WO2020024296A1

WO2020024296A1 - Base station switching method and apparatus, and network device

Info

Publication number: WO2020024296A1
Application number: PCT/CN2018/098673
Authority: WO
Inventors: 卢前溪; 王淑坤
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-08-03
Filing date: 2018-08-03
Publication date: 2020-02-06
Also published as: CN111869262B; CN111869262A

Abstract

Provided in the embodiments of the present application are a base station switching method and apparatus, and a network device; the method comprises: a first base station receiving first indication information sent by a second base station, the first indication information being used to indicate the execution of a conversion process between a main node and an auxiliary node, wherein the first base station is the auxiliary node, and the second base station is the main node.

Description

Method and device for base station switching, and network equipment

Technical field

The embodiments of the present application relate to the field of mobile communication technologies, and in particular, to a base station handover method and device, and a network device.

Background technique

Low-latency and high-reliability communication (URLLC, Ultra Reliable and Low Communication) is an important communication method in the future. In order to improve the reliability of data transmission, the communication between the terminal and the network can be in the form of dual-link or multi-link, so that data can be successfully transmitted on at least one link.

Dual connectivity (DC, Dual Connectivity) network can realize dual-link communication. Under DC network, when the terminal (UE, User Equipment) is migrated, if two transmission links are switched at the same time, or one link is switched If the switchover of another link is not completed yet, data will be completely interrupted in a short period of time.

Summary of the invention

The embodiments of the present application provide a base station handover method and device, and a network device.

The base station handover method provided in the embodiment of the present application includes:

The first base station receives first instruction information sent by a second base station, where the first instruction information is used to instruct execution of a conversion process between a primary node and a secondary node, the first base station is a secondary node, and the second base station is The master node.

The base station switching device provided in the embodiment of the present application includes:

A receiving unit, configured to receive first instruction information sent by a second base station, where the first instruction information is used to instruct execution of a conversion process between a primary node and a secondary node, where the first base station is a secondary node, and the second The base station is the master node.

The network device provided in the embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the base station handover method described above.

The chip provided in the embodiment of the present application is used to implement the foregoing base station handover method.

Specifically, the chip includes a processor for invoking and running a computer program from a memory, so that a device installed with the chip executes the base station handover method described above.

The computer-readable storage medium provided in the embodiment of the present application is used to store a computer program, and the computer program causes a computer to execute the foregoing base station handover method.

The computer program product provided in the embodiment of the present application includes computer program instructions, and the computer program instructions cause a computer to execute the foregoing base station handover method.

The computer program provided in the embodiment of the present application, when run on a computer, causes the computer to execute the above-mentioned base station handover method.

Through the above technical solution, the first base station receives the first instruction information sent by the second base station, where the first instruction information is used to instruct execution of a conversion process between the primary node and the secondary node, and the first base station is the secondary node, so The second base station is described as the master node, so that the role switching between the primary node and the secondary node in the DC network is realized. This role switching process can ensure that there is always a node that can normally perform data transmission, thus avoiding the terminal moving. The occurrence of data interruption further solves the problem of how to use the key of each node during the role switching process and after the role switching is completed.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described here are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

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

2 is a DC network architecture diagram provided by an embodiment of the present application;

FIG. 3 is a flowchart of adding an SN by an MN according to an embodiment of the present application; FIG.

4 is a flowchart of an MN modifying an SN according to an embodiment of the present application;

FIG. 5 is a schematic diagram of derivation of a secret key on the SN side according to an embodiment of the present application; FIG.

FIG. 6 is a schematic diagram of horizontal and vertical derivation of key derivation provided in an embodiment of the present application; FIG.

7 is a flowchart of a handover based on an N2 interface according to an embodiment of the present application;

8 is a flowchart of a handover based on an Xn interface according to an embodiment of the present application;

FIG. 9 is a first schematic flowchart of a base station handover method according to an embodiment of the present application; FIG.

FIG. 10 is a schematic diagram of forwarding information through AMF according to an embodiment of the present application; FIG.

