WO2015117471A1 - Rrc重建立、原服务小区确认方法、目标基站、终端及*** - Google Patents

Rrc重建立、原服务小区确认方法、目标基站、终端及*** Download PDF

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Publication number
WO2015117471A1
WO2015117471A1 PCT/CN2014/092072 CN2014092072W WO2015117471A1 WO 2015117471 A1 WO2015117471 A1 WO 2015117471A1 CN 2014092072 W CN2014092072 W CN 2014092072W WO 2015117471 A1 WO2015117471 A1 WO 2015117471A1
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serving cell
rrc
base station
original serving
carrier frequency
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PCT/CN2014/092072
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English (en)
French (fr)
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向浩求
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中兴通讯股份有限公司
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Publication of WO2015117471A1 publication Critical patent/WO2015117471A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

Definitions

  • the present invention relates to the field of communications, and in particular, to an RRC re-establishment, an original serving cell confirmation method, a target base station, a terminal, and a system.
  • the RRC (Radio Resource Connection) re-establishment is a very important process in the LTE system. It plays a key role in weakening the call drop perception of users. With the improvement of LTE technology, the re-established application scenarios are also increasing. The re-establishment process is also constantly improved. However, the cell parameters carried in the existing re-establishment process still have certain limitations, and some key parameters are missing. As a result, the success rate and efficiency of re-establishment of some scenarios are not high, and it also affects The success rate of MRO (Mobility Robust Optimize), another important function of LTE.
  • MRO Mobility Robust Optimize
  • a re-establishment process air interface message and a cell to be carried are clearly defined, where the RRC message carries a C-RNTI (Cell-Radio Network Temporary Identity) and a physCellId ( Physical Cell Identity, short cell-address (short Medium Access Control Identity), and Reestablishment Cause, the current process of re-establishing the base station side is: receiving the terminal as the target base station of the target cell After the re-establishment request message is initiated, the target base station queries the base station to query the context information of the terminal according to the c-RNTI and the physCellId in the message.
  • C-RNTI Cell-Radio Network Temporary Identity
  • physCellId Physical Cell Identity, short cell-address (short Medium Access Control Identity)
  • Reestablishment Cause the current process of re-establishing the base station side is: receiving the terminal as the target base station of the target cell After the re-establishment request message is initiated, the target base
  • the base station that receives the re-establishment request message uses the physCellId to the neighbor list. To find out whether there is a cell with the same physical cell identifier, if found, it will broadcast an RLF (Radio Link Failure) message to the neighboring base station containing the physCellId through the X2 channel (herein referred to as each cell in the neighbor list).
  • the corresponding base station is a neighboring base station), and the neighboring base station that receives the RLF message will again utilize c-RNT I and physCellId are used to match whether the terminal context information exists. If the corresponding terminal is found, the subsequent cross-site re-establishment can be continued. It can be seen that when the RRC is re-established, the existing service cell where the terminal is located is only found according to the physCellId, and the following problems may occur:
  • the physCellId of multiple cells on the target base station that receives the re-establishment request message is the same, but when the carrier frequency is different, the target base station does not know which cell has the terminal to be searched, that is, it does not know which cell is the original service of the terminal.
  • the cell can only be randomly queried, and the success rate is relatively low; or traversing each cell, but this will prolong the re-establishment time, affect the user's call drop perception and increase the system overhead and reduce the success rate of the MRO;
  • the target base station that receives the re-establishment request message will initiate an RLF message to multiple neighboring base stations, causing unnecessary overhead of the system;
  • the neighboring base station that receives the RLF message does not know which cell has the terminal to be searched, and can only be random. Query or traverse the words of each cell.
  • the embodiments of the present invention provide an RRC re-establishment and original serving cell acknowledgment method, a target base station, a terminal, and a system, so as to at least solve the problem that the target base station cannot quickly and accurately confirm the original serving cell in the existing RRC re-establishment process, and cause the MRO.
  • the problem of low success rate is a problem that the target base station cannot quickly and accurately confirm the original serving cell in the existing RRC re-establishment process, and cause the MRO.
  • the present invention provides a method for determining an RRC reestablishment original serving cell, including:
  • the target base station searches for the original serving cell from its corresponding cell according to the identity information of the original serving cell and the carrier frequency information.
  • the target base station when the target base station does not find the original serving cell from the corresponding cells according to the identifier information of the original serving cell and the carrier frequency information, the target base station further includes:
  • the target base station searches the neighboring cell list for the neighboring base station to which the original serving cell belongs according to the identity information of the original serving cell and the carrier frequency information;
  • the target eNB sends a second RRC re-establishment request to the neighboring base station, where the second RRC re-establishment request includes the identity information of the original serving cell and carrier frequency information.
  • the carrier frequency information is cell center carrier frequency information or carrier frequency coverage information covered by a cell.
  • the embodiment of the present invention further provides a method for determining an RRC re-establishment original serving cell, including:
  • the communication terminal sends a first RRC re-establishment request to the target base station when the RRC re-establishment is required; the first RRC re-establishment request includes the identity information and the carrier frequency information of the original serving cell where the communication terminal is located.
  • the embodiment of the present invention further provides an RRC re-establishment method, including:
  • the communication terminal sends a first RRC re-establishment request to the target base station;
  • the first RRC re-establishment request includes identifier information and carrier frequency information of the original serving cell where the communication terminal is located;
  • the target base station searches for the original serving cell from its corresponding cell according to the identity information of the original serving cell and the carrier frequency information.
  • the target base station when the target base station does not find the original serving cell from the corresponding cells according to the identifier information of the original serving cell and the carrier frequency information, the target base station further includes:
  • the target base station searches the neighboring cell list for the neighboring base station to which the original serving cell belongs according to the identity information of the original serving cell and the carrier frequency information;
  • the target eNB sends a second RRC re-establishment request to the neighboring base station, where the second RRC re-establishment request includes the identity information of the original serving cell and carrier frequency information;
  • the neighboring base station confirms the original serving cell in its corresponding cell according to the identifier information and the carrier frequency information.
