Summary of the invention

The embodiments of the present application provide a communication method, device, and system, which are used to solve the problem that the source base station system has a large overhead in the prior art.

In a first aspect, a communication method according to an embodiment of the present application includes:

Send key information of the target cell of the terminal to the source base station, the key information includes: frequency point information and physical cell identifier PCI;

Receiving a base station key of the target cell determined by the source base station according to the key information.

In the above solution, the target base station sends key information of the target cell of the terminal to the source base station, and the key information includes frequency point information and a physical cell identifier, so that the source base station determines the target cell based on the key information. And the source base station determines the base station key of the target cell according to the key information, so that the target base station sends the frequency point information and the physical cell identity to the source base station, avoiding the When the EGCI of the target cell searches for the frequency point and the physical cell identity of the target cell, the source base station has a large system overhead problem.

In a possible implementation design, the sending the key information of the terminal target cell to the source base station includes:

After receiving the recovery identifier sent by the terminal, the key information of the target cell of the terminal is sent to the source base station; the recovery identifier is used to obtain the user equipment UE context of the terminal.

In the above solution, after receiving the recovery identifier sent by the terminal, the key information of the target cell of the terminal is sent to the source base station, so that after receiving the recovery identifier sent by the terminal, the NB-IoT system is implemented to the source. A processing flow in which a base station sends key information of a target cell of the terminal.

In a possible implementation design, after receiving the recovery identifier sent by the terminal, sending the key information of the target cell of the terminal to the source base station includes:

After receiving the radio resource control RRC connection restoration request sent by the terminal, the key information of the terminal target cell is sent to the source base station, and the RRC connection restoration request includes the restoration identifier.

In the above solution, after receiving the radio resource control RRC connection restoration request sent by the terminal, the key information of the target cell of the terminal is sent to the source base station, thereby realizing the RRC received by the terminal in the NB-IoT system A processing procedure for sending key information of the target cell of the terminal to the source base station after the connection restoration request.

In a possible implementation design, the sending the key information of the target cell to the source base station includes:

Sending a request to acquire the UE context of the user equipment to the source base station, where the request for acquiring the UE context includes the key information.

In the above solution, the UE obtains the UE context request to the source base station, and the UE context request includes the key information, so that the target base station transmits the key information in the UE context request to the source base station.

In a possible implementation design, the request for obtaining the UE context includes: a first field and a second field; the first field is used to indicate frequency point information, and the second field is used to indicate PCI.

Before sending the UE context acquisition request to the source base station, or after sending the UE context acquisition request to the source base station, send the key information of the terminal target cell to the source base station.

In a possible implementation design, the receiving the base station key of the target cell determined by the source base station according to the key information includes:

Receiving a UE context obtaining response sent by the source base station, where the UE obtaining context response includes a base station key of the target cell determined by the source base station according to the key information.

In the above solution, the source base station is implemented by receiving a UE context obtaining response sent by the source base station, where the source UE base response includes a base station key of the target cell determined by the source base station according to the key information The base station key is carried in the UE context response and sent to the target base station.

In a second aspect, a communication method according to an embodiment of the present application includes:

Receiving key information of a terminal target cell sent by a target base station, the key information including: frequency point information and a physical cell identifier PCI;

Determining a base station key of the target cell according to the key information;

Sending the determined base station key to the target base station.

In the above solution, the source base station receives the key information of the terminal target cell sent by the target base station. The key information includes: frequency point information and a physical cell identifier PCI. Based on the key information, the base station of the target cell is determined. Key and sending the base station key to the target base station, enabling the target base station to send frequency point information and physical cell identification to the source base station, avoiding the source base station finding the frequency of the target cell based on the EGCI of the target cell Point and the physical cell identification, the source base station system overhead is large.

In a possible implementation design, the key information of the target cell of the terminal sent by the receiving source base station includes:

Receive a UE context acquisition request sent by a target base station, where the UE context acquisition request includes key information of a target cell of the terminal.

In the above solution, by receiving the UE context acquisition request sent by the target base station, the UE context acquisition request includes key information of the target cell of the terminal, so that the target base station carries the key information in the UE context acquisition request to the source. Base station.