11 is a second schematic flowchart of a base station handover method according to an embodiment of the present application;

FIG. 12 is a third flowchart of a base station handover method according to an embodiment of the present application;

13 is a schematic structural composition diagram of a base station switching device according to an embodiment of the present application;

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

15 is a schematic structural diagram of a chip according to an embodiment of the present application;

FIG. 16 is a schematic block diagram of a communication system according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a Global System for Mobile (GSM) system, a Code Division Multiple Access (CDMA) system, and a Wideband Code Division Multiple Access (Wideband Code Division Multiple Access) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system or 5G system, etc.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or a communication terminal or a terminal). The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located within the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system. (Evolutional NodeB, eNB or eNodeB), or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device may be a mobile switching center, relay station, access point, vehicle equipment, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in public land mobile networks (PLMN) that will evolve in the future.

The communication system 100 further includes at least one terminal device 120 located within a coverage area of the network device 110. As the "terminal equipment" used herein includes, but is not limited to, connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection ; And / or another data connection / network; and / or via a wireless interface, such as for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and / or another terminal device configured to receive / transmit communication signals; and / or Internet of Things (IoT) devices. A terminal device configured to communicate through a wireless interface may be referred to as a “wireless communication terminal”, a “wireless terminal”, or a “mobile terminal”. Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communications systems (PCS) terminals that can combine cellular radiotelephones with data processing, facsimile, and data communications capabilities; can include radiotelephones, pagers, Internet / internal PDA with network access, web browser, notepad, calendar, and / or Global Positioning System (GPS) receiver; and conventional laptop and / or palm-type receivers or others including radiotelephone transceivers Electronic device. A terminal device can refer to an access terminal, user equipment (User Equipment), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or User device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Processing (PDA), and wireless communication. Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks, or terminal devices in future evolved PLMNs, etc.

Optionally, terminal devices 120 may perform terminal direct device (D2D) communication.

Optionally, the 5G system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.

FIG. 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like in this embodiment of the present application is not limited thereto.

It should be understood that the device having a communication function in the network / system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again. The communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobile management entity, and the like, which is not limited in the embodiments of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" in this document is only a kind of association relationship describing related objects, which means that there can be three kinds of relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and exists alone B these three cases. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technologies related to the embodiments of the present application are explained below.

Referring to FIG. 2, FIG. 2 shows a DC network architecture formed by a primary access network (M-RAN, Master RAN) node and a secondary access network (S-RAN, Secondary RAN) node. It can be seen that the B3 tunnel (N3Tunnel) and air interface They are separated from each other to form two links for redundant transmission, so that the possibility that data can have at least one successful data transmission at a point in time is further increased.

In the DC scenario, when the UE is migrating, if the two transmission links are switched at the same time, or if the switching of the second link is not completed and the second link is switched, it will cause data to be completely complete in a short period of time. Interruption. Therefore, in order to avoid the occurrence of data interruption when the UE moves, a non-disruptive handover mode is needed.

There are two types of handover in the DC network:

1. Secondary node (SN, Secondary Node) addition / modification / deletion: This scenario will not affect the data transmission of the MN, so the data transmission will not be interrupted;

2. Handover (change) of the master node (MN, Master node): This scenario is further divided into 1) the MN and SN are changed at the same time, and 2) the MN is changed without changing the SN. For 1), data transmission will be interrupted, and for 2) data can be transmitted normally on the SN without interruption during the handover process. Therefore, 2) must be used for URLLC switching.

3 and 4, FIG. 3 is a flowchart of adding an SN to the MN, and FIG. 4 is a flowchart of modifying the SN of the MN. However, there is currently no mechanism to switch roles between the MN and the SN. The embodiment of the present application can implement the MN And SN, and solve related key usage issues.

The secret key used by the MN and the SN for role switching (you can think of adding an SN first and then turning this SN into an MN) and the normal handover process (which can be considered as switching from one MN to another MN) The mechanism of keys is different. For the former (MN and SN perform role switching), when the MN adds an SN, the key used on the SN side is the S-KgNB generated by the derivation method shown in Figure 5, which is not the same as the key generated by the ordinary MN handover process. same. For the latter (normal handover procedure), the key for handover is derived using the {NCC, NH} information, see FIG. 6.