  • the embodiment of the present invention further provides a target base station, including a first information receiving module and a first processing module.
  • the first information receiving module is configured to receive a first RRC re-establishment request sent by the communication terminal, where the first RRC re-establishment request includes identifier information and carrier frequency information of the original serving cell where the communication terminal is located;
  • the first processing module is configured to acquire identification information and carrier frequency information of the original serving cell from the first RRC re-establishment request, and use the identifier information of the original serving cell and carrier frequency information from the target base station.
  • the original serving cell is searched for in each corresponding cell.
  • the method further includes a neighboring cell search module and a first information sending module;
  • the neighboring cell search module is configured to: when the first processing module does not find the original serving cell from each cell corresponding to the target base station according to the identity information of the original serving cell and the carrier frequency information, Defining the identity information of the original serving cell and the carrier frequency information in the neighboring cell list to search for the neighboring base station to which the original serving cell belongs;
  • the first information sending module is configured to send a second RRC re-establishment request to the neighboring base station, where the second RRC re-establishment request includes identifier information and carrier frequency information of the original serving cell.
  • the carrier frequency information is cell center carrier frequency information or carrier frequency coverage information covered by a cell.
  • the embodiment of the present invention further provides a communication terminal, including a second information sending module, configured to send a first RRC re-establishment request to a target base station when the communication terminal needs RRC re-establishment; the first RRC The re-establishment request includes identification information and carrier frequency information of the original serving cell where the communication terminal is located.
  • an embodiment of the present invention further provides a communication system, including a communication terminal and a target base station;
  • the communication terminal is configured to send a first RRC re-establishment request to the target base station when RRC re-establishment is required;
  • the first RRC re-establishment request includes identifier information and carrier frequency information of the original serving cell where the communication terminal is located;
  • the target base station is configured to receive the first RRC re-establishment request sent by the communication terminal, and confirm the original serving cell from each corresponding cell according to the identifier information and carrier frequency information, and based on the confirmed location The original serving cell completes the RRC re-establishment.
  • the method further includes a neighboring base station
  • the target base station When the target base station does not find the original serving cell from its corresponding cell according to the identity information and the carrier frequency information of the original serving cell, the target base station is in the neighboring area according to the identity information of the original serving cell and the carrier frequency information. And searching, in the list, the neighboring base station to which the original serving cell belongs; and sending a second RRC re-establishment request to the neighboring base station, where the second RRC re-establishment request includes the identifier information of the original serving cell and carrier frequency information;
  • the neighboring base station is configured to receive the second RRC re-establishment request, and confirm the original serving cell in each cell corresponding to the neighboring base station according to the identifier information and the carrier frequency information.
  • the RRC re-establishment and the original serving cell acknowledgment method, the target base station, the communication terminal, and the communication system provided by the embodiment of the present invention when the RRC re-establishment, the communication terminal sends a first RRC re-establishment request to the target eNB, the first RRC re-establishment request
  • the target base station obtains the identification information and the carrier frequency information of the original serving cell from the first RRC re-establishment request, and directly according to the identification information of the original serving cell and the carrier frequency information.
  • the original serving cell is searched from its corresponding cell, and the original serving cell is not searched only according to the physCellId.
  • Combining the identification information of the cell with the carrier frequency information of the original serving cell can find the original serving cell of the communication terminal more quickly and accurately, and improve the efficiency of the RRC re-establishment. And accuracy, and ultimately improve the success rate of MRO.
  • FIG. 1 is a schematic flowchart of a method for confirming an original serving cell in an RRC re-establishment process according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural diagram of a communication system according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic structural diagram of a communication terminal according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram 1 of a target base station according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram 2 of a target base station according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram of a neighboring base station according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic diagram of a process of rebuilding in an intra-station board according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic flowchart of a process of rebuilding between boards in a station according to Embodiment 3 of the present invention.
  • FIG. 9 is a schematic flowchart of a station-to-station reconstruction process according to Embodiment 3 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the original serving cell confirmation method in the RRC re-establishment process includes:
  • Step 101 The communication terminal sends a first RRC re-establishment request to the target base station; the first RRC re-establishment request includes identification information of the original serving cell where the communication terminal is located, and carrier frequency information; where the target base station refers to a base station of the target cell, which may be the original base station or other base stations;
  • Step 102 The target eNB receives the first RRC re-establishment request sent by the communication terminal, and obtains the identity information and the carrier frequency information of the original serving cell from the first RRC re-establishment request.
  • Step 103 The target base station searches for the original serving cell from its corresponding cell according to the identity information of the original serving cell and the carrier frequency information.
  • each cell corresponding to the target base station refers to each cell on the base station.
  • the subsequent RRC re-establishment process may continue to be completed based on the confirmed original serving cell.
  • the method includes:
  • the target base station searches the neighboring cell list for the neighboring base station to which the original serving cell belongs according to the identity information of the original serving cell and the carrier frequency information;
  • the target eNB sends a second RRC re-establishment request to the neighboring base station, where the second RRC re-establishment request includes the identity information of the original serving cell and carrier frequency information;
  • the neighboring base station receives the second RRC re-establishment request sent by the target base station;
  • the neighboring base station confirms the original serving cell of the communication terminal in each corresponding cell according to the identifier information and the carrier frequency information in the second RRC re-establishment request.
  • the target eNB may send the second RRC re-establishment request to the neighboring base station by means of the RLF message.
  • the target base station searches for the neighboring base station to which the original serving cell belongs in the neighboring cell list according to the identity information of the original serving cell and the carrier frequency information, and does not confirm the neighboring base station only according to the physCellId, and can avoid the physCellId and the re-establishment request message of multiple neighboring cells.
