WO2015158034A1 - 一种返回长期演进小区的方法、终端 - Google Patents

一种返回长期演进小区的方法、终端 Download PDF

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Publication number
WO2015158034A1
WO2015158034A1 PCT/CN2014/079515 CN2014079515W WO2015158034A1 WO 2015158034 A1 WO2015158034 A1 WO 2015158034A1 CN 2014079515 W CN2014079515 W CN 2014079515W WO 2015158034 A1 WO2015158034 A1 WO 2015158034A1
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Prior art keywords
cell
long
term evolution
module
measurement
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PCT/CN2014/079515
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English (en)
French (fr)
Inventor
杨惠
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中兴通讯股份有限公司
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Publication of WO2015158034A1 publication Critical patent/WO2015158034A1/zh

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    • 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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • 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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies

Definitions

  • the present invention relates to mobile communication technologies, and in particular, to a method and a terminal for returning a long term evolution cell. Background technique
  • the long-term evolution (LTE, Long Term Evolution) and circuit domain (CS, Circuit Switched) dual-mode terminal wireless module is a single wireless mode, that is, with LTE and UMTS Terrestrial Radio Access Network (UTRAN, UMTS Terrestrial Radio Access Network) / GERAN (GSM EDGE Radio Access Network) Dual-mode or multi-mode terminal with access capability, when using LTE access, cannot receive/transmit circuit domain service signals.
  • a CS service such as a voice service under LTE access
  • PS Packet Switch
  • the core network of the circuit domain mainly includes a mobile interaction center (MSC, Mobile Switching Center).
  • MME Mobility Management Entity
  • MSC Mobile Switching Center
  • EMM EPS Mobility Management
  • the MSC When the MSC receives a CS called service, the MSC sends a paging message to the MME through the SGs interface, and the MME pages the UE through the E-UTRAN network. After receiving the paging message, the UE needs to first fall back to the circuit domain. Then, the subsequent processing of the called service is completed.
  • the above structure and calling and called services The processing method can be called CSFB.
  • UMTS Universal Mobile Telecommunications System
  • how to return the voice call to the LTE network after the voice call ends is a problem for the UE to process the voice call service back to the 3G network.
  • the speed of the LTE network is faster than that of the 3G ⁇ 2G network. After the voice call ends, it should return to the 4G network to enable users to enjoy higher-speed data service services.
  • the existing technology generally redirects to the LTE cell through the RRC ConnectionRelease message when the UE is in the IDLE MODE, when the cell reselection operation or the UE transitions from the Connected state to the IDLE state.
  • this is usually invalid, that is, only when the UE completes the data service in the 3G cell, it is possible to return to the LTE network.
  • Another method can enable the user terminal to return to the LTE cell without interrupting the data service, specifically: when the user terminal detects that the communication quality of the current serving cell is not good, triggering measurement on the neighboring cell, if the neighboring cell If the communication quality is better than the current serving cell, the network side sends a handover command to the user terminal, and the terminal returns to the cell with better communication quality.
  • the disadvantage of this method is that the handover operation must be triggered when the communication quality of the current serving cell is poor and the communication quality of the neighboring cell reaches a certain requirement, so that the current communication d and the area have good communication quality. Return to the LTE cell. Summary of the invention
  • a method and a terminal for returning to a long term evolution cell are provided, and the solution is used.
  • the problem of returning to the long-term evolution cell can be completed only when the communication quality of the current serving cell is not good, without interrupting the data service.
  • An embodiment of the present invention provides a method for returning a long-term evolved cell. After the user terminal uses the circuit-switched fallback technology to complete the voice service, the method further includes: determining whether the detection result of the current serving cell's communication quality meets the pre-evolution cell measurement pre-test If the condition is not, the detection result is processed such that the detection result of the communication quality of the current serving cell meets the preset condition to initiate measurement of the long-term evolved cell; and returns to the long-term evolved cell according to the result of the measurement of the long-term evolved cell.
  • the preset condition comprises: triggering a 2d event.
  • the detection result of the communication quality of the current service's area includes: a measurement value of the current serving cell obtained by measuring the parameter corresponding to the communication quality of the current serving cell; and initiating the measurement of the long-term evolution cell
  • the preset condition includes: the measured value of the current serving cell is within a preset range of the triggered 2d event; processing the detection result includes: modifying the measured value of the current serving cell to be within a preset range of the triggered 2d event.
  • the step of finally returning to the long term evolution cell according to the result of the long term evolution cell measurement includes: determining whether the measurement result of the long term evolution cell satisfies a preset condition for triggering the handover cell, and when no, for long term evolution The cell measurement result is processed to satisfy the preset condition of triggering the handover cell.
  • the triggering the preset condition of the handover cell comprises: triggering at least one of the events 3a, 3d.
  • the process of measuring the long-term evolution cell includes: measuring a parameter corresponding to the communication quality of the long-term evolution cell; and the preset condition for triggering the handover cell includes: measuring a parameter corresponding to the communication quality of the long-term evolution cell The value is within a preset range that triggers the 3a and/or 3d event; processing the long term evolution cell measurement result includes: measurements on the long term evolution cell Modifications are made to be within the preset range for triggering 3a and/or 3d events.
  • the method before determining whether the detection result of the communication quality of the current serving cell meets the preset condition for initiating the long-term evolution cell measurement, the method further includes: determining whether the detection signal of the long-term evolution cell sent by the network side is received If yes, the communication quality of the current serving cell is detected, and if not, the data volume of the data service of the user terminal of the network side is continuously decreased, so that the network side converts the user terminal to the cell forward access channel state (that is, In the CELL_FACH state, the user terminal quickly returns to the long term evolution cell by reselecting the cell operation.
  • the detection signal of the long-term evolution cell sent by the network side is received If yes, the communication quality of the current serving cell is detected, and if not, the data volume of the data service of the user terminal of the network side is continuously decreased, so that the network side converts the user terminal to the cell forward access channel state (that is, In the CELL_FACH state, the user terminal quickly returns to the long term evolution cell by reselecting
  • the user terminal notifies the network side user terminal that the data volume of the data service is continuously reduced by reporting the event to the network side.
