CN101835221B - Subdistrict switching method and base station - Google Patents

Subdistrict switching method and base station Download PDF

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CN101835221B
CN101835221B CN 201010158253 CN201010158253A CN101835221B CN 101835221 B CN101835221 B CN 101835221B CN 201010158253 CN201010158253 CN 201010158253 CN 201010158253 A CN201010158253 A CN 201010158253A CN 101835221 B CN101835221 B CN 101835221B
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cell
handover
handover preparation
preparation
ue
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CN101835221A (en
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杨刚
段艳华
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新邮通信设备有限公司
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Abstract

The invention discloses a subdistrict switching method which comprises the following steps of: adding a switching preparation timer into a source eNB (evolved Node B), starting the switching preparation timer after sending out a switching request message, judging whether a switching preparation subdistrict sending the message is the optimum switching preparation subdistrict when the source eNB receives a switching request ACK (ACKnowledge Character) message every time before the timer is overtime, if so, using the preparation subdistrict as a switching target subdistrict to issue a switching command to a UE (User Equipment) by the source eNB without waiting for receiving other switching request ACK messages any more, and if the optimum switching preparation subdistrict is still not selected until the timer is overtime, selecting the switching target subdistrict from the preparation subdistrict corresponding to all the received switching request ACK messages to issue the switching command to the UE. The invention also discloses an eNB. The UE can be accurately and rapidly switched to the subdistrict with good signal quality by adopting the subdistrict switching method and the eNB.

Description

一种小区切换方法和基站 A cell handover method and a base station

技术领域 FIELD

[0001] 本发明涉及移动通信技术领域,特别是涉及一种小区切换方法和基站(eNB)。 [0001] The present invention relates to the technical field of mobile communications, particularly to a cell handover method and a base station (eNB). 背景技术 Background technique

[0002] 在移动通信系统中,当处于连接状态的用户设备(UE)在地理位置上从一个小区移动到另外一个小区,或者当前服务小区的链路质量恶化,为了保证通信的连续性,网络需要将UE从当前的服务小区切换到另外一个小区,由另外一个小区为该UE继续提供服务 [0002] In a mobile communication system, when a user equipment (UE) in a connected state moves from one cell to another location in the cell, or serving cell current link quality deteriorates, in order to ensure uninterrupted communication network UE needs to be switched from the current serving cell to another cell, continue to provide services for the UE by another cell

[0003] UE的小区切换过程采用网络控制、UE辅助的切换方式。 [0003] UE using a cell handover process control network, UE-assisted switching mode. 为了提高切换成功率,时分的长期演进(TD-LTE)系统中引入了eNB准备集的概念。 In order to improve handover success rate, long-term evolution time division (TD-LTE) system, introduced the concept of eNB ready sets. 在切换准备阶段,UE服务小区向多个切换准备小区发起切换请求,由成功接纳UE的切换准备小区所属的eNB构成的集合称为eNB准备集,eNB准备集中的eNB有UE相关信息,UE可以快速地接入。 In the handover preparation phase, UE handover to the serving cell to prepare a plurality of cells to initiate a handover request, by the successful collection eNB belongs to a UE receiving handover preparation is referred to as a cell set prepared eNB, the eNB concentrated prepared eNB UE-related information, UE can quick access.

[0004] UE的当前服务小区为源小区,源小区所属的eNB为源eNB。 [0004] UE in the current serving cell to the source cell, eNB source cell belongs as a source eNB. 源eNB控制并评估UE 测量上报和eNB的测量结果,并考虑UE的区域限制情况,判定是否发起切换控制,做出切换决策。 Control and evaluate the source eNB and UE measurement reports the measurement result of the eNB and the UE consider the case where the area limiting, control determines whether to initiate a handover, makes a handover decision. 切换决策中包括一个或多个切换准备小区,切换准备小区所属的eNB为切换准备eNB,也称为准备eNB。 Handover decision comprises one or more cell handover preparation, handover preparation eNB handover preparation for the cell eNB belongs, also known prepared eNB. 做出切换决策后,源eNB向一个或多个准备eNB发送切换请求消息。 After making the handover decision, the source eNB to one or more prepared eNB sends a handover request message. 准备eNB做出接纳控制,只要该切换UE的一个系统架构演进(SAE)承载被准备eNB的切换准备小区接纳,即认为此UE已被准备eNB的切换准备小区接纳成功,准备eNB向源eNB发送接纳成功的切换请求响应(ACK)消息,源eNB根据接收到的准备eNB的切换请求ACK消息的切换准备小区中选择UE切换到的小区,将其称为切换目标小区,也称为目标小区。 Prepared eNB make admission control, a system architecture evolution long as the handover of the UE (SAE) bearer is prepared eNB cell receiving the handover preparation, i.e. that this UE has been prepared eNB cell receiving the handover preparation is successful, the source eNB sends a ready eNB receiving a successful handover request acknowledgment (ACK) message, the source eNB handover request based on the received provisioning eNB handover preparation ACK message selected cell UE to the cell, referred to as handover target cell, also referred to as target cells. 源eNB向UE发送切换重配置消息通知UE切换到目标小区,UE开始切换到目标小区。 The source eNB transmits to the UE a reconfiguration message informs the UE handover to a target cell, UE starts handover to the target cell. 如果准备eNB下的切换准备小区都不能接纳UE的任何SAE承载,则准备eNB向源eNB回复接纳失败的切换请求ACK消息。 If the cell under handover preparation prepared eNB can not receive any of the SAE bearers of the UE is ready to receive a reply to the source eNB eNB handover request ACK message failed. 如果一个eNB下属同时包含源小区和切换准备小区,则这个eNB 同时担任源eNB和准备eNB。 If eNB to a cell contains a source cell and a handover preparation, the same time as the source eNB and prepared eNB eNB.

[0005] TD-LTE系统中,UE小区切换方式可以分为三类,即:同eNB切换,基于X2应用协议(AP)切换和基于SlAP切换。 [0005] TD-LTE system, the UE cell switching mode can be divided into three categories, namely: the same eNB handover, handover and switching based on SlAP X2 Application Protocol (AP). 源小区和目标小区同属一个eNB内的切换为同eNB切换;源小区和目标小区不属同一个eNB,但是存在X2AP连接且同属一个移动性管理实体(MME)和服务网关(SGW),则该切换为基于X2AP切换;源小区和目标小区不符合上述两种连接架构的切换为基于SlAP切换。 The source cell and the target cell belong to the same switch in the eNB is the same eNB handover; source cell and the target cell does not belong to the same eNB, but there X2AP connected and belong to a mobility management entity (MME) and a serving gateway (SGW), the X2AP handover based on the handover; the source cell and the target cell does not meet the above two switches connect architecture based SlAP handover. 一个切换流程可能涉及上述一种或多种切换方式。 A handover procedure may involve one or more of the above-described switching mode.

