WO2022089254A1 - 一种小区切换方法及通信装置 - Google Patents

一种小区切换方法及通信装置 Download PDF

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Publication number
WO2022089254A1
WO2022089254A1 PCT/CN2021/124697 CN2021124697W WO2022089254A1 WO 2022089254 A1 WO2022089254 A1 WO 2022089254A1 CN 2021124697 W CN2021124697 W CN 2021124697W WO 2022089254 A1 WO2022089254 A1 WO 2022089254A1
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WO
WIPO (PCT)
Prior art keywords
cell
module
cell handover
line
terminal device
Prior art date
Application number
PCT/CN2021/124697
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English (en)
French (fr)
Inventor
曾勇波
秦城
郭涛
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21884982.6A priority Critical patent/EP4224941A4/en
Publication of WO2022089254A1 publication Critical patent/WO2022089254A1/zh
Priority to US18/309,318 priority patent/US20230262547A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data

Definitions

  • the present application relates to the technical field of cell handover, and in particular, to a cell handover method and a communication device.
  • the terminal equipment may move from the coverage of one cell to the coverage of another cell.
  • the terminal equipment needs to perform cell reselection (reselection) or cell handover (handover). Both cell handover and cell reselection require terminal equipment to perform cell measurements.
  • the terminal device moves fast, the terminal device needs to frequently interact with the network device to obtain the measurement configuration and neighbor list.
  • the terminal device may need to measure all the neighbor cells in the neighbor list, even before the terminal device has time to measure. In some adjacent cells, the terminal equipment has moved out of the coverage area of some adjacent cells, resulting in cell handover failure.
  • the present application provides a cell handover method and a communication device, which are used to improve the cell handover success rate and reduce the cell handover delay.
  • a cell handover method is provided.
  • the method can be executed by a communication device, and the communication device can be a terminal device or a communication device capable of supporting functions required by the terminal device to implement the method, such as a chip system.
  • the communication device being a terminal device as an example.
  • the method includes:
  • the first module of the terminal device sends a first request message to the second module of the terminal device, obtains the first information passed from the second module, and assists the cell handover according to the first cell handover list, wherein the first request message is used for
  • the first cell handover list corresponding to a first tracking area code (tracking area code, TAC) is requested, where the first TAC is the TAC of the current cell of the terminal device, and the first information is used to indicate the first cell handover list.
  • TAC tracking area code
  • the terminal device can determine the corresponding first cell handover list according to the first TAC of the current cell of the terminal device to assist the cell handover.
  • the terminal equipment travels on the fixed path, it is not necessary to read all the cell handover lists corresponding to the entire fixed path into the first module, such as the modem, so as to save the memory of the modem.
  • the first module such as the modem
  • the first request message includes a first TAC
  • the first TAC corresponds to the first line
  • the first cell handover list is a cell handover list corresponding to the first line.
  • the cell handover list corresponding to multiple lines can be predetermined. It should be understood that each line has a corresponding TAC, and the second module of the terminal device can determine the first line corresponding to the first TAC, thereby determining the first line corresponding to the first TAC.
  • the first cell handover list corresponding to the line In this way, the network device does not need to frequently acquire and inform the terminal device of the cell list used for cell handover, and the first cell handover list stored by the terminal device occupies less content, thereby saving the memory of the modem.
  • the first request message further includes a first cell identifier
  • the first line is a line corresponding to the first TAC and the first cell identifier.
  • the corresponding line is determined according to the first TAC and the first cell identifier, so as to determine the cell handover list corresponding to the line. It should be understood that, since the same TAC may correspond to one or more cells, then the same TAC may correspond to one or more lines, and the terminal device may determine fewer lines according to the first TAC and the first cell identifier, so as to determine the number of lines that include fewer lines. The first cell switching list of the cell, thereby saving the memory of the modem.
  • the method before the first module of the terminal device sends the first request message to the second module of the terminal device, the method further includes:
  • the first module receives the TAC list from the second module, and the TAC list contains the correspondence between the TAC and the line;
  • the first module determines the first line corresponding to the first TAC based on the TAC list
  • the first module of the terminal device sending the first request message to the second module of the terminal device includes: the first module sending the first request message carrying the first line to the second module.
  • the second module may send a TAC list for indicating the correspondence between the TAC and the line to the first module. It should be understood that the same TAC may correspond to one or more lines, and each line has a corresponding cell switching list.
  • the first module may determine the first line based on the TAC list and the first TAC, so as to request a cell handover list corresponding to the first line from the second module.
  • the method further includes:
  • the first module judges whether the first line includes a line corresponding to the first cell identifier, and re-sends the first request message to the second module if the line corresponding to the first cell identifier is not included. And the second module can delete the first cell handover list. It should be understood that if the first line does not include the line corresponding to the first cell identifier, that is, the first cell handover list determined according to the first TAC does not include the current cell of the terminal device, then it may be considered that the first cell handover list is not optimal. , the second module deletes the first cell handover list to save the storage space of the second module. In addition, the first module may re-request a cell handover list for assisting cell handover from the second module to obtain a better cell handover list.
  • the first cell handover list includes: cell identifiers of cells on the first line, and frequency point information used by each cell.
  • the first module assists cell handover according to the first cell handover list, including:
  • the first module determines a frequency point after the current frequency point based on the first cell handover list, measures the cell corresponding to the frequency point after the current frequency point, and reports the measurement result to the network device.
  • the first module can determine the frequency points that the terminal device may pass through in advance, so as to measure these frequency points, without requiring notification from the network device, that is, reducing the interaction with the network device.
  • the first information further includes: a second cell handover list corresponding to the second line, the second line is different from the first line, and the second line is a line in the traveling direction of the first line .
  • the first information may include a cell handover list corresponding to multiple lines, so that after the first module assists the cell handover according to the first cell handover list corresponding to the current line, it can follow the second cell handover list corresponding to the line closest to the current line.
  • the cell handover list is used to assist the cell handover, thereby avoiding the cell handover delay caused by the terminal equipment frequently acquiring a new cell handover list due to the fact that the first cell handover list includes fewer cells.
  • the method before the first module acquires the first information from the second module, the method further includes:
  • the second module determines the amount of data contained in the first cell handover list; the second module transmits the first cell handover list to the first module when the data amount is greater than or equal to the data amount threshold; the second module transmits the first cell handover list to the first module when the data amount is less than or equal to the data amount threshold When the data volume threshold is reached, the first cell handover list and the second cell handover list are delivered to the first module.
  • the first cell handover list includes fewer cells or fewer corresponding base stations.
  • the second module may send the first cell handover list and the second cell handover list to the first module.
  • the first cell handover list includes a large amount of data, the probability of the terminal device acquiring a new cell handover list is low.
  • the second module can send the first cell handover list to the first module to try to The storage space of the first module is saved.
  • the method further includes: the first module assists the cell handover according to the second cell handover list.
  • the first module assists the cell handover according to the second cell handover list.
  • the route corresponding to the handover category of the first cell is traveled first, and then the route corresponding to the handover list of the second cell is traveled.
  • the first module does not need to re-request the cell handover list, and can directly assist the cell handover according to the second cell handover list to minimize the cell handover delay.
  • the first module of the terminal device sends a first request message to the second module of the terminal device, including:
  • the first module sends a first request message to the second module when it is determined that the terminal device is in the preset module or the movement speed of the terminal device is greater than the preset threshold. It should be understood that the terminal device moves quickly, and the network device needs to obtain the cell handover list frequently. Therefore, in this solution, the first module is triggered to send the first request message to the second module only when the terminal device moves fast, for example, the terminal device is in the high-speed rail mode.
  • the first module is a modem
  • the second module is an application processor
  • the method can be executed by a communication device, and the communication device can be a terminal device or a communication device capable of supporting the functions required by the terminal device to implement the method, such as a chip system.
  • the communication device being a terminal device as an example.
  • the method includes:
  • the first module of the terminal device sends a first request message carrying the first cell identifier to the second module of the terminal device, where the first request message is used to request a first cell handover list corresponding to the first cell identifier, and the first cell identifier is the identity of the current cell of the terminal equipment;
  • the first module acquires first information from the second module, where the first information is used to indicate the first cell handover list;
  • the first module assists cell handover according to the first cell handover list.
  • the first cell identifier corresponds to the first line
  • the first cell handover list is a cell handover list corresponding to the first line.
  • the first cell handover list includes: cell identifiers on the first line and frequency point information used by each cell.
  • the first module assists cell handover according to the first cell handover list, including:
  • the first module determines a frequency point after the current frequency point based on the first cell handover list
  • the first module measures the cell corresponding to the frequency point after the current frequency point, and reports the measurement result to the network device.
  • the first information further includes: a second cell handover list corresponding to the second line, the second line is different from the first line, and the second line is a line in the traveling direction of the first line .
  • the method before the first module acquires the first information from the second module, the method further includes:
  • the second module determines the amount of data contained in the first cell handover list
  • the second module transmits the first cell handover list to the first module when the data volume is greater than or equal to the data volume threshold;
  • the second module transmits the first cell handover list and the second cell handover list to the first module when the data amount is less than the data amount threshold.
  • the method further includes:
  • the first module assists cell handover according to the second cell handover list.
  • the first module of the terminal device sends a first request message to the second module of the terminal device, including:
  • the first module sends the first request message to the second module when it is determined that the terminal device is in a preset mode or the movement speed of the terminal device is greater than a preset threshold.
  • the first module is a modem
  • the second module is an application processor
  • the difference between the second aspect and the first aspect is that the first module requests to acquire a cell handover list corresponding to the first cell identifier, which is similar to the first aspect.
  • the first module requests to acquire a cell handover list corresponding to the first cell identifier, which is similar to the first aspect.
  • embodiments of the present application further provide an electronic device, the electronic device comprising: a display screen, one or more processors; a modem; a memory; one or more programs; wherein the one or more programs are stored In the memory, the one or more programs include instructions that, when executed by the electronic device, cause the electronic device to perform the method steps of any one of the first aspects.
  • an embodiment of the present application further provides an electronic device, and the electronic device may include modules/units for implementing the first aspect or any possible design method of the first aspect; these modules/units may be configured by It can be realized by hardware, and can also be realized by executing corresponding software by hardware.
  • an embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium includes program instructions, and when the program instructions are executed on an electronic device, the electronic device is made to execute the first The method of any one of the aspects.
  • an embodiment of the present application further provides a program product, which, when the program product runs on an electronic device, causes the electronic device to execute the method according to any one of the first aspects.
  • FIG. 1 is a schematic diagram of network deployment on a certain fixed path according to an embodiment of the present application
  • FIG. 2 is a schematic flowchart of a second cell handover method provided by an embodiment of the present application.
  • Fig. 3 is the schematic diagram of TAC and cell and line correspondence
  • FIG. 4 is a schematic flowchart of a third cell handover method provided by an embodiment of the present application.
  • Fig. 5 is the schematic diagram that the fixed path is divided into a plurality of lines and a plurality of lines are sorted;
  • FIG. 6 is a schematic flowchart of a fourth cell handover method provided by an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a fifth cell handover method provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • Network equipment including, for example, access network (AN) equipment, such as a base station (eg, an access point), which may refer to a device in the access network that communicates with wireless terminal equipment through one or more cells over the air interface , or, for example, a network device in a vehicle-to-everything (V2X) technology is a road side unit (RSU).
  • the base station can be used to convert received air frames and IP packets to each other, transmit data packets from terminals to core network equipment, or transmit data packets from core network equipment to specific terminals; the access network may include support for IP Other network-side devices for network functions.
  • the base station includes one or more baseband processing units and one or more radio frequency units, and carries one or more cells.
  • the RSU can be a fixed infrastructure entity supporting V2X applications and can exchange messages with other entities supporting V2X applications.
  • the network device can also coordinate the attribute management of the air interface.
  • the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (long term evolution, LTE) system or long term evolution-advanced (LTE-A), Alternatively, it may also include the next generation node B (gNB) in the fifth generation mobile communication technology (the 5th generation, 5G) new radio (new radio, NR) system (also referred to as the NR system for short) or the next generation node B (gNB) It includes a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, Cloud RAN) system, which is not limited in this embodiment of the present application.
  • 5G new radio
  • NR new radio
  • gNB next generation
  • Terminal devices including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity sexual equipment.
  • the terminal equipment can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, V2X terminal equipment, machine-to-machine/machine-type communication ( machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscription unit (subscriber unit), subscription station (subscriber station), mobile station (mobile station) , remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or user equipment (user device), etc.
  • UE user equipment
  • D2D device-to-device
  • V2X terminal equipment machine-to-machine/machine-type communication
  • M2M/MTC machine-to-machine/machine-type communications
  • M2M/MTC Internet of things
  • IoT Internet of things
  • subscription unit subscriber unit
  • subscription station subscriber station
  • mobile station
  • these may include mobile telephones (or "cellular" telephones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, computer-embedded mobile devices, and the like.
  • mobile telephones or "cellular" telephones
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • constrained devices such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc.
  • it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners.
  • RFID radio frequency identification
  • GPS global positioning system
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the various terminal devices described above if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as on-board terminal equipment.
  • the on-board terminal equipment is also called on-board unit (OBU). ).
  • the terminal device may further include a relay (relay).
  • a relay relay
  • any device capable of data communication with the base station can be regarded as a terminal device.
  • the apparatus for implementing the function of the terminal may be a terminal device, or may be an apparatus capable of supporting the terminal to implement the function, such as a chip system, and the apparatus may be installed in the terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the terminal equipment may move from the coverage of one cell to the coverage of another cell.
  • Each cell can be identified by a unique number, which is called a cell identity (Cell Identity, Cell ID).
  • Cell ID is described by taking the Cell Global Identity (Cell Global Identity, CGI) defined by the standard as an example.
  • CGI Cell Global Identity
  • the terminal equipment needs to perform cell reselection (reselection) or cell handover (handover). Both cell handover and cell reselection require terminal equipment to perform cell measurements.
  • the network device sends measurement configuration information (measConfig) to the terminal device, where the measurement configuration information may include information such as a measurement object (measurement object, MO), a measurement quantity configuration (quantity configuration), and a measurement interval configuration.
  • the measurement parameters of the measurement object may include the configuration of measurement resources on the frequency corresponding to the measurement object, such as one or more cells on the frequency, that is, the measurement parameters of the measurement object sent by the network device to the terminal device may include a cell list.
  • 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 result to the network device.
  • the terminal device can receive reference signals from multiple cells, and measure and calculate the received power (Reference Signal Received Signal, RSRP), reference signal received quality (Reference Signal Received Quality, RSRQ), and received signal strength of the reference signals of multiple cells. Indication (Received Signal Strength Indicator, RSSI), Signal to Interference Noise Ratio (Signal to Interference Noise Ratio, SINR).
  • RSSI Received Signal Strength Indicator
  • SINR Signal to Interference Noise Ratio
  • the network device may configure the terminal device to measure the neighbor cell, for example, the network device may send the neighbor cell measurement list to the terminal device.
  • the terminal device can measure the adjacent cells in the list to obtain measurement results, such as the signal quality of each adjacent cell. Afterwards, the terminal feeds back the measurement result of the neighboring cell and the measurement result of the cell currently serving the terminal device (also referred to as the serving cell) to the network device.
  • the network device can determine to switch the terminal device to a cell with better signal quality according to the measurement result of the serving cell and the measurement result of the neighboring cell.
  • the cell reselection is mainly implemented by the terminal equipment. After satisfying certain trigger conditions and access criteria, the terminal equipment completes the cell reselection.
  • Cell handover requires the network device to use a series of radio resource management (RRM) measurement configurations and the network device to determine the target cell according to feedback from the terminal device. If the RRM measurement result satisfies a certain condition, the network device may send a handover command to the terminal device to instruct the terminal device to switch from one cell to another cell.
  • RRM radio resource management
  • the terminal equipment moves fast, the terminal equipment During the moving process, cell reselection or cell handover is frequently performed.
  • the terminal device in the RRC connection state needs to frequently interact with the network to obtain the neighbor cell measurement configuration information from the network device, and perform the measurement according to the instructions of the base station, and the terminal device may need to switch the frequency point.
  • the terminal device is on a fast-moving vehicle such as a high-speed rail and a subway, and the terminal device moves with the movement of the vehicle. Since the terminal equipment moves faster, the terminal equipment also switches from one cell to another cell more quickly.
  • the network device cannot know exactly the moving direction of the terminal, and will take all the cells associated with the current serving cell as neighboring cells, and instruct the terminal device to perform measurement through the measurement configuration information.
  • the number of adjacent cells may be large; on the other hand, for terminal equipment with a fixed moving direction, some adjacent cells do not actually need to be measured.