  • the target base station needs to initiate an RLF message to the multiple neighboring stations, causing a problem of unnecessary overhead of the system, which can improve system resource utilization.
  • the identifier information of the original serving cell is physCellId information; the carrier frequency information of the original serving cell may be the cell center carrier frequency information or the carrier frequency range information covered by the cell, as long as the carrier frequency information can be used for accurate Determine a corresponding cell.
  • the first RRC re-establishment request in this embodiment may further include at least one of c-RNTI, shortMAC-I, Reestablishment Cause, and the like.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the communication system provided in this embodiment includes a communication terminal, a target base station, and a neighbor base station.
  • the communication terminal is configured to send a first RRC re-establishment request to the target base station when the RRC re-establishment is required;
  • the first RRC re-establishment request includes the identifier information of the original serving cell where the communication terminal is located, and carrier frequency information;
  • the target base station is configured to receive the first RRC re-establishment request sent by the communication terminal, confirm the original serving cell according to the identifier information and the carrier frequency information, and complete RRC re-establishment based on the confirmed original serving cell;
  • the target base station is further configured to: when the original serving cell is not found in the corresponding cell according to the identity information and the carrier frequency information of the original serving cell, search for the original service in the neighbor list according to the identity information of the original serving cell and the carrier frequency information. a neighboring base station to which the cell belongs, and sending a second RRC re-establishment request to the neighboring base station, where the second RRC re-establishment request includes the identity information of the original serving cell and the carrier frequency information;
  • the neighboring base station receives the second RRC re-establishment request, and confirms the original serving cell in each cell corresponding to the neighboring base station according to the identifier information and the carrier frequency information.
  • the communication terminal in this embodiment specifically includes a second information sending module, configured to send a first RRC re-establishment request to the target base station when the communication terminal needs RRC re-establishment; the first RRC re-establishment request includes the communication. Identification information and carrier frequency information of the original serving cell where the terminal is located.
  • the target base station in this embodiment includes a first information receiving module and a first processing module.
  • the first information receiving module is configured to receive a first RRC re-establishment request sent by the communication terminal;
  • the first processing module is configured to acquire the identification information of the original serving cell and the carrier frequency information from the first RRC re-establishment request, and search for the original service from each cell corresponding to the target base station according to the identifier information of the original serving cell and the carrier frequency information. Community.
  • the target base station in this embodiment further includes a neighboring area searching module and a first information sending module.
  • the neighboring area searching module is configured to: when the first processing module does not find the original serving cell from the cells corresponding to the target base station according to the identifier information of the original serving cell and the carrier frequency information, according to the identifier information of the original serving cell and the carrier frequency information. Find a neighboring base station to which the original serving cell belongs in the neighbor list;
  • the first information sending module is configured to send a second RRC re-establishment request to the neighboring base station, where the second RRC re-establishment request includes the identity information of the original serving cell and the carrier frequency information.
  • the neighboring base station in this embodiment specifically includes a second information receiving module and a second processing module.
  • the second information receiving module is configured to receive a second RRC re-establishment request sent by the first information sending module
  • the second processing module is configured to confirm the original serving cell in each cell corresponding to the neighboring base station according to the identifier information and the carrier frequency information in the second RRC re-establishment request.
  • the first information sending module of the target base station may send the second RRC re-establishment request to the neighboring base station by means of the RLF message.
  • the target base station searches for the neighboring base station to which the original serving cell belongs in the neighboring cell list according to the identity information of the original serving cell and the carrier frequency information, and does not confirm the neighboring base station only according to the physCellId, and can avoid the physCellId and the re-establishment request message of multiple neighboring cells.
  • the target base station needs to initiate an RLF message to the multiple neighboring stations, causing a problem of unnecessary overhead of the system, which can improve system resource utilization.
  • the identifier information of the original serving cell is the physCellId information; the carrier frequency information of the original serving cell may be the cell center carrier frequency information or the carrier frequency range information covered by the cell, as long as the carrier frequency information can be used to accurately determine one The corresponding cell can be.
  • the first RRC re-establishment request in this embodiment may further include at least one of c-RNTI, shortMAC-I, Reestablishment Cause, and the like.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • Step 701 The communication terminal determines that re-establishment occurs.
  • Step 702 The communication terminal sends a first RRC re-establishment request to the target base station, where the request includes the physCellId information and the central carrier frequency information of the original serving cell of the communication terminal.
  • Step 703 The target base station directly locks the original serving cell and the target cell into the same intra-board cell according to the central carrier frequency information and the physCellId in the first RRC re-establishment request.
  • Step 704 The target base station completes the intra-board reconstruction.
  • Step 705 The target base station sends a re-establishment response message RRC Connectoin Reestablishment to the communication terminal;
  • Step 706 After receiving the response message, the communication terminal feeds back the re-establishment complete message RRC Connectoin Reestablishment Complete to the target base station.
  • the communication terminal when the communication terminal re-establishes the same baseband and the same baseband in the same cell as the target cell, although the physCellId and the CRNTI can be used to locate the cell in which the initial context of the UE belongs, if there are multiple cells in the same board,
  • the initial context information of the UE needs to be traversed for each cell with the same physCellId but different carrier frequencies.
  • the carrier frequency information of the original serving cell is added to the reestablishment request message.
  • Step 801 The communication terminal determines that re-establishment occurs.
  • Step 802 The communication terminal sends a first RRC re-establishment request to the target base station, where the request includes the physCellId information and the central carrier frequency information of the original serving cell of the communication terminal.
  • Step 803 The target base station directly locks the original serving cell and the target cell as cells on different substrates of the same base station according to the central carrier frequency information and the physCellId in the first RRC re-establishment request.
