WO2013082932A1 - Lte网络的搜索方法和系统 - Google Patents

Lte网络的搜索方法和系统 Download PDF

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Publication number
WO2013082932A1
WO2013082932A1 PCT/CN2012/077296 CN2012077296W WO2013082932A1 WO 2013082932 A1 WO2013082932 A1 WO 2013082932A1 CN 2012077296 W CN2012077296 W CN 2012077296W WO 2013082932 A1 WO2013082932 A1 WO 2013082932A1
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Prior art keywords
lte network
terminal
exits
coverage
lte
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PCT/CN2012/077296
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English (en)
French (fr)
Inventor
仲华
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中兴通讯股份有限公司
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Publication of WO2013082932A1 publication Critical patent/WO2013082932A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information

Definitions

  • the present invention relates to the field of communications, and in particular to a search method and system for an LTE (Long-Term Evolution) network.
  • LTE Long-Term Evolution
  • SAE System Architecture Evolution
  • the operator may choose to upgrade only the MSC (Mobile Switching Center) of the 2G/3G network without upgrading the base station, thereby reducing investment.
  • the terminal may use the LTE network to complete the packet service, or may use the 2G/3G network to complete the circuit service.
  • the terminal does not have the neighbor cell information of the LTE network when the terminal is in the idle state.
  • the terminal needs to continuously search for the LTE network in a large range, thereby reducing the search success rate. , dramatically increased terminal power consumption.
  • the present invention provides a search method and system for an LTE network, so as to at least solve the problem in the prior art that a terminal continuously searches for an LTE network in a wide range without knowing the coverage of the LTE network.
  • a search method for an LTE network including: a terminal that exits an LTE network receives an LA (L OC ation Area) that is controlled by an MSC sent by an MSC after entering a network of another system.
  • LA L OC ation Area
  • the LTE network coverage information where the LTE network coverage information is used to indicate whether the LA that is governed supports the LTE network coverage; the terminal that exits the LTE network searches for the LTE network in the LA that supports the LTE network coverage according to the LTE network coverage information.
  • the foregoing LTE network search method includes: the terminal that exits the LTE network is in another standard network.
  • the MSC will save its saved LTE network overlay.
  • the cover information is sent to the terminal that exits the LTE network; and/or the MSC sends the saved LTE network coverage information to the end of the LTE network in the process of the CS network exiting the LTE network in other standard networks.
  • the step of the terminal exiting the LTE network searching for the LTE network in the LA supporting the LTE network coverage according to the LTE network coverage information includes: acquiring the LAI (Location Area Identifier) in the LTE network coverage information by the terminal exiting the LTE network.
  • the LAI is used to indicate the LA that supports the LTE network coverage; whether the LA in which the terminal that exits the LTE network is located according to the acquired LAI determines whether the LTE network coverage is supported; if the LTE network coverage is supported, the terminal that exits the LTE network exits the LTE network.
  • the LA in which the terminal is located searches for the LTE network.
  • the search method of the LTE network further includes: if it is determined that the LA where the terminal exiting the LTE network does not support the LTE network If the coverage is complete, the terminal that exits the LTE network searches for the LTE network in the LA that supports the LTE network coverage and is adjacent to the LA where the terminal that exits the LTE network is located.
  • the step of searching for the LTE network in the LA supporting the LTE network coverage according to the LTE network coverage information comprises: searching for the LTE network in the LA supporting the LTE network coverage according to the LTE network coverage information when the terminal exiting the LTE network is in the idle state; If the LTE network cell is searched, the terminal that exits the LTE network determines whether it needs to access the searched LTE network. If it is determined that the searched LTE network needs to be accessed, the terminal that exits the LTE network accesses the searched LTE network.
  • the LTE network coverage information is further used to indicate whether the cell on the governed LA supports LTE network coverage.
  • a search system for an LTE network including: a terminal, where the terminal includes: a receiving unit, configured to receive an MSC after entering a network of another standard after the terminal exits from the LTE network.
  • the LTE network coverage information of the LA that is managed by the MSC, where the LTE network coverage information is used to indicate whether the LA under the control supports the LTE network coverage; and the search unit is configured to be in the LA supporting the LTE network coverage according to the LTE network coverage information. Search for LTE networks.
  • the LTE network search system includes: an MSC, where the MSC includes: a first sending unit, configured to cover the LTE network saved by the MSC in the process of performing location update on the network of the other system in the terminal exiting the LTE network.
  • the information is sent to the terminal that exits the LTE network; and/or the second sending unit is configured to send the LTE network coverage information saved by the MSC to the LTE network during the process of performing the CS service on the network of the other standard network. Terminal.
  • the search unit includes: an obtaining module, configured to acquire an LAL in the LTE network coverage information, where the LAI is used to indicate an LA that supports the coverage of the LTE network; and the first determining module is configured to determine to exit the terminal of the LTE network according to the acquired LAI. Whether the LA in the network supports the LTE network coverage; the first search module is configured to search for the LTE network in the LA where the terminal that exits the LTE network is located after determining that the LA where the terminal that exits the LTE network supports the LTE network coverage.
  • the first search module is further configured to, after determining that the LA where the terminal exiting the LTE network does not support the LTE network coverage, adjacent to the LA that supports the LTE network coverage and is located at the terminal that exits the LTE network.
  • Search for LTE networks in LA the search unit includes: a second search module, configured to search for an LTE network in an LA supporting LTE network coverage according to the LTE network coverage information when the terminal exiting the LTE network is in an idle state; the second determining module is configured to be in After the LTE network is searched, it is determined whether the searched LTE network needs to be accessed.
  • the processing module is configured to: after determining that the searched LTE network needs to be accessed, the terminal that exits the LTE network accesses the searched LTE network.
  • the terminal that exits the LTE network receives the LTE network coverage information of the LA under the MSC that is transmitted by the MSC mobile switching center, and learns the coverage of the LTE network, and searches for the LTE in the LA that supports the LTE network coverage.
  • the network solves the problem that the terminal continuously searches for the LTE network in a wide range without knowing the coverage of the LTE network in the prior art, thereby improving the search success rate and reducing the power consumption of the terminal.
  • FIG. 1 is a preferred structural diagram of a search system for an LTE network according to an embodiment of the present invention
  • FIG. 2 is another preferred structural diagram of a search system for an LTE network according to an embodiment of the present invention
  • 3 is a preferred structural diagram of a search unit according to an embodiment of the present invention
  • FIG. 4 is another preferred structural diagram of a search unit according to an embodiment of the present invention.
  • FIG. 5 is an LTE network according to an embodiment of the present invention.
  • a preferred flowchart of a search method FIG. 6 is another preferred flowchart of a search method of an LTE network according to an embodiment of the present invention
  • FIG. 7 is still another preferred flowchart of a search method of an LTE network according to an embodiment of the present invention.
