WO2023193380A1 - 小区重选方法及装置 - Google Patents

小区重选方法及装置 Download PDF

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Publication number
WO2023193380A1
WO2023193380A1 PCT/CN2022/110456 CN2022110456W WO2023193380A1 WO 2023193380 A1 WO2023193380 A1 WO 2023193380A1 CN 2022110456 W CN2022110456 W CN 2022110456W WO 2023193380 A1 WO2023193380 A1 WO 2023193380A1
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WIPO (PCT)
Prior art keywords
frequency point
point information
terminal
priori
priori frequency
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PCT/CN2022/110456
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English (en)
French (fr)
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WO2023193380A8 (zh
WO2023193380A9 (zh
Inventor
魏珍荣
何彦召
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荣耀终端有限公司
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Priority to EP22899615.3A priority Critical patent/EP4280688A1/en
Publication of WO2023193380A1 publication Critical patent/WO2023193380A1/zh
Publication of WO2023193380A9 publication Critical patent/WO2023193380A9/zh
Publication of WO2023193380A8 publication Critical patent/WO2023193380A8/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • 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
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
    • H04J11/0093—Neighbour cell search
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communication technology, and in particular, to a cell reselection method and device.
  • cell reselection can be understood as when multiple cells coexist, the terminal selects a cell and switches from the current cell to the selected cell. Furthermore, the terminal can perform services in the accessed cell. However, it is possible that the terminal cannot access a better cell due to network configuration and other reasons. It can be seen that the cell reselection of the terminal needs to be improved.
  • This application provides a cell reselection method and device, aiming to improve the possibility of terminal reselection to a cell with better signal.
  • this application provides a cell reselection method.
  • the method includes: the terminal selects at least one target a priori frequency point information from multiple a priori frequency point information; and performs measurement and reselection evaluation based on the target a priori frequency point information. ; Carry out cell reselection based on the results of the reselection evaluation.
  • the target a priori frequency point information may be a priori frequency point information selected by the terminal from multiple a priori frequency point information.
  • the terminal can actively add target a priori frequency point information, and use the added target a priori frequency point information in the cell reselection process. For example, searching for cells under the target a priori frequency point information increases the number of cells that can be reselected and improves the possibility of the terminal reselecting to a cell with a better signal.
  • the target a priori frequency point information is added to the neighbor cell configuration, which contains the neighbor cell frequency point information configured by the network device; measurement and reselection evaluation are performed based on the target a priori frequency point information. It includes: measuring according to the neighboring cell frequency point in the neighboring cell frequency point information, obtaining the first measurement result, and performing reselection evaluation on the first measurement result according to the neighboring cell reselection configuration in the neighboring cell frequency point information; according to the target priori The a priori frequency point in the frequency point information is measured to obtain a second measurement result, and the second measurement result is reselected and evaluated according to the a priori reselection configuration in the target a priori frequency point.
  • the terminal can also use the neighboring cell frequency point information configured by network equipment (such as base stations) to search for cells, so as to use the target a priori frequency point information and neighboring cell frequency point information to conduct cell search. Reselection, so that the terminal can actively add target a priori frequency point information, and can also reuse the cell reselection process of neighboring cell frequency point information, while increasing the number of reselectable cells and improving reselection to the one with better signal The cell reselection process is reused while maintaining the possibility of re-using the cell.
  • network equipment such as base stations
  • the terminal uses the neighboring cell frequency point information and the target a priori frequency point information to perform cell reselection
  • the terminal uses the neighboring cell frequency point in the neighboring cell frequency point information to perform measurements and uses the neighboring cell frequency point information in the neighboring cell frequency point information to perform cell reselection.
  • Configuration for reselection evaluation the terminal uses the a priori frequency points in the target a priori frequency point information for measurement and uses the a priori reselection configuration in the target a priori frequency point information for reselection evaluation, so as to realize the use of respective methods for different types of frequency points.
  • Matching reselection configurations are used for reselection evaluation to improve the accuracy of reselection evaluation.
  • the terminal can reuse the reselection configuration (corresponding to the a priori reselection configuration) used before the target a priori frequency point information, eliminating the need to pre-prepare the a priori reselection of the target a priori frequency point information. configuration process.
  • the terminal selects at least one target a priori frequency point information from a plurality of a priori frequency point information including: selecting at least one target a priori frequency point information from a plurality of a priori frequency point information according to the usage scenario of the terminal.
  • Verification frequency point information enables the selection of different a priori frequency point information according to different usage scenarios to adapt to the needs of the current usage scenario of the terminal.
  • selecting at least one target a priori frequency point information from multiple a priori frequency point information according to the usage scenario of the terminal includes: selecting from the multiple a priori frequency point information according to the usage scenario of the terminal. Select the target prior frequency point information in the same area as the area where the terminal is located.
  • the region can be a region, and the scope of the region can be city level.
  • the area can also be a fence within the area where the terminal is positioned.
  • the target a priori frequency point information selected by the terminal is the a priori frequency point information in the same area as the area where the terminal is located, so that the terminal can improve the coverage of the target a priori frequency point information within the signal coverage. selection success rate.
  • the terminal's judgment on the usage scenario may be determined based on the public land mobile network currently registered by the terminal. For example, the terminal may pre-prepare the usage scenario of the public land mobile network in advance, such as pre-prepare the corresponding relationship between the public land mobile network and the usage scenario in advance. When the terminal is registered to a public land mobile network, the terminal can determine the usage scenario of the currently registered public land mobile network based on the pre-prepared correspondence relationship.
  • selecting target a priori frequency point information whose area is the same as the area where the terminal is located from multiple a priori frequency point information includes: determining that the usage scenario of the terminal is the first usage scenario. Scenario, in the first usage scenario, the terminal is registered in the first public land mobile network and the terminal is in the first area; select from multiple a priori frequency point information and the first public land mobile network belongs to the same operator and the area is The target prior frequency point in the first region.
  • the first usage scenario may be a single operator scenario, and the single operator scenario may mean that the first public land mobile network belongs to a single operator, for example, the first public land mobile network belongs to operator A.
  • the target a priori frequency point information selected by the terminal meets the conditions (which can also be called requirements): it belongs to the same operator as the first public land mobile network, and the area is the first area.
  • the first public land mobile network belongs to operator A and the terminal is in area 1.
  • the terminal can select the target a priori frequency point information under the public land mobile network of operator A and the area is area 1.
  • the terminal may select target a priori frequency point information in area 1 under the first public land mobile network.
  • selecting target a priori frequency point information whose area is the same as the area where the terminal is located from multiple a priori frequency point information includes: determining that the usage scenario of the terminal is the second usage Scenario, in the second usage scenario, the terminal is registered in the second public land mobile network and the terminal is in the second area; select target a priori frequency point information that satisfies the first condition and satisfies the second condition from multiple a priori frequency point information.
  • the target a priori frequency point information of the conditions.
  • the first condition is that the second public land mobile network belongs to the same operator and the area is the second area.
  • the second condition is that the operator of the second public land mobile network builds and shares a public The land mobile network area is the second area.
  • the second usage scenario may be an operator co-construction and sharing scenario.
  • the operator co-construction and sharing scenario means that the public land mobile network can be shared by at least two operators, that is, a public land mobile network belongs to at least two operators, for example
  • the second public land mobile network belongs to operator A and operator B.
  • the terminal may select the target a priori frequency point information with reference to the first condition and the second condition.
  • the first condition can be called the first requirement
  • the second condition can be called the second requirement.
  • selecting target a priori frequency point information whose area is the same as the area where the terminal is located from multiple a priori frequency point information includes: determining that the usage scenario of the terminal is the third usage Scenario, in the third usage scenario, the terminal is registered in the third public land mobile network and the terminal is in the third area; select target a priori frequency point information that satisfies the third condition and satisfies the fourth condition from multiple a priori frequency point information.
  • the target a priori frequency point information of the conditions.
  • the third condition is that it belongs to the same operator as the third public land mobile network and the area is the third area.
  • the fourth condition is the public land mobile network that roams from the third public land mobile network. , area is the third area.
  • the third usage scenario can be the roaming scenario of different operator networks.
  • the roaming scenario of different operator networks can refer to roaming from the public land mobile network of one operator to the public land mobile network of another operator. Two public land mobile networks can roam together.
  • the network standards corresponding to the mobile network can be different. For example, you can roam from a public land mobile network of operator A to a public land mobile network of operator B.
  • the terminal may select the target a priori frequency point information with reference to the third condition and the fourth condition.
  • the third condition can be called the first requirement
  • the fourth condition can be called the second requirement.
  • selecting target a priori frequency point information whose area is the same as the area where the terminal is located from multiple a priori frequency point information includes: determining that the usage scenario of the terminal is the fourth usage Scenario, in the fourth usage scenario, the terminal is registered in the fourth public land mobile network and the terminal is in the fourth area; select target a priori frequency point information that satisfies the fifth condition and satisfies the sixth condition from multiple a priori frequency point information.
  • the fifth condition is that it belongs to the same operator as the fourth public land mobile network and the area is the fourth area.
  • the sixth condition is the fourth area.
  • the public land mobile network and area jointly built and shared by the operators of the public land mobile network are the fourth area.
  • the seventh condition is that the public land mobile network and area to which roaming from the fourth public land mobile network is the fourth area.
  • the fourth usage scenario may be to support co-construction and sharing and roaming in different networks.
  • the terminal may select the target a priori frequency point information with reference to the fifth condition, the sixth condition and the seventh condition.
  • the fifth condition corresponds to the first condition or the third condition
  • the sixth condition corresponds to the second condition
  • the seventh condition corresponds to the fourth condition.
  • the network standard of the target a priori frequency point information selected by the terminal may be the same as the current network standard of the terminal, or it may be a different network Standard.
  • the terminal can select all target a priori frequency points that meet the conditions, or select part of the a priori frequency point information that meets the conditions. If it selects part of the target a priori frequency point information that meets the conditions, the terminal can select according to the priority of the a priori frequency point information. , such as selecting the target a priori frequency point information with high priority.
  • the priority of the first condition is higher than the priority of the second condition.
  • the terminal can first select the target a priori frequency point information based on the first condition, and then select the target a priori frequency point based on the second condition. information. Under the same conditions, the terminal can select target a priori frequency point information according to priority. Because the target a priori frequency information with a higher priority has higher signal quality and a higher probability of successful reselection, selecting the target a priori frequency information according to the priority can improve the terminal's record of reselecting to a cell with good signal quality. And improve the reelection success record.
  • the terminal can select part of the target a priori frequency point information according to the first condition, and select part of the target a priori frequency point information according to the second condition, so that the terminal can select different types of target a priori frequency point information, and achieve both the target and the a priori frequency point information.
  • the first condition and the second condition enable the target prior frequency point information to be diversified.
  • the priority of the third condition is higher than the priority of the fourth condition.
  • the terminal can select the target a priori frequency point information by referring to the description of the above second usage scenario.
  • the priority of the fifth condition is higher than the priority of the sixth condition, and the priority of the sixth condition is higher than the priority of the seventh condition.
  • the terminal can refer to the description of the second usage scenario above to select the target prior. Frequency information.
  • the terminal selects at least one target a priori frequency point information from a plurality of a priori frequency point information including: selecting from the multiple a priori frequency point information according to the priority of the a priori frequency point information. At least one target has prior frequency point information. Because the target a priori frequency information with a higher priority has higher signal quality and a higher probability of successful reselection, selecting the target a priori frequency information according to the priority can improve the terminal's record of reselecting to a cell with good signal quality. And improve the reelection success record.
  • the number of frequency point information in the neighboring cell configuration is less than or equal to the preset number.
  • the preset number may be the maximum number of frequency point information in neighboring cell configurations to limit the total number of frequency point information in neighboring cell configurations, thereby increasing the number of cell reselections and shortening the time consuming of cell reselections.
  • the terminal selecting at least one target a priori frequency point information from multiple a priori frequency point information includes: when the terminal determines that the preset conditions are met, selecting at least one target a priori frequency point information from the multiple a priori frequency point information.
  • a target a priori frequency point information includes a first preset condition and/or a second preset condition; the first preset condition is that the number of neighboring cell frequency point information configured by the network device in the neighboring cell configuration is less than the quantity threshold , or there is no neighboring cell frequency information in the neighboring cell configuration; the second preset condition is that the signal quality of the currently accessed cell is less than the first threshold, and there is no handover to a cell with a signal quality greater than the second threshold within the preset time. One threshold is less than the second threshold.