  • the embodiment of the present invention further provides a user terminal, including a first determining module, a measuring module, a processing module, and a switching network module;
  • the first judging module is configured to determine whether the communication quality of the current serving cell meets a preset condition for initiating long-term evolution cell measurement after the user terminal adopts the circuit switched fallback technology to end the voice service, and if yes, notify the measurement module, if not, Then notify the processing module;
  • a measurement module configured to measure a long term evolution cell
  • the processing module is configured to process the detection result so that the detection result of the communication quality of the current service 'j, the area meets a preset condition, thereby initiating measurement of the long-term evolved cell;
  • the handover network module is configured to eventually return to the long term evolved cell according to the result of the long term evolution cell measurement.
  • the switching network module further includes a determining submodule and a processing submodule; wherein
  • a determining sub-module configured to determine whether the measurement result of the long-term evolved cell meets a preset condition for triggering the handover cell, and when no, notify the processing sub-module;
  • the processing submodule is configured to process the long term evolution cell measurement result to meet a preset condition for triggering the handover cell.
  • the user terminal further includes a second determining module, a detecting module, a notification module, and a reselecting module;
  • the second judging module is configured to determine whether the communication quality of the current service 'j, the area meets the preset condition for initiating the long-term evolution cell measurement, and determine whether the detection signaling of the long-term evolved cell sent by the network side is received, and if yes, notify Detection module detection;
  • a detecting module configured to detect a communication quality of the current serving cell and obtain a detection result, and if not, notify the notification module;
  • the notification module is configured to notify the network side user terminal that the data traffic of the user terminal is continuously reduced, so that the network side converts the user terminal to the cell forward access channel state (that is, the CELL_FACH state);
  • the reselection module is configured to reselect the cell to enable the user terminal to quickly return to the long term evolution cell.
  • the module and the reselection module may use a central processing unit (CPU), a digital signal processor (DSP, Digital Singnal) when performing processing.
  • CPU central processing unit
  • DSP digital signal processor
  • the method and the terminal for returning a long term evolution cell provided by the embodiment of the present invention can solve the communication quality in the current serving cell when the QoS service is required to be returned to the LTE network after the CSFB technology is used for the voice service. In the better case, the problem of long-term evolution d and area cannot be returned.
  • the method provided by the present invention first determines whether the detection result of the communication quality of the current serving cell satisfies the preset condition for initiating the long-term evolution cell measurement.
  • the current The detection result of the communication quality of the serving cell satisfies a preset condition so that the user terminal can initiate the long-term evolved cell The measurement, and finally returns to the long term evolution cell based on the results of the long term evolution cell measurement.
  • the method of the present invention is used to process the detection result, and the detection result is forced to meet the preset condition, thereby triggering the long-term evolution cell.
  • the handover condition is generally satisfied, so that the user terminal performs network handover, and the user terminal returns to the long-term evolution network.
  • the method for returning the long-term evolution network does not require the UE to send the signaling connection release of the PS domain, so there is no need to interrupt the data service or wait for the end of the data service in the process of returning to the long-term evolution network.
  • FIG. 1 is a schematic flowchart of a method for returning a long term evolution cell according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of a method for returning a long term when a user terminal does not receive detection signaling of a long term evolved cell sent by a network side according to Embodiment 1 of the present invention
  • Schematic diagram of a method for evolving a cell
  • FIG. 3 is a schematic flowchart of a method for returning a long term evolution cell according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic structural diagram of a user terminal according to Embodiment 3 of the present invention. detailed description
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the UE performs service data on the LTE network.
  • the calling or called party uses the CSFB technology to fall back to the 2G or 3G network for voice service.
  • the present invention will be described by taking an example of falling back to the UMTS network.
  • the current serving cell of the UE is a UMTS cell, that is, the UE is connected to the UMTS network and has not returned to the LTE network.
  • there is still data service in progress causing the UE to be in the RRC Connected state.
  • Step S101 Determine whether the detection result of the current service 'j, the communication quality of the area meets the preset condition for initiating the long-term evolution cell measurement, if If not satisfied, step S102 is performed; if yes, step S103 is performed;
  • the values of the communication quality of the current serving cell are usually received signal code power (RSCP, Received Signal Code Power), Ec/No, reference signal received power (RSRP), reference signal received quality (RSRQ), and the like;
  • the preset condition may be set to a measurement value of the communication quality of the current serving cell below a certain value, such as a 2d event.
  • the 2d event is one of the common events in the inter-frequency handover.
  • the 2d event is prepared to initiate the handover, that is, the current frequency is found to be of poor quality, thereby starting the measurement of other frequency points.
  • the current serving cell needs to be measured to obtain the current serving cell measurement value, and the threshold value of the 2d event is also required. If the current serving cell measurement value is lower than the 2d event threshold, the trigger is triggered. 2d event, while the current measured value of the serving cell is within the preset range of the triggered 2d event.
  • Step S102 The detection result is processed such that the detection result of the communication quality of the current serving cell meets a preset condition to initiate measurement of the long-term evolved cell;
  • the 2d event threshold is: -96dbm, that is, when the measured value of the current serving cell is less than or equal to -96dbm, the 2d event is triggered to meet the measurement start rule.
  • the actual measurement value of the UMTS network by the UE is -80 dbm.
  • the UE can report the 2d event and inform the network side that it is satisfied.
  • the measurement start rule is measured, and then the measurement object can be measured.
  • Step S103 Perform measurement on the long-term evolved cell to obtain a measured value of the long-term evolved cell.
  • Step S104 Finally return to the long-term evolved cell according to the result of the long-term evolved cell measurement. After obtaining the measured value, it is determined whether the measurement result of the long-term evolution cell satisfies a preset condition for triggering the handover cell, and the handover cell refers to handover from the current serving cell to the LTE cell. Because the performance of the long-term evolution cell is generally better than the current serving cell, the preset switching condition is generally met, so that the user terminal performs network switching, and the user terminal returns to the long-term evolved cell.
