WO2012024924A1 - Td-scdma网络中的小区重选方法及终端设备 - Google Patents

Td-scdma网络中的小区重选方法及终端设备 Download PDF

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Publication number
WO2012024924A1
WO2012024924A1 PCT/CN2011/072343 CN2011072343W WO2012024924A1 WO 2012024924 A1 WO2012024924 A1 WO 2012024924A1 CN 2011072343 W CN2011072343 W CN 2011072343W WO 2012024924 A1 WO2012024924 A1 WO 2012024924A1
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Prior art keywords
cell
inter
frequency
terminal device
frequency neighboring
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English (en)
French (fr)
Inventor
林峰
曾文琪
邱宁
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports

Definitions

  • the present invention relates to the field of wireless communications, and in particular to a cell reselection method and a terminal device in a TD-SCDMA (Time Division Synchronous Code Division Multiple Access) network.
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • TD-SCDMA TD-SCDMA
  • the terminal device when the terminal device is in an idle state without voice or data services, the terminal device continuously monitors the received signal strength of the currently camped TD cell and the adjacent inter-frequency cell. And updating the cell in which it resides according to the change of the immediate network environment to maintain the TD standby state. This process is called a TD cell reselection process.
  • the cell reselection strategy adopted by the traditional TD terminal device is: In the idle state, the terminal device monitors the signal quality of the currently camped cell in real time, which is measured by measuring the first two code channels of the current cell slot 0, that is, PCCPCH (Primary The Common Control Physical Channel (RSCP) is implemented by RSCP (Received Signal Code Power). At the same time, the terminal device obtains the frequency of the adjacent inter-frequency cell (hereinafter referred to as the inter-frequency neighboring cell) designated by the currently camped cell network side from the system information acquired on the BCH (Broadcast Channel) of the currently camping cell.
  • PCCPCH Primary The Common Control Physical Channel
  • RSCP Receiveived Signal Code Power
  • the terminal device measures the RSCP value on the PCCPCH in the inter-frequency neighboring cell, and sorts the inter-frequency neighboring cells according to the RSCP measurement value to form a candidate neighboring cell set for cell reselection.
  • the cell reselection process is triggered, and the terminal device selects one of the candidate inter-frequency neighboring cell sets according to the RSCP measurement value, and reads BCH system information on it.
  • the terminal device switches the frequency point and camps on the new d, On the district, complete cell re-election. After that, the process is repeated to maintain the TD standby state of the terminal device; if the BCH information of all the candidate neighboring cells fails to be read, and the original resident cell signal fails to reside as the environment changes, the terminal device is Forced to lose coverage, can only re-resident by sweeping and cell blind search.
  • the traditional cell reselection strategy has an inherent defect: the terminal device completely relies on the current camped cell network side system message to determine the set of candidate inter-frequency neighboring cells in the environment, and performs corresponding inter-frequency neighbor cell measurement, that is, After reselecting to a new cell, the terminal device discards all neighboring cell relationships and measured value information of the previously camped cell.
  • such strategies may lead to a decrease in the success rate of cell reselection in some specific environmental scenarios.
  • An example that actually appears in a field is: When the terminal equipment moves from a well-covered open area to a narrow strip with a linear distribution of cells, the signal of the originally open area resident cell (set to cell A) drops rapidly.
  • the cell reselection process is triggered. Only one of the candidate inter-frequency neighboring cells specified by the original camping cell A is relatively strong (set to cell B). According to the expectation of the network side, the candidate neighbor cell B is located. In the narrow zone where the terminal equipment is about to enter; due to unreasonable network planning or shadow effect of the wireless signal, the terminal device cannot correctly read the system information on the cell B at the current location, and other candidate neighbors designated by the cell A network side The zone also failed to read because the signal was too weak, eventually causing the terminal device to lose coverage and being forced to initiate a sweep.
  • the terminal equipment had a re-election process, and another cell (set to cell C) was successfully re-selected to cell A; and until the terminal device entered the narrow zone
  • the signal of cell C can maintain a good level, enough for the terminal device to successfully reside, and cell A exists in the inter-frequency neighboring zone specified by the network side; however, although the inter-frequency neighboring zone specified by the cell C network side is included
  • the cell A so that the terminal device can be correctly reselected to the cell A, but after the terminal device reselects to the cell A, all neighboring cell lists on the original cell C have been released, and the cell A side specifies the inter-frequency neighboring cell.
  • Cell C is not included; therefore, when the terminal device reselects from cell A to cell B because it fails to read the BCH error, it cannot select the station. Leave the cell c that is actually acceptable for the signal strength, and only lose the coverage to initiate the sweep blind search.
  • the above example analysis shows that simply relying on the inter-frequency neighbor list issued by the network side to configure the measurement task of the terminal device can not accurately reflect the signal strength of the neighboring area in the field. Further, the strategy of re-selecting the historical measurement information of the original serving cell by reselecting the traditional cell reselection strategy to a new serving cell is also open to question. Summary of the invention
  • the present invention provides a cell reselection method and a terminal device in a TD-SCDMA network, which are used to solve the historical value information of the neighboring area measurement of the terminal device in the cell reselection in the TD-SCDMA network, and reduce the terminal device.
  • a cell reselection method in a TD-SCDMA network comprising:
  • Step A When the cell reselection process is triggered, the terminal device obtains a RSCP measurement value according to the received signal code power of the main common control physical channel PCCPCH from the inter-frequency neighbor list specified by the currently camped cell network side maintained by the terminal device. In a small order, sequentially try to read the broadcast channel BCH information on the corresponding inter-frequency neighboring cell and reselect the inter-frequency neighboring cell to which the BCH information can be successfully read.
  • Step B If all current camping cell network side specifications are read If the BCH information of the inter-frequency neighboring cell fails, the terminal device attempts to read the corresponding sequence of the RSCP measurement values of the PCCPCH in descending order according to the sequence of the inter-frequency neighboring cells inherited from the previous camped cell. The BCH information on the inter-frequency neighboring cell is reselected to the inter-frequency neighboring cell where the BCH information can be successfully read.
  • the inter-frequency neighboring cell list specified by the currently camped cell network side and the inter-frequency neighboring cell list continued from the previous camping cell constitute a neighboring cell history measurement information table.
  • the number of inter-frequency neighbors recorded in the neighboring area history measurement information table depends on the maximum measurement capability of the terminal device.
  • the update of the neighboring area history measurement information table includes:
  • Step m After the terminal device is reselected to a new cell, it is determined that the two camps remain before and after the reselection. Whether the inter-frequency neighboring cell list specified by the cell network side includes a repeated inter-frequency neighboring cell, if yes, deleting the repeated inter-frequency neighboring cell from the neighboring area historical measurement information table, and performing step n, otherwise, directly performing step n;
  • Step n According to the principle of first-in-first-out, the terminal device includes the inter-frequency neighboring area specified by the residing cell network side into the front end of the neighboring area historical measurement information table, and the corresponding number of historical inter-frequency neighbors at the end of the table The area is discarded, and other inter-frequency neighbors in the table are sequentially shifted backward.