  • the second preset condition indicates that the signal quality of the cell currently accessed by the terminal is poor, and the terminal has not switched to a cell with better signal quality within the preset time.
  • the terminal controls the use of the a priori frequency point information through the first preset condition and/or the second preset condition to reduce the terminal's use/reliance on the a priori frequency point information as much as possible.
  • the method further includes: obtaining a priori frequency point information of each frequency point based on relevant information of multiple frequency points where the terminal successfully resides.
  • the relevant information of the frequency point may include: the public land mobile network to which the frequency point belongs, the value of the frequency point, the area where the frequency point is located, the network standard corresponding to the frequency point, the reselection configuration of the frequency point, the number of times the frequency point is used, and the reselection configuration.
  • the number of uses, etc., the terminal can obtain the a priori frequency point information of each frequency point through statistical methods.
  • the a priori frequency point information of a frequency point may include a priori frequency point and a reselection configuration.
  • the reselection configuration is used to indicate the reselection decision criteria.
  • the reselection configuration at least includes: reselection priority, high and low priority reselection thresholds and Reset timers, etc.
  • the a priori frequency point information distinguishes countries, operators, network standards and regions, thereby distinguishing the a priori frequency point information by countries, operators, network standards and regions, where the country and operator can be represented by the public land mobile network.
  • the terminal can obtain it based on the number of times the frequency point is used and the number of uses of the reselection configuration. For example, the one with the largest usage ratio is determined as the a priori frequency point information. The greater the usage ratio, the greater the probability that the a priori frequency point information is used.
  • the signal quality of the cell reselected based on the a priori frequency point in the a priori frequency point information and the a priori reselection configuration is better. Therefore, if the a priori frequency point information is used, the signal quality is better.
  • the frequency point information is stored in the data table. The greater the usage ratio, the higher the ranking of the a priori frequency point information. When the terminal performs cell reselection, the a priori frequency point information with the highest ranking can be prioritized.
  • the a priori frequency point information can be stored locally in the terminal or in the server.
  • this application provides a terminal.
  • the terminal includes: a processor and a memory; wherein the memory is used to store one or more computer program codes.
  • the computer program codes include computer instructions.
  • the processor executes the computer instructions, the processor Perform the above cell reselection method.
  • the present application provides a computer storage medium.
  • the computer storage medium includes computer instructions. When the computer instructions are run on the terminal, the terminal is caused to perform the above-mentioned cell reselection method.
  • Figure 1 is a schematic diagram of the neighbor relationship of multiple cells provided by this application.
  • Figure 2 is a flow chart of a communication method provided by this application.
  • FIG. 3 is a flow chart of another communication method provided by this application.
  • FIG. 4 is a hardware structure diagram of the terminal provided by this application.
  • FIG. 5 is a software architecture diagram of the terminal provided by this application.
  • one or more refers to one, two or more than two; "and/or” describes the association relationship of associated objects, indicating that three relationships can exist; for example, A and/or B can mean: A alone exists, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural.
  • the character "/" generally indicates that the related objects are in an "or” relationship.
  • a wireless communication system can be understood as including terminals and network equipment.
  • the terminal can also be called terminal equipment (Terminal Equipment), user equipment (User Equipment), mobile station (Mobi1e Station, MS), and mobile terminal (Mobi1e Termina1), etc.
  • the network equipment includes at least one of a radio access network equipment and a core network equipment.
  • An example of a radio access network equipment is a base station, and an example of a core network equipment is a mobility management entity (Mobility Management Entity, MME).
  • MME Mobility Management Entity
  • Wireless communication systems include but are not limited to: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) System, Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System, UMTS), and Fifth Generation Mobile Communication Systems (5G).
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • Universal Mobile Telecommunication System Universal Mobile Telecommunication System
  • UMTS Universal Mobile Telecommunication System
  • 5G Fifth Generation Mobile Communication Systems
  • the GSM system can also be called the second generation communication system, or 2G.
  • the CDMA system and the WCDMA system can also be called the third generation communication system, that is, 3G.
  • LTE system, LTE TDD system, etc. can also be called the 4th generation communication system, that is, 4G.
  • Network sharing can be understood as different operators sharing the radio resources of the network, that is, multiple operators sharing the radio access network.
  • Cell Reselection refers to the cell reselection completed by the terminal in the IDLE state.
  • the terminal selects the best cell to provide service signals by monitoring the signal quality of neighboring cells and the signal quality of the current cell.
  • Later generation standards and previous generation standards According to the development of network standards, the sequence is obtained: 2G, 3G, 4G, 5G.
  • the later generation standards and the previous generation standards are relative to any two standards among all network standards in the sequence.
  • This sequence The standard in the middle is the predecessor standard of the later standard, and the later standard is the descendant standard of the earlier standard.
  • 5G is the descendant standard of 2G, 3G and 4G
  • 3G is the descendant standard of 2G
  • 3G is the descendant standard of 2G.
  • 3G is the descendant standard of 2G.
  • 3G is the descendant standard of 2G.
  • the a priori frequency point is also called the historical frequency point.
  • the a priori frequency point can be understood as the frequency point where the terminal successfully resides. After the terminal successfully camps in a cell of a certain frequency point, it uses this frequency point as a priori frequency point.
  • a cell can have multiple frequency points, and different cells can have the same frequency point.
  • Figure 1 shows an example of wireless network configuration in a network sharing scenario:
  • cell 1 is a cell of operator A's 5G standalone (SA) network
  • cell 2 is a cell of operator A's LTE network (also called a 4G network).
  • Cell 2 is the anchor cell of the 5G network, but the signal strength is around -95dB. Although it is displayed as a 5G network on the terminal, the network rate experienced by users in this cell is poor.
  • Cell 3 is the cell of Operator B's LTE network. Assume that the signal strength of cell 3 is around -80dB, and it is not an anchor cell. It is displayed as a 4G network on the terminal, and users experience better network speeds in this cell.
  • Cell 1 and cell 2 are configured with neighbor cell relationships in advance.
  • Cell 3 and Cell 1 are pre-configured with a one-way neighbor relationship.
  • the one-way neighbor relationship allows the terminal to reselect from Cell 3 to Cell 1, but the terminal cannot reselect from Cell 1 to Cell 3.
  • the terminal cannot reselect from cell 2 to cell 3, nor from cell 3 to cell 2.
  • the terminal as a mobile phone as an example, assume that the mobile phone stays in Cell 1 after being powered on and establishes an RRC connection with Cell 1, or that the mobile phone moves to Cell 1 and then establishes an RRC connection with Cell 1, that is, the mobile phone is in Cell 1 of the 5G network. Assuming that the signal in cell 1 is not good, for example, the current signal strength is around -115dB, the terminal can initiate a cell reselection process.
  • cell 2 has a neighbor relationship with cell 1
  • cell 3 has a one-way neighbor relationship with cell 1
  • the mobile phone can reselect from cell 1 to cell 2, but cannot reselect from cell 1 to cell 3. Therefore, although the signal quality of cell 3 is better than that of cell 2, the mobile phone cannot reselect from cell 1 to cell 3 because of the one-way neighbor relationship between cell 3 and cell 1.
  • the cell reselection method provided by the embodiments of the present application aims to improve the possibility of the terminal reselecting to a cell with a better signal.
  • the cell reselection method provided by the embodiment of the present application is applicable to but not limited to the scenario shown in Figure 1:
  • cell 1, cell 2, and cell 3 shown in Figure 1 can all be operators A's cells. In this case, even if cell 1 and cell 3 are pre-configured with neighbor cell relationships, the method provided by the embodiment of the present application can be used to reselect the cells.
  • the three cells can also be 5G network cells or all 4G network cells.
  • the 5G SA network shown in Figure 1 can be replaced by a 5G Non-Standalone (NSA) network.
  • NSA 5G Non-Standalone
  • 5G network and 4G network shown in Figure 1 it can also be used in 2G or 3G networks, such as reselection from a cell in the 3G network to a cell in the 2G network.
  • a network from a previous generation standard to a network of a later generation standard such as reselecting from a cell of a 4G network to a cell of a 5G network.
  • reselecting from a cell of a 4G network to a cell of a 5G network Another example is reselection from a cell on a 3G network to a cell on a 4G or 5G network.
  • the cell reselection method provided by the embodiment of the present application can add a priori frequency point information to the neighboring cell configuration of the terminal.
  • the neighboring cell configuration includes the neighboring cell frequency point information configured by the network (such as the neighboring cell frequency point information configured by the base station). and a priori frequency point information, measure and reselect the neighboring cell frequency information and a priori frequency point information, and complete cell reselection. Because a priori frequency information is added to the neighboring cell configuration, cells are searched under the a priori frequency information, thereby increasing the number of cells that can be reselected and improving the possibility of the terminal reselecting to a cell with a better signal.
  • the a priori frequency point information can be selected by the terminal from the a priori frequency point database, and then the a priori frequency point information is added to the neighboring cell configuration.
  • the a priori frequency point information in the a priori frequency point database can be obtained by the terminal based on big data statistics.
  • the big data records relevant information of a certain frequency point where the terminal successfully resides.
  • Relevant information is obtained to obtain a priori frequency point information for each frequency point.
  • the a priori frequency point information includes the a priori frequency point and the reselection configuration.
  • the reselection configuration is used to indicate the reselection decision criteria.
  • the reselection configuration at least includes: reselection priority, high and low priority reselection thresholds and reselection timer. wait.
  • the a priori frequency point information distinguishes countries, operators, network standards and regions, so that the a priori frequency point information can be distinguished by countries, operators, network standards and regions.
  • the countries and operators can use the Public Land Mobile Network (Public Land Mobile Network) to distinguish the a priori frequency point information.
  • Land Mobile Network Land Mobile Network
  • the prior frequency point database can record the prior frequency point information in the form of a data table, as shown in Table 1.
  • Table 1 A priori frequency point table
  • Each row in Table 1 records a piece of a priori frequency point information.
  • a priori frequency point Freq1 is preset on the 4G network standard of operator 1 (PLMN1 in Table 1). This a priori frequency point Freq1 is only valid in area Area1.
  • the a priori frequency point Freq1 has a priori reselection configuration Config1.
  • the scope of the region can be at the city level, or it can be a fence within a region where the terminal is located.
  • the a priori frequency points in a region and the a priori reselection configuration under the a priori frequency points can be obtained through statistical methods of big data.
  • the terminal can count the usage ratio of each frequency point in the area, and select at least one frequency point based on the usage ratio of each frequency point in the area.
  • the frequency point is used as the prior frequency point in this area.
  • the terminal can choose to use a frequency point with a proportion greater than the preset proportion as the a priori frequency point of the area.
  • the terminal can choose to use a frequency point with a larger proportion as the a priori frequency point of the area, where each frequency point in the area
  • the usage ratio of a point the number of times this frequency point is used in this area/the total number of times all frequency points are used in this area.
  • the terminal can count the usage ratio of each reselection configuration under the frequency point. According to each reselection configuration under the frequency point, According to the usage ratio, at least one reselection configuration is selected as the a priori reselection configuration of the frequency point. For example, the terminal may choose to use a reselection configuration with a proportion greater than the preset proportion as the a priori reselection configuration for the frequency point.
  • the terminal may choose to use a reselection configuration with a larger proportion as the a priori reselection configuration for the frequency point, where
  • the usage ratio of each reselection configuration under this frequency point the number of uses of this reselection configuration at this frequency point / the total number of uses of all reselection configurations at this frequency point.
  • the sorting of each piece of a priori frequency information in Table 1 can be a random arrangement or a statistical sorting, such as counting the usage ratio of the a priori frequency information.
  • the larger the usage ratio the greater the probability that the a priori frequency information is used. If the cell is reselected based on the a priori frequency information and the a priori reselection configuration, the signal quality is better. Therefore, the larger the usage ratio, the higher the ranking of the a priori frequency information.
  • the usage ratio of a priori frequency point information the number of uses of a priori reselection configuration/the total number of uses of all a priori reselection configurations.
  • the a priori frequency point information can be stored locally on the terminal or on the server, and the server can be in the cloud.
  • the server can actively or passively send a priori frequency point information to the terminal.
  • the server can send a priori frequency point information to the terminal in the following manner:
  • the server can send the a priori frequency point information to the terminal after updating it; 2) The server regularly sends the a priori frequency point information to the terminal; 3) The terminal can send an acquisition request to the server, and the server responds to the acquisition request and sends the a priori frequency point information to the terminal. Frequency information.
