WO2012051856A1 - 一种频点排序方法以及相关设备 - Google Patents

一种频点排序方法以及相关设备 Download PDF

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Publication number
WO2012051856A1
WO2012051856A1 PCT/CN2011/075082 CN2011075082W WO2012051856A1 WO 2012051856 A1 WO2012051856 A1 WO 2012051856A1 CN 2011075082 W CN2011075082 W CN 2011075082W WO 2012051856 A1 WO2012051856 A1 WO 2012051856A1
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Prior art keywords
frequency
frequency point
frequency points
points
signal strength
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PCT/CN2011/075082
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English (en)
French (fr)
Inventor
傅杰
Original Assignee
展讯通信(上海)有限公司
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Publication date
Application filed by 展讯通信(上海)有限公司 filed Critical 展讯通信(上海)有限公司
Priority to DE112011100149.5T priority Critical patent/DE112011100149B4/de
Priority to US13/574,560 priority patent/US8391795B2/en
Publication of WO2012051856A1 publication Critical patent/WO2012051856A1/zh
Priority to IN6624DEN2012 priority patent/IN2012DN06624A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition

Definitions

  • the present invention relates to the field of communications, and in particular, to a frequency point sorting method and related equipment.
  • Wireless communication systems are widely used in various areas of urban and rural areas to provide various communication contents such as voice, video, packet data, messaging, and broadcasting.
  • a plurality of cells may be included in a wireless communication system.
  • a cell may refer to a minimum coverage area of a node and/or a subsystem of the node serving the coverage area.
  • the mobile terminal When the mobile terminal just powers up or just loses the signal covering the cell, it can search for the cell where the current mobile terminal is located, and the cell is called a serving cell.
  • the mobile terminal periodically and continuously measures the signal strength of the broadcast control channel (BCCH, Broadcast Common Control Channel) carrier of the serving cell and the neighboring cell, so that when other cell signals are measured to be stronger than the current cell signal, the mobile terminal can timely Switch to the past.
  • BCCH Broadcast Common Control Channel
  • the mobile terminal generates a candidate list through the system message acquisition of the serving cell, which is called a BCCH allocation table, which is a neighboring cell BCCH frequency list of a cell.
  • the BCCH allocation table has frequency points indicated by the network that can be used for cell reselection. These frequency points are used as candidate frequency points of the mobile terminal, and the mobile station periodically measures and synchronizes these frequency points, and receives system messages of the BCCH channel. Used for cell reselection.
  • the number of candidate frequencies in the BCCH allocation table is configured according to the network conditions. Some networks have more, some are less.
  • the BCCH allocation table is stored in a permanent register or SIM card in the mobile terminal for connection to the operation of the system at power on.
  • the interval frequency of the mobile terminal in the standby state and the call state measurement frequency point is different.
  • the mobile terminal When the mobile terminal is in the call state, the mobile terminal frequently searches for the frequency of the neighboring cell, so as to switch to the best frequency of the signal in time to maintain the call quality.
  • each SIM card uses the universal sorting algorithm to select the best 6 frequency points of the signal in its neighboring cell, and after 5 seconds, press the same algorithm. Reselect the best frequency points of the 6 signals in your neighboring cell for sorting. But many times, when the position of the mobile terminal does not move, the 6 frequencies of the first 5 seconds and the last 5 seconds are exactly the same. Or only some of the frequency changes, there is no need to reorder each time. Moreover, the current mobile terminal gradually appears to be able to read multiple SIM cards. Each SIM card needs to establish a BCCH allocation table, and also needs to search for multiple sets of candidate frequency points, resulting in a sharp calculation of the data of the mobile terminal. If the frequency point sorting method of the prior art is used, the response time of the mobile terminal will be seriously affected, resulting in a decrease in the performance index of the mobile terminal.
  • the normal risk data shows that in the actual network, the results of the two sortings are not much different: in the static case (that is, the mobile terminal does not move), in the adjacent two sorting results, only 90% of the cases are 90%. The following frequency changes;
  • the mobile terminal when the mobile terminal performs the neighbor cell search, it usually searches for 10 to 20 frequency points, and in the case of the three SIM card mobile terminals, the frequency points can reach 60.
  • Embodiments of the present invention provide a frequency point sorting method and related equipment for reducing the amount of operations of frequency point sorting.
  • the frequency point sorting method includes: 1) acquiring m frequency points with the strongest signal strength in the neighboring cell, as the candidate frequency point, the m is greater than 1; 2) after the preset duration, Obtain all n frequency points in the current neighboring cell; 3) Obtain a frequency point with the weakest signal strength in the candidate frequency point as the weakest frequency point; 4) select n frequency points except m frequency points Any X-frequency point; 5) comparing the X-frequency point with the weakest frequency point, if the signal strength of the X-frequency point is greater than the signal strength of the weakest frequency point, replacing the most The weak frequency point is used to update the candidate frequency point; 6) judging whether all the frequency points except the m frequency points of the n frequency points have been selected, and if not, repeating the above steps 3) to 5) If yes, the candidate frequency points are output; 7) the candidate frequency points are sorted according to the magnitude of the signal strength.
  • the frequency point sorting apparatus includes: a first acquiring unit, configured to acquire m frequency points with the strongest signal strength in the neighboring cell, as the candidate frequency point, where the m is greater than 1; a unit, configured to obtain all the n frequency points in the current neighboring cell after the preset duration, and a third acquiring unit, configured to acquire a frequency point with the weakest signal strength in the candidate frequency point, as the weakest frequency point Comparison list
  • the element is used to select any X frequency point other than m frequency points among the n frequency points after obtaining the weakest frequency point, and compare the X frequency point with the weakest frequency point, if the X frequency point If the signal strength is greater than the signal strength of the weakest frequency point, the replacement unit is triggered.