  • the search system of the LTE network includes: a terminal 102, where the terminal 102 includes: a receiving unit 1021.
  • the terminal 102 includes: a receiving unit 1021.
  • Set after the terminal exits from the LTE network, enter the network of the other system and receive the LTE network coverage information of the LA that is controlled by the MSC, where the LTE network coverage information is used to indicate whether the LA that the jurisdiction supports the LTE network.
  • the search unit 1022 is in communication with the receiving unit 1021, and is configured to search for an LTE network in an LA supporting LTE network coverage according to the LTE network coverage information.
  • the network of the other systems mentioned above refers to: a network different from the LTE network, for example, including: a TD-SCDMA network, a WCDMA network, a CDMA2000 network, or a GSM network.
  • the terminal that exits the LTE network enters the network of another system and receives the LA (Location Area) under the jurisdiction of the MSC sent by the MSC mobile switching center.
  • LA Location Area
  • LTE network coverage information knowing the coverage of the LTE network, and searching for the LTE network in the LA supporting the coverage of the LTE network, and solving the problem in the prior art that the terminal is widely distributed without knowing the coverage of the LTE network.
  • the foregoing terminal that exits the LTE network may be a terminal that reselects to a cell in another standard network in an idle state or reselects to a cell in another standard network after the LTE network coverage is lost, or may be in a CS service process.
  • a terminal that accesses a cell in another standard network refers to: a network different from the LTE network, for example, including: a TD-SCDMA network, a WCDMA network, a CDMA2000 network, or a GSM network.
  • the LTE network coverage information may also indicate whether the cell on the governed LA supports LTE network coverage.
  • the LTE network coverage information is accurate to the cell, so that the terminal that exits the LTE network can be more accurately indicated to perform LTE network search, and the terminal that exits the LTE network can support the LTE network.
  • the LTE network is searched in the covered cell, thereby shortening the time required for searching for the LTE network, saving resources required for searching for the LTE network, and improving the search success rate.
  • the search system of the LTE network is further improved. As shown in FIG.
  • the LTE network search system includes: an MSC 202, where
  • the MSC 202 includes: a first sending unit 2021, configured to: when the terminal that exits the LTE network performs location update in the network of another system, send the LTE network coverage information saved by the MSC to the terminal that exits the LTE network; and/or
  • the second sending unit 2022 is configured to send the LTE network coverage information saved by the MSC to the terminal that exits the LTE network, in the process of performing the CS service in the network of the other system in the terminal of the LTE network.
  • the MSC 202 sends the LTE network coverage information to the terminal that exits the LTE network in different scenarios, so that the terminal that exits the LTE network obtains real-time and effective LTE network coverage information, and improves the terminal search of the LTE network.
  • the success rate enhances the flexibility of this embodiment.
  • the network of the other systems mentioned above includes a network different from the LTE network, for example, including: a TD-SCDMA network, a WCDMA network, a CDMA2000 network, or a GSM network.
  • a preferred search unit 1022 is provided.
  • the search unit 1022 includes: 302.
  • the first determining module 304 is configured to communicate with the obtaining module 302, and is configured to exit the terminal of the LTE network according to the obtained LAI. Whether the LA at the location supports the LTE network coverage; the first search module 306, in communication with the first determining module 304, is configured to exit the LTE network terminal after determining that the LA where the terminal exiting the LTE network supports the LTE network coverage Search for the LTE network in the LA.
  • whether the LA in which the terminal that exits the LTE network supports the LTE network coverage is determined according to the LAI (Location Area Identifier) of the LA that supports the coverage of the LTE network. If supported, the LTE network is preferentially logged out.
  • the LA in which the terminal is located searches for the LTE network, so that the terminal that exits the LTE network can quickly perform the operation of searching for the LTE network, and shortens the time required for the terminal exiting the LTE network to determine the LA for performing the LTE network search.
  • the first search module 306 may further select the LA that is in the LTE network coverage and is located in the terminal that exits the LTE network.
  • the LTE network is searched for in the LA to ensure that the terminal that exits the LTE network can search for the LTE network in the LA that supports the LTE network coverage, thereby improving the search success rate.
  • the search unit 1022 is further improved. As shown in FIG. 4, the search unit 1022 includes: a second search module. 402. Set, when the terminal that exits the LTE network is in an idle state, according to the LTE network coverage information.
  • the second determining module 404 in communication with the second search module 402, is configured to determine whether the searched LTE network needs to be accessed after searching the LTE network; the processing module 406, The second judging module 404 is configured to: after determining that the searched LTE network needs to be accessed, accessing the terminal that exits the LTE network to the searched LTE network.
  • the terminal that is in the idle state can select whether to access the searched LTE network according to the requirement, thereby satisfying different requirements of the terminal, and enhancing the practicality of the embodiment.
  • the preferred embodiment provides a preferred LTE network search method.
  • the LTE network search method includes: S502: The terminal exiting the LTE network is in the After entering the network of the other system, the LTE network coverage information of the LA that is controlled by the MSC sent by the MSC is received, where the LTE network coverage information is used to indicate whether the LA that the jurisdiction supports the LTE network coverage;
  • the terminal that exits the LTE network searches for the LTE network in the LA that supports the coverage of the LTE network according to the LTE network coverage information.
  • the network of the other systems mentioned above refers to: a network different from the LTE network, for example, including: a TD-SCDMA network, a WCDMA network, a CDMA2000 network, or a GSM network.
  • the terminal that exits the LTE network receives the LTE network coverage information of the LA that is controlled by the MSC after receiving the network of the other system, and learns the coverage of the LTE network, and specifically supports the LTE network.
  • the LTE network is searched in the coverage LA, which solves the problem that the terminal continuously searches for the LTE network in a wide range without knowing the coverage of the LTE network in the prior art, thereby improving the search success rate and shortening the time required for searching the LTE network. , reducing the power consumption of the terminal.
  • the foregoing terminal that exits the LTE network may be a terminal that reselects to a cell in another standard network in an idle state or reselects to a cell in another standard network after the LTE network coverage is lost, or may be in a CS service process.
  • the network of the above other systems includes a network different from the LTE network, for example, including: a TD-SCDMA network, a WCDMA network, a CDMA2000 network, or a GSM network.
  • the LTE network coverage information may further indicate whether the cell on the governed LA supports LTE network coverage.
  • the LTE network coverage information is accurate to the cell, so that the terminal that exits the LTE network can perform the LTE network search more accurately, and the terminal that exits the LTE network can support the LTE network coverage.
  • Searching for LTE networks in the area shortens the time required to search for LTE networks, saves resources needed to search for LTE networks, and improves search success rate.
  • the flexibility of the embodiment is enhanced.
  • the search method of the LTE network is further improved, so that the terminal that exits the LTE network obtains real-time, Effective LTE network coverage information.