  • the a priori frequency point information sent by the server may be updated a priori frequency point information, that is, a priori frequency point information that is present in the server but not in the terminal.
  • the terminal selects a priori frequency point information from multiple a priori frequency point information, and adds the selected a priori frequency point information to the neighboring cell configuration.
  • the terminal selects a priori frequency point information when preset conditions are met, where the preset conditions include at least one of the following 1, 2, and 3:
  • the number of neighboring cell frequency point information configured by the network in the neighboring cell configuration is less than the quantity threshold, or there is no neighboring cell frequency point information.
  • the quantity threshold can be pre-configured, for example, the quantity threshold is 2.
  • the neighboring cell frequency point information configured by the network can be the neighboring cell frequency point information configured by the access network equipment (such as a base station). If the number of neighboring cell frequency point information is small, the range of cells that the terminal can select during the cell reselection process is small, the signal of the cell reselected by the terminal based on the neighboring cell frequency information is poor, such as cell 2 as shown in Figure 1. Therefore, the terminal can use the number of neighboring cell frequency information in the neighboring cell configuration as a preset condition to The triggering terminal can add a priori frequency point information to the neighboring cell configuration.
  • the signal quality of the cell currently accessed by the terminal is poor, and the terminal does not switch to a cell with better signal quality within the preset time.
  • the preset time can be configured in advance, and this embodiment does not limit the value of the preset time.
  • the terminal switches from one cell to another cell, it switches back to the previous cell.
  • the terminal reselects from cell 1 of the 5G network to cell 2 of the 4G network, because the signal in cell 2 is poor, but it cannot reselect from cell 1 or cell 2 to cell 3, the terminal reselects from cell 1 or cell 2 to cell 3.
  • Cell 2 of the network returns to Cell 1 of the 5G network.
  • the terminal still resides in cell 1 after multiple reselections, indicating that the terminal has not switched to a cell with better signal quality within the preset time.
  • the terminal accesses a cell, although the signal quality of the cell is poor, there is no other cell to switch to within the preset time, so that the terminal still resides in the cell within the preset time.
  • the signal quality of the cell currently accessed by the terminal is poor, and the terminal does not switch to a cell with better signal quality within the preset time.
  • the number of neighboring cell frequency point information configured by the network in the neighboring cell configuration is less than the quantity threshold or there is no neighboring cell frequency point information.
  • S102 Perform measurement and reselection evaluation based on the neighbor cell frequency information configured by the network and the added a priori frequency information. If the neighboring cell frequency information in the neighboring cell configuration is empty (that is, there is no neighboring cell frequency information in the neighboring cell configuration), the terminal can perform measurement and reselection evaluation based on the added a priori frequency point information. If the neighbor cell configuration includes neighbor cell frequency point information and a priori frequency point information, the terminal can simultaneously use the neighbor cell frequency point in the neighbor cell frequency point information and the a priori frequency point in the a priori frequency point information to perform measurements.
  • the terminal can use the neighboring cell reselection configuration in the neighboring cell frequency information to perform reselection evaluation; for a priori frequency points, the terminal can use the priori information in the a priori frequency point information.
  • the reselection configuration is evaluated for reselection.
  • the terminal may not send a reselection feedback message to the access network device; if the identifier of the reselected cell is different from that of the previously accessed cell, the terminal may A reselection feedback message is sent to the access network device.
  • the reselection feedback message may carry the identifier of the reselection cell to notify the access network device of the cell currently accessed by the terminal.
  • the terminal can add a priori frequency point information to the terminal's neighbor cell configuration.
  • the neighbor cell configuration includes the neighbor cell frequency point information configured by the network (such as the neighbor cell frequency point information configured by the base station) and the a priori cell frequency point information.
  • Frequency information measure and reselect the neighboring cell frequency information and a priori frequency information to complete cell reselection. Because a priori frequency information is added to the neighboring cell configuration, cells are searched under the a priori frequency information, thereby increasing the number of cells that can be reselected and improving the possibility of the terminal reselecting to a cell with a better signal.
  • the terminal can add a priori frequency point information according to the usage scenario.
  • the corresponding flow chart is shown in Figure 3.
  • Figure 3 shows the process of another cell reselection method, which can include the following steps:
  • the signal quality of the cell currently accessed by the terminal is poor, and the terminal does not switch to a cell with better signal quality within the preset time.
  • the number of neighboring cell frequency point information configured by the network is less than the quantity threshold or there is no neighboring cell frequency point information. It can be seen from steps S201 and S202 that the preset conditions that trigger the terminal to select a priori frequency point information are: the signal quality of the cell currently accessed by the terminal is poor, it does not switch to a cell with better signal quality within the preset time, and the neighboring cell The number of neighboring cell frequency point information configured by the network in the zone configuration is less than the quantity threshold or there is no neighboring cell frequency point information.
  • Usage scenarios include: single operator scenarios, operator co-construction and sharing scenarios, and operator inter-network roaming scenarios.
  • the single-operator scenario means that the PLMN belongs to a single operator;
  • the operator co-construction and sharing scenario means that the PLMN can be shared by at least two operators, that is, one PLMN belongs to at least two operators;
  • the operator-different network roaming scenario means that from One operator's PLMN can roam to another operator's PLMN, and the two PLMNs can correspond to different network standards.
  • the terminal can pre-prepare the usage scenario to which the PLMN belongs, such as the correspondence between the PLMN and the usage scenario in advance.
  • the terminal can determine the usage scenario of the currently registered PLMN based on the pre-prepared correspondence relationship.
  • the terminal is registered under PLMN1, the frequency point of the currently accessed cell is Freq0, and PLMN1 belongs to a single operator, then if the signal quality of frequency point Freq0 is poor and the terminal does not switch to the signal within a period of time In a cell with good quality, the access network equipment in Area1 is only configured with the 4G neighbor frequency point Freq1. Then the terminal can combine the a priori frequency point Freq1 and the 5G network under the 4G network standard belonging to PLMN1 and area Area1 in Table 1. The a priori frequency point Freq3 under the standard is added to the neighboring cell configuration.
  • the a priori frequency point information selected by the terminal meets the requirements.
  • the requirement is that the a priori frequency point information in the PLMN region belonging to the operator is the same as the region where the terminal is currently located.
  • the a priori frequency point information The network standard of the point information can be the same as the current network standard of the terminal, or it can be a different network standard.
  • the terminal can select according to the priority of the a priori frequency point information that meets the requirement, such as selecting a priori frequency point information with a high priority.
  • the priority of the a priori frequency point information is represented by the ranking of the a priori frequency point information in Table 1. The higher the priority, the higher the priority, and the lower the priority, the lower the priority.
  • step S206 Determine whether the usage scenario is a shared scenario co-constructed by an operator. If yes, perform step S207. If not, perform step S208.
  • the terminal can select two types of a priori frequency point information based on the region. One is that it belongs to the same operator as the PLMN currently registered by the terminal, and the region is the same as the region where the current terminal is located.
  • the a priori frequency point information; the other is the a priori frequency point information co-constructed and shared by the operator of the PLMN to which the terminal is currently registered, and the region is the same as the region where the current terminal is located.
  • the a priori frequency point information that the terminal can add to the neighbor cell configuration includes: Table 1
  • the a priori frequency point Freq1 under the 4G network standard belonging to PLMN1 and the region is Area1 and the a priori frequency point Freq3 under the 5G network standard in Table 1 belong to PLMN2 and the a priori frequency point Freq4 under the 4G network standard belonging to the area Area1 And the prior frequency point Freq5 under the 5G network standard.
  • a priori reselection configuration of the a priori frequency point Freq1 the a priori reselection configuration of the a priori frequency point Freq3, the a priori reselection configuration of the a priori frequency point Freq4, and the a priori reselection configuration of the a priori frequency point Freq5.
  • a priori reselection configurations These four a priori reselection configurations are for,reselection evaluation.
  • the a priori frequency point information selected by the terminal meets two requirements.
  • the first requirement is the region under the PLMN (non-shared) belonging to the operator and the region where the terminal is currently located.
  • the second requirement is that the operator jointly builds and shares a priori frequency point information in the region where the terminal is currently located;
  • the network standard of the a priori frequency point information can be the same as the terminal's current region.
  • the network standard is the same, or it can be different network standards.
  • the terminal can select according to the priority of the a priori frequency point information that meets the requirements. For the description of the priority, please refer to the above description; in another implementation, the terminal can first select the first requirement. a priori frequency point information, and then select a priori frequency point information that meets the second requirement.
  • the terminal only selects a priori frequency point information that meets the first requirement; in another implementation method, the terminal You can select a priori frequency point information that partially satisfies the first requirement, and select a priori frequency point information that partially satisfies the second requirement, so that the first requirement and the second requirement can be taken into account at the same time, and the operator of the frequency point can be realized. diversification. For example, when a limited number of neighboring cells are configured, the terminal can select a priori frequency point information using the above implementation method.
  • step S208 Determine whether the usage scenario is an operator's inter-network roaming scenario. If so, perform step S209. If not, prohibit adding a priori frequency point information.
  • the terminal can select two types of a priori frequency point information based on the region. One is that it belongs to the same operator as the PLMN currently registered by the terminal, and the region is the same as the region where the current terminal is located. The other is the a priori frequency point information of the PLMN that can be roamed from the current PLMN, and the area is the same as the area where the current terminal is located.
  • the frequency point of the currently accessed cell is Freq0
  • PLMN1 supports roaming from different networks to the 5G network standard of PLMN2, and supports roaming in different networks in Area1
  • the frequency point Freq0 The signal quality is poor and the terminal has not switched to a cell with good signal quality within a period of time.
  • the access network equipment is only configured with the 4G neighboring cell frequency point Freq1
  • the terminal can be added to the prior frequency in the neighboring cell configuration.
  • the point information includes: the a priori frequency point Freq1 under the 4G network standard belonging to PLMN1 and the area is Area1 in Table 1, and the a priori frequency point Freq3 under the 5G network standard belonging to PLMN2 and the area being Area1 in Table 1.
  • the a priori frequency point Freq4 in the 4G network standard belonging to PLMN2 and the region is Area1 is not added to the neighbor cell configuration because PLMN1 does not support roaming from another network to the 4G network standard of PLMN2.
  • the selection configuration is for reselection evaluation.
  • the a priori frequency point information selected by the terminal meets two requirements.
  • the first requirement is that the region under the PLMN (non-shared) belonging to the operator is the same as the region where the terminal is currently located.
  • the second requirement is that the area under the PLMN that the PLMN can roam to is the same as the area where the terminal is currently located; the network standard of the a priori frequency information can be the same as the current network standard of the terminal It can be the same one, or it can be a different network standard.
  • the terminal can select according to the priority of the a priori frequency point information that meets the requirements. For the description of the priority, please refer to the above description; in another implementation, the terminal can first select the priority that meets the first requirement. Prioritize the frequency point information, and then select the a priori frequency point information that meets the second requirement.
  • the terminal only selects the a priori frequency point information that meets the first requirement; in another implementation method, the terminal can select A priori frequency point information that partially meets the first requirement is selected, and a priori frequency point information that partially meets the second requirement is selected, so that both the first requirement and the second requirement are taken into consideration, and diversification of operators to which the frequency points belong is achieved. For example, when a limited number of adjacent cells are configured, the terminal can select a priori frequency point information using the above implementation method.
  • the terminal cannot add a priori frequency points under the 5G network standard of PLMN2 when it is in Area2. If PLMN1 is in Area1 and supports roaming from another network to the 5G network standard of PLMN2, and PLMN1 and PLMN2 belong to operators shared by both 4G and 5G, then the neighboring cell configuration can also add the PLMN2 in Table 1 and the area is Area1. The prior frequency point Freq4 under the 4G network standard. If the terminal supports both co-construction and sharing and inter-network roaming, the terminal can select a priori frequency point information by referring to the single operator scenario, operator co-construction and sharing scenario, and operator inter-network roaming scenario.
  • the terminal can first select the a priori frequency point information from a single operator, then select the a priori frequency point information from the operator's co-construction and sharing, and finally select the a priori frequency point information from the operator's inter-network roaming, so that neighboring cells
  • the number of frequency point information in the configuration is not greater than the preset number (that is, the maximum number of frequency point information).