  • Step 804 The target base station completes inter-board reconstruction.
  • Step 805 The target base station sends a re-establishment response message RRC Connectoin Reestablishment to the communication terminal;
  • Step 806 After receiving the response message, the communication terminal feeds back a re-establishment complete message RRC Connectoin Reestablishment Complete to the target base station.
  • Step 901 The communication terminal determines that re-establishment occurs.
  • Step 902 The communication terminal sends a first RRC re-establishment request to the target base station, where the request includes the physCellId information and the central carrier frequency information of the original serving cell of the communication terminal.
  • Step 903 The target base station does not find the original serving cell in each cell according to the central carrier frequency information and the physCellId in the first RRC re-establishment request, but finds the original serving cell in the neighbor list.
  • Step 904 The target base station sends a second RRC re-establishment request to the neighboring base station, where the request also includes the central carrier frequency information of the original serving cell.
  • Step 905 The neighboring base station directly locks the original serving cell according to the central carrier frequency information and the physCellId in the second RRC re-establishment request.
  • Step 906 Perform X2 handover between the neighboring base station and the target base station.
  • Step 907 The target base station sends a re-establishment response message RRC Connectoin Reestablishment to the communication terminal;
  • Step 908 After receiving the response message, the communication terminal feeds back a re-establishment complete message RRC Connectoin Reestablishment Complete to the target base station.
  • the target cell and the original cell that are re-established by the communication terminal belong to different base stations, but there is an X2 link between the base stations, although the physCellId and the CRNTI can be used to locate the cell in which the initial context of the UE belongs.
  • There are multiple baseband boards in the base station and there are multiple cells with different frequencies and the same physCellId.
  • querying the initial context information of the UE needs to traverse each physCellId but Cells with different center carrier frequencies.
  • the carrier frequency information of the original serving cell is added to the reestablishment request message, and when the communication terminal context is queried, the conditional cell can be directly and quickly searched, and it is not necessary to traverse each of the same physCellId cells between the boards. There is no need to traverse each of the same physCellId cells in the board, which will greatly improve query efficiency and save valuable system resources.
  • the triggering condition of the MRO function in the LTE system is determined according to the re-establishment scenario, if the re-establishment cannot be successful or the efficiency is low, the MRO function cannot be performed, for example, when the cross-site re-establishment exists in multiple base stations and multiple cells.