  • the foregoing LTE network search method includes: before the terminal that exits the LTE network receives the LTE network coverage information of the LA that is controlled by the MSC, and the terminal that exits the LTE network performs location update in the network of another system, The MSC sends the saved LTE network coverage information to the terminal that exits the LTE network; and/or the MSC sends the saved LTE network coverage information to the quit network in the process of performing the CS service on the network of the other system in the LTE network.
  • the terminal of the LTE network includes: before the terminal that exits the LTE network receives the LTE network coverage information of the LA that is controlled by the MSC, and the terminal that exits the LTE network performs location update in the network of another system.
  • the MSC sends the saved LTE network coverage information to the terminal that exits the LTE network; and/or the MSC sends the saved LTE network coverage information to the quit network in the process of performing the CS service on the network of the other system in the LTE network.
  • the MSC sends the LTE network coverage information to the terminal that exits the LTE network in different scenarios, so that the terminal that exits the LTE network obtains the real-time and effective LTE network coverage information, and improves the terminal search success of the LTE network.
  • the rate enhances the flexibility of this embodiment.
  • the network of the other systems mentioned above refers to a network different from the LTE network, for example, including: a TD-SCDMA network, a WCDMA network, a CDMA2000 network, or a GSM network.
  • a preferred terminal that exits the LTE network is provided in the LA supporting the LTE network coverage according to the LTE network coverage information.
  • a method of searching for an LTE network so that a terminal exiting the LTE network can quickly perform an operation of searching for an LTE network.
  • the method for the terminal that exits the LTE network to search for the LTE network in the LA that supports the LTE network coverage according to the LTE network coverage information includes: the terminal that exits the LTE network acquires the LAL in the LTE network coverage information, where the LAI is used to indicate that the LTE is supported.
  • the LA of the network coverage determines whether the LA in which the terminal exiting the LTE network supports the LTE network coverage according to the acquired LAI; if the LTE network coverage is supported, the terminal that exits the LTE network searches for the LTE in the LA where the terminal that exits the LTE network is located.
  • the internet The internet.
  • whether the LA in which the terminal that exits the LTE network supports the LTE network coverage is determined according to the LAI of the LA that supports the coverage of the LTE network. If supported, the LTE network is preferentially searched for in the LA where the terminal that exits the LTE network is located.
  • the terminal that exits the LTE network can quickly perform the operation of searching for the LTE network, and shortens the time required for the terminal exiting the LTE network to determine the LA for performing the LTE network search.
  • the terminal that exits the LTE network may also select the LTE network coverage and exit.
  • the LA adjacent to the LA in which the terminal of the LTE network is located searches for the LTE network, so that the terminal that exits the LTE network can search for the LTE network in the LA that supports the LTE network coverage, thereby improving the search success rate.
  • the utility of the embodiment is enhanced.
  • the terminal that exits the LTE network searches for the LTE network in the LA that supports the coverage of the LTE network according to the LTE network coverage information.
  • the method has been further improved to meet the different needs of the terminal.
  • the method for the LTE network to search for the LTE network in the LA that supports the LTE network coverage according to the LTE network coverage information includes: searching for the LTE network in the LA supporting the LTE network coverage according to the LTE network coverage information includes: When the terminal that exits the LTE network is in the idle state, the LTE network is searched for in the LA that supports the LTE network coverage according to the LTE network coverage information; if the LTE network is searched, the terminal that exits the LTE network determines whether it needs to access the searched LTE network; If it is determined that the searched LTE network needs to be accessed, the terminal that exits the LTE network accesses the searched LTE network.
  • the terminal that is in the idle state can select whether to access the searched LTE network according to the requirement, thereby satisfying the different requirements of the terminal, and enhancing the practicality of the embodiment.
  • the preferred embodiment provides another preferred method for the LTE network search method. As shown in FIG. 6, the LTE network search method includes:
  • S602 The terminal is normally camped on the LTE network to measure other radio access technologies. In this case, the general LTE base station information broadcasts the neighbor information of the different system.
  • S604 The terminal reselects to other standard cells in the idle state. Or re-selecting the LTE network coverage and reselecting to other standard cells (equivalent to the terminal exiting the LTE network);
  • S608 The MSC saves the information of the LTE network coverage corresponding to the cell in the LA that is in the jurisdiction, and indicates whether the LA corresponding to the LAI has the LTE network coverage in the location update process, and the indicated information may be accurate to the cell; S610: After the terminal returns to the idle state, Searching for an LTE network in an LA or a cell corresponding to the LAI indicating the presence of the LTE network coverage;
  • the terminal may decide to search for the LTE network neighboring cell or search for the LTE network neighboring cell in a longer period according to the related setting, where the related setting includes a period of searching and searching;
  • S614 Whether the terminal changes in the location area in the idle state. If the location area changes in the idle state, steps S606-S612 are repeated. If the terminal initiates the CS service, if a handover occurs in the CS service process, the handover message is saved according to the MSC.
  • the coverage information of the LTE network corresponding to the cell in the LA that it is responsible for indicates whether the LA has LTE network coverage, and the LTE network coverage information may be detailed to the cell level.
  • the terminal determines whether to search for the LTE network cell according to whether the LA is in the LTE network cell coverage, if the location area change does not occur in the idle state, then go to step S616;
  • step S616 If the terminal searches for the LTE network cell in the idle state, it determines whether it needs to camp to the searched LTE network cell according to the cell reselection procedure. Once the terminal reselects the searched LTE network cell, the terminal initiates the joint routing area update. , step S602 is performed.
  • the MSC has an SGs interface with the MME (Mobile Management Entity), and the MSC saves the LA corresponding to the coverage of the MSC.
  • MME Mobile Management Entity
  • the terminal may notify the terminal in which location area has LTE network coverage during the location update process or the CS service process, and may indicate to the cell level, and the terminal enters the corresponding LA or cell search LTE wireless network in the idle state.
  • the implementation terminal can search for the LTE network in a targeted manner, and does not need to open the LTE network cell search in the cells of other systems that do not indicate the LTE cell information, thereby reducing the power consumption of the terminal, and the operator does not need to upgrade other standards.
  • the base station of the network informs the terminal of the LTE network cell information in the network of other standards, thereby reducing the upgrade cost.
  • the preferred embodiment further provides a preferred method for the LTE network search method. As shown in FIG. 7, the LTE network search method includes:
  • S702 The terminal is normally camped on the LTE network to measure other radio access technologies.
  • the general LTE base station information broadcasts the neighbor information of the different system.
  • S704 The terminal needs to perform a CS service, and completes a CS-Fallback process in the LTE network.
  • S706 After the terminal completes the CS-Fallback process, the terminal enters another standard cell for the CS service.
  • the LTE network coverage information corresponding to the cell in the LA that is controlled by the MSC is used in the handover message to indicate whether the LA has LTE network coverage, and the LTE network coverage information may be detailed. To the cell level, if no handover occurs, the LTE network coverage is supported by default;
  • S712 If the corresponding LA or the cell does not support the LTE network coverage, the terminal may search or not search for the LTE network cell in a longer period. If the corresponding LA or the cell supports the LTE network coverage, the terminal starts searching for the LTE network cell.