Before receiving the UE context acquisition request sent by the source base station, or after receiving the UE context acquisition request sent by the source base station, receiving the key information of the target cell sent by the source base station.

In a possible implementation design, the sending the determined base station key to the target base station includes:

Sending a UE context obtaining response to the target base station, where the UE context obtaining response includes the determined base station key.

In the above solution, by sending a UE context obtaining response to the target base station, the UE obtaining context response includes the determined base station key, so that the source base station carries the base station key in the UE obtaining context response and sends it to the target base station. .

In a third aspect, a communication device according to an embodiment of the present application includes:

A sending unit, configured to send key information of the target cell of the terminal to the source base station, where the key information includes: frequency point information and a physical cell identifier PCI;

The receiving unit is configured to receive a base station key of the target cell determined by the source base station according to the key information.

In a possible implementation design, the sending unit is specifically configured to:

In a possible implementation design, the receiving unit is specifically configured to:

For the beneficial effects of the communication device provided in the foregoing third aspect, reference may be made to the beneficial effects provided by the implementation manner of the foregoing first aspect, and details are not described herein again.

In a fourth aspect, a communication device according to an embodiment of the present application includes:

The receiving unit receives key information of a target target cell sent by a target base station, where the key information includes: frequency point information and a physical cell identifier PCI;

A processing unit, according to the key information, determining a base station key of the target cell;

The sending unit sends the determined base station key to the target base station.

In a possible implementation design, the obtaining UE context request includes: a first field and a second field; the first field is used to indicate frequency point information, and the second field is used to indicate PCI.

For the beneficial effects of the communication device provided in the foregoing fourth aspect, reference may be made to the beneficial effects provided by the implementation manner of the foregoing second aspect, and details are not described herein again.

In a fifth aspect, a communication device according to an embodiment of the present application includes: a processor, a memory, and a communication interface;

The processor controls a transmitting and receiving action of the communication interface;

The memory stores a program;

The processor calls a program stored in the memory to execute the method according to any one of the first aspects.

According to a sixth aspect, a communication device according to an embodiment of the present application includes: a processor, a memory, and a communication interface;

The memory stores a program;

According to a seventh aspect, a communication system according to an embodiment of the present application includes: the communication device according to any one of the third aspects, and the communication device according to any one of the fourth aspects; or Communication equipment, and the communication equipment according to the sixth aspect.

In an eighth aspect, a computer-readable storage medium according to an embodiment of the present application stores a computer program thereon, and when the computer program is executed by a computer, the method according to any one of the first aspects is implemented.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a first schematic diagram of an application architecture according to an embodiment of the present application; FIG.

FIG. 1B is a first schematic diagram of an application scenario according to an embodiment of the present application; FIG.

FIG. 1C is a second schematic diagram of an application scenario according to an embodiment of the present application; FIG.

2 is a flowchart of a communication method according to an embodiment of the present application;

3 is a schematic structural diagram of a communication device according to an embodiment of the present application;

4 is a schematic structural diagram of a communication device according to another embodiment of the present application;

FIG. 5 is a schematic diagram of a hardware structure of a communication device according to an embodiment of the present application.

detailed description

FIG. 1A is a schematic diagram of an application architecture according to an embodiment of the present application. As shown in FIG. 1, the application architecture of the embodiment of the present application may include: a source base station and a target base station, and the source base station and the target base station may communicate through an X2 interface. Wherein, the source base station and the target base station are relative to the terminal. Specifically, as shown in FIG. 1B, when the terminal is in position 1, it is within the coverage of the base station 1 and establishes a wireless connection with the base station 1. After moving from position 1 to position 2, it is within the coverage of base station 2 and establishes a wireless connection with base station 2. At this time, base station 1 can be considered as the source base station, and base station 2 can be considered as the target base station.