  • the determining unit is triggered; and the replacing unit is configured to use the X frequency point replacement unit.
  • the weakest frequency point is used to update the candidate frequency point; the determining unit is configured to determine whether all the frequency points except the m frequency points of the n frequency points have been selected, and if not, trigger the third acquiring unit If yes, trigger the output unit; the output unit is configured to output the current candidate frequency point; and the first sorting unit is configured to sort the output candidate frequency points according to the signal strength.
  • the frequency point sorting device acquires the frequency point of the weakest signal in the candidate frequency point as the weakest frequency point every preset time, and then uses the weakest frequency. Point compares the nm frequency points of the current neighboring cell. If the signal strength of the X frequency point in the nm frequency points is greater than the weakest frequency point, the X frequency point is used to replace the weakest frequency point, and the candidate frequency point is searched again.
  • FIG. 1 is a schematic flow chart of a frequency point sorting method according to an embodiment of the present invention
  • FIG. 2 is another schematic flowchart of a frequency point sorting method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram showing the logical structure of a frequency point sorting apparatus according to an embodiment of the present invention.
  • Embodiments of the present invention provide a frequency point sorting method and related equipment for reducing the amount of operations of frequency point sorting.
  • an embodiment of a frequency point ordering method according to an embodiment of the present invention includes:
  • the frequency sorting device acquires m frequency points with the strongest signal strength in the neighboring cell as the candidate frequency point, and m is greater than 1.
  • the value of m is 6, that is, the six frequency points with the strongest signal strength in the neighboring cell are obtained as the candidate frequency points, and the six frequency points are stored in the BCCH allocation table established by the mobile terminal, so that When the mobile terminal moves, it can find and switch the adjacent cell frequency point with the best signal strength from the candidate frequency points of the BCCH allocation table in time.
  • the frequency point sorting device needs to acquire all the n frequency points in the current neighboring cell, because the mobile terminal device needs to update the frequency of the current neighboring cell and the signal strength of the frequency point in time to ensure that the mobile terminal performs the When talking, you can switch to the frequency with the best signal strength for communication.
  • the frequency sorting device After the preset duration, the frequency sorting device searches for the frequency point of the m candidate frequencies with the weakest signal strength as the weakest frequency point.
  • step 105 After obtaining the weakest frequency point, select any X frequency points other than m frequency points among the n frequency points, and compare the X frequency point with the weakest frequency point, if the signal strength of the X frequency point is greater than the weakest The signal strength of the frequency point is triggered to step 105. If the signal strength of the X frequency point is less than the signal strength of the weakest frequency point, step 106 is triggered.
  • the X-frequency point is used to replace the weakest frequency point to update the candidate frequency point.
  • step 103 is triggered to continue the process of comparing the weakest frequencies.
  • the current m candidate frequency points are sorted, so that when the mobile terminal moves, it can switch to the frequency point of the current cell with the best signal strength.
  • the frequency point sorting device obtains the weakest frequency point of the candidate frequency point as the weakest frequency point every preset time period, and compares the weakest frequency point method and then uses the weakest frequency point comparison. If the signal intensity of the X-frequency point in the neighboring cell is greater than the weakest frequency point, the X-frequency point is used to replace the weakest frequency point, and the candidate frequency point is searched again.
  • the change of the strength of the point signal is small, so in the solution of the present invention, the weakest frequency point is not frequently replaced, and therefore, compared with the prior art, regardless of whether the signal strength of the current frequency point changes, it is always renewed.
  • the method of obtaining the strongest frequency points of m signals in n frequency points for sorting, the calculation amount of the frequency point sorting of the present invention is much smaller than the prior art.
  • Another embodiment of the frequency point sorting method of the present invention uses a bubbling algorithm as an example to describe the frequency point sorting method of the present invention.
  • another embodiment of the frequency point sorting method of the present invention includes:
  • the frequency sorting device acquires all k frequency points in the current neighboring cell, and k is greater than or equal to m.
  • the number of all frequency points of the current neighboring cell acquired by the frequency sorting device does not change, that is, the values of k and n are generally equal.
  • the frequency point sorting device uses the bubble algorithm to sequentially select m frequency points with the strongest signal strength among the k frequency points as the candidate frequency points; specifically:
  • the signal strengths of the adjacent two frequency points are compared in turn until the k frequency points are traversed, and the frequency point with the strongest signal strength is output, and the output strongest frequency point is ranked in the BCCH allocation table.
  • the frequency point sorting device needs to acquire all the n frequency points in the current neighboring cell, because the mobile terminal device needs to update the frequency of the current neighboring cell and the signal strength of the frequency point in time to ensure that the mobile terminal performs the When talking, you can switch to the frequency with the best signal strength for communication.
  • n frequency points After n frequency points are acquired, the frequency points overlapping with the candidate frequency points are marked in the n frequency points, and the repeated frequency points are not compared when traversing.
  • the frequency sorting device After the preset duration, acquires the frequency with the weakest signal strength among the m frequency points as the weakest frequency point.
  • the specific search method is:
  • the signal strengths of the adjacent two frequency points are compared in turn until the m frequency points are traversed, the frequency signal with the weakest signal strength is output, and the frequency point with the weakest signal strength is set. set to The weakest frequency point.
  • the preset duration is 5 seconds; when the mobile terminal is in the call state, the preset duration is 0.5 seconds.
  • step 206 After obtaining the weakest frequency point, traverse n frequency points in turn, select the frequency points that are not marked among the n frequency points as the X frequency point, and compare the X frequency point with the weakest frequency point, if the X frequency point If the signal strength is greater than the signal strength of the weakest frequency point, step 206 is triggered. If the signal strength of the X frequency point is less than the signal strength of the weakest frequency point, step 207 is triggered.
