WO2012006839A1 - 一种不同网络制式间切换的方法及装置 - Google Patents

一种不同网络制式间切换的方法及装置 Download PDF

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Publication number
WO2012006839A1
WO2012006839A1 PCT/CN2010/078723 CN2010078723W WO2012006839A1 WO 2012006839 A1 WO2012006839 A1 WO 2012006839A1 CN 2010078723 W CN2010078723 W CN 2010078723W WO 2012006839 A1 WO2012006839 A1 WO 2012006839A1
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WIPO (PCT)
Prior art keywords
cell
target cell
terminal
target
module
Prior art date
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PCT/CN2010/078723
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English (en)
French (fr)
Inventor
文永明
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP10854630.0A priority Critical patent/EP2525605B1/en
Priority to US13/578,632 priority patent/US9307473B2/en
Publication of WO2012006839A1 publication Critical patent/WO2012006839A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H04W36/008375—Determination of triggering parameters for hand-off based on historical data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • 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 invention relates to the field of wireless communication network switching, and more particularly to a method and apparatus for switching between different network standards. Background technique
  • GSM Global System for Mobile Communications
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High Speed Data Packet Access Access
  • CDMA Code Division Multiple Access 2000
  • EVDO Evolution Data Only
  • WiMAX Worldwide Interoperability for Microwave Access
  • LTE Long Term Evolution
  • interoperability standards which can achieve dual-mode switching between different network standards, that is, switching between different network standards without affecting user usage; for example, LTE has developed HSPA, EVDO, etc.
  • Interoperability standards between network standards there are still many network standards. For various reasons, there is no interconnection standard, or the interconnection standard is still in its infancy and cannot be commercialized. This will not enable dual-mode switching between any different network standards; for example, WiMAX and EVDO There is no commercially available interoperability standard, which makes it impossible to switch between WiMAX and EVDO.
  • a suitable WiMAX network refers to a signal that a terminal receives from a WiMAX network. This search process is relatively blind and may take a long time. As a result, the terminal's re-access delay from the EVDO network to the WiMAX network is very long. At the stage of searching, the connection between the terminal and the network. Will be disconnected, making the user experience very poor.
  • the main object of the present invention is to provide a method and device for switching between different network standards, which can improve the switching speed between different network standards, improve the user experience, and reduce the power consumption of the terminal.
  • the present invention provides a method for switching between different network standards, including:
  • the terminal sorts the target cells corresponding to the source cell that matches the current leaving cell in the history, forms a search list, selects the target cell according to the search list, and accesses.
  • the method before the sorting of the target cell corresponding to the source cell in the history record, the method further includes: comparing, by the terminal, the cell identifier of the currently leaving cell with the cell identity of the source cell in the history record. If it matches the cell identifier of one of the source cells in the history, it is determined that the currently leaving cell belongs to the source cell.
  • the terminal sorts the target cell corresponding to the source cell that matches the current cell in the history
  • the forming the search list includes: the terminal sorts the target cell according to the number of successful handovers of the source cell to the target cell. And forming a search list; performing one or more of the following steps to sort the target cells: the number of times the terminal fails to switch to the target cell handover, and the number of handover failures reaches the set value of the target cell.
  • the terminal combines the signal quality of the target cell, the ordering of the target cell whose signal quality reaches the sorting advance setting value is advanced, and the order of the target cell whose signal quality reaches the sorting and pushing setting value is pushed back; the terminal is combined in the target cell. Dwell time, if the dwell time is less than the set time, The target cell is ranked last.
  • the terminal fails to access the target cell, or the terminal does not receive the signal of the target cell. If it is determined that the target cell in the search list is not searched, the next target cell access is continued, if the target in the search list is determined. The cell has been searched, and the frequency points supported by the terminal are searched one by one and access to the cell.
  • the camping time of the combined terminal in the target cell is: a time between the terminal accessing the target cell and leaving the target cell as a dwell time of the terminal in the target cell, comparing the dwell time and the set time, When the dwell time is less than the set time, the target cell is ranked last.
  • the terminal accesses the target cell, or the terminal fails to access the target cell, or the terminal searches for the supported frequency points one by one and accesses the cell, and the terminal updates the history record.
  • the present invention also provides a device for switching between different network standards, the device includes a receiving module and a network access module, and the device further includes: a search configuration module and a recording module;
  • a search configuration module configured to sort a target cell corresponding to a source cell that matches a current leaving cell in a history of the recording module, form a search list, select a target cell according to the search list, and configure a receiving module;
  • a recording module for saving history for saving history.
  • the search configuration module is further configured to compare the cell identifier of the current leaving cell with the cell identifier of the source cell in the history record of the recording module, and if it matches the cell identifier of one of the source cells in the history, the current The leaving cell belongs to the source cell.
  • the search configuration module is specifically configured to: sort the target cells according to the number of successful handovers of the source cell to the target cell, to form a search list; and combine the one or more of the following situations to target Sorting the cells: Combining the number of times the source cell switches to the target cell handover failure, and pushing the ranking of the target cell whose number of handover failures reaches the set value; combining the signal quality of the target cell, the signal quality reaches the sorting advance setting value.
  • the sorting of the target cell is advanced, and the order of the target cells whose signal quality reaches the sorted push-down setting value is pushed back; The dwell time of the terminal in the target cell. If the dwell time is less than the set time, the target cell is ranked last to form a search list.
  • the search configuration module is specifically configured to: receive information that is not received by the receiving module; or reject the access information sent by the network access module, if it is determined that the target cell in the search list is not searched, The next target cell is selected, and the receiving module is configured according to the next target cell information. If it is determined that the target cell in the search category has been searched, the receiving frequency module configured by itself is selected one by one.
  • the search configuration module is further configured to: when the target cell is accessed, send timing information to the timing module; when leaving the target cell, send stop timing information to the timing module, and read the timing time of the timing module as the target cell.
  • the dwell time is saved in the history of the recording module, and the dwell time is compared with the set time.