  • select a priori frequency point information in the same scene select a priori frequency point information with a higher priority.
  • S210 Perform measurement and reselection evaluation based on the neighbor cell frequency information configured by the network and the added a priori frequency information.
  • the a priori frequency point information saved by the terminal in advance can be applied to the cell reselection process.
  • the terminal can select matching a priori frequency point information according to the usage scenario. It is possible to select different a priori frequency point information according to different usage scenarios to adapt to the needs of the current usage scenario of the terminal. Then combine the neighbor cell frequency information configured by the access network equipment and the a priori frequency point information added by the terminal to perform measurement and reselection evaluation. Because a priori frequency point information is added to the neighbor cell configuration, search under the a priori frequency point information.
  • the terminal can perform reselection evaluation based on the a priori reselection configuration in the a priori frequency point information, and reuse the reselection used before the a priori frequency point information. configuration, eliminating the need to pre-prepare and reselect the a priori frequency point information.
  • the terminal can Initiate the cell reselection process. Because cell 2 has a neighbor relationship with cell 1, the frequency of cell 2 is configured as a neighbor frequency by the access network device in the neighbor configuration. Although cell 3 has a one-way neighbor relationship with cell 1, the frequency point of cell 3 is written into the a priori frequency table in Table 1 as a priori frequency point. The frequency point of cell 3 can be used as the a priori frequency point of cell 1.
  • the terminal can add the frequency point of cell 3 to the neighboring cell configuration, and the terminal can measure and reselect the frequency point of cell 2 and cell 3, so that the terminal can reselect to cell 2 or cell 3.
  • the number of cells that the terminal can reselect is increased, and the possibility of the terminal being reselected to a cell with a better signal is improved.
  • the cell reselection method described in the above embodiments can be applied to mobile phones, tablet computers, desktops, laptops, notebook computers, ultra-mobile personal computers (UMPC), handheld computers, netbooks, and personal digital computers.
  • Assistant Personal Digital Assistant, PDA
  • wearable electronic devices smart watches and other terminals.
  • the terminal may include a processor and a memory; wherein the memory is used to store one or more computer program codes.
  • the computer program codes include computer instructions. When the processor executes the computer instructions, the processor performs the above cell reselection method.
  • FIG. 4 is a hardware structure diagram of a terminal provided by an embodiment of the present application.
  • the terminal may include: processor, external memory interface, internal memory, universal serial bus (USB) interface, charging management module, power management module, battery, antenna 1, antenna 2, mobile communication module, wireless communication Modules, sensor modules, positioning modules, buttons, motors, indicators, cameras, displays, and subscriber identification module (SIM) card interfaces, etc.
  • the audio module can include speakers, receivers, microphones, headphone jacks, etc.
  • the sensor module can include pressure sensors, gyroscope sensors, air pressure sensors, magnetic sensors, acceleration sensors, distance sensors, proximity light sensors, fingerprint sensors, temperature sensors, and touch sensors. , ambient light sensor, bone conduction sensor, etc.
  • the structure illustrated in this embodiment does not constitute a specific limitation on the terminal.
  • the terminal may include more or fewer components than shown, or some components may be combined, or some components may be separated, or may be arranged differently.
  • the components illustrated may be implemented in hardware, software, or a combination of software and hardware.
  • the processor may include one or more processing units.
  • the processor may include an application processor (application processor, AP), a modem processor, a graphics processing unit (GPU), an image signal processor (image signal processor (ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processing unit (NPU), etc.
  • application processor application processor, AP
  • modem processor graphics processing unit
  • GPU graphics processing unit
  • ISP image signal processor
  • controller video codec
  • digital signal processor digital signal processor
  • baseband processor baseband processor
  • NPU neural network processing unit
  • different processing units can be independent devices or integrated in one or more processors.
  • the processor is the nerve center and command center of the terminal.
  • the controller can generate operation control signals based on the instruction operation code and timing signals to complete the control of fetching and executing instructions.
  • the external memory interface can be used to connect external memory cards, such as Micro SD cards, to expand the storage capabilities of the terminal.
  • the external memory card communicates with the processor through the external memory interface to implement data storage functions. For example, save a priori information in an external memory card.
  • Internal memory may be used to store computer executable program code, which includes instructions.
  • the processor executes instructions stored in the internal memory to execute various functional applications and data processing of the terminal. For example, in this application, the processor causes the terminal to execute the cell reselection method provided by this application by running instructions stored in the internal memory.
  • Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in a terminal can be used to cover a single or multiple communication bands. Different antennas can also be reused to improve antenna utilization.
  • Antenna 1 can be reused as a diversity antenna for a wireless LAN.
  • antennas may be used in conjunction with tuning switches.
  • Mobile communication modules can provide wireless communication solutions including 2G/3G/4G/5G applied to terminals.
  • the wireless communication module can provide applications on the terminal including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), Bluetooth (bluetooth, BT), global navigation satellite system (global Navigation satellite system, GNSS), frequency modulation (FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions.
  • WLAN wireless local area networks
  • Wi-Fi wireless fidelity
  • Bluetooth bluetooth, BT
  • global Navigation satellite system global Navigation satellite system
  • FM frequency modulation
  • NFC near field communication technology
  • infrared technology infrared, IR
  • FIG. 5 is a software structure block diagram of a terminal according to an embodiment of the present application.
  • the layered architecture divides the software into several layers, and each layer has clear roles and division of labor.
  • the layers communicate through software interfaces.
  • the Android system is divided into four layers, from top to bottom: application layer, application framework layer, Android runtime and system libraries, and kernel layer.
  • the application layer can include a series of application packages. As shown in Figure 5, the application package can include camera, gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, short message and other applications.
  • the application framework layer provides an application programming interface (API) and programming framework for applications in the application layer.
  • the application framework layer includes some predefined functions. As shown in Figure 5, the application framework layer can include a window manager, content provider, resource manager, notification manager, view system, etc.
  • a window manager is used to manage window programs.
  • the window manager can obtain the display size, determine whether there is a status bar, lock the screen, capture the screen, etc.
  • Content providers are used to store and retrieve data and make this data accessible to applications.
  • the data may include videos, images, audio, prior frequency point information, browsing history and bookmarks, etc.
  • the resource manager provides various resources to applications, such as localized strings, icons, pictures, layout files, video files, etc.
  • the notification manager allows applications to display notification information in the status bar, which can be used to convey notification-type messages and can automatically disappear after a short stay without user interaction. For example, the notification manager is used to notify download completion, message reminders, etc.
  • the notification manager can also be notifications that appear in the status bar at the top of the system in the form of charts or scroll bar text, such as notifications for applications running in the background, or notifications that appear on the screen in the form of conversation windows. For example, prompt text information in the status bar, sound a beep, vibrate, blink the indicator light, etc.
  • the view system includes visual controls, such as controls that display text, controls that display pictures, etc.
  • a view system can be used to build applications.
  • the display interface can be composed of one or more views.
  • a display interface including a text message notification icon may include a view for displaying text and a view for displaying pictures.
  • Android Runtime includes core libraries and virtual machines. Android runtime is responsible for the scheduling and management of the Android system. In some embodiments of this application, the cold start of the application will be run in the Android runtime, and the Android runtime will obtain the optimized file status parameters of the application. Then the Android runtime can determine whether the optimized file is outdated due to system upgrades through the optimized file status parameters. , and returns the judgment result to the application management module.
  • the core library contains two parts: one is the functional functions that need to be called by the Java language, and the other is the core library of Android.
  • the application layer and application framework layer run in virtual machines.
  • the virtual machine executes the java files of the application layer and application framework layer into binary files.
  • the virtual machine is used to perform object life cycle management, stack management, thread management, security and exception management, and garbage collection and other functions.
  • System libraries can include multiple functional modules. For example: surface manager (surface manager), media libraries (Media Libraries), three-dimensional graphics processing libraries (for example: OpenGL ES), two-dimensional graphics engines (for example: SGL), etc.
  • the surface manager is used to manage the display subsystem and provides the fusion of 2D and 3D layers for multiple applications.
  • the media library supports playback and recording of a variety of commonly used audio and video formats, as well as static image files, etc.
  • the media library can support multiple audio and video encoding formats, such as: PEG2, H.262, MP3, AAC, AMR, JPG, PNG, etc.
  • the 3D graphics processing library is used to implement 3D graphics drawing, image rendering, synthesis and layer processing.
  • 2D Graphics Engine is a drawing engine for 2D drawing.
  • the kernel layer is the layer between hardware and software.
  • the kernel layer includes at least display driver, camera driver, audio driver, sensor driver, etc.
  • Embodiments of the present application also provide a computer storage medium.
  • the computer storage medium includes computer instructions. When the computer instructions are run on the terminal, the terminal is caused to perform the above cell reselection method.
  • An embodiment of the present application also provides a computer program product.
  • the computer program product includes a computer program. When the computer program is run by a terminal, it causes the terminal to perform the above cell reselection method.

