WO2010031258A1 - 小区重选方法和终端 - Google Patents

小区重选方法和终端 Download PDF

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Publication number
WO2010031258A1
WO2010031258A1 PCT/CN2009/071266 CN2009071266W WO2010031258A1 WO 2010031258 A1 WO2010031258 A1 WO 2010031258A1 CN 2009071266 W CN2009071266 W CN 2009071266W WO 2010031258 A1 WO2010031258 A1 WO 2010031258A1
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Prior art keywords
cell
priority
reselection
frequency
same priority
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PCT/CN2009/071266
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English (en)
French (fr)
Inventor
黄亚达
杜忠达
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.)
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42029814&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2010031258(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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 RU2011108042/07A priority Critical patent/RU2476011C2/ru
Priority to US13/062,080 priority patent/US8761776B2/en
Priority to JP2011524166A priority patent/JP5912528B2/ja
Priority to EP09813979A priority patent/EP2337396A4/en
Publication of WO2010031258A1 publication Critical patent/WO2010031258A1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present invention relates to the field of communications, and in particular, to a cell reselection method and terminal.
  • a terminal performs cell handover and cell reselection, which is an important technology. Specifically, when a user equipment (User Equipment, UE for short) leaves a cell and enters another cell, the terminal The received signal of the original cell will gradually weaken, and the received signal of the incoming cell will gradually increase. In order to maintain the quality of the received signal of the terminal, the terminal will switch from the original base station to the new incoming signal. Base station. For a connected terminal, the conversion between the base stations is called handover.
  • User Equipment User Equipment
  • the terminal For the terminal in the idle state, the change of the terminal resident cell is completed by the cell reselection process. Therefore, the terminal needs to detect the target cell, and Cell reselection is performed in a cell that meets the requirements.
  • the terminal measures the signal quality of different cells, and compares the measured signal quality with the signal quality threshold of the resident cell, if the measured signal is obtained. The quality continuously reaches the reselection criterion within a certain period of time, and the terminal reselects to the cell.
  • the terminal when performing cell reselection, the terminal needs to measure signal level or signal quality of the local cell and the neighboring cell, and then map the measured value of the current cell to the cell reselection evaluation value Rs, where the neighboring cell to be tested is to be tested. The measured values are mapped to Rn. The Rs and all the Rn values are sorted and compared, and the cell ranked first is the radio signal quality optimal cell. When the optimal cell is not the current cell where the terminal camps, the terminal will reselect the cell. The calculation method of the Rs and the Rn is determined by the protocol, and the related parameters related to the calculation are sent by the broadcast channel of the resident cell to the terminal.
  • the evolved Evolved Universal Terrestrial Radio Access Network (E-UTRAN) system of the third generation mobile communication Long Term Evolution (LTE) system continues to use the above cell reselection method.
  • the level offset value of the cell after completing the calculation, the terminal sorts all the R values, and the first cell is the best cell, and the terminal reselects the best cell, but considering the neighboring cell weight
  • the difficulty of selection in addition to the radio quality of the cell, depends on the value of Qoffset.
  • the above-mentioned sorting reselection method by R is called an offset-based cell reselection method. Since the offset-based cell reselection method needs to measure neighboring cells in all frequencies and frequencies, the terminal consumes more power. Since the terminal needs to switch the resonance frequency of the receiver to the different frequency points, the same frequency measurement is not needed.
  • LTE groups all the neighboring cells by frequency, and the terminal first sorts the priority according to the absolute priority of the frequency points to find the highest priority. a frequency point of the stage, and then selecting a cell according to the offset-based cell reselection method within the frequency point. This reselection method is called a priority-based reselection method, and the selected cell should satisfy the following conditions.
  • nServin g Ce ii, x values are greater than the threshold Thresh x , h igh during the Treselection RAT time.
  • x is represented by; then frequency A, nonServingCell is represented; then 'J, zone, S nonServ i ngCell , x means quilt; then 'J, zone measurement level, TreselectionRAT means ' ⁇ , zone reselection measurement time, Thresh x , high means to reselect the threshold to the high priority frequency. If the above conditions are met, it is possible to be selected as the reselected cell, and the cell needs to pay attention to the following points when selecting the reselected cell:
  • the Snonservingcei value When the Snonservingcei value is greater than the threshold Thresh xJow during the Treselection RAT time, it is reselected to the cell.