  • the maintenance of the neighboring area history measurement information table includes: after each measurement period ends, the terminal device first updates the RSCP measurement value of the PCCPCH corresponding to the inter-frequency neighboring cell in the neighboring area history measurement information table according to the measurement result, and then according to the RSCP of the PCCPCH.
  • the measured value size performs a descending ordering on the list of the inter-frequency neighboring cells specified by the currently camped cell network side and the list of the inter-frequency neighboring cells inherited from the previous camping cell.
  • the method further includes: if all the BCH information of the inter-frequency neighboring cell inherited from the previous camping cell fails, the terminal device continues to stay in the current camping cell, and returns to step A until it finds a suitable one.
  • the target cell reselection succeeds, or the sweep and cell blind search process is initiated because the current camped cell signal drops the coverage.
  • a terminal device comprising:
  • the inter-frequency neighboring cell information maintenance module is configured to maintain a list of the inter-frequency neighboring cells specified by the currently camped cell network side of the terminal device and the inter-frequency neighboring cell list inherited from the previous camping cell;
  • the first reselection module is configured to: according to the RSCP measurement value of the PCCPCH, from the list of the inter-frequency neighboring cells specified by the current camped cell network side maintained by the inter-frequency neighboring cell information maintenance module when the cell reselection process is triggered In a small order, sequentially attempt to read the BCH information on the corresponding inter-frequency neighboring area and reselect the inter-frequency neighboring area in which the BCH information can be successfully read;
  • a second reselection module configured to: when the BCH information of the inter-frequency neighboring cell specified by the current camping cell network side fails, the inter-frequency inherited from the previous camping cell maintained by the inter-frequency neighboring cell information maintenance module In the neighbor list, according to the RSCP measurement value of the PCCPCH, from the order of the big to the d, An attempt is made to read the BCH information on the corresponding inter-frequency neighbor and reselect the inter-frequency neighbors to which the BCH information can be successfully read.
  • the inter-frequency neighboring cell list specified by the current camping cell network side and the inter-frequency neighboring cell list inherited from the previous camping cell form a neighboring cell historical measurement information table.
  • the number of inter-frequency neighbors recorded in the neighboring area historical measurement information table depends on the maximum measurement capability of the terminal device.
  • the inter-frequency neighboring cell information maintenance module is specifically configured to: after the terminal device reselects to a new cell, the neighboring cell history measurement information table is repeated in the inter-frequency neighboring cell specified by the cell network side before and after reselection Delete, and then, according to the first-in-first-out principle, the inter-frequency neighboring area specified by the residing cell network side is included in the front end of the neighboring area historical measurement information table, and the corresponding number of historical inter-frequency neighboring areas at the end of the table are discarded.
  • the other inter-frequency neighbors in the table are sequentially shifted backward.
  • the inter-frequency neighboring area information maintenance module is specifically configured to: after each measurement period ends, first update the RSCP measurement value of the PCCPCH corresponding to the inter-frequency neighboring area in the neighboring area historical measurement information table according to the measurement result, and then follow the RSCP of the PCCPCH.
  • the measured value size performs a descending ordering on the list of the inter-frequency neighboring cells specified by the currently camped cell network side and the list of the inter-frequency neighboring cells inherited from the previous camping cell.
  • the present invention has the following beneficial effects:
  • the technical solution of the present invention gives the terminal device a self-active measurement capability, and utilizes the historical value information of the measurement of the inter-frequency neighboring area of the terminal device, thereby weakening the dependence of the terminal device on the information of the designated inter-frequency neighboring area on the network side, and improving the terminal device.
  • the cell reselection performance in a complex scenario effectively improves the success rate of cell reselection.
  • FIG. 1 is a schematic diagram of a neighboring area history measurement information table according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a method for updating a neighboring area history measurement information table according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a process of updating a neighboring area history measurement information table according to an embodiment of the present invention
  • FIG. 4 is a schematic flow chart of a cell reselection method in a TD-SCDMA network according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. detailed description
  • the main technical idea of the present invention is: To improve the robustness of the terminal device against complex environmental changes, the terminal device needs to spontaneously understand the environment in which it is located, and maintain and update the neighboring area as long as possible within the scope of its capability. Historical measurement information. In this way, when the inter-frequency neighboring cell listed in the measurement list sent by the network side cannot be switched, the terminal device may try to select a target cell with a better signal from the retained neighboring cell history information, thereby reducing the probability of lost coverage.
  • the terminal device when the cell reselection process is triggered, sequentially, according to the RSCP measurement value of the PCCPCH, from the list of the inter-frequency neighboring cells specified by the currently camped cell network side maintained by the terminal device. Try to read the broadcast channel BCH information on the corresponding inter-frequency neighboring cell and reselect the inter-frequency neighboring cell to which the BCH information can be successfully read.
  • the BCH information on the corresponding inter-frequency neighboring area is sequentially read and reselected to the inter-frequency neighboring area where the BCH information can be successfully read.
  • the overall solution of the embodiment of the present invention can be divided into three main parts: the first is the autonomous measurement of the inter-frequency neighboring cell in the current environment by the terminal device; the second is the maintenance and update of the historical measurement value of the neighboring cell; The third is the process of determining and reselecting the target cell for cell reselection.
  • the requirements for the autonomous measurement of the terminal device in the embodiment of the present invention are as follows: The maximum measurement capability of the physical layer of the terminal device is utilized, and the RSCP measurement value of the PCCPCH of the inter-frequency neighboring cell of the current camping cell is obtained as much as possible and as fast as possible.
  • the number of inter-frequency cell measurements that the terminal device can complete in one measurement period depends on the maximum measurement capability of the terminal device, and the maximum inter-frequency cell measurement number is a constant, at this maximum inter-frequency.
  • the terminal device needs to preferentially ensure the RSCP measurement of the PCCPCH of the inter-frequency neighboring cell specified by the currently camped cell network side. On this basis, if the terminal device also has additional measurement capabilities, the terminal device needs to perform RSCP measurement on the PCCPCH of other inter-frequency neighboring cells except the inter-frequency neighboring cell specified by the network side.
  • the RSCP measurement values of the PCCPCHs of all the inter-frequency neighboring cells are recorded in a neighboring area historical measurement information table maintained by the terminal device as shown in FIG. 1, and the table has a total of L elements, corresponding terminals.