  • the service cell may be the cell in the high-speed rail communication private network and the non-high-speed rail communication network. Both are configured as neighbor cells, but in fact, if terminal equipment moving with the high-speed rail connects to a cell that is not a high-speed rail communication network, it may cause communication performance degradation, such as frequent handover failures. Therefore, a large number or unnecessary neighbor cell measurement configurations may lead to results such as long measurement time and untimely reporting, which in turn lead to handover failure.
  • a cell with better signal quality during the measurement process does not mean that the communication quality will also be better after the terminal device is handed over.
  • the handover interval is reduced and the number of handovers increases, which increases the probability of handover failure.
  • a vehicle travels along a given route, for example, the running route of a high-speed rail or subway is fixed, and the network deployment and parameter configuration along the route are relatively stable, the cells and subsequent The target areas are relatively clear.
  • the fixed route or the same route that the user often travels through the terminal device when moving with the high-speed rail, subway and other means of transportation that the user takes is hereinafter referred to as a fixed route.
  • the parameter configuration of the communication network deployed along roads such as subway lines, high-speed railway lines, and highways is usually relatively stable, and the base stations or cells experienced by terminal equipment when passing through a fixed path are also relatively stable.
  • the embodiment of the present application provides a cell handover method.
  • the terminal equipment can assist the terminal equipment to perform cell handover according to the cell list corresponding to the fixed path.
  • the terminal device may store a list of cells corresponding to each fixed path in advance, and when the terminal device moves on a certain fixed path, the terminal device may perform cell handover according to the list of cells corresponding to the fixed path. Because the terminal device obtains the list of cells that the fixed path may pass through in advance, the terminal device can avoid unnecessary measurements and blind handover to cells with poor communication quality, which can reduce the probability of cell handover failure and RRC re-establishment.
  • the terminal device measures the cells in the cell list corresponding to the fixed path, and feeds back the measurement results to the network device, so that the network device can select the cell to which the terminal device is to be handed over.
  • the cell list corresponding to a certain fixed path stored by the terminal equipment includes all the cells that can be obtained on the fixed path.
  • the terminal equipment should switch to the cells that the terminal equipment has not passed during the moving process. Since the cell list corresponding to the fixed path is arranged in the order of cell distribution, the handover records of the terminal equipment on the fixed path, such as the handed over cells, can be used to determine the moving direction of the terminal equipment.
  • the terminal device can determine, according to the moving direction of the terminal device, some cells in the cell list corresponding to the measurement fixed path that match the moving direction of the terminal device, instead of measuring all the cells, to avoid measuring unnecessary cells, such as It is not necessary to measure cells in the opposite direction to the moving direction, so that the terminal device can save measurement time and energy consumption of the terminal device.
  • the cell handover method provided by the embodiments of the present application is described below with reference to the accompanying drawings. Since some or all of the cells in the cell list corresponding to the fixed path are used for handover of the terminal device, the cell list may also be referred to as a cell handover list.
  • the cell list corresponding to the fixed path is hereinafter referred to as a preset cell handover list (or, may also be referred to as a preset path for short).
  • the preset cell handover list includes a plurality of cell information arranged in sequence, and each cell information includes at least one of the following information: cell identifier, frequency point information, TAC (Tracking Area Code, tracking area code), PLMN (Public Land Mobile Network, public land mobile network) information, PCI (Physical Cell Identity, physical cell identity), etc.
  • the cells in the preset cell handover list can be grouped according to certain rules, each group includes one or more cells, and each group can be called a node, so a divided group can also be called a divided node.
  • the cells in the preset cell handover list are grouped or divided into nodes according to the geographical distribution.
  • FIG. 1 is a schematic diagram of an exemplary network deployment on a fixed path provided by an embodiment of the present application. It should be understood that, in some geographic intervals, the operator deploys a large number of cells to obtain better coverage performance; in some geographic intervals, due to the influence of deployment conditions or environments, the number of deployed cells is relatively small.
  • the cellular communication network on the fixed path illustrated in FIG. 1 includes three nodes, which correspond to their respective network devices. The three network devices are network device 1 , network device 2 and network device 3 . It should be understood that a node in this application may also include all cells carried by one or more network devices, and multiple cells carried by one network device may be divided into different nodes.
  • the network device 1 of node 1 carries three cells (ce11), and the cell identifiers of these three cells are respectively recorded as cell1, cell2 and cell3; the network device 2 of node 2 carries one ce11, and the cell identifier is marked as cell1, cell2 and cell3. is cell4; the network device 3 of node 3 bears two ce11s, and the cell identifiers are marked as cell5 and cell6.
  • the frequency point corresponding to cell1 is f1
  • the frequency point corresponding to cell2 is f2
  • the frequency point corresponding to cell3 is f3
  • the frequency point corresponding to cell4 is f2
  • the frequency point corresponding to cell5 is f2
  • the frequency point corresponding to cell6 is f1.
  • the preset cell handover list corresponding to the fixed path is fixed or relatively stable.
  • the preset cell handover list may be determined according to the coverage of the cells, the geographical distribution or the deployment of the network.
  • the preset cell switching list can be expressed as ⁇ (cell1, f1), (cell2, f2), (cell3, f3) ⁇ , ⁇ (cell4, f2) ⁇ , ⁇ (cell5, f2), (cell6, f1) ⁇ .
  • the preset cell handover list is divided into three nodes: node 1 includes three cells, and the attribute information of node 1 includes attribute information of the three cells ⁇ (cell1, f1), (cell2, f2), (cell3, f3) ⁇ ; node 2 includes 1 cell, and the attribute information of node 2 includes the attribute information of the 1 cell ⁇ (cell4, f2) ⁇ ; node 3 includes 2 cells, and the attribute information of node 3 includes the attribute information of the 2 cells Attribute information ⁇ (cell5, f2), (cell6, f1) ⁇ .
  • the attribute information of the cell may also include other information, which is not limited in this application.
  • the terminal device may pre-store a preset cell switching list, and pre-determine the cells that may pass through in the future according to the moving direction of the terminal device. For example, the terminal device is currently in the coverage of cell4, has access to Cell4, and the terminal device has recorded the information of handover from Cell2 to Cell4. , it can be judged that the terminal equipment is moving from the network equipment 2 to the network equipment 3, then when at least one of the RSRP, RSRQ, RSSI, and SINR of Cell4 received by the terminal equipment meets the measurement trigger condition, the terminal equipment can be judged in advance. It may pass through cell5 and cell6, and can preferentially measure cell5 and cell6 according to the pre-stored preset cell handover list, and send the obtained measurement result to the network device. Since the terminal equipment judges and measures the possible cells in advance, the probability of cell handover failure and RRC re-establishment can be reduced.
  • the preset cell handover list belongs to the application layer information of the terminal device.
  • a certain application program (Application, abbreviated as APP) of the application layer acquires the preset cell switching list from the memory (eg read-only memory) of the terminal device or from the network server.
  • the APP is located in the Application Processor (AP) module in the terminal device, which needs to transfer the preset cell handover list to the Modem module of the terminal device.
  • the Modem module can store part or all of the The preset cell handover list delivered by the APP.
  • the operation on the APP can be understood as the operation performed by the AP module.
  • the preset cell handover list of the fixed path can be divided into multiple sections or lines according to the interval of the fixed path.
  • the preset cell switching list on the high-speed railway Beijing-Shanghai line and the high-speed railway Beijing-Guangzhou line can be divided into at least two or two sections according to the high-speed railway line, and one section includes the preset cell switching list on the Beijing-Shanghai line.
  • a section includes the preset cell handover list on the Beijing-Guangzhou line; further, the preset cell handover list on the Beijing-Shanghai line can also be divided into smaller segments according to the network deployment, etc.
  • the preset cell handover list of these small segments In this application it is referred to as a line.
  • other names may also be used to represent the preset cell handover list of the small segment, which is not limited in this application.
  • Figure 1 takes a fixed path network deployment as an example.
  • the terminal device may move on multiple fixed paths.
  • the terminal equipment can move with the high-speed rail, then the terminal equipment can move on the railway lines of the country.
  • Terminal equipment can move on railway lines across the country, or on a road or a subway line in a city.
  • the terminal equipment may pre-store the corresponding preset cell handover lists on multiple fixed paths.
  • the terminal device can also obtain the preset cell handover list on the corresponding path from the network side device (eg, network server, base station, etc.) in real time according to the actual location or the accessed cell.
  • the network side device eg, network server, base station, etc.
  • the embodiment of the present application can also adjust the preset cell handover list stored in the modem module in the terminal device according to the cell currently passed by the terminal device. , so that it is not necessary to store all the preset cell switching lists, so as to save the storage space of the modem module as much as possible.
  • the second cell handover method provided by the embodiments of the present application is described below with reference to the accompanying drawings.
  • FIG. 2 is a schematic flowchart of a second cell handover method provided by an embodiment of the present application.
  • the TAC corresponding to the current serving cell (if it is in the idle state, the camping cell) of the terminal equipment can be selected and A list of cell handovers associated with this TAC.
  • the terminal device can perform cell handover according to the cell handover list. The flow of this method is described below.
  • the application processor of the terminal device sends first information to a common search network module (common search service, CSS) in the modem, where the first information is used to indicate a TAC list, where the TAC list includes the correspondence between TACs and lines.
  • a common search network module common search service, CSS
  • the preset cell handover list divides the cells in the list into multiple nodes according to the deployment or coverage characteristics of the network.
  • a node may include one or more cells, each with its own TAC.
  • network operators or network regulators will assign one or more TAC addresses to a city, or multiple cities may share the same TAC address to facilitate network maintenance or management.
  • a TAC address may include multiple cells. That is, multiple cells may belong to different TACs, or the same TAC.
  • the TAC information of a certain cell can be obtained from messages sent by the cell, for example, from broadcast messages.
  • the terminal device After acquiring the TAC information of the corresponding cell, the terminal device can report the Cell ID (for example, CGI) and TAC information of the corresponding cell to the network-side device, so that the network-side device can maintain the association between the cell identifier and the TAC.
  • the network-side device may generate a preset cell list according to the above-mentioned information reported by the terminal device and the cell handover relationship when the terminal device communicates.
  • the cell handover list associated with the TAC can be selected according to the TAC corresponding to the current terminal's camping cell (or serving cell), so that it is unnecessary to read all cell handover lists corresponding to the entire fixed path into the modem module , so as to save the memory of the modem module, which is suitable for application scenarios with multiple fixed paths.
  • the terminal device may inform the CSS of the TAC information corresponding to the first path.
  • the first path may be divided into multiple lines. It should be understood that each line has a corresponding relationship with a TAC, one line may correspond to one or more TACs, and one TAC may also correspond to one or more lines. Exemplarily, as shown in Table 1, it is a schematic representation of the correspondence between lines and TACs.
  • one correspondence table may also include only the correspondence between the line and the TAC of one line (line), and the correspondence between each line and the TAC may be divided into different correspondence tables.
  • Table 1 only the line whose LineID is 1 and its corresponding TAC information may be included.
  • Table 2 the correspondence between line 1 and TAC is shown in Table 2:
  • Different TACs may correspond to the same cell, or may correspond to different cells, and one TAC may include one or more nodes. Then the corresponding relationship between each line and TAC, node and cell is shown in Table 4.
  • Line number TAC Node ID Cell ID (Cell ID) n TAC1 x c1 n TAC1 x c2 n TAC2 y c3 ... ... ... ... ...
  • n the line number
  • the node numbered x includes two cells
  • the node numbered y includes one cell.
  • the APP of the terminal device may send first information to the CSS, where the first information may be used to indicate the TAC list corresponding to the first path.
  • the CSS can know the TAC of which line the terminal device corresponds to during the moving process, so as to combine the TAC of the current serving cell (the camped cell in the idle state) to determine the TAC associated with the first path from the cell handover list associated with the first path.
  • the associated cell handover list so that the cells in the moving direction can be preferentially measured to assist the cell handover.
  • the first information may be carried in an (attention command, AT) command, or may be carried in other possible commands, which are not limited in this embodiment of the present application.
  • the embodiment of the present application does not limit the specific implementation form of the first information.
  • the first information may carry the corresponding relationship as shown in Table 1.
  • the CSS can obtain the correspondence between the multiple lines and the TAC in the first information, and store the correspondence.
  • Table 1 is predefined, and the first information may carry an identifier (index) of Table 1.
  • the CSS can determine the correspondence between the multiple lines and the TAC according to the identifier (index) in Table 1, and store the correspondence.
  • the terminal device detects that its own movement speed is greater than a preset threshold, and the APP of the terminal sends the first information to the CSS.
  • multiple working modes of the terminal device can be set, such as high-speed rail mode and normal mode.
  • the AP of the terminal sends the first information to the CSS.
  • the high-speed rail mode and the normal mode are relative terms. The high-speed rail mode indicates that the terminal device moves faster, and the normal mode indicates that the terminal device moves slowly. For example, if the terminal device moves fast, then the terminal device enters the high-speed rail mode, and the APP of the terminal device can obtain the working mode of the terminal.
  • the terminal device can detect one or more cell identifiers from the network device, so as to determine the one or more cell identifiers. Whether multiple cells have high-speed rail cell identifiers (for example, HighSpeedFlag), as long as one or more cells have high-speed rail cell identifiers, the terminal device may consider that the terminal's working mode is the high-speed rail mode.
  • high-speed rail cell identifiers for example, HighSpeedFlag
  • the embodiments of the present application do not limit the manner in which the terminal device determines whether to work in the high-speed rail mode.
  • the APP of the terminal sends the first information to the CSS when the terminal device detects or searches for one or more cells of the fixed path that it often passes through.
  • the first information may be acquired in real time or in advance by the APP of the terminal device from the network side device, or may be acquired by the terminal device through its own computing capability and stored in the memory.
  • the terminal device can store the first information in the memory immediately after obtaining the first information without other triggering conditions.
  • the RRC of the terminal device sends second information to the CSS, where the second information is used to indicate the TAC information of the cell that the terminal device currently camps on.
  • the RRC submodule in the Modem module of the terminal device can obtain the TAC corresponding to the current serving cell of the terminal device, such as the first TAC, and transmit the first TAC to the APP to request the APP for a cell handover list associated with the first TAC.
  • the Modem module of the terminal device obtains the state information of the terminal device in real time, so as to report the TAC of the current serving cell according to the state information. For example, when the terminal device detects that it is in the high-speed rail mode, each time it accesses a cell, it transmits the TAC information to which the serving cell belongs to the CSS.
  • the sub-module in the Modem module that implements the RRC function of LTE is called the LRRC module; similarly, the sub-module of the Modem module that implements the RRC function of the NR is called the NRRC module.
  • the RRC of the terminal device may send second information to the CSS, where the second information may carry the first TAC.
  • the CSS of the terminal device sends a first request message to the APP, where the first request message is used to request a first cell handover list corresponding to the first TAC.
  • the CSS of the terminal device may look up one or more lines corresponding to the first TAC in one or more of the above-mentioned Tables 1-4. After that, the CSS transmits the identifiers of the one or more lines to the APP for requesting the cell handover list corresponding to the first TAC. For example, the CSS sends a request message, such as a first request message, to the APP for requesting the cell handover list corresponding to the one or more lines.
  • the first request message may carry the serial number or identification of the one or more lines.
  • the first TAC is TAC4.
  • the CSS determines that the lines corresponding to TAC4 include line 1 and line 2 according to Table 1.
  • the CSS may send a first request message carrying the number of line 1 and the number of line 2 to the APP.
  • the CSS transmits the acquired TAC information of the current serving cell to the APP, and the APP acquires the line information according to the correspondence between the line and the TAC, that is, the first request message carries the TAC information.
  • the APP of the terminal device sends third information to the CSS, where the third information is used to indicate the first cell handover list.
  • the APP of the terminal device After the APP of the terminal device receives the first request message, it can determine one or more cell information corresponding to the one or more lines according to the number of one or more lines carried in the first request message and Table 2, that is, determine the first Cell handover list.
  • the APP receives the line number information in the first request message, and obtains the cell identifiers corresponding to line 1 and line 2 from Table 2, For example, the cell identifiers are c1 and c2, then the terminal device may determine that the cell identifiers included in the first cell handover list are c1 and c2.
  • the APP may transmit all the cell handover list information in line 1 and line 2 to the CSS, that is, the first cell handover list determined by the terminal device includes c1, c2 and c3.
  • the terminal device After the terminal device determines the first cell handover list, it can send the first cell handover list to the CSS, for example, the APP of the terminal device sends third information to the CSS, where the third information can carry the first cell handover list that includes information about one or more cells list.
  • the cell information in the first cell handover list in the third information has been arranged according to the handover relationship, distribution, network deployment characteristics, etc., that is, the cell information exists in an order of precedence.
  • the CSS of the terminal device can store the first cell handover list, and does not need to store the cell handover list corresponding to the entire fixed path, so that the storage space of the CSS can be saved.