  • the timing module is configured to receive the start timing information, start timing; receive stop Timing information, stop timing.
  • the search configuration module is further configured to: receive information about an access target cell or an access cell sent by the network access module, update a history record, receive information about the denied access sent by the network access module, and update the history. recording.
  • the method and device for switching between different network standards preferentially search for a cell with the highest number of successful handovers, fewer failures, and better signal quality in the history record, so that the handover is performed.
  • the probability of success is higher, which in turn improves the switching speed between different network standards; and enables the terminal to reduce the search time and reduce the power consumption of the terminal, thereby improving the user experience.
  • FIG. 1 is a schematic flowchart of a method for implementing handover of different network standards according to the present invention
  • FIG. 2 is a schematic diagram of an example of implementing different network standard switching according to the present invention.
  • FIG. 3 is a schematic diagram of a device composition for implementing different network standard switching according to the present invention. detailed description
  • the basic idea of the present invention is: When the terminal needs to switch networks, the target cells corresponding to the source cells in the history that match the currently separated cells are sorted to form a search list, and the target cell is selected according to the search list and accessed.
  • the history record is a handover record between the different network standards saved by the terminal, including: the source cell information and the corresponding target cell information at the time of handover, and the number of successful handovers from the source cell to the target cell;
  • the source cell refers to
  • the source cell information includes: a source cell identifier;
  • the target cell refers to a network that provides a network signal to the terminal and remains connected, and the terminal enters the cell, the target is not connected to the terminal, and the terminal is not connected to the terminal.
  • the cell information includes a frequency point, a pseudo random code (PN) offset, and the like.
  • PN pseudo random code
  • the source cell information or the target cell information is the content of the cell broadcast information sent by the source cell or the target cell to the terminal after the terminal accesses the source cell or the target cell, and the terminal switches from the source cell to the target cell, and records the switch.
  • the result includes: the number of successful handovers or the number of handover failures; the number of handover failures when the source cell switches to the target cell; the signal quality of the target cell when the source cell switches to the target cell, the signal quality is the terminal connection Obtaining when entering the target cell; and staying time of the target cell; where the camping time is the connection time between the terminal and the target cell, and the terminal starts to start the internal timer after accessing the target cell, leaving the target cell After the timer is stopped, the time displayed by the timer is the dwell time of the target cell.
  • the method for switching different network standards proposed by the present invention specifically includes the following steps:
  • Step 101 When the terminal needs to switch the network, determine that the current leaving cell belongs to the source cell in the history record, and sort the target cells corresponding to the source cell to form a search list.
  • the terminal determines whether the current cell leaves the cell and whether it belongs to the source cell in the history record.
  • the specific process is as follows: The terminal is small according to the current departure. The cell identifier of the area is used to query the locally saved history record. If there is no source cell in the history record that matches the cell identity of the currently leaving cell, the first time the current cell is left in the cell to perform the handover of different network standards, and the terminal according to the prior art
  • the search method in the search for the frequency points in the supported frequency band one by one until receiving the signal of the target cell and accessing;
  • the terminal sorts the target cells corresponding to the source cell that matches the current leaving cell according to the history record, and forms a search list, where the ordering includes: according to the number of successful handovers between the source cell and the target cell, according to the number of successful handovers
  • the target cell is sorted in a lesser order; the target cell may be sorted according to one or more of the following conditions: The number of times the handover fails to reach the set value is combined with the number of times the source cell switches to the target cell handover failure. The sorting of the target cells is pushed back;
  • the set value of the number of handover failures can be set by the user, and the position pushed by the target cell can also be set by the user, for example: the number of handover failures is 1 to 4 times, the ranking is pushed backwards by 2 digits, and the handover fails. 5 to 10 times, sorted by 4, etc.;
  • the post-push setting value can be set by the user.
  • the ordering advance and post-pushing order of the target cell can also be set by the user, for example: the target cell with the signal quality of 1 to 2 cells is sorted by 2 bits, and the signal quality is The target cell of 4 to 5 cells is sorted by 2 bits in advance;
  • the target cell is a temporary cell, and the rank of the temporary cell is ranked last; if the temporary cell is more In one, the number of successful handovers to the temporary cell according to the source cell Sorting the temporary cells; wherein, the set time can be set by the user, and the temporary cell refers to a cell with better signal in a small coverage area, because the mobility of the terminal, the terminal accesses the temporary After the cell, the signal will be weakened rapidly, so you should try to avoid accessing the temporary cell.
  • Step 102 The terminal selects a target cell according to the search list, and accesses the target cell.
  • the terminal selects a target cell according to the order of the search list, and takes the first target cell as an example, and reads a receiver of the first target cell information configuration terminal in the history record, where the receiver is configured to receive the cell signal according to the configuration.
  • the receiver receives the signal of the first target cell, and the terminal sends an access request to the base station where the first target cell is located, where the access request includes authentication information, where the authentication information includes the terminal passing the key according to its own key.
  • the pseudo-random number calculated by the authentication center the base station receives the access request, and calculates a pseudo-random number through the authentication center according to the key of the terminal saved by itself, if it matches the pseudo-random number in the authentication information, The terminal is allowed to access; otherwise, the terminal is denied access, and the terminal handover fails.
  • the terminal determines that the search list has not been searched, and continues to search for the next target cell.
  • the search process is the same as the first target cell, except that the second target cell is searched and accessed.
  • the terminal determines that the search list is not searched for: the terminal compares the first target cell with the search list, and if the first target cell is the last cell sorted in the search list, the search list has been searched, and the terminal according to the prior art The search method in the search for the frequency points in the supported frequency band one by one until receiving the signal of the cell and accessing; otherwise, the search list is not searched.
  • Step 103 The terminal updates the history.
  • the terminal accesses the target cell, or the terminal receives the signal of the cell and accesses according to the search method in the prior art, and the terminal updates the history record.
  • the updating includes: if the terminal determines that the current leaving cell does not belong to the source cell, the current leaving cell is used as the source cell, and the accessed cell is used as the target cell, and the historical record is added.