  • the long-term evolved cell measurement result is processed to meet the preset condition of triggering the handover cell, without satisfying the preset condition of triggering the handover cell.
  • the preset condition for triggering the handover of the cell may be at least one of the triggering events 3a, 3d.
  • the 3a event is: The signal quality of the current 3G cell is lower than a threshold and the signal quality of the system cell is higher than a threshold.
  • the 3d event is: The best cell has changed, and the signal quality of the different system cell is the best.
  • the process of measuring the long-term evolution cell includes: measuring a parameter corresponding to the communication quality of the long-term evolution cell; and the preset conditions for triggering the handover cell include: The measured value of the corresponding parameter is within a preset range of the triggering 3a and/or 3d event; processing the long-term evolution cell measurement result includes: modifying the measured value of the long-term evolution cell to trigger 3a and/or 3d The preset range of events.
  • the 3a event threshold is: 96dbm, that is, when the measured value of the long-term evolution cell is greater than or equal to 96dbm, the event 3a is triggered.
  • the actual measurement value of the LTE network by the UE is 80dbm.
  • the method further includes: determining whether the user terminal receives the detection signaling of the long-term evolved cell sent by the network side.
  • the detection signaling is information that is sent by the network side to notify the user terminal to detect the long-term evolution network, including detecting configuration.
  • Step 301 if yes, the step S101 is executed, if not, the data volume of the data service of the user terminal on the network side is continuously decreased, so that the network side converts the user terminal to the CELL_FACH state, and the user terminal reselects the cell operation. Quickly return to the long-term evolution community.
  • Step S201 The user terminal informs that the data volume of the data service on the network side is decreasing continuously; the user terminal can use the method of actively reporting the 4b event to inform the network side that the data volume of the data service is continuously decreasing.
  • Step S202 Receive resource block (RB, Resource Block) reconfiguration signaling sent by the network side, and reconfigure the resource block according to the reconfiguration signaling, so that the UE transits to the cell forward access channel state (that is, CELL_FACH status);
  • RB Resource Block
  • the cell forward access channel state that is, CELL_FACH status
  • Step S203 Perform measurement on the long-term evolved cell according to the information of the long-term evolved cell stored by the user terminal, and send the measurement result to the network side, complete the re-selection operation to the long-term evolved cell, and quickly return to the long-term evolved cell after completing the CSFB service.
  • the information of the long-term evolved cell stored by the user terminal is information of the long-term evolved cell where the user is located before using the CSFB technology.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides a method for returning a long-term network.
  • FIG. 3 For a flowchart of the method, refer to FIG. 3, including:
  • Step S301 After the CSFB voice service ends, the UE determines whether the measurement configuration of the LTE cell delivered by the network side is received, if yes, step S302 is performed; if not, step S313 is performed.
  • the measurement object in the measurement configuration is an LTE cell, and the measurement parameter is RSCP.
  • the preset condition for initiating the long-term evolution cell measurement is the triggering 2d event, and the threshold value of the 2d event is -96dbm,
  • Step S302 The UE is currently performing data services, such as streaming media, and is in the CELL_DCH state. In this state, the mobility management needs to be completed by the handover operation. After receiving the measurement configuration, the UE needs to determine whether the preset condition for initiating the measurement is met. Because the preset condition for initiating the measurement is a 2d event, and the triggering rule of the 2d event is that the measured value of the current serving cell is lower than the threshold, the current serving cell needs to be measured, and then the UE measures the current serving cell, and the measurement parameter After obtaining the measured value for the RSCP, step S304 is performed;
  • Step S303 determining whether the measured value of the current serving cell is lower than a threshold value of the 2d event, such as If yes, go to step S304, if not, go to step S305;
  • Step S304 The measurement value is sent to the network side, that is, the 2d event is reported to the network side, and then step S306 is performed;
  • Step S305 The measured value is modified to be lower than the threshold value of the 2d event, and then step S304 is performed.
  • step S304 the measured value sent to the network side is modified
  • step S306 The network side receives the current value.
  • the measurement value of the serving cell because the received measurement value is lower than the threshold value of the 2d event, the 2d event is triggered, and the measurement initiation rule is satisfied, and the network side sends a command for measuring the long-term evolution cell to the user terminal;
  • Step S307 The user terminal performs measurement on the long-term evolved cell to obtain a measured value of the long-term evolved cell.
  • Step S308 determining whether the measured value of the long-term evolution cell satisfies the 3a event, if yes, executing step S309, if not, performing step S310;
  • Step S309 The measured value of the long-term evolution cell is sent to the network side, that is, the 3a event is reported to the network side, and then step S311 is performed;
  • Step S310 Modify the measured value of the long-term evolution cell, so that the measured value is higher than the threshold of the 3a event, and then perform step S309.
  • step S309 the measured value sent to the network side is modified;
  • Step S311 After the network side knows that the 3a event has been triggered, the switching instruction is sent to the user terminal, and then step S312 is performed;
  • Step S312 After receiving the handover instruction, the user terminal switches the network and returns to the LTE network.
  • Step S313 The user terminal actively reports the 4b event to the network side, indicating that the data service data volume is continuously decreasing, and then executing step S314;
  • Step S314 The network side sends RB reconfiguration signaling, so that the user terminal transits to the CELL_FACH state.
  • Step S315 The user terminal performs measurement on the LTE cell by using the previously stored LTE cell information, obtains a measurement value, and then performs step S308.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the first determining module is configured to perform the voice service after the user terminal adopts the circuit switching fallback technology. And determining whether the communication quality of the current serving cell meets a preset condition for initiating long-term evolution cell measurement, and if yes, notifying the measurement module, if not, notifying the processing module; the measurement module is configured to perform measurement on the long-term evolution cell; and the processing module is configured to The detection result is processed such that the detection result of the communication quality of the current service 'j, the area meets the preset condition to initiate measurement of the long-term evolution cell; and the handover network module is configured to finally return to the long-term evolution cell according to the result of the long-term evolution cell measurement.