  • the CSS of the terminal device sends a notification message to the RRC, where the notification message is used to indicate the first cell handover list.
  • the CSS of the terminal device After the CSS of the terminal device stores the first cell handover list, it can notify the RRC of the cell handover list of the line related to the cell currently camped on by the terminal.
  • the CSS in the terminal can dynamically store the cell handover list associated with the TAC corresponding to the currently residing cell, without the need to store the cell handover list corresponding to the entire fixed path, thereby saving the storage of the CSS space.
  • a line corresponding to a TAC contains a large number of cells or nodes, which is limited by the size of the CSS memory, then for multiple lines corresponding to the same TAC address, some of the lines correspond to The cell handover list may not be stored to CSS. Due to the limitation of the CSS memory size, the cell switching list corresponding to some lines in the back cannot be stored in the CSS. In this way, the terminal cannot identify the cells corresponding to some lines in the back row, that is, it cannot assist in handover to a more suitable cell.
  • FIG. 3 is a schematic diagram of the correspondence between TACs, cells, and lines.
  • FIG. 3 takes as an example that the TAC corresponding to the cell currently camped on by the terminal is TAC1.
  • TAC1 covers two lines, which are line 1 and line 2, wherein the cell corresponding to line 1 includes cell1-celln, and the cell corresponding to line 2 includes cellxa-cellxn.
  • the RRC of the terminal sends the TAC (TAC1) corresponding to cellxc to the CSS, and the CSS requests the APP for the cell handover list corresponding to the TAC (TAC1) corresponding to cellxc.
  • the APP determines the cell handover list corresponding to TAC1, that is, cell1-celln and cellxa-cellxn, and sends the cell handover list to the CSS.
  • CSS stores cell1-celln and cellxa-cellxn in order.
  • the CSS may only store the cell handover list above the dotted line in Figure 3. That is, the cell handover list stored by the CSS does not include cellxc, and the cell handover list learned by RRC from the CSS also does not include cellxc, which cannot assist the terminal equipment from being handed over to a more suitable cell, such as Cellxd.
  • the embodiment of the present application proposes a third cell handover method.
  • an appropriate cell handover list can be selected from the cell handover list corresponding to the entire fixed path according to the TAC and the cell identifier, so as to reduce the possibility that the terminal cannot recognize
  • the probability of the line corresponding to the cell in the back row is to ensure that the terminal equipment is switched to a more suitable cell as much as possible.
  • FIG. 4 is a schematic flowchart of a third cell handover method according to an embodiment of the present application. The flow of this method is described below.
  • the APP of the terminal device sends first information to the CSS, where the first information is used to indicate TAC information.
  • the TAC information (list), that is, the correspondence between lines and TACs, may only be stored in the APP instead of being stored in the CSS memory.
  • the RRC of the terminal sends second information to the CSS, where the second information is used to indicate the TAC information and the cell identifier of the current serving cell of the terminal.
  • the difference between S402 and S202 is that the RRC of the terminal device not only notifies the CSS of the TAC information of the current serving cell of the terminal device, but also notifies the CSS of the identifier of the current serving cell of the terminal device.
  • the RRC of the terminal device may send the second information to the CSS, where the second information may carry the TAC information of the current serving cell of the terminal device and the cell identity of the current serving cell.
  • the second information carries the first TAC corresponding to the current serving cell and the first cell identifier.
  • the CSS of the terminal device sends a first request message to the APP, where the first request message is used to request a second cell handover list corresponding to the first TAC and the first cell identifier.
  • the specific implementation of S403 may refer to the specific implementation of the aforementioned S203.
  • the CSS may select one or more lines corresponding to the first TAC and the first cell identifier according to the first TAC, After that, the CSS notifies the APP of the one or more lines and the first cell identification information, which is used to request the second cell handover list corresponding to the first TAC and the first cell identification, which will not be repeated here.
  • the difference between S403 and S203 is that the first request message also carries the first cell identifier.
  • the first request message sent by the CSS of the terminal device to the APP includes the first TAC and the first cell identifier. That is, the CSS of the terminal device may not select one or more lines corresponding to the first TAC and the first cell identity according to the first TAC.
  • the APP of the terminal device determines the second cell handover list according to the first TAC and the first cell identifier.
  • the APP of the terminal may determine the second cell handover list according to the first TAC and the first cell identifier, and send the second cell handover list to the CSS.
  • the line corresponding to the first TAC such as TAC1 includes Line 1 (Line 1) and Line 2 (Line 2)
  • the line corresponding to the first cell identifier Cell3 is Line 1 (Line 1)
  • the APP The second cell list may be determined as a cell handover list included in line 1 according to the first TAC (TAC1) and the first cell identifier (Cell3).
  • the APP of the terminal device sends third information to the CSS, where the third information is used to indicate the second cell handover list.
  • the specific implementation of S405 may refer to the specific implementation of the foregoing S204, the difference is that the third information in S405 may carry one or more cell identifiers in the second cell handover list, such as the identifiers of cell2 and cell3. Since the second handover cell list includes cells corresponding to the first cell ID, that is, the cell handover list stored by the CSS includes the serving cells of the terminal equipment, it can reduce the possibility that the terminal equipment cannot identify the lines corresponding to some lines behind the preset cell handover list. The probability of the cell, try to ensure that the terminal equipment can be handed over to a more suitable cell.
  • the terminal device performs cell switching according to the second cell switching list, and when the terminal device switches all cells included in the second cell switching list, the terminal device also needs to re-acquire a new cell switching list. That is, the APP of the terminal device needs to re-identify the travel path and re-send the first information to the CSS, the RRC of the terminal device re-sends the second information to the CSS, and the CSS re-stores the new cell handover list.
  • the CSS needs to match the corresponding cell handover list according to the cell ID and/or TAC from the cell handover list corresponding to the entire fixed path before re-storing the new cell handover list, this will cause a delay in the cell handover.
  • the terminal device moves fast, the terminal device has traveled a long distance before acquiring the new cell handover list, then the acquired new cell handover list is invalid, that is, the terminal device cannot switch to the cells included in the new cell handover list. .
  • multiple lines corresponding to the first TAC may be prioritized.
  • the priority may be sorted according to the distance between lines, and the line with the closest distance has the highest priority. That is, the line with the closest distance is placed after the line of the current node.
  • the CSS may store the corresponding cell handover list according to the priority of the lines.
  • the terminal device preferentially performs handover according to the cells in the second cell handover list, and then can continue to perform handover according to other cell handover lists stored in the CSS, thereby avoiding that the second cell handover list includes fewer cells and the terminal device frequently obtains new cell handover lists.
  • the resulting cell handover delay is the case where the terminal device preferentially performs handover according to the cells in the second cell handover list, and then can continue to perform handover according to other cell handover lists stored in the CSS, thereby avoiding that the second cell handover list includes fewer cells and the terminal device frequently obtains new cell handover lists. The resulting cell handover delay.
  • FIG. 5 is a schematic diagram of dividing a fixed path into multiple lines and sorting the multiple lines.
  • FIG. 5 includes five lines as an example, and the five lines are line 1, line 2, line 3, line 4, and line 5 respectively.
  • the distance between the geographic location of the head-end node (end node) of any line and the geographic location of the head-end node (end node) of multiple lines can be calculated, and the location of the node with the closest distance can be selected.
  • the priority of the line is the highest, that is, the line where the node with the closest distance is selected is arranged after the line where the current node is located.
  • the path distance between the head-end node (end node) of any line and the head-end nodes (end nodes) of multiple lines can be calculated, that is, the distance between the nodes selected by any two paths can be calculated.
  • the number of jumps on the toggle relationship i.e. how many times the two selected nodes jump.
  • the line where the closest node is located has the highest priority, that is, the line where the closest node is located is selected to be arranged after the line where the current node is located.
  • the terminal device corresponds to line 1 according to the first cell identifier and the cell included in the second cell handover list of the first TAC handover. If line 1 includes fewer cells or nodes, the terminal device needs to re-acquire a new cell handover list, such as the cell handover list corresponding to line 4, and then perform handover according to the cell handover list corresponding to line 4.
  • multiple lines corresponding to the first TAC are sorted in advance, for example, line 1, line 4, and line 5 in sequence.
  • the CSS also stores the cell handover lists corresponding to line 4 and line 5 in sequence.
  • the terminal device performs cell handover according to the second cell handover list, it can continue to perform handover according to the cell handover list corresponding to line 4, and subsequently perform handover according to the cell handover list corresponding to line 5.
  • the terminal device does not need to re-acquire the cell handover lists corresponding to the line 4 and the line 5 respectively, which can save the time delay caused by identifying the line during the cell handover process.
  • the CSS may store multiple cell handover lists according to the priority order of multiple lines.
  • the priority order of the multiple lines is consistent with the moving direction of the terminal device. For example, multiple lines can be selected according to the moving direction of the terminal device. For ease of understanding, the example shown in FIG. 5 is used. In FIG. 5 , due to the splitting of line 1, there are line 2 and line 3, that is, line 2 and line 3 have intersections with line 1. Lines 1 to 5 are sorted according to the moving direction of the terminal equipment. If the cell ID of the currently residing cell is on line 1, according to the moving direction of the terminal equipment, the adjacent lines 2 and 3 are preferentially selected.
  • the priority order of the multiple lines is highly correlated with the moving direction of the terminal device, and multiple lines may be selected in order of the correlation.
  • the correlation here can be measured according to the path distance between multiple lines, and the correlation is relative. For example, a line corresponding to a number that is closer to the current line number in the moving direction of the terminal device is a line that has a greater correlation with the moving direction of the terminal device, that is, the closer the line number is, the greater the correlation.
  • Line 2 and Line 3 intersect with Line 1. Sort line 1 to line 5 according to the moving direction of the terminal equipment.
  • the terminal device can store as many cell handover lists corresponding to the lines as possible to further save the cell handover delay.
  • the CSS of the terminal device sends a notification message to the RRC, where the notification message is used to indicate the second cell handover list.
  • the CSS of the terminal device stores the second cell handover list, and can notify the RRC of the cell handover list of the line related to the current serving cell of the terminal device.
  • an appropriate cell handover list is selected from the cell handover list corresponding to the entire fixed path according to the TAC and the cell identifier, so as to reduce the probability that the terminal device cannot be handed over to the cell corresponding to some lines in the back row, and try to ensure that the terminal device Handover to a more suitable cell.
  • the APP of the terminal device determines the second cell handover list according to the first TAC and the first cell identifier sent by the CSS.
  • the embodiment of the present application provides a fourth cell handover method.
  • the APP of the terminal device may determine the first cell handover list according to the first TAC, and further, the CSS of the terminal device may determine the second cell handover list from the first cell handover list according to the first cell identifier.
  • FIG. 6 is a flowchart of a fourth cell handover method provided by an embodiment of the present application. The flowchart of the method is described as follows.
  • the APP of the terminal device sends first information to the CSS, where the first information is used to indicate the TAC list corresponding to the first path.
  • S601 is the same as the specific implementation of the aforementioned S201, and specific reference is made to the relevant introduction of S201, and details are not repeated here.
  • the RRC of the terminal device sends second information to the CSS, where the second information is used to indicate the TAC information and the cell identifier of the current serving cell of the terminal device.
  • S602 is the same as the specific implementation of the aforementioned S402.
  • S402 will not be repeated here.
  • the CSS of the terminal device sends a first request message to the APP, where the first request message is used to request a second cell handover list corresponding to the first TAC.
  • S603 is the same as the specific implementation of the aforementioned S203, and specific reference is made to the relevant introduction of S203, and details are not repeated here.
  • the APP of the terminal device sends third information to the CSS, where the third information is used to indicate the first cell handover list.
  • S604 is the same as the specific implementation of the aforementioned S204, and specific reference is made to the relevant introduction of S204, and details are not repeated here.
  • the CSS of the terminal device determines the second cell handover list according to the first cell identifier and the first cell handover list.
  • the CSS of the terminal device may determine the second cell handover list from the first cell handover list according to the first cell identity. In some implementations, the CSS of the terminal may only acquire a part of the cell information in the first cell handover list due to memory limitations. If the cell information includes the first cell identifier, proceed to S606; otherwise, delete the acquired cell handover list information, return to S603, and continue to acquire cell information from the APP until the line information including the first cell identifier is acquired.
  • the CSS of the terminal device sends a notification message to the RRC, where the notification message is used to indicate the second cell handover list.
  • S606 is the same as the specific implementation of the aforementioned S406, and specific reference is made to the relevant introduction of S406, and details are not repeated here.
  • the APP of the terminal device determines the first TAC and the first cell identifier according to the first TAC and the first cell identifier.
  • Two-cell handover list in the embodiment shown in FIG. 6 , the APP of the terminal device first determines the first cell handover list according to the first TAC, and then the CSS of the terminal device determines the second cell handover list according to the first cell identifier.
  • the related technical solution in the embodiment of FIG. 6 can be used as the related solution in the embodiment of FIG. 4 .
  • the multiple lines corresponding to the first TAC may be prioritized, etc., which will not be repeated here. .
  • the APP of the terminal device determines the first cell handover list according to the first TAC sent by the CSS.
  • the embodiment of the present application provides a fifth cell handover method.
  • the APP of the terminal device may determine the first cell handover list according to the first cell identifier.
  • FIG. 7 is a flowchart of a fifth cell handover method provided by an embodiment of the present application. The flowchart of the method is described as follows.
  • the APP of the terminal device sends first information to the CSS, where the first information is used to indicate the TAC list corresponding to the first path.
  • S701 is the same as the specific implementation of the aforementioned S201.
  • S201 For details, please refer to the relevant introduction of S201, and details will not be repeated here.
  • the APP of the terminal device may not send the first information to the CSS.
  • the RRC of the terminal device sends second information to the CSS, where the second information is used to indicate the identity of the current serving cell of the terminal device.
  • the CSS of the terminal device sends a first request message to the APP, where the first request message is used to request a first cell handover list corresponding to the first cell identifier, where the first cell identifier is the identifier of the current serving cell of the terminal device.
  • S703 is the same as the specific implementation of the aforementioned S203, and the difference is that the first request message carries the first cell identifier.
  • the relevant introduction of S203 please refer to the relevant introduction of S203, which will not be repeated here.
  • the APP of the terminal device sends third information to the CSS, where the third information is used to indicate the first cell handover list.
  • S704 is the same as the specific implementation of the aforementioned S204, and specific reference is made to the relevant introduction of S204, which will not be repeated here.
  • the CSS of the terminal device sends a notification message to the RRC, where the notification message is used to indicate the first cell handover list.
  • S705 is the same as the specific implementation of the aforementioned S406, and specific reference is made to the relevant introduction of S406, which will not be repeated here.
  • the accessed cell when the terminal device is in the RRC connected state, the accessed cell is called the serving cell; and when the terminal device is in the RRC idle state (RRC_IDLE), the cell where it resides is called a serving cell.
  • a cell is called a camping cell.
  • the serving cell in the embodiment is replaced with the camping cell, so that the method is also applicable to the RRC idle state.
  • the embodiments of the present application may be applied to an electronic device supporting a cell handover function.
  • the electronic device in the embodiment of the present application may also be called a terminal, a terminal device, a user equipment (user equipment, UE), and the like.
  • the electronic device in the embodiment of the present application may be a portable electronic device, such as a mobile phone, a tablet computer, a wearable device (such as a smart watch) with a wireless communication function, etc., a device that can install an APP.
  • portable electronic devices include, but are not limited to, carry-on Or portable electronic devices with other operating systems.
  • FIG. 8 shows a structural diagram of an electronic device to which an embodiment of the present invention may be applied.
  • the electronic device 800 may include a processor 810, an internal memory 821, an external memory interface 822, an antenna 1, a mobile communication module 831, an antenna 2, a wireless communication module 832, an audio module 840, a speaker 840A, Receiver 840B, microphone 840C, headphone jack 840D, display screen 851, subscriber identification module (SIM) card interface 852, camera 853, button 854, sensor module 860, universal serial bus (USB) interface 870 , a charging management module 880 , a power management module 881 and a battery 882 .
  • SIM subscriber identification module
  • USB universal serial bus
  • the sensor module 860 may include a touch sensor 860A and a fingerprint sensor 860B. In other embodiments, the sensor module 860 may further include a gyro sensor, a pressure sensor, an acceleration sensor, a distance sensor, a distance sensor, a proximity light sensor, a temperature sensor, a bone conduction sensor, and the like. In other embodiments, the electronic device 800 may further include buttons 854, indicators 855, motors 856, and the like.
  • the structures illustrated in the embodiments of the present invention do not constitute a specific limitation on the electronic device 800 .
  • the electronic device 800 may include more or less components than shown, or combine some components, or separate some components, or arrange different components.
  • the illustrated components may be implemented in hardware, software, or a combination of software and hardware.
  • the processor 810 may include one or more processing units.