  • the base station is likely to query the same physCellId for the cell without corresponding terminal information, so that the re-establishment rejection is rejected, and the MRO process cannot be triggered, the UE drops the call, and the other case Therefore, after the base station traverses multiple times, the initial context of the corresponding terminal can be found, which takes a relatively long time. It is likely that the UE re-establishment timer expires and the re-establishment fails, so that the MRO process cannot be triggered, and the UE drops the call.
  • the carrier frequency information of the original serving cell is carried in the re-establishment request message, which helps to quickly and accurately lock the original serving cell of the communication terminal, thereby avoiding the occurrence of the above situation and improving the success rate of the MRO.
  • the RRC re-establishment, the original serving cell acknowledgment method, the target base station, the terminal, and the system provided by the embodiment of the present invention have the following beneficial effects: when the RRC re-establishment, the communication terminal sends the first RRC re-establishment to the target base station.
  • the request, the first RRC re-establishment request includes the identity information of the original serving cell where the communication terminal is located, and the carrier frequency information; the target base station acquires the identity information of the original serving cell and the carrier frequency information from the first RRC re-establishment request, according to the original service.
  • the identity information and the carrier frequency information of the cell are directly searched for the original serving cell from the corresponding cells, and the original serving cell is not searched only according to the physCellId.
  • Combining the identification information of the cell with the carrier frequency information of the original serving cell can find the original serving cell of the communication terminal more quickly and accurately, and improve the efficiency of the RRC re-establishment. And accuracy, and ultimately improve the success rate of MRO.

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Abstract

本发明提供了一种无线资源连接（RRC）重建立及原服务小区确认方法、目标基站、通信终端及通信***。在RRC重建立时，通信终端向目标基站发送第一RRC重建立请求（S101），该第一RRC重建立请求包含通信终端所在原服务小区的标识信息和载频信息；目标基站从第一RRC重建立请求中获取原服务小区的标识信息和载频信息（S102），目标基站根据该原服务小区的标识信息和载频信息从其对应的各小区中查找原服务小区（S103），并不是仅根据物理小区标识（physCellId）查找原服务小区。结合小区的标识信息和原服务小区的载频信息可以更快速、准确的查找到通信终端的原服务小区，可提升RRC重建立的效率和准确率，并最终提升移动鲁棒性优化（MRO）的成功率。

Description

RRC重建立、原服务小区确认方法、目标基站、终端及*** 技术领域
本发明涉及通信领域，具体涉及一种RRC重建立、原服务小区确认方法、目标基站、终端及***。
背景技术
在LTE***中RRC(Radio Resource Connection，无线资源连接)重建立是非常重要的流程，对于削弱用户掉话感知度起着关键作用，随着LTE技术的完善，重建立的应用场景也不断增加，重建立流程也不断完善，但是，现有的重建立流程中携的信元参数还是存在一定局限性，缺少一些关键参数，导致有些场景的重建立成功率和效率都不高，而且还会影响到LTE另一个重要功能MRO(Mobility Robust Optimize，移动橹棒性优化)的成功率。具体的，在3GPP标准中，已明确定义了重建立流程空口消息以及所需携带的信元，其中RRC消息中携带c-RNTI(Cell-Radio Network Temporary Identity，小区无线网络临时标识)、physCellId(Physical Cell Identity，物理小区标识)、shortMAC-I(short Medium Access Control Identity,短MAC标识)、Reestablishment Cause(重建立原因)，目前重建立基站侧处理流程为：作为目标小区的目标基站收到终端发起的重建立请求消息后，目标基站根据该消息中的c-RNTI和physCellId到本基站去查询该终端的上下文信息，如果没找到，收到重建立请求消息的基站利用physCellId到邻区列表中去查找是否有相同物理小区标识的小区，如果找到了，将通过X2通道广播发送RLF(Radio Link Failure，无线链路失败)消息到含有该physCellId的邻基站(本文中称邻区列表中各小区对应的基站为邻基站)，收到RLF消息的邻基站会再次利用c-RNTI和physCellId来匹配终端上下文信息是否存在，如果找到对应的终端，才能继续完成后续的跨站重建立。可见，在RRC重建立时，现有仅是根据physCellId来查找终端所在的原服务小区，会存在以下问题：
收到重建立请求消息的目标基站上有多个小区的physCellId相同，但载频不同时，目标基站不知道哪个小区中有需要查找的终端，也即也不知道哪个小区才是终端的原服务小区，因此只能随机的查询，这种成功率相对较低；或者遍历每个小区，但这将延长重建立时间，影响用户掉话感知度同时额外增加***开销，降低MRO的成功率；