  • the L inter-frequency neighboring cells of the L possible possible neighboring cells of the device and their RSCP measurements of the PCCPCH It is further divided into two parts: the first part (N elements) is the RSCP measurement value of the inter-frequency neighboring area and its PCCPCH that are required by the terminal equipment, which is currently reserved by the terminal equipment, and the neighboring area information.
  • FIG. 2 which is a schematic flow chart of a method for updating a neighboring area history measurement information table according to an embodiment of the present invention, the specific steps are as follows:
  • Step 20 The terminal device reselects to a new cell
  • Step 21 The terminal device determines whether the inter-frequency neighboring cell list specified by the network of the two camping cells before the reselection includes a repeated inter-frequency neighboring cell, and if yes, go to step 22; otherwise, directly execute step 23;
  • Step 22 the terminal device deletes the repeated inter-frequency neighboring cell from the neighboring area history measurement information table, and performs step 23;
  • Step 23 According to the principle of first-in-first-out, the terminal equipment is included in the front end of the neighboring area historical measurement information table, and the history of the corresponding number of the neighboring area historical measurement information table is included in the front end of the neighboring area.
  • the inter-frequency neighboring cell is discarded, and other inter-frequency neighboring cells in the neighboring area historical measurement information table are sequentially shifted backward.
  • FIG. 3 is a schematic diagram of an update process of a neighboring area history measurement information table according to an embodiment of the present invention, where a neighboring area history measurement information table of a terminal device has a total of L elements, and when the terminal device is powered on for the first time, the cell A is camped on.
  • the first N A elements in the neighboring area historical measurement information table are from the list of inter-frequency neighbors that are sent by the first camping cell, and the rear LN A elements are set to be empty.
  • the terminal equipment When the terminal equipment is reselected to the cell B by the cell A through the reselection process, firstly, the inter-frequency neighboring cell list specified by the B-network side of the current camping cell is set (there are a total of N B inter-frequency neighboring cells), and the existing one is eliminated.
  • the repeated inter-frequency neighboring area in the neighboring area historical measurement information table, and the remaining inter-frequency neighboring areas are close to the front end of the neighboring area historical measurement information table, and the element position vacated at the back end of the neighboring area historical measurement information table is set to be empty;
  • the first-out principle the cells in the neighboring area historical measurement information table are sequentially moved backward by N B bits, the positions of the first N B elements in the table are vacated, and the N B cells at the tail end of the table are discarded;
  • the inter-frequency neighboring cell delivered by the B-network side of the current camping cell fills the first N B locations in the neighboring area historical measurement information table.
  • the method for maintaining the neighboring area history measurement information table in the embodiment of the present invention is as follows: After each measurement period ends, the terminal device first updates the RSCP measurement value of the PCCPCH corresponding to the inter-frequency neighboring area in the neighboring area history measurement information table according to the measurement result, and then According to the RSCP measurement value of the PCCPCH, the inter-frequency neighbor list specified by the current camp cell side and the inter-frequency neighbor list inherited from the previous camp cell are respectively sorted in descending order.
  • the terminal device after the terminal device camps on a cell through the blind search or reselection process, if the terminal device is in an idle state without voice or data service, the terminal device periodically initiates the current camp cell measurement and the neighboring cell. measuring.
  • the current camped cell measurement is to monitor the received signal quality change of the current camped cell.
  • the terminal device triggers the cell reselection operation.
  • the neighboring area measurement is further divided into the same frequency neighboring area measurement and the inter-frequency neighboring area measurement.
  • FIG. 4 is a schematic flowchart of a cell reselection method in a TD-SCDMA network according to an embodiment of the present invention, which mainly includes the following steps:
  • Step 40 After the terminal equipment resides in a cell, periodically measure the RSCP value of the PCCPCH of the currently camped cell.
  • Step 41 According to the measurement result of step 40, the terminal device determines whether the RSCP measurement value of the PCCPCH of the current camping cell is lower than a preset threshold. If yes, trigger cell reselection, go to step 42, otherwise, maintain the current camping cell. Resident, return to step 40.
  • Step 42 The terminal device extracts a first element from a list of inter-frequency neighboring cells specified by the currently camped cell network side in the autonomously maintained neighboring cell history measurement information table, where the corresponding element is a historical RSCP measurement of the PCCPCH in the list.
  • the inter-frequency neighboring cell with the highest value the terminal device sets the inter-frequency neighboring cell as the reselected target cell.
  • Step 43 The terminal device determines whether the BCH information of the currently selected reselection target cell can be correctly read. If yes, it indicates that the target cell signal strength can allow the terminal device to reside thereon, and step 50 is performed. Otherwise, the target is specified. If the cell signal strength has changed and is not suitable for camping, go to step 44.
  • Step 44 The terminal device determines whether all the inter-frequency neighboring cells in the inter-frequency neighbor list specified by the currently camped cell network side are all set as the over-reselected target cell, and if yes, go to step 46; otherwise, go to step 45.
  • Step 45 The terminal device extracts the next element from the list of the inter-frequency neighboring cells specified by the currently camped cell network side in the neighboring cell history measurement information table, and specifies the corresponding inter-frequency neighboring cell as the reselected target cell, and returns to the step. 43.
  • Step 46 The terminal device extracts, from the list of the inter-frequency neighboring cells inherited from the previous camping cell in the autonomously maintained neighboring cell history measurement information table, the first element, which corresponds to the historical RSCP measurement value of the PCCPCH in the list. The highest inter-frequency neighboring cell, the terminal device sets the inter-frequency neighboring cell as the reselected target cell.
  • Step 47 The terminal device determines whether the BCH information of the currently selected reselection target cell can be correctly read. If yes, it indicates that the target cell signal strength can allow the terminal device to reside thereon, and step 50 is performed. Otherwise, the target is specified. If the cell signal strength has changed and is not suitable for camping, go to step 48.
  • Step 48 The terminal device determines whether all the inter-frequency neighboring cells in the inter-frequency neighboring cell list that has been inherited from the previous camping cell are set as the over-reselected target cell, and if yes, step 51 is performed; otherwise, step 49 is performed.
  • Step 49 The terminal device extracts the next element from the list of the inter-frequency neighboring cells inherited from the previous camped cell in the neighboring area historical measurement information table, and specifies the corresponding inter-frequency neighboring cell as the reselected target cell, and returns to step 47. .
  • Step 50 The terminal device reselects to the corresponding target cell.
  • Step 51 The terminal device determines whether it can continue to stay in the current camping cell, and if yes, returns to step 40, otherwise, step 52 is performed.
  • Step 52 The terminal device initiates a frequency sweep and a cell blind search process because the current camped cell signal drops the coverage.
  • the embodiment of the present invention further provides a terminal device.