  • the frequency sorting device marks the frequency points that have been selected.
  • the X-frequency point is used to replace the weakest frequency point to update the candidate frequency point.
  • step 204 is triggered to continue the process of comparing the weakest frequencies.
  • the m candidate frequency points are sorted, so that when the mobile terminal moves, the frequency signal with the best signal strength of the current cell can be switched in time, specifically:
  • the signal intensity of the adjacent two frequency points is compared in turn until the m frequency points are traversed, and the frequency point with the strongest signal strength is output, and the output strongest frequency point is ranked in the BCCH allocation table.
  • the frequency point sorting method in the embodiment of the present invention is described by using a bubbling algorithm, and the prior art uses a bubbling algorithm to discharge the order of the strongest m points of the signal in n frequency points.
  • the number of cycles is about mxn-(1+m) xm/2 times. If the scheme of the embodiment of the present invention is adopted, the number of cycles is about mxt+(nm)+mx(m-1)/2 times, where t is the weakest frequency.
  • the number of times the point is replaced, the maximum value of t is equal to (nm), mxt is the number of cycles to find the weakest frequency point, and (nm) is the traversal nm
  • the number of cycles of the frequency points, mx ( m-1 ) /2 is the number of cycles of the alternate frequency points.
  • the normal data shows that after each BCCH allocation table is updated, in the static case (that is, the mobile terminal does not move), in the candidate frequency point, only 90 or less of the frequency points in the 90% of the cases are replaced; in the dynamic case ( That is, the mobile terminal moves.
  • the candidate frequency point In the 80% of the candidate frequency points, only 3 or less frequency points are replaced, and the mobile terminal generally searches for 10 to 20 frequency points when performing neighbor cell search.
  • the technical method requires a cycle of 99 times, and the present invention cycles 47 times; therefore, the frequency point sorting method in the embodiment of the present invention significantly reduces the amount of calculation of the mobile terminal compared to the prior art.
  • the mobile terminal When the mobile terminal is just powered on, the mobile terminal receives the frequency point information of the neighboring cell of the current location provided by the network broadcast, and the frequency information includes 15 frequency points of the neighboring cell, and the mobile terminal measures the 15 frequency.
  • the signal strengths of the adjacent two frequency points are compared in turn until the 15 frequency points are traversed, and the frequency point with the strongest signal strength is output;
  • the five frequency points with the strongest signal strength among the remaining frequency points are sequentially output.
  • the output frequency points are sequentially stored in the corresponding positions of the candidate frequency points of the BCCH allocation table, and are arranged in order of the signal strength from large to small.
  • the mobile terminal When the mobile terminal is in the standby state, the mobile terminal updates the BCCH allocation table every 5 seconds; when the mobile terminal is in the call state, the mobile terminal updates the BCCH allocation table every 0.5 seconds. Updating the BCCH allocation table requires reacquiring all the frequency points of the neighboring cells in the current location, and measuring the signal strength of each frequency point. In the prior art, the mobile terminal again uses the method of step one to select the six frequency points with the strongest signal strength among all the frequency points for sorting, but the normal data shows that in the actual network, the BCCH allocation table is updated. After that, the sorting results of the alternative frequency points are not much different:
  • the BCCH allocation table is updated by using the frequency point sorting method of the present invention, which is specifically: It is assumed that the frequency point sorting device acquires 15 frequency points when reacquiring the frequency point of the neighboring cell at the current location, and then measures each After the signal strength of the frequency points, the repeated 6 candidate frequency points are marked in the 15 frequency points.
  • the six candidate frequency points are again sorted using the bubble algorithm, and the update BCCH allocation table ends. Because in most cases, only two or three frequency points are changed in the BCCH allocation table, the frequency of the weakest frequency replacement is not too frequent each time the BCCH allocation table is updated. Compared with the prior art, the amount of calculation of the mobile terminal is greatly saved.
  • One embodiment of the frequency point sorting apparatus according to the embodiment of the present invention includes: 301.
  • the method is configured to obtain m frequency points with the strongest signal strength in the neighboring cell, and the candidate frequency point is greater than 1;
  • the second obtaining unit 302 is configured to obtain, after the preset duration, all the n frequency points in the current neighboring cell.
  • the third obtaining unit 303 is configured to obtain a frequency point with the weakest signal strength among the candidate frequency points, as the weakest frequency point;
  • the comparing unit 304 is configured to: after acquiring the weakest frequency point, select any one of the n frequency points except m frequency points, and compare the X frequency point with the weakest frequency point, if the X frequency point If the signal strength is greater than the signal strength of the weakest frequency point, the replacement unit is triggered, if the signal strength of the X frequency point is smaller than the signal of the weakest frequency point Intensity, the triggering unit is triggered;
  • a replacement unit 305 configured to replace the weakest frequency point with the X frequency point to update the candidate frequency point
  • the determining unit 306 is configured to determine whether all the frequency points except the m frequency points of the n frequency points have been selected, and if not, trigger the third acquiring unit, and if yes, trigger the output unit;
  • An output unit 307 configured to output a current candidate frequency point
  • the first sorting unit 308 is configured to sort the output candidate frequency points according to the magnitude of the signal strength.
  • the first obtaining unit in the frequency point device in the embodiment of the present invention may further include:
  • the fourth obtaining unit 309 is configured to acquire all k frequency points in the current neighboring cell, where k is greater than or equal to m;
  • the second sorting unit 310 is configured to compare the intensity of the signal strengths of the adjacent two frequency points from the first frequency point, until the k frequency points are traversed, and output the frequency point with the strongest signal strength; The method sequentially outputs m-1 frequency points with the strongest signal strength among the remaining frequency points.