  • the processor 810 may include an application processor (application processor, AP), a modem processor (also referred to as a modem), a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (DSP), baseband processor, and/or neural-network processing unit (NPU), etc.
  • different processing units may be independent devices, or may be integrated in one or more processors.
  • the controller may be the nerve center and command center of the electronic device 800 .
  • the controller 810 can generate an operation control signal according to the instruction operation code and the timing signal, and complete the control of fetching and executing the instruction.
  • the processor 810 may complete the process of merging or separating the control interfaces of at least two smart home devices by executing program instructions, so as to achieve corresponding display effects.
  • memory may also be provided in the processor 810 for storing instructions and data.
  • the memory in the processor 810 may be a cache memory. This memory may be used to hold instructions or data that have just been used or recycled by the processor 810 . If the processor 810 needs to use the instruction or data again, it can be called directly from this memory. This helps to avoid repeated accesses, reduces the waiting time of the processor 810, and thus improves the efficiency of the system.
  • Internal memory 821 may be used to store computer executable program code.
  • the executable program code includes instructions.
  • the processor 810 executes various functional applications and data processing of the electronic device by executing the instructions stored in the internal memory 821 .
  • the internal memory 821 may include a storage program area and a storage data area.
  • the storage program area can store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), and the like.
  • the storage data area can store data created during the use of the electronic device (such as image data of a smart home device, etc.).
  • the internal memory 821 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (UFS), and the like.
  • the internal memory 821 may store instructions or codes for merging or separating the control interfaces of at least two smart home devices.
  • the external memory interface 822 can be used to connect an external memory card (eg, a Micro SD card) to realize the expansion of the storage capacity of the electronic device.
  • the external memory card communicates with the processor 810 through the external memory interface 822 to realize the data storage function. For example, save files such as music, video, etc. in an external memory card.
  • the wireless communication function of the electronic device 800 can be implemented by the antenna 1, the antenna 2, the mobile communication module 831, the wireless communication module 832, the modulation and demodulation processor, the baseband processor, and the like.
  • Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in electronic device 800 may be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization.
  • the antenna 1 can be multiplexed as a diversity antenna of the wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.
  • the mobile communication module 831 can provide wireless communication solutions including 2G/3G/8G/5G etc. applied on the electronic device 800 .
  • the mobile communication module 831 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), and the like.
  • the mobile communication module 831 can receive the electromagnetic wave signal from the antenna 1, filter, amplify, etc. the received electromagnetic wave signal, and transmit it to the modulation and demodulation processor for demodulation.
  • the mobile communication module 831 can also amplify the signal modulated by the modulation and demodulation processor, and then convert it into an electromagnetic wave signal and radiate it out through the antenna 1 .
  • at least part of the functional modules of the mobile communication module 831 may be provided in the processor 810 .
  • At least part of the functional modules of the mobile communication module 831 may be provided in the same device as at least part of the modules of the processor 810 .
  • the mobile communication module 831 can send voice to other electronic devices, and can also receive voices sent by other electronic devices.
  • the modem processor may include a modulator and a demodulator.
  • the modulator is used to modulate the low frequency baseband signal to be sent into a medium and high frequency signal.
  • the demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator transmits the demodulated low-frequency baseband signal to the baseband processor for processing.
  • the low frequency baseband signal is processed by the baseband processor and passed to the application processor.
  • the modulation and demodulation processor includes the RRC module and the CSS module in this document.
  • the application processor outputs a sound signal through an audio device (not limited to the speaker 870A, the receiver 870B, etc.), or displays an image or video through the display screen 851 .
  • the modem processor may be a stand-alone device.
  • the modulation and demodulation processor may be independent of the processor 810, and may be provided in the same device as the mobile communication module 831 or other functional modules.
  • the application processor, the CSS module, and the APP module may execute the methods of the embodiments shown in FIG. 2 , FIG. 4 , FIG. 6 , and FIG. 8 .
  • the wireless communication module 832 can provide wireless local area networks (wireless local area networks, WLAN) (such as Wi-Fi networks), Bluetooth (bluetooth, BT), global navigation satellite system (global navigation satellite system, GNSS) applied on electronic devices. , frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions.
  • the wireless communication module 832 may be one or more devices integrating at least one communication processing module.
  • the wireless communication module 832 receives the electromagnetic wave signal via the antenna 2 , frequency modulates and filters the electromagnetic wave signal, and sends the processed signal to the processor 810 .
  • the wireless communication module 832 can also receive the signal to be sent from the processor 810 , perform frequency modulation and amplification on the signal, and then convert it into an electromagnetic wave signal and radiate it through the antenna 2 .
  • the antenna 1 of the electronic device is coupled with the mobile communication module 831, and the antenna 2 is coupled with the wireless communication module 832, so that the electronic device 800 can communicate with the network and other devices through wireless communication technology.
  • the wireless communication technologies may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), broadband Code Division Multiple Access (WCDMA), Time Division Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), BT, GNSS, WLAN, NFC , FM, and/or IR technology, etc.
  • the GNSS may include a global positioning system (global positioning system, GPS), a global navigation satellite system (GLONASS), a Beidou satellite navigation system (beidou navigation satellite system, BDS), a quasi-zenith satellite system (quasi -zenith satellite system, QZSS) and/or satellite based augmentation systems (SBAS).
  • GPS global positioning system
  • GLONASS global navigation satellite system
  • BDS Beidou satellite navigation system
  • BDS Beidou navigation satellite system
  • QZSS quasi-zenith satellite system
  • SBAS satellite based augmentation systems
  • the electronic device 800 may implement audio functions through an audio module 840, a speaker 840A, a receiver 840B, a microphone 840C, an earphone interface 840D, an application processor, and the like. Such as music playback, recording, etc.
  • the electronic device 800 may implement a display function through a GPU, a display screen 851, an application processor, and the like.
  • the GPU is a microprocessor for image processing, and is connected to the display screen 851 and the application processor.
  • the GPU is used to perform mathematical and geometric calculations for graphics rendering.
  • Processor 810 may include one or more GPUs that execute program instructions to generate or alter display information.
  • the display screen 851 may be used to display images, videos, and the like.
  • the display screen 851 may include a display panel.
  • the display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active matrix organic light emitting diode, or an active matrix organic light emitting diode (active-matrix organic light).
  • LED diode AMOLED
  • flexible light-emitting diode flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diode (quantum dot light emitting diodes, QLED) and so on.
  • the electronic device 800 may include 8 or N display screens 851 , where N is a positive integer greater than one.
  • the control interface of at least two smart home devices that are merged or separated may be displayed through the display screen 851, which will be described in detail later.
  • the electronic device 800 may implement a shooting function through a camera 853, an image processor, a video codec, a display screen 851, an application processor, and the like.
  • Camera 853 can be used to capture still images or video.
  • the camera 853 may include a lens and an image sensor.
  • the camera 853 may include a front camera and a rear camera.
  • the image processor may be a DSP, or may be other devices for image processing.
  • the ISP can also directly perform post-image processing after obtaining the digital image signal, such as algorithm optimization for image noise, brightness, and color.
  • Video codecs are used to compress or decompress digital video.
  • Electronic device 800 may support one or more video codecs. In this way, the electronic device 800 can play or record videos of various encoding formats, such as: Moving Picture Experts Group (moving picture experts group, MPEG) 1, MPEG2, MPEG3, MPEG4 and so on.
  • the keys 854 may include a power-on key, a volume key, and the like. Keys 854 may be mechanical keys. It can also be a touch key.
  • the electronic device 800 may receive key inputs and generate key signal inputs related to user settings and function control of the electronic device.
  • the indicator 855 can be an indicator light, which can be used to indicate the charging state, the change of power, and can also be used to indicate a message, a missed call, a notification, and the like.
  • Motor 856 can generate vibrating alerts.
  • the motor 856 can be used for vibrating alerts for incoming calls, and can also be used for touch vibration feedback.
  • touch operations acting on different applications can correspond to different vibration feedback effects.
  • the motor 856 can also correspond to different vibration feedback effects for touch operations on different areas of the display screen 851 .
  • Different application scenarios for example: time reminder, receiving information, alarm clock, games, etc.
  • the touch vibration feedback effect can also support customization.
  • Touch sensor 860A may also be referred to as a "touch panel.”
  • the touch sensor 860A can be disposed on the display screen 854, and the touch sensor 860A and the display screen 851 form a touch screen, also called a "touch screen”.
  • Touch sensor 860A is used to detect touch operations on or near it.
  • the touch sensor 860A may communicate the detected touch operation to the application processor to determine the type of touch event.
  • Visual output related to touch operations may be provided through display screen 851 .
  • the touch sensor 860A can also be disposed on the surface of the electronic device, which is different from the position where the display screen 851 is located.
  • Fingerprint sensor 860B may be used to capture fingerprints. Electronic devices can use the collected fingerprint characteristics to unlock fingerprints, access application locks, take photos with fingerprints, and answer incoming calls with fingerprints.
  • the processor 810 may also include one or more interfaces.
  • the interface may be the SIM card interface 852 .
  • the interface may also be the USB interface 870 .
  • the processor 810 in this embodiment of the present application may be connected to different modules of the electronic device through an interface, so that the electronic device 800 can implement different functions. For example, taking pictures, processing, etc. It should be noted that, the embodiment of the present application does not limit the connection manner of the interface in the electronic device 800 .
  • the SIM card interface 852 can be used to connect a SIM card.
  • the SIM card can be connected to and separated from the electronic device 800 by inserting into the SIM card interface 852 or pulling out from the SIM card interface 852 .
  • the electronic device 800 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1.
  • the SIM card interface 852 can support Nano SIM card, Micro SIM card, SIM card and so on.
  • the same SIM card interface 852 can insert multiple cards at the same time.
  • the types of the plurality of cards may be the same or different.
  • the SIM card interface 852 can also be compatible with different types of SIM cards.
  • the SIM card interface 852 is also compatible with external memory cards.
  • the electronic device 800 interacts with the network through the SIM card to implement functions such as call and data communication.
  • the electronic device 800 employs an eSIM, ie: an embedded SIM card.
  • the eSIM card can be embedded in the electronic device and cannot be separated from the electronic device 800 .
  • the USB interface 870 is an interface conforming to the USB standard specification.
  • the USB interface 870 may include a Mini USB interface, a Micro USB interface, a USB Type C interface, and the like.
  • the USB interface 870 can be used to connect a charger to charge the electronic device 800, and can also be used to transmit data between the electronic device 800 and peripheral devices. It can also be used to connect headphones to play audio through the headphones.
  • the charging management module 880 is used to receive charging input from the charger.
  • the charger may be a wireless charger or a wired charger.
  • the charging management module 880 may receive charging input from the wired charger through the USB interface 870 .
  • the charging management module 880 may receive wireless charging input through a wireless charging coil of the electronic device. While the charging management module 880 charges the battery 882 , the electronic device 800 can also be powered by the power management module 881 .
  • the power management module 881 is used to connect the battery 882 , the charging management module 880 and the processor 810 .
  • the power management module 881 receives input from the battery 882 and/or the charge management module 880, and supplies power to the processor 810, internal memory 821, external memory, display screen 851, camera 853, mobile communication module 831 and wireless communication module 832.
  • the power management module 884 can also be used to monitor parameters such as battery capacity, battery cycle times, battery health status (leakage, impedance).
  • the power management module 881 may also be provided in the processor 810 .
  • the power management module 881 and the charge management module 880 may also be provided in the same device.
  • the interface connection relationship between the modules illustrated in the embodiments of the present application is only a schematic illustration, and does not constitute a structural limitation of the electronic device 800 .
  • the electronic device 800 may also adopt different interface connection manners in the foregoing embodiments, or a combination of multiple interface connection manners.
  • the hardware structure shown in FIG. 8 is only an example.
  • the electronic device of the embodiments of the present application may have more or less components than those shown in the figures, may combine two or more components, or may have different component configurations.
  • the various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.
  • the aforementioned AP can be the processor 810, and the CSS and RRC modules are sub-modules in the modem that can perform the steps involved in the above method embodiments. All relevant content can be cited in the functional description of the corresponding functional module, which will not be repeated here. .
  • the electronic device provided in this embodiment is used to execute the above cell handover method, so the same effect as the above implementation method can be achieved.
  • An embodiment of the present application further provides a computer storage medium, where computer instructions are stored in the computer storage medium, and when the computer instructions are executed on an electronic device, the electronic device executes the above-mentioned related method steps to implement the cell switching method in the above-mentioned embodiment. .
  • the embodiment of the present application also provides a computer program product, which when the computer program product runs on the computer, causes the computer to execute the above-mentioned relevant steps, so as to realize the cell handover method in the above-mentioned embodiment.
  • the embodiments of the present application also provide an apparatus, which may specifically be a chip, a component or a module, and the apparatus may include a connected processor and a memory; wherein, the memory is used for storing computer execution instructions, and when the apparatus is running, The processor can execute the computer-executed instructions stored in the memory, so that the chip executes the image cell switching method in the above method embodiments.
  • the electronic device, computer storage medium, computer program product or chip provided in this embodiment are all used to execute the corresponding method provided above. Therefore, for the beneficial effects that can be achieved, reference can be made to the corresponding provided above. The beneficial effects in the method will not be repeated here.
  • At least one (a) of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c Can be single or multiple.
  • the ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority or priority of multiple objects. Importance.
  • the first cell handover list and the second cell handover list are only for distinguishing different cell handover lists, and do not indicate the difference in priority or importance of the two kinds of information.
  • the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.
  • the word "exemplary” is used to indicate an example or illustration. Any embodiment or implementation described in this application summary as an “example” should not be construed as preferred over other embodiments or implementations. That is, the use of the word “example” is intended to present concepts in a concrete manner.
  • the disclosed apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of modules or units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or May be integrated into another device, or some features may be omitted, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • Units described as separate components may or may not be physically separated, and components shown as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in 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 alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium.