(2)如果多个邻区的physCellId都与重建立请求消息中所带physCellId相同时，那么收到重建立请求消息的目标基站将会向多个邻基站发起RLF消息，造成***的无谓开销；
(3)当收到RLF消息的邻基站中有多个小区的physCellId相同，但载频不同时，收到RLF消息的邻基站也不知道是哪个小区中有需要查找的终端，也只能随机的查询或遍历每个小区的话。
发明内容
本发明实施例提供一种RRC重建立及原服务小区确认方法、目标基站、终端及***，以至少解决现有RRC重建立过程中目标基站不能快速、准确的确认原服务小区的问题以及导致MRO的成功率低的问题。
为解决上述技术问题，本发明提供一种RRC重建原服务小区确定方法，包括：
目标基站接收通信终端发送的第一RRC重建立请求，所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息；
所述目标基站从所述第一RRC重建立请求中获取所述原服务小区的标识信息和载频信息；
所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中查找所述原服务小区。
在本发明的一种实施例中，所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中未查找到所述原服务小区时，还包括：
所述目标基站根据所述原服务小区的标识信息和载频信息在邻区列表中查找所述原服务小区归属的邻基站；
所述目标基站发送第二RRC重建立请求给所述邻基站，所述第二RRC重建立请求包含所述原服务小区的标识信息和载频信息。
在本发明的一种实施例中，所述载频信息为小区中心载频信息或小区覆盖的载频范围信息。
为了解决上述问题，本发明实施例还提供了一种RRC重建立原服务小区确定方法，包括：
通信终端在需要RRC重建立时，向目标基站发送第一RRC重建立请求；所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息。
为了解决上述问题，本发明实施例还提供了一种RRC重建立方法，包括：
通信终端向目标基站发送第一RRC重建立请求；所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息；
所述目标基站接收通信终端发送的所述第一RRC重建立请求，从所述第一RRC重建立请求中获取所述原服务小区的标识信息和载频信息；
所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中查找所述原服务小区，
并基于查找到的所述原服务小区完成RRC重建立。
在本发明的一种实施例中，所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中未查找到所述原服务小区时，还包括：
所述目标基站根据所述原服务小区的标识信息和载频信息在邻区列表中查找所述原服务小区归属的邻基站；
所述目标基站发送第二RRC重建立请求给所述邻基站，所述第二RRC重建立请求包含所述原服务小区的标识信息和载频信息；
所述邻基站接收所述目标基站发送的第二RRC重建立请求，；
所述邻基站根据所述标识信息和载频信息在其对应的各小区中确认所述原服务小区。
为了解决上述问题，本发明实施例还提供了一种目标基站，包括第一信息接收模块和第一处理模块，
所述第一信息接收模块设置为接收通信终端发送的第一RRC重建立请求，所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息；
所述第一处理模块设置为从所述第一RRC重建立请求中获取所述原服务小区的标识信息和载频信息，根据所述原服务小区的标识信息和载频信息从所述目标基站对应的各小区中查找所述原服务小区。
在本发明的一种实施例中，还包括邻区查找模块和第一信息发送模块；
所述邻区查找模块设置为在所述第一处理模块根据所述原服务小区的标识信息和载频信息从所述目标基站对应的各小区中未查找到所述原服务小区时，根据所述原服务小区的标识信息和载频信息在邻区列表中查找所述原服务小区归属的邻基站；
所述第一信息发送模块设置为发送第二RRC重建立请求给所述邻基站，所述第二RRC重建立请求包含所述原服务小区的标识信息和载频信息。
在本发明的一种实施例中，所述载频信息为小区中心载频信息或小区覆盖的载频范围信息。
为了解决上述问题，本发明实施例还提供了一种通信终端，包括第二信息发送模块，设置为在通信终端需要RRC重建立时，向目标基站发送第一RRC重建立请求；所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息。
为了解决上述问题，本发明实施例还提供了一种通信***，包括通信终端和目标基站；
所述通信终端设置为在需要RRC重建立时，向所述目标基站发送第一RRC重建立请求；所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息；
所述目标基站设置为接收所述通信终端发送的所述第一RRC重建立请求，根据所述标识信息和载频信息从其对应的各小区中确认所述原服务小区，并基于确认的所述原服务小区完成RRC重建立。
在本发明的一种实施例中，还包括邻基站；
所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中未查找到所述原服务小区时，根据所述原服务小区的标识信息和载频信息在邻区列表中查找所述原服务小区归属的邻基站；并发送第二RRC重建立请求给所述邻基站，所述第二RRC重建立请求包含所述原服务小区的标识信息和载频信息；
所述邻基站设置为接收所述第二RRC重建立请求，以及根据所述标识信息和载频信息在所述邻基站对应的各小区中确认所述原服务小区。
本发明实施例的有益效果是：
本发明实施例提供的RRC重建立及原服务小区确认方法、目标基站、通信终端及通信***，在RRC重建立时，通信终端向目标基站发送第一RRC重建立请求，该第一RRC重建立请求包含通信终端所在原服务小区的标识信息和载频信息；目标基站从第一RRC重建立请求中获取原服务小区的标识信息和载频信息，根据该原服务小区的标识信息和载频信息直接从其对应的各小区中查找原服务小区，并不是仅根据physCellId查找原服务小区。结合小区的标识信息和原服务小区的载频信息(例如小区的中心载频信息或者载频范围信息等)可以更快速、准确的查找到通信终端的原服务小区，可提升RRC重建立的效率和准确率，并最终提升MRO的成功率。
附图说明
图1为本发明实施例一提供的RRC重建立过程中原服务小区确认方法流程示意图；
图2为本发明实施例二提供的通信***结构示意图；
图3为本发明实施例二提供的通信终端结构示意图；
图4为本发明实施例二提供的目标基站结构示意图一；
图5为本发明实施例二提供的目标基站结构示意图二；
图6为本发明实施例二提供的邻基站结构示意图；
图7为本发明实施例三提供的站内板内重建流程示意图；
图8为本发明实施例三提供的站内板间重建流程示意图；
图9为本发明实施例三提供的站间重建流程示意图。
具体实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。
实施例一：
请参见图1所示，本实施例提供的RRC重建立过程中原服务小区确认方法包括：
步骤101：通信终端向目标基站发送第一RRC重建立请求；该第一RRC重建立请求包含通信终端所在原服务小区的标识信息和载频信息；此处的目标基站是指在重建过程中作为目标小区的基站，该基站可能是原基站，也可能是其他基站；
步骤102：目标基站接收通信终端发送的第一RRC重建立请求，从第一RRC重建立请求中获取所述原服务小区的标识信息和载频信息；
步骤103：目标基站根据该原服务小区的标识信息和载频信息从其对应的各小区中查找原服务小区。此处目标基站对应的各小区是指该基站上的各小区。
当目标基站确认通信终端的原服务小区之后，可基于确认的原服务小区继续完成后续RRC重建立过程。
本实施例中，当在目标基站上能查找到对应的原服务小区时，存在该基站上同一板内完成建立的情况和该基站上不同板间完成建立的情况。在后面的实施例中会具体说明。当目标基站根据原服务小区的标识信息和载频信息从其各小区中没有查找到原服务小区时，还包括：