  • a record of the correspondence between the source cell and the target cell the record includes: source cell information, target cell information, the number of times the source cell switches to the target cell handover success, and the signal quality of the target cell, and the camp time of the target cell;
  • the terminal continues to determine whether the accessed cell belongs to the target cell in the history record, determines that the cell belongs to the target cell, increases the number of successful handovers between the source cell and the target cell, and the signal quality of the target cell in the history record. If the target cell is not in the target cell, the cell that is the access cell is added as the target cell of the source cell to the history record, and the target cell information, the number of successful handovers between the source cell and the target cell, and the target cell are added. Signal quality, dwell time in the target cell.
  • the determining, by the terminal, whether the cell that belongs to the target cell belongs to the target cell includes: the terminal compares the cell identifier of the target cell corresponding to the cell identifier of the cell to which the cell is located, and if it matches the cell identifier of one of the target cells, The access cell belongs to the target cell. Otherwise, the access cell does not belong to the target cell. Further, if the terminal handover fails, the number of times the source cell switches to the target cell handover failure is updated to the history record.
  • the present invention will be described in detail below through a specific embodiment.
  • the cells A, C, and D belong to the X network standard
  • the cells B and E belong to the Y network standard
  • the coverage of each cell is circled by a dotted circle.
  • the terminal moves along the road to the cell B at the coverage edge of the cell A, and the terminal detects that the signal of the cell A is weak, which is insufficient to support the connection, and other cell signals of the X network system are not enough to support the connection;
  • the cell A has historically switched to the cell B and E of the Y network standard, that is, the cell A exists as a source cell in the history record, and the terminal corresponds to the source cell, that is, the cell A.
  • the target cells, ie, cells B and E are sorted to form a search list;
  • the terminal searches for cell B for the first time, which will greatly increase the probability of receiving the cell signal and accessing, if the terminal does not receive the signal of cell B or the cell The base station where B is located is denied access. Then, the terminal continues to search for the cell E and accesses. If the terminal still does not receive the signal of the cell E or the base station where the cell E is located, the terminal refuses to access according to the method in the prior art. Search for supported frequency points.
  • the present invention further provides a device for switching between different network standards.
  • the device includes a search configuration module 301, a receiving module 303, a network access module 304, and a recording module 302. ,
  • the search configuration module 301 is configured to determine that the current leaving cell belongs to the source cell, and sort the target cells corresponding to the source cell that matches the current leaving cell in the history record of the recording module 302 to form a search list; and select a target according to the search list.
  • the network access module 304 is configured to send an access request to the base station where the target cell is located, and access the target cell.
  • the recording module 302 is configured to save the history.
  • the search configuration module 301 is further configured to compare the cell identifier of the current leaving cell with the cell identifier of the source cell in the history record of the recording module 302, and if it matches the cell identifier of one of the source cells in the history, determine that the current cell is left.
  • the cell belongs to the source cell, that is, it exists as a source cell.
  • the search configuration module 301 is specifically configured to: according to the number of successful handovers between the source cell and the target cell, sort the target cells according to the order of the number of successful handovers;
  • the target cells can also be sorted in combination with one or more of the following:
  • the sequence of the target cell whose number of handover failures reaches the set value is pushed back; wherein the set value of the number of handover failures is available to the user.
  • the setting, the post-pushing position of the target cell can also be set by the user, for example: the number of switching failures is 1 to 4 times, the sorting is pushed back by 2 digits, the number of switching failures is 5 to 10 times, and the ranking is pushed back by 4 digits. Wait;
  • the ordering of the target cells whose signal quality reaches the sorting advance setting value is advanced, and the order of the target cells whose signal quality reaches the sorting and pushing setting value is pushed back; wherein, the sorting extracts the set value and The sorting and pushing setting values can be set by the user.
  • the ordering advance and the pushed order of the target cell can also be set by the user, for example: the target cell with the signal quality of 1 to 2 cells is sorted by 2 bits, and the signal quality is Sorting the target cells of 4 to 5 cells in advance by 2 bits;
  • the target cell is a temporary cell, and the rank of the temporary cell is ranked last. If the temporary cell is more than one, the source cell is switched to the temporary cell. The number of times the cell handover succeeds, and the temporary cells are sorted, and the set time can be set by the user.
  • the temporary cell refers to a cell with better signal in a small coverage area, because the mobility of the terminal, the terminal After accessing the temporary cell, the signal will be weakened rapidly. Therefore, access to the temporary cell should be avoided as much as possible.
  • the receiving module 303 is further configured to: when the signal of the target cell is not received, send the unreceivable signal information to the search configuration module 301; or
  • the network access module 304 is further configured to: send an access request to the base station where the target cell is located, receive the allowed access information returned by the base station, and send the allowed access information to the search configuration module 301; and receive the denied access information returned by the base station.
  • the base station is configured to receive an access request, and perform authentication on the terminal. If the authentication is passed, the terminal is allowed to access; otherwise, the terminal is denied access; the authentication includes: the base station passes the key of the terminal saved by itself.
  • the authentication center calculates a pseudo-random number, if it is a pseudo-random number in the authentication information. If it matches, the authentication is passed; otherwise, the authentication fails;
  • the search configuration module 301 is further configured to: receive the unreceivable signal information sent by the receiving module 303 or the reject access information sent by the network access module 304, determine that the target cell in the search list is not searched, and select the next target cell. That is, the cell information configuration receiving module of the second target cell; determining that the target cell search in the search list is completed, according to the method in the prior art, selecting the frequency point configuration receiving module 303 in the supported frequency band one by one;
  • the determining that the target cell in the search list is not searched comprises: comparing the first target cell with the search list, if the first target cell is the last cell in the search list, the search list has been searched; otherwise, searching The list has not been searched.
  • the search configuration module 301 is further configured to: receive the access permission information sent by the network access module 304, and update the history record in the recording module 302.