  • the switching network module further includes a determining sub-module and a processing sub-module; the determining sub-module is configured to determine whether the measurement result of the long-term evolved cell meets a preset condition for triggering the switching cell, and when not, notifying the processing sub-module, the processing sub-module is configured to be long-term The evolved cell measurement result is processed to satisfy the preset condition of triggering the handover cell.
  • the user terminal further includes a second determining module, a detecting module, a notifying module, and a reselecting module, where the second determining module is configured to determine whether the communication quality of the current serving cell satisfies the measurement of the long-term evolved cell.
  • the notification detection module detects that the detection module is configured to detect the communication quality of the current serving cell and obtain the detection result, and if not, notify
  • the notification module is configured to notify the network side user terminal that the data volume of the user service is decreasing, so that the network side converts the user terminal to the CELL_FACH state; and the reselection module is configured to reselect the cell to enable the user terminal to quickly return to the long term evolution cell.
  • the method and the terminal for returning a long term evolution cell provided by the embodiment of the present invention can solve the communication quality in the current serving cell when the QoS service is required to be returned to the LTE network after the CSFB technology is used for the voice service. In the better case, the problem of long-term evolution d and area cannot be returned.
  • the method provided by the present invention first determines whether the detection result of the communication quality of the current serving cell satisfies the preset condition for initiating the long-term evolution cell measurement.
  • the current The detection result of the communication quality of the serving cell satisfies a preset condition so that the user terminal can initiate measurement of the long-term evolved cell, and finally returns to the long-term evolved cell according to the result of the long-term evolution cell measurement.
  • the method of the present invention is used to process the detection result, and the detection result is forced to meet the preset condition, thereby triggering the long-term evolution cell.
  • the handover condition is generally satisfied, so that the user terminal performs network handover, and the user terminal returns to the long-term evolution network.
  • the method for returning to the long term evolution network does not require the UE to send the signaling connection release of the PS domain, so there is no need to interrupt the data service or wait for the end of the data service in the process of returning to the long term evolution network.