  • S714 Whether the location area change occurs in the terminal, if the location area change occurs, repeat steps S606-S612 in FIG. 6, if the location area change does not occur, then go to step S716;
  • the terminal may notify the terminal in which location area has LTE network coverage during the location update process or the CS service process, and may indicate to the cell level, and the terminal enters the corresponding LA or cell search LTE wireless network in the idle state.
  • the implementation terminal can search for the LTE network in a targeted manner, and does not need to open the LTE network cell search in the cells of other systems that do not indicate the LTE cell information, thereby reducing the power consumption of the terminal, and the operator does not need to upgrade other standards.
  • the base station informs the terminal of the LTE network cell information in the network of other standards, thereby reducing the upgrade cost.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.

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Abstract

本发明提供了一种LTE网络的搜索方法和系统,其中,该方法包括:退出LTE网络的终端在进入其他制式的网络后接收MSC移动交换中心发送的MSC所管辖的LA的LTE网络覆盖信息,其中,LTE网络覆盖信息用于指示所管辖的LA是否支持LTE网络覆盖;退出LTE网络的终端根据LTE网络覆盖信息在支持LTE网络覆盖的LA中搜索LTE网络。本发明解决了现有技术中的在不知道LTE网络覆盖情况时终端大范围不断地搜索LTE网络的问题,从而提高了搜索成功率,减少了终端的耗电量。

Description

LTE网络的搜索方法和系统 技术领域 本发明涉及通信领域, 具体而言, 涉及一种 LTE (Long-Term Evolution, 长期演 进) 网络的搜索方法和系统。 背景技术 在 LTE (Long-Term Evolution, 长期演进) 网络部署初期, 出于对传统移动网络 投资的保护和对 LTE/SAE ( System Architecture Evolution, 系统架构演进)网络的部署 策略的考虑, 在 LTE/SAE投入运营的阶段, 部分运营商希望仍然使用 2G或 3G无线 网络来提供 CS (Circuit Switch, 电路交换) 话音业务。 所以 CS Fallback ( CS语音回 退业务) 技术用于将驻扎在 LTE网络中的用户切换到 CS网络中以完成 CS业务的处 理过程。在这种情况下,运营商可能选择只升级 2G/3G网络的 MSC (Mobile Switching Center, 移动交换中心), 而不升级基站, 从而减少投资。 在上述 LTE网络覆盖情况下, 终端可以使用 LTE网络完成分组业务, 也可以使用 2G/3G网络完成电路业务。 但是, 在终端进入 2G/3G网络时, 终端处于空闲态时没有 LTE网络的邻小区信息, 在不知道 LTE网络覆盖情况时, 终端需要大范围不断地搜索 LTE网络, 因此导致降低了搜索成功率, 急剧增加了终端耗电量。 发明内容 本发明提供了一种 LTE网络的搜索方法和系统, 以至少解决现有技术中的在不知 道 LTE网络覆盖情况时终端大范围不断地搜索 LTE网络的问题。 根据本发明的一个方面, 提供了一种 LTE网络的搜索方法, 其包括: 退出 LTE网 络的终端在进入其他制式的网络后接收 MSC发送的 MSC所管辖的 LA(LOCation Area, 位置区) 的 LTE网络覆盖信息, 其中, LTE网络覆盖信息用于指示所管辖的 LA是否 支持 LTE网络覆盖; 退出 LTE网络的终端根据 LTE网络覆盖信息在支持 LTE网络覆 盖的 LA中搜索 LTE网络。 优选地,退出 LTE网络的终端在进入其他制式的网络后接收 MSC发送的 MSC所 管辖的 LA的 LTE网络覆盖信息之前, 上述 LTE网络的搜索方法包括: 在退出 LTE 网络的终端在其他制式的网络进行位置更新的过程中, MSC将其保存的 LTE 网络覆 盖信息发送给退出 LTE网络的终端; 和 /或在退出 LTE网络的终端在其他制式的网络 进行 CS业务的过程中, MSC将其保存的 LTE网络覆盖信息发送给退出 LTE网络的终
优选地,退出 LTE网络的终端根据 LTE网络覆盖信息在支持 LTE网络覆盖的 LA 中搜索 LTE网络的步骤包括: 退出 LTE网络的终端获取 LTE网络覆盖信息中的 LAI (Location Area Identifier, 位置区标识), 其中, LAI用于指示支持 LTE网络覆盖的 LA; 根据获取的 LAI判断退出 LTE网络的终端所处的 LA是否支持 LTE网络覆盖; 若支持 LTE网络覆盖,则退出 LTE网络的终端在退出 LTE网络的终端所处的 LA中搜 索 LTE网络。 优选地,在根据获取的 LAI判断退出 LTE网络的终端所处的 LA是否支持 LTE网 络覆盖之后, 上述 LTE网络的搜索方法还包括: 若判断出退出 LTE网络的终端所处的 LA不支持 LTE网络覆盖, 则退出 LTE网络的终端在支持 LTE网络覆盖的、 且与退出 LTE网络的终端所处的 LA相邻的 LA中搜索 LTE网络。 