WO2024131512A1 - 一种小区切换方法以及装置 - Google Patents

一种小区切换方法以及装置 Download PDF

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Publication number
WO2024131512A1
WO2024131512A1 PCT/CN2023/136154 CN2023136154W WO2024131512A1 WO 2024131512 A1 WO2024131512 A1 WO 2024131512A1 CN 2023136154 W CN2023136154 W CN 2023136154W WO 2024131512 A1 WO2024131512 A1 WO 2024131512A1
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WIPO (PCT)
Prior art keywords
network device
access network
upip
function
switching
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PCT/CN2023/136154
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English (en)
French (fr)
Inventor
蒋文欢
吴联芳
顾晨
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华为技术有限公司
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Publication of WO2024131512A1 publication Critical patent/WO2024131512A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/04—Reselecting a cell layer in multi-layered cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the embodiments of the present application relate to the field of communication technology, and in particular, to a cell switching method and device.
  • LTE long term evolution
  • the core network equipment includes mobility management entity (mobility management entity, MME) and user plane processing gateway (serving gateway, SGW).
  • MME belongs to the control plane part and is responsible for mobility management of the control plane, including user context and mobility state management, allocation of user temporary identity, etc.
  • SGW belongs to the user plane part and is responsible for initiating paging for downlink data in idle state, managing and saving IP bearer parameters and network routing information, etc.
  • MME and SGW are meshed and one MME can control several SGWs.
  • the core network equipment and eNB communicate using the S1 interface, and eNBs communicate using the X2 interface.
  • the LTE R17 protocol version introduces the user plane integrity protection (UPIP) function, which introduces three bearer level user plane integrity protection policies (required, prefer, not need), including the mandatory required policy.
  • UPIP user plane integrity protection
  • the source base station When the user equipment has a bearer with the UPIP function enabled with the required policy, the source base station directly switches to the target base station after determining the target base station with the best signal quality.
  • the target base station does not support the UPIP function, the target base station cannot identify the protocol information element, which will cause the handover failure and affect the network performance.
  • the present application provides a cell switching method and device for improving network performance.
  • a first aspect of the present application provides a cell switching method, the method comprising: when a terminal device meets a cell switching condition, a first access network device determines a second access network device, the second access network device is the access network device with the highest switching priority within a preset range, the terminal device is connected to the first access network device, and the terminal device has a bearer of a user plane integrity protection UPIP function; the first access network device determines whether the second access network device supports the UPIP function; when the second access network device does not support the UPIP function, the first access network device determines a third access network device, the switching priority of the third access network device is lower than that of the second access network device; the first access network device determines whether the third access network device supports the UPIP function; when the third access network device supports the UPIP function, the first access network device switches the terminal device to the third access network device.
  • the first access network device determines that the terminal device with a UPIP function needs to switch cells
  • the second access network device with the highest signal switching priority within the preset range first determine whether the second access network device supports the UPIP function.
  • the second access network device does not support the UPIP function, reselect a third access network device with a lower priority than the second access network device among the access network devices supporting the UPIP function within the preset range as the switching target, and then switch the terminal device to the third access network device. Since the third access network device supports the UPIP function, it can identify the protocol information element, and the signal quality of the third access network device is higher than that of the first access network device, the network performance can be improved.
  • the above-mentioned step of the first access network device determining whether the second access network device supports the UPIP function includes: the first access network device obtains the protocol version of the second access network device from local data; the first access network device determines whether the protocol version of the second access network device supports the UPIP function; when the protocol version of the second access network device supports the UPIP function, the first access network device determines that the second access network device supports the UPIP function; when the protocol version of the second access network device does not support the UPIP function, the first access network device determines that the second access network device does not support the UPIP function.
  • the second access network device exchanges data with the first access network device through the X2 interface when it is established, that is, the local data of the first access network device has stored the protocol version of the second access network device, then when it is necessary to determine whether the second access network device supports the UPIP function, the first access network device can obtain the protocol version of the second access network device from the local data, and then determine whether the protocol version of the second access network device supports the UPIP function, that is, when the protocol version of the second access network device supports the UPIP function, the second access network device supports the UPIP function, and when the protocol version of the second access network device does not support the UPIP function, the second access network device The second access network device does not support the UPIP function. Whether the second access network device supports the UPIP function is directly determined from local data to improve the efficiency of cell switching.
  • the method before the first access network device switches the terminal device to the third access network device, the method further includes: the first access network device sends a switching request to the third access network device, the switching request includes context information of the UPIP function; the first access network device receives a switching response from the third access network device, the switching response is determined by the third access network device based on the context information; when the switching response is to agree to the switching, the step of triggering the first access network device to switch the terminal device to the third access network device.
  • the first access network device determines to switch the terminal device to the third access network device, it also needs to determine whether the switch is possible with the third access network device, that is, send a switching request with context information of the bearer of the UPIP function to the third access network device, and the third access network device can determine whether the terminal device is accessible based on the context information, and then feedback the switching response to the first access network device.
  • the switching response indicates that the third access network device agrees to the switching
  • the first access network device can switch the terminal device to the third access network device, thereby improving the feasibility of the solution.
  • the above-mentioned step of the first access network device determining whether the second access network device supports the UPIP function includes: the first access network device sends a first switching request to the core network device, instructing the terminal device to switch to the second access network device; the first access network device receives a first switching command from the core network device; the first access network device determines whether the first switching command includes a security result information element; when the first switching command does not include a security result information element, the first access network device determines that the second access network device does not support the UPIP function; when the first switching command includes a security result information element, the first access network device determines that the second access network device supports the UPIP function.
  • the first access network device cannot interact with the second access network device through the X2 interface, and needs to determine whether the second access network device supports the UPIP function through the core network device.
  • the first access network device can send a first switching request to the core network device, notifying the core network device that the terminal device needs to be switched to the second access network device.
  • the core network device can send a switching request to the second access network device and receive a switching request response fed back from the second access network device, and then the core network device feeds back a first switching command to the first access network device, wherein when the second access network device does not support the UPIP function, the first switching command does not carry a security result information element, and when the second access network device supports the UPIP function, the first switching command carries the security result information element, that is, the first access network device can determine whether the second access network device supports the UPIP function according to whether the first switching command carries a security result information element.
  • the S1 interface is used to determine whether the second access network device supports the UPIP function, thereby improving the flexibility of the solution.
  • the method further includes: when the third access network device does not support the UPIP function, the first access network device determines a fourth access network device, and the switching priority of the fourth access network device is lower than that of the third access network device; the first access network device sends a second switching request to the core network device, instructing the terminal device to switch to the fourth access network device; the first access network device receives a second switching command from the core network device; the first access network device determines whether the second switching command includes a security result information element; when the second switching command includes a security result information element, the first access network device determines that the fourth access network device supports the UPIP function; the first access network device switches the terminal device to the fourth access network device.
  • the first access network device may also send a second switching request to the core network device to notify the core network that the terminal device is expected to switch to the fourth access network device.
  • the core network device may send a switching request to the fourth access network device and receive a switching request response fed back from the fourth access network device. Then the core network device feeds back a second switching command to the first access network device.
  • the second switching command carries the security result information element
  • the fourth access network device is determined to be the terminal device to be switched in the end, so as to avoid the access network device not supporting the UPIP function affecting the user experience.
  • the method further includes: when the second switching command does not include a security result information element, the first access network device determines that the fourth access network device does not support the UPIP function; the first access network device selects a new access network device in descending order of switching priority and requests switching to the core network device.
  • the first access network device selects new access network devices as the expected switching targets for the core network device in descending order according to the switching priority. Multiple judgments are made to increase the probability of determining the target of the access network device supporting the UPIP function, thereby improving the user call experience.
  • the second aspect of the present application provides a communication device that can implement the method in the first aspect or any possible implementation of the first aspect.
  • the device includes corresponding units or modules for executing the above method.
  • the units or modules included in the device can be implemented by software and/or hardware.