It should be noted that the embodiments of the present application can be applied to any application scenario involving the source base station and the target base station, and the source base station sends the base station key of the target cell of the target base station to the target base station. The communication system includes, but is not limited to: long-term LTE (long term term evolution) system, narrowband internet of things (NB-IoT), 5G new radio (NR) system, global mobile communication system (global system for mobile communication, GSM), Mobile communication systems (universal mobile communication systems, UMTS), code division multiple access (code division multiple access, CDMA) systems, and new network systems. It should be noted that, in the embodiment of the present application, the base station key of the target cell may specifically refer to a key node, star, or KeNB * for short.

The terminal may also be referred to as a user equipment, which may include, but is not limited to, a smart phone (such as an Android phone, an IOS phone, etc.), a multimedia device, a streaming media device, a personal computer, a tablet computer, a handheld computer, and a mobile Internet device. devices, MID) or wearable smart devices.

The base station may be an evolved NodeB (eNB) in LTE, or a base station in a fifth generation (5G) mobile communication system (also called a new radio (NR)) may be referred to as a 5G base station ( gNodeB, gNB), or relay station, or in-vehicle equipment, wearable equipment, and access network equipment in the future 5G network or access network equipment in the future evolved public land mobile network (PLMN) network, etc. This application is not limited.

In the prior art, the target base station sends the EGCI of the target cell of the terminal to the source base station. The source base station obtains the frequency point and PCI of the target cell according to the EGCI of the target cell and the correspondence between different cell EGCIs and frequency points and PCI, and calculates the base station key of the target cell based on the frequency point and PCI of the target cell and sends it to the target base station. It can be seen that in the prior art, the source base station needs to query the correspondence between the EGCI of different cells, frequency points, and PCI according to the EGCI of the target cell to obtain the frequency point and PCI of the target cell, so there is a problem that the source base station has a large system overhead. In addition, the source base station stores the correspondence between the EGCI of different cells, the frequency points, and the PCI, which also brings a large system overhead. At present, the base station can obtain the correspondence between EGCI and frequency and PCI in different cells in the following two ways: Mode 1) Considering the handover relationship between sites, manually configure the correspondence between EGCI and frequency and PCI in different cells; 2) Receive X2 configuration (X2 setup) messages from different base stations. The X2 setup of a base station carries the frequency point information and PCI of the cell of the base station. According to the X2 setup message of different base stations, EGCI of different cells with frequency points and PCI The corresponding relationship is stored in memory.

When the communication system is an NB-IoT system, the following specific description is made.

In the NB-IoT system, a Suspend-Resume process has been added. Specifically, when the base station releases the connection, the current UE context is stored, and a radio resource control (radio resource control, RRC) connection release is sent to the terminal to let the terminal enter the suspend mode. Identifier (ID) is restored. After receiving the suspend command, the terminal enters suspend mode and stores the current AS context. When the terminal needs to establish a connection after entering the suspend mode, the terminal may send an RRC connection resume request to the base station, and the RRC connection resume request carries a resume identifier. The base station can identify the terminal by restoring the identification, and skip the relevant configuration information exchange, and directly enter the data transmission.

In the above process, when the terminal sends a recovery identifier different from the base station that receives the recovery identifier, that is, the base station that sends the recovery identifier is the source base station, and the base station that receives the recovery identifier is the target base station, as shown in FIG. 1C, the target base station receives the terminal. After sending the RRC connection restoration request, a UE context request (retrieves) is sent to the source base station. The UE context request can carry the recovery identifier and the ECGI of the target cell. The source base station determines the user equipment according to the source base station recovery identifier. (userequipment, UE) context, obtain the frequency of the target cell and the PCI according to the ECGI, determine the base station key of the target cell based on the frequency of the target cell and the PCI, and send the UE context response (retrieves the UE context response) to the target base station ), The obtained UE context response may include the determined UE context and the base station key.

FIG. 2 is a flowchart of a communication method according to an embodiment of the present application. As shown in FIG. 2, the method in this embodiment may include:

Step 201: The target base station sends key information of the target cell of the terminal to the source base station, and the key information includes frequency point information and a physical cell identifier.