Figure 6 shows the horizontal and vertical derivation of the secret key. When the base station has unused {NCC, NH} information, it will use the unused information to derive a new secret key KgNB when it is handed over. The KgNB used derives KgNB *, which is a horizontal derivative. Further, the switching based on the N2 interface can be referred to FIG. 7, and the switching based on the Xn interface can be referred to FIG. 8.

FIG. 9 is a first flowchart of a base station handover method according to an embodiment of the present application. As shown in FIG. 9, the base station handover method includes the following steps:

Step 901: The first base station receives first instruction information sent by a second base station, where the first instruction information is used to instruct execution of a conversion process between a primary node and a secondary node, the first base station is a secondary node, and the first The second base station is the master node.

Here, the first base station and the second base station are two base stations in a DC network, or two base stations in a multi-connection network, where the first base station is an SN and the second base station is an MN. The MN decides to perform role conversion with the SN. , The MN sends first instruction information to the SN, where the first instruction information is used to instruct execution of a conversion process between the primary node and the secondary node.

In the embodiment of the present application, during the role switching process and after the role switching process, the key of each node may be implemented in the following manner.

Method 1: The first indication information carries first key information, and the first key information belongs to the master node key information, and is used by the first base station as a master node.

Here, the MN derives KgNB * and sends it to the SN for use by the SN, so that the first base station becomes the MN to work.

In the embodiment of the present application, the first key information is generated by the second base station in the following manner:

If there is unused first security information, generating the first key information based on the unused first security information;

If there is no unused first security information, the first key information is generated according to the currently used second key information.

Here, the first security information includes NCC (Next Hope Chaining) information and NH (Next Hop) information.

Referring to FIG. 6, KgNB * may be derived in a horizontal or vertical mode.

In the embodiment of the present application, after the first base station obtains the first key information (such as KgNB *), the first base station may perform integrity protection and / or generate an encryption protection key based on the first key information.

In an embodiment, after the first base station and the second base station perform a conversion process between the primary node and the secondary node, the first base station serves as the primary node to generate third key information, and the third The key information belongs to the master node key information, wherein the third key information is different from the first key information.

For example, after the first base station completes the role transition with the second base station, the first base station as a new MN derives a new KgNB, which is used to prevent the original MN (that is, the second base station) from knowing its secret key.

In an implementation manner, after the first base station and the second base station perform a conversion process between the primary node and the secondary node, the first base station serves as the primary node to generate fourth key information, and the fourth The key information belongs to the secondary node key information; the first base station sends the fourth key information to the second base station.

For example, after the roles of the first base station and the second base station are changed, the first base station generates a new S-KgNB and sends the new S-KgNB to the second base station for use.

In one embodiment, the first key information (such as KgNB *) is sent to the terminal by the first base station or the second base station, so that the terminal can use the same key information with the new MN.

Manner 2: The first base station generates first key information based on unused first security information, where the first key information belongs to the master node key information and is used by the first base station as a master node.

Here, the first base station derives KgNB by itself using unused {NCC, NH} information.

In the embodiment of the present application, the first base station acquires the first security information in at least one of the following ways:

1) The first base station acquires the first security information from the second base station; for example, the first security information is carried in the first indication information, and the first base station receives the first security information After the instruction information, the first security information is obtained from the first instruction information.

2) The first base station acquires the first security information from a first core network element. For example, the first base station obtains the first security information from an AMF.

Here, the first safety information includes NCC information and / or NH information.

In one embodiment, the first key information (such as KgNB *) is sent to the terminal by the first base station, so that the terminal can use the same key information with the new MN. Alternatively, the first security information is sent to the terminal by the first base station or the second base station, so that the terminal can derive first key information (such as KgNB *) based on the first security information.