  • the device can be, for example, an access network device, or a chip, a chip system, or a processor that supports the access network device to implement the above method, or a logic module or software that can implement all or part of the functions of the access network device.
  • the present application provides a computer device, including: a processor, the processor is coupled to a memory, the memory is used to store instructions, and when the instructions are executed by the processor, the computer device implements the method in the first aspect or any possible implementation of the first aspect.
  • the computer device may be, for example, an access network device, or a chip or chip system that supports the access network device to implement the above method.
  • a fourth aspect of the present application provides a computer-readable storage medium, which stores instructions. When the instructions are executed by a processor, the method provided by the first aspect or any possible implementation method of the first aspect is implemented.
  • a fifth aspect of the present application provides a computer program product, which includes a computer program code.
  • the computer program code When executed on a computer, it implements the method provided by the first aspect or any possible implementation method of the first aspect.
  • FIG1 is a diagram of a network system architecture provided by an embodiment of the present application.
  • FIG2 is a schematic diagram of a flow chart of a cell switching method provided in an embodiment of the present application.
  • FIG3 is a schematic diagram of an X2 handover process provided in an embodiment of the present application.
  • FIG4 is a schematic diagram of an S1 switching process provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of the structure of a cell switching device provided in an embodiment of the present application.
  • FIG6 is a schematic diagram of the structure of a computer device provided in an embodiment of the present application.
  • the present application provides a cell switching method and device for improving network performance.
  • the access network device sends measurement configuration information (measurement configuration information) to the terminal device, and the measurement configuration information may include information such as measurement object (measurement object, MO), measurement configuration (quantity configuration), and measurement interval configuration.
  • the measurement parameters of the measurement object may include the configuration of the measurement resources on the frequency point corresponding to the measurement object, such as one or more cells on the frequency point, that is, the measurement parameters of the measurement object sent by the access network device to the terminal device may include a cell list, and the cell list includes one or more cells on the frequency point.
  • the terminal device performs cell measurement based on the measurement configuration information and reports the measurement results to the access network device.
  • the measurement results may include the terminal device measuring and calculating the reference signal received power (RSRP), reference signal received quality (RSRQ), received signal strength indicator (RSSI), and signal to interference noise ratio (SINR) of multiple cells based on the reference signals from multiple cells.
  • the access network device determines the switching priority of each cell based on the measurement results of the serving cell and the measurement results of the neighboring cells, and can switch the terminal device to a cell with a high switching priority.
  • the access network device in the embodiment of the present application may be a base station, which may be used to communicate with one or more user devices, or may be used to communicate with one or more base stations having partial user device functions (such as communication between a macro base station and a micro base station, such as an access point); the terminal device is a user device, which may be used to communicate with one or more user devices (such as D2D communication), or may be used to communicate with one or more base stations.
  • a base station which may be used to communicate with one or more user devices, or may be used to communicate with one or more base stations having partial user device functions (such as communication between a macro base station and a micro base station, such as an access point)
  • the terminal device is a user device, which may be used to communicate with one or more user devices (such as D2D communication), or may be used to communicate with one or more base stations.
  • the user device may also be referred to as a user terminal, and may include some or all of the functions of a system, a user unit, a user station, a mobile station, a mobile wireless terminal, a mobile device, a node, a device, a remote station, a remote terminal, a terminal, a wireless communication device, a wireless communication device, or a user agent.
  • the user device may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a smart phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a laptop computer, a handheld communication device, a handheld computing device, a satellite wireless device, a wireless modem card, and/or other processing devices for communicating on a wireless system.
  • a base station may also be referred to as an access point, a node, a node B, an evolved node B, or some other network entity, and may include some or all of the functions of the above network entities.
  • a base station may communicate with a wireless terminal over an air interface. The communication may be performed through one or more sectors.
  • a base station may act as a router between a wireless terminal and the rest of an access network by converting received air interface frames into internet protocol (IP) packets, wherein the access network includes an IP network.
  • IP internet protocol
  • a base station may also coordinate the management of air interface attributes, and may also be a gateway between a wired network and a wireless network.
  • UE 1100 includes at least one processor 1101, at least one memory 1102, and at least one transceiver 1103.
  • UE 1100 may also include an output device 1104 and an input device 1105.
  • Processor 1101, memory 1102, and transceiver 1103 are connected via a bus.
  • Processor 1101 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.
  • Processor 1101 may also be multiple processors, each of which may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, and/or processing cores for processing data (such as computer program instructions).
  • the memory 1102 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the memory 1102 may exist independently and be connected to the processor 1101 through a bus.
  • the memory 1102 may also be integrated with the processor 1101.
  • the memory 1102 is used to store the application program code for executing the solution of the present application, and the execution is controlled by the processor 1101.
  • the processor 1101 is used to execute the computer program code stored in the memory 1102, so as to implement the method described in the embodiment of the present application.
  • the transceiver 1103 may use any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.
  • the transceiver 1103 includes a transmitter Tx and a receiver Rx.
  • the output device 1104 communicates with the processor 401 and can display information in a variety of ways.
  • the output device 1104 can 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 1105 communicates with the processor 1101 and can receive user input in a variety of ways.
  • the input device 1105 can be a mouse, a keyboard, a touch screen device, or a sensor device.
  • the eNB 1200 includes: at least one processor 1201, at least one memory 1202, at least one transceiver 1203 and at least one network interface 1204.
  • the network interface 1204 is used to connect to the network interface 1303 of the core network device 1300 through a link (e.g., S1 interface), or to connect to the network interface 1204 of other eNBs through a wired or wireless link (e.g., X2 interface).
  • the functions of each component inside the eNB 1200 refer to the functional description of each component inside the UE 1100, and will not be repeated here.
  • the core network device 1300 can provide further network connections, such as a telephone network and/or a data communication network (such as the Internet).
  • the core network device 1300 includes: at least one processor 1301, at least one memory 1302, and at least one network interface 1303.
  • the functions of each component in the core network device 1300 refer to the functional description of each component in the UE 1100, and will not be repeated here.
  • the core network equipment and eNB use the S1 interface for communication, and the eNBs use the X2 interface for communication.
  • the LTE R17 protocol version introduces the user plane integrity protection (UPIP) function, which introduces three bearer levels.
  • UPIP user plane integrity protection
  • User surface protection strategy (required, prefer, not need), including the mandatory required strategy.
  • the source base station directly switches to the target base station after determining the target base station with the best signal quality.
  • the target base station cannot recognize the protocol information element, which will cause the handover to fail and affect the network performance.
  • an embodiment of the present application provides a cell switching method, which is described as follows.
  • FIG. 2 is a schematic diagram of a flow chart of a cell switching method provided in an embodiment of the present application, the method comprising:
  • Step 201 When the terminal device meets the cell switching conditions, the first access network device determines the second access network device, the second access network device is the access network device with the highest switching priority within the preset range, the terminal device is connected to the first access network device, and the terminal device has a user UPIP function bearer.
  • the first access network device can determine a switching priority list for neighboring cells within a preset range, and the switching priority list includes cells of various switching priorities, that is, cells with higher switching priorities can provide better user experience for the terminal device.
  • the access network device with the highest switching priority (such as the second access network device) can be selected as the target access network device.
  • the terminal device in the embodiment of the present application carries the required policy, that is, the UPIP function is used.
  • Step 202 The first access network device determines whether the second access network device supports the UPIP function.
  • the target access network device to be switched since the terminal device has a bearer using the UPIP function, the target access network device to be switched also needs to support the UPIP function, that is, the first access network device also needs to determine whether the second access network device supports the UPIP function before determining the switch to meet the normal use of the bearer using the UPIP function.
  • the cell switching in the embodiment of the present application is X2 switching.
  • the S1 interface can be used for switching, that is, the cell switching in the embodiment of the present application is S1 switching.
  • the second access network device exchanges data with the first access network device through the X2 interface when it is established, that is, the protocol version of the second access network device has been stored in the local data of the first access network device.