优选地,根据 LTE网络覆盖信息在支持 LTE网络覆盖的 LA中搜索 LTE网络的步 骤包括: 退出 LTE网络的终端在空闲态时, 根据 LTE网络覆盖信息在支持 LTE网络 覆盖的 LA中搜索 LTE网络;若搜索到 LTE网络小区,退出 LTE网络的终端判断是否 需要接入搜索到的 LTE网络; 若判断出需要接入搜索到的 LTE网络, 则退出 LTE网 络的终端接入到搜索到的 LTE网络。 优选地, LTE网络覆盖信息进一步用于指示所管辖的 LA上的小区是否支持 LTE 网络覆盖。 根据本发明的另一方面, 提供了一种 LTE网络的搜索系统, 其包括: 终端, 其中, 终端包括: 接收单元, 设置为在终端从 LTE网络退出后, 在进入其他制式的网络后接 收 MSC发送的 MSC所管辖的 LA的 LTE网络覆盖信息, 其中, LTE网络覆盖信息用 于指示所管辖的 LA是否支持 LTE网络覆盖; 搜索单元, 设置为根据 LTE网络覆盖信 息在支持 LTE网络覆盖的 LA中搜索 LTE网络。 优选地, 上述 LTE网络的搜索系统包括: MSC, 其中, MSC包括: 第一发送单 元,设置为在退出 LTE网络的终端在其他制式的网络进行位置更新的过程中,将 MSC 保存的 LTE网络覆盖信息发送给退出 LTE网络的终端; 和 /或第二发送单元, 设置为 在退出 LTE网络的终端在其他制式的网络进行 CS业务的过程中,将 MSC保存的 LTE 网络覆盖信息发送给退出 LTE网络的终端。 优选地, 搜索单元包括: 获取模块, 设置为获取 LTE网络覆盖信息中的 LAL 其 中, LAI用于指示支持 LTE网络覆盖的 LA; 第一判断模块, 设置为根据获取的 LAI 判断退出 LTE网络的终端所处的 LA是否支持 LTE网络覆盖; 第一搜索模块, 设置为 在判断出退出 LTE网络的终端所处的 LA支持 LTE网络覆盖后,在退出 LTE网络的终 端所处的 LA中搜索 LTE网络。 优选地, 第一搜索模块还设置为在判断出退出 LTE网络的终端所处的 LA不支持 LTE网络覆盖后, 在支持 LTE网络覆盖的、 且与退出 LTE网络的终端所处的 LA相邻 的 LA中搜索 LTE网络。 优选地, 搜索单元包括: 第二搜索模块, 设置为在退出 LTE网络的终端处于空闲 态时,根据 LTE网络覆盖信息在支持 LTE网络覆盖的 LA中搜索 LTE网络;第二判断 模块,设置为在搜索到 LTE网络后,判断是否需要接入搜索到的 LTE网络;处理模块, 设置为在判断出需要接入搜索到的 LTE网络后,将退出 LTE网络的终端接入到搜索到 的 LTE网络。 在本发明中,退出 LTE网络的终端通过接收 MSC移动交换中心发送的 MSC所管 辖的 LA的 LTE网络覆盖信息,得知 LTE网络覆盖情况,有针对性地在支持 LTE网络 覆盖的 LA中搜索 LTE网络,解决了现有技术中的在不知道 LTE网络覆盖情况时终端 大范围不断地搜索 LTE网络的问题, 从而提高了搜索成功率, 减少了终端的耗电量。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中: 图 1是根据本发明实施例的 LTE网络的搜索系统的一种优选的结构图; 图 2是根据本发明实施例的 LTE网络的搜索系统的另一种优选的结构图; 图 3是根据本发明实施例的搜索单元的一种优选的结构图; 图 4是根据本发明实施例的搜索单元的另一种优选的结构图; 图 5是根据本发明实施例的 LTE网络的搜索方法的一种优选的流程图; 图 6是根据本发明实施例的 LTE网络的搜索方法的另一种优选的流程图; 图 7是根据本发明实施例的 LTE网络的搜索方法的又一种优选的流程图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 在以下各个实施例中, 通信可以由无线连接或有线连接或其两者的组合来实现, 本发明对此不做限定。 实施例 1 图 1是根据本发明实施例的 LTE网络的搜索系统的一种优选的结构图, 如图 1所 示, 该 LTE网络的搜索系统包括: 终端 102, 其中, 终端 102包括: 接收单元 1021, 设置为在终端从 LTE网络退出后,进入其他制式的网络并接收 MSC发送的 MSC所管 辖的 LA的 LTE网络覆盖信息, 其中, LTE网络覆盖信息用于指示所管辖的 LA是否 支持 LTE网络覆盖; 搜索单元 1022, 与接收单元 1021通信, 设置为根据 LTE网络覆 盖信息在支持 LTE网络覆盖的 LA中搜索 LTE网络。优选的, 上述其他制式的网络是 指: 与 LTE网络不同制式的网络, 例如, 包括: TD-SCDMA网络、 WCDMA网络、 CDMA2000网络或者 GSM网络。 为了提高搜索成功率, 减少终端的耗电量, 在本优选实施例中, 退出 LTE网络的 终端进入其他制式的网络后通过接收 MSC 移动交换中心发送的 MSC 所管辖的 LA (Location Area, 位置区) 的 LTE网络覆盖信息, 得知 LTE网络覆盖情况, 有针对性 地在支持 LTE网络覆盖的 LA中搜索 LTE网络, 解决了现有技术中的在不知道 LTE 网络覆盖情况时终端大范围不断地搜索 LTE网络的问题, 从而提高了搜索成功率, 减 少了终端的耗电量。 上述退出 LTE网络的终端可以是在空闲态下重选至其他制式网络中的小区的终端 或丢失 LTE网络覆盖后重选至其他制式网络中的小区的终端, 也可以是在进行 CS业 务过程中接入到其他制式网络中的小区的终端。 优选的, 上述其他制式的网络是指: 与 LTE网络不同制式的网络,例如,包括: TD-SCDMA网络、 WCDMA网络、 CDMA2000 网络或者 GSM网络。 优选地, LTE网络覆盖信息还可以指示所管辖的 LA上的小区是否支持 LTE网络 覆盖。 在本优选的实施例中, LTE网络覆盖信息精确到小区, 使得可以更精确地指示 退出 LTE网络的终端进行 LTE网络搜索, 退出 LTE网络的终端可以在支持 LTE网络 覆盖的小区中搜索 LTE网络, 从而缩短了搜索 LTE网络所需的时间,节约了搜索 LTE 网络所需的资源, 提高了搜索成功率。 为了提高退出 LTE网络的终端搜索的成功率, 在本优选实施例中,对上述 LTE网 络的搜索系统做了进一步的改进,如图 2所示,该 LTE网络的搜索系统包括: MSC 202, 其中, MSC 202包括: 第一发送单元 2021, 设置为在退出 LTE网络的终端在其他制 式的网络进行位置更新的过程中, 将 MSC保存的 LTE网络覆盖信息发送给退出 LTE 网络的终端; 和 /或第二发送单元 2022, 设置为在退出 LTE网络的终端在其他制式的 网络进行 CS业务的过程中, 将 MSC保存的 LTE网络覆盖信息发送给退出 LTE网络 的终端。