Abstract

本发明公开了一种返回长期演进小区的方法、终端，其中，本发明提供的方法首先判断当前服务小区的通信质量的检测结果是否满足发起长期演进小区测量的预设条件，当前服务小区的通信质量的检测结果不满足预设条件时，通过对检测结果进行处理使得当前服务小区的通信质量的检测结果满足预设条件从而使用户终端可以发起对长期演进小区的测量，并根据长期演进小区测量的结果最终返回到长期演进小区。

Description

一种返回长期演进小区的方法、 终端 技术领域
本发明涉及移动通信技术， 尤其涉及一种返回长期演进小区的方法、 终端。 背景技术
长期演进（LTE, Long Term Evolution)和电路域（CS, Circuit Switched ) 双模终端的无线模块是单一无线模式， 即具有 LTE和 UMTS陆地无线接入网 ( UTRAN, UMTS Terrestrial Radio Access Network ) /GERAN ( GSM EDGE Radio Access Network )接入能力的双模或者多模终端， 在使用 LTE接入时， 无法收 /发电路域业务信号。 为了使得终端在 LTE接入下能够发起话音业务 等 CS业务， 以及接收到话音等 CS业务的寻呼， 并且能够对终端在 LTE网络 中正在进行的分组交换（PS, Packet Switch )业务进行正确地处理， 产生了 电路域回落（ CSFB , Circuit Switched Fallback )技术。 其中电路域的核心网 络主要包含移动交互中心 （ MSC , Mobile Switching Center )。 为了在 E-UTRAN网络中向用户终端（UE, User Equipment)提供电路语音业务， 在 移动管理实体（ MME , Mobility Management Entity )与移动交换中心（ MSC , Mobile Switching Center )之间引入了 SGs接口。 在该架构下， UE首先在 E-UTRAN网络发起 EPS移动性管理（ EMM, EPS Mobility Management )联 合流程。 通过该联合流程， MME与 MSC为 UE创建 SGs关联。 当 UE准备发起 CS主叫业务时， UE需要先回落到电路域， 然后再开展主叫业务。 当 MSC收 到一个 CS被叫业务时， MSC通过 SGs接口向 MME发送寻呼消息， MME通过 E-UTRAN网络对 UE进行寻呼 , UE接收到该寻呼消息后 , 需要先回落到电 路域， 然后再完成该被叫业务的后续处理。 上述的架构及主叫、 被叫业务 的处理方法可以称为 CSFB。
以 网 络为通用 移动通信 系 统 （ UMTS , Universal Mobile Telecommunications System ) 为例， UE为了处理语音呼叫业务回落到 3G网 络， 当语音呼叫结束后，如何返回到 LTE网络成为一个课题。在现实布网中， LTE网络的速度比 3G\2G网络快， 在语音呼叫结束后， 理应返回到 4G网络以 使用户能够享受更高速的数据业务服务。
现有的技术一般都是等 UE处于 IDLE MODE时， 通过小区重选操作或 UE由 Connected态转换到 IDLE态时，通过 RRC ConnectionRelease消息重定向 到 LTE小区。 当 UE处于 Connected态时， 这种做法通常是失效的， 也就是只 有当 UE在 3G小区中完成数据业务后， 才有可能返回到 LTE网络。
高通针对这种情况， 提出了一种解决办法： 当 CSFB语音业务结束时， 如果有 PS业务进行， 强行使 UE发送 PS域的信令连接释放 ( Signalling Connection Release ) ,让 UE返回到 IDLE态， 完成到 LTE小区的重选操作。 这 种实现方案过于强硬， 使得数据业务中断， 关键绩效指标（call drop KPI, Key Performance Indicator )上升， 类似无线链路失败（RLF, Radio Link Failure ) 场景。
另一种方法可以使用户终端在不中断数据业务的情况下返回到 LTE小 区， 具体为： 当用户终端检测到当前服务小区的通信质量不好时， 触发对 邻近小区的测量， 如果邻近小区的通信质量优于当前服务小区， 则网络侧 会下发切换指令给用户终端， 让终端返回到通信质量较好的小区。 这种方 法的缺点是必须要在当前服务小区的通信质量差且邻近小区的通信质量达 到一定要求的情况下才会触发切换操作 , 因此在当前服务 d、区的通信质量 较好的情况下不能返回到 LTE小区。 发明内容
有鉴于此， 提供一种返回长期演进小区的方法、 终端， 解决在使用了 CSFB技术进行语音业务后需要返回 LTE网络时， 在不中断数据业务的情况 下， 只有在当前服务小区的通信质量不好时才能完成返回长期演进小区的 问题。
本发明实施例提供了一种返回长期演进小区的方法， 在用户终端采用 电路交换回落技术进行语音业务结束之后还包括： 判断当前服务小区的通 信质量的检测结果是否满足发起长期演进小区测量的预设条件， 若否， 则 对检测结果进行处理使得当前服务小区的通信质量的检测结果满足预设条 件发起对长期演进小区的测量； 根据对长期演进小区测量的结果返回到长 期演进小区。
在本发明的一种实施例中， 预设条件包括： 触发 2d事件。
在本发明的一种实施例中， 当前服务'』、区的通信质量的检测结果包括： 对当前服务小区的通信质量对应的参数进行测量获取的当前服务小区的测 量值； 发起长期演进小区测量的预设条件包括： 当前服务小区的测量值在 触发 2d事件的预设范围内； 对检测结果进行处理包括： 对当前服务小区的 测量值进行修改使其在触发 2d事件的预设范围内。
在本发明的一种实施例中， 根据长期演进小区测量的结果最终返回到 长期演进小区的步骤包括： 判断长期演进小区的测量结果是否满足触发切 换小区的预设条件， 当否时， 对长期演进小区测量结果进行处理使其满足 触发切换小区的预设条件。
在本发明的一种实施例中， 触发切换小区的预设条件包括： 触发 3a、 3d事件中的至少一个。
在本发明的一种实施例中， 对长期演进小区测量的过程包括： 对长期 演进小区通信质量对应的参数进行测量； 触发切换小区的预设条件包括： 长期演进小区通信质量对应的参数的测量值在触发 3a和 /或 3d事件的预设范 围内； 对长期演进小区测量结果进行处理包括： 对长期演进小区的测量值 进行修改使其在触发 3a和 /或 3d事件的预设范围内。