Abstract

本申请实施例一种小区重选方法及装置，小区重选方法包括：终端从多个先验频点信息中选择至少一个目标先验频点信息；根据目标先验频点信息进行测量和重选评估；根据重选评估的结果进行小区重选。

Description

小区重选方法及装置
本申请要求2022年04月08日提交中国国家知识产权局、申请号为202210365579.6、发明名称为“小区重选方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种小区重选方法及装置。
背景技术
在移动通信场景下，小区重选可以理解为在多小区共存的情况下，终端选择一个小区，从当前小区切换至所选择的小区，进一步的，终端可以在接入的小区内进行业务。但有可能因为网络配置等原因而导致终端无法接入较优的小区。可见，终端的小区重选有待改进。
发明内容
本申请提供了一种小区重选方法及装置，目的在于提高终端重选至信号较好的小区的可能性。
为了实现上述目的，本申请提供了以下技术方案：
第一方面，本申请提供一种小区重选方法，方法包括：终端从多个先验频点信息中选择至少一个目标先验频点信息；根据目标先验频点信息进行测量和重选评估；根据重选评估的结果进行小区重选。目标先验频点信息可以是终端从多个先验频点信息中选择的先验频点信息。在本实施例中，终端可以主动增加目标先验频点信息，将增加的目标先验频点信息用于小区重选过程中。如在目标先验频点信息下搜索小区，从而增加了可重选的小区数量，提高终端重选至信号较好的小区的可能性。
在一种可能的实现方式中，目标先验频点信息添加到邻区配置中，邻区配置中有网络设备配置的邻区频点信息；根据目标先验频点信息进行测量和重选评估包括：根据邻区频点信息中的邻区频点进行测量，得到第一测量结果，根据邻区频点信息中的邻区重选配置对第一测量结果进行重选评估；根据目标先验频点信息中的先验频点进行测量，得到第二测量结果，根据目标先验频点中的先验重选配置对第二测量结果进行重选评估。终端除了利用目标先验频点信息搜索小区之外，终端还可以利用网络设备(如基站)配置的邻区频点信息搜索小区，以利用目标先验频点信息和邻区频点信息进行小区重选，从而使得终端可以主动增加目标先验频点信息之外，还可以复用邻区频点信息的小区重选流程，在增加可重选的小区数量和提高重选至信号较好的小区的可能性的同时，复用小区重选流程。
终端在利用邻区频点信息和目标先验频点信息进行小区重选过程中，终端利用邻区频点信息中的邻区频点进行测量以及利用邻区频点信息中的邻区重选配置进行重选评估，终端利用目标先验频点信息中的先验频点进行测量以及利用目标先验频点信息中的先验重选配置进行重选评估，实现对不同类型频点采用各自匹配的重选配置进行重选评估，提高重选评估的准确度。对于目标先验频点信息来说，终端可以复用目标先验频点信息之前使用过的重选配置(对应先验重选配置)，省去对目标先验频点信息预制先验重选配置的过程。
在一种可能的实现方式中，终端从多个先验频点信息中选择至少一个目标先验频点信息包括：根据终端的使用场景，从多个先验频点信息中选择至少一个目标先验频点信息，实现根据不同使用场景选择不同的先验频点信息，以适配终端当前所处使用场景的需求。
在一种可能的实现方式中，根据终端的使用场景，从多个先验频点信息中选择至少一个目标先验频点信息包括：根据终端的使用场景，从多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息。其中区域可以是一个地域，地域的范围可以是城市级别。区域也可以是终端定位的一个区域范围的围栏。终端在一个使用场景下，其选择的目标先验频点信息是区域与终端所处区域相同的先验频点信息，使得终端可以在该目标先验频点信息的信号覆盖范围内，提高重选的成功率。终端对使用场景的判断可以是基于终端当前注册的公共陆地移动网确定，例如终端可以提前预制公共陆地移动网所属使用场景，如提前预制公共陆地移动网和使用场景的对应关系。当终端注册到一个公共陆地移动网下时，终端可以基于提前预制的对应关系，确定当前注册的公共陆地移动网所属使用场景。
在一种可能的实现方式中，根据终端的使用场景，从多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：确定终端的使用场景为第一使用场景，在第一使用场景下终端注册在第一公共陆地移动网中且终端处于第一区域；从多个先验频点信息中选择与第一公共陆地移动网属于同一个运营商、区域为第一区域的目标先验频点。其中，第一使用场景可以是单运营商场景，单运营商场景可以是指第一公共陆地移动网属于单一运营商，例如第一公共陆地移动网属于运营商A。在第一使用场景下，终端选择的目标先验频点信息满足条件(也可以称为要求)：与第一公共陆地移动网属于同一个运营商、区域为第一区域。
例如在第一使用场景下，第一公共陆地移动网属于运营商A且终端处于区域1，终端可以选择运营商A的公共陆地移动网下的、区域为区域1的目标先验频点信息。例如终端可以选择第一公共陆地移动网下的，区域为区域1的目标先验频点信息。
在一种可能的实现方式中，根据终端的使用场景，从多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：确定终端的使用场景为第二使用场景，在第二使用场景下终端注册在第二公共陆地移动网中且终端处于第二区域；从多个先验频点信息中选择满足第一条件的目标先验频点信息以及满足第二条件的目标先验频点信息，第一条件是与第二公共陆地移动网属于同一个运营商、区域为第二区域，第二条件是第二公共陆地移动网所属运营商共建共享的公共陆地移动网、区域为第二区域。
其中第二使用场景可以是运营商共建共享场景，运营商共建共享场景是指公共陆地移动网是至少两个运营商可共享的，即一个公共陆地移动网属于至少两个运营商，例如第二公共陆地移动网属于运营商A和运营商B。在第二使用场景下，终端可以参照第一条件和第二条件进行目标先验频点信息的选择。第一条件可以称为第一个要求，第二条件可以称为第二个要求。
在一种可能的实现方式中，根据终端的使用场景，从多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：确定终端的使用场景为第三使用场景，在第三使用场景下终端注册在第三公共陆地移动网中且终端处于第三区域；从多个先验频点信息中选择满足第三条件的目标先验频点信息以及满足第四条件的目标先验频点信息，第三 条件是与第三公共陆地移动网属于同一个运营商、区域为第三区域，第四条件是从第三公共陆地移动网漫游至的公共陆地移动网、区域为第三区域。
其中，第三使用场景可以是运营商异网漫游场景，运营商异网漫游场景可以是指从一个运营商的公共陆地移动网可以漫游至另一个运营商的公共陆地移动网，两个公共陆地移动网对应的网络制式可以不同。例如可以从运营商A的一个公共陆地移动网漫游至运营商B的一个公共陆地移动网。在第三使用场景下，终端可以参照第三条件和第四条件进行目标先验频点信息的选择。第三条件可以称为第一要求，第四条件可以称为第二要求。
在一种可能的实现方式中，根据终端的使用场景，从多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：确定终端的使用场景为第四使用场景，在第四使用场景下终端注册在第四公共陆地移动网中且终端处于第四区域；从多个先验频点信息中选择满足第五条件的目标先验频点信息、满足第六条件的目标先验频点信息以及满足第七条件的目标先验频点信息，第五条件是与第四公共陆地移动网属于同一个运营商、区域为第四区域，第六条件是第四公共陆地移动网所属运营商共建共享的公共陆地移动网、区域为第四区域，第七条件是从第四公共陆地移动网漫游至的公共陆地移动网、区域为第四区域。其中，第四使用场景可以是支持共建共享和异网漫游，在第四使用场景中，终端可以参照第五条件、第六条件和第七条件选择目标先验频点信息。第五条件对应第一条件或第三条件，第六条件对应第二条件，第七条件对应第四条件。
终端在第一使用场景至第四使用场景中选择目标先验频点信息过程中，终端选择的目标先验频点信息的网络制式可以和终端当前的网络制式是同一个，也可以是不同网络制式。终端可以选择满足条件的所有目标先验频点，也可以选择满足条件的部分先验频点信息，如果选择满足部分目标先验频点信息，终端可以按照先验频点信息的优先级进行选择，如选择优先级高的目标先验频点信息。
其中第一条件的优先级高于第二条件的优先级，终端在第二使用场景中，可以先基于第一条件选择目标先验频点信息，然后再基于第二条件选择目标先验频点信息。在同一个条件下终端可以按照优先级选择目标先验频点信息。因为优先级越高的目标先验频点信息，信号质量较高且重选成功几率也高，所以按照优先级选择目标先验频点信息可以使得终端提高重选至信号质量好的小区的记录以及提高重选成功记录。又或者，终端可以按照第一条件选择部分目标先验频点信息，按照第二条件选择部分目标先验频点信息，使得终端能够选择到不同类型的目标先验频点信息，实现同时兼顾第一条件和第二条件，使得目标先验频点信息可以多样化。第三条件的优先级高于第四条件的优先级，终端在第三使用场景中可参照上述第二使用场景的说明选择目标先验频点信息。第五条件的优先级高于第六条件的优先级，第六条件的优先级高于第七条件的优先级，终端在第四使用场景中可参照上述第二使用场景的说明选择目标先验频点信息。
在一种可能的实现方式中，终端从多个先验频点信息中选择至少一个目标先验频点信息包括：根据先验频点信息的优先级，从多个先验频点信息中选择至少一个目标先验频点信息。因为优先级越高的目标先验频点信息，信号质量较高且重选成功几率也高，所以按照优先级选择目标先验频点信息可以使得终端提高重选至信号质量好的小区的记录以及提高重选成功记录。
在一种可能的实现方式中，如果将目标先验频点信息添加至邻区配置，邻区配置中频点信息数量小于或等于预设数量。其中，预设数量可以是邻区配置中频点信息的最大数量，以限定邻区配置中频点信息的总数，增加小区重选数量的同时能够缩短小区重选的耗时。
在一种可能的实现方式中，终端从多个先验频点信息中选择至少一个目标先验频点信息包括：终端在确定满足预设条件时，从多个先验频点信息中选择至少一个目标先验频点信息，预设条件包括第一预设条件和/或第二预设条件；第一预设条件是邻区配置中网络设备配置的邻区频点信息的数量小于数量阈值，或者邻区配置中没有邻区频点信息；第二预设条件是当前接入的小区的信号质量小于第一阈值，且预设时间内没有切换到信号质量大于第二阈值的小区，第一阈值小于第二阈值。第二预设条件表示终端当前接入的小区的信号质量差，且预设时间内没有切换到信号质量较好的小区。终端通过第一预设条件和/或第二预设条件控制对先验频点信息的使用，尽可能的减少终端对先验频点信息的使用/依赖。
在一种可能的实现方式中，方法还包括：根据终端成功驻留的多个频点的相关信息，得到每个频点的先验频点信息。频点的相关信息可以包括：频点所属公共陆地移动网、频点取值、频点所处区域、频点对应的网络制式、频点的重选配置、频点的使用次数和重选配置的使用次数等，终端可通过统计方式得到每个频点的先验频点信息。一个频点的先验频点信息可以包括先验频点和重选配置，重选配置用于指示重选判决准则，例如重选配置至少包括：重选优先级、高低优先级重选门限和重选定时器等。先验频点信息区分国家、运营商、网络制式和地域，从而通过国家、运营商、网络制式和区域等对先验频点信息进行区分，其中国家和运营商可通过公共陆地移动网表示。
在统计得到先验频点信息时，终端可以根据频点的使用次数和重选配置的使用次数得到，例如将使用比例最大的确定为先验频点信息。使用比例越大说明先验频点信息被使用的概率越大，基于先验频点信息中的先验频点和先验重选配置重选的小区的信号质量较优，因此如果将先验频点信息存储在数据表中，使用比例越大先验频点信息的排序越靠前，在终端进行小区重选时排序靠前的先验频点信息可以被优先选择。先验频点信息可以存储在终端本地，也可以存储在服务器中。
第二方面，本申请提供一种终端，终端包括：处理器和存储器；其中，存储器用于存储一个或多个计算机程序代码，计算机程序代码包括计算机指令，当处理器执行计算机指令时，处理器执行上述小区重选方法。
第三方面，本申请一种计算机存储介质，计算机存储介质包括计算机指令，当计算机指令在终端上运行时，使得终端执行上述小区重选方法。
附图说明
图1为本申请提供的多个小区的邻区关系示意图；
图2为本申请提供的一种通信方法的流程图；
图3为本申请提供的另一种通信方法的流程图；
图4为本申请提供的终端的硬件结构图；
图5为本申请提供的终端的软件架构图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。以下实施例中所使用的术语只是为了描述特定实施例的目的，而并非旨在作为对本申请的限制。如在本申请的说明书和所附权利要求书中所使用的那样，单数表达形式“一个”、“一种”、“所述”、“上述”、“该”和“这一”旨在也包括例如“一个或多个”这种表达形式，除非其上下文中明确地有相反指示。还应当理解，在本申请实施例中，“一个或多个”是指一个、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。
在本说明书中描述的参考“一个实施例”或“一些实施例”等意味着在本申请的一个或多个实施例中包括结合该实施例描述的特定特征、结构或特点。由此，在本说明书中的不同之处出现的语句“在一个实施例中”、“在一些实施例中”、“在其他一些实施例中”、“在另外一些实施例中”等不是必然都参考相同的实施例，而是意味着“一个或多个但不是所有的实施例”，除非是以其他方式另外特别强调。术语“包括”、“包含”、“具有”及它们的变形都意味着“包括但不限于”，除非是以其他方式另外特别强调。