在本优选实施例中, MSC 202在不同场景下向退出 LTE网络的终端发送 LTE 网络覆盖信息, 以便退出 LTE网络的终端获得实时的、有效的 LTE网络覆盖信息, 提 高了退出 LTE网络的终端搜索的成功率, 增强了本实施例的灵活性。 优选的, 上述其 他制式的网络包括与 LTE 网络不同制式的网络, 例如, 包括: TD-SCDMA 网络、 WCDMA网络、 CDMA2000网络或者 GSM网络。 为了缩短退出 LTE网络的终端确定进行 LTE网络搜索的 LA所需的时间,在本优 选实施例中, 提供了一种优选的搜索单元 1022, 如图 3所示, 该搜索单元 1022包括: 获取模块 302,设置为获取 LTE网络覆盖信息中的 LAL其中, LAI用于指示支持 LTE 网络覆盖的 LA; 第一判断模块 304, 与获取模块 302通信, 设置为根据获取的 LAI 判断退出 LTE网络的终端所处的 LA是否支持 LTE网络覆盖; 第一搜索模块 306, 与 第一判断模块 304通信,设置为在判断出退出 LTE网络的终端所处的 LA支持 LTE网 络覆盖后, 在退出 LTE网络的终端所处的 LA中搜索 LTE网络。 在本优选实施例中, 根据支持 LTE网络覆盖的 LA的 LAI (Location Area Identifier, 位置区标识) 判断退 出 LTE网络的终端所处的 LA是否支持 LTE网络覆盖, 若支持, 则优先在退出 LTE 网络的终端所处的 LA中搜索 LTE网络, 以便退出 LTE网络的终端能够迅速地进行搜 索 LTE网络的操作,缩短了退出 LTE网络的终端确定进行 LTE网络搜索的 LA所需的 时间。 进一步地, 在判断出退出 LTE网络的终端所处的 LA不支持 LTE网络覆盖后, 第 一搜索模块 306还可以选择在支持 LTE网络覆盖的、且与退出 LTE网络的终端所处的 LA相邻的 LA中搜索 LTE网络, 以保证退出 LTE网络的终端可以在支持 LTE网络覆 盖的 LA中搜索 LTE网络, 提高了搜索成功率。 为了满足终端的不同需求, 增强本实施例的实用性, 在本优选实施例中, 还对上 述搜索单元 1022做了进一步的改进, 如图 4所示, 该搜索单元 1022包括: 第二搜索 模块 402, 设置为在退出 LTE网络的终端处于空闲态时, 根据 LTE网络覆盖信息在支 持 LTE网络覆盖的 LA中搜索 LTE网络; 第二判断模块 404, 与第二搜索模块 402通 信, 设置为在搜索到 LTE网络后, 判断是否需要接入搜索到的 LTE网络; 处理模块 406, 与第二判断模块 404通信, 设置为在判断出需要接入搜索到的 LTE网络后, 将 退出 LTE网络的终端接入到搜索到的 LTE网络。 在本实施例中, 处于空闲态的退出 LTE网络的终端在搜索到 LTE网络后,可以根据需要选择是否接入搜索到的 LTE网络, 从而满足了终端的不同需求, 增强了本实施例的实用性。 实施例 2 在图 1-4的基础上, 本优选实施例提供了一种优选的 LTE网络的搜索方法, 如图 5所示, 该 LTE网络的搜索方法包括: S502:退出 LTE网络的终端在进入其他制式的网络后接收 MSC发送的 MSC所管 辖的 LA的 LTE网络覆盖信息, 其中, LTE网络覆盖信息用于指示所管辖的 LA是否 支持 LTE网络覆盖;
S504: 退出 LTE网络的终端根据 LTE网络覆盖信息在支持 LTE网络覆盖的 LA 中搜索 LTE网络。 优选的, 上述其他制式的网络是指: 与 LTE网络不同制式的网络, 例如, 包括: TD-SCDMA网络、 WCDMA网络、 CDMA2000网络或者 GSM网络。 在上述优选实施例中, 退出 LTE 网络的终端在进入其他制式的网络后通过接收 MSC发送的 MSC所管辖的 LA的 LTE网络覆盖信息, 得知 LTE网络覆盖情况, 有针 对性地在支持 LTE网络覆盖的 LA中搜索 LTE网络,解决了现有技术中的在不知道 LTE 网络覆盖情况时终端大范围不断地搜索 LTE网络的问题, 从而提高了搜索成功率, 缩 短了搜索 LTE网络所需的时间, 减少了终端的耗电量。 上述退出 LTE网络的终端可以是在空闲态下重选至其他制式网络中的小区的终端 或丢失 LTE网络覆盖后重选至其他制式网络中的小区的终端, 也可以是在进行 CS业 务过程中接入到其他制式网络中的小区的终端。 优选的, 上述其他制式的网络包括与 LTE网络不同制式的网络,例如,包括: TD-SCDMA网络、 WCDMA网络、 CDMA2000 网络或者 GSM网络。 为了节约搜索 LTE网络所需的资源, 提高搜索成功率, 在本优选实施例中, LTE 网络覆盖信息可以进一步地指示所管辖的 LA上的小区是否支持 LTE网络覆盖。 在本 优选的实施例中, LTE网络覆盖信息精确到小区, 使得可以更精确地指示出退出 LTE 网络的终端进行 LTE网络搜索, 退出 LTE网络的终端可以在支持 LTE网络覆盖的小 区中搜索 LTE网络, 从而缩短了搜索 LTE网络所需的时间, 节约了搜索 LTE网络所 需的资源, 提高了搜索成功率。 为了提高退出 LTE网络的终端搜索的成功率, 增强本实施例的灵活性, 在本优选 实施例中,对上述 LTE网络的搜索方法做了进一步的改进, 以便退出 LTE网络的终端 获得实时的、 有效的 LTE网络覆盖信息。 具体地, 上述 LTE网络的搜索方法包括: 退 出 LTE网络的终端接收 MSC发送的 MSC所管辖的 LA的 LTE网络覆盖信息之前,在 退出 LTE网络的终端在其他制式的网络进行位置更新的过程中, MSC将其保存的 LTE 网络覆盖信息发送给退出 LTE网络的终端; 和 /或在退出 LTE网络的终端在其他制式 的网络进行 CS业务的过程中, MSC将其保存的 LTE网络覆盖信息发送给退出 LTE 网络的终端。 在本实施例中, MSC在不同场景下向退出 LTE网络的终端发送 LTE网 络覆盖信息, 以便退出 LTE网络的终端获得实时的、有效的 LTE网络覆盖信息, 提高 了退出 LTE网络的终端搜索的成功率, 增强了本实施例的灵活性。 优选的, 上述其他 制式的网络是指:与 LTE网络不同制式的网络,例如,包括: TD-SCDMA网络、 WCDMA 网络、 CDMA2000网络或者 GSM网络。 为了缩短退出 LTE网络的终端确定进行 LTE网络搜索的 LA所需的时间,在本优 选实施例中, 提供了一种优选的退出 LTE网络的终端根据 LTE网络覆盖信息在支持 LTE网络覆盖的 LA中搜索 LTE网络的方法, 以便退出 LTE网络的终端能够迅速地进 行搜索 LTE网络的操作。 