在本发明的一种实施例中， 在判断当前服务小区的通信质量的检测结 果是否满足发起长期演进小区测量的预设条件之前还包括： 判断是否接收 到网络侧发送的长期演进小区的检测信令， 若是， 则检测当前服务小区的 通信质量， 若否， 则通知网络侧用户终端的数据业务的数据量在不断减少， 使网络侧将用户终端转换到小区向前接入信道状态 （也即 CELL_FACH状 态）， 用户终端通过重选小区操作快速返回长期演进小区。
在本发明的一种实施例中， 用户终端通过向网络侧上报 4b事件的方式 通知网络侧用户终端的数据业务的数据量在不断减少。
本发明实施例还提供了一种用户终端， 包括第一判断模块、 测量模块、 处理模块、 切换网络模块； 其中，
第一判断模块， 配置为在用户终端采用电路交换回落技术进行语音业 务结束之后 , 判断当前服务小区的通信质量是否满足发起长期演进小区测 量的预设条件， 若是， 则通知测量模块， 若否， 则通知处理模块；
测量模块， 配置为对长期演进小区进行测量；
处理模块， 配置为对检测结果进行处理使得当前服务 ' j、区的通信质量 的检测结果满足预设条件从而发起对长期演进小区的测量；
切换网络模块， 配置为根据长期演进小区测量的结果最终返回到长期 演进小区。
在本发明的一种实施例中， 切换网络模块还包括判断子模块、 处理子 模块； 其中，
判断子模块 , 配置为判断长期演进小区的测量结果是否满足触发切换 小区的预设条件， 当否时， 通知处理子模块；
处理子模块， 配置为对长期演进小区测量结果进行处理使其满足触发 切换小区的预设条件。 在本发明的一种实施例中， 用户终端还包括第二判断模块、 检测模块、 通知模块、 重选模块； 其中，
第二判断模块， 配置为判断当前服务 ' j、区的通信质量是否满足发起长 期演进小区测量的预设条件之前， 判断是否接收到网络侧发送的长期演进 小区的检测信令， 若是， 则通知检测模块检测；
检测模块， 配置为检测当前服务小区的通信质量并获得检测结果， 若 否， 则通知所述通知模块；
通知模块， 配置为通知网络侧用户终端的数据业务的数据量在不断减 少， 使网络侧将用户终端转换到小区向前接入信道状态（也即 CELL_FACH 状态 )；
重选模块， 配置为重选小区使用户终端快速返回长期演进小区。
所述第一判断模块、 所述测量模块、 所述处理模块、 所述切换网络模 块、 所述判断子模块、 所述处理子模块、 所述第二判断模块、 所述检测模 块、 所述通知模块、 所述重选模块在执行处理时， 可以采用中央处理器 ( CPU, Central Processing Unit ), 数字信号处理器（DSP, Digital Singnal
Processor )或可编程還辑 P车列 （FPGA, Field - Programmable Gate Array ) 实现。
本发明实施例的有益效果是：
本发明实施例提供的一种返回长期演进小区的方法、 终端， 能解决在 使用了 CSFB技术进行语音业务后需要返回 LTE网络时， 在不中断数据业务 的情况下， 在当前服务小区的通信质量较好的情况下不能返回长期演进 d、 区的问题。 本发明提供的方法首先判断当前服务小区的通信质量的检测结 果是否满足发起长期演进小区测量的预设条件， 当当前服务小区的通信质 量不满足预设条件时， 通过对检测结果进行处理使得当前服务小区的通信 质量的检测结果满足预设条件从而使用户终端可以发起对长期演进小区的 测量， 并根据长期演进小区测量的结果最终返回到长期演进小区。 首先， 当当前服务小区的通信质量较好， 其检测结果不满足预设条件时， 采用本 发明的方法， 对检测结果进行处理， 强行使检测结果满足预设条件， 从而 触发对长期演进小区的测量， 因为长期演进小区的性能一般都优于当前服 务小区， 所以一般都会满足切换条件， 从而让用户终端进行网络切换， 使 用户终端返回到长期演进网络。 其次， 这种返回长期演进网络的方法， 不 需要 UE发送 PS域的信令连接释放， 因此在返回长期演进网络的过程中不需 要中断数据业务或等待数据业务结束。 附图说明
图 1为本发明实施例一提供的返回长期演进小区的方法的流程示意图； 图 2为本发明实施例一提供的当用户终端没有接收到网络侧发送的长 期演进小区的检测信令时返回长期演进小区的方法的流程示意图；
图 3为本发明实施例二提供的返回长期演进小区的方法的流程示意图； 图 4为本发明实施例三提供的用户终端的结构示意图。 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：
UE在 LTE网络进行业务数据， 此时主叫或被叫， 通过 CSFB技术进行回 落到 2G或 3G网络进行语音业务。 这里以回落到 UMTS网络为例对本发明进 行说明。 在语音业务结束之后， UE的当前服务小区是 UMTS小区， 也就是 说 UE与 UMTS网络连接，还没有返回到 LTE网络中。此时仍然有数据业务正 在进行， 导致 UE处于 RRC Connected状态。 在背景技术中已经说明： 在 UE 处于 RRC Connected时， 不能通过小 区重选操作或通过 RRC ConnectionRelease消息重定向到 LTE小区。 如果一定要返回到 LTE小区， 就 必须强行使 UE发送 PS域的信令连接释放 ( Signalling Connection Release ) , 让 UE返回到 IDLE态， 完成到 LTE小区的重选操作。
本实施例提供的返回长期网络的方法的主要流程请参见图 1 , 包括： 步骤 S 101： 判断当前服务 ' j、区的通信质量的检测结果是否满足发起长 期演进小区测量的预设条件， 如果不满足， 就执行步骤 S102; 如果满足， 则执行步骤 S 103;
反应当前服务小区的通信质量的值通常有接收信号码功率 （ RSCP, Received Signal Code Power ), Ec/No、 参考信号接收功率（ RSRP )、 参考信 号接收质量（RSRQ )等；
预设条件可以设置为当前服务小区的通信质量的测量值低于一定值， 例如 2d事件。 2d事件是异频切换中常见的事件之一， 2d事件是为了启动切 换进行准备的， 即发现当前频点质量差， 从而启动对其他频点的测量。 要 确定是否满足 2d事件 , 需要对当前服务小区进行测量获得当前服务小区的 测量值， 还需要或者 2d事件的门限值， 如果当前服务小区的测量值低于 2d 事件的门限值， 则触发 2d事件， 而此时当前服务小区的测量值就在触发 2d 事件的预设范围内。
步骤 S102: 对检测结果进行处理使得当前服务小区的通信质量的检测 结果满足预设条件从而发起对长期演进小区的测量；