  • FIG. 5 the figure is a schematic structural diagram of a terminal device according to an embodiment of the present invention, which mainly includes an inter-frequency neighboring cell information maintenance module and a first reselection module. And a second reselection module, wherein
  • the inter-frequency neighboring cell information maintenance module is configured to maintain a list of the inter-frequency neighboring cells specified by the currently camped cell network side of the terminal device and the inter-frequency neighboring cell list inherited from the previous camping cell;
  • the first reselection module is configured to: according to the RSCP measurement value of the PCCPCH, from the list of the inter-frequency neighboring cells specified by the current camped cell network side maintained by the inter-frequency neighboring cell information maintenance module when the cell reselection process is triggered In a small order, sequentially attempt to read the BCH information on the corresponding inter-frequency neighboring area and reselect the inter-frequency neighboring area in which the BCH information can be successfully read;
  • a second reselection module configured to: when the BCH information of the inter-frequency neighboring cell specified by the current camping cell network side fails, the inter-frequency inherited from the previous camping cell maintained by the inter-frequency neighboring cell information maintenance module In the neighboring cell list, according to the RSCP measurement value of the PCCPCH, the BCH information on the corresponding inter-frequency neighboring cell is sequentially read and reselected to the inter-frequency neighboring cell in which the BCH information can be successfully read.
  • the inter-frequency neighboring cell list specified by the current camping cell network side and the inter-frequency neighboring cell list inherited from the previous camping cell form a neighboring cell historical measurement information table, and the neighboring cell
  • the number of inter-frequency neighbors recorded in the historical measurement information table depends on the maximum measurement capability of the terminal device.
  • the inter-frequency neighboring cell information maintenance module deletes the repeated cell in the inter-frequency zone neighboring cell specified by the cell network side before and after reselection from the neighboring cell history measurement information table. Then, according to the principle of first-in-first-out, the inter-frequency neighbors designated by the cell network side after reselection will be re-selected.
  • the area is included in the front end of the neighboring area historical measurement information table, and the corresponding number of historical inter-frequency neighboring areas at the end of the table are discarded, and the other inter-frequency neighboring areas in the table are sequentially shifted backward; the inter-frequency neighboring area information maintenance module is After the end of each measurement period, the RSCP measurement value of the PCCPCH corresponding to the inter-frequency neighboring cell in the neighboring area history measurement information table is updated according to the measurement result, and then the current camped cell network side is respectively designated according to the RSCP measurement value of the PCCPCH.
  • the inter-frequency neighbor list and the inter-frequency neighbor list inherited from the previous camping cell are sorted in descending order.