[0006] 目前的小区切换方法中,在LTE系统中,源eNB根据UE测量上报向多个准备eNB 发送切换请求消息,因此源eNB可能会接收到多个切换准备eNB发送的切换请求ACK消息。 [0006] Current methods of cell handover in the LTE system, according to the UE the source eNB reports the measurement preparation eNB sends a handover request message to a plurality of, the source eNB may receive the plurality of switching handover preparation request ACK message transmitted by the eNB. 不同切换准备eNB向源eNB发送的切换请求ACK消息不会同时到达源eNB。 Different handover preparation eNB transmits the handover request ACK message to the source eNB do not arrive simultaneously at the source eNB. 针对不同切换准备eNB向源eNB发送的切换请求ACK消息不同时的问题,现有的小区切换方法中存在两种处理方式,即:源eNB在接收到第一个切换请求ACK消息就向UE发送切换命令,或者,源eNB等到接收到所有切换准备小区的切换请求ACK消息后向UE发送切换命令。 Prepared eNB transmits to the handover source eNB different handover request ACK message is not the same problem, the conventional cell switching method in the presence of the two treatments, namely: the source eNB receives the first message transmits a handover request ACK to the UE handover command, or until the source eNB receives the handover preparation for all cell after handover request ACK to the UE sends a handover command message.

[0007] 如果源eNB接收到第一个切换请求ACK消息就向UE发送切换命令,那么如果待切换的UE包含保证比特率(GBR)承载的业务,有可能源eNB第一个接收到的切换请求ACK消息的准备eNB的切换准备小区只接纳了UE的非GBR承载而发出了接纳成功的切换请求ACK 消息,源eNB在接收到该切换请求ACK消息即把UE切换到该eNB,但是由于该目标小区接纳的只是非GBR承载,因此UE即使切换成功也无法继续切换前的GBR承载业务,造成业务中断。 [0007] If the source eNB receives the first message to a handover request ACK to the UE a handover command, then if the UE to be handed over comprises guaranteed bit rate (GBR) bearer traffic, the source eNB may have a first received handover request ACK message prepared eNB handover preparation cell to accept only the non-GBR bearers of the UE and sent receiving a successful handover request ACK message, the source eNB upon receiving the handover request ACK message i.e. the UE to the eNB, but since this target cell to accept only non-GBR bearers, even if the UE switches GBR bearer service before success can not continue to switch, causing service interruption. 并且,因为在切换过程中源eNB内的切换准备小区回应切换请求ACK消息比通过SlAP 切换和X2AP切换回应的切换请求ACK消息更早到达源小区,因此当存在同eNB切换的情况下,源eNB收到的第一个切换请求ACK消息通常来自其自身下属的切换准备小区,因此有可能源eNB接收到的第一个切换请求ACK消息来自UE测量上报中信号质量最差或较差的切换准备小区,以致UE在切换后信号质量仍然较差。 Further, since the handover preparation through the cell in the switching of Source eNB handover request response message ACK response than the switching by the switching SlAP X2AP handover request ACK message and the source cell arrives earlier, so when the presence of the same eNB handover, the source eNB the first handover request ACK messages are usually received from its own cell under handover preparation, so there may be a first source eNB receives the handover request message from the UE ACK signal quality measurement report in the worst or poorer handover preparation cell, so that the signal quality is still poor in the UE after the handover.

[0008] 如果源eNB等到接收到所有的切换准备小区的切换请求ACK消息后再从切换准备小区中选择出切换目标小区,可能最优切换准备小区的切换请求ACK最先到达,会导致源eNB的切换准备时间过长,则UE可能会因为信号质量问题导致业务中断。 [0008] If the source eNB receives the handover until the handover preparation for all cell ACK request from a handover preparation message and then choose handover target cell in the cell, the cell may be optimal switching the handover preparation request ACK arrives first, will cause the source eNB the handover preparation time is too long, then the UE may be because the signal quality problems result in service interruption.

[0009] 总之,采用现有的小区切换方法,无法准确快速地将UE切换到信号质量好的小区。 [0009] In summary, the use of existing cell handover method can not be quickly and accurately to handover the UE to the cell signal of good quality.

发明内容 SUMMARY

[0010] 本发明提供了一种小区切换方法,使用该方法能够准确快速地将UE切换到信号质量好的小区。 [0010] The present invention provides a cell handover method, this method can accurately and quickly to handover the UE to the cell signal of good quality.

[0011 ] 本发明还提供了一种eNB,该eNB能够准确快速地将UE切换到信号质量好的小区。 [0011] The present invention further provides an eNB, the eNB can quickly and accurately to handover the UE to the cell signal of good quality.

[0012] 为达到上述目的,本发明的技术方案是这样实现的: [0012] To achieve the above object, the technical solution of the present invention is implemented as follows:

[0013] 本发明公开了一种小区切换方法,该方法包括: [0013] The present invention discloses a cell switching, the method comprising:

[0014] A、源基站eNB接收用户设备UE的测量上报,根据UE的测量上报和源eNB的配置信息做出切换决策,确定切换准备小区列表; [0014] A, the source base station eNB receives a measurement report of the UE user equipment, according to the measurement reports of the UE and the source eNB makes a handover decision configuration information, determines handover preparation cell list;

[0015] B、源eNB向切换准备小区所属的准备eNB发送切换请求消息,启动切换准备定时器; [0015] B, the source eNB to the handover preparation cell belongs prepared eNB sends a handover request message, a timer starts handover preparation;

[0016] C、源eNB判断切换准备定时器是否超时,是则执行步骤E,否则执行步骤D ; [0016] C, the source eNB determines whether the handover preparation timer expires, if yes, step E, otherwise step D;

[0017] D、源eNB判断是否接收到来自切换准备小区的切换请求响应消息;如果接收到切换请求响应消息,判断发送该切换请求响应消息的切换准备小区是否为最佳切换准备小区,是则,源eNB将该切换准备小区作为此次切换的切换目标小区向UE发起切换命令,结束切换目标小区选择流程,否则,返回步骤C ;如果没有接收到切换请求响应消息,返回步骤C; [0017] D, the source eNB determines whether a handover preparation from the cell handover request response message; if the received handover request response message, sending the handover request is determined in response to whether the handover preparation message cell is the best cell handover preparation, it is , the source eNB handover preparation cell handover target cell as the handover command to the UE initiates a handover, the handover target cell selection process ends, otherwise, returns to step C; if not received the handover request response message, returns to step C;

[0018] E、源eNB在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,是则,源eNB将该切换准备小区作为此次切换的切换目标小区向UE发起切换命令,结束切换目标小区选择流程,否则,源eNB判定切换准备失败,结束切换流程。 [0018] E, the source eNB determines whether or not there has been preferred cell handover preparation request response message in reply to the switching cell handover preparation, it is, the source eNB handover preparation cell handover target cell as the handover UE initiates a handover to command, the end of the handover target cell selection process, otherwise, the source eNB determines handover preparation failure, the end of the handover process.

[0019] 所述步骤D中,在源eNB判断是否接收到来自切换准备小区的切换请求响应消息之前,该方法还包括: [0019] In the step D, whether it has received before the handover preparation from the cell in the handover request response message to the source eNB determination, the method further comprising:

[0020] 源eNB判断是否接收到所有切换准备小区通过所属的准备eNB回复的切换请求响应消息,如果是,执行步骤E,否则,执行所述源eNB判断是否接收到来自切换准备小区的切换请求响应消息的步骤。 [0020] The source eNB determines whether a handover preparation for all cell belongs by preparing reply eNB handover request response message, if yes, step E, otherwise, the source eNB determines whether a handover from a handover preparation request to a cell step response message.