  • X represents the measured low priority frequency
  • x represents the measured level of the measured cell
  • TreselectionRAT means ' ⁇ zone reselection measurement time
  • Threshxjcw indicates that the threshold is reselected to the lower priority frequency.
  • the terminal selects the best cell as the target cell for reselection.
  • the priority-based reselection method only defines that the terminal selects the cell reselection method according to the offset (based on the R value ranking method) for the same frequency point. Choose the best community.
  • the priority-based reselection method only defines that the terminal selects the cell reselection method according to the offset (based on the R value ranking method) for the same frequency point. Choose the best community.
  • the present invention has been made in view of the problem of how to select a reselected cell within these cells when there are several cells in the same priority frequency that satisfy the reselection condition. For this reason, the main The purpose is to provide a cell reselection method and terminal to solve the above problems in the related art.
  • a cell reselection method is provided for a terminal to reselect a cell in a plurality of frequency points of the same priority.
  • the cell reselection method according to the present invention includes: setting cells in a plurality of frequency points of the same priority as the same priority cell.
  • the terminal when performing cell reselection, selects cells in multiple frequency points with the same priority according to the priority reselection principle; the terminal selects the reselected cell from the same priority cell based on the reselection principle of the best cell.
  • the above-mentioned same-priority cell specifically includes one of the following: a cell in a plurality of frequency points having the same priority and higher than the priority of the preserving frequency point; and a plurality of frequencies having the same priority JM than the frequency-preferred frequency priority a cell within a point; a camping cell, a camping frequency point, and a cell within one or more frequency points having the same priority as the camping frequency point.
  • the priority of the same priority cell is equal to the absolute priority of the corresponding frequency point.
  • the reselection principle of the best cell described above is: an offset-based cell reselection principle.
  • a terminal is provided for reselecting cells in a plurality of frequency points having the same priority.
  • the terminal includes: a first reselection module, configured to: when a cell performs reselection, select, according to a priority reselection principle, a cell at a plurality of frequency points having the same priority, wherein, the priority The cells in the same multiple frequency points are the same priority cell; the second reselection module is configured to select the reselected cell from the same priority cell based on the reselection principle of the best cell.
  • the same priority cell specifically includes one of the following: a cell in multiple frequency points with the same priority and higher priority than the preserving frequency point; multiple frequency points with the same priority and lower priority than the preserving frequency point a cell within the camp; a camping cell, a camping frequency point, and a cell within one or more frequency points having the same priority as the camping frequency point.
  • the priority of the same priority cell is equal to the absolute priority of the corresponding frequency point.
  • the first reselection module is specifically configured to select a cell at a frequency with a higher priority according to the frequency priority.
  • the reselection principle of the best cell described above is: an offset-based cell reselection principle.
  • FIG. 1 is a flow chart of a cell reselection method according to an embodiment of the present invention
  • FIG. 2 is a block diagram of a terminal according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Currently, in the related art, the priority-based reselection method only defines a cell reselection method for a cell within one frequency point, and there is no definition that there are a plurality of the same priority frequency points.
  • the present invention proposes a technical solution for cell reselection, in which cells in multiple frequency points of the same priority are set as the same priority cell. Moreover, when performing cell reselection, the terminal first selects cells in one or more frequency points with the same priority according to the priority reselection principle, and then selects from the same priority cell based on the reselection principle of the best cell. Reselect the cell.
  • FIG. 1 is a flowchart of a cell reselection method according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps: Step S102: When performing cell reselection, the terminal uses a priority-based reselection principle to select a priority. A cell at a plurality of frequency points having the same level, wherein cells in a plurality of frequency points having the same priority are the same priority cells.
  • step S102 using the priority-based reselection principle to perform the same priority cell selection means that the terminal can preferentially select the cell under the frequency with high priority according to the frequency priority.
  • the same priority cell may be a cell in multiple frequency points with the same priority and higher priority than the preserving frequency point, or may be the same priority and lower than the preserving frequency priority.
  • the cells in multiple frequency points may also be a camped cell, a camping frequency point, and a cell within one or more frequency points having the same priority as the camping frequency point.
  • the priority of the same priority cell is equal to the absolute priority of the corresponding frequency point.
  • Step S104 The terminal selects a reselected cell from the same priority cell based on the reselection principle of the best cell.