  • the embodiment of the present invention provides the self-active measurement capability of the terminal device, so that the autonomous measurement of the inter-frequency neighboring cell in the current environment does not completely depend on the inter-frequency neighboring cell list sent by the network side, but is also limited.
  • the maximum measurement capability of the terminal device in the maintenance of the historical measurement value of the neighboring cell, on the basis of preferentially satisfying the list of the inter-frequency neighboring cells specified by the network side, the requirements for the autonomous measurement of the terminal device can be satisfied as much as possible.
  • the conflict resolution mechanism includes first-in first-out and immediate sorting of the list of measured values, so that the historical measured value information of the neighboring area of the terminal device is fully utilized, which reduces the dependence of the terminal device on the specified information on the network side, and improves the terminal device in the
  • the cell reselection performance in a complex scenario effectively improves the success rate of cell reselection.

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Description

TD-SCDMA网络中的小区重选方法及终端设备 技术领域
本发明涉及无线通信领域， 具体涉及一种 TD-SCDMA ( Time Division Synchronous Code Division Multiple Access, 时分同步码分多址接入 ) 网络 中的小区重选方法及终端设备。 背景技术
在典型的 TD-SCDMA (以下简称 TD ) 网络环境中， 当终端设备处于 没有语音或数据业务的空闲状态时，终端设备会持续监控当前驻留的 TD小 区和临近异频小区的接收信号强度， 并根据即时的网络环境变化更新其驻 留的小区， 以维持 TD待机状态， 这个过程被称作 TD小区重选过程。
传统的 TD终端设备釆用的小区重选策略是： 在空闲状态，终端设备实 时监控当前驻留小区的信号质量， 这通过测量当前小区时隙 0上前两条码 道、 也即是 PCCPCH ( Primary Common Control Physical Channel, 主公共控 制物理信道） 的 RSCP ( Received Signal Code Power, 接收信号码功率）来 实现。与此同时，终端设备也会从当前驻留小区的 BCH( Broadcast Channel, 广播信道）上获取的系统信息获得当前驻留小区网侧指定的临近异频小区 (以下简称异频邻区） 的频点和小区扰码信息， 根据这些信息， 终端设备 会测量异频邻区 PCCPCH上的 RSCP值， 并按照 RSCP测量值对异频邻区 进行排序， 形成一个小区重选的候选邻区集合。 在当前小区的信号质量下 降， 其 RSCP 测量值低于一定的门限值时， 小区重选流程被触发， 终端设 备会依据 RSCP 测量值大小从候选的异频邻区集合中选择一个， 读取其上 的 BCH系统信息。 如果能正确接收到候选异频邻区上的 BCH信息， 并获 得足够重选流程所必需的系统信息， 终端设备则切换频点并驻留到新的 d、 区上， 完成小区重选。 之后， 这个过程周而复始， 保持终端设备的 TD待机 状态；而如果读取所有候选邻区的 BCH信息都失败了，并且随着环境变化， 原驻留小区信号下降也无法驻留， 则终端设备被迫丟失覆盖， 只能通过扫 频和小区盲搜索尝试重新驻留。
传统小区重选策略有一个固有的缺陷： 终端设备完全依靠当前驻留小 区网侧系统消息确定所处环境中的候选异频邻区集合， 并做相应的异频邻 区测量， 也就是说在重选到一个新的小区后， 终端设备会丟弃之前驻留小 区所有的邻区关系及其测量值信息。在 TD网络大规模商用的初期，在一些 特定的环境场景下， 这样的策略可能导致小区重选成功率降低。 一个现场 中实际出现的例子是： 当终端设备从一个覆盖良好的开阔区域移动进入到 一个小区分布呈线性排列的狭长地带时， 原先开阔区域驻留小区 （设为小 区 A ) 的信号快速下降， 触发小区重选流程； 而原驻留小区 A网侧指定的 候选异频邻区中只有一个信号质量相对较强的 （设为小区 B ), 按照网侧的 期待， 这个候选邻区小区 B处在终端设备即将进入的狭长地带中； 由于网 络规划不合理或无线信号的阴影效应等原因， 在当前位置终端设备不能正 确读取小区 B上的系统信息， 而小区 A网侧指定的其它候选邻区也因为信 号太弱读取失败， 最终导致终端设备丟失覆盖被迫发起扫频。
通过实际现场的勘察， 发现在更早的时候， 终端设备曾发生过一次重 选过程， 从另一个小区 （设为小区 C )成功重选到小区 A上； 而直到终端 设备进入到狭长地带后一段时间， 小区 C的信号都能保持不错的水平， 足 够终端设备成功驻留， 且其网侧指定的异频邻区中存在小区 A; 然而虽然 小区 C网侧指定的异频邻区中包含小区 A, 从而终端设备可以正确重选到 小区 A, 但当终端设备重选到小区 A后， 原先小区 C上的所有邻区列表已 经被释放， 且小区 A网侧指定的异频邻区中并不包含小区 C; 所以当终端 设备从小区 A向小区 B重选因为读取 BCH错误而失败时， 它不能选择驻 留到实际上信号强度可以接受的小区 c, 只能丟失覆盖发起扫频盲搜。 以上的例子分析说明， 单纯依靠网侧下发的异频邻区列表来配置终端 设备的测量任务已经不能准确的反映外场瞬息万变的邻区信号强度。 更进 一步， 传统的小区重选策略釆取的重选到一个新的服务小区则丟弃原服务 小区的历史测量信息的策略也有待商榷。 发明内容
有鉴于此，本发明提供一种 TD-SCDMA网络中的小区重选方法及终端 设备，用以解决 TD-SCDMA网络中小区重选时充分利用终端设备邻区测量 的历史值信息， 降低终端设备对网侧指定信息的依赖性的问题。
为解决上述技术问题， 本发明的技术方案是这样实现的：
一种 TD-SCDMA网络中的小区重选方法， 包括：
步骤 A、 当小区重选流程被触发时， 终端设备从其维护的当前驻留小 区网侧指定的异频邻区列表中， 按照主公共控制物理信道 PCCPCH的接收 信号码功率 RSCP 测量值从大到小的顺序， 依次尝试读取相应异频邻区上 的广播信道 BCH信息并重选到 BCH信息能够被成功读取的异频邻区； 步骤 B、 若读取所有当前驻留小区网侧指定的异频邻区的 BCH信息均 失败， 则终端设备从其维护的从前一驻留小区继承的异频邻区列表中， 按 照 PCCPCH的 RSCP测量值从大到小的顺序， 依次尝试读取相应异频邻区 上的 BCH信息并重选到 BCH信息能够被成功读取的异频邻区。