In the above solution, the information sent by the second base station to the first base station includes the first indication information, and may further include first security information and / or first key information, and the first base station may pass the first An interface (Xn interface) between the base station and the second base station receives the first instruction information and / or the first security information and / or the first key information sent by the second base station; or, the first A base station receives the first indication information and / or the first security information and / or the first key information from the second base station forwarded by the network element of the first core network; or the first base station receives the first The first security information sent by the core network element, and the first instruction information and / or the first key information forwarded from the second base station. Here, the first core network element may be AMF. Here, the first core network element may send its own information to the first base station, or it may forward the information from the second base station to the first base station. The content sent by the second base station to the network element of the first core network may be any information in the first instruction information, the first security information, and the first key information (such as any 1 information or any 2 information or 3 information). Information), the content sent by the first core network element to the first base station may be any of the first indication information, the first security information, and the first key information (such as any 1 information or any 2 information or 3 Messages).

Referring to FIG. 10, the MN sends a role change request message to the AMF, and the AMF sends a role change request message to the SN, which carries the first security information NCC and NH. Here, the first indication information carries a role change request message and is indirectly sent to the SN through the AMF, during which the AMF can generate the latest NCC and NH for the target SN to use.

In the embodiment of the present application, in order to enable the terminal to perform normal communication with the new MN (that is, the first base station), the first key information or the second security information is transmitted by the first base station or the second base station. The base station sends to the terminal; or the first key information or the second security information is transparently transmitted to the terminal by the first core network element through the first base station or the second base station. Here, the first core network element may be AMF. The second security information is NCC information corresponding to a currently used key or a new key.

Based on this, the first key information or the second security information is used by the terminal to perform a process of communicating with the first base station based on the first key information, or based on the second The security information derives a new secret key, and communicates with the first base station based on the new secret key. Here, the derived new key (KgNB) needs to further calculate the integrity of the control plane and / or user plane and / or the encryption key to communicate with the base station, instead of directly using KgNB for communication.

In the technical solution of the embodiment of the present application, the types of the MN and the SN may be the same or different. For example, one of the MN and the SN is an NR base station (gNB), and the other is an LTE base station (eNB). For another example: MN and SN are both NR base stations (gNB). For another example: MN and SN are both LTE base stations (eNBs).

For gNB, its corresponding key is recorded as KgNB, and for eNB, its corresponding key is recorded as KeNB.

FIG. 11 is a second schematic flowchart of a base station handover method according to an embodiment of the present application. As shown in FIG. 11, the base station handover method includes the following steps:

1. The MN sends a role change request message to the SN.

Here, the role transition request message includes first indication information, where the first indication information is used to instruct execution of a conversion process between the primary node and the secondary node, and the first indication information carries first key information (KgNB *), The first key information (KgNB *) is derived by the MN in a horizontal or vertical mode by the method shown in FIG. 6.

2. The SN sends a confirmation message to the MN.

This step is optional.

3. The MN sends a role change notification message to the UE.

Here, the role change notification message carries the first key information (KgNB *).

4. The UE sends a confirmation message to the MN.

This step is optional.

In the above process, when the MN and the SN coexist, the MN provides KgNB * for the SN. Since the key used by the SN is the key belonging to the master node, the SN can use the key as the master node to work.

FIG. 12 is a third flowchart of a base station handover method according to an embodiment of the present application. As shown in FIG. 12, the base station handover method includes the following steps:

1. The MN sends a role change request message to the SN.

Here, the role transition request message includes first indication information, where the first indication information is used to instruct execution of a transition process between the primary node and the secondary node.

2. The SN sends a role change notification message to the AMF.

3. The AMF returns a message to the SN, which carries the unused first security information {NCC, NH}.

4. The SN sends a confirmation message to the MN.

5a. The MN sends a role change notification message to the UE, where the message carries unused first security information {NCC, NH}.

5b. The SN sends a role change notification message to the UE, where the message carries unused first security information {NCC, NH}.

The above steps 5a and 5b are optional.

FIG. 13 is a schematic structural composition diagram of a base station switching device according to an embodiment of the present application. As shown in FIG. 13, the device includes:

The receiving unit 1301 is configured to receive first instruction information sent by a second base station, where the first instruction information is used to instruct execution of a conversion process between a primary node and a secondary node, where the first base station is a secondary node, and the first The second base station is the master node.

In an embodiment, the first indication information carries first key information, and the first key information belongs to the master node key information and is used by the first base station as a master node.