  • the fourth obtaining unit 307 acquires all k frequency points in the current neighboring cell, k is greater than or equal to m; the second sorting unit 308 is the first one of the k frequency points. Starting at the frequency point, the signal intensity of the adjacent two frequency points is compared in turn until the k frequency points are traversed, and the frequency point with the strongest signal strength is output; using the above comparison method, the signal strength of the remaining frequency points is sequentially output. Strong m-1 frequency points, output m frequency points as candidate frequency points in the BCCH allocation table, and sorting is completed.
  • the mobile terminal After the preset duration, the mobile terminal needs to update the BCCH allocation table; according to the general standard, when the mobile terminal is in the standby state, the preset duration is 5 seconds; when the mobile terminal is in the call state, the preset duration is 0.5 seconds. .
  • the second obtaining unit 302 acquires all the n frequency points in the current neighboring cell, and measures the signal strength of each frequency point. Meanwhile, the third acquiring unit 303 acquires a frequency point with the weakest signal strength in the candidate frequency point.
  • the comparing unit 304 selects any X frequency points other than m frequency points among the n frequency points, and compares the X frequency point with the weakest frequency point, if the signal strength of the X frequency point is greater than The signal strength of the weakest frequency point triggers the replacement unit. If the signal strength of the X frequency point is less than the signal strength of the weakest frequency point, the judgment unit is triggered.
  • the replacement unit 305 replaces the weakest frequency point with the X-frequency point to update the candidate frequency point. If the signal strength of the X frequency point is less than the signal strength of the weakest frequency point, the determining unit 306 determines whether all the frequency points except the m frequency points of the n frequency points have been selected, and if not, triggers the third acquiring unit. 303 continues to process the remaining frequency points except m frequency points among the n frequency points, and if so, the trigger output unit 307 outputs the current candidate frequency point.
  • the first sorting unit 308 sorts the output pair of alternate frequency points by the magnitude of the signal strength.
  • the medium can be a read only memory, a magnetic disk or a compact disk or the like.

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Abstract