具体地, 上述退出 LTE网络的终端根据 LTE网络覆盖信息 在支持 LTE网络覆盖的 LA中搜索 LTE网络的方法包括: 退出 LTE网络的终端获取 LTE网络覆盖信息中的 LAL 其中, LAI用于指示支持 LTE网络覆盖的 LA; 根据获 取的 LAI判断退出 LTE网络的终端所处的 LA是否支持 LTE网络覆盖; 若支持 LTE 网络覆盖,则退出 LTE网络的终端在退出 LTE网络的终端所处的 LA中搜索 LTE网络。 在本实施例中,根据支持 LTE网络覆盖的 LA的 LAI判断退出 LTE网络的终端所处的 LA是否支持 LTE网络覆盖, 若支持, 则优先在退出 LTE网络的终端所处的 LA中搜 索 LTE网络, 以便退出 LTE网络的终端能够迅速地进行搜索 LTE网络的操作, 缩短 了退出 LTE网络的终端确定进行 LTE网络搜索的 LA所需的时间。 为了提高搜索成功率, 在本优选实施例中, 在判断出退出 LTE网络的终端所处的 LA不支持 LTE网络覆盖后,退出 LTE网络的终端还可以选择在支持 LTE网络覆盖的、 且与退出 LTE网络的终端所处的 LA相邻的 LA中搜索 LTE网络, 以保证退出 LTE网 络的终端可以在支持 LTE网络覆盖的 LA中搜索 LTE网络, 提高了搜索成功率。 为了满足终端的不同需求, 增强本实施例的实用性, 在本优选实施例中, 对退出 LTE网络的终端根据 LTE网络覆盖信息在支持 LTE网络覆盖的 LA中搜索 LTE网络的 方法做了进一步的改进, 以便满足终端的不同需求。 具体地, 上述退出 LTE网络的终 端根据 LTE网络覆盖信息在支持 LTE网络覆盖的 LA中搜索 LTE网络的方法还包括: 根据 LTE网络覆盖信息在支持 LTE网络覆盖的 LA中搜索 LTE网络的步骤包括:退出 LTE网络的终端在空闲态时,根据 LTE网络覆盖信息在支持 LTE网络覆盖的 LA中搜 索 LTE网络; 若搜索到 LTE网络, 退出 LTE网络的终端判断是否需要接入搜索到的 LTE网络; 若判断出需要接入搜索到的 LTE网络, 则退出 LTE网络的终端接入到搜索 到的 LTE网络。 在本实施例中, 处于空闲态的退出 LTE网络的终端在搜索到 LTE网 络后, 可以根据需要选择是否接入搜索到的 LTE网络, 从而满足了终端的不同需求, 增强了本实施例的实用性。 实施例 3 在上述各优选实施例的基础上, 本优选实施例提供了 LTE网络的搜索方法的另一 种优选的方法, 如图 6所示, 该 LTE网络的搜索方法包括:
S602: 终端在 LTE网络下正常驻扎, 测量其他无线接入技术的情况, 在这种情况 下, 一般 LTE基站信息会广播异系统邻小区信息; S604: 终端在空闲态下重选到其他制式小区或者丢失 LTE网络覆盖后重选到其他 制式小区 (相当于终端退出 LTE网络);
S606: 终端进入其他制式的小区后, 发起位置更新过程;
S608: MSC保存所管辖的 LA中的小区对应的 LTE网络覆盖的信息,在位置更新 过程中指示 LAI对应的 LA是否有 LTE网络覆盖, 指示的信息可以精确到小区; S610: 终端返回空闲态后, 在指示存在 LTE网络覆盖的 LAI对应的 LA或小区中 搜索 LTE网络;
S612: 如果对应的 LA或小区不支持 LTE网络覆盖, 终端可以根据相关设置决定 以较长的周期搜索 LTE网络邻近小区或者不搜索 LTE网络邻区,上述相关设置包括是 否搜索和搜索的周期; S614: 终端在空闲态是否发生位置区变化, 如果在空闲态发生位置区变化, 重复 步骤 S606-S612, 如果终端发起 CS业务, 在 CS业务过程中如果产生切换, 则在切换 消息中根据 MSC保存的其所管辖的 LA中的小区对应的 LTE网络覆盖信息指示该 LA 是否有 LTE网络覆盖, 该 LTE网络覆盖信息可以详细到小区级别, CS业务结束后, 终端根据所处的 LA是否有 LTE网络小区覆盖决定是否搜索 LTE网络小区,若在空闲 态未发生位置区变化, 则转至步骤 S616;
S616: 如果终端在空闲态下搜索到了 LTE网络小区, 则根据小区重选流程决定是 否需要驻扎到搜索到的 LTE网络小区, 一旦终端重选到搜索到的 LTE网络小区, 终端 发起联合路由区更新, 执行步骤 S602。 在上述实施例中, 在终端进入其他制式的网络时, MSC 与 MME ( Mobile Management Entity, 移动性管理实体)有 SGs接口, MSC保存自身覆盖的 LA对应的
LTE网络覆盖情况, 可以在位置更新过程中或 CS业务过程中通知终端在哪个位置区 有 LTE网络覆盖, 且可以指示到小区一级, 终端在空闲态下进入相应的 LA或小区搜 索 LTE无线网络, 实现终端可以有针对性的搜索 LTE网络, 无需在没有指示 LTE小 区信息的其他制式的小区中一直开启 LTE网络小区搜索, 从而减少了终端的耗电量, 同时, 运营商无需升级其他制式的网络的基站以通知终端在其他制式的网络中的 LTE 网络小区信息, 从而降低了升级费用。 在上述实施例的基础上, 本优选实施例还提供了 LTE网络的搜索方法的又一种优 选的方法, 如图 7所示, 该 LTE网络的搜索方法包括:
S702: 终端在 LTE网络下正常驻扎, 测量其他无线接入技术的情况, 在这种情况 下, 一般 LTE基站信息会广播异系统邻小区信息;
S704: 终端需要进行 CS业务, 在 LTE网络中完成 CS-Fallback ( CS语音回退业 务) 过程; S706: 终端完成 CS-Fallback过程后, 终端进入其他制式的小区进行 CS业务;
S708: 在 CS业务过程中如果产生切换, 则在切换消息中根据 MSC保存的其所管 辖的 LA中的小区对应的 LTE网络覆盖信息指示该 LA是否有 LTE网络覆盖, 该 LTE 网络覆盖信息可以详细到小区级别, 如果没有切换产生, 默认支持 LTE网络覆盖;
S710: 终端释放 CS电路后, 如果没有重定向信息或 LTE网络相关信息, 终端驻 扎在其他制式的网络小区, 根据 LTE网络覆盖信息决定如何搜索 LTE网络;
S712: 如果对应的 LA或小区不支持 LTE网络覆盖, 终端可以以较长的周期搜索 或者不搜索 LTE网络小区, 如果对应的 LA或小区支持 LTE网络覆盖, 终端开始搜索 LTE网络小区; S714: 终端是否发生位置区变化, 如果发生位置区变化, 重复图 6 中的步骤 S606-S612, 如果未发生位置区变化, 则转至步骤 S716;
S716: 如果搜索到 LTE网络小区, 则根据小区重选流程决定是否需要驻扎到搜索 到的 LTE网络小区, 一旦重选到搜索到的 LTE网络小区, 终端发起联合路由区更新, 则执行图 6中的步骤 S602。 在上述实施例中, 在终端进入其他制式的网络时, MSC 与 MME ( Mobile Management Entity, 移动性管理实体)有 SGs接口, MSC保存自身覆盖的 LA对应的