目标基站根据原服务小区的标识信息和载频信息在邻区列表中查找原服务小区归属的邻基站；
目标基站发送第二RRC重建立请求给邻基站，第二RRC重建立请求包含所述原服务小区的标识信息和载频信息；
邻基站接收目标基站发送的第二RRC重建立请求；
邻基站根据第二RRC重建立请求中的标识信息和载频信息在其对应的各小区中确认通信终端的原服务小区。
本实施例中，目标基站可通过RLF消息的方式向邻基站发送第二RRC重建立请求。目标基站根据原服务小区的标识信息和载频信息在邻区列表中查找原服务小区归属的邻基站，并不是仅根据physCellId确认邻基站，可避免多个邻区的physCellId都与重建立请求消息中所带physCellId相同时，目标基站需将会向这多个邻站发起RLF消息，造成***的无谓开销的问题，可提升***资源利用率。
本实施例中，原服务小区的标识信息为physCellId信息；原服务小区的载频信息可为小区中心载频信息或小区覆盖的载频范围信息，只要该载频信息可以用于准确的 确定一个对应的小区即可。本实施例中的第一RRC重建立请求还可包括c-RNTI、shortMAC-I、Reestablishment Cause等中的至少一种。
实施例二：
请参见图2所示，本实施例提供的通信***包括通信终端、目标基站和邻基站；
通信终端设置为在需要RRC重建立时，向目标基站发送第一RRC重建立请求；该第一RRC重建立请求包含通信终端所在原服务小区的标识信息和载频信息；
目标基站设置为接收通信终端发送的第一RRC重建立请求，根据标识信息和载频信息确认原服务小区，并基于确认的原服务小区完成RRC重建立；
目标基站还设置为根据原服务小区的标识信息和载频信息从其对应的各小区中未查找到原服务小区时，根据原服务小区的标识信息和载频信息在邻区列表中查找原服务小区归属的邻基站，并发送第二RRC重建立请求给邻基站，第二RRC重建立请求包含原服务小区的标识信息和载频信息；
邻基站接收第二RRC重建立请求，以及根据标识信息和载频信息在邻基站对应的各小区中确认原服务小区。
请参见图3所示，本实施例中通信终端具体包括第二信息发送模块，设置为在通信终端需要RRC重建立时，向目标基站发送第一RRC重建立请求；第一RRC重建立请求包含通信终端所在原服务小区的标识信息和载频信息。
具体的，请参见图4所示，本实施例中的目标基站包括第一信息接收模块和第一处理模块，
第一信息接收模块设置为接收通信终端发送的第一RRC重建立请求；
第一处理模块设置为从第一RRC重建立请求中获取原服务小区的标识信息和载频信息，根据原服务小区的标识信息和载频信息从目标基站对应的各小区中查找所述原服务小区。
请参见图5所示，本实施例中的目标基站还包括邻区查找模块和第一信息发送模块；
邻区查找模块设置为在第一处理模块根据原服务小区的标识信息和载频信息从目标基站对应的各小区中未查找到原服务小区时，根据原服务小区的标识信息和载频信息在邻区列表中查找原服务小区归属的邻基站；
第一信息发送模块设置为发送第二RRC重建立请求给邻基站，第二RRC重建立请求包含原服务小区的标识信息和载频信息。
请参见图6所示，本实施例中的邻基站具体包括第二信息接收模块和第二处理模块；
第二信息接收模块设置为接收第一信息发送模块发送的第二RRC重建立请求；
第二处理模块设置为根据第二RRC重建立请求中的标识信息和载频信息在邻基站对应的各小区中确认原服务小区。
本实施例中，目标基站的第一信息发送模块可通过RLF消息的方式向邻基站发送第二RRC重建立请求。目标基站根据原服务小区的标识信息和载频信息在邻区列表中查找原服务小区归属的邻基站，并不是仅根据physCellId确认邻基站，可避免多个邻区的physCellId都与重建立请求消息中所带physCellId相同时，目标基站需将会向这多个邻站发起RLF消息，造成***的无谓开销的问题，可提升***资源利用率。
本实施例中，原服务小区的标识信息为physCellId信息；原服务小区的载频信息可为小区中心载频信息或小区覆盖的载频范围信息，只要该载频信息可以用于准确的确定一个对应的小区即可。本实施例中的第一RRC重建立请求还可包括c-RNTI、shortMAC-I、Reestablishment Cause等中的至少一种。
实施例三：
为了更好的理解本发明，下面结合具体的几种应用场景对本发明的方案进行详细的说明。
请参见图7所示，该图所示为站内板内重建立过程：
步骤701：通信终端判断重建立发生；
步骤702：通信终端向目标基站发送第一RRC重建立请求，该请求中包括physCellId信息和通信终端原服务小区的中心载频信息；
步骤703：目标基站根据第一RRC重建立请求中的中心载频信息、physCellId直接锁定原服务小区与目标小区为同一板内小区；
步骤704：目标基站完成板内重建；
步骤705：目标基站向通信终端发送重建立响应消息RRC Connectoin Reestablishment；
步骤706：通信终端收到该响应消息后，向目标基站反馈重建立完成消息RRC Connectoin Reestablishment Complete。
根据上述处理过程可知，当通信终端发生重建立原小区和目标小区同一基站内且同一基带板时，虽然可以利用physCellId和CRNTI定位到UE初始上下文归属在哪个小区中，但如果同一板内存在多个异频且具有同physCellId的小区时，查询UE初始上下文信息需要遍历每一个同physCellId但不同载频的小区，而本实施例中在重建请求消息中增加了原服务小区的载频信息，板内查询通信终端上下文归属时，也即通信终端的原服务小区时，就可以直接快速的查找满足条件小区，这样会大大提升查询效率和节能宝贵的***资源。
请参见图8所示，该图所示为站内板间重建立过程：
步骤801：通信终端判断重建立发生；
步骤802：通信终端向目标基站发送第一RRC重建立请求，该请求中包括physCellId信息和通信终端原服务小区的中心载频信息；
步骤803：目标基站根据第一RRC重建立请求中的中心载频信息、physCellId直接锁定原服务小区与目标小区为同一基站不同基板上的小区；
步骤804：目标基站完成板间重建；
步骤805：目标基站向通信终端发送重建立响应消息RRC Connectoin Reestablishment；
步骤806：通信终端收到该响应消息后，向目标基站反馈重建立完成消息RRC Connectoin Reestablishment Complete。
根据上述处理过程可知，当通信终端发生重建立的目标小区和原小区在同一基站内但不同基带板时，虽然可以利用physCellId和CRNTI定位到UE初始上下文归属在 哪个小区中，如果该基站内有多块基带板，并存在多个异频且具有同physCellId的小区时，查询UE初始上下文信息需要遍历每一个同physCellId但不同中心载频的小区，而本实施例中在重建请求消息中增加了原服务小区的载频信息，查询通信终端上下文归属时，就可以直接快速的查找满足条件小区，不需要在板间遍历每一个相同physCellId小区，也不需要在板内遍历每一个相同physCellId小区，这样会大大提升查询效率和节能宝贵的***资源。
请参见图9所示，该图所示为站间重建立过程：
步骤901：通信终端判断重建立发生；
步骤902：通信终端向目标基站发送第一RRC重建立请求，该请求中包括physCellId信息和通信终端原服务小区的中心载频信息；
步骤903：目标基站根据第一RRC重建立请求中的中心载频信息、physCellId在其各小区中未找到原服务小区，但在邻区列表中找到了原服务小区；
步骤904：目标基站向邻基站发送第二RRC重建立请求，该请求中也包含原服务小区的中心载频信息；
步骤905：邻基站根据第二RRC重建立请求中的中心载频信息、physCellId直接锁定原服务小区；
步骤906：邻基站与目标基站之间完成X2切换；
步骤907：目标基站向通信终端发送重建立响应消息RRC Connectoin Reestablishment；