本发明实施例公开了一种频点排序方法以及相关设备,用于减少频点排序的运算量。本发明实施例方法包括:获取相邻小区中信号最强的m个频点作为备选频点,所述m大于1;经过预置时长后,获取当前相邻小区中所有的n个频点;获取备选频点中信号最弱的一个频点,作为最弱频点;选取n个频点中除m个频点外的任一X频点;将X频点与所述最弱频点相比,若X频点的信号大于最弱频点的信号,则使用所述X频点替换所述最弱频点,以对备选频点进行更新;判断是否已经选取了n个频点中除m个频点外的所有频点,若否,则重复上述步骤,若是,则输出备选频点;对备选频点按信号强度的大小进行排序。本发明实施例还提供了实现该方法的相关装置。

Description

一种频点排序方法以及相关设备 本申请要求于 2010年 10月 21 日提交中国国家知识产权局、 申请号为 201010518647.5、 发明名称为"一种频点排序方法以及相关设备"的中国专利申 请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域, 尤其涉及一种频点排序方法以及相关设备。
背景技术
无线通信系统被广泛在城乡的各个区域,以提供如话音、视频、分组数据、 消息传递、 广播等各种通信内容。 无线通信系统中可包含多个小区, 在通信术 语中, 小区可指代一个节点的最小覆盖区域和 /或服务该覆盖区域的该节点的 子系统。 当移动终端刚加电或刚失去覆盖该小区的信号时, 可以搜索当前移动 终端所处的小区, 该小区称为服务小区。
移动终端在使用中,会定期不断地测量服务小区和相邻小区的广播控制信 道( BCCH, Broadcast Common Control Channel )载波的信号强度, 以便当测 量到其他小区信号比当前小区信号强时, 能及时地切换过去。 此时, 移动终端 会通过服务小区的系统消息获取生成一个候选列表, 称为 BCCH分配表, 它 是一个小区的邻区 BCCH频点列表。 BCCH分配表里面有网络指示的可以用 于小区重选的频点, 这些频点作为移动终端的备选频点,移动台在周期性的测 量和同步这些频点, 接收 BCCH信道的系统消息, 用于小区重选。 BCCH分 配表里面备选频点的多少根据网络情况来配置, 有的网络多些, 有的少些。 BCCH分配表被贮存在移动终端中的永久寄存器或 SIM卡中, 用于在开机时 连接到系统的操作中。移动终端在待机状态和通话状态测量频点的间隔频率不 一样。 当移动终端处于通话状态中, 移动终端会频繁的搜索相邻小区的频点, 以便及时切换到信号最好的频点, 保持通话质量。
现有技术中, 在移动终端刚加电或者刚切换小区之后, 每张 SIM卡都会 用通用排序算法在自己的邻小区里选择信号最好的 6个频点, 5秒后, 按同样 的算法在自己邻小区里重新选择 6 个信号最好的频点进行排序。 但是很多时 候,当移动终端的位置没有发生移动时,前 5秒和后 5秒的 6个频点完全一样, 或者仅其中个别频点变化, 没有必要每次都重新排序。 况且现在的移动终端逐 渐出现可读取多张 SIM卡的功能,每张 SIM卡都需要建立一份 BCCH分配表, 同时也需要搜索多组备选频点,导致了移动终端的数据运算量急剧增加,如若 沿用现有技术的频点排序方法,将严重的影响移动终端的响应时间,导致移动 终端的性能指标下降。
常态的实险数据显示, 在实际网络中, 两次排序的结果相差不大: 静态情况下 (即移动终端未发生移动), 相邻两次排序结果中, 90%的情 况下, 只有 2个以下的频点发生变化;
动态情况下 (即移动终端发生移动), 相邻两次排序结果中, 80%的情况 下, 只有 3个以下的频点发生变化。
在实际网络中, 移动终端在进行相邻小区搜索时, 一般会搜索到 10到 20 个频点, 在三 SIM卡移动终端的情况下, 频点可达 60个。
基于上述情况,说明现有技术每隔 5秒就重新选择 6个信号最好的频点进 行排序是比较浪费移动终端的运算资源。
发明内容
本发明实施例提供了一种频点排序方法以及相关设备,用于减少频点排序 的运算量。
本发明实施例提供的频点排序方法, 包括: 1 )获取相邻小区中信号强度 最强的 m个频点, 作为备选频点, 所述 m大于 1; 2 )经过预置时长后, 获取 当前相邻小区中所有的 n个频点; 3 )获取备选频点中信号强度最弱的一个频 点, 作为最弱频点; 4 )选取 n个频点中除 m个频点外的任一 X频点; 5 )将 X频点与所述最弱频点相比, 若 X频点的信号强度大于最弱频点的信号强度, 则使用所述 X频点替换所述最弱频点, 以对备选频点进行更新; 6 )判断是否 已经选取了 n个频点中除 m个频点外的所有频点, 若否, 则重复上述步骤 3 ) 至步骤 5 ), 若是, 则输出备选频点; 7 )对备选频点按信号强度的大小进行排 序。
本发明实施例提供的频点排序装置, 包括: 第一获取单元, 用于获取相邻 小区中信号强度最强的 m个频点, 作为备选频点, 所述 m大于 1; 第二获取 单元, 用于经过预置时长后, 获取当前相邻小区中所有的 n个频点; 第三获取 单元, 用于获取备选频点中信号强度最弱的一个频点, 作为最弱频点; 比较单 元, 用于在获取最弱频点后, 选取 n个频点中除 m个频点外的任一 X频点, 将 X频点与所述最弱频点相比, 若 X频点的信号强度大于最弱频点的信号强 度, 则触发替换单元, 若 X频点的信号强度小于最弱频点的信号强度, 则触 发判断单元; 替换单元, 用于使用所述 X频点替换所述最弱频点, 以对备选 频点进行更新; 判断单元, 用于判断是否已经选取了 n个频点中除 m个频点 外的所有频点, 若否, 则触发第三获取单元, 若是, 则触发输出单元; 输出单 元, 用于输出当前的备选频点; 第一排序单元, 用于对输出的对备选频点按信 号强度的大小进行排序。
从以上技术方案可以看出, 本发明实施例具有以下优点: 频点排序装置每 隔预置时长就会获取备选频点中信号最弱的频点作为最弱频点,然后使用最弱 频点对比当前相邻小区的 n m个频点, 若该 n m个频点中的 X频点的信号 强度大于最弱频点, 则使用 X频点替换最弱频点, 且再次查找备选频点中的 最弱频点, 不断的循环, 直到将 n m个频点都对比完; 常态实险数据显示, 备选频点中频点信号的强弱变化很小, 所以在本发明的方案中, 最弱频点不会 被频繁地替换,因此,相比于现有技术无论当前频点的信号强度是否发生变化, 都一律重新在 n个频点中获取 m个信号最强的频点进行排序的方法, 本发明 频点排序的运算量要大大的小于现有技术。