  • the updating includes: determining that the current leaving cell does not belong to the source cell, and using the current leaving cell as the source The cell, the accessed cell is used as the target cell, and a record of the correspondence between the source cell and the target cell is added to the history record, where the record includes: source cell information, target cell information, number of times the source cell switches to the target cell handover success, Signal quality of the target cell, dwell time in the target cell;
  • the current cell belongs to the source cell
  • it is determined whether the accessed cell belongs to the target cell in the history record determines that the cell belongs to the target cell, increases the number of successful handovers between the source cell and the target cell, the signal quality of the target cell, and the resident cell in the target cell. If the target cell is not the target cell, the cell that is the access cell is added as the target cell of the source cell to the history record, the target cell information, the number of successful handovers between the source cell and the target cell, the signal quality of the target cell, and the target cell are determined. The dwell time.
  • the cell identifier of the target cell corresponding to the cell identifier of the cell of the access cell is compared, and if the cell identity of one of the target cells matches, The access cell belongs to the target cell, otherwise, the access cell does not belong to the target cell; and, if the access network sends the refusal access information sent by the network access module 304, The number of times the source cell is switched to the target cell handover failure is updated to the history.
  • the device further includes a timing module 305;
  • the search configuration module 301 is further configured to access the target cell, that is, the access permission information sent by the receiving network access module 304, and start the timing module 305, that is, send the start timing information to the timing module 305;
  • the leaving the target cell information sent by the network access module 304 stops the timing module, that is, sends the stop timing information to the timing module 305, and reads the time of the timing module, that is, the resident time, and saves it in the history record of the recording module 302. Compare the dwell time with the set time, and when the set time is less than the set time, the target cell is last;
  • the timing module 305 is configured to receive start timing information, start timing, receive stop timing information, and stop timing;