所述当前驻留小区网侧指定的异频邻区列表与所述从前一驻留小区继 承的异频邻区列表组成了邻区历史测量信息表。
所述邻区历史测量信息表中记录的异频邻区数量取决于终端设备的最 大测量能力。
所述邻区历史测量信息表的更新包括：
步骤 m、 所述终端设备重选到一个新小区后， 判断重选前后两个驻留 小区网侧指定的异频邻区列表中是否包含重复的异频邻区， 若是， 将重复 的异频邻区从邻区历史测量信息表中删除， 执行步骤 n, 否则， 直接执行步 骤 n;
步骤 n、 所述终端设备按照先入先出原则， 将重选后驻留小区网侧指定 的异频邻区纳入邻区历史测量信息表的前端， 将表尾端相应个数的历史异 频邻区丟弃， 并将表中其它异频邻区顺次向后移位。
所述邻区历史测量信息表的维护包括： 每个测量周期结束后， 终端设 备首先根据测量结果更新邻区历史测量信息表中对应异频邻区的 PCCPCH 的 RSCP测量值， 然后按照 PCCPCH的 RSCP测量值大小分别对所述当前 驻留小区网侧指定的异频邻区列表及所述从前一驻留小区继承的异频邻区 列表进行降序排序。
所述步骤 B后还包括： 若读取所有从前一驻留小区继承的异频邻区的 BCH信息均失败， 则终端设备继续在当前驻留小区维持驻留， 并返回步骤 A, 直到找到合适的目标小区重选成功， 或因为当前驻留小区信号下降丟失 覆盖而发起扫频和小区盲搜过程。
一种终端设备， 包括：
异频邻区信息维护模块， 用于维护终端设备的当前驻留小区网侧指定 的异频邻区列表及从前一驻留小区继承的异频邻区列表；
第一重选模块， 用于在小区重选流程被触发时， 从异频邻区信息维护 模块维护的当前驻留小区网侧指定的异频邻区列表中， 按照 PCCPCH 的 RSCP测量值从大到小的顺序， 依次尝试读取相应异频邻区上的 BCH信息 并重选到 BCH信息能够被成功读取的异频邻区；
第二重选模块， 用于在读取所有当前驻留小区网侧指定的异频邻区的 BCH信息均失败时， 从异频邻区信息维护模块维护的从前一驻留小区继承 的异频邻区列表中， 按照 PCCPCH的 RSCP测量值从大到 d、的顺序， 依次 尝试读取相应异频邻区上的 BCH信息并重选到 BCH信息能够被成功读取 的异频邻区。
在所述异频邻区信息维护模块中， 当前驻留小区网侧指定的异频邻区 列表与所述从前一驻留小区继承的异频邻区列表组成了邻区历史测量信息 表， 所述邻区历史测量信息表中记录的异频邻区数量取决于终端设备的最 大测量能力。
所述异频邻区信息维护模块具体用于： 在终端设备重选到一个新小区 后， 将重选前后驻留小区网侧指定的异频邻区中重复的小区从邻区历史测 量信息表中删除， 然后按照先入先出原则将重选后驻留小区网侧指定的异 频邻区纳入邻区历史测量信息表的前端， 将表尾端相应个数的历史异频邻 区丟弃， 将表中其它异频邻区顺次向后移位。
所述异频邻区信息维护模块具体用于： 在每个测量周期结束后， 首先 根据测量结果更新邻区历史测量信息表中对应异频邻区的 PCCPCH 的 RSCP测量值， 然后按照 PCCPCH的 RSCP测量值大小分别对所述当前驻 留小区网侧指定的异频邻区列表及所述从前一驻留小区继承的异频邻区列 表进行降序排序。
与现有技术相比， 本发明具有以下有益效果：
本发明技术方案赋予终端设备自发主动的测量能力， 通过充分利用了 终端设备异频邻区测量的历史值信息， 减弱了终端设备对网侧指定异频邻 区信息的依赖性， 提高了终端设备在复杂场景下的小区重选性能， 有效的 提高小区重选的成功率。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对 实施例或现有技术描述中所需要使用的附图作一简单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员 来讲， 在不付出创造性劳动性的前提下， 还可以根据这些附图获得其他的 附图。
图 1为本发明实施例中邻区历史测量信息表的示意图；
图 2为本发明实施例中邻区历史测量信息表更新方法的原理流程示意 图；
图 3为本发明实施例中邻区历史测量信息表的更新过程示意图； 图 4为本发明实施例中 TD-SCDMA网络中的小区重选方法的流程示意 图；
图 5为本发明实施例中终端设备的结构示意图。 具体实施方式
本发明的主要技术构思是： 为提高终端设备对抗复杂环境变化的鲁棒 性， 需要终端设备自发的了解自身所处的环境， 并且在其能力允许的范围 内， 尽量长的保持和更新邻区历史测量信息。 这样， 在无法切换到网侧下 发的测量列表所列的异频邻区时， 终端设备可以尝试从保留的邻区历史信 息中选取信号较好的目标小区， 从而降低丟失覆盖的概率。
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进 行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没 有做出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的 范围。
本发明实施例中， 当小区重选流程被触发时， 终端设备从其维护的当 前驻留小区网侧指定的异频邻区列表中， 按照 PCCPCH的 RSCP测量值从 大到小的顺序，依次尝试读取相应异频邻区上的广播信道 BCH信息并重选 到 BCH信息能够被成功读取的异频邻区； 若读取所有当前驻留小区网侧指 定的异频邻区的 BCH信息均失败， 则终端设备从其维护的从前一驻留小区 继承的异频邻区列表中， 按照 PCCPCH的 RSCP测量值从大到小的顺序， 依次尝试读取相应异频邻区上的 BCH信息并重选到 BCH信息能够被成功 读取的异频邻区。
按照实现的功能点， 本发明实施例的总体方案可以分成三个主要部分： 第一是终端设备对当前环境中异频邻区的自主测量； 第二是邻区历史测量 值的维护和更新； 第三是小区重选目标小区的确定和重选过程。
本发明实施例中终端设备自主测量的要求是： 发挥终端设备物理层的 最大测量能力， 尽可能多并尽可能快的获取当前驻留小区的异频邻区 PCCPCH的 RSCP测量值。 对于某个特定的终端设备， 在一个测量周期内， 终端设备能够完成的异频小区测量个数取决于终端设备的最大测量能力， 最大异频小区测量个数是一个常数， 在这个最大异频小区测量个数的限制 下， 终端设备需要优先保证当前驻留小区网侧指定的异频邻区的 PCCPCH 的 RSCP 测量。 在此基础上， 如果终端设备还具备额外的测量能力， 则终 端设备需要对其维护的除网侧指定的异频邻区外的其它异频邻区的 PCCPCH进行 RSCP测量。
本发明实施例中， 所有异频邻区的 PCCPCH的 RSCP测量值被记录在 一张如图 1 所示的由终端设备自行维护的邻区历史测量信息表中， 这张表 共有 L个元素， 对应终端设备当前驻留小区的 L个可能存在的异频邻区及 其 PCCPCH的 RSCP测量值。 其又进一步被划分为前后两个部分： 前一部 分（N 个元素）是终端设备当前驻留小区网侧指定的需要终端设备测量的 异频邻区及其 PCCPCH的 RSCP测量值， 这些邻区信息可从当前驻留小区 的广播消息上获得； 后一部分（M个元素， M=L-N )是终端设备保存的从 前一个驻留小区继承的部分异频邻区及其 PCCPCH的 RSCP测量值。 可以 看出， 邻区历史测量信息表的元素个数（也即对应终端设备的最大测量能 力）至少需要保证终端设备当前驻留小区网侧指定的所有异频邻区。 请参阅图 2,该图为本发明实施例中邻区历史测量信息表更新方法的原 理流程示意图， 具体步骤如下：
步骤 20、 终端设备重选到一个新小区；
步骤 21、 终端设备判断重选前后两个驻留小区网侧指定的异频邻区列 表中是否包含重复的异频邻区， 若是， 执行步骤 22, 否则， 直接执行步骤 23;
步骤 22、 终端设备将重复的异频邻区从邻区历史测量信息表中删除， 执行步骤 23;
步骤 23、 终端设备按照先入先出原则， 将重选后驻留小区网侧指定的 异频邻区纳入邻区历史测量信息表的前端， 将邻区历史测量信息表尾端相 应个数的历史异频邻区丟弃， 并将邻区历史测量信息表中其它异频邻区顺 次向后移位。