附图说明
图 1是本发明实施例频点排序方法的一个流程示意图;
图 2是本发明实施例频点排序方法的另一个流程示意图;
图 3是本发明实施例频点排序装置的逻辑结构示意图。
具体实施方式
本发明实施例提供了一种频点排序方法以及相关设备,用于减少频点排序 的运算量。
请参阅图 1 , 本发明实施例中频点排序方法的一个实施例包括:
101、 获取 m个频点;
在移动终端刚加电或者刚切换小区时,频点排序装置获取相邻小区中信号 强度最强的 m个频点, 作为备选频点, 且 m大于 1。
在一般情况下, m的值为 6, 即获取相邻小区中信号强度最强的 6个频点 作为备选频点, 这 6个频点会存储在移动终端建立的 BCCH分配表里面, 使 得移动终端发生移动时, 可以及时从 BCCH分配表的备选频点中查找并切换 信号强度最好的相邻小区频点。
102、 获取 n个频点;
经过预置时长后, 频点排序装置需要获取当前相邻小区中所有的 n 个频 点,因为移动终端设备需要及时更新当前相邻小区中的频点以及频点的信号强 度, 保证移动终端进行通话时能切换到信号强度最好的频点进行通信。
103、 获取信号最弱的频点;
经过上述预置时长后, 频点排序装置查找该 m个备选频点中信号强度最 弱的频点, 作为最弱频点。
104、 对比 X频点与最弱频点;
在获取最弱频点后, 选取 n个频点中除 m个频点外的任一 X频点, 将 X 频点与该最弱频点相比, 若 X频点的信号强度大于最弱频点的信号强度, 则 触发步骤 105, 若 X频点的信号强度小于最弱频点的信号强度, 则触发步骤 106。
105、 替换最弱频点;
若 X频点的信号强度大于最弱频点的信号强度, 则使用该 X频点替换该 最弱频点, 以对备选频点进行更新。
106、 判断循环是否结束;
当 X频点的信号强度小于最弱频点的信号强度时, 或最弱频点被 X频点 替换之后, 判断是否已经选取完 n个频点中除 m个频点外的所有频点;
若是, 则输出当前的备选频点;
若否, 则触发步骤 103, 继续对比最弱频点的流程。
107、 对备选频点进行排序。
在输出当前备选频点后, 对当前 m个备选频点进行排序, 以便当移动终 端发生移动时, 能够及时切换到当前小区的信号强度最好的频点。
本发明实施例中,频点排序装置每隔预置时长就会获取备选频点中信号最 弱的频点作为最弱频点,通过对比最弱频点的方法然后使用最弱频点对比当前 相邻小区的 n m个频点, 若该 n m个频点中的 X频点的信号强度大于最弱 频点, 则使用 X频点替换最弱频点, 且再次查找备选频点中的最弱频点, 不 断的循环, 直到将 n m个频点都对比完; 常态实险数据显示, 备选频点中频 点信号的强弱变化很小,所以在本发明的方案中,最弱频点不会被频繁的替换, 因此,相比于现有技术无论当前频点的信号强度是否发生变化,都一律重新在 n个频点中获取 m个信号最强的频点进行排序的方法,本发明频点排序的运算 量要大大的小于现有技术。
本发明实施例以冒泡算法为例,对本发明的频点排序方法进行描述,请参 阅图 2, 本发明频点排序方法的另一实施例包括:
201、 获取 k个频点;
在移动终端刚加电或者刚切换小区时,频点排序装置获取当前相邻小区中 所有的 k个频点, k大于或等于 m。
一般情况下,频点排序装置获取到的当前相邻小区所有频点的个数不会发 生变化, 也就是 k和 n的值一般是相等的。
202、 对 m个频点进行排序;
频点排序装置使用冒泡算法在 k个频点中依次选出 m个信号强度最强的 频点, 作为备选频点; 具体为:
从首个频点开始,依次比较相邻两个频点信号强度的大小, 直到将 k个频 点都遍历完, 输出信号强度最强的频点, 该输出最强频点排在 BCCH分配表 中的第一位;
继续使用上述的比较方法,再次输出剩余频点中信号强度最强的频点, 输 出的频点依次排在 BCCH分配表的第二、第三位等, 直到排到第 m位后结束。
203、 获取 n个频点;
经过预置时长后, 频点排序装置需要获取当前相邻小区中所有的 n 个频 点,因为移动终端设备需要及时更新当前相邻小区中的频点以及频点的信号强 度, 保证移动终端进行通话时能切换到信号强度最好的频点进行通信。
在获取到 n个频点后,在该 n个频点中标记与备选频点重复的频点,在进 行遍历时不对该重复的频点进行比较。
204、 获取信号最弱的频点;
在经过预置时长后, 频点排序装置获取该 m个频点中信号强度最弱的频 点, 作为最弱频点。 具体的查找方法为:
从首个频点开始, 依次比较相邻两个频点信号强度的大小, 直到将 m个 频点都遍历完,输出信号强度最弱的频点, 并将该信号强度最弱的频点设定为 最弱频点。
根据通用的标准, 当移动终端处于待机状态时, 该预置时长为 5秒; 当移 动终端处于通话状态时, 该预置时长为 0.5秒。
205、 对比 X频点与最弱频点;
在获取最弱频点后,依次遍历 n个频点,选取 n个频点中没有被标记的频 点作为 X频点, 将 X频点与该最弱频点相比, 若 X频点的信号强度大于最弱 频点的信号强度, 则触发步骤 206, 若 X频点的信号强度小于最弱频点的信号 强度, 则触发步骤 207。
在 n个频点中, 频点排序装置会对已经选取过的频点进行标记。
206、 替换最弱频点;
若 X频点的信号强度大于最弱频点的信号强度, 则使用该 X频点替换该 最弱频点, 以对备选频点进行更新。
207、 判断循环是否结束;
当 X频点的信号强度小于最弱频点的信号强度时, 或最弱频点被 X频点 替换之后, 判断在 n个频点中是否所有的频点都已经被标记;
若是, 则输出当前的备选频点;
若否, 则触发步骤 204, 继续对比最弱频点的流程。
208、 对备选频点进行排序。
在输出当前备选频点后, 对该 m个备选频点进行排序, 以便当移动终端 发生移动时, 能够及时切换到当前小区的信号强度最好的频点, 具体为:
从首个频点开始, 依次比较相邻两个频点信号强度的大小, 直到将 m个 频点都遍历完, 输出信号强度最强的频点, 该输出最强频点排在 BCCH分配 表中的第一位;