  • the network access module 304 is configured to: when accessing the target cell, send the allowed access information to the search configuration module 301; leave the network coverage of the target cell, and send the leaving target cell information to the search configuration module 301.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明公开了一种不同网络制式间切换的方法，包括：终端在需要切换时，对历史记录中与当前离开小区相符的源小区对应的目标小区进行排序，形成搜索列表，根据搜索列表选取目标小区并接入。本发明还公开了一种不同网络制式间切换的装置，釆用本发明所述的方法及装置，提高不同网络间的切换速度，提升用户体验，降低终端的功耗。

Description

一种不同网络制式间切换的方法及装置 技术领域
本发明涉及无线通信网络切换领域， 特别是指一种不同网络制式间切 换的方法及装置。 背景技术
随着现代无线通信技术的发展， 越来越多的网络制式得到了广泛应用。 例如， 现在常用的网络制式有： 全球移动通讯系统（GSM )、 宽带码分多址 ( WCDMA )、 高速数据信息包接入存取技术 ( HSPA )、 码分多址（ CDMA ) 2000、 EVDO ( Evolution Data Only ), 全球微波互联接入（ WiMAX )、 长 期演进（LTE )等等。
众多的网络制式中有些制定了互联互通的标准， 可以实现不同网络制 式之间的双模切换， 即在不同网络制式间切换， 且不影响用户使用； 例如， LTE就制定了与 HSPA、 EVDO等网络制式之间的互联互通标准。 但是， 还 有很多网络制式， 因为种种原因尚未制定互联互通标准， 或者互联互通标 准制定尚在起步阶段， 无法商用， 这样就无法实现任意不同网络制式之间 的双模切换； 例如 WiMAX和 EVDO之间就没有可商用的互联互通标准， 这使得 WiMAX和 EVDO之间尚无法进行双模切换。
如果没有互联互通标准， 即： 没有双模切换标准的支撑， 在两种网络 制式下工作的终端在两种网络制式间切换将十分緩慢； 例如， 现在有的终 端已经具有了分别在 WiMAX和 EVDO两种网络制式下工作的能力； 当终 端要从 EVDO网络覆盖地区漫游到 WiMAX网络覆盖地区时， 因为没有双 模切换标准， 终端必须要自己去搜索 WiMAX 网络， 终端逐个搜索所支持 的频段范围内的频点， 直到在某个频点找到合适的 WiMAX 网络为止， 所 述合适的 WiMAX网络指终端接收到 WiMAX网络的信号。 这个搜索过程 比较盲目， 有可能需要花费很长时间， 如此， 就会导致终端从 EVDO网络 到 WiMAX 网络的重新接入时延很长， 在进行搜索的这一阶段， 终端与网 络之间的连接会断开， 使用户体验很差。 发明内容
有鉴于此， 本发明的主要目的在于提供一种不同网络制式间切换的方 法及装置， 能提高不同网络制式间的切换速度， 提升用户体验， 降低终端 的功耗。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供了一种不同网络制式间切换的方法， 包括：
终端在需要切换时， 对历史记录中与当前离开小区相符的源小区所对 应的目标小区进行排序， 形成搜索列表， 根据搜索列表选取目标小区并接 入。
上述方案中， 所述对历史记录中与当前离开小区相符的源小区所对应 的目标小区进行排序之前， 该方法进一步包括： 终端将当前离开小区的小 区标识与历史记录中源小区的小区标识比较， 若与历史记录中其中一个源 小区的小区标识相符， 则确定当前离开小区属于源小区。
上述方案中， 所述终端对历史记录中与当前离开小区相符的源小区所 对应的目标小区进行排序， 形成搜索列表包括： 终端根据源小区切换到目 标小区切换成功的次数， 对目标小区进行排序， 形成搜索列表； 还可以执 行以下步骤中的一个或多个， 对目标小区进行排序： 终端结合源小区切换 到目标小区切换失败的次数， 将切换失败的次数达到设定值的目标小区的 排序推后； 终端结合目标小区的信号质量， 将信号质量达到排序提前设定 值的目标小区的排序提前， 将信号质量达到排序推后设定值的目标小区的 排序推后； 终端结合在目标小区的驻留时间， 若驻留时间小于设定时间， 将目标小区排在最后。
上述方案中： 终端接入目标小区失败， 或终端没有接收到目标小区的 信号， 若确定搜索列表中的目标小区未被搜索完毕， 继续选取下一目标小 区接入， 若确定搜索列表中的目标小区已被搜索完毕， 逐个搜索终端所支 持的频点并接入小区。
上述方案中， 所述结合终端在目标小区的驻留时间为： 将终端接入目 标小区到离开目标小区之间的时间作为终端在目标小区的驻留时间， 比较 驻留时间与设定时间， 驻留时间小于设定时间时， 将目标小区排在最后。
上述方案中： 终端接入目标小区， 或终端接入目标小区失败， 或终端 逐个搜索所支持的频点并接入小区， 终端更新历史记录。
本发明还提供了一种不同网络制式间切换的装置， 该装置包括接收模 块、 网络接入模块， 所述装置还包括： 搜索配置模块、 记录模块；
搜索配置模块， 用于对记录模块的历史记录中与当前离开小区相符的 源小区所对应的目标小区进行排序， 形成搜索列表， 根据搜索列表， 选取 目标小区， 配置接收模块；
记录模块， 用于保存历史记录。
上述方案中， 搜索配置模块进一步用于， 将当前离开小区的小区标识 同记录模块的历史记录中的源小区的小区标识比较， 若与历史记录中的其 中一个源小区的小区标识相符， 则当前离开小区属于源小区。
上述方案中， 所述搜索配置模块具体用于， 根据源小区切换到目标小 区切换成功的次数， 对目标小区进行排序， 形成搜索列表； 还可以结合以 下情况中的一种或多种， 对目标小区进行排序： 结合源小区切换到目标小 区切换失败的次数， 将切换失败的次数达到设定值的目标小区的排序推后； 结合目标小区的信号质量， 将信号质量达到排序提前设定值的目标小区的 排序提前， 将信号质量达到排序推后设定值的目标小区的排序推后； 结合 终端在目标小区的驻留时间， 若驻留时间小于设定时间， 将目标小区排在 最后， 形成搜索列表。
上述方案中， 所述搜索配置模块具体用于， 接收接收模块发送的接收 不到信号的信息； 或者网络接入模块发送的拒绝接入的信息， 若确定搜索 列表中的目标小区没有搜索完毕， 继续选取下一目标小区， 根据下一目标 小区信息配置接收模块； 若确定搜索类别中的目标小区已经搜索， 逐个选 取自身支持的频点配置接收模块。