  • the first access network device can obtain the protocol version of the second access network device from the local data, and then determine whether the protocol version of the second access network device supports the UPIP function, that is, when the protocol version of the second access network device supports the UPIP function, the second access network device supports the UPIP function, and when the protocol version of the second access network device does not support the UPIP function, the second access network device does not support the UPIP function.
  • the first access network device can also obtain the protocol version of the third access network device from local data, and then determine whether the protocol version of the third access network device supports the UPIP function.
  • the first access network device cannot interact with the second access network device through the X2 interface, and needs to determine whether the second access network device supports the UPIP function through the core network device.
  • the first access network device can send a first switching request to the core network device to notify the core network device that the terminal device needs to be switched to the second access network device.
  • the core network device can send a switching request to the second access network device and receive a switching request response fed back from the second access network device.
  • the core network device feeds back a first switching command to the first access network device, wherein when the second access network device does not support the UPIP function, the first switching command does not carry a security result (security result) information element, and when the second access network device supports the UPIP function, the first switching command carries the security result information element, that is, the first access network device can determine whether the second access network device supports the UPIP function according to whether the first switching command carries the security result information element.
  • the first access network device can also send a switching request to the core network device to request switching to the third access network device, and then determine whether the switching command fed back by the core network carries a security result element to determine whether the third access network device supports the UPIP function.
  • the first access network device may also send a second switching request to the core network device to notify the core network that the terminal device is expected to switch to the fourth access network device.
  • the core network device may send a switching request to the fourth access network device and receive a switching request response fed back from the fourth access network device. Then the core network device feeds back a second switching command to the first access network device.
  • the second switching command carries the security result information element, the fourth access network device is determined to be the terminal device to be finally switched.
  • the first access network device switches in descending order according to the switching priority. Select the new access network device as the expected switching target for the core network device.
  • Step 203 When the second access network device does not support the UPIP function, the first access network device determines a third access network device, and the switching priority of the third access network device is lower than that of the second access network device.
  • the first access network device can select a suboptimal access network device from the switching priority list, that is, select a third access network device with a lower switching priority than the second access network device as the switching target.
  • Step 204 The first access network device determines whether the third access network device supports the UPIP function.
  • the third access network device after selecting the third access network device, it is necessary to continue to determine whether the third access network device can support the UPIP bearer of the terminal device, that is, whether it supports the UPIP function.
  • Step 205 When the third access network device supports the UPIP function, the first access network device switches the terminal device to the third access network device.
  • the first access network device can determine that the terminal device can be switched to the third access network device, and the first access network device can send a radio resource control (RRC) connection reconfiguration message to the terminal device to notify the terminal device to switch to the third access network device.
  • RRC radio resource control
  • the first access network device After the first access network device determines to switch the terminal device to the third access network device, it also needs to determine with the third access network device whether the switch is possible, that is, send a switching request carrying context information of the UPIP function to the third access network device.
  • the third access network device can determine whether the terminal device can access based on the context information, and then feedback the switching response to the first access network device.
  • the switching response indicates that the third access network device agrees to the switching, the first access network device can switch the terminal device to the third access network device.
  • the processing flow of the embodiment of the present application can be shown in FIG3, step 301.
  • the first access network device determines the second access network device; step 302.
  • the first access network device determines whether the second access network device supports the UPIP function according to the protocol version of the second access network device in the local data; step 303.
  • the first access network device determines the third access network device; step 304.
  • the first access network device determines whether the third access network device supports the UPIP function; step 305.
  • the third access network device supports the UPIP function
  • the first access network device sends a handover request to the third access network device; step 306.
  • the third access network device feeds back a handover request response to the first access network device; step 307.
  • the handover request response is to agree to the handover
  • the first access network device sends an RRC connection reconfiguration message to the third access network device to the terminal device.
  • the subsequent process can refer to the processing flow for X2 handover in 3GPP 36.423.
  • the processing flow of the embodiment of the present application can be shown in Figure 4, step 401.
  • the first access network device determines the second access network device; step 402.
  • the first access network device sends a first switching request to the second access network device to the core network device; step 403.
  • the core network device sends a third switching request to the second access network device; step 404.
  • the second access network device sends a third switching request response to the core network device; step 405.
  • the core network device sends a first switching command to the first access network device according to the third switching request response; step 406.
  • the first access network device determines the third access network device as the expected switching target; step 407.
  • the first access network device sends a fourth switching request to the third access network device to the core network device; step 408.
  • the core network device sends a fifth switching request to the third access network device; step 409.
  • the third access network device feeds back a fifth switching request response to the core network device; step 410.
  • the core network sends a fourth switching command to the first access network device according to the fifth switching request response; step 411.
  • the fourth switching command includes a security result information element
  • the first access network device sends an RRC connection reconfiguration message to the third access network device to the terminal device.
  • the subsequent process can refer to the processing flow for X2 switching in 3GPP 36.423.
  • the first access network device determines that the UE with a UPIP function needs to switch cells
  • the second access network device with the highest signal switching priority within a preset range first determine whether the second access network device supports the UPIP function.
  • the second access network device does not support the UPIP function, reselect a third access network device with a lower priority than the second access network device among the access network devices supporting the UPIP function within the preset range as the switching target, and then switch the terminal device to the third access network device. Since the third access network device supports the UPIP function, it can identify the protocol information element, and the signal quality of the third access network device is higher than that of the first access network device, the network performance can be improved.
  • the cell switching method is described above, and the device for executing the method is described below.
  • FIG. 5 shows a cell switching device provided by an embodiment of the present application.
  • the device 50 includes:
  • Processing unit 501 is used to determine a second access network device when the terminal device meets the cell switching condition, the second access network device is the access network device with the highest switching priority within a preset range, the terminal device is connected to the device, and the terminal device has a bearer of the user plane integrity protection UPIP function, judge whether the second access network device supports the UPIP function, when the second access network device does not support the UPIP function, determine a third access network device, the switching priority of the third access network device is lower than the second access network device, judge whether the third access network device supports the UPIP function, and when the third access network device supports the UPIP function, switch the terminal device to the third access network device.
  • the processing unit 501 is used to execute steps 201 to 205 in the method embodiment of FIG. 2 .
  • processing unit 501 is specifically configured to:
  • the protocol version of the second access network device does not support the UPIP function, it is determined that the second access network device does not support the UPIP function.
  • the device 50 further includes a transceiver unit 502, and the transceiver unit 502 is specifically configured to:
  • the terminal device is switched to the third access network device.
  • the device 50 further includes a transceiver unit 502, and the transceiver unit 502 is specifically configured to:
  • the processing unit 501 is specifically used for:
  • the second access network device supports the UPIP function.
  • processing unit 501 is further configured to:
  • the switching priority of the fourth access network device is lower than that of the third access network device
  • the transceiver unit 502 is also used for:
  • the processing unit 501 is further configured to:
  • the second switching command includes a security result information element, determining that the fourth access network device supports the UPIP function;
  • processing unit 501 is further configured to:
  • a new access network device is selected in descending order of switching priority to request switching to the core network device.
  • FIG6 shows a possible logical structure diagram of a computer device 60 provided in an embodiment of the present application.
  • the computer device 60 includes: a processor 601, a communication interface 602, a storage system 603 and a bus 604.
  • the processor 601, the communication interface 602 and the storage system 603 are interconnected via the bus 604.
  • the processor 601 is used to control and manage the actions of the computer device 60.
  • the processor 601 is used to execute the steps performed by the first access network device in the method embodiment of FIG2.
  • the communication interface 602 is used to support the computer device 60 to communicate.
  • the storage system 603 is used to store program codes and data of the computer device 60.
  • the processor 601 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application.
  • the processor 601 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like.
  • the bus 604 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (Extended Industrial Architecture) bus. Industry Standard Architecture, EISA) bus, etc.