In an implementation manner, the first key information is generated by the second base station in the following manner:

In an embodiment, the device further includes:

The security processing unit 1302 is configured to perform integrity protection and / or generate an encryption protection key based on the first key information.

In an embodiment, the device further includes:

The first generating unit 1303 is configured to generate third key information, where the third key information belongs to the master node key information, and the third key information is different from the first key information.

In an embodiment, the device further includes:

The second generating unit 1304 is configured to generate first key information based on the unused first security information, where the first key information belongs to the master node key information and is used by the first base station as the master node.

In an embodiment, the device further includes:

The acquiring unit 1305 is configured to acquire the first security information from the second base station; and / or acquire the first security information from a first core network element.

In an embodiment, the first security information is carried in the first instruction information, and the obtaining unit acquires the first security information from the first instruction information generated by the second base station.

In an embodiment, the first security information includes NCC information and / or NH information.

In an embodiment, the device further includes:

A third generating unit 1306, configured to generate fourth key information, where the fourth key information belongs to the secondary node key information;

The sending unit 1307 is configured to send the fourth key information to the second base station.

In an implementation manner, the receiving unit 1301 is configured to receive the first instruction information and / or the first security sent by the second base station through an interface between the first base station and the second base station. Information and / or first key information; or receiving the first indication information and / or first security information and / or first key information from the second base station and forwarded by the first core network element; Or, receive the first security information sent by the network element of the first core network, and the first indication information and / or the first key information forwarded from the second base station.

In an embodiment, the first key information or the second security information is sent to the terminal by the first base station or the second base station; or the first key information or the second security information is sent by the The first core network element is transparently transmitted to the terminal through the first base station or the second base station. Further, the second security information is NCC information corresponding to a currently used key or a new key.

The first key information or the second security information is used by the terminal to perform a process of communicating with the first base station based on the first key information, or derived based on the second security information. A new secret key, and communicating with the first base station based on the new secret key.

Those skilled in the art should understand that the related description of the foregoing base station handover apparatus in the embodiment of the present application can be understood by referring to the related description of the base station handover method in the embodiment of the present application.

FIG. 14 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application. The communication device may be a network device. The communication device 600 shown in FIG. 14 includes a processor 610, and the processor 610 may call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 14, the communication device 600 may further include a memory 620. The processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.

The memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.

Optionally, as shown in FIG. 14, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, and specifically, may send information or data to other devices, or receive other Information or data sent by the device.

The transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include antennas, and the number of antennas may be one or more.

Optionally, the communication device 600 may specifically be a network device according to the embodiment of the present application, and the communication device 600 may implement a corresponding process implemented by the network device in each method of the embodiment of the present application. For brevity, details are not described herein again. .

Optionally, the communication device 600 may specifically be a mobile terminal / terminal device according to the embodiment of the present application, and the communication device 600 may implement a corresponding process implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, for simplicity , Will not repeat them here.

FIG. 15 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 700 shown in FIG. 15 includes a processor 710, and the processor 710 may call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 15, the chip 700 may further include a memory 720. The processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiment of the present application.

The memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.

Optionally, the chip 700 may further include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips. Specifically, the processor 710 may obtain information or data sent by the other devices or chips.

Optionally, the chip 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips. Specifically, the processor 710 may output information or data to the other devices or chips.

Optionally, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For brevity, details are not described herein again.

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 process implemented by the mobile terminal / terminal device in each method of the embodiments of the present application. For simplicity, here No longer.

It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-level chip, a system chip, a chip system or a system-on-chip.

FIG. 16 is a schematic block diagram of a communication system 900 according to an embodiment of the present application. As shown in FIG. 16, the communication system 900 includes a terminal device 910 and a network device 920.

The terminal device 910 may be used to implement the corresponding functions implemented by the terminal device in the foregoing method, and the network device 920 may be used to implement the corresponding functions implemented by the network device in the foregoing method. .