上述方案中： 搜索配置模块， 进一步用于接入目标小区时， 向计时模 块发送开始计时信息； 离开目标小区时， 向计时模块发送停止计时信息， 读取计时模块的计时时间作为在目标小区的驻留时间， 保存在记录模块的 历史记录中， 将驻留时间与设定时间比较， 小于设定时间时将目标小区排 在最后； 计时模块， 用于接收开始计时信息， 开始计时； 接收停止计时信 息， 停止计时。
上述方案中， 所述搜索配置模块进一步用于， 接收网络接入模块发送 的接入目标小区或接入小区的信息， 更新历史记录； 接收网络接入模块发 送的拒绝接入的信息， 更新历史记录。
由此可见， 釆用本发明所述的不同网络制式间切换的方法及装置， 优 先搜索历史记录中成功切换次数最多、 失败次数较少、 信号质量较好等综 合因素较高的小区， 使切换成功概率更高， 进而提高不同网络制式间的切 换速度； 并能使终端减少搜索的时间， 降低终端的功耗， 从而提升用户的 体验。 附图说明
图 1为本发明实现不同网络制式切换的方法流程示意图；
图 2为本发明实现不同网络制式切换示例示意图；
图 3为本发明实现不同网络制式切换的装置组成示意图。 具体实施方式
本发明的基本思想是： 终端需要切换网络时， 将历史记录中与当前离 开的小区相符的源小区对应的目标小区排序， 形成搜索列表， 根据搜索列 表选择目标小区并接入。
这里， 所述历史记录为终端保存的在不同网络制式间的切换记录， 包 括： 切换时源小区信息以及对应的目标小区信息、 从源小区切换到目标小 区切换成功的次数； 所述源小区指因网络信号变差， 无法与终端保持连接， 终端离开的小区， 所述源小区信息包括： 源小区标识； 所述目标小区指为 终端提供网络信号并保持连接， 终端进入的小区， 所述目标小区信息包括 频点、 伪随机码 ( PN )偏置等。
其中， 源小区信息或目标小区信息为终端接入源小区或目标小区后， 由源小区或目标小区向终端下发的小区广播信息中的内容， 终端从源小区 切换到目标小区， 要记录切换结果， 包括： 切换成功的次数或切换失败的 次数； 从源小区切换到目标小区时切换失败的次数； 源小区每次切换到目 标小区时， 目标小区的信号质量， 所述信号质量为终端接入目标小区时获 取； 以及在目标小区的驻留时间； 这里， 所述驻留时间为终端与目标小区 的连接时间， 终端在接入到目标小区后开始启动内部的计时器， 在离开目 标小区后停止计时器， 计时器显示的时间即为在目标小区的驻留时间。
本发明提出的不同网络制式切换的方法， 如图 1 所示， 具体包括步骤 下：
步骤 101、终端需要切换网络时， 确定当前离开小区在历史记录中属于 源小区， 对源小区对应的目标小区进行排序， 形成搜索列表；
这里， 终端位于当前网络的边缘时， 当前网络信号变差， 无法继续保 持连接， 则需要离开当前所在的小区； 此时， 终端判断当前离开小区， 在 历史记录中是否属于源小区， 所述判断具体过程为： 终端根据当前离开小 区的小区标识， 查询本地保存的历史记录， 若历史记录中没有与当前离开 小区的小区标识相符的源小区， 则第一次在当前离开小区进行不同网络制 式的切换， 终端要按照现有技术中的搜索方法逐个搜索所支持频段内的频 点， 直至接收到目标小区的信号并接入为止；
若历史记录中有与当前离开小区的小区标识相符的源小区， 说明终端 曾在当前离开小区中进行过不同网络制式的切换， 当前离开小区属于源小 区， 也就是说， 当前离开小区作为源小区存在， 可以借鉴之前切换的经验。 终端根据历史记录对与所述当前离开小区相符的源小区对应的目标小区进 行排序， 形成搜索列表， 所述排序包括： 根据源小区与目标小区切换成功 的次数， 按照切换成功的次数由多到少的顺序， 对目标小区进行排序； 还 可以结合以下情况中的一种或多种， 对目标小区进行排序： 结合源小区切 换到目标小区切换失败的次数， 将切换失败的次数达到设定值的目标小区 的排序推后；
其中， 切换失败的次数的设定值可由用户设定， 对于目标小区推后的 位次也可由用户设定， 例如： 切换失败的次数为 1到 4次， 排序推后 2位， 切换失败的次数为 5到 10次， 排序推后 4位等；
结合目标小区的信号质量， 将信号质量达到排序提前设定值的目标小 区的排序提前， 将信号质量达到排序推后设定值的目标小区的排序推后； 其中， 排序提取设定值及排序推后设定值可由用户设定， 对于目标小 区的排序提前及推后的位次也可由用户设定， 例如： 信号质量为 1到 2格 信号的目标小区排序推后 2位， 信号质量为 4到 5格信号的目标小区排序 提前 2位；
结合终端在目标小区的驻留时间， 将驻留时间与设定时间比较， 若驻 留时间小于设定时间， 则目标小区为临时小区， 将临时小区的位次排在最 后； 若临时小区多于一个， 则按照源小区切换到临时小区切换成功的次数 的多少， 对临时小区进行排序； 其中， 所述设定时间可由用户自行设定， 所述临时小区指在很小的覆盖范围内信号较好的小区， 因为终端的移动性， 终端接入临时小区后信号会急速变弱， 因此应尽量避免接入临时小区。
步骤 102、 终端根据搜索列表， 选取目标小区并接入；
本步骤中， 终端根据搜索列表的排序， 选取目标小区， 以第一目标小 区为例， 读取历史记录中第一目标小区信息配置终端的接收机， 所述接收 机用于根据配置接收小区信号； 接收机接收到第一目标小区的信号， 终端 向第一目标小区所在的基站发送接入请求， 所述接入请求中包括鉴权信息， 所述鉴权信息包括终端根据自身的密钥通过鉴权中心计算得出的伪随机 数； 基站接收接入请求， 并根据自身保存的终端的密钥， 通过鉴权中心计 算得出伪随机数， 若与鉴权信息中的伪随机数相符， 则允许终端接入； 否 则拒绝终端接入， 终端切换失败。
若接收机没有接收到第一目标小区的信号， 或者终端切换失败， 终端 确定搜索列表未搜索完毕， 则继续搜索下一目标小区。 以第二目标小区为 例， 与第一目标小区搜索接入过程相同， 所不同之处仅在于： 所搜索及接 入的是第二目标小区。 这里， 所述终端确定搜索列表未搜索完毕包括： 终 端将第一目标小区同搜索列表比较， 若第一目标小区为搜索列表中排序最 后的小区， 则搜索列表已搜索完毕， 终端按照现有技术中的搜索方法逐个 搜索所支持频段内的频点， 直至接收到小区的信号并接入为止； 否则， 搜 索列表未搜索完毕。
步骤 103、 终端更新历史记录。
本步骤中， 终端接入目标小区， 或者终端按照现有技术中的搜索方法， 接收到小区的信号并接入， 终端更新历史记录。
其中， 所述更新包括： 终端确定当前离开小区不属于源小区， 则将当 前离开小区作为源小区， 所接入的小区作为目标小区， 在历史记录中增加 一条源小区与目标小区对应关系的记录， 该记录包括： 源小区信息、 目标 小区信息、 源小区切换到目标小区切换成功的次数、 以及目标小区的信号 质量、 在目标小区的驻留时间；