  • the reselection principle of the foregoing best cell is: an offset-based cell reselection principle (the offset-based cell reselection principle has been described in detail in the background art, and details are not described herein again).
  • Example 1 reselecting to a high priority frequency point.
  • Frequency points F-al and F_a2 are high-priority frequencies with the same priority, C-al-1, C_al_2 It is the cell on the frequency point F-al, and C-a2-1 is the cell on the frequency point F-a2.
  • the current terminal resides on the frequency point F-bl, and the priority of F-bl is higher than F-al, F-a2.
  • C-b 1-1 is the resident cell of the terminal.
  • the terminal periodically measures the inter-frequency cells C-al-1, C-al-2 and C-a2-1.
  • the inter-frequency cell When the time Treselection E UTRAN, the inter-frequency cell satisfies S c — al — 1; F — al > Thresh F — al , high , Sc_ai_2 , F_ai>Thresh F a 1, high and S C a2_l , F_a2>ThresliF a2,high ' ie three high priority cells satisfy the reselection condition at the same time (reselection condition is: last measured frequency)
  • the S n of the cell, nServingCell where the value of x is greater than the threshold Thresh x , high ) in the Treselection RAT time, the terminal needs to reselect to one of the three cells according to the priority-based reselection method, where C-al-1, C-al-2 and C_a2_l belong to the same priority cell, and calculate R c — al — according to the principle of offset-based cell
  • Rc-al-2 and Rc-a2-1 are sorted, then R C - al - 2 is the largest, then C_al_2 is the best cell, and the terminal is re-selected to cell C - al - 2.
  • the terminal is enabled to perform cell reselection to the high priority frequency point in the manner specified by the present invention.
  • Example 2 reselecting to a lower priority frequency point.
  • the frequency points F- cl and F_c2 are low priority frequency points of the same priority
  • C-cl-1 is the cell on the frequency point F-cl
  • C-c2-1 is the cell on the frequency point F-c2.
  • the current terminal resides on the frequency point F-bl, and the priority of F-bl is higher than F-cl, F-c2.
  • C—bl—1 is the camping cell
  • F—b2 is the frequency with the same priority as the camping frequency point
  • C—b2—1 is the cell at the frequency point
  • S c — bl is lower than the threshold Thresh c — Bl u .
  • C—b2—1 does not satisfy the reselection condition. Since there is no frequency point with a higher priority than F-bl at this time, the terminal needs to start considering reselection to the low priority frequency points F_cl and F_c2.
  • a terminal is provided for reselecting cells in a plurality of frequency points having the same priority.
  • the apparatus may be used to implement the cell reselection method provided by the foregoing method embodiments.
  • 2 is a block diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 2, the first reselection module 20 and the second reselection module 22 are included.
  • the first reselection module 20 and the second The reselection module 22 may also be provided in a unified manner.
  • a separate arrangement is adopted, and the above two modules will be described in detail below.
  • the first reselection module 20 is configured to: when the cell performs cell reselection, select a cell at a plurality of frequency points with the same priority according to the priority reselection principle, where the frequency is at a plurality of frequency points with the same priority
  • the cell is the same priority cell; wherein the priority-based reselection principle performs the same priority cell selection: the first reselection module 20 can select multiple frequency points with the same priority according to the priority reselection method.
  • the next cell may be a cell in multiple frequency points with the same priority and higher priority than the preserving frequency point, or may be the same priority and lower than the preserving frequency priority.
  • the cells in multiple frequency points may also be a camped cell, a camping frequency point, and a cell within one or more frequency points having the same priority as the camping frequency point. Moreover, the priority of the same priority cell is equal to the absolute priority of the corresponding frequency point.
  • the second reselection module 22 is coupled to the first reselection module 20 for selecting a reselected cell from within the same priority cell selected by the first reselection module 20 using the best cell based reselection principle.
  • the reselection principle of the foregoing best cell is: an offset-based cell reselection principle (the offset-based cell reselection principle has been described in detail in the background art, and details are not described herein again).