  • PCI peripheral component interconnect
  • EISA Extended Industrial Architecture
  • the bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in FIG6 , but it does not mean that there is only one bus or one type of
  • the transceiver unit 502 in the apparatus 50 is equivalent to the communication interface 602 in the computer device 60
  • the processing unit 501 in the apparatus 50 is equivalent to the processor 601 in the computer device 60 .
  • the computer device 60 of this embodiment may correspond to the first access network device in the method embodiment of FIG. 2 .
  • the communication interface 602 in the computer device 60 may implement the functions and/or various steps of the first access network device in the method embodiment of FIG. 2 . For the sake of brevity, they will not be described in detail here.
  • each unit in the above device can be fully or partially integrated into one physical entity, or they can be physically separated.
  • the units in the device can all be implemented in the form of software calling through processing elements; they can also be all implemented in the form of hardware; some units can also be implemented in the form of software calling through processing elements, and some units can be implemented in the form of hardware.
  • each unit can be a separately established processing element, or it can be integrated in a certain chip of the device.
  • it can also be stored in the memory in the form of a program, and called and executed by a certain processing element of the device. The function of the unit.
  • each step of the above method or each unit above can be implemented by an integrated logic circuit of hardware in the processor element or in the form of software calling through a processing element.
  • the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASIC), or one or more digital singnal processors (DSP), or one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuit forms.
  • ASIC application specific integrated circuits
  • DSP digital singnal processors
  • FPGA field programmable gate arrays
  • the unit in the device can be implemented in the form of a processing element scheduler
  • the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call a program.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • a computer-readable storage medium in which computer-executable instructions are stored.
  • the processor of the device executes the computer-executable instructions
  • the device executes the method executed by the inspection device in the above method embodiment.
  • a computer program product comprising computer executable instructions stored in a computer readable storage medium.
  • the processor of the device executes the computer executable instructions
  • the device executes the method executed by the checking device in the above method embodiment.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium.
  • the content includes several instructions for making a computer device (which may be a personal computer, a server, or an access network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk and other media that can store program codes.

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Abstract

本申请公开了一种小区切换方法以及装置，该方法包括：第一接入网设备确定有UPIP功能的承载的终端设备需要切换小区时，在确定预设范围内信号切换优先级最高的第二接入网设备时，先确定该第二接入网设备是否支持UPIP功能，当该第二接入网设备不支持UPIP功能时，重新选择在预设范围内支持UPIP功能的接入网设备中优先级低于该第二接入网设备的第三接入网设备作为切换目标，再将终端设备切换到该第三接入网设备。由于第三接入网设备支持UPIP功能，可以识别协议信元，且该第三接入网设备的信号质量高于第一接入网设备，则可以提高网络性能。

Description

一种小区切换方法以及装置
本申请要求于2022年12月22日提交国家知识产权局、申请号为202211659074.7、申请名称为“一种小区切换方法以及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及一种小区切换方法以及装置。
背景技术
在长期演进(long term evolution，LTE)网络中，包括核心网设备和演进基站(eNodeB，eNB)。核心网设备包括移动管理实体(mobility management entity，MME)和用户面处理网关(serving gateway，SGW)。MME属于控制面部分，负责控制面的移动性管理，包括用户上下文和移动状态管理，分配用户临时身份标识等；SGW属于用户面部分，负责空闲状态时为下行数据发起寻呼，管理保存IP承载参数和网络内路由信息等；MME与SGW之间呈网状连接，一个MME可以控制若干个SGW。核心网设备与eNB之间使用S1接口进行通信，eNB之间使用X2接口进行通信。LTE R17协议版本引入用户面完整性保护(user plane integrity protection，UPIP)功能，该功能引入三种承载级别用户面完保策略(required,prefer,not need)，其中包括强制要求执行的required策略。
用户设备存在以required策略生效UPIP功能的承载时，源基站在确定信号质量最优的目标基站后，直接向该目标基站进行切换。
但是，当目标基站不支持UPIP功能时，该目标基站无法识别协议信元，会导致切换失败，影响网络性能。