继续使用上述的比较方法,再次输出剩余频点中信号强度最强的频点, 输 出的频点依次排在 BCCH分配表的第二、第三位等, 直到排到第 m位后结束。
在本发明实施例中,使用冒泡算法对本发明实施例中的频点排序方法进行 描述, 而现有技术使用冒泡算法在 n个频点中排出信号最强 m个点的大小顺 序时, 循环次数约为 mxn- ( 1+m ) xm/2次, 若采用本发明实施例的方案, 循 环次数约为 mxt+ ( n-m ) +mx ( m-1 ) /2次, 其中 t为最弱频点被替换的次数, t的最大值等于( n-m ), mxt为查找最弱频点的循环次数, ( n-m )为遍历 n-m 个频点的循环次数, mx ( m-1 ) /2为备选频点排序的循环次数。
常态数据显示, 每次 BCCH分配表更新后, 静态情况下 (即移动终端未 发生移动), 备选频点中, 90%的情况只有 2个以下的频点被替换发生变化; 动态情况下 (即移动终端发生移动), 备选频点中, 80%的情况只有 3个以下 的频点被替换发生变化; 而移动终端在进行相邻小区搜索时, 一般会搜索到 10到 20个频点, 在三 SIM卡移动终端的情况下, 频点可达 60个。 我们以搜 索到最少的 10个频点为例 (n=10 ), 选取 6个备选频点 (m=6 ), 假设经过预 置时长后有 3个备选频点被替换(t=3 ), 则使用现有技术的方法需要循环 39 次, 而本发明需要循环 37 次; 但是, 移动终端一般搜索到的频点远大于 10 个, 以 20个为例 (n=20 ), 使用现有技术的方法需要循环 99次, 而本发明则 循环 47次; 因此, 本发明实施例中的频点排序方法比较于现有技术, 明显的 减少了移动终端的运算量。
为了便于理解,下面以一具体应用场景对上述的实施例中描述的图像锐化 方法再进行详细描述, 具体为:
一、 首次频点排序:
在移动终端刚加电时,移动终端接收网络广播提供的当前位置相邻小区的 频点信息, 4叚设该频点信息中包含有相邻小区的 15个频点, 移动终端测量该 15频点中各个频点的信号强度, 并使用冒泡算法选取该 15个频点中信号强度 最强的 6个频点进行从大到小的排序, 具体为:
获取 15个频点的信号强度;
从首个频点开始, 依次比较相邻两个频点信号强度的大小, 直到将 15个 频点都遍历完, 输出信号强度最强的频点;
使用上述比较方法, 依次输出剩余频点中信号强度最强的 5个频点。 输出的 6个频点依次存储在 BCCH分配表的备选频点对应的位置上, 按 信号强度从大到小的顺序排列。
二、 更新 BCCH分配表:
当移动终端处于待机状态时, 移动终端每隔 5秒更新 BCCH分配表; 当移动终端处于通话状态时, 移动终端每隔 0.5秒更新 BCCH分配表。 更新 BCCH分配表需要重新获取当前位置相邻小区所有的频点, 并测量 每个频点的信号强度。 在现有技术中, 移动终端会再次使用步骤一的方法,在所有的频点中选取 信号强度最强的 6个频点进行排序, 但常态的数据显示, 在实际网络中, 更新 BCCH分配表后, 备选频点的排序结果相差不大:
静态情况下 (即移动终端未发生移动), 相邻两次排序结果中, 90%的情 况下, 只有 2个以下的频点发生变化;
动态情况下 (即移动终端发生移动), 相邻两次排序结果中, 80%的情况 下, 只有 3个以下的频点发生变化。
根据上述情况, 使用本发明频点排序的方法更新 BCCH分配表, 具体为: 假设频点排序装置在重新获取当前位置相邻小区的频点时, 还是获取到 15个频点, 则在测量每个频点的信号强度之后, 在该 15个频点中标记重复的 6个备选频点。
获取备选频点中的最弱频点, 将最弱频点与没有标记的 9 个频点逐个比 较, 若该最弱频点小于该 9频点中的频点, 则替换最弱频点, 并重新获取备选 频点中的最弱频点与 9个频点中剩下的频点相比较,直到将该 9个频点都比较 完, 输出当前的备选频点。
使用冒泡算法对 6个备选频点再次进行排序, 更新 BCCH分配表结束。 因为在大部分情况下, BCCH分配表中的排序结果只有两个或三个的频点 发生变化, 所以每次更新 BCCH分配表时, 最弱频点替换的次数不会太频繁, 因此, 相比于现有技术, 大大的节省了移动终端的运算量。
下面对用于执行上述频点排序方法的本发明频点排序装置的实施例进行 说明,其逻辑结构请参考图 3,本发明实施例频点排序装置的一个实施例包括: 第一获取单元 301 , 用于获取相邻小区中信号强度最强的 m个频点,作为 备选频点, m大于 1;
第二获取单元 302, 用于经过预置时长后, 获取当前相邻小区中所有的 n 个频点;
第三获取单元 303, 用于获取备选频点中信号强度最弱的一个频点, 作为 最弱频点;
比较单元 304,用于在获取最弱频点后,选取 n个频点中除 m个频点外的 任一 X频点, 将 X频点与该最弱频点相比, 若 X频点的信号强度大于最弱频 点的信号强度, 则触发替换单元, 若 X频点的信号强度小于最弱频点的信号 强度, 则触发判断单元;
替换单元 305 , 用于使用该 X频点替换该最弱频点, 以对备选频点进行更 新;
判断单元 306,用于判断是否已经选取了 n个频点中除 m个频点外的所有 频点, 若否, 则触发第三获取单元, 若是, 则触发输出单元;
输出单元 307, 用于输出当前的备选频点;
第一排序单元 308,用于对输出的对备选频点按信号强度的大小进行排序。 本发明实施例中的频点装置中的第一获取单元可以进一步包括:
第四获取单元 309, 用于获取当前相邻小区中所有的 k个频点, k大于或 等于 m;
第二排序单元 310, 用于从首个频点开始, 依次比较相邻两个频点信号强 度的大小, 直到将 k个频点都遍历完, 输出信号强度最强的频点; 使用上述比 较方法, 依次输出剩余频点中信号强度最强的 m-1个频点。
本发明实施例频点排序装置的各个单元具体的交互过程如下:
在移动终端刚加电或者刚切换小区时,第四获取单元 307获取当前相邻小 区中所有的 k个频点, k大于或等于 m; 第二排序单元 308从 k个频点中的首 个频点开始,依次比较相邻两个频点信号强度的大小, 直到将 k个频点都遍历 完, 输出信号强度最强的频点; 使用上述比较方法, 依次输出剩余频点中信号 强度最强的 m-1个频点, 输出的 m个频点作为 BCCH分配表中的备选频点, 并完成排序。