In this step, when the target base station needs to obtain the base station key (ie, KeNB *) of the target cell of the terminal, the target base station may send the key information of the target cell of the terminal to the source base station. Specifically, the key information of the target cell of the terminal can be sent to the source base station through the X2 interface between the target base station and the source base station. The frequency point information may be used to indicate a downlink carrier frequency point (DL-EARFCN) of the target cell. It should be noted that the target cell is a cell under the target base station.

When the communication system is an NB-IoT system, the key information of the target cell of the terminal may be sent to the source base station by triggering the recovery identifier sent by the receiving terminal. Therefore, optionally, step 201 may specifically include: after receiving the recovery identifier sent by the terminal, sending key information of the terminal target cell to the source base station; the recovery identifier is used to obtain the UE of the terminal Context.

Optionally, as shown in FIG. 1C, when the terminal needs to establish a connection after entering the suspend mode, it may send an RRC connection recovery request to the target base station, and the RRC connection recovery request may include a recovery identifier. Correspondingly, step 201 may specifically include: after receiving the RRC connection restoration request sent by the terminal, sending key information of the target cell of the terminal to the source base station, and the RRC connection restoration request includes a restoration identifier.

Further optionally, as shown in FIG. 1C, the target base station may send the key information of the target cell of the terminal to the source base station before sending the UE context acquisition request to the source base station; or the target base station may also send the key information to the source base station. After the source base station sends a request for obtaining the UE context, the key information of the target cell of the terminal is sent to the source base station; or, the target base station may also carry the key information of the target cell of the terminal to the source base station in the request for obtaining the UE context. .

Optionally, key information of the target cell of the terminal may be included in the UE context obtaining request by adding a field to the UE context obtaining request. Optionally, the request for obtaining the UE context may include a first field and a second field; the first field is used to indicate frequency point information, and the second field is used to indicate PCI.

The TS36.423 protocol is used as an example. The fields included in the UE context request before adding a field can be shown in Table 1 below, and the fields included in the UE context request after adding a field can be shown in Table 2 below.

Table 1

Table 2

It should be noted that the new eNB and the newly evolved universal land-based radio access network (E-UTRAN) in Tables 1 and 2 above can be understood as target base stations.

Step 202: The source base station determines a base station key of the target cell according to the key information.

In this step, the source base station may calculate the base station key of the target cell according to the frequency point information of the target cell, the physical cell identifier, and the base station key of the source base station. Similarly, the terminal can also calculate the base station key of the target cell by the same method. It should be noted that the specific manner in which the source base station determines the base station key of the target cell based on the key information is not limited in this application. The base station key of the source base station may specifically refer to a key nodeb (KeNB for short).

Step 203: The source base station sends the determined base station key to the target base station.

In this step, the source base station may carry AS security information (AS Security Information) in the message, and the AS Security information may carry base station key information elements. After receiving the base station key of the target cell, the target base station can directly use it.

Optionally, when the communication system is an NB-IoT system, step 203 may specifically include: the source base station sends a UE context response to the target base station, and the UE context response includes the source base station according to the The base station key of the target cell determined by the key information.

In this embodiment, the target base station sends key information of the target cell of the terminal to the source base station. The key information includes frequency point information and a physical cell identifier, and the source base station determines the target based on the key information. The base station key of the cell, and sending the base station key to the target base station enables the target base station to send the frequency point information and the physical cell identifier to the source base station, avoiding the source base station to find the target based on the EGCI of the target cell When the frequency of a cell and the physical cell are identified, the source base station has a large system overhead.

In addition, compared with the above manner 1, the manual configuration of the correspondence between different cell EGCIs and frequency points and PCI is avoided, and the configuration time is reduced. In addition, for the suspended recovery process in the NB-IoT system, since there is no switching relationship between the source base station and the target base station, as long as there is an X2 interface, it can be implemented, and the data is more difficult to complete. Compared with the above manner 2, the source base station does not need to store the frequency point information and PCI of different cells in the memory, which reduces the memory consumption of the source base station.

FIG. 3 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in FIG. 3, the communication device 30 provided in this embodiment may include a sending unit 301 and a receiving unit 302.