[0021] 步骤D中所述判断发送该切换请求响应消息的切换准备小区是否为最佳切换准备小区,包括: [0021] Step D judges to transmit the handover request response message is the best cell is a handover preparation handover preparation cell, comprising:

[0022] 判断发送该切换请求响应消息的切换准备小区是否在UE测量上报中信号质量最好并且接纳了UE的所有系统架构演进SAE承载,如果是,则该小区为最佳切换准备小区,否贝U,该小区不是最佳切换小区。 All System Architecture Evolution SAE bearer if [0022] Analyzing transmits the handover request response message to report the cell handover preparation signal quality measured by the UE and receiving the best of the UE, if yes, the best cell is a cell handover preparation, NO shell U, the cell is not the best cell handover.

[0023] 步骤E中所述源eNB在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,包括: [0023] Step E, the source eNB determines handover request response message has returned to the cell whether there is handover preparation handover preparation is preferably a cell, comprising:

[0024] E1、在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有SAE承载的切换准备小区,是则执行步骤E2,否则,源eNB判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区; [0024] E1, has been reply handover request response message of the handover preparation cell, it is determined whether or not there all handover preparation cells SAE bearer capable of receiving UE, if yes, performing step E2 of, otherwise, the source eNB determines a request response in Replied switch preferred cell handover preparation absence cell handover preparation message;

[0025] E2、在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区。 [0025] E2, select UE measurement reporting signal quality as the best cell in the preferred cell handover preparation cell handover preparation capable of receiving all the SAE bearers of the UE, the source eNB determines handover request response message has returned to the cell handover preparation present preferred cell handover preparation.

[0026] 步骤E中所述源eNB在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,包括: [0026] Step E, the source eNB determines handover request response message has returned to the cell whether there is handover preparation handover preparation is preferably a cell, comprising:

[0027] E1、在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有SAE承载的切换准备小区,是则执行步骤E2,否则执行步骤E3 ; [0027] E1, has replied to the handover request response message cell handover preparation, it is determined whether there is handover to all SAE bearers of the UE capable of receiving a cell preparation, a step E2 of the executed, otherwise step E3;

[0028] E2、在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区; [0028] E2, select UE measurement reporting signal quality as the best cell in the preferred cell handover preparation cell handover preparation capable of receiving all the SAE bearers of the UE, the source eNB determines handover request response message has returned to the cell handover preparation cell handover preparation is present preferred;

[0029] E3、判断待切换的UE是否有保证比特率GBR业务,是则执行步骤E4,否则执行步骤E5 ; [0029] E3, determining whether the UE is to be handed guaranteed bit rate GBR services, a step E4 is executed, otherwise step E5;

[0030] E4、在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有GBR业务承载的切换准备小区;是则,在能够接纳UE的所有GBR业务承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;否则,源eNB判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区; [0030] E4, has been reply handover request response message of the handover preparation cell, it is determined whether there is handover preparation cell capable of receiving a UE all GBR traffic bearer; if yes, capable of receiving a UE all GBR traffic bearer handover preparation cell selected UE measurement reporting signal quality as the best cell handover preparation is preferably a cell, the source eNB determines handover preparation is preferably present in the cell has returned to the handover request response message cell handover preparation; otherwise, the source eNB determines handover request Replied preferred cell handover preparation absence cell handover preparation response message;

[0031] E5、在能够接纳UE的承载数最多的切换准备小区中选择UE测量上报信号质量最好的切换准备小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;否则,源eNB判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 [0031] E5, the number of UE capable of receiving a maximum load of handover preparation UE measurement report cell selecting the best signal quality as the preferred cell handover preparation ready cell handover, the source eNB determines handover preparation has been restored in the handover request response message preferably the cell is present in cell handover preparation; otherwise, the source eNB determines handover preparation is preferably not present in the cell has returned to the handover request response message in a cell handover preparation.

[0032] 本发明还公开了一种基站eNB,包括:收发单元、切换准备定时器和控制单元; [0032] The present invention also discloses the eNB, a base station, comprising: a transceiver unit, a control unit and a handover preparation timer;

[0033] 所述收发单元,用于在控制单元的控制下接收来自用户设备UE的测量上报和来自各个切换准备小区所属的准备eNB的切换请求响应消息并传送给控制单元,接收来自控制单元的切换请求消息并发送给各个切换准备小区所属的准备eNB,接收来自控制单元的切换命令并发送给UE; [0033] The transceiver unit is configured to receive measurements from the user equipment UE under the control of the control unit and prepare reports from each switch cell belongs prepared eNB handover request response message and transmitted to the control unit, receives from the control unit the handover request message and sends the handover preparation prepared each cell belongs eNB, receives a handover command from the control unit sends the UE;

[0034] 所述切换准备定时器,用于在控制单元的控制下启动或关闭,在定时器时间到达时向控制单元发送超时消息; [0034] The handover preparation timers to turn on or off under the control of the control unit, the control unit transmits a timeout message to the arrival time of the timer;

[0035] 所述控制单元,用于接收来自收发单元的UE的测量上报,根据UE的测量上报和自身的配置信息做出切换决策,确定切换准备小区列表;生成切换请求消息并发送给收发单器;在未收到来自切换准备定时器的超时消息时,控制收发单元接收切换请求响应消息,每次接收到切换准备小区的切换请求响应消息后,判断发送该切换请求响应消息的切换准备小区是否为最佳切换准备小区,如果是,将该切换准备小区作为此次切换的切换目标小区生成切换命令发送给收发单元并控制收发单元停止接收切换请求响应消息,否则,控制收发单元继续接收切换请求响应消息;在收到来自切换准备定时器的超时消息后,在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,如果是,将该切换准备小区作为此次切换的切换目标小区生成切换命 [0035] The control unit for receiving from the transceiver unit UE measurement report, and reports its own configuration information to make switching decisions based on the measurement of the UE, determines handover preparation cell list; generating a handover request message sent to a single transceiver ; a timeout is not received after the handover preparation message from the timer, controls the transceiver unit receives the handover request response message, each receiving the handover cell handover preparation request response message, sending the handover request determines the handover preparation response message cell whether a handover preparation for the best cell, if yes, the handover preparation the cell as a handover target cell generates a handover command to the switching unit and controls the transceiver unit is the transceiver stops receiving the handover request response message, otherwise, the control unit continues the transceiver receiving a handover request response message; after receiving the handover preparation message from the timeout timer has replied in response to the handover request message cell handover preparation is determined whether there is handover preparation is preferably a cell, if it is, the cell as the handover handover preparation the handover target cell generates switching commands 发送给收发单元,否则,判定切换准备失败。 Transmitting to the transceiver unit, otherwise, determines that the handover preparation failure.