发明内容
本申请提供了一种小区切换方法以及装置，用于提高网络性能。
本申请第一方面提供了一种小区切换方法，该方法包括：当终端设备满足小区切换条件时，第一接入网设备确定第二接入网设备，第二接入网设备为在预设范围内切换优先级最高的接入网设备，终端设备与第一接入网设备连接，且终端设备存在用户面完整性保护UPIP功能的承载；第一接入网设备判断第二接入网设备是否支持UPIP功能；当第二接入网设备不支持UPIP功能时，第一接入网设备确定第三接入网设备，第三接入网设备的切换优先级低于第二接入网设备；第一接入网设备判断第三接入网设备是否支持UPIP功能；当第三接入网设备支持UPIP功能时，第一接入网设备将终端设备切换至第三接入网设备。
上述方面中，第一接入网设备确定有UPIP功能的承载的终端设备需要切换小区时，在确定预设范围内信号切换优先级最高的第二接入网设备时，先确定该第二接入网设备是否支持UPIP功能，当该第二接入网设备不支持UPIP功能时，重新选择在所述预设范围内支持UPIP功能的接入网设备中优先级低于该第二接入网设备的第三接入网设备作为切换目标，再将终端设备切换到该第三接入网设备。由于第三接入网设备支持UPIP功能，可以识别协议信元，且该第三接入网设备的信号质量高于第一接入网设备，则可以提高网络性能。
一种可能的实施方式中，上述步骤第一接入网设备判断第二接入网设备是否支持UPIP功能包括：第一接入网设备从本地数据获取第二接入网设备的协议版本；第一接入网设备判断第二接入网设备的协议版本是否支持UPIP功能；当第二接入网设备的协议版本支持UPIP功能时，第一接入网设备确定第二接入网设备支持UPIP功能；当第二接入网设备的协议版本不支持UPIP功能时，第一接入网设备确定第二接入网设备不支持UPIP功能。
上述可能的实施方式中，第二接入网设备在建立时就通过X2接口与第一接入网设备进行数据交换，即第一接入网设备的本地数据中已经存储了该第二接入网设备的协议版本，则当需要判断第二接入网设备是否支持UPIP功能时，第一接入网络设备可以从本地数据中获取该第二接入网设备的协议版本，再判断该第二接入网设备的协议版本是否支持UPIP功能，即当第二接入网设备的协议版本支持UPIP功能时，该第二接入网设备支持UPIP功能，当第二接入网设备的协议版本不支持UPIP功能时，该第二接入 网设备不支持UPIP功能。直接从本地数据确定第二接入网设备是否支持UPIP功能，提高小区切换效率。
一种可能的实施方式中，在第一接入网设备将终端设备切换至第三接入网设备之前，该方法还包括：第一接入网设备向第三接入网设备发送切换请求，切换请求包括UPIP功能的承载的上下文信息；第一接入网设备接收来自第三接入网设备的切换响应，切换响应为第三接入网设备根据上下文信息确定的；当切换响应为同意切换时，触发第一接入网设备将终端设备切换至第三接入网设备的步骤。
上述可能的实施方式中，第一接入网设备在确定将终端设备切换至第三接入网设备后，还需要向该第三接入网设备确定是否可以切换，即向该第三接入网设备发送有UPIP功能的承载的上下文信息的切换请求，第三接入网设备可以根据该上下文信息确定该终端设备是否可以接入，然后向第一接入网设备反馈切换响应。当该切换响应指示第三接入网设备同意切换时，第一接入网设备才可以将终端设备切换到该第三接入网设备，提高方案的可行性。
一种可能的实施方式中，上述步骤第一接入网设备判断第二接入网设备是否支持UPIP功能包括：第一接入网设备向核心网设备发送第一切换请求，指示终端设备切换到第二接入网设备；第一接入网设备接收来自核心网设备的第一切换命令；第一接入网设备判断第一切换命令是否包括安全结果信元；当第一切换命令不包括安全结果信元时，第一接入网设备确定第二接入网设备不支持UPIP功能；当第一切换命令包括安全结果信元时，第一接入网设备确定第二接入网设备支持UPIP功能。
上述可能的实施方式中，第一接入网设备无法通过X2接口与第二接入网设备交互，需要通过核心网设备判断该第二接入网设备是否支持UPIP功能。第一接入网设备可以向核心网设备发送第一切换请求，通知核心网设备需要将该终端设备切换到该第二接入网设备。核心网设备在收到该第一切换请求后，可以向第二接入网设备发送切换请求，并接收来自第二接入网设备反馈的切换请求响应，然后核心网设备再向第一接入网设备反馈第一切换命令，其中，当第二接入网设备不支持UPIP功能时，该第一切换命令中不携带安全结果信元，当第二接入网设备支持UPIP功能时，该第一切换命令中携带了该安全结果信元，即第一接入网设备可以根据该第一切换命令是否携带安全结果信元来确定该第二接入网设备是否支持UPIP功能。当X2接口不可用时通过S1接口确定第二接入网设备是否支持UPIP功能，提高方案的灵活性。
一种可能的实施方式中，在第一接入网设备判断第三接入网设备是否支持UPIP功能之后，该方法还包括：当第三接入网设备不支持UPIP功能时，第一接入网设备确定第四接入网设备，第四接入网设备的切换优先级低于第三接入网设备；第一接入网设备向核心网设备发送第二切换请求，指示终端设备切换到第四接入网设备；第一接入网设备接收来自核心网设备的第二切换命令；第一接入网设备判断第二切换命令是否包括安全结果信元；当第二切换命令包括安全结果信元时，第一接入网设备确定第四接入网设备支持UPIP功能；第一接入网设备将终端设备切换至第四接入网设备。
上述可能的实施方式中，当第三接入网设备依旧不支持UPIP功能时，第一接入网设备还可以向核心网设备发送第二切换请求，通知核心网该终端设备预计切换到第四接入网设备。核心网设备在收到该第一切换请求后，可以向该第四接入网设备发送切换请求，并接收来自第四接入网设备反馈的切换请求响应，然后核心网设备再向第一接入网设备反馈第二切换命令，在该第二切换命令携带该安全结果信元时，才确定该第四接入网设备为最终要切换的终端设备，避免接入网设备不支持UPIP功能影响用户体验。
一种可能的实施方式中，该方法还包括：当第二切换命令不包括安全结果信元时，第一接入网设备确定第四接入网设备不支持UPIP功能；第一接入网设备按照切换优先级降序选取新的接入网设备向核心网设备请求切换。
上述可能的实施方式中，如果该第二切换命令仍然不携带该安全结果信元，则第一接入网设备按照切换优先级从高到低依次选择新的接入网设备作为预计的切换目标给核心网设备。多次判断，提高确定支持UPIP功能的接入网设备的目标的概率，提高用户通话体验。
本申请第二方面提供了一种通信装置，可以实现上述第一方面或第一方面中任一种可能的实施方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。该装置例如可以为接入网设备，也可以为支持接入网设备实现上述方法的芯片、芯片***、或处理器等，还可以为能实现全部或部分接入网设备功能的逻辑模块或软件。
本申请第三方面提供了一种计算机设备，包括：处理器，该处理器与存储器耦合，该存储器用于存储指令，当指令被处理器执行时，使得该计算机设备实现上述第一方面或第一方面中任一种可能的实施方式中的方法。该计算机设备例如可以为接入网设备，也可以为支持接入网设备实现上述方法的芯片或芯片***等。
本申请第四方面提供了一种计算机可读存储介质，该计算机可读存储介质中保存有指令，当该指令被处理器执行时，实现前述第一方面或第一方面任一种可能的实施方式提供的方法。
本申请第五方面提供了一种计算机程序产品，计算机程序产品中包括计算机程序代码，当该计算机程序代码在计算机上执行时，实现前述第一方面或第一方面任一种可能的实施方式提供的方法。
附图说明
图1为本申请实施例提供的一种网络***架构图；
图2为本申请实施例提供的一种小区切换方法的流程示意图；
图3为本申请实施例提供的一种X2切换处理流程示意图；
图4为本申请实施例提供的一种S1切换处理流程示意图；
图5为本申请实施例提供的一种小区切换装置的结构示意图；
图6为本申请实施例提供的一种计算机设备的结构示意图。
具体实施方式
本申请提供了一种小区切换方法以及装置，用于提高网络性能。
下面结合附图，对本申请的实施例进行描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。本领域普通技术人员可知，随着技术的发展和新场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、***、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
在这里专用的词“示例性”意为“用作例子、实施例或说明性”。这里作为“示例性”所说明的任何实施例不必解释为优于或好于其它实施例。
另外，为了更好的说明本申请，在下文的具体实施方式中给出了众多的具体细节。本领域技术人员应当理解，没有某些具体细节，本申请同样可以实施。在一些实例中，对于本领域技术人员熟知的方法、手段、元件和电路未作详细描述，以便于凸显本申请的主旨。
下面对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
由于终端设备的移动，终端设备可能从一个小区的覆盖范围移动到另一个小区的覆盖范围。每个小区可通过一个唯一的编号来标识，该编号称为小区标识(cell identity，Cell ID)。本申请文件中，Cell ID以标准定义的小区全局标识(cell global identity，CGI)为例进行描述。接入网设备向终端设备发送测量配置信息(measurement configuration information)，该测量配置信息可包括测量对象(measurement object，MO)、测量配置(quantity configuration)、测量间隔配置等信息。测量对象的测量参数可包括该测量对象对应的频点上测量资源的配置，例如该频点上的一个或多个小区等，即接入网设备向终端设备发送的测量对象的测量参数可包括小区列表，该小区列表包括该频点上的一个或多个小区。终端设备基于测量配置信息进行小区测量，并向接入网设备上报测量结果。该测量结果可以包括终端设备根据来自多个小区的参考信号，测量和计算多个小区的参考信号的接收功率(reference signal received signal，RSRP)、参考信号接收质量(reference signal received quality，RSRQ)、接收信号强度指示(received signal strength indicator，RSSI)、信干噪比(signal to interference noise ratio，SINR)。接入网设备根据服务小区的测量结果以及邻区的测量结果，确定各个小区的切换优先级，可将终端设备切换到切换优先级高的小区上。