  • a readable storage medium including several instructions to make a device (which may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请公开一种小区切换方法及通信装置，用于提高小区切换成功率。该方法包括：终端设备的第一模块向第二模块发送第一请求消息，并从第二模块获取第一信息，根据第一小区切换列表辅助小区切换，其中，第一请求消息用于请求与第一TAC对应的第一小区切换列表，第一TAC为终端设备当前小区的TAC，第一信息用于指示第一小区切换列表。终端设备可事先存储各个线路对应的小区列表，当终端设备在某个线路上移动，终端设备可根据第一TAC确定该线路对应的小区列表进行小区切换。由于终端设备提前获取了线路可能经过的小区列表，这样终端设备可避免不必要的测量以及避免盲目地切换到通信质量不佳的小区，可降低小区切换失败概率。

Description

一种小区切换方法及通信装置
相关申请的交叉引用
本申请要求在2020年10月30日提交中国专利局、申请号为202011194454.9、申请名称为“一种小区切换方法及通信装置”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
本申请涉及小区切换技术领域，尤其涉及一种小区切换方法及通信装置。
背景技术
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。为了保证终端设备的业务连续性和通信质量，需要终端设备进行小区的重新选择(reselection)或进行小区切换(handover)。小区切换和小区重选都需要终端设备进行小区测量。然而，如果终端设备的移动速度较快，那么终端设备需要频繁地与网络设备交互获取测量配置和邻区列表，终端设备可能需要测量邻区列表中的全部邻区，甚至终端设备还没来得及测量某些邻区，终端设备已经移动出某些邻区的覆盖区域，导致小区切换失败。
发明内容
本申请提供一种小区切换方法及通信装置，用于提高小区切换成功率，降低小区切换时延。
第一方面，提供了一种小区切换方法，该方法可由通信装置执行，该通信装置可以是终端设备或能够支持终端设备实现该方法所需的功能的通信装置，例如芯片系统。下面以该通信装置是终端设备为例进行描述。该方法包括：
终端设备的第一模块向终端设备的第二模块发送第一请求消息，并获取从第二模块传递的第一信息，以及根据第一小区切换列表辅助小区切换，其中，第一请求消息用于请求与第一跟踪区域码(tracking area code，TAC)对应的所述第一小区切换列表，第一TAC为终端设备当前小区的TAC，第一信息用于指示所述第一小区切换列表。该方案中，终端设备可根据终端设备当前小区的第一TAC确定对应的第一小区切换列表来辅助小区切换。对于固定路径的应用场景而言，例如终端设备在固定路径上行进，可不需要将整条固定路径对应的全部小区切换列表读入第一模块，例如调制解调器，从而节省调制解调器的内存，可适用于具有多条固定路径的应用场景。
在一种可能的实现方式中，第一请求消息包含第一TAC，第一TAC对应第一线路，第一小区切换列表为第一线路对应的小区切换列表。该方案中，可预先确定多条线路对应的小区切换列表，应理解，每条线路具有对应的TAC，终端设备的第二模块可确定与第一TAC对应的第一线路，从而确定与第一线路对应的第一小区切换列表。这样不需要网络设备频繁地获取并告知终端设备用于小区切换的小区列表，且终端设备存储的第一小区切换列表占用的内容更少，从而更加节约调制解调器的内存。
在一种可能的实现方式中，第一请求消息还包含第一小区标识，第一线路为对应第一TAC和第一小区标识的线路。该方案即根据第一TAC以及第一小区标识确定对应的线路，从而确定该线路对应的小区切换列表。应理解，由于相同的TAC可对应一个或多个小区，那么相同的TAC可对应一条或多条线路，终端设备根据第一TAC以及第一小区标识可确定较少的线路，从而确定包括较少小区的第一小区切换列表，从而更加节约调制解调器的内存。
在一种可能的实现方式中，在终端设备的第一模块向终端设备的第二模块发送第一请求消息之前，所述方法还包括：
第一模块从第二模块接收TAC列表，该TAC列表中包含TAC与线路的对应关系；
第一模块基于TAC列表确定与第一TAC对应的第一线路；
终端设备的第一模块向终端设备的第二模块发送第一请求消息，包括：第一模块向第二模块发送携带第一线路的第一请求消息。
该方案中，第二模块可向第一模块发送用于指示TAC与线路之间对应关系的TAC列表。应理解，相同TAC可对应一条或多条线路，每条线路具有对应的小区切换列表。第一模块可基于TAC列表以及第一TAC确定第一线路，从而向第二模块请求与第一线路对应的小区切换列表。
在一种可能的实现方式中，在第一模块从第二模块获取第一信息之后，所述方法还包括：
第一模块判断第一线路中是否包含第一小区标识对应的线路，在不包含第一小区标识对应的线路的情况下，重新向第二模块发送第一请求消息。且第二模块可删除第一小区切换列表。应理解，如果第一线路中不包含第一小区标识对应的线路，即根据第一TAC确定的第一小区切换列表中不包括终端设备当前小区，那么可认为第一小区切换列表不是较优的，第二模块删除第一小区切换列表，以节约第二模块的存储空间。另外，第一模块可向第二模块重新请求用于辅助小区切换的小区切换列表，以获取较优的小区切换列表。
在一种可能的实现方式中，第一小区切换列表包括：第一线路上的小区的小区标识、以及每个小区使用的频点信息。
在一种可能的实现方式中，第一模块根据第一小区切换列表辅助小区切换，包括：
第一模块基于第一小区切换列表确定当前频点之后的频点，并对当前频点之后的频点对应的小区进行测量，并向网络设备上报测量结果。该方案中，第一模块可提前确定终端设备可能要经过的频点，从而对这些频点进行测量，不需要网络设备的告知，即减少与网络设的交互。
在一种可能的实现方式中，第一信息中还包括：第二线路对应的第二小区切换列表，第二线路与第一线路不同，且第二线路为第一线路的行进方向上的线路。该方案中，第一信息可包括多条线路对应的小区切换列表，这样第一模块按照当前线路对应的第一小区切换列表辅助小区切换之后，可按照与当前线路距离最近的线路对应的第二小区切换列表来辅助小区切换，从而避免第一小区切换列表包括较少小区导致终端设备频繁获取新的小区切换列表带来的小区切换时延。
在一种可能的实现方式中，第一模块从第二模块获取第一信息之前，所述方法还包括：
第二模块确定第一小区切换列表包含的数据量；第二模块在所述数据量大于或等于数据量阈值时，向第一模块传递第一小区切换列表；第二模块在所述数据量小于所述数据量 阈值时，向第一模块传递第一小区切换列表和第二小区切换列表。该方案中，当第一小区切换列表包括的数据量较少，可认为第一小区切换列表包括的小区较少或者对应的基站数较少，这种情况下，为了避免终端设备频繁获取新的小区切换列表带来的小区切换时延，第二模块可向第一模块发送第一小区切换列表和第二小区切换列表。当然，如果第一小区切换列表包括的数据量较多，终端设备获取新的小区切换列表的概率较低，这种情况下，第二模块可向第一模块发送第一小区切换列表，以尽量节约第一模块的存储空间。
在一种可能的实现方式中，在第一模块根据所述第一小区切换列表辅助小区切换之后，所述方法还包括：第一模块根据第二小区切换列表辅助小区切换。该方案中，可认为先沿着第一小区切换类别对应的线路行进，之后沿着第二小区切换列表对应的线路行进。这种情况下，第一模块根据第一小区切换列表辅助小区切换之后，不需要重新请求小区切换列表，可直接根据第二小区切换列表辅助小区切换，以尽量降低小区切换的时延。
在一种可能的实现方式中，终端设备的第一模块向终端设备的第二模块发送第一请求消息，包括：
第一模块在确定终端设备处于预设模块或者终端设备的移动速度大于预设阈值的情况下向第二模块发送第一请求消息。应理解，终端设备移动速度较快，网络设备需要频繁获取小区切换列表。所以该方案中，当终端设备移动速度较快的情况下，例如终端设备处于高铁模式，才触发第一模块向第二模块发送第一请求消息。
在一种可能的实现方式中，所述第一模块为调制解调器，所述第二模块为应用处理器。
第二方面，提供了另一种小区切换方法，该方法可由通信装置执行，该通信装置可以是终端设备或能够支持终端设备实现该方法所需的功能的通信装置，例如芯片系统。下面以该通信装置是终端设备为例进行描述。该方法包括：
终端设备的第一模块向终端设备的第二模块发送携带第一小区标识的第一请求消息，该第一请求消息用于请求与第一小区标识对应的第一小区切换列表，第一小区标识为终端设备当前小区的标识；
第一模块从第二模块获取第一信息，该第一信息用于指示所述第一小区切换列表；
第一模块根据所述第一小区切换列表辅助小区切换。
在一种可能的实现方式中，第一小区标识对应第一线路，该第一小区切换列表为第一线路对应的小区切换列表。
在一种可能的实现方式中，第一小区切换列表包括：第一线路上的小区标识、以及每个小区使用的频点信息。
在一种可能的实现方式中，第一模块根据所述第一小区切换列表辅助小区切换，包括：
第一模块基于第一小区切换列表确定当前频点之后的频点；
第一模块对当前频点之后的频点对应的小区进行测量，并向网络设备上报测量结果。
在一种可能的实现方式中，第一信息中还包括：第二线路对应的第二小区切换列表，第二线路与第一线路不同，且第二线路为第一线路的行进方向上的线路。
在一种可能的实现方式中，第一模块从第二模块获取第一信息之前，所述方法还包括：
第二模块确定第一小区切换列表包含的数据量；
第二模块在所述数据量大于或等于数据量阈值时，向第一模块传递所述第一小区切换列表；
所述第二模块在所述数据量小于所述数据量阈值时，向第一模块传递所述第一小区切 换列表和所述第二小区切换列表。
在一种可能的实现方式中，在第一模块根据第一小区切换列表辅助小区切换之后，所述方法还包括：
第一模块根据所述第二小区切换列表辅助小区切换。
在一种可能的实现方式中，终端设备的第一模块向终端设备的第二模块发送第一请求消息，包括：
第一模块在确定终端设备处于预设模式或者终端设备的移动速度大于预设阈值的情况下向第二模块发送所述第一请求消息。
在一种可能的实现方式中，第一模块为调制解调器，第二模块为应用处理器。
第二方面与第一方面的不同之处在于，第一模块请求获取与第一小区标识对应的小区切换列表，类似第一方面。第二方面以及第二方面的各个可能的实现方式的具体效果可参考第一方面以及第一方面的各个实现方式的技术效果，这里不再赘述。
第三方面，本申请实施例还提供一种电子设备，该电子设备包括：显示屏，一个或多个处理器；调制解调器；存储器；一个或多个程序；其中所述一个或多个程序被存储在所述存储器中，所述一个或多个程序包括指令，当所述指令被所述电子设备执行时，使得所述电子设备执行如第一方面中任一所述的方法步骤。
第四方面，本申请实施例还提供了一种电子设备，所述电子设备可以包括执行第一方面或者第一方面的任意一种可能的设计的方法的模块/单元；这些模块/单元可以通过硬件实现，也可以通过硬件执行相应的软件实现。
第五方面，本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质包括程序指令，当所述程序指令在电子设备上运行时，使得所述电子设备执行如第一方面中任一项所述的方法。
第六方面，本申请实施例还一种程序产品，当所述程序产品在电子设备上运行时，使得所述电子设备执行如第一方面中任一项所述的方法。
附图说明
图1为本申请实施例提供的某条固定路径上网络部署的示意图；
图2为本申请实施例提供的第二种小区切换方法的流程示意图；
图3为TAC和小区以及线路对应关系的示意图；
图4为本申请实施例提供的第三种小区切换方法的流程示意图；
图5为固定路径划分为多条线路以及多条线路排序的示意图；
图6为本申请实施例提供的第四种小区切换方法的流程示意图；
图7为本申请实施例提供的第五种小区切换方法的流程示意图；
图8为本申请实施例提供的电子设备的一种结构示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
首先，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。
1)网络设备，例如包括接入网(access network，AN)设备，例如基站(例如，接入点)，可以是指接入网中在空口通过一个或多个小区与无线终端设备通信的设备，或者例如，一种车联网(vehicle-to-everything，V2X)技术中的网络设备为路侧单元(road side unit，RSU)。基站可用于将收到的空中帧与IP分组进行相互转换，将来自终端的数据分组传输到核心网设备，或将来自核心网设备的数据分组传输给特定的终端；接入网可包括支持IP网络功能的其他网络侧设备。基站包括一个或多个基带处理单元以及一个或多个射频单元，承载一个或多个蜂窝小区。RSU可以是支持V2X应用的固定基础设施实体，可以与支持V2X应用的其他实体交换消息。网络设备还可协调对空口的属性管理。例如，网络设备可以包括长期演进(long term evolution，LTE)系统或高级长期演进(long term evolution-advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，或者也可以包括第五代移动通信技术(the 5th generation，5G)新空口(new radio，NR)系统(也简称为NR系统)中的下一代节点B(next generation node B，gNB)或者也可以包括云接入网(cloud radio access network，Cloud RAN)系统中的集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)，本申请实施例并不限定。
2)终端设备，包括向用户提供语音和/或数据连通性的设备，具体的，包括向用户提供语音的设备，或包括向用户提供数据连通性的设备，或包括向用户提供语音和数据连通性的设备。例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音或数据，或与RAN交互语音和数据。该终端设备可以包括用户设备(user equipment，UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、V2X终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备、签约单元(subscriber unit)、签约站(subscriber station)，移动站(mobile station)、远程站(remote station)、接入点(access point，AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如，可以包括移动电话(或称为“蜂窝”电话)，具有移动终端设备的计算机，便携式、袖珍式、手持式、计算机内置的移动装置等。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification，RFID)、传感器、全球定位系统(global positioning system，GPS)、激光扫描器等信息传感设备。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端设备，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是车载终端设备，车载终端设备例如也称为车载单元(on-board unit，OBU)。
本申请实施例中，终端设备还可以包括中继(relay)。或者理解为，能够与基站进行数据通信的都可以看作终端设备。
本申请实施例中，用于实现终端的功能的装置可以是终端设备，也可以是能够支持终端实现该功能的装置，例如芯片系统，该装置可以被安装在终端设备中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。本申请实施例提供的技术方案中，以用于实现终端的功能的装置是终端设备为例，描述本申请实施例提供的技术方案。
下面介绍本申请实施例涉及的技术特征。
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Cell Global Identity(小区全局标识，CGI)为例进行描述。为了保证终端设备的业务连续性和通信质量，需要终端设备进行小区的重新选择(reselection)或进行小区切换(handover)。小区切换和小区重选都需要终端设备进行小区测量。例如，网络设备向终端设备发送测量配置信息(measConfig)，该测量配置信息可包括测量对象(measurement object，MO)、测量量配置(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，即网络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，并向网络设备上报测量结果。终端设备可以接收来自多个小区的参考信号，并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)。当终端设备处于空闲(Idle)状态且驻留在服务小区之后，对驻留小区和邻小区进行测量，如果邻小区信号质量和驻留小区的信号质量满足小区重选准则，则终端设备可重选到信号质量更好的小区。
对于处于RRC连接态的终端设备来说，网络设备可配置终端设备测量邻区，例如网络设备可向终端设备发送邻区测量列表。终端设备可对该列表中的邻区进行测量，获得测量结果，例如各个邻区的信号质量。之后终端将邻区的测量结果以及当前为终端设备提供服务的小区(也称为服务小区)的测量结果反馈给网络设备。网络设备根据服务小区的测量结果以及邻区的测量结果，可确定将终端设备切换到信号质量更好的小区上。
小区的重选主要由终端设备实现，在满足一定的触发条件和接入准则之后，终端设备完成小区重选。而小区切换需要网络设备使用一系列无线资源管理(radio resource management，RRM)测量配置以及网络设备根据终端设备的反馈来确定目标小区。如果RRM测量结果满足一定条件，网络设备可以向终端设备发送切换命令，以指示终端设备从一个小区切换到另一个小区。
然而，由于每个蜂窝小区的覆盖范围有限(比如城区的小区覆盖半径大多为几百米，高铁沿线的专网小区覆盖半径最大可能达数公里)，如果终端设备的移动速度较快，终端设备在移动过程中会频繁进行小区重选或小区切换。当终端设备上有通信数据业务正在进行时，处于RRC连接态终端设备需要频繁与网络交互，以从网络设备获取邻区测量配置 信息，并按照基站指令进行测量，且终端设备可能需要切换频点进行异频测量，在此过程中，容易出现服务小区信号质量下降太快、终端测量量太多不能及时上报测量结果，而导致切换过程中信令交互失败的现象，进而导致小区切换失败。