以预设条件为 2d事件为例， 2d事件门限值为： -96dbm, 也即当当前服 务小区的测量值小于等于 -96dbm时， 触发 2d事件， 满足测量启动规则。 例 如 UE对 UMTS网络实际测量值为 -80dbm, 通过对测量值进行修改， 例如给 测量值加上 -17dbm, 使其小于 -96dbm, 这样 UE就能够进行 2d事件的上报， 告知网络侧其满足了测量启动规则 , 之后就可以对测量对象进行测量。
步骤 S103: 对长期演进小区进行测量， 获得长期演进小区的测量值； 步骤 S104: 才艮据长期演进小区测量的结果最终返回到长期演进小区。 获得测量值之后， 判断长期演进小区的测量结果是否满足触发切换小 区的预设条件，切换小区指从当前服务小区切换到 LTE小区。 因为长期演进 小区的性能一般都优于当前服务小区 , 所以一般都会满足预设的切换条件， 从而让用户终端进行网络切换， 使用户终端返回到长期演进小区。
为保证能够切换到长期演进小区， 在不满足触发切换小区的预设条件 下， 对长期演进小区测量结果进行处理使其满足触发切换小区的预设条件。 一般触发切换小区的预设条件可以是触发 3a、 3d事件中的至少一个。 3a事件 为： 当前 3G小区的信号质量低于一个门限而异系统小区的信号质量高于一 个门限。 3d事件为： 最好的小区发生了变化， 异系统小区的信号质量是最 好的。当长期演进小区的测量值高于 3a事件的门限或 UMTS小区的测量值低 于 3d事件的门限时， 就可以触发 3a事件或 3d事件。 当预设条件是 3a和 /或 3d 事件时， 对长期演进小区测量的过程包括： 对长期演进小区通信质量对应 的参数进行测量； 所述触发切换小区的预设条件包括： 长期演进小区通信 质量对应的参数的测量值在触发 3a和 /或 3d事件的预设范围内； 对长期演进 小区测量结果进行处理包括： 对所述长期演进小区的测量值进行修改使其 在触发 3a和 /或 3d事件的预设范围内。 以 3a事件为例， 3a事件门限值为： 96dbm, 也即当长期演进小区的测量值大于或等于 96dbm时， 触发 3a事件。 例如 UE对 LTE网络实际测量值为 80dbm,通过对测量值进行修改，例如给测 量值加上 17dbm, 使其大于 96dbm, 这样就能触发 3a事件。
在上述步骤 S101之前， 还包括： 判断用户终端是否接收到网络侧发送 的长期演进小区的检测信令（检测信令为网络侧通知用户终端对长期演进 网络进行检测所发送的信息， 包括检测配置、 测量配置等），若是， 则执行 步骤 S101 , 若否， 则通知网络侧用户终端的数据业务的数据量在不断减少， 使网络侧将用户终端转换到 CELL_FACH状态， 用户终端通过重选小区操作 快速返回长期演进小区。 具体步骤如图 2所示， 包括： 步骤 S201: 用户终端告知网络侧数据业务的数据量在不断减少； 用户终端可采用主动上报 4b事件这种方式告知网络侧数据业务的数据 量在不断减少。
步骤 S202: 接收网络侧下发的资源块（RB, Resource Block )重配置信 令， 并根据该重配置信令对资源块进行重配置， 使 UE转换到小区向前接入 信道状态 （也即 CELL_FACH状态）；
步骤 S203: 根据用户终端存储的长期演进小区的信息对长期演进小区 进行测量， 并将测量结果发送给网络侧， 完成到长期演进小区的重选操作， 完成 CSFB业务结束后快速返回长期演进小区的目的。 用户终端存储的长期 演进小区的信息是用户在使用 CSFB技术之前所处的长期演进小区的信息。
实施例二：
本实施例提供了一种返回长期网络的方法， 该方法的流程图请参见图 3, 包括：
步骤 S301: UE在 CSFB语音业务结束之后，判断是否接收到网络侧下发 的 LTE小区的测量配置， 如果接收到， 则执行步骤 S302; 如果没有接收到， 则执行步骤 S313。 测量配置中的测量对象为 LTE小区， 测量参数为 RSCP, 发起长期演进小区测量的预设条件为触发 2d事件， 2d事件的门限值为 -96dbm,；
步骤 S302: UE当前正在进行数据业务， 例如流媒体等功能， 处于 CELL_DCH状态， 该状态下移动性管理需要通过切换操作完成； UE接收到 测量配置后， 需要判断是否满足发起测量的预设条件， 因为发起测量的预 设条件是 2d事件， 而 2d事件的触发规则是当前服务小区的测量值低于门限 值， 所以需要对当前服务小区进行测量， 于是 UE对当前服务小区进行测量， 测量参数为 RSCP, 获得测量值之后， 执行步骤 S304;
步骤 S303: 判断当前服务小区的测量值是否低于 2d事件的门限值， 如 果满足， 则执行步骤 S304, 如果不满足， 则执行步骤 S305;
步骤 S304: 将测量值发送给网络侧， 也即向网络侧进行 2d事件的上报， 然后执行步骤 S306;
步骤 S305: 对测量值进行修改， 使其低于 2d事件的门限值， 然后执行 步骤 S304, 在步骤 S304中， 发送给网络侧的是经过修改之后的测量值； 步骤 S306: 网络侧接收当前服务小区的测量值， 因为接收到的测量值 是低于 2d事件的门限值的， 所以触发了 2d事件， 满足测量启动规则， 网络 侧向用户终端下发测量长期演进小区的命令；
步骤 S307: 用户终端对长期演进小区进行测量， 获得长期演进小区的 测量值；
步骤 S308: 判断长期演进小区的测量值是否满足 3a事件， 如果满足， 执行步骤 S309, 如果不满足， 执行步骤 S310;
步骤 S309: 将长期演进小区的测量值发送给网络侧， 即向网络侧上报 3a事件， 然后执行步骤 S311 ;
步骤 S310: 修改长期演进小区的测量值， 使其测量值高于 3a事件的门 限值， 然后执行步骤 S309, 在步骤 S309中， 发送给网络侧的是经过修改之 后的测量值；
步骤 S311 : 网络侧在得知 3a事件已经触发之后， 向用户终端下发切换 指令， 然后执行步骤 S312;
步骤 S312: 用户终端接收到切换指令之后， 切换网络， 返回到 LTE网络 中；
步骤 S313: 用户终端向网络侧主动上报 4b事件， 表示数据业务数据量 在不断减少， 然后执行步骤 S314;
步骤 S314: 网络侧下发 RB重配置信令，使用户终端转换到 CELL_FACH 状态； 步骤 S315: 用户终端通过之前存储的 LTE小区信息， 对 LTE小区进行测 量， 获得测量值， 然后执行步骤 S308。
实施例三：
本实施例提供了一种用户终端， 请参考图 4, 包括第一判断模块、 测量 模块、 处理模块、 切换网络模块； 第一判断模块配置为在用户终端采用电 路交换回落技术进行语音业务结束之后， 判断当前服务小区的通信质量是 否满足发起长期演进小区测量的预设条件， 若是， 则通知测量模块， 若否， 则通知处理模块； 测量模块配置为对长期演进小区进行测量； 处理模块配 置为对检测结果进行处理使得当前服务 ' j、区的通信质量的检测结果满足预 设条件从而发起对长期演进小区的测量； 切换网络模块配置为根据长期演 进小区测量的结果最终返回到长期演进小区。