若当前离开小区属于源小区， 则终端继续判断接入的小区在历史记录 中是否属于目标小区， 确定属于目标小区， 在历史记录中增加源小区与目 标小区切换成功的次数、 目标小区的信号质量、 在目标小区的驻留时间； 确定不属于目标小区， 则将接入的小区作为源小区的目标小区添加到历史 记录， 增加目标小区信息、 源小区与目标小区切换成功的次数、 目标小区 的信号质量、 在目标小区的驻留时间。
其中， 所述判断接入的小区在历史记录中是否属于目标小区包括： 终 端将接入小区的小区标识同源小区对应的目标小区的小区标识比较， 若与 其中一个目标小区的小区标识相符， 则接入小区属于目标小区， 否则， 接 入小区不属于目标小区； 进一步的， 若终端切换失败， 将源小区切换到目 标小区切换失败的次数更新到历史记录。
下面通过一个具体实施例来对本发明进行详细说明， 如图 2所示， £设小区 A、 C、 D属于 X网络制式， 小区 B、 E属于 Y网络制式， 每 个小区的覆盖范围用虚线圓圈表示， 终端在小区 A的覆盖边缘沿着公路向 小区 B移动， 终端检测到小区 A的信号变弱， 不足以支撑连接， 且 X网络 制式的其他小区信号也不足以支撑连接； 此时， 终端查询自身保存的历史 记录， 4叚设小区 A历史上曾经向 Y网络制式的小区 B、 E切换过， 即： 小 区 A在历史记录中作为源小区存在， 则终端对源小区即小区 A对应的目标 小区即小区 B、 E进行排序， 形成搜索列表；
假设， 小区 A向小区 B切换成功的次数为 5次， 信号质量为 4格， 驻 留时间为 18分钟，切换失败次数为 1次； 小区 A向小区 E切换成功的次数 为 1次， 信号质量为 2格， 驻留时间为 1分钟， 切换失败次数为 2次， 那 么搜索列表中的排序为小区 B、 小区 E, 终端第一次搜索小区 B, 将在很大 程度上增加接收到小区信号并接入的概率， 若终端接收不到小区 B的信号 或被小区 B所在的基站拒绝接入， 那么， 终端继续搜索小区 E并接入， 若 终端仍接收不到小区 E的信号或被小区 E所在的基站拒绝接入， 那么终端 按照现有技术中的方法逐个搜索所支持的频点。
为实现上述方法， 本发明还提供了一种在不同网络制式间切换的装置， 如图 3所示， 该装置包括搜索配置模块 301、 接收模块 303、 网络接入模块 304、 记录模块 302; 其中，
搜索配置模块 301 , 用于确定当前离开小区属于源小区， 对记录模块 302 的历史记录中与所述当前离开小区相符的源小区对应的目标小区进行 排序，形成搜索列表；根据搜索列表，选取目标小区信息配置接收模块 303 ; 接收模块 303 , 用于根据搜索配置模块 301的配置，接收目标小区信号 并发送给网络接入模块 304;
网络接入模块 304, 用于向目标小区所在的基站发送接入请求，接入目 标小区；
记录模块 302 , 用于保存历史记录。
搜索配置模块 301 进一步用于， 将当前离开小区的小区标识同记录模 块 302 的历史记录中的源小区的小区标识比较， 若与历史记录中的其中一 个源小区的小区标识相符， 则确定当前离开小区属于源小区， 即作为源小 区存在。
搜索配置模块 301具体用于， 根据源小区与目标小区切换成功的次数， 按照切换成功的次数由多到少的顺序， 对目标小区进行排序；
还可以结合以下情况中的一种或多种对目标小区进行排序：
结合源小区切换到目标小区切换失败的次数， 将切换失败的次数达到 设定值的目标小区的排序推后； 其中， 切换失败的次数的设定值可由用户 设定， 对于目标小区推后的位次也可由用户设定， 例如： 切换失败的次数 为 1到 4次， 排序推后 2位， 切换失败的次数为 5到 10次， 排序推后 4位 等；
还结合目标小区的信号质量， 将信号质量达到排序提前设定值的目标 小区的排序提前， 将信号质量达到排序推后设定值的目标小区的排序推后； 其中， 排序提取设定值及排序推后设定值可由用户设定， 对于目标小区的 排序提前及推后的位次也可由用户设定， 例如： 信号质量为 1到 2格信号 的目标小区排序推后 2位，信号质量为 4到 5格信号的目标小区排序提前 2 位；
还结合终端在目标小区的驻留时间， 若驻留时间小于设定时间， 则目 标小区为临时小区， 将临时小区的位次排在最后， 若临时小区多于一个， 按照源小区切换到临时小区切换成功的次数的多少， 对临时小区进行排序， 所述设定时间可由用户自行设定， 所述临时小区指在很小的覆盖范围内信 号较好的小区， 因为终端的移动性， 终端接入临时小区后信号会急速变弱， 因此应尽量避免接入临时小区。
接收模块 303 进一步用于， 接收不到目标小区的信号时， 向搜索配置 模块 301发送无法接收信号信息； 或者，
网络接入模块 304,进一步用于，向目标小区所在的基站发送接入请求， 接收基站返回的允许接入信息， 将允许接入信息发送给搜索配置模块 301 ; 接收基站返回的拒绝接入信息， 将拒绝接入信息发送给搜索配置模块 301； 所述接入请求中包括鉴权信息， 所述鉴权信息包括终端根据自身的密钥通 过鉴权中心计算得出的伪随机数；
相应的， 基站， 用于接收接入请求， 对终端进行鉴权， 若鉴权通过， 允许终端接入； 否则拒绝终端接入； 所述鉴权包括： 基站根据自身保存的 终端的密钥通过鉴权中心计算得出伪随机数， 若与鉴权信息中的伪随机数 相符， 则鉴权通过； 否则鉴权失败；
搜索配置模块 301 , 进一步用于，接收接收模块 303发送的无法接收信 号信息或者网络接入模块 304发送的拒绝接入信息， 确定搜索列表中的目 标小区没有被搜索完毕， 选取下一目标小区， 即第二目标小区的小区信息 配置接收模块； 确定搜索列表中的目标小区搜索完毕， 按照现有技术中的 方法， 逐个选取所支持频段中的频点配置接收模块 303;
这里， 所述确定搜索列表中的目标小区没有被搜索完毕包括： 第一目 标小区同搜索列表比较， 若第一目标小区为搜索列表中排序最后的小区， 则搜索列表已搜索完毕； 否则， 搜索列表未搜索完毕。
搜索配置模块 301进一步用于， 接收网络接入模块 304发送的允许接 入信息， 更新记录模块 302 中的历史记录； 所述更新包括： 确定当前离开 小区不属于源小区， 将当前离开小区作为源小区， 所接入的小区作为目标 小区， 在历史记录中增加一条源小区与目标小区对应关系的记录， 该记录 包括： 源小区信息、 目标小区信息、 源小区切换到目标小区切换成功的次 数、 目标小区的信号质量、 在目标小区的驻留时间；