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Mobile Radio Communication Systems (AREA)

Description

小区重选方法和终端
技术领域 本发明涉及通信领域， 并且特别地， 涉及一种小区重选方法和终端。 背景技术 目前， 在蜂窝移动通讯系统中， 终端进行小区切换和小区重选是一项重 要的技术， 具体地， 当用户终端 （User Equipment, 简称为 UE ) 离开一个小 区进入另一个小区时， 终端所接收到的原小区的信号会逐渐减弱， 而接收到 的正在进入的小区的信号会逐渐增强， 为了保持终端接收信号的质量， 该终 端会由原来的基站转换到新进入的信号较强的基站。 对于连接态的终端，这种基站之间的转换称为切换，对于空闲态的终端， 终端驻留小区的变更是通过小区重选过程来完成的， 因此， 终端需要对目标 小区进行检测， 并在符合要求的小区中进行小区重选。 在第三代 （3rd Generation, 简称为 3G ) 移动通讯系统中， 终端对不同 小区的信号质量进行测量， 并将测量到的信号质量和驻留小区的信号质量门 限进行比较， 如果测量得到的信号质量在一定时间内连续到达重选准则， 则 终端重选到该小区。 具体地， 终端在进行小区重选时， 需要测量本小区以及相邻小区的信号 电平或者信号质量， 再将本小区测量值映射为小区重选评估值 Rs , 将被测的 相邻小区的测量值映射为 Rn。 并将 Rs和所有的 Rn值排序比较， 排在第一 位的小区就是无线信号质量最优小区， 当最优小区不是终端驻留的当前小区 时， 终端将重选到该小区。 其中， Rs和 Rn的计算方法由协议确定， 涉及计 算的相关参数由驻留小区的广播信道下发到终端。 第三代移动通信长期演进 ( Long Term Evolution, 简称为 LTE ) 系统的 演进的通用 1¾地无线接入网 （Evolved Universal Terrestrial Radio Access Network, 简称为 E-UTRAN ) 系统继续使用上述的小区重选方法进行同频小 区重选。 具体地， 终端需要计算 Rs=Qmeas,s+Qhysts , Rn=Qmeas,n - Qoffset, 其中， s表示驻留小区， n表示相邻小区， Qmeas,s表示驻留小区的测量电平， Qmeas,n是相邻小区的测量电平， Qhysts表示服务小区迟滞， Qoffset是相邻 小区的电平偏移值， 在完成计算后， 终端将所有的 R值进行排序， 排在第一 位的即是最好的小区， 终端重选最好小区， 但是， 考虑到相邻小区重选的难 易程度， 除了小区的无线质量外， 还取决于 Qoffset的取值大小， 因此， 上述 通过 R的排序重选方法称为基于偏移的小区重选方法。 由于基于偏移的小区重选方法需要测量所有频内和频间的相邻小区，导 致终端消耗较多的电能。 由于终端对不同频点的测量需要切换接收机的共振 频点， 而同频测量则不需要， LTE将所有的相邻小区按频率分组， 终端首先 基于频点的绝对优先级排序， 找到最高优先级的频点， 然后在该频点内按基 于偏移的小区重选方法选定一个小区， 这种重选方法被称为基于优先级的重 选方法， 被选择的小区应该满足以下的条件： 被测频中一个小区的 Sn。nServingCeii,x值在 TreselectionRAT时间内都大于门限值 Threshx,high。 其中， x 表示被；则频 A , nonServingCell表示被；则 'J、区， SnonServingCell,x表示被；则 'J、区 测量电平， TreselectionRAT表示 '〗、区重选测量时间， Threshx,high表示向高优先 级频点重选门限。 满足了上述条件， 才有可能被选择为重选小区， 并且， 小 区在选择重选小区时， 还需要注意以下几点：
1、 如果一个高优先级频点内的某一小区满足上述条件， 并且终端在当 前驻留小区已经驻留 1秒钟以上， 则重选到该小区。
2、 当驻留频点以及与驻留频点具有相同优先级的频点内没有可重选小 区， 也没有高优先级频点小区满足上述条件， 并且， 驻留小区的测量电平 SservingCell低于门限
Figure imgf000004_0001
, 当被测低优先级频点上一个小区的