请参阅图 3 ,该图为本发明实施例中邻区历史测量信息表的更新过程示 意图， 其中， 终端设备的邻区历史测量信息表中共有 L个元素， 当终端设 备首次开机驻留小区 A时，邻区历史测量信息表中前 NA个元素来自首次驻 留小区网侧下发的异频邻区列表， 后 L-NA个元素位置置为空。 当终端设备 通过重选过程由小区 A重选到小区 B时， 首先比对当前驻留小区 B网侧指 定的异频邻区列表（设共有个 NB个异频邻区 ), 剔除现有邻区历史测量信 息表中的重复异频邻区， 剩余异频邻区向邻区历史测量信息表前端并拢， 将邻区历史测量信息表后端空出的元素位置置为空； 然后按照先入先出的 原则， 将邻区历史测量信息表中的各个小区顺序向后移动 NB位， 表中前 NB个元素的位置被空出来，表中尾端的 NB个小区被丟弃； 最后使用当前驻 留小区 B网侧下发的异频邻区填充邻区历史测量信息表中的前 NB个位置。 可以看到， 当 L>NB且小区 B 网侧指定的异频邻区和邻区历史测量信息表 中现有异频邻区不重复时， 源小区 A最多有 （L-NB )个异频邻区的历史测 量值被保留下来。
本发明实施例中邻区历史测量信息表的维护方法如下： 每个测量周期 结束后， 终端设备首先根据测量结果更新邻区历史测量信息表中对应异频 邻区的 PCCPCH的 RSCP测量值， 然后按照 PCCPCH的 RSCP测量值大小 分别对其中当前驻留小区网侧指定的异频邻区列表及从前一驻留小区继承 的异频邻区列表进行降序排序。
本发明实施例中， 当终端设备通过开机盲搜或重选过程驻留到一个小 区后， 如果处于没有语音或数据业务的空闲态， 终端设备会周期性的发起 当前驻留小区测量和邻区测量。 其中当前驻留小区测量是为了监控当前驻 留小区的接收信号质量变化， 当信号质量下降而低于预设门限值时， 终端 设备会触发小区重选操作。 邻区测量又分为同频邻区测量和异频邻区测量。 同频邻区测量的目的是为了让终端设备更好的掌握当前环境中的同频干扰 情况， 以提高接收机性能， 此处在本发明实施例中不做展开； 异频邻区的 测量是为了给小区重选提供信号质量合适的候选小区， 也是本发明实施例 关注的重点。 请参阅图 4, 该图为本发明实施例中 TD-SCDMA网络中的小 区重选方法的流程示意图， 其主要包括如下步骤：
步骤 40、 终端设备驻留在一个小区后， 周期性的测量当前驻留小区的 PCCPCH的 RSCP值。
步骤 41、 根据步骤 40 的测量结果， 终端设备判断当前驻留小区的 PCCPCH的 RSCP测量值是否低于预设门限值， 若是， 触发小区重选， 执 行步骤 42, 否则， 维持当前驻留小区的驻留， 返回步骤 40。
步骤 42、 终端设备从其自主维护的邻区历史测量信息表中的当前驻留 小区网侧指定的异频邻区列表中提取第一个元素， 其对应的是该列表中 PCCPCH的历史 RSCP测量值最高的异频邻区， 终端设备将该异频邻区设 为重选目标小区。 步骤 43、 终端设备判断能否正确读取当前设定的重选目标小区的 BCH 信息， 若是， 说明该目标小区信号强度可以允许终端设备在其上驻留， 执 行步骤 50, 否则， 说明该目标小区信号强度已经发生变化不适合驻留， 执 行步骤 44。
步骤 44、 终端设备判断是否已将当前驻留小区网侧指定的异频邻区列 表中的所有异频邻区均设为过重选目标小区， 若是， 执行步骤 46, 否则， 执行步骤 45。
步骤 45、 终端设备从邻区历史测量信息表中的当前驻留小区网侧指定 的异频邻区列表中提取下一个元素， 将其对应的异频邻区指定为重选目标 小区， 返回步骤 43。
步骤 46、 终端设备从其自主维护的邻区历史测量信息表中的从前一驻 留小区继承的异频邻区列表中提取第一个元素， 其对应的是该列表中 PCCPCH的历史 RSCP测量值最高的异频邻区， 终端设备将该异频邻区设 为重选目标小区。
步骤 47、 终端设备判断能否正确读取当前设定的重选目标小区的 BCH 信息， 若是， 说明该目标小区信号强度可以允许终端设备在其上驻留， 执 行步骤 50, 否则， 说明该目标小区信号强度已经发生变化不适合驻留， 执 行步骤 48。
步骤 48、 终端设备判断是否已将从前一驻留小区继承的异频邻区列表 中的所有异频邻区均设为过重选目标小区， 若是， 执行步骤 51 , 否则， 执 行步骤 49。
步骤 49、 终端设备从邻区历史测量信息表中的从前一驻留小区继承的 异频邻区列表中提取下一个元素， 将其对应的异频邻区指定为重选目标小 区， 返回步骤 47。
步骤 50、 终端设备重选到相应的目标小区。 步骤 51、 终端设备判断能否继续在当前驻留小区维持驻留， 若是， 返 回步骤 40, 否则， 执行步骤 52。
步骤 52、 终端设备因为当前驻留小区信号下降丟失覆盖， 发起扫频和 小区盲搜过程。
相应地， 本发明实施例还提供了一种终端设备， 请参阅图 5 , 该图为本 发明实施例中终端设备的结构示意图， 其主要包括异频邻区信息维护模块、 第一重选模块和第二重选模块， 其中，
异频邻区信息维护模块， 用于维护终端设备的当前驻留小区网侧指定 的异频邻区列表及从前一驻留小区继承的异频邻区列表；
第一重选模块， 用于在小区重选流程被触发时， 从异频邻区信息维护 模块维护的当前驻留小区网侧指定的异频邻区列表中， 按照 PCCPCH 的 RSCP测量值从大到小的顺序， 依次尝试读取相应异频邻区上的 BCH信息 并重选到 BCH信息能够被成功读取的异频邻区；
第二重选模块， 用于在读取所有当前驻留小区网侧指定的异频邻区的 BCH信息均失败时， 从异频邻区信息维护模块维护的从前一驻留小区继承 的异频邻区列表中， 按照 PCCPCH的 RSCP测量值从大到 d、的顺序， 依次 尝试读取相应异频邻区上的 BCH信息并重选到 BCH信息能够被成功读取 的异频邻区。
具体地， 在异频邻区信息维护模块中， 当前驻留小区网侧指定的异频 邻区列表与从前一驻留小区继承的异频邻区列表组成了邻区历史测量信息 表， 邻区历史测量信息表中记录的异频邻区数量取决于终端设备的最大测 量能力。
进一步地， 异频邻区信息维护模块在终端设备重选到一个新小区后， 将重选前后驻留小区网侧指定的异频邻区中重复的小区从邻区历史测量信 息表中删除， 然后按照先入先出原则将重选后驻留小区网侧指定的异频邻 区纳入邻区历史测量信息表的前端， 将表尾端相应个数的历史异频邻区丟 弃， 将表中其它异频邻区顺次向后移位； 异频邻区信息维护模块在每个测 量周期结束后， 首先根据测量结果更新邻区历史测量信息表中对应异频邻 区的 PCCPCH的 RSCP测量值， 然后按照 PCCPCH的 RSCP测量值大小分 别对所述当前驻留小区网侧指定的异频邻区列表及所述从前一驻留小区继 承的异频邻区列表进行降序排序。
综上可见， 本发明实施例赋予了终端设备自发主动的测量能力， 使其 对当前环境中异频邻区的自主测量不完全依赖于网侧下发的异频邻区列 表， 而还受限于终端设备的最大测量能力； 在对邻区历史测量值的维护中， 在优先满足网侧指定的异频邻区列表的基础上， 能够尽可能的满足终端设 备自主测量的要求， 有明确的冲突解决机制， 包括测量值列表的先入先出 和即时排序， 从而使得终端设备邻区的历史测量值信息得到了充分利用， 减弱了终端设备对网侧指定信息的依赖性， 提高了终端设备在复杂场景下 的小区重选性能， 有效的提高小区重选的成功率。 本发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权 利要求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在 内。

Claims

权利要求书
1、 一种 TD-SCDMA网络中的小区重选方法， 其特征在于， 包括： 步骤 A、 当小区重选流程被触发时， 终端设备从其维护的当前驻留小 区网侧指定的异频邻区列表中， 按照主公共控制物理信道 PCCPCH的接收 信号码功率 RSCP 测量值从大到小的顺序， 依次尝试读取相应异频邻区上 的广播信道 BCH信息并重选到 BCH信息能够被成功读取的异频邻区； 步骤 B、 若读取所有当前驻留小区网侧指定的异频邻区的 BCH信息均 失败， 则终端设备从其维护的从前一驻留小区继承的异频邻区列表中， 按 照 PCCPCH的 RSCP测量值从大到小的顺序， 依次尝试读取相应异频邻区 上的 BCH信息并重选到 BCH信息能够被成功读取的异频邻区。