LTE网络覆盖情况, 可以在位置更新过程中或 CS业务过程中通知终端在哪个位置区 有 LTE网络覆盖, 且可以指示到小区一级, 终端在空闲态下进入相应的 LA或小区搜 索 LTE无线网络, 实现终端可以有针对性的搜索 LTE网络, 无需在没有指示 LTE小 区信息的其他制式的小区中一直开启 LTE网络小区搜索, 从而减少了终端的耗电量, 同时, 运营商无需升级其他制式的基站以通知终端在其他制式的网络中的 LTE网络小 区信息, 从而降低了升级费用。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而, 可以 将它们存储在存储装置中由计算装置来执行, 并且在某些情况下, 可以以不同于此处 的顺序执行所示出或描述的步骤, 或者将它们分别制作成各个集成电路模块, 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明不限制于任 何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种 LTE网络的搜索方法, 包括:
退出长期演进 LTE网络的终端在进入其他制式的网络后接收移动交换中心 MSC发送的所述 MSC所管辖的位置区 LA的 LTE网络覆盖信息, 其中, 所述 LTE网络覆盖信息用于指示所管辖的 LA是否支持所述 LTE网络覆盖;
所述退出 LTE网络的终端根据所述 LTE网络覆盖信息在支持所述 LTE网 络覆盖的 LA中搜索 LTE网络。
2. 根据权利要求 1所述的方法, 其中, 所述退出 LTE网络的终端在进入其他制式 的网络后接收 MSC发送的所述 MSC所管辖的 LA的 LTE网络覆盖信息之前, 包括:
在所述退出 LTE 网络的终端在所述其他制式的网络进行位置更新的过程 中, 所述 MSC将其保存的所述 LTE网络覆盖信息发送给所述退出 LTE网络的 终端; 和 /或
在所述退出 LTE网络的终端在所述其他制式的网络进行电路交换 CS业务 的过程中, 所述 MSC将其保存的所述 LTE网络覆盖信息发送给所述退出 LTE 网络的终端。
3. 根据权利要求 1 所述的方法, 其中, 所述退出 LTE 网络的终端根据所述 LTE 网络覆盖信息在支持所述 LTE网络覆盖的 LA中搜索 LTE网络的步骤包括: 所述退出 LTE 网络的终端获取所述 LTE 网络覆盖信息中的位置区标识 LAI, 其中, 所述 LAI用于指示支持所述 LTE网络覆盖的 LA;
根据获取的所述 LAI判断所述退出 LTE网络的终端所处的 LA是否支持所 述 LTE网络覆盖;
若支持所述 LTE网络覆盖, 则所述退出 LTE网络的终端在所述退出 LTE 网络的终端所处的 LA中搜索所述 LTE网络。
4. 根据权利要求 3所述的方法, 其中, 在根据获取的所述 LAI判断所述退出 LTE 网络的终端所处的 LA是否支持所述 LTE网络覆盖之后, 还包括: 若判断出所 述退出 LTE网络的终端所处的 LA不支持所述 LTE网络覆盖,则所述退出 LTE 网络的终端在支持所述 LTE网络覆盖的、且与所述退出 LTE网络的终端所处的 LA相邻的所述 LA中搜索所述 LTE网络。
5. 根据权利要求 1所述的方法,其中,根据所述 LTE网络覆盖信息在支持所述 LTE 网络覆盖的所述 LA中搜索所述 LTE网络的步骤包括:
所述退出 LTE网络的终端在空闲态时,根据所述 LTE网络覆盖信息在支持 所述 LTE网络覆盖的 LA中搜索所述 LTE网络;
若搜索到所述 LTE网络,所述退出 LTE网络的终端判断是否需要接入搜索 到的所述 LTE网络;
若判断出需要接入搜索到的所述 LTE网络,则所述退出 LTE网络的终端接 入到搜索到的所述 LTE网络。
6. 根据权利要求 1-4任一项所述的方法, 其中, 所述 LTE网络覆盖信息进一步用 于指示所管辖的 LA上的小区是否支持所述 LTE网络覆盖。
7. 一种 LTE网络的搜索系统, 包括: 终端, 其中, 所述终端包括:
接收单元, 设置为在所述终端从 LTE网络退出后, 在进入其他制式的网络 后接收 MSC发送的所述 MSC所管辖的 LA的 LTE网络覆盖信息, 其中, 所述 LTE网络覆盖信息用于指示所管辖的 LA是否支持所述 LTE网络覆盖;
搜索单元,设置为根据所述 LTE网络覆盖信息在支持所述 LTE网络覆盖的 LA中搜索 LTE网络。
8. 根据权利要求 7所述的系统, 包括: MSC, 其中, 所述 MSC包括:
第一发送单元,设置为在所述退出 LTE网络的终端在所述其他制式的网络 进行位置更新的过程中, 将所述 MSC保存的所述 LTE网络覆盖信息发送给所 述退出 LTE网络的终端; 和 /或
第二发送单元,设置为在所述退出 LTE网络的终端在所述其他制式的网络 进行 CS业务的过程中, 将所述 MSC保存的所述 LTE网络覆盖信息发送给所 述退出 LTE网络的终端。
9. 根据权利要求 7所述的系统, 其中, 所述搜索单元包括:
获取模块, 设置为获取所述 LTE网络覆盖信息中的 LAL 其中, 所述 LAI 用于指示支持所述 LTE网络覆盖的 LA; 第一判断模块,设置为根据获取的所述 LAI判断所述退出 LTE网络的终端 所处的 LA是否支持所述 LTE网络覆盖;
第一搜索模块, 设置为在判断出所述退出 LTE网络的终端所处的 LA支持 所述 LTE网络覆盖后,在所述退出 LTE网络的终端所处的 LA中搜索所述 LTE 网络。
10. 根据权利要求 9所述的系统, 其中, 所述第一搜索模块还设置为在判断出所述 退出 LTE网络的终端所处的 LA不支持所述 LTE网络覆盖后,在支持所述 LTE 网络覆盖的、 且与所述退出 LTE网络的终端所处的 LA相邻的 LA中搜索所述 LTE网络。
11. 根据权利要求 7所述的系统, 其中, 所述搜索单元包括:
第二搜索模块, 设置为在所述退出 LTE网络的终端处于空闲态时, 根据所 述 LTE网络覆盖信息在支持所述 LTE网络覆盖的 LA中搜索所述 LTE网络; 第二判断模块, 设置为在搜索到所述 LTE网络后, 判断是否需要接入搜索 到的所述 LTE网络;
处理模块, 设置为在判断出需要接入搜索到的所述 LTE网络后, 将所述退 出 LTE网络的终端接入到所述搜索到的所述 LTE网络。
PCT/CN2012/077296 2011-12-05 2012-06-21 Lte网络的搜索方法和系统 WO2013082932A1 (zh)

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