例如在可能的场景中，终端设备处于高铁、地铁等移动速度较快的交通工具上，那么终端设备随着交通工具的移动而移动。由于终端设备的移动速度较快，那么终端设备也较快地一个小区切换到另一个小区。然而网络设备并不能确切地知道终端的移动方向，将会把所有与当前服务小区关联的小区都作为邻区，通过测量配置信息指示终端设备进行测量。一方面，邻区数量可能较多；另一方面，对有固定移动方向的终端设备来说，有一部分邻区其实不需要测量。尤其在高铁沿线，有的运营商部署了高铁通信专网，同时也部署了为公众提供服务的非高铁通信网络；但服务小区可能将高铁通信专网中的小区和非高铁通信网络中的小区都配置为邻区，但实际上，如果随高铁运动的终端设备接入非高铁通信网络的小区，可能会导致通信性能下降，比如频繁出现切换失败。因此，数量众多或不必要的邻区测量配置会导致测量时间过长、上报不及时等结果，进而导致切换失败。此外，测量过程中信号质量较佳的小区并不意味着终端设备切换过去后通信质量也会好。比如，在高铁通信中，如果终端设备切换到测量时刻信号质量较好但覆盖范围较小的小区，因切换区间缩小，切换次数增加，反而增加了切换失败的概率。
应理解，如果交通工具沿着既定的线路行进，例如高铁或地铁的运行线路是固定的，沿线的网络部署和参数配置也相对稳定，用户携带终端设备搭乘这些交通工具时所经历的小区以及后续的目标小区都相对较为明确。为了便于描述，下文中将终端设备随用户搭乘的高铁、地铁等交通工具移动时所经历的固定线路或者用户经常经过的相同路径称为固定路径。地铁线路、高铁线路和公路等道路沿线部署的通信网络的参数配置通常相对稳定，终端设备经过固定路径时，所经历的基站或小区也相对稳定。
由于固定路径对应的小区通常是相对稳定的，因此，本申请实施例提供了一种小区切换方法。在该方法中，终端设备可按照固定路径对应的小区列表，辅助终端设备进行小区切换。例如，终端设备可事先存储各个固定路径分别对应的小区列表，当终端设备在某个固定路径上移动，终端设备可根据该固定路径对应的小区列表进行小区切换。由于终端设备提前获取了固定路径可能经过的小区列表，这样终端设备可避免不必要的测量以及避免盲目地切换到通信质量不佳的小区，可降低小区切换失败、RRC重建立的概率。
例如，终端设备对与固定路径对应的小区列表中的小区进行测量，并将测量结果反馈给网络设备，便于网络设备选择终端设备要切换到的小区。应理解，终端设备所存储的与某条固定路径对应的小区列表包括该条固定路径上所能获取的全部小区，然而终端设备在移动过程中，应切换到终端设备还未经过的小区。因固定路径对应的小区列表是按小区分布的顺序排列，终端设备在固定路径上的切换记录，例如切换的小区，可以用于判断终端设备的移动方向。因此，终端设备可根据终端设备的移动方向，确定测量固定路径对应的小区列表中与终端设备的移动方向相匹配的部分小区，而不需要测量全部的小区，以避免测量不必要的小区，例如不必测量与移动方向相反方向上的小区，这样终端设备可节省测量时间以及节约终端设备的能耗。
为了便于理解，下面结合附图介绍本申请实施例提供的小区切换方法。由于固定路径对应的小区列表中的部分小区或全部小区用于终端设备的切换，所以该小区列表也可以称为小区切换列表。为便于描述，下文中将针对固定路径对应的小区列表称为预置小区切换 列表(或，也可以简称为预置路径)。本申请实施例中预置小区切换列表包括多个按顺序排列的小区信息，每条小区信息包含以下至少一种信息：小区标识、频点信息、TAC(Tracking Area Code，跟踪区域代码)、PLMN(Public Land Mobile Network，公共陆地移动网)信息、PCI(Physical Cell Identity,物理小区标识)等。预置小区切换列表中的小区可按一定的规则进行分组，每组包含一个或多个小区，每一组可称为一个节点，因此划分组也可称为划分节点。本申请实施例中，按照地理上的分布情况对预置小区切换列表中的小区进行分组或者划分节点。
示例性的，请参见图1，为本申请实施例提供的示例性的固定路径上网络部署的示意图。应理解，有的地理区间上，运营商部署的小区数较多，可获得更好的覆盖性能；有的地理区间上，受部署条件或环境等影响，部署的小区数较少。图1示例的固定路径上的蜂窝通信网络包括3个节点，分别对应各自的网络设备，这3个网络设备为网络设备1、网络设备2和网络设备3。应理解，本申请中的一个节点也可以包括一个或多个网络设备所承载的全部小区，而一个网络设备所承载的多个小区有可能划分到不同的节点。如图1所示，节点1的网络设备1承载3个小区(ce11)，这3个cell的小区标识分别记为cell1、cell2和cell3；节点2的网络设备2承载1个ce11，小区标识记为cell4；节点3的网络设备3承载2个ce11，小区标识记为cell5和cell6。示例性地，cell1对应的频点为f1，cell2对应的频点为f2，cell3对应的频点为f3，cell4对应的频点为f2，cell5对应的频点为f2，cell6对应的频点为f1。
由于图1所示路径上对应的小区是相对稳定的，即如图1中的cell1-cell6。因此对于图1的固定路径的网络部署来说，该固定路径对应的预置小区切换列表是固定或相对稳定的。图1中可以按照小区的覆盖范围、地理上的分布或网络的部署情况确定预置小区切换列表。例如预置小区切换列表可表示为{{(cell1，f1)，(cell2，f2)，(cell3，f3)}、{(cell4，f2)}、{(cell5，f2)，(cell6，f1)}}。即该段预置小区切换列表划分为三个节点：节点1包含三个小区，节点1的属性信息包含该三个小区的属性信息{(cell1，f1)，(cell2，f2)，(cell3，f3)}；节点2包含1个小区，节点2的属性信息包含该1个小区的属性信息{(cell4，f2)}；节点3包含2个小区，节点3的属性信息包含该2个小区的属性信息{(cell5，f2)，(cell6，f1)}。除了小区标识和频点信息，小区的属性信息还可以包括其他信息，本申请不做限制。
终端设备可预先存储预置小区切换列表，并根据终端设备的移动方向预先判断后续可能经过的小区。例如终端设备当前处于cell4的覆盖范围，且已接入到Cell4，并且终端设备已经记录了从Cell2切换到Cell4的信息，终端设备根据上述切换记录和预置小区切换列表中的小区分组和排列信息，可判断终端设备是从网络设备2向网络设备3的方向移动，那么当终端设备接收到的Cell4的RSRP、RSRQ、RSSI、SINR中的至少一种满足测量触发条件时，可预先判断终端设备可能经过cell5和cell6，并可根据预先存储的预置小区切换列表优先对cell5和cell6进行测量，并将获得的测量结果发送给网络设备。由于终端设备提前判断并测量可能经过的小区，所以可降低小区切换失败、RRC重建立的概率。
通常来说，预置小区切换列表属于终端设备的应用层信息。应用层的某个应用程序(Application，缩写为APP)从终端设备的内存(例如只读存储器)中或从网络服务器获取预置小区切换列表。在架构划分上，APP位于终端设备内的应用处理器(Application Processor，AP)模块，其需要将预置小区切换列表传递给终端设备的调制解调器(Modem)模块，该Modem模块可存储部分或全部由APP传递的预置小区切换列表。本申请中，在 不引起混淆的情况下，APP上的操作可理解为是AP模块进行的操作。
固定路径例如高铁沿线的蜂窝网络通常都沿着线路部署，因此固定路径的预置小区切换列表，可按照固定路径的区间划分成多段或多条线路。以高铁沿线的蜂窝网络为例，高铁京沪线路和高铁京广线路上的预置小区切换列表可以按高铁线划分成至少两段或两条，一段包括京沪线路上的预置小区切换列表，一段包括京广线路上的预置小区切换列表；进一步地，还可以对京沪线路上预置小区切换列表按照网络部署情况等划分成更小的段，这些小段的预置小区切换列表，本申请中称为线路(line)。可选的，还可以用其他名称来表示小段的预置小区切换列表，本申请不做限定。
图1以一条固定路径的网络部署为例。应理解，终端设备可以在多条固定路径上移动。例如终端设备可随着高铁移动，那么终端设备可在全国的铁路线路上移动。终端设备可以在全国的铁路线路上移动，也可以在某一城市的某条公路或某条地铁线上移动。为了辅助终端设备在不同固定路径上移动时的小区切换，终端设备可预先存储多个固定路径上对应预置小区切换列表。终端设备也可以根据实际所处的位置或所接入的小区，实时地从网络侧设备(例如网络服务器、基站等)获得相应路径上的预置小区切换列表。
由于终端设备存储多个固定路径分别对应的预置小区切换列表需要的存储空间较大，本申请实施例也可根据终端设备当前经过的小区调整存储到终端设备中modem模块的预置小区切换列表，从而不需要存储全部的预置小区切换列表，以尽量节约modem模块的存储空间。下面结合附图介绍本申请实施例提供的第二种小区切换方法。
请参见图2，为本申请实施例提供的第二种小区切换方法的流程示意图，该方法可根据终端设备当前的服务小区(如果是Idle态，则为驻留小区)所对应的TAC选取与该TAC关联的小区切换列表。终端设备可根据该小区切换列表执行小区切换。该方法的流程描述如下。
S201、终端设备的应用处理器向调制解调器中的公共搜网模块(common search service，CSS)发送第一信息，该第一信息用于指示TAC列表，所述TAC列表包括TAC与线路的对应关系。
应理解，终端设备在固定路径上移动，在移动过程中，会经过固定路径上部署网络，预置小区切换列表按照网络的部署或覆盖特点，将列表中的小区划分为多个节点，每个节点可包括一个或多个小区，每个小区都拥有各自的TAC。在实际网络部署中，有时候，网络运营商或网络监管机构会为一个城市分配一个或多个TAC地址，也可能多个城市共享同一个TAC地址，以便于网络维护或管理。一个TAC地址下，可能包括多个蜂窝小区。即，多个小区可能归属于不同的TAC，或者相同的TAC。某个小区的TAC信息可从小区发送的消息中获得，例如从广播消息中获得。终端设备获取到对应小区的TAC信息后，可将对应小区的Cell ID(例如CGI)和TAC信息上报给网络侧设备，从而网络侧设备可维护小区标识和TAC之间的关联关系。网络侧设备可根据终端设备上报的上述信息以及终端设备进行通信时的小区切换关系，生成预置小区列表。本申请实施例可根据当前终端的驻留小区(或服务小区)所对应的TAC选取与该TAC关联的小区切换列表，这样就不需要将整条固定路径对应的全部小区切换列表读入调制解调器模块，从而节省调制解调器模块的内存，可适用于具有多条固定路径的应用场景。
当终端设备在某条固定路径，例如第一路径上移动，终端设备可将该第一路径对应的TAC信息告知CSS。在可能的实现方式中，可将第一路径划分为多条线路。应理解，每条 线路与TAC具有对应关系，一条线路可对应一个或多个TAC，一个TAC也可对应一条或多条线路。示例性的，如表1所示，为线路与TAC之间对应关系的一种示意。
表1线路与TAC的对应关系表
线路编号(Line ID) TAC
… …
1 TAC2
1 TAC3
1 TAC4
2 TAC4
2 TAC5
2 TAC6
… …
可选地，一张对应关系表中也可以仅包括一条线路(line)的线路与TAC的对应关系，每条线路与TAC的对应关系可划分到不同的对应关系表。比如，表1中，可以只包含LineID为1的线路及其对应的TAC信息。例如，线路1与TAC的对应关系如表2所示：
表2
Line ID(线路编号) TAC
… …
1 TAC2
1 TAC3
1 TAC4
线路2与TAC的对应关系如表3所示：
表3
Line ID(线路编号) TAC
2 TAC4
2 TAC5
2 TAC6
… …
不同的TAC可对应相同的小区，也可以对应不同的小区，一个TAC可包括一个或多个节点。那么每条线路与TAC、节点和小区的对应关系，如表4所示。
表4线路与TAC、节点和小区的对应关系表
线路编号(Lind ID) TAC 节点编号(Node ID) 小区标识(Cell ID)
n TAC1 x c1
n TAC1 x c2
n TAC2 y c3
… … … …
在表4中，n表示线路编号，编号为x的节点包含2个小区，编号为y的节点包含1个小区。
在本申请实施例中，终端设备确定自身的移动速度较快的情况下，终端设备的APP可向CSS发送第一信息，该第一信息可用于指示与第一路径对应的TAC列表。这样CSS可知道终端设备在移动过程中对应的是哪一条线路的TAC，从而结合当前服务小区(Idle状态下为驻留小区)的TAC从与第一路径关联的小区切换列表中确定与该TAC关联的小区 切换列表，从而可优先测量移动方向上的小区，以辅助小区切换。
第一信息可承载于(attention command，AT)命令，也可以承载在其他可能的命令，本申请实施例对此不作限制。另外，本申请实施例对第一信息的具体实现形式不作限制。
示例性的，第一信息可携带如表1所示的对应关系。CSS接收该第一信息，可获取第一信息中多条线路与TAC的对应关系，并存储该对应关系。或者表1是预定义的，第一信息可携带表1的标识(索引)。CSS接收该第一信息，可根据表1的标识(索引)确定多条线路与TAC的对应关系，并存储该对应关系。
在一些实施例中，终端设备检测到自身的移动速度大于预设阈值，终端的APP向CSS发送第一信息。在另一些实施例中，可设置终端设备的多种工作模式，例如高铁模式，普通模式，在终端设备确定自身处于高铁模式的情况下，终端的AP向CSS发送第一信息。需要说明的是，高铁模式和普通模式是相对而言的，高铁模式表示终端设备的移动速度较快，普通模式表示终端设备的移动速度较慢。例如终端设备的移动速度较快，那么终端设备进入高铁模式，终端设备的APP可获取终端的工作模式，又例如，终端设备可检测来自网络设备的一个或多个小区标识，从而确定这一个或多个小区是否具有高铁小区标识，(例如，HighSpeedFlag)，只要一个或多个小区具有高铁小区标识，那么终端设备可认为终端的工作模式是高铁模式。当然，本申请实施例不限制终端设备确定是否工作在高铁模式的方式。
在一些实施例中，当终端设备检测或搜索到经常经过的固定路径的一个或多个小区时，终端的APP向CSS发送第一信息。该第一信息，可以是终端设备的APP向网络侧设备实时获取或提前获取，也可以是终端设备通过自身的计算能力获得并存储在内存中。
在一些实施例中，终端设备可以在获得第一信息后立即存储到内存中，而不需要其他触发条件。
S202、终端设备的RRC向CSS发送第二信息，该第二信息用于指示终端设备当前驻留小区的TAC信息。
终端设备的Modem模块中的RRC子模块可获取终端设备当前服务小区对应的TAC，例如第一TAC，并将第一TAC传递给APP，以向APP请求与该第一TAC关联的小区切换列表。
在一些实施例中，终端设备的Modem模块实时获得终端设备的状态信息，从而根据状态信息上报当前服务小区的TAC。例如，当终端设备检测到处于高铁模式时，每接入一个小区都向CSS传递该服务小区所归属的TAC信息。
一般地，在终端芯片模块划分中，Modem模块中实现LTE的RRC功能的子模块称为LRRC模块；类似的，Modem模块中实现NR的RRC功能的子模块称为NRRC模块。
终端设备获取了第一TAC，终端设备的RRC可向CSS发送第二信息，该第二信息可携带第一TAC。
S203、终端设备的CSS向APP发送第一请求消息，该第一请求消息用于请求与第一TAC对应的第一小区切换列表。
终端设备的CSS接收第二信息之后，可在如上述表1-表4中的一个或多个表中查找与该第一TAC对应的一条或多条线路。之后，CSS将这一条或多条线路的标识传递给APP，用于请求与第一TAC对应的小区切换列表。例如CSS向APP发送用于请求与这一条或多条线路对应的小区切换列表的请求消息，例如第一请求消息。该第一请求消息可携带这一 条或多条线路的编号或标识。
例如，第一TAC是TAC4，CSS接收第二信息之后，根据表1确定与TAC4对应的线路包括线路1和线路2。CSS可向APP发送携带线路1的编号和线路2的编号的第一请求消息。
在一种实施例中，CSS将获取的当前服务小区的TAC信息传递给APP，APP根据线路与TAC的对应关系获取线路信息，即，第一请求消息中携带TAC信息。
S204、终端设备的APP向CSS发送第三信息，该第三信息用于指示第一小区切换列表。
终端设备的APP接收第一请求消息之后，可根据第一请求消息携带的一条或多条线路的编号以及表2确定与这一条或多条线路对应的一个或多个小区信息，即确定第一小区切换列表。沿用S203中的例子，即第一请求消息包括线路1的编号和线路2的编号，APP接收第一请求消息中的线路编号信息，从表2中获取与线路1和线路2对应的小区标识，例如小区标识为c1、c2，那么终端设备可确定第一小区切换列表包括的小区标识为c1和c2。在一些实施例中，APP可以将线路1和线路2中全部的小区切换列表信息传递给CSS，即终端设备确定的第一小区切换列表包括c1、c2和c3。
终端设备确定第一小区切换列表之后，可向CSS发送第一小区切换列表，例如终端设备的APP向CSS发送第三信息，该第三信息可携带包含一个或多个小区信息的第一小区切换列表。该第三信息中的第一小区切换列表中的小区信息已经按照切换关系、分布、网络部署特点等进行排列，即小区信息存在先后顺序。终端设备的CSS可存储第一小区切换列表，而不需要存储整条固定路径对应的小区切换列表，从而可节约CSS的存储空间。
S205、终端设备的CSS向RRC发送通知消息，该通知消息用于指示第一小区切换列表。
终端设备的CSS存储第一小区切换列表后，可向RRC告知终端当前驻留小区相关的线路的小区切换列表。
本申请实施例通过交互TAC，终端中的CSS可动态地存储将当前驻留小区所对应的TAC关联的小区切换列表，而不需要存储整条固定路径对应的小区切换列表，从而节省CSS的存储空间。
应理解，如果某个TAC对应的线路中包括的小区或节点数量较多，受CSS内存大小的限制，那么对于同一个TAC地址对应的多条线路来说，这多条线路中的部分线路对应的小区切换列表可能无法存储到CSS。受CSS内存大小的限制，排在后面的部分线路对应的小区切换列表无法存储到CSS。这样会导致终端无法识别到排在后面的部分线路对应的小区，即无法辅助切换到更合适的小区。
例如，请参见图3，为TAC和小区以及线路对应关系的示意图。图3以终端当前驻留小区对应的TAC为TAC1为例。在图3中，TAC1覆盖了两条线路，这两条线路为线路1和线路2，其中线路1对应的小区包括cell1-celln，线路2对应的小区包括cellxa-cellxn。假设，终端当前驻留小区是cellxc，终端的RRC将cellxc对应的TAC(TAC1)发送给CSS，CSS向APP请求cellxc对应的TAC(TAC1)对应的小区切换列表。APP确定与TAC1对应的小区切换列表，即cell1-celln，以及cellxa-cellxn，并将该小区切换列表发送给CSS。CSS按照先后顺序存储cell1-celln，以及cellxa-cellxn。但是由于CSS内存大小的限制，CSS可能只能存储如图3虚线以上的小区切换列表。即CSS存储的小区切换列表不包括cellxc， 那么RRC从CSS中获知的小区切换列表也不包括cellxc，这就无法辅助终端设备无法切换到更合适的小区，例如Cellxd。