[0036] 所述控制单元,进一步用于在未收到来自切换准备定时器的超时消息时,判断是否接收到所有切换准备小区通过所属的准备eNB回复的切换请求响应消息,如果接收到所有切换准备小区回复的切换请求响应消息,在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,如果是,将该切换准备小区作为此次切换的切换目标小区生成切换命令发送给收发单元,否则,判定切换准备失败,如果没有接收到所有切换准备小区回复的切换请求响应消息,控制收发单元继续接收切换请求响应消息。 [0036] The control unit is further configured to time-out message is not received from the handover preparation timer, determines whether the cell is received by all the handover preparation preparing reply belongs eNB handover request response message, if the received handover all cell handover preparation request response reply message, determines whether there has been preferred cell handover preparation response message reply to the handover request handover preparation cell, and if so, the handover preparation cell as the handover target handover cell generates a handover command sent to a transceiver unit, otherwise, determines that a handover preparation fails, the switching is not received all the reply cell handover preparation request response message, the control unit continues the transceiver receiving a handover request response message.

[0037] 所述控制单元,用于判断发送该切换请求响应消息的切换准备小区是否在UE测量上报中信号质量最好并且接纳了UE的所有系统架构演进SAE承载,如果是,则判断该小区为最佳切换准备小区,否则,判断该小区不是最佳切换准备小区。 [0037] The control unit for transmitting the handover request determines whether the handover preparation response message reporting a cell in the best signal quality measured by the UE and receives all System Architecture Evolution SAE bearers of the UE, if yes, determines that the cell best handover preparation for the cell, otherwise, determining that the cell is not the best cell handover preparation.

[0038] 所述控制单元,用于在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有SAE承载的切换准备小区;如果存在能够接纳UE的所有SAE承载的切换准备小区,在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;如果不存在能够接纳UE的所有SAE承载的切换准备小区,判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 [0038] The control unit has replied to the handover request response message cell handover preparation, the handover preparation is determined whether there is a cell capable of receiving all the SAE bearers of the UE; if there is a UE capable of receiving a handover preparation for all SAE bearers cell, the UE measures the selected cell handover preparation capable of receiving all the SAE bearers of the UE reports the best signal quality as the preferred cell-cell handover preparation, handover preparation is determined that there has been the preferred handover request response message in reply to the switching of the cell preparation cells; cell if the handover preparation capable of receiving all the SAE bearers of the UE does not exist, determines the preferred handover preparation is not present in the cell has returned to the handover request response message in a cell handover preparation.

[0039] 所述控制单元,用于在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有SAE承载的切换准备小区;如果存在能够接纳UE的所有SAE承载的切换准备小区,在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;如果不存在能够接纳UE的所有SAE承载的切换准备小区,判断UE 是否有保证比特率GBR业务;如果UE有GBR业务,在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有GBR业务承载的切换准备小区;如果是,在能够接纳UE的所有GBR业务承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换 [0039] The control unit has replied to the handover request response message cell handover preparation, the handover preparation is determined whether there is a cell capable of receiving all the SAE bearers of the UE; if there is a UE capable of receiving a handover preparation for all SAE bearers cell, the UE measures the selected cell handover preparation capable of receiving all the SAE bearers of the UE reports the best signal quality as the preferred cell-cell handover preparation, handover preparation is determined that there has been the preferred handover request response message in reply to the switching of the cell preparation cell; if handover preparation cell capable of receiving a UE all SAE bearers do not exist, it is determined whether the UE is guaranteed bit rate GBR services; if the UE has GBR traffic, has been reply handover request response message of the handover preparation cell, it is determined whether or not there All UE receiving the handover preparation GBR traffic bearers cell; if yes, select the best UE measurement reporting signal quality in a cell capable of receiving UE a handover preparation for all cell GBR traffic bearer handover preparation as a preferred cell, reply has been determined present preferred switching handover request response message in the handover preparation cell 准备小区,否则,判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区;如果UE没有GBR业务,在能够接纳UE的承载数最多的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区,否则,判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 Preparing a cell, otherwise, determines the preferred handover preparation is not present in the cell has returned to the handover request response message in a cell handover preparation; If the UE does GBR traffic, the number of UE capable of receiving a maximum load of a cell handover preparation selected UE measurement report signal the best quality cell handover preparation as a preferred cell, the cell is determined that there has been the preferred handover preparation response message reply to the handover request handover preparation cell, otherwise, determines that there is more in the handover request response message has returned to the cell handover preparation good cell handover preparation.

[0040] 由以上发明内容可见,本发明的小区切换方法在源eNB中加入切换准备定时器, 通过该定时器控制切换过程中源eNB的等待时间,在切换准备定时器超时之前,源eNB每接 [0040] Summary of the invention seen from the above, the present invention is a cell handover method of adding the source eNB handover preparation timer, the switching latency of Source eNB over by the timer control, the timer expires before the handover preparation, each of the source eNB meet

8收到一个切换请求ACK消息即进行判断,如果发送该消息的切换准备小区是最佳切换准备小区,源eNB不再继续等待接收其它的切换请求ACK消息,因此本发明的小区切换方法能够快速确定切换目标小区。 8 receives a handover request ACK message that is determined, if the transmitted message is the best cell handover preparation ready cell handover, the source eNB continues to wait longer to receive other handover request ACK message, so the cell handover method according to the invention can quickly determining the handover target cell. 并且,根据各个切换准备小区的接纳承载情况以及该切换准备小区在UE测量上报中的信号质量在切换准备小区中选择切换目标小区,因此本发明的小区切换方法能够准确地选择出信号质量好的切换目标小区。 Further, according to the case of receiving respective bearing cell handover preparation and the handover preparation cell signal quality measurements reported by the UE handover target cell in the selected cell handover preparation, the handover method according to the present invention and therefore the cell can be accurately selected good signal quality handover target cell.

附图说明 BRIEF DESCRIPTION

[0041] 图1为本发明第一较佳实施例小区切换方法的流程图; [0041] FIG. 1 is a flowchart of a first embodiment of a cell handover method preferred embodiment of the present invention;

[0042] 图2为本发明第二较佳实施例小区切换方法的流程图; [0042] FIG 2 is a flowchart of a method for switching a second preferred embodiment of the invention, a cell;

[0043] 图3为本发明实施例eNB的内部结构示意图。 [0043] FIG. 3 is a schematic internal structure of an eNB embodiment of the present invention.

具体实施方式 Detailed ways

[0044] 为了使本发明的目的、技术方案和优点更加清楚,下面结合附图和具体实施例对本发明进行详细描述。 [0044] To make the objectives, technical solutions, and advantages of the invention more apparent, the accompanying drawings and specific embodiments of the present invention will be described in detail with.

[0045] 本发明的基本思想是,在源eNB中加入切换准备定时器,在发出切换请求消息后, 启动切换准备定时器;在定时器超时之前,每接收到一个切换请求ACK消息即判断发送该消息的切换准备小区是否为最佳切换准备小区,如果是,源eNB将该切换准备小区作为切换目标小区向UE发起切换命令,不再等待接收其它的切换请求ACK消息;如果直到定时器超时仍没有选择到切换目标小区,则在所有已经接收到的切换请求ACK消息对应的切换准备小区中选择一个较佳切换准备小区作为切换目标小区向UE发起切换命令。 [0045] The basic idea of ​​the invention is added to the source eNB handover preparation timer, after issuing the handover request message, a timer starts handover preparation; before the timer times out, each receiving a handover request ACK message that is transmitted is determined the handover preparation message whether the cell is the best cell handover preparation, if so, the source eNB handover preparation as a handover target cell to initiate cell handover command to the UE, no longer waits to receive additional handover request ACK message; if the timer expires until still not selected handover to the target cell, the handover request ACK message corresponding to the selected cell to prepare a cell handover preparation as a preferred handover target cell in the handover command to the UE initiates all been received handover.