Snonservingcei 值在 TreselectionRAT时间内都大于门限值 ThreshxJow时， 则重选 到该小区。 其中， X表示被测低优先级频点， Sn。nServingCeii,x表示被测小区的测 量电平， TreselectionRAT表示 '〗、区重选测量时间，
Figure imgf000004_0002
表示驻留小区 低电平门限， Threshxjcw表示向低优先级频点重选门限。 3、 对于同频小区和同优先级频点小区内重选， 按照基于偏移的小区重 选方法重选。
4、 在一个频点内有多个小区满足上述条件时， 终端选择最好小区作为 重选的目标小区。 从上述的描述可以看出， 在相关技术中， 基于优先级的重选方法仅定义 了对于同一频点内， 终端按照偏移的小区重选方法（基于 R值排序方法）选 择最好小区。 但是， 当有多个相同优先级频点内各有若干个满足基于优先级 重选方法的重选条件的小区时， 如何在这些小区内进行小区重选， 相关技术 中尚未提出有效的解决方案。 发明内容 考虑到当有数个相同优先级的频点内各有若干个满足重选条件的小区 时， 如何在这些小区内选择重选小区的问题而做出本发明， 为此， 本发明的 主要目的在于提供一种小区重选方法和终端， 以解决相关技术中存在的上述 问题。 才艮据本发明的一个方面， 提供了一种小区重选方法， 用于终端对多个相 同优先级的频点内的小区进行重选。 才艮据本发明的小区重选方法包括：将多个相同优先级的频点内的小区设 置为同优先级小区。 此外， 终端在进行小区重选时， 基于优先级的重选原则选择优先级相同 的多个频点下的小区； 终端基于最好小区的重选原则， 从同优先级小区内选 择重选小区。 其中， 上述同优先级小区具体包括以下之一： 优先级相同且高于驻留频 点优先级的多个频点内的小区； 优先级相同 JM氐于驻留频点优先级的多个频 点内的小区； 驻留小区、 驻留频点、 以及与驻留频点具有相同优先级的一个 或多个频点内的小区。 其中， 上述同优先级小区的优先级等于相应频点的绝对优先级。 其中， 上述最好小区的重选原则为： 基于偏移的小区重选原则。 才艮据本发明的另一方面， 提供了一种终端， 用于对多个具有相同优先级 的频点内的小区进行重选。 才艮据本发明的终端包括： 第一重选模块， 用于终端在进行小区重选时， 基于优先级的重选原则选择优先级相同的多个频点下的小区， 其中， 在优先 级相同的多个频点下的小区为同优先级小区； 第二重选模块， 用于基于最好 小区的重选原则， 从同优先级小区内选择重选小区。 其中， 同优先级小区具体包括以下之一： 优先级相同且高于驻留频点优 先级的多个频点内的小区； 优先级相同且低于驻留频点优先级的多个频点内 的小区； 驻留小区、 驻留频点、 以及与驻留频点具有相同优先级的一个或多 个频点内的小区。 其中， 同优先级小区的优先级等于相应频点的绝对优先级。 其中，第一重选模块具体用于才艮据频点优先级选择优先级高的频点下的 小区。 其中， 上述最好小区的重选原则为： 基于偏移的小区重选原则。 借助于本发明的技术方案，通过在选择了优先级相同的多个频点下的小 区后再选择最优小区， 使得终端能够按照确定的方式快速的进行小区重选， 并且能够使得网络参数的配置达到预期的目的。 本发明的其它特征和优点将在随后的说明书中阐述， 并且， 部分地从说 明书中变得显而易见， 或者通过实施本发明而了解。 本发明的目的和其他优 点可通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结构来实 现和获得。 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是才艮据本发明实施例的小区重选方法的流程图； 图 2是才艮据本发明实施例的终端的框图。 具体实施方式 功能相克述 目前， 在相关技术中， 基于优先级的重选方法仅定义了对于一个频点内 小区的小区重选方法， 并没有定义存在多个相同优先级频点内各有若干个满 足基于优先级重选条件的小区的情况下小区重选的方法， 因此， 针对上述问 题， 本发明提出了一种小区重选的技术方案， 将多个相同优先级的频点内的 小区设置为同优先级小区。 并且， 终端在进行小区重选时， 首先基于优先级 的重选原则选择优先级相同的一个或多个频点下的小区， 再基于最好小区的 重选原则， 从同优先级小区内选择重选小区。 以下结合附图对本发明的优选实施例进行说明， 应当理解， 此处所描述 的优选实施例仅用于说明和解释本发明， 并不用于限定本发明。如果不沖突， 本发明实施例及实施例中特征可以相互组合。 