本申请实施例涉及的多个，是指大于或等于两个。需要说明的是，在本申请实施例的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
为了便于说明，先对本申请实施例涉及的技术术语进行解释：
无线通信系统可以理解为包括终端和网络设备。终端也可被称为终端设备(Terminal Equipment)、用户设备(User Equipment)、移动台(Mobi1e Station，MS)、以及移动终端(Mobi1e Termina1)等。网络设备包括无线电接入网设备以及核心网设备的至少一项，无线电接入网设备的一种示例为基站，核心网设备的一种示例为移动性管理实体(Mobility Management Entity，MME)。
无线通信系统包括但不限于：全球移动通信(Global System of Mobile Communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、以及第5代移动通信系统(Fifth Generation Mobile Communication Systems，5G)。
GSM系统又可被称为第2代通信系统，即2G。CDMA系统以及WCDMA系统又可被称为第3代通信系统，即3G。LTE系统、LTE TDD系统等，又可被称为第4代通信系统，即4G。
网络共享可以理解为不同的运营商共享网络的无线电资源，即多个运营商共享无线电接入网络。
小区重选(Cell Reselection)指终端在IDLE(空闲)状态下完成的小区再选择。终端在IDLE状态下通过监测邻区的信号质量和当前小区的信号质量以选择一个最好的小区提供服务信号的过程。
后代制式和前代制式：按照网络制式的发展先后排序得到序列：2G、3G、4G、5G，后代制式和前代制式是该序列的所有网络制式中任意两个制式相对而言的，该序列中靠前的制式为靠后的制式的前代制式，靠后的制式为靠前的制式的后代制式，例如，5G为2G、3G和4G的后代制式，3G为2G的后代制式，3G为4G的前代制式。
先验频点又称为历史频点，先验频点可以理解为终端成功驻留的频点。终端在成功驻留到某个频点的小区后，将该频点作为先验频点。一个小区可以具有多个频点，不同小区可以具有相同的频点。
图1为网络共享场景下无线网络的配置示例：
假设小区1是运营商A的5G独立组网(Standalone，SA)的网络的小区，小区2是运营商A的LTE网络(又可称为4G网络)的小区。小区2为5G网络的锚点小区，但信号强度在-95dB左右，虽然在终端上显示为5G网络但用户在该小区体验到的网络速率较差。
小区3是运营商B的LTE网络的小区。假设小区3的信号强度在-80dB左右，且并非锚点小区，在终端上显示为4G网络，用户在该小区体验到的网络速率较好。
小区1和小区2预先被配置邻区关系。小区3与小区1被预先配置单向邻区关系，基于通信协议，单向邻区关系使得终端可以从小区3重选到小区1，但终端不能从小区1重选到小区3。小区3与小区2之间没有配置邻区关系，基于通信协议，终端不能从小区2重选到小区3，也不能从小区3重选到小区2。
以终端为手机为例，假设手机开机后驻留在小区1且与小区1建立RRC连接，或者手机移动到小区1后与小区1建立RRC连接，即手机处于5G网络的小区1中。假设小区1的信号不佳，如当前的信号强度在-115dB左右，终端可以发起小区重选流程。
基于上述资源配置，因为小区2与小区1具有邻区关系，小区3与小区1具有单向邻区关系，所以，手机可以从小区1重选到小区2，但是不能从小区1重选到小区3。由此虽然小区3的信号质量优于小区2的信号质量，但是因为小区3与小区1之间是单向邻区关系，所以手机无法从小区1重选到小区3。
可见，在网络共享的场景下，虽然手机能够实现小区重选，但存在无法重选到信号较好的小区的可能性。进一步的，发明人在研究的过程中发现，因为某些原因，难以在不同的运营商的小区之间配置邻区关系，所以难以通过配置小区1和小区3的邻区关系来实现小区1向小区3的重选。
本申请实施例提供的小区重选方法，目的在于提高终端重选至信号较好的小区的可能性。此外，本申请实施例提供的小区重选方法，适用于但并不限于图1所示的场景：
除了可以用在网络共享的场景之外，还可以应用在非网络共享的场景，例如，图1所示的小区1、小区2和小区3还可以均为运营商A的小区。在此情况下，即使小区1与小区3被预先配置邻区关系，也可以使用本申请实施例提供的方法重选小区。
除了可以用在不同制式网络(如图1所述的5G网络和4G网络)之间的小区重选之外，还可以应用在相同制式网络之间的小区重选，例如，图1所示的三个小区还可以均为5G网络的小区或均为4G网络的小区。
图1中所示的5G SA网络，可以被替换为5G非独立组网(None-Standalone，NSA)的网络。
除了图1所示的5G网络和4G网络之外，还可以用在2G或3G网络，例如从3G网络的小区重选到2G网络的小区。
除了可以从后代制式的网络重选到前代制式的网络之外，还可以从前代制式的网络重构你选到后代制式的网络，例如从4G网络的小区重选向到5G网络的小区，又例如，从3G网络的小区重选到4G或5G网络的小区。
本申请实施例提供的小区重选方法，可以增加先验频点信息到终端的邻区配置中，邻区配置中包括网络配置的邻区频点信息(如基站配置的邻区频点信息)和先验频点信息，对邻区频点信息和先验频点信息进行测量和重选评估，完成小区重选。因为邻区配置中增加了先验频点信息，在先验频点信息下搜索小区，从而增加了可重选的小区数量，提高终端重选至信号较好的小区的可能性。
其中，先验频点信息可以由终端从先验频点数据库中选择，然后将先验频点信息添加到邻区配置中。先验频点数据库中的先验频点信息可以由终端根据大数据统计得到，大数据中记录有终端成功驻留的某个频点的相关信息，根据终端成功驻留的多个频点的相关信息，得到每个频点的先验频点信息。先验频点信息包括先验频点和重选配置，重选配置用于指示重选判决准则，例如重选配置至少包括：重选优先级、高低优先级重选门限和重选定时器等。先验频点信息区分国家、运营商、网络制式和地域，从而通过国家、运营商、网络制式和地域等对先验频点信息进行区分，其中国家和运营商可通过公共陆地移动网(Public Land Mobile Network，PLMN)表示。先验频点数据库可以以数据表形式记录先验频点信息，如表1所示。
表1先验频点表格
运营商PLMN 网络制式RAT 先验频点Freq 地域Area 先验重选配置Config
PLMN1 4G Freq1 Area1 Config1
PLMN1 4G Freq2 Area1 Config1
PLMN1 4G Freq2 Area2 Config1
PLMN1 5G Freq3 Area1 Config2
PLMN2 4G Freq4 Area1 Config3
PLMN2 5G Freq5 Area1 Config4
… … … … …
表1中每行记录一条先验频点信息，如针对运营商1(表1中的PLMN1)的4G网络制式上预制先验频点Freq1，此先验频点Freq1只在地域Area1上有效，且先验频点Freq1具有先验重选配置Config1。其中，地域的范围可以是城市级别，也可以是终端定位的一个区域范围的围栏。
一个地域下的先验频点、先验频点下的先验重选配置可以通过对大数据进行统计方式得到。一个地域中有多个频点，对同一地域下的每个频点，终端可以统计出该区域下每个频点的使用比例，根据该区域下每个频点的使用比例，选取出至少一个频点作为该区域的先验频点。例如终端可以选择使用比例大于预设比例的频点为该区域的先验频点，又例如终端可以选择使用比例较大的频点为该区域的先验频点，其中该区域下每个频点的使用比例＝该区域下该频点的使用次数/该区域下所有频点的使用次数总和。
一个频点下有多个重选配置，对同一频点下的每个重选配置，终端可以统计出该频点下每个重选配置的使用比例，根据该频点下每个重选配置的使用比例，选取出至少一个重选配置作为该频点的先验重选配置。例如终端可以选择使用比例大于预设比例的重选配置为该频点的先验重选配置，又例如终端可以选择使用比例较大的重选配置为该频点的先验重选配置，其中该频点下每个重选配置的使用比例＝该频点下该重选配置的使用次数/该频点下所有重选配置的使用次数总和。
表1中各条先验频点信息的排序可以是随机排列，也可以是统计后排序，如统计先验频点信息的使用比例，使用比例越大说明先验频点信息被使用的概率越大，基于先验频点信息中的先验频点和先验重选配置重选的小区的信号质量较优，因此使用比例越大先验频点信息的排序越靠前。先验频点信息的使用比例＝先验重选配置的使用次数/所有先验重选配置的使用次数总和。
先验频点信息可以存在终端本地，也可以存在服务器，服务器可以是云端。服务器可以主动或被动地向终端发送先验频点信息，如服务器可以采用如下方式向终端发送先验频点信息：
1)服务器可以在更新了先验频点信息之后向终端发送；2)服务器定期向终端发送先验频点信息；3)终端可以向服务器发送获取请求，服务器响应获取请求，向终端发送先验频点信息。服务器发送的先验频点信息可以是更新了的先验频点信息，即服务器中有但终端中没有的先验频点信息。
终端利用先验频点信息进行小区重选的流程如图2所示，可以包括以下步骤：
S101、终端从多个先验频点信息中选择先验频点信息，将选择的先验频点信息添加到邻区配置中。
在某些实现方式中，终端在满足预设条件时选择先验频点信息，其中预设条件包括以下1、2和3的至少一项：
1、邻区配置中网络配置的邻区频点信息的数量小于数量阈值，或者没有邻区频点信息。数量阈值可以预先配置，例如数量阈值为2个。网络配置的邻区频点信息可以是接入网设备(如基站)配置的邻区频点信息，如果邻区频点信息的数量较少，终端在小区重选流程中可选择的小区的范围较小，终端基于邻区频点信息重选到的小区的信号较差，如图1所示的小区2，因此终端可以将邻区配置中邻区频点信息的数量作为预设条件，以触发终端可以向邻区配置中添加先验频点信息。
2、终端当前接入的小区的信号质量差，且预设时间内没有切换到信号质量较好的小区。预设时间可以预先配置，对于预设时间的取值，本实施例不进行限定。
例如，终端从一个小区切换到另一个小区后，又切换回之前的小区。结合图1所示，终端从5G网络的小区1重选到4G网络的小区2后，因为小区2的信号不佳，但又无法从小区1或小区2重选到小区3，所以终端从4G网络的小区2又回到5G网络的小区1。如此终端在进行多次重选后仍驻留在小区1中，说明终端在预设时间内没有切换到信号质量较好的小区。又例如，终端在接入到一个小区后，虽然该小区的信号质量差，但预设时间内没有其他小区可切换，使得终端在预设时间内仍驻留在该小区。
3、终端当前接入的小区的信号质量差，在预设时间内没有切换到信号质量较好的小区。 并且邻区配置中网络配置的邻区频点信息的数量小于数量阈值或者没有邻区频点信息。
S102、根据网络配置的邻区频点信息和添加的先验频点信息进行测量和重选评估。如果邻区配置中邻区频点信息为空(即邻区配置中没有邻区频点信息)，终端可以根据添加的先验频点信息进行测量和重选评估。如果邻区配置中包括邻区频点信息和先验频点信息，终端可以同步利用邻区频点信息中的邻区频点和先验频点信息中的先验频点进行测量。
在重选评估时，针对邻区频点，终端可以利用邻区频点信息中的邻区重选配置进行重选评估；针对先验频点，终端可以利用先验频点信息中的先验重选配置进行重选评估。
S103、根据重选评估的结果，选择并接入到信号质量最好的小区，以使得终端可以重选到邻区配置中信号质量最好的小区。
终端在完成小区重选后，如果重选小区和之前接入小区的标识相同，终端可以不向接入网设备发送重选反馈消息；如果重选小区和之前接入小区的标识不同，终端可以向接入网设备发送重选反馈消息，该重选反馈消息中可以携带重选小区的标识，以通知接入网设备，终端当前接入的小区。
上述小区重选方法中，终端可以增加先验频点信息到终端的邻区配置中，邻区配置中包括网络配置的邻区频点信息(如基站配置的邻区频点信息)和先验频点信息，对邻区频点信息和先验频点信息进行测量和重选评估，完成小区重选。因为邻区配置中增加了先验频点信息，在先验频点信息下搜索小区，从而增加了可重选的小区数量，提高终端重选至信号较好的小区的可能性。
终端可以根据使用场景添加先验频点信息，对应的流程图如图3所示，图3示出了另一种小区重选方法的流程，可以包括以下步骤：
S201、终端当前接入的小区的信号质量差，在预设时间内没有切换到信号质量较好的小区。
S202、邻区配置中网络配置的邻区频点信息的数量小于数量阈值或者没有邻区频点信息。从步骤S201和步骤S202可知，触发终端选择先验频点信息的预设条件是：终端当前接入的小区的信号质量差，在预设时间内没有切换到信号质量较好的小区，并且邻区配置中网络配置的邻区频点信息的数量小于数量阈值或者没有邻区频点信息。
S203、获取终端当前的使用场景。使用场景包括：单运营商场景、运营商共建共享场景和运营商异网漫游场景。单运营商场景是指PLMN属于单一运营商；运营商共建共享场景是指PLMN是至少两个运营商可共享的，即一个PLMN属于至少两个运营商；运营商异网漫游场景是指从一个运营商的PLMN可以漫游至另一个运营商的PLMN，两个PLMN对应的网络制式可以不同。
终端可以提前预制PLMN所属使用场景，如提前预制PLMN和使用场景的对应关系。当终端注册到一个PLMN下时，终端可以基于提前预制的对应关系，确定当前注册的PLMN所属使用场景。
S204、判断使用场景是否是单运营商场景，如果是，执行步骤S205，如果否，执行步骤S206。
S205、在邻区配置中添加使用场景下的运营商的同一地域的先验频点信息。也就是说终端可以根据地域选择属于该运营商的PLMN下的先验频点信息，所选择的先验频点信息 可以是和终端当前注册的PLMN属于同一个运营商，且地域与当前终端所处地域相同的先验频点信息。