2、 如权利要求 1所述的方法， 其特征在于， 所述当前驻留小区网侧指 定的异频邻区列表与所述从前一驻留小区继承的异频邻区列表组成了邻区 历史测量信息表。
3、 如权利要求 2所述的方法， 其特征在于， 所述邻区历史测量信息表 中记录的异频邻区数量取决于终端设备的最大测量能力。
4、 如权利要求 2所述的方法， 其特征在于， 所述邻区历史测量信息表 的更新包括：
步骤 m、 所述终端设备重选到一个新小区后， 判断重选前后两个驻留 小区网侧指定的异频邻区列表中是否包含重复的异频邻区， 若是， 将重复 的异频邻区从邻区历史测量信息表中删除， 执行步骤 n, 否则， 直接执行步 骤 n;
步骤 n、 所述终端设备按照先入先出原则， 将重选后驻留小区网侧指定 的异频邻区纳入邻区历史测量信息表的前端， 将表尾端相应个数的历史异 频邻区丟弃， 并将表中其它异频邻区顺次向后移位。
5、 如权利要求 2至 4中任意一项所述的方法， 其特征在于， 所述邻区 历史测量信息表的维护包括：
每个测量周期结束后， 终端设备首先根据测量结果更新邻区历史测量 信息表中对应异频邻区的 PCCPCH的 RSCP测量值， 然后按照 PCCPCH的 RSCP 测量值大小分别对所述当前驻留小区网侧指定的异频邻区列表及所 述从前一驻留小区继承的异频邻区列表进行降序排序。
6、 如权利要求 1至 4中任意一项所述的方法， 其特征在于， 所述步骤 B后还包括：
步骤 C、 若读取所有从前一驻留小区继承的异频邻区的 BCH信息均失 败， 则终端设备继续在当前驻留小区维持驻留， 并返回步骤 A, 直到找到 合适的目标小区重选成功， 或因为当前驻留小区信号下降丟失覆盖而发起 扫频和小区盲搜过程。
7、 一种终端设备， 其特征在于， 包括：
异频邻区信息维护模块， 用于维护终端设备的当前驻留小区网侧指定 的异频邻区列表及从前一驻留小区继承的异频邻区列表；
第一重选模块， 用于在小区重选流程被触发时， 从异频邻区信息维护 模块维护的当前驻留小区网侧指定的异频邻区列表中， 按照 PCCPCH 的 RSCP测量值从大到小的顺序， 依次尝试读取相应异频邻区上的 BCH信息 并重选到 BCH信息能够被成功读取的异频邻区；
第二重选模块， 用于在读取所有当前驻留小区网侧指定的异频邻区的 BCH信息均失败时， 从异频邻区信息维护模块维护的从前一驻留小区继承 的异频邻区列表中， 按照 PCCPCH的 RSCP测量值从大到 d、的顺序， 依次 尝试读取相应异频邻区上的 BCH信息并重选到 BCH信息能够被成功读取 的异频邻区。
8、 如权利要求 7所述终端设备， 其特征在于， 在所述异频邻区信息维 护模块中， 当前驻留小区网侧指定的异频邻区列表与所述从前一驻留小区 继承的异频邻区列表组成了邻区历史测量信息表， 所述邻区历史测量信息 表中记录的异频邻区数量取决于终端设备的最大测量能力。
9、 如权利要求 7所述终端设备， 其特征在于， 所述异频邻区信息维护 模块具体用于： 在终端设备重选到一个新小区后， 将重选前后驻留小区网 侧指定的异频邻区中重复的小区从邻区历史测量信息表中删除， 然后按照 先入先出原则将重选后驻留小区网侧指定的异频邻区纳入邻区历史测量信 息表的前端， 将表尾端相应个数的历史异频邻区丟弃， 将表中其它异频邻 区顺次向后移位。
10、 如权利要求 7、 8或 9所述终端设备， 其特征在于， 所述异频邻区 信息维护模块具体用于： 在每个测量周期结束后， 首先根据测量结果更新 邻区历史测量信息表中对应异频邻区的 PCCPCH的 RSCP测量值， 然后按 照 PCCPCH的 RSCP测量值大小分别对所述当前驻留小区网侧指定的异频 邻区列表及所述从前一驻留小区继承的异频邻区列表进行降序排序。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114616867A (zh) * 2019-11-07 2022-06-10 富士通株式会社 必要系统信息获取失败时的处理方法及装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103987108A (zh) * 2013-02-08 2014-08-13 意法-爱立信有限公司 初始小区的搜索方法、装置及移动终端
CN103974286B (zh) * 2014-04-16 2018-03-13 北京创毅视讯科技有限公司 一种小区重选方法和装置
CN107484146B (zh) * 2017-10-13 2018-11-27 广东欧珀移动通信有限公司 小区重选的方法、移动终端及计算机可读存储介质
CN111200478A (zh) * 2018-11-19 2020-05-26 晨星半导体股份有限公司 数字卫星广播信号的解调装置与解调方法
CN111447654B (zh) * 2020-04-03 2021-12-14 北京运安智维科技有限公司 轨道交通等线型组网终端在异频小区间的切换方法及系统
CN120456146A (zh) * 2024-02-08 2025-08-08 华为技术有限公司 一种通信方法、通信装置及通信系统
CN119155780B (zh) * 2024-11-15 2025-09-23 杭州必博半导体有限公司 一种移动终端的信号测量方法及相关设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101227204A (zh) * 2007-01-17 2008-07-23 上海宇梦通信科技有限公司 小区频率搜索方法
CN101237707A (zh) * 2008-03-06 2008-08-06 北京天碁科技有限公司 一种于重选或切换过程中检测同频干扰小区的方法
WO2009099162A1 (en) * 2008-02-04 2009-08-13 Nec Corporation Communications system
CN101600242A (zh) * 2009-07-06 2009-12-09 深圳华为通信技术有限公司 小区搜索方法及移动终端

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3764146B2 (ja) * 2003-02-07 2006-04-05 株式会社東芝 無線機における基地局の選択方法、無線機及び制御回路
CN101656941B (zh) * 2008-08-20 2012-11-07 华为技术有限公司 更新邻区信息的方法、装置以及基站
CN101631382B (zh) * 2009-08-14 2011-04-27 北京天碁科技有限公司 在td-scdma网络系统中使用的通信方法和用户设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101227204A (zh) * 2007-01-17 2008-07-23 上海宇梦通信科技有限公司 小区频率搜索方法
WO2009099162A1 (en) * 2008-02-04 2009-08-13 Nec Corporation Communications system
CN101237707A (zh) * 2008-03-06 2008-08-06 北京天碁科技有限公司 一种于重选或切换过程中检测同频干扰小区的方法
CN101600242A (zh) * 2009-07-06 2009-12-09 深圳华为通信技术有限公司 小区搜索方法及移动终端

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114616867A (zh) * 2019-11-07 2022-06-10 富士通株式会社 必要系统信息获取失败时的处理方法及装置
CN114616867B (zh) * 2019-11-07 2024-02-13 富士通株式会社 必要系统信息获取失败时的处理方法及装置

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