切换网络模块还包括判断子模块、 处理子模块； 判断子模块配置为判 断长期演进小区的测量结果是否满足触发切换小区的预设条件， 当否时， 通知处理子模块， 处理子模块配置为对长期演进小区测量结果进行处理使 其满足触发切换小区的预设条件。
在本发明的一种实施例中， 用户终端还包括第二判断模块、 检测模块、 通知模块、 重选模块， 第二判断模块配置为判断当前服务小区的通信质量 是否满足发起长期演进小区测量的预设条件之前， 判断是否接收到网络侧 发送的长期演进小区的检测信令， 若是， 则通知检测模块检测， 检测模块 配置为检测当前服务小区的通信质量并获得检测结果， 若否， 则通知通知 模块， 通知模块配置为通知网络侧用户终端的数据业务的数据量在不断减 少， 使网络侧将用户终端转换到 CELL_FACH状态； 重选模块配置为重选小 区使用户终端快速返回长期演进小区。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。 工业实用性
本发明实施例提供的一种返回长期演进小区的方法、 终端， 能解决在 使用了 CSFB技术进行语音业务后需要返回 LTE网络时， 在不中断数据业务 的情况下， 在当前服务小区的通信质量较好的情况下不能返回长期演进 d、 区的问题。 本发明提供的方法首先判断当前服务小区的通信质量的检测结 果是否满足发起长期演进小区测量的预设条件， 当当前服务小区的通信质 量不满足预设条件时， 通过对检测结果进行处理使得当前服务小区的通信 质量的检测结果满足预设条件从而使用户终端可以发起对长期演进小区的 测量， 并才艮据长期演进小区测量的结果最终返回到长期演进小区。 首先， 当当前服务小区的通信质量较好， 其检测结果不满足预设条件时， 采用本 发明的方法， 对检测结果进行处理， 强行使检测结果满足预设条件， 从而 触发对长期演进小区的测量， 因为长期演进小区的性能一般都优于当前服 务小区， 所以一般都会满足切换条件， 从而让用户终端进行网络切换， 使 用户终端返回到长期演进网络。 其次， 这种返回长期演进网络的方法， 不 需要 UE发送 PS域的信令连接释放， 因此在返回长期演进网络的过程中不需 要中断数据业务或等待数据业务结束。

Claims

权利要求书
1、 一种返回长期演进小区的方法， 所述方法包括： 在用户终端采用电 路交换回落技术进行语音业务结束之后 ,
判断当前服务小区的通信质量的检测结果是否满足发起长期演进小区 测量的预设条件， 若否， 则对检测结果进行处理使得当前服务小区的通信 质量的检测结果满足所述预设条件发起对长期演进小区的测量；
根据对所述长期演进小区测量的结果返回到所述长期演进小区。
2、 如权利要求 1所述的返回长期演进小区的方法， 其中， 所述预设条 件包括： 触发 2d事件。
3、 如权利要求 2所述的返回长期演进小区的方法， 其中， 所述当前服 务小区的通信质量的检测结果包括： 对当前服务 ' j、区的通信质量对应的参 数进行测量获取的当前服务小区的测量值；
所述发起长期演进小区测量的预设条件包括： 所述当前服务小区的测 量值在触发 2d事件的预设范围内；
对检测结果进行处理包括： 对所述当前服务小区的测量值进行修改使 其在触发 2d事件的预设范围内。
4、 如权利要求 1所述的返回长期演进小区的方法， 其中， 所述根据长 期演进小区测量的结果最终返回到长期演进小区包括：
判断长期演进小区的测量结果是否满足触发切换小区的预设条件， 当 否时， 对长期演进小区测量结果进行处理使其满足触发切换小区的预设条 件。
5、 如权利要求 4所述的返回长期演进小区的方法， 其中， 所述触发切 换小区的预设条件包括： 触发 3a、 3d事件中的至少一个。
6、 如权利要求 5所述的返回长期演进小区的方法， 其中， 对长期演进 小区测量的过程包括： 对长期演进小区通信质量对应的参数进行测量； 所 述触发切换小区的预设条件包括： 长期演进小区通信质量对应的参数的测 量值在触发 3a和 /或 3d事件的预设范围内； 对长期演进小区测量结果进行处 理包括： 对所述长期演进小区的测量值进行修改使其在触发 3a和 /或 3d事件 的预设范围内。
7、如权利要求 1-6任一项所述的返回长期演进小区的方法， 其中， 在判 断当前服务 ' j、区的通信质量的检测结果是否满足发起长期演进' j、区测量的 预设条件之前还包括： 判断是否接收到网络侧发送的长期演进小区的检测 信令， 若是， 则检测当前服务小区的通信质量， 若否， 则通知网络侧用户 终端的数据业务的数据量在不断减少 , 使网络侧将用户终端转换到小区前 向接入信道状态， 用户终端通过重选小区操作快速返回长期演进小区。
8、 如权利要求 7所述的返回长期演进小区的方法， 其中， 所述用户终 端通过向网络侧上艮 4b事件的方式通知所述网络侧用户终端的数据业务的 数据量在不断减少。
9、 一种用户终端， 包括第一判断模块、 测量模块、 处理模块、 切换网 络模块； 其中，
所述第一判断模块， 配置为在用户终端采用电路交换回落技术进行语 音业务结束之后 , 判断当前服务小区的通信质量是否满足发起长期演进小 区测量的预设条件， 若是， 则通知所述测量模块， 若否， 则通知所述处理 模块；
所述测量模块， 配置为对长期演进小区进行测量；
所述处理模块， 配置为对检测结果进行处理使得当前服务小区的通信 质量的检测结果满足预设条件从而发起对长期演进小区的测量；
所述切换网络模块， 配置为根据长期演进小区测量的结果最终返回到 长期演进小区。
10、 如权利要求 9所述的用户终端， 其中， 所述切换网络模块还包括判 断子模块、 处理子模块； 其中，
所述判断子模块， 配置为判断长期演进小区的测量结果是否满足触发 切换小区的预设条件， 当否时， 通知处理子模块；
所述处理子模块， 配置为对长期演进小区测量结果进行处理使其满足 触发切换小区的预设条件。
11、 如权利要求 9或 10所述的用户终端， 其中， 所述用户终端还包括第 二判断模块、 检测模块、 通知模块、 重选模块； 其中，
所述第二判断模块， 配置为判断当前服务 d、区的通信质量是否满足发 起长期演进小区测量的预设条件之前， 判断是否接收到网络侧发送的长期 演进小区的检测信令， 若是， 则通知检测模块检测；
所述检测模块， 配置为检测当前服务 ' j、区的通信质量并获得检测结果， 若否， 则通知所述通知模块；
所述通知模块， 配置为通知网络侧用户终端的数据业务的数据量在不 断减少， 使网络侧将用户终端转换到小区向前接入信道状态；
所述重选模块， 配置为重选小区使用户终端快速返回长期演进小区。
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