It should be understood that the processor in the embodiment of the present application may be an integrated circuit chip and has a signal processing capability. In the implementation process, each step of the foregoing method embodiment may be completed by using an integrated logic circuit of hardware in a processor or an instruction in a form of software. The above processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (Field, Programmable Gate Array, FPGA), or other Programming logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present application may be directly implemented by a hardware decoding processor, or may be performed by using a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, and the like. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the foregoing method in combination with its hardware.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. 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), and an electronic memory. Erase programmable read-only memory (EPROM, EEPROM) or flash memory. The volatile memory may be Random Access Memory (RAM), which is used as an external cache. By way of example, but 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 (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM ) And direct memory bus random access memory (Direct Rambus RAM, 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.

It should be understood that the foregoing memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (Double SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct RAMbus RAM, DR RAM) and so on. That is, the memories in the embodiments of the present application are intended to include, but not limited to, these and any other suitable types of memories.

An embodiment of the present application further provides a computer-readable storage medium for storing a computer program.

Optionally, the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application. No longer.

Optionally, the computer-readable storage medium may be applied to the mobile terminal / terminal device in the embodiment of the present application, and the computer program causes the computer to execute a corresponding process implemented by the mobile terminal / terminal device in each method in the embodiment of the present application. For the sake of brevity, I won't repeat them here.

An embodiment of the present application further provides a computer program product, including computer program instructions.

Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instruction causes the computer to execute a corresponding process implemented by the network device in each method in the embodiment of the present application. More details.

Optionally, the computer program product can be applied to a mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute a corresponding process implemented by the mobile terminal / terminal device in each method in the embodiments of the present application, For brevity, I will not repeat them here.

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

Optionally, the computer program may be applied to a network device in the embodiment of the present application. When the computer program is run on a computer, the computer is caused to execute a corresponding process implemented by the network device in each method in the embodiment of the present application. , Will not repeat them here.

Optionally, the computer program may be applied to a mobile terminal / terminal device in the embodiment of the present application. When the computer program is run on a computer, the computer executes each method in the embodiment of the application by the mobile terminal / terminal device. The corresponding processes are not repeated here for brevity.

Those of ordinary skill in the art may realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

Those skilled in the art can 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 foregoing method embodiments, and are not repeated here.

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

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.

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

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 this application is essentially a part that contributes to the existing technology or a 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, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory) ROM, random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes .

The above is only a specific implementation of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A base station handover method, the method includes:

The first base station receives first instruction information sent by a second base station, where the first instruction information is used to instruct execution of a conversion between a primary node and a secondary node, the first base station is a secondary node, and the second base station is a primary node.
The method according to claim 1, wherein the first indication information carries first key information, and the first key information belongs to master node key information, and is used by the first base station as a master node.
The method according to claim 2, wherein the first key information is generated by the second base station in the following manner:

If there is unused first security information, generating the first key information based on the unused first security information;

If there is no unused first security information, the first key information is generated according to the currently used second key information.
The method according to claim 2 or 3, wherein the method further comprises:

The first base station performs integrity protection and / or generates encryption protection key based on the first key information.
The method according to any one of claims 2 to 4, wherein after the first base station and the second base station perform a conversion process between a primary node and a secondary node,

The first base station as the master node generates third key information, and the third key information belongs to the master node key information, wherein the third key information is different from the first key information.
The method according to claim 1, further comprising:

The first base station generates first key information based on unused first security information, where the first key information belongs to master node key information and is used by the first base station as a master node.
The method according to claim 6, wherein the method further comprises:

The first base station acquires the first security information from the second base station; and / or,

Acquiring, by the first base station, the first security information from a first core network element.
The method according to claim 7, wherein when the first base station obtains the first security information from the second base station, the first security information is carried in the first indication information.
The method according to any one of claims 3, 6 to 8, wherein the first security information includes NCC information and / or NH information.
The method according to any one of claims 1 to 9, wherein after the first base station and the second base station perform a conversion process between a primary node and a secondary node,

Generating, by the first base station as a primary node, fourth key information, where the fourth key information belongs to secondary node key information;

Sending, by the first base station, the fourth key information to the second base station.
The method according to any one of claims 1 to 10, wherein:

Receiving, by the first base station through the interface between the first base station and the second base station, the first indication information and / or the first security information and / or the first key information sent by the second base station ;or,