方法实施例 根据本发明的实施例， 提供了一种小区重选方法， 用于终端对多个相同 优先级的频点内的小区进行重选。 图 1是才艮据本发明实施例的小区重选方法 的流程图， 如图 1所示， 包括以下处理： 步骤 S102 , 终端在进行小区重选时， 使用基于优先级的重选原则选择 优先级相同的多个频点下的小区， 其中， 在优先级相同的多个频点下的小区 为同优先级小区。 在步骤 S102中， 使用基于优先级的重选原则进行同优先级小区选择是 指： 终端可以才艮据频点优先级， 优先选择优先级高的频点下的小区。 此外， 在实际的应用中， 同优先级小区可以为优先级相同且高于驻留频 点优先级的多个频点内的小区， 也可以为优先级相同且低于驻留频点优先级 的多个频点内的小区， 也可以是驻留小区、 驻留频点、 以及与驻留频点具有 相同优先级的一个或多个频点内的小区。 并且， 同优先级小区的优先级等于 相应频点的绝对优先级。 步骤 S104 , 终端基于最好小区的重选原则， 从同优先级小区内选择重 选小区。 其中， 上述最好小区的重选原则为： 基于偏移的小区重选原则 （基 于偏移的小区重选原则在背景技术中已经进行了详细的说明， 此处不再赘 述）。 下面结合实例， 对本发明的上述技术方案进行详细的说明。 实例 1 , 向高优先级频点重选。 频点 F— al、 F_a2是具有相同优先级的高优先级频点， C— al— 1、 C_al_2 是频点 F— al上的小区， C— a2— 1是频点 F— a2上的小区。 当前终端驻留在频点 F— b l上， 并且， F— b l 的优先级比 F— al、 F— a2 氐。 C—b 1—1是终端的驻留小 区。 终端周期性测量异频小区 C— al— 1、 C— al— 2 和 C— a2— 1 , 当在时间 TreselectionE UTRAN 内 ， 异 频 小 区 满 足 Sc— al— 1;F— al>ThreshF— al,high , Sc_ai_2,F_ai>ThreshF a 1, high和 SC a2_l ,F_a2>ThresliF a2,high ' 即三个高优先级小区同 时满足重选条件 （重选条件为： 被测频上一个小区的 Sn。nServingCell,x值在 TreselectionRAT时间内都大于门限值 Threshx，high ), 则按基于优先级的重选方 法， 终端需要重选到这 3 个小区中的一个上去， 其中， C— al— 1、 C— al— 2和 C_a2_l属于相同优先级小区， 按基于偏移的小区重选原则， 在计算 Rc— al— ,
Rc— al— 2和 Rc— a2— 1后进行排序， 此时 RC— al— 2最大， 则 C_al_2是最好小区， 终 端重选至小区 C— al— 2。 通过上述的处理， 实现了终端按照本发明规定的方式， 向高优先级频点 进行小区重选。 实例 2 , 向低优先级频点重选。 频点 F— cl、 F_c2是相同优先级的低优先级频点， C— c l— 1是频点 F— cl 上的小区， C— c2— 1是频点 F— c2上的小区。 当前终端驻留在频点 F— b l上， F— b l 的优先级比 F— cl、 F— c2高。 C— b l— 1是驻留小区， F— b2是与驻留频点 优先级相同的频点， C— b2— 1 是该频点上的小区， 在 Sc— bl 低于门限 Threshc— bl u。w时， C— b2— 1不满足重选条件。 由于此时不存在优先级比 F— b l 高的频点， 终端需要开始考虑向低优先 级频点 F— cl 、 F_c2 重选， 当在时间 TreselectionE— UTRAN 内 ，满足 Sc— cl LF cl>ThreshF— cl,low和 Sc c2 l ,F c2>ThresliF c2,low， 即， 两个低优先级小区同 时满足重选条件， 则按基于优先级的重选方法， 终端需要重选到这 2个小区 中的一个上去。 C— cl— 1和 C— c2— 1属于相同优先级小区， 按基于偏移的小区 重选原则， 计算 Rc— cl 和 Rc— c2 并排序， 此时 Rc— cl 最大， 则 C— cl— 1是最 好小区， 终端重选至小区 C cl 1。 通过上述的处理， 实现了终端按照本发明规定的方式， 向低优先级频点 进行小区重选。 装置实施例 根据本发明的实施例， 提供了一种终端， 用于对多个具有相同优先级的 频点内的小区进行重选。 该装置可以用于实现上述方法实施例所提供的小区 重选方法。 