鉴于此，本申请实施例提出了第三种小区切换方法，该方法中，可根据TAC和小区标识从整条固定路径对应的小区切换列表中选择合适的小区切换列表，以降低终端无法识别到排在后面的小区对应的线路的概率，尽量保证终端设备切换到更合适的小区。
请参见图4，为本申请实施例提供的第三种小区切换方法的流程示意图。该方法的流程描述如下。
S401、终端设备的APP向CSS发送第一信息，该第一信息用于指示TAC信息。
S401的具体实现同前述S201的具体实现，具体参考S201的相关介绍，这里不再赘述。在一些实施例中，TAC信息(列表)，即线路与TAC的对应关系，可以只存储在APP中，而不用存储在CSS内存中。
S402、终端的RRC向CSS发送第二信息，该第二信息用于指示终端当前服务小区的TAC信息以及小区标识。
S402与前述S202的不同之处在于，终端设备的RRC除了通知CSS，终端设备当前服务小区的TAC信息之外，还通知CSS，终端设备当前服务小区的标识。例如，终端设备的RRC可向CSS发送第二信息，该第二信息可携带终端设备当前服务小区的TAC信息以及当前服务小区的小区标识。例如第二信息携带与当前服务小区对应的第一TAC以及第一小区标识。
S403、终端设备的CSS向APP发送第一请求消息，该第一请求消息用于请求与第一TAC以及第一小区标识对应的第二小区切换列表。
在一种实现方法中，S403的具体实现可参考前述S203的具体实现，例如CSS接收第二信息之后，可根据第一TAC选择与第一TAC以及第一小区标识对应的一条或多条线路，之后，CSS将这一条或多条线路以及第一小区标识信息通知给APP，用于请求与第一TAC以及第一小区标识对应的第二小区切换列表，这里不再赘述。S403与S203的不同之处在于，第一请求消息还携带第一小区标识。
在一种实现方法中，终端设备的CSS向APP发送的第一请求消息包含第一TAC和第一小区标识。即，终端设备的CSS可以不用根据第一TAC选择与第一TAC以及第一小区标识对应的一条或多条线路。
S404、终端设备的APP根据第一TAC以及第一小区标识确定第二小区切换列表。
终端的APP接收第一请求消息之后，可根据第一TAC以及第一小区标识确定第二小区切换列表，并将该第二小区切换列表发送给CSS。例如，如图3所示，与第一TAC例如TAC1对应的线路包括线路1(Line 1)和线路2(Line 2)，第一小区标识Cell3对应的线路为线路1(Line 1)，则APP可根据第一TAC(TAC1)和第一小区标识(Cell3)确定第二小区列表为线路1所包含的小区切换列表。
S405、终端设备的APP向CSS发送第三信息，该第三信息用于指示第二小区切换列表。
S405的具体实现可参考前述S204的具体实现，不同之处在于，S405中的第三信息可携带第二小区切换列表中的一个或多个小区标识，例如cell2和cell3的标识。由于第二切换小区列表包括与第一小区标识对应的小区，即CSS存储的小区切换列表包括终端设备的服务小区，可降低终端设备无法识别到排在预置小区切换列表后面的部分线路对应的小区 的概率，尽量保证终端设备可以切换到更合适的小区。
应理解，如果某线路上部署网络设备较少，那么该线路包括的小区或节点较少，那么第二小区切换列表包括的小区也较少。这种情况下，终端设备按照第二小区切换列表进行小区切换，当终端设备切换完第二小区切换列表包括的全部小区，终端设备还需要重新获取新的小区切换列表。即终端设备的APP需要重新识别行进路径，并向CSS重新发送第一信息，终端设备的RRC重新向CSS发送第二信息，CSS重新存储新的小区切换列表。由于CSS重新存储新的小区切换列表之前需要从整条固定路径对应的小区切换列表中根据小区标识和/或TAC匹配对应的小区切换列表，这样会导致小区切换的延时。甚至由于终端设备移动速度较快，在获取新的小区切换列表之前，终端设备已经行进较长距离，那么获取的新小区切换列表是无效的，即终端设备无法切换到新小区切换列表包括的小区。
为此，本申请实施例可对与第一TAC对应的多条线路进行优先级排序，例如，本申请实施例可根据线路之间的距离进行优先级排序，距离最近的线路的优先级最高，也就是距离最近的线路排在当前节点的线路之后。CSS除了存储与第一小区标识对应的第二小区切换列表之外，可按照线路的优先级排序存储对应的小区切换列表。这样终端设备优先按照第二小区切换列表的小区进行切换，之后可继续按照CSS存储的其他小区切换列表进行切换，从而避免第二小区切换列表包括较少小区导致终端设备频繁获取新的小区切换列表带来的小区切换时延。
示例性的，请参见图5，为固定路径划分为多条线路以及多条线路排序的示意图。图5以包括5条线路为例，这5条线路分别为线路1、线路2、线路3、线路4以及线路5。在一些实施例中，可计算任意一条线路的首端节点(末端节点)的地理位置分别与多条线路的首端节点(末端节点)的地理位置之间的距离，可选择距离最近的节点所在线路的优先级最高，即选择距离最近的节点所在线路排列在当前节点所在线路之后。例如计算线路1的首端节点的地理位置分别与线路2到线路4的首端节点的地理位置之间的距离，根据距离的大小可确定线路1-线路5的排序依次是线路1、线路2、线路3、线路4以及线路5。
在另一些实施例中，可计算任意一条线路的首端节点(末端节点)与多条线路的首端节点(末端节点)之间的路径距离，即计算任意两条路径选定的节点之间切换关系上的跳转次数，即两个选定的节点跳转多少次。同样可选择距离最近的节点所在线路的优先级最高，即选择距离最近的节点所在线路排列在当前节点所在线路之后。例如计算线路1的首端节点分别与线路2到线路4的首端节点之间的路径距离，根据路径距离的大小可确定线路1-线路5的排序依次是线路1、线路2、线路3、线路4以及线路5。
以第一小区标识对应的线路包括线路1，第一TAC对应的线路包括线路1、线路4和线路5为例。应理解，终端设备根据第一小区标识以及第一TAC切换的第二小区切换列表包括的小区对应线路1。如果线路1包括的小区或节点较少，那么终端设备需要先重新获取新的小区切换列表，例如线路4对应的小区切换列表，之后按照线路4对应的小区切换列表进行切换。但是本申请实施例事先对与第一TAC对应的多条线路进行排序，例如依次为线路1、线路4以及线路5。那么CSS除了存储第二小区切换列表，还按照顺序存储线路4以及线路5分别对应的小区切换列表。这样终端设备按照第二小区切换列表进行小区切换之后，可继续按照与线路4对应的小区切换列表进行切换，以及后续按照与线路5对应的小区切换列表进行切换。这样就不需要终端设备重新获取线路4以及线路5分别对应的小区切换列表，可节约小区切换过程中识别线路导致的时延。
需要说明的是，CSS可按照多条线路的优先级顺序存储多个小区切换列表。这多条线路的优先级顺序与终端设备的移动方向一致，例如，可按照终端设备的移动方向顺序选择多条线路。为了便于理解，沿用图5所示的例子。在图5中，由于线路1的拆分，存在线路2和线路3，即线路2和线路3与线路1存在交点。按照终端设备的移动方向对线路1-线路5进行排序，如果当前驻留小区的小区标识在线路1上，按照终端设备的移动方向，优先选择编号邻近的线路2和线路3。
或者，这多条线路的优先级顺序与终端设备的移动方向相关性较大，可按照相关性大小顺序选择多条线路。这里的相关性可根据多条线路之间的路径距离来衡量，且相关性大小是相对而言的。例如，在终端设备移动方向上与当前线路编号较为邻近的编号对应的线路是与终端设备移动方向相关性较大的线路，即线路编号越邻近，相关性越大。为了便于理解，沿用图5所示的例子。线路2和线路3与线路1存在交点。按照终端设备的移动方向对线路1-线路5进行排序，如果当前驻留小区的小区标识在线路1上，按照终端设备的移动方向，选择与线路1的编号邻近的编号对应的线路，即线路2、线路3、线路4和线路5。这种情况下，终端设备可存储尽量多的线路对应的小区切换列表，进一步节约小区切换时延。
S406、终端设备的CSS向RRC发送通知消息，该通知消息用于指示第二小区切换列表。
终端设备的CSS存储第二小区切换列表，可向RRC告知终端设备当前服务小区相关的线路的小区切换列表。
本申请实施例根据TAC和小区标识从整条固定路径对应的小区切换列表中选择合适的小区切换列表，以降低终端设备无法切换到排在后面的部分线路对应的小区的概率，尽量保证终端设备切换到更合适的小区。
上述图4中，终端设备的APP根据CSS发送的第一TAC以及第一小区标识确定第二小区切换列表，作为一种可替换的方案，本申请实施例提供第四种小区切换方法，该方案中，终端设备的APP可根据第一TAC确定第一小区切换列表，进一步地，终端设备的CSS根据第一小区标识从第一小区切换列表中确定第二小区切换列表。具体的，请参见图6，为本申请实施例提供的第四种小区切换方法的流程图，该方法的流程描述如下。
S601、终端设备的APP向CSS发送第一信息，该第一信息用于指示与第一路径对应的TAC列表。
S601的具体实现同前述S201的具体实现，具体参考S201的相关介绍，这里不再赘述。
S602、终端设备的RRC向CSS发送第二信息，该第二信息用于指示终端设备当前服务小区的TAC信息以及小区标识。
S602的具体实现同前述S402的具体实现，具体参考S402的相关介绍，这里不再赘述。
S603、终端设备的CSS向APP发送第一请求消息，该第一请求消息用于请求与第一TAC对应的第二小区切换列表。
S603的具体实现同前述S203的具体实现，具体参考S203的相关介绍，这里不再赘述。
S604、终端设备的APP向CSS发送第三信息，该第三信息用于指示第一小区切换列表。
S604的具体实现同前述S204的具体实现，具体参考S204的相关介绍，这里不再赘述。
S605、终端设备的CSS根据第一小区标识以及第一小区切换列表确定第二小区切换列 表。
终端设备的CSS可根据第一小区标识从第一小区切换列表中确定第二小区切换列表。在一些实现中，终端的CSS可能因内存限制只获取到一部分第一小区切换列表中的小区信息，如果这些小区信息中包括第一小区标识，则继续S606；否则，删除已获取的小区切换列表信息，返回S603，继续从APP中获取小区信息，直至获取到包括第一小区标识的线路信息。
S606、终端设备的CSS向RRC发送通知消息，该通知消息用于指示第二小区切换列表。
S606的具体实现同前述S406的具体实现，具体参考S406的相关介绍，这里不再赘述。
需要说明的是，图6所示的实施例与图4所示的实施例的不同之处在于，图4所示的实施例中，终端设备的APP根据第一TAC以及第一小区标识确定第二小区切换列表，图6所示的实施例中，终端设备的APP根据第一TAC先确定第一小区切换列表，之后终端设备的CSS根据第一小区标识确定第二小区切换列表。图6实施例中相关技术方案可沿用图4实施例中的相关方案，例如图6所示实施例中，也可以优先对第一TAC对应的多条线路进行优先级排序等，这里不再赘述。
上述图2、图4以及图6中，终端设备的APP根据CSS发送的第一TAC确定第一小区切换列表，作为一种可替换的方案，本申请实施例提供第五种小区切换方法，该方案中，终端设备的APP可根据第一小区标识确定第一小区切换列表。具体的，请参见图7，为本申请实施例提供的第五种小区切换方法的流程图，该方法的流程描述如下。
S701、终端设备的APP向CSS发送第一信息，该第一信息用于指示与第一路径对应的TAC列表。
S701的具体实现同前述S201的具体实现，具体参考S201的相关介绍，这里不再赘述。
在一些实施例中，终端设备的APP也可以不向CSS发送第一信息。
S702、终端设备的RRC向CSS发送第二信息，该第二信息用于指示终端设备当前服务小区的标识。
S703、终端设备的CSS向APP发送第一请求消息，该第一请求消息用于请求与第一小区标识对应的第一小区切换列表，第一小区标识为终端设备当前服务小区的标识。
S703的具体实现同前述S203的具体实现，不同之处在于，第一请求消息携带第一小区标识，具体参考S203的相关介绍，这里不再赘述。
S704、终端设备的APP向CSS发送第三信息，该第三信息用于指示第一小区切换列表。
S704的具体实现同前述S204的具体实现，具体参考S204的相关介绍，这里不再赘述。
S705、终端设备的CSS向RRC发送通知消息，该通知消息用于指示第一小区切换列表。
S705的具体实现同前述S406的具体实现，具体参考S406的相关介绍，这里不再赘述。
需要说明的是，在本申请的所有实施例中，当终端设备处于RRC连接态时，所接入的小区称为服务小区；而当终端设备处于RRC空闲态(RRC_IDLE)时，所驻留的小区称为驻留小区。在上述实施例中，如果终端设备处于RRC空闲态，则实施例中的服务小区替换为驻留小区，使得方法同样适用于RRC空闲态。
本申请实施例可以应用于支持小区切换功能的电子设备。其中，本申请实施例的电子 设备又可以称之终端、终端设备、用户设备(user equipment，UE)等。示例的，本申请实施例的电子设备可以为便携式电子设备，诸如手机、平板电脑、具备无线通讯功能的可穿戴设备(如智能手表)等可以安装APP的设备。便携式电子设备的示例性实施例包括但不限于搭载
Figure PCTCN2021124697-appb-000001
或者其它操作系统的便携式电子设备。
示例性的，图8示出了本发明实施例可能应用到的一种电子设备的结构图。请参阅图8所示，所述电子设备800可以包括处理器810、内部存储器821、外部存储器接口822、天线1、移动通信模块831、天线2、无线通信模块832、音频模块840、扬声器840A、受话器840B、麦克风840C、耳机接口840D、显示屏851、用户标识模块(subscriber identification module，SIM)卡接口852、摄像头853、按键854、传感器模块860、通用串行总线(universal serial bus，USB)接口870、充电管理模块880、电源管理模块881和电池882。其中，传感器模块860可以包括触摸传感器860A，指纹传感器860B。在另一些实施例中，传感器模块860还可以包括陀螺仪传感器，压力传感器，加速度传感器，距离传感器，距离传感器，接近光传感器，温度传感器，骨传导传感器等。在另一些实施例中，电子设备800还可以包括按键854、指示器855、马达856等。
可以理解的是，本发明实施例示意的结构并不构成对电子设备800的具体限定。在本申请另一些实施例中，电子设备800可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
其中，处理器810可以包括一个或多个处理单元。例如：处理器810可以包括应用处理器(application processor，AP)、调制解调处理器(也可简称为调制解调器)、图形处理器(graphics processing unit，GPU)、图像信号处理器(image signal processor，ISP)、控制器、视频编解码器、数字信号处理器(digital signal processor，DSP)、基带处理器、和/或神经网络处理器(neural-network processing unit，NPU)等。其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。其中，控制器可以是电子设备800的神经中枢和指挥中心。控制器810可以根据指令操作码和时序信号，产生操作控制信号，完成取指令和执行指令的控制。本申请实施例中，处理器810可以通过执行程序指令，完成将至少两个智能家居设备的控制界面合并或者分离的过程，实现相应的显示效果。
在一些实施例中，处理器810中还可以设置存储器，用于存储指令和数据。示例的，处理器810中的存储器可以为高速缓冲存储器。该存储器可以用于保存处理器810刚用过或循环使用的指令或数据。如果处理器810需要再次使用该指令或数据，可从该存储器中直接调用。从而有助于避免重复存取，减少了处理器810的等待时间，因而提高了系统的效率。
内部存储器821可以用于存储计算机可执行程序代码。所述可执行程序代码包括指令。处理器810通过运行存储在内部存储器821的指令，从而执行电子设备的各种功能应用以及数据处理。内部存储器821可以包括存储程序区和存储数据区。其中，存储程序区可存储操作系统，至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等。存储数据区可存储电子设备使用过程中所创建的数据(比如智能家居设备的图像数据等)等。此外，内部存储器821可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、通用闪存存储器(universal flash storage，UFS)等。本申请实施例中内部存储器821中可以存储用于合并或分离至少两个智能家居设备的控制界 面的指令或代码。
外部存储器接口822可以用于连接外部存储卡(例如，Micro SD卡)，实现扩展电子设备的存储能力。外部存储卡通过外部存储器接口822与处理器810通信，实现数据存储功能。例如将音乐、视频等文件保存在外部存储卡中。
电子设备800的无线通信功能可以通过天线1，天线2，移动通信模块831，无线通信模块832，调制解调处理器以及基带处理器等实现。
天线1和天线2用于发射和接收电磁波信号。电子设备800中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如：可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。
移动通信模块831可以提供应用在电子设备800上的包括2G/3G/8G/5G等无线通信的解决方案。移动通信模块831可以包括至少一个滤波器、开关、功率放大器、低噪声放大器(low noise amplifier，LNA)等。移动通信模块831可以由天线1接收电磁波信号，并对接收的电磁波信号进行滤波、放大等处理，传送至调制解调处理器进行解调。移动通信模块831还可以对经调制解调处理器调制后的信号放大，经天线1转为电磁波信号辐射出去。在一些实施例中，移动通信模块831的至少部分功能模块可以被设置于处理器810中。在一些实施例中，移动通信模块831的至少部分功能模块可以与处理器810的至少部分模块被设置在同一个器件中。例如，移动通信模块831可以向其它电子设备发送语音，也可以接收其它电子设备发送的语音。
调制解调处理器可以包括调制器和解调器。其中，调制器用于将待发送的低频基带信号调制成中高频信号。解调器用于将接收的电磁波信号解调为低频基带信号。随后解调器将解调得到的低频基带信号传送至基带处理器处理。低频基带信号经基带处理器处理后，被传递给应用处理器。在本申请实施例中，调制解调处理器包括本文中的RRC模块和CSS模块。应用处理器通过音频设备(不限于扬声器870A、受话器870B等)输出声音信号，或通过显示屏851显示图像或视频。在一些实施例中，调制解调处理器可以是独立的器件。在另一些实施例中，调制解调处理器可以独立于处理器810，与移动通信模块831或其他功能模块设置在同一个器件中。在本申请实施例中，应用处理器、CSS模块以及APP模块可执行如图2、图4、图6以及图8所示实施例的方法。