[0046] 以下通过较佳实施例对本发明的小区切换方法进行说明。 [0046] Here will be described a cell of the handover method of the present invention by preferred embodiments. 图1为本发明第一较佳实施例小区切换方法的流程图。 Flowchart of cell handover method first preferred embodiment of the present invention, FIG. 如图1所示,该方法包括如下步骤: As shown in FIG 1, the method comprising the steps of:

[0047] 步骤11 :源eNB接收UE的测量上报,根据UE的测量上报和源eNB的配置信息做出切换决策,确定切换准备小区列表。 [0047] Step 11: The receiving UE the source eNB measurement report, the measurement report of the UE and the source eNB makes a handover decision configuration information, determining a switching cell list preparation. 在此步骤中,源eNB综合考虑UE的测量上报以及预先在源eNB上配置的禁止小区列表等信息确定切换准备小区。 In this step, considering the source eNB UE measurement reporting and prohibited cell list information pre-configured on the source eNB determines handover preparation cell.

[0048] 步骤12 :源eNB向各个切换准备小区所属的准备eNB发送切换请求消息,启动切换准备定时器,等待接收各个切换准备小区通过所属的准备eNB回复的切换请求ACK消息。 [0048] Step 12: The source eNB handover preparation ready to each cell belongs, the eNB sends a handover request message, handover preparation starts a timer, waits for reception of the respective cell by the handover preparation preparing reply belongs eNB handover request ACK message. 该切换准备定时器用来控制切换准备过程中源eNB的等待时间,该定时器的定时时间可以根据实际网络的需求设置。 The timer is used to control the handover preparation through the handover preparation latency of Source eNB, the timing time of the timer may be set according to the actual network.

[0049] 在步骤12之后,还可以进一步包括各个切换准备小区进行接纳控制的步骤。 [0049] After step 12, it may further comprise the step of each cell for handover preparation admission control.

[0050] 步骤13 :源eNB判断切换准备定时器是否超时,如果是,执行步骤18,否则,执行步骤14。 [0050] Step 13: The source eNB determines whether the handover preparation timer expires, if yes, step 18, otherwise, perform step 14.

[0051] 步骤14 :源eNB继续等待接收切换请求ACK消息。 [0051] Step 14: the source eNB continues to wait for receiving a handover request ACK message.

[0052] 步骤15 :源eNB判断是否接收到切换请求ACK消息,如果是,执行步骤16,否则,返回步骤13。 [0052] Step 15: determining whether the source eNB receives the handover request ACK message, if yes, step 16, otherwise, returns to step 13.

[0053] 步骤16 :源eNB判断发送该切换请求ACK消息的切换准备小区是否为最佳切换准备小区,如果是,执行步骤17,否则,返回步骤13。 [0053] Step 16: determining the source eNB transmits the handover request handover preparation for the cell ACK message whether handover preparation best cell, if yes, step 17, otherwise, returns to step 13. 在此步骤中,如果判断为是,可以进一步关闭切换准备定时器。 In this step, if it is determined that the handover preparation may further turn off the timer.

[0054] 在此步骤中,判断发送该切换请求ACK消息的切换准备小区是否为最佳切换准备小区的方法是:判断该小区是否在UE测量上报中信号质量最好并且接纳了UE的所有SAE 承载,如果是,则该小区为最佳切换准备小区,否则,该小区不是最佳切换准备小区。 [0054] In this step, it is determined that the handover request transmits the handover preparation message ACK cell is a cell handover preparation method is preferred: a cell determining whether the reported signal quality measurements at the UE and receiving the best of all the UE SAE bearer, if so, the best handover preparation for the cell-cell, otherwise, the cell is not the best cell handover preparation.

[0055] 通过步骤13到16的循环过程,则在切换准备定时器不超时的情况下,源eNB每接收到一个切换请求ACK消息后,即对发送该消息的切换准备小区是否为最佳切换准备小区做出判断。 After the case of [0055] cycle through steps 13 to 16, in the handover preparation timer is not timed out, each of the source eNB receives a handover request ACK message, i.e. the message transmission whether a handover preparation for the cell switching best preparation district judge.

[0056] 步骤17 :源eNB将最佳切换准备小区作为此次切换的切换目标小区向UE发起切换命令。 [0056] Step 17: The source eNB handover preparation best handover target cell as the handover initiate cell handover command to the UE. 源eNB通过该切换命令,命令UE切换到切换目标小区。 The source eNB through the handover command, command the UE to the handover target cell. 在步骤17之后,结束流程。 After step 17, the end of the process.

[0057] 步骤18 :源eNB在已回复切换请求ACK消息的切换准备小区中判断是否存在较佳切换准备小区,如果是,执行步骤19,否则,执行步骤20。 [0057] Step 18: The source eNB determines handover request ACK reply has been handover preparation message whether there is preferred a cell handover preparation cell, if yes, step 19, otherwise, perform step 20. 在此步骤中,还可以进一步关闭切换准备定时器。 In this step, the handover preparation may further turn off the timer.

[0058] 在此步骤中,在已回复切换请求ACK消息的切换准备小区中判断是否存在较佳切换准备小区的具体方法如下:在已回复切换请求响应消息的切换准备小区中,首先判断是否存在能够接纳UE的所有SAE承载的切换准备小区。 [0058] In this step, it is determined in reply to the handover request ACK message has a specific method for handover preparation in the presence or absence cell handover preparation is preferably a cell as follows: in reply to the handover request response message is the handover preparation cell, first, judges whether there All SAE bearer handover of the UE can be ready to receive cells. 如果存在能够接纳UE的所有SAE 承载的切换准备小区,在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区。 If the cell capable of receiving a handover preparation for all SAE bearer of the UE exists, select UE measurement reporting signal quality as the best cell in the preferred cell handover preparation cell handover preparation capable of receiving all the SAE bearers of the UE, the source eNB determines Replied cell handover preparation present preferred cell handover request handover preparation response message. 如果不存在能够接纳UE的所有SAE承载的切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区,或者,继续判断待切换的UE是否有GBR业务。 If the handover preparation cell capable of receiving all the SAE bearers of the UE does not exist, the source eNB determines handover preparation is preferably not present in the cell has returned to the handover request response message in the handover preparation cell, or continue to be determined whether the UE has switched GBR traffic . 如果待切换的UE有GBR业务,在已回复切换请求响应消息的切换准备小区中,继续判断是否存在能够接纳UE的所有GBR业务承载的切换准备小区。 If the UE has to be switched GBR traffic, has replied to the handover request response message of the cell handover preparation, handover preparation continues to determine whether there is any UE capable of receiving cell GBR traffic bearers. 如果存在能够接纳UE的所有GBR业务承载的切换准备小区,在能够接纳UE的所有GBR业务承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区。 If the UE is capable of receiving a handover preparation for all cell GBR bearer service exists, select UE measurement reporting signal quality as the best cell in the preferred cell handover preparation capable of receiving UE handover preparation for all cell GBR traffic bearers, the source eNB determines reply handover preparation already exists preferred cell handover preparation cell handover request response message. 如果不存在能够接纳UE的所有GBR业务承载的切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 If the UE capable of receiving a handover preparation for all cell GBR bearer service does not exist, the source eNB determines handover preparation is preferably not present in the cell has returned to the handover request response message in a cell handover preparation. 如果待切换的UE没有GBR业务,在能够接纳UE的承载数最多的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;否则,源eNB判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 If the UE is not to be switched GBR traffic, the UE capable of receiving a maximum number of bearer handover preparation selected cell reported by the UE measures the signal quality of the best cell as a preferred cell handover preparation, it has replied to the source eNB determines handover request response message handover preparation present preferred cell handover preparation cell; otherwise, the source eNB determines handover preparation is preferably not present in the cell has returned to the handover request response message in a cell handover preparation.