以上述表1为例，假如终端注册在PLMN1下，当前接入的小区的频点是Freq0，PLMN1属于单运营商，那么如果频点Freq0的信号质量差、终端在一段时间内没有切换到信号质量好的小区，在Area1时接入网设备只配置了4G的邻区频点Freq1，则终端可以将表1中属于PLMN1、地域为Area1的4G网络制式下的先验频点Freq1和5G网络制式下的先验频点Freq3添加到邻区配置中，在邻区配置中还可以添加先验频点Freq1的先验重选配置、先验频点Freq3的先验重选配置，这两个先验重选配置是为了进行重选评估。
从举例可知，在单运营商场景下，终端选择的先验频点信息满足要求，该要求是属于该运营商的PLMN下地域与终端当前所处地域相同的先验频点信息，先验频点信息的网络制式可以和终端当前的网络制式是同一个，也可以是不同网络制式。
在选择频点时可以选择满足该要求的所有先验频点信息，也可以选择满足该要求的部分先验频点信息。例如邻区配置可以限定数量，如果满足要求的先验频点信息的数量超过邻区配置的限定，则选择部分先验频点信息，以使得邻区配置中频点信息总数不超过其限定。如果选择满足该要求的部分先验频点信息，终端可以按照满足该要求的先验频点信息的优先级进行选择，如选择优先级高的先验频点信息。先验频点信息的优先级通过先验频点信息在表1中的排序表示，排序越靠前优先级越高，排序越靠后优先级越低。
S206、判断使用场景是否是运营商共建共享场景，如果是，执行步骤S207，如果否，执行步骤S208。
S207、在邻区配置中添加使用场景下的运营商的同一地域的先验频点信息、和该运营商共享的同一地域的先验频点信息。在使用场景是运营商共建共享场景下，终端可以根据地域选择两种类型的先验频点信息，一个是和终端当前注册的PLMN属于同一个运营商，且地域与当前终端所处地域相同的先验频点信息；另一个是终端当前注册的PLMN所属运营商共建共享的，且地域与当前终端所处地域相同的先验频点信息。
以上述表1为例，假如终端注册在PLMN1下，当前接入的小区的频点是Freq0，PLMN1和PLMN2是属于4G和5G都共享的运营商，那么如果频点Freq0的信号质量差、终端在一段时间内没有切换到信号质量好的小区，在Area1时接入网设备只配置了4G的邻区频点Freq1，则终端可以添加至邻区配置中的先验频点信息包括：表1中属于PLMN1、地域为Area1的4G网络制式下的先验频点Freq1和5G网络制式下的先验频点Freq3，表1中属于PLMN2、地域为Area1的4G网络制式下的先验频点Freq4和5G网络制式下的先验频点Freq5。
在邻区配置中还可以添加先验频点Freq1的先验重选配置、先验频点Freq3的先验重选配置、先验频点Freq4的先验重选配置、先验频点Freq5的先验重选配置，这四个先验重选配置是为了进行重选评估。
从举例可知，在运营商共建共享场景下，终端选择的先验频点信息满足两个要求，第一个要求是属于该运营商的PLMN(非共享的)下地域与终端当前所处地域相同的先验频点信息，第二个要求是该运营商共建共享的PLMN下地域与终端当前所处地域相同的先验频点信息；先验频点信息的网络制式可以和终端当前的网络制式是同一个，也可以是不同 网络制式。
在选择频点时可以选择满足要求的所有先验频点信息，也可以选择满足要求的部分先验频点信息。在一种实现方式中，终端可以按照满足要求的先验频点信息的优先级进行选择，优先级的说明请参见上述说明；在另一种实现方式中，终端可以先选择满足第一个要求的先验频点信息，再选择满足第二个要求的先验频点信息，这种方式存在终端仅选择到满足第一个要求的先验频点信息；在再一种实现方式中，终端可以根据选择部分满足第一个要求的先验频点信息，选择部分满足第二个要求的先验频点信息，使得同时兼顾第一个要求和第二个要求，实现频点所属运营商的多样化。例如邻区配置限定数量时，终端可以采用上述实现方式选择先验频点信息。
S208、判断使用场景是否是运营商异网漫游场景，如果是，执行步骤S209，如果否，禁止添加先验频点信息。
S209、在邻区配置中添加使用场景下的运营商的同一地域的先验频点信息、和支持异网漫游的网络制式在同一地域的先验频点信息。在使用场景是运营商异网漫游场景下，终端可以根据地域选择两种类型的先验频点信息，一个是和终端当前注册的PLMN属于同一个运营商，且地域与当前终端所处地域相同的先验频点信息；另一个是从当前PLMN可漫游至的PLMN，且地域与当前终端所处地域相同的先验频点信息。
以上述表1为例，假如终端注册在PLMN1下，当前接入的小区的频点是Freq0，PLMN1支持异网漫游到PLMN2的5G网络制式，且在Area1支持异网漫游，那么如果频点Freq0的信号质量差、终端在一段时间内没有切换到信号质量好的小区，在Area1时接入网设备只配置了4G的邻区频点Freq1，则终端可以添加至邻区配置中的先验频点信息包括：表1中属于PLMN1、地域为Area1的4G网络制式下的先验频点Freq1和5G网络制式下的先验频点Freq3，表1中属于PLMN2、地域为Area1的5G网络制式下的先验频点Freq5。属于PLMN2、地域为Area1的4G网络制式下的先验频点Freq4没有添加至邻区配置中是因为PLMN1不支持异网漫游到PLMN2的4G网络制式。在邻区配置中还可以添加先验频点Freq1的先验重选配置、先验频点Freq3的先验重选配置、先验频点Freq5的先验重选配置，这三个先验重选配置是为了进行重选评估。
从举例可知，在运营商异网漫游场景下，终端选择的先验频点信息满足两个要求，第一要求是属于该运营商的PLMN(非共享的)下地域与终端当前所处地域相同的先验频点信息，第二要求是从该PLMN可漫游至的PLMN下地域与终端当前所处地域相同的先验频点信息；先验频点信息的网络制式可以和终端当前的网络制式是同一个，也可以是不同网络制式。
在选择频点时可以选择满足要求的所有先验频点信息，也可以选择满足要求的部分先验频点信息。在一种实现方式中，终端可以按照满足要求的先验频点信息的优先级进行选择，优先级的说明请参见上述说明；在另一种实现方式中，终端可以先选择满足第一要求的先验频点信息，再选择满足第二要求的先验频点信息，这种方式存在终端仅选择到满足第一要求的先验频点信息；在再一种实现方式中，终端可以根据选择部分满足第一要求的先验频点信息，选择部分满足第二要求的先验频点信息，使得同时兼顾第一要求和第二要求，实现频点所属运营商的多样化。例如邻区配置限定数量时，终端可以采用上述实现方 式选择先验频点信息。
假如终端处于Area2，如果在Area2不支持异网漫游，则终端在Area2时不能添加PLMN2的5G网络制式下的先验频点。假如PLMN1在Area1时，支持异网漫游到PLMN2的5G网络制式，同时PLMN1和PLMN2是属于4G和5G都共享的运营商，那么邻区配置中还可以添加表1中属于PLMN2、地域为Area1的4G网络制式下的先验频点Freq4。如果终端同时支持共建共享和异网漫游，那么终端可以参照单运营商场景、运营商共建共享场景、运营商异网漫游场景选择先验频点信息。例如终端可以优先从单运营商中选择先验频点信息，再从运营商共建共享中选择先验频点信息，最后从运营商异网漫游中选择先验频点信息，以使得邻区配置中频点信息数量不大于预设数量(即频点信息最大数量)。在同一个场景中选择先验频点信息时选择优先级高的先验频点信息。
S210、根据网络配置的邻区频点信息和添加的先验频点信息进行测量和重选评估。
S211、根据重选评估的结果，选择并接入到信号质量最好的小区，以使得终端可以重选到邻区配置中信号质量最好的小区。
从图3所示小区重选方法可知，终端预先保存的先验频点信息可以应用到小区重选过程中，在小区重选过程中，终端可以根据使用场景选择匹配的先验频点信息，实现根据不同使用场景选择不同的先验频点信息，以适配终端当前所处使用场景的需求。然后结合接入网设备配置的邻区频点信息和终端添加的先验频点信息进行测量和重选评估，因为邻区配置中增加了先验频点信息，在先验频点信息下搜索小区，从而增加了可重选的小区数量，提高终端重选至信号较好的小区的可能性。并且对于添加的先验频点信息进行重选评估时，终端可以根据该先验频点信息中的先验重选配置进行重选评估，复用该先验频点信息之前使用过的重选配置，省去对该先验频点信息预制重选配置过程。
结合上述图1场景，假设终端处于5G网络的小区1中，如果小区1的信号不佳，如当前的信号强度在-115dB左右，且终端在一定时间内没有切换到其他小区中，那么终端可以发起小区重选流程。因为小区2与小区1具有邻区关系，那么小区2的频点作为邻区频点被接入网设备配置在邻区配置中。虽然小区3与小区1具有单向邻区关系，但是小区3的频点作为先验频点写入到表1的先验频点表格中，小区3的频点可以作为小区1的先验频点使用，那么终端可以将小区3的频点添加至邻区配置中，终端可以对小区2的频点和小区3的频点进行测量和重选评估，使得终端可以重选至小区2或者小区3中，相对于根据邻区关系仅能重选至小区2来说，增加了终端可重选的小区数量，提高终端重选至信号较好的小区的可能性。
以上实施例所述的小区重选方法，可以适用于手机，平板电脑，桌面型、膝上型、笔记本电脑，超级移动个人计算机(Ultra-mobile Personal Computer，UMPC)，手持计算机，上网本，个人数字助理(Personal Digital Assistant，PDA)，可穿戴电子设备，智能手表等终端。
终端可以包括处理器和存储器；其中，存储器用于存储一个或多个计算机程序代码，计算机程序代码包括计算机指令，当处理器执行计算机指令时，处理器执行上述小区重选方法。
图4为本申请实施例提供的一种终端的硬件结构图。该终端可以包括：处理器，外部 存储器接口，内部存储器，通用串行总线(universal serial bus，USB)接口，充电管理模块，电源管理模块，电池，天线1，天线2，移动通信模块，无线通信模块，传感器模块，定位模块，按键，马达，指示器，摄像头，显示屏，以及用户标识模块(subscriber identification module，SIM)卡接口等。其中音频模块可以包括扬声器，受话器，麦克风，耳机接口等，传感器模块可以包括压力传感器，陀螺仪传感器，气压传感器，磁传感器，加速度传感器，距离传感器，接近光传感器，指纹传感器，温度传感器，触摸传感器，环境光传感器，骨传导传感器等。
可以理解的是，本实施例示意的结构并不构成对终端的具体限定。在另一些实施例中，终端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。
处理器可以包括一个或多个处理单元，例如：处理器可以包括应用处理器(application processor，AP)，调制解调处理器，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。处理器是终端的神经中枢和指挥中心，控制器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。
外部存储器接口可以用于连接外部存储卡，例如Micro SD卡，实现扩展终端的存储能力。外部存储卡通过外部存储器接口与处理器通信，实现数据存储功能。例如将先验信息等保存在外部存储卡中。内部存储器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。处理器通过运行存储在内部存储器的指令，从而执行终端的各种功能应用以及数据处理。例如，在本申请中，处理器通过运行内部存储器中存储的指令，使得终端执行本申请提供的小区重选方法。
天线1和天线2用于发射和接收电磁波信号。终端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。
移动通信模块可以提供应用在终端上的包括2G/3G/4G/5G等无线通信的解决方案。无线通信模块可以提供应用在终端上的包括无线局域网(wireless local area networks，WLAN)(如无线保真(wireless fidelity，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。
图5是本申请实施例的终端的软件结构框图。分层架构将软件分成若干个层，每一层都有清晰的角色和分工。层与层之间通过软件接口通信。在一些实施例中，将Android系统分为四层，从上至下分别为应用程序层，应用程序框架层，安卓运行时(Android runtime)和系统库，以及内核层。
应用程序层可以包括一系列应用程序包。如图5所示，应用程序包可以包括相机，图库，日历，通话，地图，导航，WLAN，蓝牙，音乐，视频，短信息等应用程序。
应用程序框架层为应用程序层的应用程序提供应用编程接口(application programming interface，API)和编程框架。应用程序框架层包括一些预先定义的函数。如图5所示，应用程序框架层可以包括窗口管理器，内容提供器，资源管理器，通知管理器，视图系统等。
窗口管理器用于管理窗口程序。窗口管理器可以获取显示屏大小，判断是否有状态栏，锁定屏幕，截取屏幕等。内容提供器用来存放和获取数据，并使这些数据可以被应用程序访问。所述数据可以包括视频，图像，音频，先验频点信息，浏览历史和书签等。资源管理器为应用程序提供各种资源，比如本地化字符串，图标，图片，布局文件，视频文件等等。通知管理器使应用程序可以在状态栏中显示通知信息，可以用于传达告知类型的消息，可以短暂停留后自动消失，无需用户交互。比如通知管理器被用于告知下载完成，消息提醒等。通知管理器还可以是以图表或者滚动条文本形式出现在系统顶部状态栏的通知，例如后台运行的应用程序的通知，还可以是以对话窗口形式出现在屏幕上的通知。例如在状态栏提示文本信息，发出提示音，振动，指示灯闪烁等。