步骤908：通信终端收到该响应消息后，向目标基站反馈重建立完成消息RRC Connectoin Reestablishment Complete。
根据上述处理过程可知，当通信终端发生重建立的目标小区和原小区分属为不同基站，但基站间存在X2链路，虽然可以利用physCellId和CRNTI定位到UE初始上下文归属在哪个小区中，如果该基站内有多块基带板，并存在多个异频且具有同physCellId的小区，另外邻区列表中存在多个站的且physCellId相同小区时，查询UE初始上下文信息需要遍历每一个同physCellId但不同中心载频的小区。而本实施例中在重建请求消息中增加了原服务小区的载频信息，查询通信终端上下文归属时，就可以直接快速的查找满足条件小区，不需要在板间遍历每一个相同physCellId小区，也 不需要在板内遍历每一个相同physCellId小区，这样会大大提升查询效率和节能宝贵的***资源。
由于LTE***中的MRO功能触发条件是根据重建立场景来判决，如果重建立一直不能成功或效率较低时，会导致MRO功能不能执行，例如，当跨站重建立存在多个基站多小区的physCellId相同，但中心载频不同时，该场景下，基站很可能查询相同physCellId的小区下没有对应的终端信息，从而回复重建立拒绝，导致MRO流程一直无法触发，UE掉话，另一种情况为，基站多次遍历后才能查找到对应终端初始上下文，耗时相对较长，很可能UE的重建立定时器超时后，重建立失败，从而MRO流程也无法触发，UE掉话。而通过本申请提供的方案，在重建立请求消息中携带原服务小区的载频信息，有助于快速、准确的锁定通信终端原服务小区，进而避免上述情况的发生，提升MRO的成功率。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。
工业实用性
如上所述，本发明实施例提供的一种RRC重建立、原服务小区确认方法、目标基站、终端及***，具有以下有益效果：在RRC重建立时，通信终端向目标基站发送第一RRC重建立请求，该第一RRC重建立请求包含通信终端所在原服务小区的标识信息和载频信息；目标基站从第一RRC重建立请求中获取原服务小区的标识信息和载频信息，根据该原服务小区的标识信息和载频信息直接从其对应的各小区中查找原服务小区，并不是仅根据physCellId查找原服务小区。结合小区的标识信息和原服务小区的载频信息(例如小区的中心载频信息或者载频范围信息等)可以更快速、准确的查找到通信终端的原服务小区，可提升RRC重建立的效率和准确率，并最终提升MRO的成功率。

Claims (12)

  1. 一种RRC重建立原服务小区确定方法，包括：
    目标基站接收通信终端发送的第一RRC重建立请求，所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息；
    所述目标基站从所述第一RRC重建立请求中获取所述原服务小区的标识信息和载频信息；
    所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中查找所述原服务小区。
  2. 如权利要求1所述的RRC重建立原服务小区确定方法，其中，所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中未查找到所述原服务小区时，还包括：
    根据所述原服务小区的标识信息和载频信息在邻区列表中查找所述原服务小区归属的邻基站；
    所述目标基站发送第二RRC重建立请求给所述邻基站，所述第二RRC重建立请求包含所述原服务小区的标识信息和载频信息。
  3. 如权利要求1或2所述的RRC重建立过程中原服务小区确定方法，其中，所述载频信息为小区中心载频信息或小区覆盖的载频范围信息。
  4. 一种RRC重建立原服务小区确定方法，包括：
    通信终端在需要RRC重建立时，向目标基站发送第一RRC重建立请求；所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息。
  5. 一种RRC重建立方法，包括：
    通信终端向目标基站发送第一RRC重建立请求；所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息；
    所述目标基站接收通信终端发送的所述第一RRC重建立请求，从所述第一RRC重建立请求中获取所述原服务小区的标识信息和载频信息；
    所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中查找所述原服务小区，并基于查找到的所述原服务小区完成RRC重建立。
  6. 如权利要求5所述的RRC重建立方法，其中，所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中未查找到所述原服务小区时，还包括：
    所述目标基站根据所述原服务小区的标识信息和载频信息在邻区列表中查找所述原服务小区归属的邻基站；
    所述目标基站发送第二RRC重建立请求给所述邻基站，所述第二RRC重建立请求包含所述原服务小区的标识信息和载频信息；
    所述邻基站接收所述目标基站发送的第二RRC重建立请求；
    所述邻基站根据所述标识信息和载频信息在其对应的各小区中确认所述原服务小区。
  7. 一种目标基站，包括第一信息接收模块和第一处理模块，
    所述第一信息接收模块设置为接收通信终端发送的第一RRC重建立请求，所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息；
    所述第一处理模块设置为从所述第一RRC重建立请求中获取所述原服务小区的标识信息和载频信息，根据所述原服务小区的标识信息和载频信息从所述目标基站对应的各小区中查找所述原服务小区。
  8. 如权利要求7所述的目标基站，其中，还包括邻区查找模块和第一信息发送模块；
    所述邻区查找模块设置为在所述第一处理模块根据所述原服务小区的标识信息和载频信息从所述目标基站对应的各小区中未查找到所述原服务小区时，根据所述原服务小区的标识信息和载频信息在邻区列表中查找所述原服务小区归属的邻基站；
    所述第一信息发送模块设置为发送第二RRC重建立请求给所述邻基站，所述第二RRC重建立请求包含所述原服务小区的标识信息和载频信息。
  9. 如权利要求7或8所述的目标基站，其中，所述载频信息为小区中心载频信息或小区覆盖的载频范围信息。
  10. 一种通信终端，包括第二信息发送模块，设置为在通信终端需要RRC重建立时，向目标基站发送第一RRC重建立请求；所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息。
  11. 一种通信***，包括通信终端和目标基站；
    所述通信终端设置为在需要RRC重建立时，向所述目标基站发送第一RRC重建立请求；所述第一RRC重建立请求包含所述通信终端所在原服务小区的标识信息和载频信息；
    所述目标基站设置为接收所述通信终端发送的所述第一RRC重建立请求，根据所述标识信息和载频信息从其对应的各小区中确认所述原服务小区，并基于确认的所述原服务小区完成RRC重建立。
  12. 如权利要求11所述的通信***，其中，还包括邻基站；
    所述目标基站根据所述原服务小区的标识信息和载频信息从其对应的各小区中未查找到所述原服务小区时，根据所述原服务小区的标识信息和载频信息在邻区列表中查找所述原服务小区归属的邻基站；并发送第二RRC重建立请求给所述邻基站，所述第二RRC重建立请求包含所述原服务小区的标识信息和载频信息；
    所述邻基站设置为接收所述第二RRC重建立请求，以及根据所述标识信息和载频信息在所述目标基站对应的各小区中确认所述原服务小区。
PCT/CN2014/092072 2014-07-25 2014-11-24 Rrc重建立、原服务小区确认方法、目标基站、终端及*** WO2015117471A1 (zh)

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