本申请实施例中的接入网络设备可以为基站，基站可以用于与一个或多个用户设备进行通信，也可以用于与一个或多个具有部分用户设备功能的基站进行通信(比如宏基站与微基站，如接入点，之间的通信)；终端设备为用户设备，用户设备可以用于一个或多个用户设备进行通信(比如D2D通信)，也可以用于与一个或多个基站进行通信。用户设备还可以称为用户终端，并且可以包括***、用户单元、用户站、移动站、移动无线终端、移动设备、节点、设备、远程站、远程终端、终端、无线通信设备、无线通信装置或用户代理的功能中的一些或者所有功能。用户设备可以是蜂窝电话、无绳电话、会话发起协议(session initiation protocol，SIP)电话、智能电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、膝上型计算机、手持式通信设备、手持式计算设备、卫星无线设备、无线调制解调器卡和/或用于在无线***上进行通信的其它处理设备。基站还可以称为接入点、节点、节点B、演进型节点B或某种其它网络实体，并且可以包括以上网络实体的功能中的一些或所有功能。基站可以通过空中接口与无线终端进行通信。该通信可以通过一个或多个扇区来进行。基站可以通过将所接收的空中接口帧转换成互联网协议(internet protocol，IP)分组，来用作无线终端和接入网络的其余部分之间的路由器，其中所述接入网络包括IP网络。基站还可以对空中接口属性的管理进行协调，并且还可以是有线网络和无线网络之间的网关。
参照图1中所示为本申请实施例提供的网络***架构图。UE 1100包括至少一个处理器1101、至少一个存储器1102、至少一个收发器1103。可选的，UE 1100还可以包括输出设备1104和输入设备1105。
处理器1101、存储器1102、收发器1103通过总线相连接。处理器1101可以是一个通用中央处理器(central processing unit，CPU)、微处理器、特定应用集成电路(application-specific integrated circuit，ASIC)，或者一个或多个用于控制本申请方案程序执行的集成电路。处理器1101也可以是多个处理器，每一个处理器可以是一个单核(single-CPU)处理器或多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路和/或用于处理数据(例如计算机程序指令)的处理核。
存储器1102可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备、随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器1102可以是独立存在，通过总线与处理器1101相连接。存储器1102也可以和处理器1101集成在一起。其中，存储器1102用于存储执行本申请方案的应用程序代码，并由处理器1101来控制执行。处理器1101用于执行存储器1102中存储的计算机程序代码，从而实现本申请实施例中所述的方法。
收发器1103可以使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网、无线接入网(radio access network，RAN)、无线局域网(wireless local area networks，WLAN)等。收发器1103包括发射机Tx和接收机Rx。
输出设备1104和处理器401通信，可以以多种方式来显示信息。例如，输出设备1104可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备1105和处理器1101通信，可以以多种方式接受用户的输入。例如，输入设备1105可以是鼠标、键盘、触摸屏设备或传感设备等。
eNB 1200包括：至少一个处理器1201、至少一个存储器1202、至少一个收发器1203和至少一个网络接口1204。网络接口1204用于通过链路(例如S1接口)与核心网设备1300的网络接口1303连接，或者通过有线或无线链路(例如X2接口)与其它eNB的网络接口1204进行连接。eNB 1200内部各器件的功能参照对UE 1100内部各器件的功能描述，在此不再赘述。
核心网设备1300可以提供进一步网络连接，例如电话网络和/或数据通信网络(例如Internet)。核心网设备1300包括：至少一个处理器1301、至少一个存储器1302和至少一个网络接口1303。核心网设备1300内部各器件的功能参照对UE 1100内部各器件的功能描述，在此不再赘述。
核心网设备与eNB之间使用S1接口进行通信，eNB之间使用X2接口进行通信。LTE R17协议版本引入用户面完整性保护(user plane integrity protection，UPIP)功能，该功能引入三种承载级别用 户面完保策略(required,prefer,not need)，其中包括强制要求执行的required策略。用户设备存在以required策略生效UPIP功能的承载时，源基站在确定信号质量最优的目标基站后，直接向该目标基站进行切换。但是，当目标基站不支持UPIP功能时，该目标基站无法识别协议信元，会导致切换失败，影响网络性能。
为解决上述问题，本申请实施例提供了一种小区切换方法，该方法如下所述。
请参阅图2，如图2所示为本申请实施例提供的一种小区切换方法的流程示意图，该方法包括：
步骤201.当终端设备满足小区切换条件时，第一接入网设备确定第二接入网设备，第二接入网设备为在预设范围内切换优先级最高的接入网设备，终端设备与第一接入网设备连接，且终端设备存在用户UPIP功能的承载。
本实施例中，第一接入网设备在收到终端设备发送的测量结果后，可以对在预设范围内的邻区确定切换优先级列表，该切换优先级列表包括各个切换优先级的小区，即切换优先级越高的小区可以为终端设备提供更好的用户体验。当第一接入网设备连接的终端设备满足小区切换条件，即存在切换优先级列表时，为了给用户提供最好的服务，可以选择切换优先级最高的接入网设备(如第二接入网设备)作为目标接入网络设备。本申请实施例中的终端设备存在required策略的承载，即使用了UPIP功能。
步骤202.第一接入网设备判断第二接入网设备是否支持UPIP功能。
本实施例中，由于该终端设备有使用UPIP功能的承载，因此切换的目标接入网设备也需要支持UPIP功能，即第一接入网设备在确定切换之前还需要确定该第二接入网设备是否支持UPIP功能，以满足该使用UPIP功能的承载的正常使用。
其中，由于第一接入网设备与第二接入网设备之间可以通过X2接口连接，则本申请实施例的小区切换为X2切换，假设第一接入网络设备或第二接入网设备的X2接口不可用，或者X2切换失败，则可以使用S1接口进行切换，即本申请实施例的小区切换为S1切换。
对于X2切换场景，第二接入网设备在建立时就通过X2接口与第一接入网设备进行数据交换，即第一接入网设备的本地数据中已经存储了该第二接入网设备的协议版本，则当需要判断第二接入网设备是否支持UPIP功能时，第一接入网络设备可以从本地数据中获取该第二接入网设备的协议版本，再判断该第二接入网设备的协议版本是否支持UPIP功能，即当第二接入网设备的协议版本支持UPIP功能时，该第二接入网设备支持UPIP功能，当第二接入网设备的协议版本不支持UPIP功能时，该第二接入网设备不支持UPIP功能。
相应的，对于第三接入网设备是否支持UPIP功能，第一接入网设备也同样可以从本地数据中获取该第三接入网设备的协议版本，再确定该第三接入网设备的协议版本是否支持UPIP功能。
对于S1切换场景，第一接入网设备无法通过X2接口与第二接入网设备交互，需要通过核心网设备判断该第二接入网设备是否支持UPIP功能。第一接入网设备可以向核心网设备发送第一切换请求，通知核心网设备需要将该终端设备切换到该第二接入网设备。核心网设备在收到该第一切换请求后，可以向第二接入网设备发送切换请求，并接收来自第二接入网设备反馈的切换请求响应，然后核心网设备再向第一接入网设备反馈第一切换命令，其中，当第二接入网设备不支持UPIP功能时，该第一切换命令中不携带安全结果(security result)信元，当第二接入网设备支持UPIP功能时，该第一切换命令中携带了该安全结果信元，即第一接入网设备可以根据该第一切换命令是否携带安全结果信元来确定该第二接入网设备是否支持UPIP功能。
相应的，对于第三接入网设备是否支持UPIP功能，第一接入网设备也同样可以向核心网设备发送请求切换到第三接入网设备的切换请求，再确定核心网反馈的切换命令中是否携带安全结果信元，来判断第三接入网设备是否支持UPIP功能。
当第三接入网设备依旧不支持UPIP功能时，第一接入网设备还可以向核心网设备发送第二切换请求，通知核心网该终端设备预计切换到第四接入网设备。核心网设备在收到该第一切换请求后，可以向该第四接入网设备发送切换请求，并接收来自第四接入网设备反馈的切换请求响应，然后核心网设备再向第一接入网设备反馈第二切换命令，在该第二切换命令携带该安全结果信元时，才确定该第四接入网设备为最终要切换的终端设备。