视图系统包括可视控件，例如显示文字的控件，显示图片的控件等。视图系统可用于构建应用程序。显示界面可以由一个或多个视图组成的。例如，包括短信通知图标的显示界面，可以包括显示文字的视图以及显示图片的视图。
Android Runtime包括核心库和虚拟机。Android runtime负责安卓系统的调度和管理。在本申请一些实施例中，应用冷启动会在Android runtime中运行，Android runtime由此获取到应用的优化文件状态参数，进而Android runtime可以通过优化文件状态参数判断优化文件是否因系统升级而导致过时，并将判断结果返回给应用管控模块。
核心库包含两部分：一部分是java语言需要调用的功能函数，另一部分是安卓的核心库。应用程序层和应用程序框架层运行在虚拟机中。虚拟机将应用程序层和应用程序框架层的java文件执行为二进制文件。虚拟机用于执行对象生命周期的管理，堆栈管理，线程管理，安全和异常的管理，以及垃圾回收等功能。
系统库可以包括多个功能模块。例如：表面管理器(surface manager)，媒体库(Media Libraries)，三维图形处理库(例如：OpenGL ES)，二维图形引擎(例如：SGL)等。表面管理器用于对显示子系统进行管理，并且为多个应用程序提供了2D和3D图层的融合。媒体库支持多种常用的音频，视频格式回放和录制，以及静态图像文件等。媒体库可以支持多种音视频编码格式，例如：PEG2，H.262，MP3，AAC，AMR，JPG，PNG等。三维图形处理库用于实现三维图形绘图，图像渲染、合成和图层处理等。二维图形引擎是2D绘图的绘图引擎。
内核层是硬件和软件之间的层。内核层至少包含显示驱动，摄像头驱动，音频驱动，传感器驱动等。
需要说明的是，本申请实施例虽然以Android系统为例进行说明，但是其基本原理同样适用于基于iOS、Windows等操作系统的终端。
本申请实施例还提供一种计算机存储介质，计算机存储介质包括计算机指令，当计算机指令在终端上运行时，使得终端执行上述小区重选方法。
本申请实施例还提供一种计算机程序产品，计算机程序产品包括计算机程序，当计算机程序被终端运行时，使得终端执行上述小区重选方法。

Claims (26)

  1. 一种小区重选方法，其特征在于，所述方法包括：
    终端从多个先验频点信息中选择至少一个目标先验频点信息；
    根据所述目标先验频点信息进行测量和重选评估；
    根据重选评估的结果进行小区重选。
  2. 根据权利要求1所述的方法，其特征在于，所述目标先验频点信息添加到邻区配置中，所述邻区配置中有网络设备配置的邻区频点信息；
    所述根据所述目标先验频点信息进行测量和重选评估包括：根据所述邻区频点信息中的邻区频点进行测量，得到第一测量结果，根据所述邻区频点信息中的邻区重选配置对所述第一测量结果进行重选评估；
    根据所述目标先验频点信息中的先验频点进行测量，得到第二测量结果，根据所述目标先验频点中的先验重选配置对所述第二测量结果进行重选评估。
  3. 根据权利要求1所述的方法，其特征在于，所述终端从多个先验频点信息中选择至少一个目标先验频点信息包括：
    根据所述终端的使用场景，从所述多个先验频点信息中选择至少一个所述目标先验频点信息。
  4. 根据权利要求3所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择至少一个所述目标先验频点信息包括：
    根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息。
  5. 根据权利要求4所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：
    确定所述终端的使用场景为第一使用场景，在所述第一使用场景下所述终端注册在第一公共陆地移动网中且所述终端处于第一区域；
    从所述多个先验频点信息中选择与所述第一公共陆地移动网属于同一个运营商、区域为所述第一区域的目标先验频点。
  6. 根据权利要求4所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：
    确定所述终端的使用场景为第二使用场景，在所述第二使用场景下所述终端注册在第二公共陆地移动网中且所述终端处于第二区域；
    从所述多个先验频点信息中选择满足第一条件的目标先验频点信息以及满足第二条件的目标先验频点信息，所述第一条件是与所述第二公共陆地移动网属于同一个运营商、区域为所述第二区域，所述第二条件是所述第二公共陆地移动网所属运营商共建共享的公共陆地移动网、区域为所述第二区域。
  7. 根据权利要求4所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：
    确定所述终端的使用场景为第三使用场景，在所述第三使用场景下所述终端注册在第三公共陆地移动网中且所述终端处于第三区域；
    从所述多个先验频点信息中选择满足第三条件的目标先验频点信息以及满足第四条件的目标先验频点信息，所述第三条件是与所述第三公共陆地移动网属于同一个运营商、区域为所述第三区域，所述第四条件是从所述第三公共陆地移动网漫游至的公共陆地移动网、区域为所述第三区域。
  8. 根据权利要求4所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：
    确定所述终端的使用场景为第四使用场景，在所述第四使用场景下所述终端注册在第四公共陆地移动网中且所述终端处于第四区域；
    从所述多个先验频点信息中选择满足第五条件的目标先验频点信息、满足第六条件的目标先验频点信息以及满足第七条件的目标先验频点信息，所述第五条件是与所述第四公共陆地移动网属于同一个运营商、区域为所述第四区域，所述第六条件是所述第四公共陆地移动网所属运营商共建共享的公共陆地移动网、区域为所述第四区域，所述第七条件是从所述第四公共陆地移动网漫游至的公共陆地移动网、区域为所述第四区域。
  9. 根据权利要求3至8中任意一项所述的方法，其特征在于，所述终端从多个先验频点信息中选择至少一个目标先验频点信息包括：
    根据所述先验频点信息的优先级，从所述多个先验频点信息中选择至少一个所述目标先验频点信息。
  10. 根据权利要求9所述的方法，其特征在于，如果将所述目标先验频点信息添加至邻区配置，所述邻区配置中频点信息数量小于或等于预设数量。
  11. 根据权利要求3至8中任意一项所述的方法，其特征在于，所述终端从多个先验频点信息中选择至少一个目标先验频点信息包括：
    终端在确定满足预设条件时，从所述多个先验频点信息中选择至少一个所述目标先验频点信息，所述预设条件包括第一预设条件和/或第二预设条件；
    所述第一预设条件是邻区配置中网络设备配置的邻区频点信息的数量小于数量阈值，或者所述邻区配置中没有邻区频点信息；
    所述第二预设条件是所述当前接入的小区的信号质量小于第一阈值，且预设时间内没有切换到信号质量大于第二阈值的小区，所述第一阈值小于所述第二阈值。
  12. 根据权利要求3至8中任意一项所述的方法，其特征在于，所述方法还包括：
    根据终端成功驻留的多个频点的相关信息，得到每个频点的所述先验频点信息。
  13. 一种终端，其特征在于，所述终端包括：处理器和存储器；其中，所述存储器用于存储一个或多个计算机程序代码，所述计算机程序代码包括计算机指令，当所述处理器执行所述计算机指令时，所述处理器执行如权利要求1至12中任意一项所述的小区重选方法。
  14. 一种计算机存储介质，其特征在于，所述计算机存储介质包括计算机指令，当所述计算机指令在终端上运行时，使得所述终端执行如权利要求1至12中任意一项所述的小区重选方法。
  15. 一种小区重选方法，其特征在于，所述方法包括：
    终端从多个先验频点信息中选择至少一个目标先验频点信息，其中所述终端根据当前 注册的公共陆地移动网是否属于运营商共建共享的公共陆地移动网、和/或、是否可漫游至其他公共陆地移动网，从所述多个先验频点信息中选择至少一个所述目标先验频点信息，以使所述终端从运营商共建共享的公共陆地移动网的先验频点信息和/或可漫游至的其他公共陆地移动网的先验频点信息中，选择所述目标先验频点信息，所述先验频点信息是终端曾成功驻留的运营商的公共陆地移动网下小区的频点信息；
    根据所述目标先验频点信息进行测量和重选评估；
    根据重选评估的结果进行小区重选。
  16. 根据权利要求15所述的方法，其特征在于，所述目标先验频点信息添加到邻区配置中，所述邻区配置中有网络设备配置的邻区频点信息；
    所述根据所述目标先验频点信息进行测量和重选评估包括：根据所述邻区频点信息中的邻区频点进行测量，得到第一测量结果，根据所述邻区频点信息中的邻区重选配置对所述第一测量结果进行重选评估；
    根据所述目标先验频点信息中的先验频点进行测量，得到第二测量结果，根据所述目标先验频点中的先验重选配置对所述第二测量结果进行重选评估。
  17. 根据权利要求15所述的方法，其特征在于，所述终端从多个先验频点信息中选择至少一个目标先验频点信息包括：
    根据所述终端的使用场景，从所述多个先验频点信息中选择至少一个所述目标先验频点信息。
  18. 根据权利要求17所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择至少一个所述目标先验频点信息包括：
    根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息。
  19. 根据权利要求18所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：
    确定所述终端的使用场景为第一使用场景，在所述第一使用场景下所述终端注册在第一公共陆地移动网中且所述终端处于第一区域；
    从所述多个先验频点信息中选择与所述第一公共陆地移动网属于同一个运营商、区域为所述第一区域的目标先验频点。
  20. 根据权利要求18所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：
    确定所述终端的使用场景为第二使用场景，在所述第二使用场景下所述终端注册在第二公共陆地移动网中且所述终端处于第二区域；
    从所述多个先验频点信息中选择满足第一条件的目标先验频点信息以及满足第二条件的目标先验频点信息，所述第一条件是与所述第二公共陆地移动网属于同一个运营商、区域为所述第二区域，所述第二条件是所述第二公共陆地移动网所属运营商共建共享的公共陆地移动网、区域为所述第二区域。
  21. 根据权利要求18所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：
    确定所述终端的使用场景为第三使用场景，在所述第三使用场景下所述终端注册在第三公共陆地移动网中且所述终端处于第三区域；
    从所述多个先验频点信息中选择满足第三条件的目标先验频点信息以及满足第四条件的目标先验频点信息，所述第三条件是与所述第三公共陆地移动网属于同一个运营商、区域为所述第三区域，所述第四条件是从所述第三公共陆地移动网漫游至的公共陆地移动网、区域为所述第三区域。
  22. 根据权利要求18所述的方法，其特征在于，所述根据所述终端的使用场景，从所述多个先验频点信息中选择区域与终端所处区域相同的目标先验频点信息包括：
    确定所述终端的使用场景为第四使用场景，在所述第四使用场景下所述终端注册在第四公共陆地移动网中且所述终端处于第四区域；
    从所述多个先验频点信息中选择满足第五条件的目标先验频点信息、满足第六条件的目标先验频点信息以及满足第七条件的目标先验频点信息，所述第五条件是与所述第四公共陆地移动网属于同一个运营商、区域为所述第四区域，所述第六条件是所述第四公共陆地移动网所属运营商共建共享的公共陆地移动网、区域为所述第四区域，所述第七条件是从所述第四公共陆地移动网漫游至的公共陆地移动网、区域为所述第四区域。
  23. 根据权利要求17至22中任意一项所述的方法，其特征在于，所述终端从多个先验频点信息中选择至少一个目标先验频点信息包括：
    根据所述先验频点信息的优先级，从所述多个先验频点信息中选择至少一个所述目标先验频点信息。
  24. 根据权利要求23所述的方法，其特征在于，如果将所述目标先验频点信息添加至邻区配置，所述邻区配置中频点信息数量小于或等于预设数量。
  25. 根据权利要求17至22中任意一项所述的方法，其特征在于，所述终端从多个先验频点信息中选择至少一个目标先验频点信息包括：
    终端在确定满足预设条件时，从所述多个先验频点信息中选择至少一个所述目标先验频点信息，所述预设条件包括第一预设条件和/或第二预设条件；
    所述第一预设条件是邻区配置中网络设备配置的邻区频点信息的数量小于数量阈值，或者所述邻区配置中没有邻区频点信息；
    所述第二预设条件是当前接入的小区的信号质量小于第一阈值，且预设时间内没有切换到信号质量大于第二阈值的小区，所述第一阈值小于所述第二阈值。
  26. 根据权利要求17至22中任意一项所述的方法，其特征在于，所述方法还包括：
    根据终端成功驻留的多个频点的相关信息，得到每个频点的所述先验频点信息。
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