The sending unit 301 is configured to send key information of the target cell of the terminal to the source base station, where the key information includes: frequency point information and a physical cell identifier PCI;

The receiving unit 302 is configured to receive a base station key of the target cell determined by the source base station according to the key information.

Optionally, the sending unit 301 is specifically configured to:

Optionally, the request for obtaining the UE context includes: a first field and a second field; the first field is used to indicate frequency point information, and the second field is used to indicate PCI.

Optionally, the sending unit 301 is specifically configured to:

Optionally, the receiving unit 302 is specifically configured to:

The communication device in this embodiment may be used for the technical solution on the target base station side in the embodiment shown in FIG. 2. The implementation principles and technical effects are similar, and details are not described herein again.

FIG. 4 is a schematic structural diagram of a communication device according to another embodiment of the present application. As shown in FIG. 4, the communication device 40 provided in this embodiment may include a receiving unit 401, a processing unit 402, and a sending unit 403.

The receiving unit 401 receives key information of a terminal target cell sent by a target base station, where the key information includes: frequency point information and a physical cell identifier PCI;

The processing unit 402 determines a base station key of the target cell according to the key information;

The sending unit 403 sends the determined base station key to the target base station.

Optionally, the receiving unit 401 is specifically configured to:

Optionally, the sending unit 403 is specifically configured to:

The communication device in this embodiment may be used for the technical solution on the source base station side in the embodiment shown in FIG. 3, and its implementation principles and technical effects are similar, and details are not described herein again.

It should be noted that it should be understood that the division of each unit of the above communication device is only a division of logical functions. In actual implementation, it may be fully or partially integrated into a physical entity, or it may be physically separated. And these units can all be implemented in the form of software calling through processing elements; they can also be all implemented in hardware; some units can also be implemented through software calling through processing elements, and some units can be implemented through hardware. For example, the sending unit may be a separately established processing element, or it may be integrated and implemented in a certain chip of the network device. In addition, it may also be stored in the form of a program in the memory of the network device and called by a certain processing element of the network device. And perform the function of the sending unit. The implementation of other units is similar. In addition, all or part of these units can be integrated together, or they can be implemented independently. The processing element described herein may be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each unit above may be completed by an integrated logic circuit of hardware in a processor element or an instruction in the form of software. In addition, the above sending unit is a unit that controls sending, and can receive information through a sending device of a network device, such as an antenna and a radio frequency device.

The above units may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (ASIC), or one or more microprocessors (digital processors) , DSP), or one or more Field Programmable Gate Array (FPGA). As another example, when one of the above units is implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or another processor that can call a program. As another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

FIG. 5 is a schematic diagram of a hardware structure of a communication device according to an embodiment of the present application. The communication device 50 includes at least one processor 501, a communication bus 502, a memory 503, and at least one communication interface 504.

The processor 501 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors for controlling the execution of the program program of the present application integrated circuit.

The communication bus 502 may include a path for transmitting information between the aforementioned components.

The communication interface 504 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .

The memory 503 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions Dynamic storage device, can also be electrically erasable programmable read-only memory (electrically erasable programmable read-only memory (EEPROM)), read-only compact disc (compact disc-read-only memory (CD-ROM) or other optical disc storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this. The memory may exist independently and be connected to the processor through a bus. The memory can also be integrated with the processor.

The memory 503 is configured to store application program code that executes the solution of the present application, and is controlled and executed by the processor 501. The processor 501 is configured to execute application program code stored in the memory 503, so as to implement the communication method provided in the foregoing embodiment of the present application.

Alternatively, optionally, in the embodiment of the present application, the processor 501 may perform processing-related functions in the communication method provided by the foregoing embodiments of the present application. The communication interface 504 is responsible for communicating with other devices or communication networks. Examples do not specifically limit this.

In a specific implementation, as an embodiment, the processor 501 may include one or more CPUs.