如果该第二切换命令仍然不携带该安全结果信元，则第一接入网设备按照切换优先级从高到低依次 选择新的接入网设备作为预计的切换目标给核心网设备。
步骤203.当第二接入网设备不支持UPIP功能时，第一接入网设备确定第三接入网设备，第三接入网设备的切换优先级低于第二接入网设备。
本实施例中，如果确定该第二接入网设备的协议版本不支持UPIP功能，则需要重新选择接入网设备作为切换目标，第一接入网络设备可以从该切换优先级列表中选择次优的接入网络设备，即选择切换优先级低于第二接入网设备的第三接入网设备作为切换目标。
步骤204.第一接入网设备判断第三接入网设备是否支持UPIP功能。
本实施例中，相应的，在选择第三接入网设备之后，需要继续确定该第三接入网设备能否支持该终端设备的UPIP承载，即是否支持UPIP功能。
步骤205.当第三接入网设备支持UPIP功能时，第一接入网设备将终端设备切换至第三接入网设备。
本实施例中，如果确定该第三接入网设备支持UPIP功能，则第一接入网设备可以确定可以将该终端设备切换到该第三接入网设备，第一接入网设备可以向终端设备发送无线资源控制(radio resource control,RRC)连接重新配置(connection reconfiguration)消息，以通知该终端设备切换到第三接入网设备。
第一接入网设备在确定将终端设备切换至第三接入网设备后，还需要向该第三接入网设备确定是否可以切换，即向该第三接入网设备发送有UPIP功能的承载的上下文信息的切换请求，第三接入网设备可以根据该上下文信息确定该终端设备是否可以接入，然后向第一接入网设备反馈切换响应，当该切换响应指示第三接入网设备同意切换时，第一接入网设备才可以将终端设备切换到该第三接入网设备。
对于X2切换场景，本申请实施例的处理流程可以如图3所示，步骤301.当确定终端设备满足小区切换条件时，第一接入网设备确定第二接入网设备；步骤302.第一接入网设备根据本地数据中第二接入网设备的协议版本，判断第二接入网设备是否支持UPIP功能；步骤303.当第二接入网设备不支持UPIP功能时，第一接入网设备确定第三接入网设备；步骤304.第一接入网设备判断第三接入网设备是否支持UPIP功能；步骤305.当第三接入网设备支持UPIP功能时，第一接入网设备向第三接入网设备发送切换请求；步骤306.第三接入网设备向第一接入网设备反馈切换请求响应；步骤307.当该切换请求响应为同意切换时，第一接入网设备向终端设备发送对第三接入网设备的RRC连接重新配置消息。后续的流程可参考3GPP 36.423中针对X2切换的处理流程。
对于S1切换场景，本申请实施例的处理流程可以如图4所示，步骤401.当确定终端设备满足小区切换条件时，第一接入网设备确定第二接入网设备；步骤402.第一接入网设备向核心网设备发送对第二接入网设备的第一切换请求；步骤403.核心网设备向第二接入网设备发送第三切换请求；步骤404.第二接入网设备向核心网设备发送第三切换请求响应；步骤405.核心网设备根据第三切换请求响应向第一接入网设备发送第一切换命令；步骤406.当第一切换命令不包括安全结果信元时，第一接入网设备确定第三接入网设备作为预计切换目标；步骤407.第一接入网设备向核心网设备发送对第三接入网设备的第四切换请求；步骤408.核心网设备向第三接入网设备发送第五切换请求；步骤409.第三接入网设备向核心网设备反馈第五切换请求响应；步骤410.核心网根据第五切换请求响应向第一接入网设备发送第四切换命令；步骤411.当该第四切换命令包括安全结果信元时，第一接入网设备向终端设备发送对第三接入网设备的RRC连接重新配置消息。后续的流程可参考3GPP 36.423中针对X2切换的处理流程。
本申请实施例中，第一接入网设备确定有UPIP功能的承载的UE需要切换小区时，在确定预设范围内信号切换优先级最高的第二接入网设备时，先确定该第二接入网设备是否支持UPIP功能，当该第二接入网设备不支持UPIP功能时，重新选择在所述预设范围内支持UPIP功能的接入网设备中优先级低于该第二接入网设备的第三接入网设备作为切换目标，再将终端设备切换到该第三接入网设备。由于第三接入网设备支持UPIP功能，可以识别协议信元，且该第三接入网设备的信号质量高于第一接入网设备，则可以提高网络性能。
上面讲述了小区切换方法，下面对执行该方法的装置进行描述。
请参阅图5，如图5所示为本申请实施例提供的一种小区切换装置，该装置50包括：
处理单元501，用于当终端设备满足小区切换条件时，确定第二接入网设备，第二接入网设备为在预设范围内切换优先级最高的接入网设备，终端设备与装置连接，且终端设备存在用户面完整性保护UPIP功能的承载，判断第二接入网设备是否支持UPIP功能，当第二接入网设备不支持UPIP功能时，确定第三接入网设备，第三接入网设备的切换优先级低于第二接入网设备，判断第三接入网设备是否支持UPIP功能，当第三接入网设备支持UPIP功能时，将终端设备切换至第三接入网设备。
其中，处理单元501用于执行图2方法实施例中的步骤201至步骤205。
可选的，处理单元501具体用于：
从本地数据获取第二接入网设备的协议版本；
判断第二接入网设备的协议版本是否支持UPIP功能；
当第二接入网设备的协议版本支持UPIP功能时，确定第二接入网设备支持UPIP功能；
当第二接入网设备的协议版本不支持UPIP功能时，确定第二接入网设备不支持UPIP功能。
可选的，装置50还包括收发单元502，收发单元502具体用于：
向第三接入网设备发送切换请求，切换请求包括UPIP功能的承载的上下文信息；
接收来自第三接入网设备的切换响应，切换响应为第三接入网设备根据上下文信息确定的；
当切换响应为同意切换时，将终端设备切换至第三接入网设备。
可选的，装置50还包括收发单元502，收发单元502具体用于：
向核心网设备发送第一切换请求，指示终端设备切换到第二接入网设备；
接收来自核心网设备的第一切换命令；
处理单元501具体用于：
判断第一切换命令是否包括安全结果信元；
当第一切换命令不包括安全结果信元时，确定第二接入网设备不支持UPIP功能；
当第一切换命令包括安全结果信元时，确定第二接入网设备支持UPIP功能。
可选的，处理单元501还用于：
当第三接入网设备不支持UPIP功能时，确定第四接入网设备，第四接入网设备的切换优先级低于第三接入网设备；
收发单元502还用于：
向核心网设备发送第二切换请求，指示终端设备切换到第四接入网设备；
接收来自核心网设备的第二切换命令；
处理单元501还用于：
判断第二切换命令是否包括安全结果信元；
当第二切换命令包括安全结果信元时，确定第四接入网设备支持UPIP功能；
将终端设备切换至第四接入网设备。
可选的，处理单元501还用于：
当第二切换命令不包括安全结果信元时，确定第四接入网设备不支持UPIP功能；
按照切换优先级降序选取新的接入网设备向核心网设备请求切换。
图6所示，为本申请的实施例提供的计算机设备60的一种可能的逻辑结构示意图。计算机设备60包括：处理器601、通信接口602、存储***603以及总线604。处理器601、通信接口602以及存储***603通过总线604相互连接。在本申请的实施例中，处理器601用于对计算机设备60的动作进行控制管理，例如，处理器601用于执行图2的方法实施例中第一接入网设备所执行的步骤。通信接口602用于支持计算机设备60进行通信。存储***603，用于存储计算机设备60的程序代码和数据。
其中，处理器601可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。处理器601也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。总线604可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended  Industry Standard Architecture，EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示，图6中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
装置50中的收发单元502相当于计算机设备60中的通信接口602，装置50中的处理单元501相当于计算机设备60中的处理器601。
本实施例的计算机设备60可对应于上述图2方法实施例中的第一接入网设备，该计算机设备60中的通信接口602可以实现上述图2方法实施例中的第一接入网设备所具有的功能和/或所实施的各种步骤，为了简洁，在此不再赘述。
应理解以上装置中单元的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且装置中的单元可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分单元以软件通过处理元件调用的形式实现，部分单元以硬件的形式实现。例如，各个单元可以为单独设立的处理元件，也可以集成在装置的某一个芯片中实现，此外，也可以以程序的形式存储于存储器中，由装置的某一个处理元件调用并执行该单元的功能。此外这些单元全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件又可以成为处理器，可以是一种具有信号的处理能力的集成电路。在实现过程中，上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路实现或者以软件通过处理元件调用的形式实现。