若当前离开小区属于源小区， 继续判断接入的小区在历史记录中是否 属于目标小区， 确定属于目标小区， 增加源小区与目标小区切换成功的次 数、 目标小区的信号质量、 在目标小区的驻留时间； 确定不属于目标小区， 则将接入的小区作为源小区的目标小区添加到历史记录， 增加目标小区信 息、 源小区与目标小区切换成功的次数、 目标小区的信号质量、 在目标小 区的驻留时间。
其中， 所述判断接入的小区在历史记录中是否属于目标小区包括： 将 接入小区的小区标识同源小区对应的目标小区的小区标识比较， 若与其中 一个目标小区的小区标识相符， 则接入小区属于目标小区， 否则， 接入小 区不属于目标小区； 并且， 若接收网络接入模块 304发送的拒绝接入信息， 将源小区切换到目标小区切换失败的次数更新到历史记录。
该装置进一步包括， 计时模块 305 ;
搜索配置模块 301接入进一步用于， 接入目标小区， 即接收网络接入 模块 304发送的允许接入信息， 启动计时模块 305 , 即向计时模块 305发送 开始计时信息； 离开目标小区， 即接收网络接入模块 304发送的离开目标 小区信息， 停止计时模块， 即向计时模块 305发送停止计时信息， 读取计 时模块的计时时间， 即驻留时间， 并保存在记录模块 302 的历史记录中， 将驻留时间与设定时间比较， 小于设定时间时将目标小区排在最后；
相应的， 计时模块 305 , 用于接收开始计时信息， 开始计时； 接收停止 计时信息， 停止计时；
网络接入模块 304, 用于在接入目标小区时， 向搜索配置模块 301发送 允许接入信息； 离开目标小区的网络覆盖范围， 向搜索配置模块 301 发送 离开目标小区信息。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围， 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种不同网络制式间切换的方法， 其特征在于， 该方法包括： 终端在需要切换时， 对历史记录中与当前离开小区相符的源小区所对 应的目标小区进行排序， 形成搜索列表， 根据搜索列表选取目标小区并接 入。
2、 根据权利要求 1所述的方法， 其特征在于， 所述对历史记录中与当 前离开小区相符的源小区所对应的目标小区进行排序之前， 该方法进一步 包括：
终端将当前离开小区的小区标识与历史记录中源小区的小区标识比 较， 若与历史记录中其中一个源小区的小区标识相符， 则确定当前离开小 区属于源小区。
3、 根据权利要求 1或 2所述的方法， 其特征在于， 所述终端对历史记 录中与当前离开小区相符的源小区所对应的目标小区进行排序， 形成搜索 列表包括：
终端根据源小区切换到目标小区切换成功的次数， 对目标小区进行排 序， 形成搜索列表；
执行以下步骤中的一个或多个， 对目标小区进行排序：
终端结合源小区切换到目标小区切换失败的次数， 将切换失败的次数 达到设定值的目标小区的排序推后；
终端结合目标小区的信号质量， 将信号质量达到排序提前设定值的目 标小区的排序提前， 将信号质量达到排序推后设定值的目标小区的排序推 后；
终端结合在目标小区的驻留时间， 若驻留时间小于设定时间， 将目标 小区排在最后。
4、 根据权利要求 3所述的方法， 其特征在于， 该方法进一步包括： 终端接入目标小区失败， 或终端没有接收到目标小区的信号时， 若确 定搜索列表中的目标小区未被搜索完毕， 继续选取下一目标小区接入， 若 确定搜索列表中的目标小区已被搜索完毕， 逐个搜索终端所支持的频点并 接入小区。
5、 根据权利要求 3所述的方法， 其特征在于， 所述结合终端在目标小 区的驻留时间为： 将终端接入目标小区到离开目标小区之间的时间作为终 端在目标小区的驻留时间， 比较驻留时间与设定时间， 驻留时间小于设定 时间时， 将目标小区排在最后。
6、 根据权利要求 4所述的方法， 其特征在于， 该方法进一步包括： 终端接入目标小区， 或终端接入目标小区失败， 或终端逐个搜索所支 持的频点并接入小区时， 终端更新历史记录。
7、 一种不同网络制式间切换的装置， 该装置包括接收模块、 网络接入 模块， 其特征在于， 该装置还包括： 搜索配置模块、 记录模块；
搜索配置模块， 用于对记录模块的历史记录中与当前离开小区相符的 源小区所对应的目标小区进行排序， 形成搜索列表， 根据搜索列表， 选取 目标小区， 配置接收模块；
记录模块， 用于保存历史记录。
8、 根据权利要求 7所述的装置， 其特征在于，
搜索配置模块进一步用于， 将当前离开小区的小区标识同记录模块的 历史记录中的源小区的小区标识比较， 若与历史记录中的其中一个源小区 的小区标识相符， 则当前离开小区属于源小区。
9、 根据权利要求 7或 8所述的装置， 其特征在于，
所述搜索配置模块具体用于， 根据源小区切换到目标小区切换成功的 次数， 对目标小区进行排序， 形成搜索列表；
结合以下情况中的一种或多种， 对目标小区进行排序： 结合源小区切换到目标小区切换失败的次数， 将切换失败的次数达到 设定值的目标小区的排序推后；
结合目标小区的信号质量， 将信号质量达到排序提前设定值的目标小 区的排序提前， 将信号质量达到排序推后设定值的目标小区的排序推后； 结合终端在目标小区的驻留时间， 若驻留时间小于设定时间， 将目标 小区排在最后， 形成搜索列表。
10、 根据权利要求 9所述的装置， 其特征在于，
所述搜索配置模块具体用于， 接收接收模块发送的接收不到信号的信 息； 或者网络接入模块发送的拒绝接入的信息， 若确定搜索列表中的目标 小区没有搜索完毕， 继续选取下一目标小区， 根据下一目标小区信息配置 接收模块； 若确定搜索类别中的目标小区已经搜索， 逐个选取自身支持的 频点配置接收模块。
11、 根据权利要求 9所述的装置， 其特征在于， 该装置进一步包括： 搜索配置模块， 进一步用于接入目标小区时， 向计时模块发送开始计 时信息； 离开目标小区时， 向计时模块发送停止计时信息， 读取计时模块 的计时时间作为在目标小区的驻留时间， 保存在记录模块的历史记录中， 将驻留时间与设定时间比较， 小于设定时间时将目标小区排在最后；
计时模块， 用于接收开始计时信息， 开始计时； 接收停止计时信息， 停止计时。
12、 根据权利要求 10所述的装置， 其特征在于，
所述搜索配置模块进一步用于， 接收网络接入模块发送的接入目标小 区或接入小区的信息， 更新历史记录； 接收网络接入模块发送的拒绝接入 的信息， 更新历史记录。
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US20120315900A1 (en) 2012-12-13
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