[0059] 步骤19 :源eNB将较佳切换准备小区作为此次切换的切换目标小区向UE发起切换命令。 [0059] Step 19: The source eNB handover preparation preferred handover target cell as the handover initiate cell handover command to the UE. 源eNB通过该切换命令,命令UE切换到切换目标小区。 The source eNB through the handover command, command the UE to the handover target cell. 在步骤19之后,结束目标小区选择流程。 After step 19, the end of the target cell selection process.

[0060] 步骤20 :源eNB判定切换准备失败。 [0060] Step 20: The source eNB determines handover preparation fails. 源eNB在判定切换准备失败后,不向UE发送切换命令,UE不进行小区切换,继续停留在当前的服务小区。 The source eNB after the handover preparation failure determination, not to send a handover command to the UE, UE does not perform cell handover, continue to remain in the current serving cell. 在步骤20之后,结束目标小区选择流程。 After step 20, the end of the target cell selection process.

[0061] 在上述步骤12至20的基础上,该小区切换方法还可以进一步对是否接收到所有切换准备小区的切换请求ACK消息进行判断,以便于更加节省源eNB的等待时间。 [0061] Based on the foregoing steps 12 to 20 on the cell of the handover method may further whether a handover preparation for all cell handover request ACK message is determined, so as to save more time to wait for the source eNB. 在步骤13 中,如果源eNB判断切换准备定时器不超时,则在执行步骤14之前,进一步包括,步骤131 : 源eNB判断是否接收到所有切换准备小区通过所属的准备eNB回复的切换请求ACK消息,如果是,执行步骤18,否则,继续执行步骤14。 In step 13, if the source eNB determines handover preparation timer is not timed out, before performing the step 14, further comprising, the step 131: The source eNB determines whether a handover preparation for all cell belongs by preparing eNB handover request ACK reply message If yes, step 18, otherwise, proceed to step 14.

[0062] 通过图1所示的小区切换方法,对切换准备小区中是否存在最佳切换准备小区或较佳切换准备小区进行判断,并且当收到最佳切换准备小区的切换请求ACK消息后立即确认将UE切换到该小区,通过一个定时器对等待最佳切换准备小区出现的等待时间进行控制,因此能够准确快速地将UE切换到信号质量好的小区中。 [0062] by a cell handover method shown in FIG. 1, whether there is an optimum cell handover preparation for handover preparation in a cell or cell handover preparation for determination preferred, and after receiving the handover request ACK message immediately best cell handover preparation confirmed the UE to the cell, the waiting time for waiting for the best control of the handover preparation through a timer cell appears, it is possible to quickly and accurately to handover the UE to a good signal quality in the cell.

[0063] 将图1所示的小区切换方法应用到一个具体切换过程实例中,该实例中,以网络环境中包括UE、源eNB、第一准备eNB和第二准备eNB为例,以下通过本发明第二较佳实施例对上述网络环境的切换过程进行说明。 Cell handover method shown in [0063] FIG 1 is applied to a specific example of a handover procedure in this example, comprises the UE to the network environment, the source eNB, first preparation and second preparation eNB eNB an example, the present the second preferred embodiment of the invention, the above-described process of switching network environment will be described. 图2为本发明第二较佳实施例小区切换方法的流程图。 Flowchart of an embodiment of the second preferred cell handover method of the present invention FIG. 在该实施例中,准备eNB既包括第一准备eNB和第二准备eNB,还包括源eNB自身。 In this embodiment, both the eNB comprises a first preparation and second preparation prepared eNB eNB, the source eNB further comprising itself. 源eNB与第一准备eNB之间的切换以X2AP切换为例,源eNB与第二准备eNB之间的切换以S IAP切换为例。 Switching between the source eNB and prepared eNB in ​​the first switching X2AP an example, switching between the source eNB and prepared eNB to a second switch S IAP Example. 参见图2,本发明第二较佳实施例的具体过程如下: Referring to Figure 2, the specific process of the second preferred embodiment of the present invention are as follows:

[0064] 步骤201 =UE向源eNB发送测量上报。 [0064] Step 201 = UE sends a measurement report to the source eNB.

[0065] 步骤202 :源eNB根据UE的测量上报和源eNB的配置信息做出切换决策,确定切换准备小区。 [0065] Step 202: The source eNB UE measurement reporting and configuration information of the source eNB makes a handover decision, the handover preparation is determined cell.

[0066] 步骤203 :源eNB向各个切换准备小区所属的切换准备eNB发送切换请求消息。 [0066] Step 203: The source eNB preparation for the handover belongs to the respective cell handover preparation eNB sends a handover request message. 其中包括,步骤203a :源eNB向自身发送切换请求消息;步骤20¾ :源eNB通过X2AP向第一准备eNB发送切换请求消息;步骤203c :源eNB通过SlAP向第二准备eNB发送切换请求消息。 Which comprises the step of 203a: The source eNB sends a handover request message to itself; Step 20¾: the source eNB sends a handover request message to the eNB through a first prepare the X2AP; Step 203c: the source eNB sends a handover request message to the second eNB prepared by SlAP. 源eNB、第一准备eNB和第二准备eNB继续将切换请求消息下发到所属的切换小区 The source eNB, a first and a second ready prepared eNB will continue eNB handover request message sent to the switching cell belongs

[0067] 步骤204 :源eNB启动切换准备定时器。 [0067] Step 204: the source eNB starts the handover preparation timer. 该切换准备定时器启动后,在进行后续步骤的同时进行计时,直到切换准备定时器到时的时刻,向源eNB发出切换准备定时器超时消息。 After the handover preparation timer is started, while carrying out the subsequent steps for timing until when the handover preparation timing to the timer, the handover preparation message sent timeout timer to the source eNB.

[0068] 步骤205 :各个切换准备小区接收到切换请求消息后进行接纳控制,其中包括,步骤20¾ :源eNB下的切换准备小区接收到切换请求消息后进行接纳控制;步骤20¾ :第一准备eNB下的切换准备小区接收到切换请求消息后进行接纳控制;步骤205c :第二切换准备eNB下的切换准备小区接收到切换请求消息后进行接纳控制。 [0068] Step 205: each cell receives the switching handover preparation for the admission control request message, which includes the step of 20¾: handover preparation cell under the source eNB receives the handover request message from the admission control; Step 20¾: preparing a first eNB switching the cell receives the handover preparation for the admission control request message; step 205c: second handover preparation handover preparation cell under the eNB receives the handover request message from the admission control.