在一个例子中，以上任一装置中的单元可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(application specific integrated circuit，ASIC)，或，一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(field programmable gate array，FPGA)，或这些集成电路形式中至少两种的组合。再如，当装置中的单元可以通过处理元件调度程序的形式实现时，该处理元件可以是通用处理器，例如中央处理器(central processing unit，CPU)或其它可以调用程序的处理器。再如，这些单元可以集成在一起，以片上***(system-on-a-chip，SOC)的形式实现。
在本申请的另一个实施例中，还提供一种计算机可读存储介质，计算机可读存储介质中存储有计算机执行指令，当设备的处理器执行该计算机执行指令时，设备执行上述方法实施例中检查设备所执行的方法。
在本申请的另一个实施例中，还提供一种计算机程序产品，该计算机程序产品包括计算机执行指令，该计算机执行指令存储在计算机可读存储介质中。当设备的处理器执行该计算机执行指令时，设备执行上述方法实施例中检查设备所执行的方法。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的***，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的***，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介 质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者接入网设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，read-only memory)、随机存取存储器(RAM，random access memory)、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (15)

  1. 一种小区切换方法，其特征在于，包括：
    当终端设备满足小区切换条件时，第一接入网设备确定第二接入网设备，所述第二接入网设备为在预设范围内切换优先级最高的接入网设备，所述终端设备与所述第一接入网设备连接，且所述终端设备存在用户面完整性保护UPIP功能的承载；
    所述第一接入网设备判断所述第二接入网设备是否支持所述UPIP功能；
    当所述第二接入网设备不支持所述UPIP功能时，所述第一接入网设备确定第三接入网设备，所述第三接入网设备的切换优先级低于所述第二接入网设备；
    所述第一接入网设备判断所述第三接入网设备是否支持所述UPIP功能；
    当所述第三接入网设备支持所述UPIP功能时，所述第一接入网设备将所述终端设备切换至所述第三接入网设备。
  2. 根据权利要求1所述的方法，其特征在于，所述第一接入网设备判断所述第二接入网设备是否支持所述UPIP功能包括：
    所述第一接入网设备从本地数据获取所述第二接入网设备的协议版本；
    所述第一接入网设备判断所述第二接入网设备的协议版本是否支持所述UPIP功能；
    当所述第二接入网设备的协议版本支持所述UPIP功能时，所述第一接入网设备确定所述第二接入网设备支持所述UPIP功能；
    当所述第二接入网设备的协议版本不支持所述UPIP功能时，所述第一接入网设备确定所述第二接入网设备不支持所述UPIP功能。
  3. 根据权利要求2所述的方法，其特征在于，在所述第一接入网设备将所述终端设备切换至所述第三接入网设备之前，所述方法还包括：
    所述第一接入网设备向所述第三接入网设备发送切换请求，所述切换请求包括所述UPIP功能的承载的上下文信息；
    所述第一接入网设备接收来自所述第三接入网设备的切换响应，所述切换响应为所述第三接入网设备根据所述上下文信息确定的；
    当所述切换响应为同意切换时，触发所述第一接入网设备将所述终端设备切换至所述第三接入网设备的步骤。
  4. 根据权利要求1所述的方法，其特征在于，所述第一接入网设备判断所述第二接入网设备是否支持所述UPIP功能包括：
    所述第一接入网设备向核心网设备发送第一切换请求，指示所述终端设备切换到所述第二接入网设备；
    所述第一接入网设备接收来自所述核心网设备的第一切换命令；
    所述第一接入网设备判断所述第一切换命令是否包括安全结果信元；
    当所述第一切换命令不包括所述安全结果信元时，所述第一接入网设备确定所述第二接入网设备不支持所述UPIP功能；
    当所述第一切换命令包括所述安全结果信元时，所述第一接入网设备确定所述第二接入网设备支持所述UPIP功能。
  5. 根据权利要求4所述的方法，其特征在于，在所述第一接入网设备判断所述第三接入网设备是否支持所述UPIP功能之后，所述方法还包括：
    当所述第三接入网设备不支持所述UPIP功能时，所述第一接入网设备确定第四接入网设备，所述第四接入网设备的切换优先级低于所述第三接入网设备；
    所述第一接入网设备向所述核心网设备发送第二切换请求，指示所述终端设备切换到所述第四接入网设备；
    所述第一接入网设备接收来自所述核心网设备的第二切换命令；
    所述第一接入网设备判断所述第二切换命令是否包括安全结果信元；
    当所述第二切换命令包括所述安全结果信元时，所述第一接入网设备确定所述第四接入网设备支持 所述UPIP功能；
    所述第一接入网设备将所述终端设备切换至所述第四接入网设备。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    当所述第二切换命令不包括所述安全结果信元时，所述第一接入网设备确定所述第四接入网设备不支持所述UPIP功能；
    所述第一接入网设备按照所述切换优先级降序选取新的接入网设备向所述核心网设备请求切换。
  7. 一种小区切换装置，其特征在于，包括：
    处理单元，用于当终端设备满足小区切换条件时，确定第二接入网设备，所述第二接入网设备为在预设范围内切换优先级最高的接入网设备，所述终端设备与所述装置连接，且所述终端设备存在用户面完整性保护UPIP功能的承载，判断所述第二接入网设备是否支持所述UPIP功能，当所述第二接入网设备不支持所述UPIP功能时，确定第三接入网设备，所述第三接入网设备的切换优先级低于所述第二接入网设备，判断所述第三接入网设备是否支持所述UPIP功能，当所述第三接入网设备支持所述UPIP功能时，将所述终端设备切换至所述第三接入网设备。
  8. 根据权利要求7所述的装置，其特征在于，所述处理单元具体用于：
    从本地数据获取所述第二接入网设备的协议版本；
    判断所述第二接入网设备的协议版本是否支持所述UPIP功能；
    当所述第二接入网设备的协议版本支持所述UPIP功能时，确定所述第二接入网设备支持所述UPIP功能；
    当所述第二接入网设备的协议版本不支持所述UPIP功能时，确定所述第二接入网设备不支持所述UPIP功能。
  9. 根据权利要求8所述的装置，其特征在于，所述装置还包括收发单元，所述收发单元具体用于：
    向所述第三接入网设备发送切换请求，所述切换请求包括所述UPIP功能的承载的上下文信息；
    接收来自所述第三接入网设备的切换响应，所述切换响应为所述第三接入网设备根据所述上下文信息确定的；
    当所述切换响应为同意切换时，将所述终端设备切换至所述第三接入网设备。
  10. 根据权利要求7所述的装置，其特征在于，所述装置还包括收发单元，所述收发单元具体用于：
    向核心网设备发送第一切换请求，指示所述终端设备切换到所述第二接入网设备；
    接收来自所述核心网设备的第一切换命令；
    所述处理单元具体用于：
    判断所述第一切换命令是否包括安全结果信元；
    当所述第一切换命令不包括所述安全结果信元时，确定所述第二接入网设备不支持所述UPIP功能；
    当所述第一切换命令包括所述安全结果信元时，确定所述第二接入网设备支持所述UPIP功能。
  11. 根据权利要求10所述的装置，其特征在于，所述处理单元还用于：
    当所述第三接入网设备不支持所述UPIP功能时，确定第四接入网设备，所述第四接入网设备的切换优先级低于所述第三接入网设备；
    所述收发单元还用于：
    向所述核心网设备发送第二切换请求，指示所述终端设备切换到所述第四接入网设备；
    接收来自所述核心网设备的第二切换命令；
    所述处理单元还用于：
    判断所述第二切换命令是否包括安全结果信元；
    当所述第二切换命令包括所述安全结果信元时，确定所述第四接入网设备支持所述UPIP功能；
    将所述终端设备切换至所述第四接入网设备。
  12. 根据权利要求11所述的装置，其特征在于，所述处理单元还用于：
    当所述第二切换命令不包括所述安全结果信元时，确定所述第四接入网设备不支持所述UPIP功能；
    按照所述切换优先级降序选取新的接入网设备向所述核心网设备请求切换。
  13. 一种计算机设备，其特征在于，包括：处理器以及存储器，
    所述处理器用于执行所述存储器中存储的指令，使得所述计算机设备执行权利要求1至6中任一项所述的方法。
  14. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序，当所述计算机程序在所述计算机上运行时，使得所述计算机执行如权利要求1至6中任一项所述的方法。
  15. 一种计算机程序产品，其特征在于，当所述计算机程序产品在计算机上执行时，所述计算机执行如权利要求1至6中任一项所述的方法。
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