图 2是根据本发明实施例的终端的框图， 如图 2所示， 包括第一重选模 块 20、 第二重选模块 22, 在实际的应用中， 上述第一重选模块 20、 第二重 选模块 22 也可以合一设置， 但是， 在本实施例中， 为了更清楚的说明本发 明的技术方案， 采用分开设置的方式， 下面， 对上述两个模块进行详细的说 明。 第一重选模块 20, 用于终端在进行小区重选时， 基于优先级的重选原 则选择优先级相同的多个频点下的小区， 其中， 在优先级相同的多个频点下 的小区为同优先级小区； 其中， 基于优先级的重选原则进行同优先级小区选择是指： 第一重选模 块 20可以才艮据基于优先级重选方法选择优先级相同的多个频点下的小区。 此外， 在实际的应用中， 同优先级小区可以为优先级相同且高于驻留频 点优先级的多个频点内的小区， 也可以为优先级相同且低于驻留频点优先级 的多个频点内的小区， 也可以是驻留小区、 驻留频点、 以及与驻留频点具有 相同优先级的一个或多个频点内的小区。 并且， 同优先级小区的优先级等于 相应频点的绝对优先级。 第二重选模块 22 , 连接至第一重选模块 20, 用于使用基于最好小区的 重选原则， 从第一重选模块 20 选择出的同优先级小区内选择重选小区。 其 中， 上述最好小区的重选原则为： 基于偏移的小区重选原则 （基于偏移的小 区重选原则在背景技术中已经进行了详细的说明， 在此不再赘述）。 综上所述， 借助于本发明的技术方案， 通过选择优先级相同的一个或多 个频点下的小区， 再选择最优小区， 解决了如何在多个相同优先级的频点内 的若干个满足重选条件的小区进行小区重选的问题， 使得终端能够按照确定 的方式快速的进行小区重选，并且能够使得网络参数的配置达到预期的目的。 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^^申和 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. 一种小区重选方法， 用于终端对多个相同优先级的频点内的小区进行重 选， 其特征在于， 所述方法包括：
将所述多个相同优先级的频点内的小区设置为同优先级小区。
2. 才艮据权利要求 1所述的方法， 其特征在于， 所述方法进一步包括：
终端在进行小区重选时，基于优先级的重选原则选择优先级相同的 多个频点下的小区；
所述终端基于最好小区的重选原则，从所述同优先级小区内选择重 选小区。
3. 才艮据权利要求 2所述的方法， 其特征在于， 所述同优先级小区具体包括 以下之一：
优先级相同且高于驻留频点优先级的多个频点内的小区； 优先级相同 JM氐于所述驻留频点优先级的多个频点内的小区； 驻留小区、 所述驻留频点、 以及与所述驻留频点具有相同优先级的 一个或多个频点内的小区。
4. 根据权利要求 3所述的方法， 其特征在于， 所述同优先级小区的优先级 等于相应频点的绝对优先级。
5. 根据权利要求 2所述的方法， 其特征在于， 所述最好小区的重选原则为： 基于偏移的小区重选原则。
6. 一种终端， 用于对多个具有相同优先级的频点内的小区进行重选， 其特 征在于， 所述终端包括：
第一重选模块， 用于终端在进行小区重选时， 基于优先级的重选原 则选择优先级相同的多个频点下的小区， 其中， 在所述优先级相同的多 个频点下的小区为同优先级小区；
第二重选模块， 用于基于最好小区的重选原则， 从所述同优先级小 区内选择重选小区。
7. 根据权利要求 6所述的终端， 其特征在于， 所述同优先级小区具体包括 以下之一：
优先级相同且高于驻留频点优先级的多个频点内的小区； 优先级相同 JM氐于所述驻留频点优先级的多个频点内的小区； 驻留小区、 所述驻留频点、 以及与所述驻留频点具有相同优先级的 一个或多个频点内的小区。
8. 根据权利要求 7所述的终端， 其特征在于， 所述同优先级小区的优先级 等于相应频点的绝对优先级。
9. 根据权利要求 6所述的终端， 其特征在于， 所述第一重选模块具体用于 才艮据频点优先级选择优先级高的频点下的小区。
10. 根据权利要求 6所述的终端， 其特征在于， 所述最好小区的重选原则为： 基于偏移的小区重选原则。
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US8761776B2 (en) 2014-06-24
EP2337396A1 (en) 2011-06-22
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