经过预置时长后, 移动终端需要更新 BCCH分配表; 根据通用的标准, 当移动终端处于待机状态时,该预置时长为 5秒;当移动终端处于通话状态时, 该预置时长为 0.5秒。第二获取单元 302获取当前相邻小区中所有的 n个频点, 并测量每个频点的信号强度; 同时, 第三获取单元 303获取备选频点中信号强 度最弱的一个频点, 作为最弱频点; 然后比较单元 304选取 n个频点中除 m 个频点外的任一 X频点, 将 X频点与该最弱频点相比, 若 X频点的信号强度 大于最弱频点的信号强度, 则触发替换单元, 若 X频点的信号强度小于最弱 频点的信号强度, 则触发判断单元。
若 X频点的信号强度大于最弱频点的信号强度,则替换单元 305使用该 X 频点替换该最弱频点, 以对备选频点进行更新。 若 X频点的信号强度小于最弱频点的信号强度, 则判断单元 306判断是 否已经选取了 n个频点中除 m个频点外的所有频点, 若否, 则触发第三获取 单元 303继续对 n个频点中除 m个频点外的剩余频点进行处理, 若是, 则触 发输出单元 307于输出当前的备选频点。
在输出当前的备选频点后,第一排序单元 308对输出的对备选频点按信号 强度的大小进行排序。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件完成,所述的程序可以存储于一种计算机可 读存储介质中, 上述提到的存储介质可以是只读存储器, 磁盘或光盘等。
以上对本发明所提供的一种频点排序方法以及相关设备进行了详细介绍, 对于本领域的一般技术人员,依据本发明实施例的思想,在具体实施方式及应 用范围上均会有改变之处, 综上所述, 本说明书内容不应理解为对本发明的限 制。

Claims

权 利 要 求
1、 一种频点排序方法, 其特征在于, 包括:
1 )获取相邻小区中信号强度最强的 m个频点, 作为备选频点, 所述 m大 于 1 ;
2 )经过预置时长后, 获取当前相邻小区中所有的 n个频点;
3 )获取备选频点中信号强度最弱的一个频点, 作为最弱频点;
4 )选取 n个频点中除 m个频点外的任一 X频点;
5 )将 X频点与所述最弱频点相比, 若 X频点的信号强度大于最弱频点的 信号强度, 则使用所述 X频点替换所述最弱频点, 以对备选频点进行更新;
6 )判断是否已经选取了 n个频点中除 m个频点外的所有频点, 若否, 则 重复上述步骤 3 )至步骤 5 ), 若是, 则输出备选频点;
7 )对备选频点按信号强度的大小进行排序。
2、 根据权利要求 1所述的方法, 其特征在于, 所述获取备选频点中信号 强度最弱的一个频点, 作为最弱频点包括:
从首个频点开始, 依次比较相邻两个频点信号强度的大小, 直到将 m个 频点都遍历完, 输出信号强度最弱的频点。
3、 根据权利要求 1所述的方法, 其特征在于, 所述对备选频点按信号强 度的大小进行排序包括:
从首个频点开始, 依次比较相邻两个频点信号强度的大小, 直到将 m个 频点都遍历完, 输出信号强度最强的频点;
使用上述比较方法, 依次输出剩余频点中信号强度最强的 m-1频点。
4、 根据权利要求 1所述的方法, 其特征在于, 所述获取相邻小区中信号 强度最强的 m个频点包括:
获取当前相邻小区中所有的 k个频点, 所述 k大于或等于 m;
从首个频点开始,依次比较相邻两个频点信号强度的大小, 直到将 k个频 点都遍历完, 输出信号强度最强的频点;
使用上述比较方法, 依次输出剩余频点中信号强度最强的 m-1个频点。
5、 根据权利要求 1所述的方法, 其特征在于, 所述选取 n个频点中除 m 个频点外的任一 X频点之后, 包括: 对已经选取过的频点进行标记, 使得再次选取 X频点时, 频点排序装置 可以根据所述标记避免重复选取已经对比过的频点。
6、 根据权利要求 1至 4任意一项所述的方法, 其特征在于, 所述预置时 长包括:
当移动终端处于待机状态时, 所述预置时长为 5秒;
当移动终端处于通话状态时, 所述预置时长为 0.5秒。
7、 一种频点排序装置, 其特征在于, 包括:
第一获取单元, 用于获取相邻小区中信号强度最强的 m个频点, 作为备 选频点, 所述 m大于 1 ;
第二获取单元, 用于经过预置时长后, 获取当前相邻小区中所有的 n个频 点;
第三获取单元, 用于获取备选频点中信号强度最弱的一个频点,作为最弱 频点;
比较单元, 用于在获取最弱频点后, 选取 n个频点中除 m个频点外的任 一 X频点, 将 X频点与所述最弱频点相比, 若 X频点的信号强度大于最弱频 点的信号强度, 则触发替换单元, 若 X频点的信号强度小于最弱频点的信号 强度, 则触发判断单元;
替换单元, 用于使用所述 X频点替换所述最弱频点, 以对备选频点进行 更新;
判断单元, 用于判断是否已经选取了 n个频点中除 m个频点外的所有频 点, 若否, 则触发第三获取单元, 若是, 则触发输出单元;
输出单元, 用于输出当前的备选频点;
第一排序单元, 用于对输出的对备选频点按信号强度的大小进行排序。
8、 根据权利要求 7所述的装置, 其特征在于, 所述第一获取单元包括: 第四获取单元, 用于获取当前相邻小区中所有的 k个频点, 所述 k大于或 等于 m;
第二排序单元, 用于从首个频点开始,依次比较相邻两个频点信号强度的 大小, 直到将 k个频点都遍历完, 输出信号强度最强的频点; 使用上述比较方 法, 依次输出剩余频点中信号强度最强的 m-1个频点。
9、 根据权利要求 7所述的装置, 其特征在于, 所述第一排序单元包括: 对比模块,用于从首个频点开始,依次比较相邻两个频点信号强度的大小, 直到将 m个频点都遍历完;
输出模块, 用于依次输出上述比较后得到的信号强度最强的频点。
10、 根据权利要求 7所述的装置, 其特征在于, 所述装置还包括: 标记单元, 用于对比较单元已经选取过的频点进行标记, 使得再次选取 X 频点时, 频点排序装置可以根据所述标记避免重复选取已经对比过的频点。
PCT/CN2011/075082 2010-10-21 2011-06-01 一种频点排序方法以及相关设备 WO2012051856A1 (zh)

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