无线通信模块832可以提供应用在电子设备上的包括无线局域网(wireless local area networks，WLAN)(如Wi-Fi网络)、蓝牙(bluetooth，BT)、全球导航卫星系统(global navigation satellite system，GNSS)、调频(frequency modulation，FM)、近距离无线通信技术(near field communication，NFC)、红外技术(infrared，IR)等无线通信的解决方案。无线通信模块832可以是集成至少一个通信处理模块的一个或多个器件。无线通信模块832经由天线2接收电磁波信号，将电磁波信号调频以及滤波处理，将处理后的信号发送到处理器810。无线通信模块832还可以从处理器810接收待发送的信号，对其进行调频、放大，经天线2转为电磁波信号辐射出去。
在一些实施例中，电子设备的天线1和移动通信模块831耦合，天线2和无线通信模块832耦合，使得电子设备800可以通过无线通信技术与网络以及其他设备通信。所述无线通信技术可以包括全球移动通讯系统(global system for mobile communications，GSM)、通用分组无线服务(general packet radio service，GPRS)、码分多址接入(code division multiple access，CDMA)、宽带码分多址(wideband code division multiple access，WCDMA)、时分码 分多址(time-division code division multiple access，TD-SCDMA)、长期演进(long term evolution，LTE)、BT、GNSS、WLAN、NFC、FM、和/或IR技术等。所述GNSS可以包括全球卫星定位系统(global positioning system，GPS)、全球导航卫星系统(global navigation satellite system，GLONASS)、北斗卫星导航系统(beidou navigation satellite system，BDS)、准天顶卫星系统(quasi-zenith satellite system，QZSS)和/或星基增强系统(satellite based augmentation systems，SBAS)。
电子设备800可以通过音频模块840、扬声器840A、受话器840B、麦克风840C、耳机接口840D以及应用处理器等实现音频功能。例如音乐播放、录音等。
电子设备800可以通过GPU、显示屏851、以及应用处理器等实现显示功能。GPU为图像处理的微处理器，连接显示屏851和应用处理器。GPU用于执行数学和几何计算，用于图形渲染。处理器810可包括一个或多个GPU，其执行程序指令以生成或改变显示信息。
显示屏851可以用于显示图像、视频等。显示屏851可以包括显示面板。显示面板可以采用液晶显示屏(liquid crystal display，LCD)、有机发光二极管(organic light-emitting diode，OLED)、有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrix organic light emitting diode的，AMOLED)、柔性发光二极管(flex light-emitting diode，FLED)、Miniled、MicroLed、Micro-oLed、量子点发光二极管(quantum dot light emitting diodes，QLED)等。在一些实施例中，电子设备800可以包括8个或N个显示屏851，N为大于1的正整数。本发明实施例中可以通过显示屏851显示合并或分离的至少两个智能家居设备的控制界面，后文中将予以详尽描述。
电子设备800可以通过摄像头853、图像处理器、视频编解码器、显示屏851以及应用处理器等实现拍摄功能。摄像头853可以用于捕获静态图像或视频。示例性地，摄像头853可以包括镜头和图像传感器。摄像头853可以包括前置摄像头和后置摄像头。图像处理器可以为DSP，也可以为其它用于进行图像处理的器件。此外，ISP还可以在得到数字图像信号后，直接进行后期图像处理，例如对图像的噪点、亮度、色彩进行算法优化。视频编解码器用于对数字视频压缩或解压缩。电子设备800可以支持一种或多种视频编解码器。这样，电子设备800可以播放或录制多种编码格式的视频，例如：动态图像专家组(moving picture experts group，MPEG)1，MPEG2，MPEG3，MPEG4等。
按键854可以包括开机键、音量键等。按键854可以是机械按键。也可以是触摸式按键。电子设备800可以接收按键输入，产生与电子设备的用户设置以及功能控制有关的键信号输入。
指示器855可以是指示灯，可以用于指示充电状态，电量变化，也可以用于指示消息，未接来电，通知等。
马达856可以产生振动提示。马达856可以用于来电振动提示，也可以用于触摸振动反馈。例如，作用于不同应用(例如拍照，音频播放等)的触摸操作，可以对应不同的振动反馈效果。作用于显示屏851不同区域的触摸操作，马达856也可对应不同的振动反馈效果。不同的应用场景(例如：时间提醒，接收信息，闹钟，游戏等)也可以对应不同的振动反馈效果。触摸振动反馈效果还可以支持自定义。
触摸传感器860A，也可称为“触控面板”。触摸传感器860A可以设置于显示屏854，由触摸传感器860A与显示屏851组成触摸屏，也称“触控屏”。触摸传感器860A用于检测作用于其上或附近的触摸操作。触摸传感器860A可以将检测到的触摸操作传递给应用处 理器，以确定触摸事件类型。可以通过显示屏851提供与触摸操作相关的视觉输出。在另一些实施例中，触摸传感器860A也可以设置于电子设备的表面，与显示屏851所处的位置不同。
指纹传感器860B可以用于采集指纹。电子设备可以利用采集的指纹特性实现指纹解锁、访问应用锁、指纹拍照、指纹接听来电等。
在另一些实施例中，处理器810还可以包括一个或多个接口。例如，接口可以为SIM卡接口852。又例如，接口还可以为USB接口870。本申请实施例处理器810可以通过接口连接电子设备的不同模块，从而使得电子设备800能够实现不同的功能。例如拍照、处理等。需要说明的是，本申请实施例对电子设备800中接口的连接方式不作限定。
其中，SIM卡接口852可以用于连接SIM卡。SIM卡可以通过插入SIM卡接口852，或从SIM卡接口852拔出，实现和电子设备800的接触和分离。电子设备800可以支持1个或N个SIM卡接口，N为大于1的正整数。SIM卡接口852可以支持Nano SIM卡、Micro SIM卡、SIM卡等。同一个SIM卡接口852可以同时插入多张卡。所述多张卡的类型可以相同，也可以不同。SIM卡接口852也可以兼容不同类型的SIM卡。SIM卡接口852也可以兼容外部存储卡。电子设备800通过SIM卡和网络交互，实现通话以及数据通信等功能。在一些实施例中，电子设备800采用eSIM，即：嵌入式SIM卡。eSIM卡可以嵌在电子设备中，不能和电子设备800分离。
USB接口870是符合USB标准规范的接口。例如，USB接口870可以包括Mini USB接口、Micro USB接口、USB Type C接口等。USB接口870可以用于连接充电器为电子设备800充电，也可以用于电子设备800与外围设备之间传输数据。也可以用于连接耳机，通过耳机播放音频。
充电管理模块880用于从充电器接收充电输入。其中，充电器可以是无线充电器，也可以是有线充电器。在一些有线充电的实施例中，充电管理模块880可以通过USB接口870接收有线充电器的充电输入。在一些无线充电的实施例中，充电管理模块880可以通过电子设备的无线充电线圈接收无线充电输入。充电管理模块880为电池882充电的同时，还可以通过电源管理模块881为电子设备800供电。
电源管理模块881用于连接电池882，充电管理模块880与处理器810。电源管理模块881接收电池882和/或充电管理模块880的输入，为处理器810、内部存储器821、外部存储器、显示屏851、摄像头853、移动通信模块831和无线通信模块832等供电。电源管理模块884还可以用于监测电池容量、电池循环次数、电池健康状态(漏电、阻抗)等参数。在其他一些实施例中，电源管理模块881也可以设置于处理器810中。在另一些实施例中，电源管理模块881和充电管理模块880也可以设置于同一个器件中。
可以理解的是，本申请实施例示意的各模块间的接口连接关系，只是示意性说明，并不构成对电子设备800的结构限定。在本申请另一些实施例中，电子设备800也可以采用上述实施例中不同的接口连接方式，或多种接口连接方式的组合。应理解，图8所示的硬件结构仅是一个示例。本申请实施例的电子设备可以具有比图中所示出的更多的或者更少的部件，可以组合两个或更多的部件，或者可以具有不同的部件配置。图中所示出的各种部件可以在包括一个或多个信号处理和/或专用集成电路在内的硬件、软件、或硬件和软件的组合中实现。
前述的AP可以是处理器810，CSS和RRC模块为调制解调器中的子模块可执行上述 方法实施例中涉及的各步骤，所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
本实施例提供的电子设备，用于执行上述小区切换方法，因此可以达到与上述实现方法相同的效果。
本申请实施例还提供一种计算机存储介质，该计算机存储介质中存储有计算机指令，当该计算机指令在电子设备上运行时，使得电子设备执行上述相关方法步骤实现上述实施例中的小区切换方法。
本申请实施例还提供了一种计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行上述相关步骤，以实现上述实施例中的小区切换方法。
另外，本申请的实施例还提供一种装置，这个装置具体可以是芯片，组件或模块，该装置可包括相连的处理器和存储器；其中，存储器用于存储计算机执行指令，当装置运行时，处理器可执行存储器存储的计算机执行指令，以使芯片执行上述各方法实施例中的图像小区切换方法。
其中，本实施例提供的电子设备、计算机存储介质、计算机程序产品或芯片均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果，此处不再赘述。
应理解，本申请实施例中的术语“系统”和“网络”可被互换使用。“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，a和b，a和c，b和c，或a、b和c，其中a，b，c可以是单个，也可以是多个。
以及，除非有相反的说明，本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的顺序、时序、优先级或者重要程度。例如，第一小区切换列表和第二小区切换列表，只是为了区分不同的小区切换列表，而并不是表示这两种信息的优先级、或者重要程度等的不同。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
另外，在本申请实施例中，“示例性的”一词用于表示例子或说明。本申请实施例汇总被描述为“示例”的任何实施例或实现方案不应被解释为比其他实施例或实现方案更优选。也就是，使用“示例”一词旨在以具体方式呈现概念。
通过以上实施方式的描述，所属领域的技术人员可以了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
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，模块或单元的划分，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装置，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。
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一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。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。
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，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例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个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例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(read only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上内容，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (20)

  1. 一种小区切换方法，其特征在于，包括：
    终端设备的第一模块向所述终端设备的第二模块发送第一请求消息，所述第一请求消息用于请求与第一跟踪区域码TAC对应的第一小区切换列表，所述第一TAC为所述终端设备当前小区的TAC；
    所述第一模块从所述第二模块获取第一信息，所述第一信息用于指示所述第一小区切换列表；
    所述第一模块根据所述第一小区切换列表辅助小区切换。
  2. 如权利要求1所述的方法，其特征在于，所述第一请求消息包含所述第一TAC，所述第一TAC对应第一线路，所述第一小区切换列表为所述第一线路对应的小区切换列表。
  3. 如权利要求2所述的方法，其特征在于，所述第一请求消息还包含第一小区标识，所述第一线路为对应所述第一TAC和所述第一小区标识的线路。
  4. 如权利要求1所述的方法，其特征在于，在所述终端设备的第一模块向所述终端设备的第二模块发送第一请求消息之前，所述方法还包括：
    所述第一模块从所述第二模块接收TAC列表，所述TAC列表中包含TAC与线路的对应关系；
    所述第一模块基于所述TAC列表确定与所述第一TAC对应的第一线路；
    所述终端设备的第一模块向所述终端设备的第二模块发送第一请求消息，包括：所述第一模块向所述第二模块发送携带所述第一线路的所述第一请求消息。
  5. 如权利要求2或4所述的方法，其特征在于，在所述第一模块从所述第二模块获取第一信息之后，所述方法还包括：
    所述第一模块判断所述第一线路中是否包含所述第一小区标识对应的线路；
    在不包含所述第一小区标识对应的线路的情况下，重新向所述第二模块发送所述第一请求消息。
  6. 如权利要求1-5任一所述的方法，其特征在于，所述第一小区切换列表包括：所述第一线路上的小区的小区标识、以及与每个小区使用的频点信息。
  7. 如权利要求6所述的方法，其特征在于，所述第一模块根据所述第一小区切换列表辅助小区切换，包括：
    所述第一模块基于所述第一小区切换列表确定当前频点之后的频点；
    所述第一模块对所述当前频点之后的频点对应的小区进行测量，并向网络设备上报测量结果。
  8. 如权利要求1-7任一所述的方法，其特征在于，所述第一信息中还包括：第二线路对应的第二小区切换列表，所述第二线路与所述第一线路不同，且所述第二线路为所述第一线路的行进方向上的线路。
  9. 如权利要求8所述方法，其特征在于，所述第一模块从所述第二模块获取第一信息之前，所述方法还包括：
    所述第二模块确定所述第一小区切换列表包含的数据量；
    所述第二模块在所述数据量大于或等于数据量阈值时，向所述第一模块传递所述第一小区切换列表；
    所述第二模块在所述数据量小于所述数据量阈值时，向所述第一模块传递所述第一小区切换列表和所述第二小区切换列表。
  10. 如权利要求8所述的方法，其特征在于，在所述第一模块根据所述第一小区切换列表辅助小区切换之后，所述方法还包括：
    所述第一模块根据所述第二小区切换列表辅助小区切换。
  11. 如权利要求1-10任一所述的方法，其特征在于，所述终端设备的第一模块向所述终端设备的第二模块发送第一请求消息，包括：
    所述第一模块在确定所述终端设备处于预设模块或者所述终端设备的移动速度大于预设阈值的情况下向所述第二模块发送所述第一请求消息。
  12. 如权利要求1-11任一所述的方法，其特征在于，所述第一模块为调制解调器，所述第二模块为应用处理器。
  13. 一种小区切换方法，其特征在于，包括：
    终端设备的第一模块向所述终端设备的第二模块发送携带第一小区标识的第一请求消息，所述第一请求消息用于请求与所述第一小区标识对应的第一小区切换列表，所述第一小区标识为所述终端设备当前小区的标识；
    所述第一模块从所述第二模块获取第一信息，所述第一信息用于指示所述第一小区切换列表；
    所述第一模块根据所述第一小区切换列表辅助小区切换。
  14. 如权利要求13所述的方法，其特征在于，所述第一小区标识对应第一线路，所述第一小区切换列表为所述第一线路对应的小区切换列表。
  15. 如权利要求13或14所述的方法，其特征在于，所述第一信息中还包括：第二线路对应的第二小区切换列表，所述第二线路与所述第一线路不同，且所述第二线路为所述第一线路的行进方向上的线路。
  16. 如权利要求13-15任一所述的方法，其特征在于，所述第一模块为调制解调器，所述第二模块为应用处理器。
  17. 一种通信装置，其特征在于，所述通信装置包括处理器和调制解调器，以及存储器，所述存储器用于存储计算机程序，所述处理器用于执行存储在所述存储器上的计算机程序，使得所述装置执行如权利要求1～16中任一项所述的方法。
  18. 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存储有计算机程序，所述计算机程序当被计算机执行时，使所述计算机执行如权利要求1～16中任意一项所述的方法。
  19. 一种通信装置，其特征在于，所述芯片包括至少一个处理器、接口电路和存储器，所述存储器、所述接口电路和所述至少一个处理器通过线路互联，所述存储器中存储有计算机程序，所述计算机程序被所述至少一个处理器执行时，所述芯片实现权利要求1-12任一项所述的方法或权利要求13-16任一项所述的方法。
  20. 一种计算机程序产品，其特征在于，当该计算机程序产品在电子设备上运行时，使得该电子设备执行如权利要求1-12任一项所述的方法或权利要求13-16任一项所述的方法。
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