Receiving, by the first base station, the first indication information and / or the first security information and / or the first key information from the second base station forwarded by the first core network element; or,

The first base station receives the first security information sent by the network element of the first core network, and the first indication information and / or the first key information forwarded from the second base station.
The method according to any one of claims 2 to 11, wherein:

Sending the first key information or the second security information to the terminal by the first base station or the second base station; or

The first key information or the second security information is transparently transmitted to the terminal by the first core network element through the first base station or the second base station.
The method according to claim 12, wherein the second security information is NCC information corresponding to a currently used key or a new key.
The method according to claim 12 or 13, wherein the first key information or the second security information is used by the terminal to perform a process based on the first key information and the first base station Performing communication, or deriving a new key based on the second security information, and communicating with the first base station based on the new key.
A base station switching device includes:

A receiving unit, configured to receive first instruction information sent by a second base station, where the first instruction information is used to instruct execution of a conversion process between a primary node and a secondary node, where the first base station is a secondary node, and the second The base station is the master node.
The apparatus according to claim 15, wherein the first indication information carries first key information, and the first key information belongs to master node key information, and is used by the first base station as a master node.
The apparatus according to claim 16, wherein the first key information is generated by the second base station in the following manner:

If there is unused first security information, generating the first key information based on the unused first security information;

If there is no unused first security information, the first key information is generated according to the currently used second key information.
The apparatus according to claim 16 or 17, wherein the apparatus further comprises:

The security processing unit is configured to perform integrity protection and / or generate an encryption protection key based on the first key information.
The device according to any one of claims 16 to 18, wherein the device further comprises:

The first generating unit is configured to generate third key information, where the third key information belongs to the master node key information, wherein the third key information is different from the first key information.
The apparatus according to claim 15, wherein the apparatus further comprises:

The second generating unit is configured to generate first key information based on the unused first security information, where the first key information belongs to the master node key information and is used by the first base station as the master node.
The apparatus of claim 20, wherein the apparatus further comprises:

An acquiring unit, configured to acquire the first security information from the second base station; and / or acquire the first security information from a first core network element.
The apparatus according to claim 21, wherein the first security information is carried in the first indication information, and the obtaining unit obtains the first security information from the first indication information generated by the second base station. A safety message.
The device according to any one of claims 17, 20 to 22, wherein the first safety information includes NCC information and / or NH information.
The device according to any one of claims 15 to 23, wherein the device further comprises:

A third generating unit, configured to generate fourth key information, where the fourth key information belongs to the secondary node key information;

A sending unit, configured to send the fourth key information to the second base station.
The apparatus according to any one of claims 15 to 24, wherein the receiving unit is configured to receive the first base station sent by the second base station through an interface between the first base station and the second base station. An indication information and / or a first security information and / or a first key information; or, receiving the first indication information and / or the first security information from the second base station forwarded by a first core network element And / or the first key information; or receiving the first security information sent by the network element of the first core network, and the first indication information and / or the first key information forwarded from the second base station.
The device according to any one of claims 16 to 25, wherein:

The first key information or the second security information is sent to the terminal by the first base station or the second base station; or

The first key information or the second security information is transparently transmitted to the terminal by the first core network element through the first base station or the second base station.
The device according to claim 26, wherein the second security information is NCC information corresponding to a currently used key or a new key.
The apparatus according to claim 26 or 27, wherein the first key information or the second security information is used by the terminal to perform a process based on the first key information and the first base station Performing communication, or deriving a new key based on the second security information, and communicating with the first base station based on the new key.
A network device includes a processor and a memory, where the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory, and execute the method according to any one of claims 1 to 14. Methods.
A chip includes a processor for calling and running a computer program from a memory, so that a device having the chip installed performs the method according to any one of claims 1 to 14.
A computer-readable storage medium for storing a computer program that causes a computer to perform the method according to any one of claims 1 to 14.
A computer program product comprising computer program instructions that cause a computer to perform the method according to any one of claims 1 to 14.
A computer program that causes a computer to perform the method according to any one of claims 1 to 14.