[0069] 步骤206 :源eNB向自身发送切换请求ACK消息。 [0069] Step 206: The source eNB sends a handover request ACK message to itself. 由于本实施例中的准备eNB包括源eNB、X2AP切换的准备eNB以及S IAP切换的准备eNB,因此作为准备eNB的源eNB向自身发送的切换请求ACK消息最先到达源eNB。 Since the present embodiment prepared eNB embodiment includes a source eNB, the X2AP eNB handover preparation and handover preparation eNB S IAP, so as to prepare the eNB to the source eNB transmits its own handover request ACK message arrives first source eNB.

[0070] 步骤207 :源eNB判断发送该切换请求ACK消息的切换准备小区是否为最佳切换准备小区。 [0070] Step 207: The source eNB transmits the handover request determines the handover preparation message ACK cell is a cell optimum handover preparation. 如果判断为是,则源eNB将最佳切换准备小区作为此次切换的切换目标小区向UE发起切换命令。 If it is determined that the source eNB handover preparation best cell as the handover target cell to the handover UE initiates a handover command. 在本实施例中,以判断为否为例,则继续执行后续步骤。 In the present embodiment, NO is determined to, for example, proceed to the subsequent steps.

[0071] 步骤208 :第一准备eNB向源eNB发送切换请求ACK消息。 [0071] Step 208: preparing a first eNB to the source eNB sends a handover request ACK message.

[0072] 步骤209 :源eNB判断发送该切换请求ACK消息的切换准备小区是否为最佳切换准备小区。 [0072] Step 209: The source eNB transmits the handover request determines the handover preparation message ACK cell is a cell optimum handover preparation. 如果判断为是,则源eNB将最佳切换准备小区作为此次切换的切换目标小区向UE发起切换命令。 If it is determined that the source eNB handover preparation best cell as the handover target cell to the handover UE initiates a handover command. 在本实施例中,仍以判断为否为例,则继续执行后续步骤。 In the present embodiment, an example is still determined as NO, proceed to subsequent steps.

[0073] 步骤210 :第二准备eNB向源eNB发送切换请求ACK消息。 [0073] Step 210: second preparation eNB to the source eNB sends a handover request ACK message.

[0074] 步骤211 :源eNB判断发送该切换请求ACK消息的切换准备小区是否为最佳切换准备小区。 [0074] Step 211: The source eNB transmits the handover request determines the handover preparation message ACK cell is a cell optimum handover preparation. 如果判断为是,则源eNB将最佳切换准备小区作为此次切换的切换目标小区向UE发起切换命令。 If it is determined that the source eNB handover preparation best cell as the handover target cell to the handover UE initiates a handover command. 在本实施例中,仍以判断为否为例,则继续执行后续步骤。 In the present embodiment, an example is still determined as NO, proceed to subsequent steps. [0075] 在本实施例中,以步骤211之后切换准备定时器超时为例。 [0075] In the present embodiment, after the step 211 Example handover preparation timer expires. 则有步骤212:源eNB 接收到切换准备定时器超时消息。 There Step 212: the source eNB receives the handover preparation message timer expires.

[0076] 步骤213 :源eNB在已回复切换请求ACK消息的切换准备小区中判断是否存在较佳切换准备小区。 [0076] Step 213: the source eNB determines handover request ACK message has returned the cell whether there is handover preparation is preferably a cell handover preparation. 也就是说,源eNB在已经回复了切换请求ACK消息的源eNB、第一准备eNB 以及第二准备eNB下的切换准备小区中判断是否存在较佳切换准备小区。 That is, the source eNB in ​​the handover request has been responded to the source eNB ACK message, a first handover preparation prepared eNB and a second cell in the eNB determines whether there is prepared the preferred cell handover preparation. 如果不存在,源eNB判定切换准备失败。 If not, the source eNB determines handover preparation fails. 在本实施例中,以已回复切换请求ACK消息的切换准备小区中存在较佳切换准备小区为例,则继续执行后续步骤。 In the present embodiment, has replied to the presence of a handover request ACK message cell handover preparation in the preferred cell handover preparation, for example, proceed to the subsequent steps.

[0077] 步骤214 :源eNB向UE发起切换命令。 [0077] Step 214: the source eNB initiates handover command to the UE. 在本实施例中,源eNB向UE发起的切换命令中,将较佳切换准备小区作为此次切换的切换目标小区。 In the present embodiment, the source eNB to the UE a handover command for initiating a handover preparation the preferred handover target cell as the handover cell.

[0078] 以上采用具体实施例对本发明提出的小区切换方法进行了说明,下面通过另一个具体实施例对采用该方法的eNB进行介绍。 [0078] The foregoing cell handover method proposed by the present invention has been described using specific examples, the following eNB embodiments of this method is described by another particular embodiment. 图3为本发明实施例eNB的内部结构示意图。 FIG 3 is a schematic internal structure of an eNB embodiment of the present invention. 如图3所示,本发明实施例的eNB包括:收发单元301、切换准备定时器302和控制单元303。 As shown in FIG. 3, eNB embodiment of the present invention comprises: a transceiver unit 301, a timer 302 and handover preparation control unit 303.

[0079] 收发单元301在控制单元303的控制下接收来自UE的测量上报和来自各个切换准备小区所属的准备eNB的切换请求响应消息并传送给控制单元303,接收来自控制单元303的切换请求消息并发送给各个切换准备小区所属的准备eNB,接收来自控制单元303的切换命令并发送给UE。 Switching [0079] The transceiver unit 301 receives the measurement report from the UE and the handover request from the prepared eNB respective handover preparation cell belongs response message and transmitted to the control unit under the control of the control unit 303 303, receiving from the control unit 303 of the request message each cell sends handover preparation belongs prepared eNB, the handover command received from the control unit 303 sends the UE.

[0080] 切换准备定时器302在控制单元303的控制下启动或关闭,在定时器时间到达时向控制单元303发送超时消息。 [0080] The timer 302 to start handover preparation or closed under control of the control unit 303 transmits a timeout message to the arrival time of the timer control unit 303.