In a specific implementation, as an embodiment, the communication device 50 may include multiple processors. Each of these processors can be a single-CPU processor or a multi-CPU processor. A processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

In a specific implementation, as an embodiment, the communication device 50 may further include an output device and an input device. The output device communicates with the processor 501 and can display information in a variety of ways. For example, the output device may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. . The input device is in communication with the processor 501 and can accept user input in a variety of ways. For example, the input device may be a mouse, a keyboard, a touch screen device, or a sensing device.

In addition, as described above, the communication device 50 provided in the embodiment of the present application may be a chip, or a terminal, or a network device, or a device having a similar structure in FIG. 5. The embodiment of the present application does not limit the type of the communication device 50.

In this embodiment, the communication device 50 is presented in the form of dividing each functional module in an integrated manner. The "module" herein may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other functions that can provide the above functions. Device. In a simple embodiment, those skilled in the art may think that the communication device 30 and the communication device 40 may take the form shown in FIG. 5. For example, the function / implementation process of the sending unit and the receiving unit in FIG. 3 may be implemented by the processor 501 and the memory 503 of FIG. 5. Specifically, the processing unit may be executed by calling the application program code stored in the memory 503 by the processor 501, which is not limited in the embodiment of the present application. Alternatively, optionally, the function / implementation process of the processing unit in FIG. 4 may be implemented by the processor 501 in FIG. 5; the sending unit and the receiving unit in FIG. 4 may be implemented through the communication interface 504 in FIG. 5. The embodiment does not limit this in any way.

It should be noted that the communication device provided in the embodiment shown in FIG. 5 may specifically be a source base station or a target base station in the embodiment shown in FIG. 2. When the processor 501 calls a program stored in the memory 503, the processor shown in FIG. 2 may execute The embodiment provides a method of a source base station side or a target base station side in a communication method.

Optionally, an embodiment of the present application provides a communication system. The communication system may include: the communication device shown in FIG. 3 and FIG. 4; or the communication device shown in FIG. 5.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are wholly or partially generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be from a website site, a computer, a server, or a data center. Transmission to another website site, computer, server, or data center through wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or includes one or more data storage devices such as servers, data centers, and the like that can be integrated with the medium. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk, SSD)), and the like.

Claims

A communication method, comprising:

Send key information of the target cell of the terminal to the source base station, the key information includes: frequency point information and physical cell identifier PCI;

Receiving a base station key of the target cell determined by the source base station according to the key information.
The method according to claim 1, wherein the sending the key information of the target cell of the terminal to the source base station comprises:

After receiving the recovery identifier sent by the terminal, the key information of the target cell of the terminal is sent to the source base station; the recovery identifier is used to obtain the user equipment UE context of the terminal.
The method according to claim 2, wherein after receiving the recovery identifier sent by the terminal, sending the key information of the terminal target cell to the source base station comprises:

After receiving the radio resource control RRC connection restoration request sent by the terminal, the key information of the terminal target cell is sent to the source base station, and the RRC connection restoration request includes the restoration identifier.
The method according to claim 2 or 3, wherein the sending the key information of the target cell to the source base station comprises:

Sending a request to acquire the UE context of the user equipment to the source base station, where the request for acquiring the UE context includes the key information.
The method according to claim 4, wherein the request for obtaining the UE context includes a first field and a second field; the first field is used to indicate frequency point information, and the second field is used to indicate PCI.
The method according to claim 2 or 3, wherein the sending the key information of the target cell to the source base station comprises:

Before sending the UE context acquisition request to the source base station, or after sending the UE context acquisition request to the source base station, send the key information of the terminal target cell to the source base station.
The method according to any one of claims 4-6, wherein the receiving a base station key of the target cell determined by the source base station according to the key information comprises:

Receiving a UE context obtaining response sent by the source base station, where the UE obtaining context response includes a base station base station key of the target cell determined by the source base station according to the key information.
A communication method, comprising:

Receiving key information of a terminal target cell sent by a target base station, the key information including: frequency point information and a physical cell identifier PCI;

Determining a base station key of the target cell according to the key information;

Sending the determined base station key to the target base station.
The method according to claim 8, wherein the key information of the target cell of the terminal sent by the receiving source base station comprises:

Receive a UE context acquisition request sent by a target base station, where the UE context acquisition request includes key information of a target cell of the terminal.
The method according to claim 9, wherein the request for obtaining the UE context comprises: a first field and a second field; the first field is used to indicate frequency point information, and the second field is used to indicate PCI.
The method according to claim 8, wherein the key information of the target cell of the terminal sent by the receiving source base station comprises:

Before receiving the UE context acquisition request sent by the source base station, or after receiving the UE context acquisition request sent by the source base station, receiving the key information of the target cell sent by the source base station.
The method according to any one of claims 9-11, wherein the sending the determined base station key to the target base station comprises:

Sending a UE context obtaining response to the target base station, where the UE context obtaining response includes the determined base station key.
A communication device, comprising:

A sending unit, configured to send key information of the target cell of the terminal to the source base station, where the key information includes: frequency point information and a physical cell identifier PCI;

The receiving unit is configured to receive a base station key of the target cell determined by the source base station according to the key information.
The communication device according to claim 13, wherein the sending unit is specifically configured to:

After receiving the recovery identifier sent by the terminal, the key information of the target cell of the terminal is sent to the source base station; the recovery identifier is used to obtain the user equipment UE context of the terminal.
The communication device according to claim 14, wherein the sending unit is specifically configured to:

After receiving the radio resource control RRC connection restoration request sent by the terminal, the key information of the terminal target cell is sent to the source base station, and the RRC connection restoration request includes the restoration identifier.
The communication device according to claim 14 or 15, wherein the sending unit is specifically configured to:

Sending a request to acquire the UE context of the user equipment to the source base station, where the request for acquiring the UE context includes the key information.
The communication device according to claim 16, wherein the UE context obtaining request includes: a first field and a second field; the first field is used to indicate frequency point information, and the second field is used to Indicates PCI.
The communication device according to claim 14 or 15, wherein the sending unit is specifically configured to:

Before sending the UE context acquisition request to the source base station, or after sending the UE context acquisition request to the source base station, send the key information of the terminal target cell to the source base station.
The communication device according to any one of claims 16 to 18, wherein the receiving unit is specifically configured to:

Receiving a UE context obtaining response sent by the source base station, where the UE obtaining context response includes a base station key of the target cell determined by the source base station according to the key information.
A communication device, comprising:

The receiving unit receives key information of a target target cell sent by a target base station, where the key information includes: frequency point information and a physical cell identifier PCI;

A processing unit, according to the key information, determining a base station key of the target cell;

The sending unit sends the determined base station key to the target base station.
The communication device according to claim 20, wherein the receiving unit is specifically configured to:

Receive a UE context acquisition request sent by a target base station, where the UE context acquisition request includes key information of a target cell of the terminal.
The communication device according to claim 21, wherein the UE context obtaining request includes: a first field and a second field; the first field is used to indicate frequency point information, and the second field is used to Indicates PCI.
The communication device according to claim 20, wherein the receiving unit is specifically configured to:

Before receiving the UE context acquisition request sent by the source base station, or after receiving the UE context acquisition request sent by the source base station, receiving the key information of the target cell sent by the source base station.
The communication device according to any one of claims 21 to 23, wherein the sending unit is specifically configured to:

Sending a UE context obtaining response to the target base station, where the UE context obtaining response includes the determined base station key.
A communication device, comprising: a processor, a memory, and a communication interface;

The processor controls a transmitting and receiving action of the communication interface;

The memory stores a program;

The processor calls a program stored in the memory to execute the method according to any one of claims 1-7.
A communication device, comprising: a processor, a memory, and a communication interface;

The processor controls a transmitting and receiving action of the communication interface;

The memory stores a program;

The processor calls a program stored in the memory to execute the method according to any one of claims 8-12.
A communication system, comprising: the communication device according to any one of claims 13-19, and the communication device according to any one of claims 20-24; or the communication device according to claim 25 And a communication device according to claim 26.
A computer-readable storage medium having stored thereon a computer program, characterized in that when the computer program is executed by a computer, the method according to any one of claims 1-12 is implemented.