[0081] 控制单元303接收来自收发单元301的UE的测量上报,根据UE的测量上报和自身的配置信息做出切换决策,确定切换准备小区,生成切换请求消息发送给收发单元301, 启动切换准备定时器302 ;在未收到来自切换准备定时器302的超时消息时,控制收发单元301接收切换请求响应消息,每次接收到切换准备小区的切换请求响应消息后,判断发送该切换请求响应消息的切换准备小区是否为最佳切换准备小区,如果是,将该切换准备小区作为此次切换的切换目标小区生成切换命令发送给收发单元301并控制收发单元301停止接收切换请求响应消息;否则,控制收发单元接收切换请求响应消息。 [0081] The control unit 303 receives a UE measurement reporting from the transceiver unit 301, and reports its own configuration information to make switching decisions based on the measurement of the UE, determines handover preparation cell, generating a handover request message to the transceiver unit 301, to start handover preparation a timer 302; not received after a timeout handover preparation message from timer 302, controls the transceiver unit 301 receives a handover request response message, each receiving the handover cell handover preparation request response message, it determines the handover request response message sent the handover preparation for the cell is the best cell handover preparation, if so, the handover preparation the cell as a handover target cell generates a handover command to the switching unit 301 and the transceiver unit 301 controls the transceiver stops receiving the handover request response message; otherwise, controls the transceiver unit receives the handover request response message. 在收到来自切换准备定时器302的超时消息后,在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,如果是,将该切换准备小区作为此次切换的切换目标小区生成切换命令发送给收发单元301并控制收发单元301停止接收切换请求响应消息,否则,判定切换准备失败。 After receiving the handover preparation message timeout from the timer 302, it is determined in response to the handover request message has replied to the presence or absence of cell handover preparation handover preparation preferred cell, if yes, the handover preparation as a handover target cell of the handover generates a cell handover command to the transceiver unit 301 and controls the transceiver unit 301 stops receiving the handover request response message, otherwise, determines that the handover preparation failure.

[0082] 进一步地,控制单元301在未收到来自切换准备定时器302的超时消息时,还可以进一步判断是否接收到所有切换准备小区通过所属的准备eNB回复的切换请求响应消息, 如果接收到所有切换准备小区回复的切换请求响应消息,在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,如果是,将该切换准备小区作为此次切换的切换目标小区生成切换命令发送给收发单元301并控制收发单元301停止接收切换请求响应消息,否则,判定切换准备失败,如果没有接收到所有切换准备小区回复的切换请求响应消息,控制收发单元301继续接收切换请求响应消息。 [0082] Further, the control unit 301 is not received from the handover preparation message timeout timer 302 may be further determined whether all the received handover handover preparation by preparing cell belongs eNB reply request response message, if the received All cell responses switching handover preparation request response message, the handover request reply has been determined in the handover preparation response message whether there is preferred a cell handover preparation cell, if yes, generating a handover as the handover preparation cell handover target cell of the handover command to transceiver 301 and controls the transceiver unit 301 stops receiving the handover request response message, otherwise, it determines that the handover preparation fails, the response message is not received the handover request all handover preparation cell response, and controls the transceiver unit 301 continues to receive a handover request response message .

[0083] 并且,控制单元301在判断发送该切换请求响应消息的切换准备小区是否为最佳切换准备小区时,判断发送该切换请求响应消息的切换准备小区是否在UE测量上报中信号质量最好并且接纳了UE的所有SAE承载,如果是,则判断该小区为最佳切换准备小区,否则,判断该小区不是最佳切换准备小区。 When [0083] Then, the control unit 301 determines in response to sending the handover request message whether a handover preparation for the cell handover preparation best cell, transmits the handover request determines whether the handover preparation response message reporting a cell in the best signal quality measured by the UE and it receives all the SAE bearers of the UE, if yes, determines that the cell is the best cell handover preparation, otherwise, determining that the cell is not the best cell handover preparation.

[0084] 控制单元301在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区时,在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有SAE承载的切换准备小区;如果存在能够接纳UE的所有SAE承载的切换准备小区,在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;如果不存在能够接纳UE的所有SAE承载的切换准备小区,判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区,或者,判断待切换的UE是否有GBR业务;如果待切换的UE有GBR业务,在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有GBR业务承载的切换准备小区;如果是,在能够接 [0084] When the control unit 301 determines whether there has been preferred cell handover preparation request response message in reply to the switching cell handover preparation, the handover request response message has returned to the cell handover preparation, it is determined whether there is a UE capable of receiving all SAE bearer switching cell preparation; if the UE capable of receiving a handover preparation for all SAE bearers cell exists, the UE measures the selected UE capable of receiving a handover preparation for all SAE bearer cells reported signal quality as the best cell handover preparation is preferably a cell, determined that there has been preferred cell handover preparation response message reply to the handover request handover preparation cell; cell if the handover preparation capable of receiving all the SAE bearers of the UE does not exist, it is determined there has been no reply to the handover request response message in a cell handover preparation preferred cell handover preparation, or, to be determined whether the UE has switched GBR services; UE if there GBR traffic to be switched in response to the handover request message has replied to the cell handover preparation, it is determined whether there is a UE capable of receiving all of GBR traffic cell handover preparation bearer; If yes, then it can be UE的所有GBR业务承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区,否则, 判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 All cell handover preparation GBR bearer service selected UE UE measurement reporting signal quality as the best cell handover preparation is preferably a cell, a cell determines that there has been the preferred handover preparation response message reply to the handover request handover preparation cell, otherwise, determined preferred handover preparation has been restored in the absence of cell handover request response message in the handover preparation cell. 如果待切换的UE没有GBR业务,在能够接纳UE的承载数最多的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区,否则,判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 If the UE is not to be switched GBR traffic, most of the handover UE capable of receiving the number of the carrier to prepare a cell selected UE measurement reporting signal quality as the best cell preferred cell handover preparation, handover preparation has been determined that the handover request response message replies preferably the cell is present in cell handover preparation, otherwise, it determines the preferred handover preparation is not present in the cell has returned to the handover request response message in a cell handover preparation.

[0085] 控制单元301还可以在判断发送切换请求响应消息的切换准备小区是最佳切换准备小区之后,以及收到来自切换准备定时器302的超时消息之后,进一步控制切换准备定时器302关闭。 [0085] After the control unit 301 may also transmit the handover request is determined in response to the handover preparation message cell is the best cell handover preparation and handover preparation message is received after a timeout from the timer 302, the timer 302 to further control the handover preparation closed.

[0086] 由以上具体实施方式可见,本发明的小区切换方法在源eNB中加入切换准备定时器,在源eNB向切换准备小区所属的准备eNB发出切换请求消息后启动该切换准备定时器, 在切换准备定时器超时之前,源eNB每接收到一个切换请求ACK消息即判断发送该消息的切换准备小区是否为最佳切换准备小区,如果是,源eNB将该切换准备小区作为切换目标小区向UE发起切换命令,而不再继续等待接收其它的切换请求ACK消息,如果直到定时器超时仍没有选择到最佳切换准备小区,则在所有已经接收到的切换请求ACK消息对应的切换准备小区中选择较佳切换准备小区作为切换目标小区向UE发起切换命令,因此本发明的小区切换方法能够快速确定切换的目标小区。 [0086] From the above specific embodiments, the present invention is a cell handover method of adding the source eNB handover preparation in the timer, the source eNB issues a handover preparation at the eNB belongs to the cell to start handover preparation request message from the handover preparation timer, timer expires before handover preparation, each of the source eNB receives a handover request ACK message that is sending the message determines whether the cell is the best handover preparation handover preparation cell, if it is, the source eNB handover preparation cell to the UE a handover target cell initiating handover command, rather than continue to wait for further receives a handover request ACK message until the timer times out if no selection is still the best cell handover preparation, it has received all the ACK message corresponding to the handover request to switch selected cell preparation cell handover preparation as a preferred handover target cell initiates a handover command to the UE, so a cell handover method according to the present invention can quickly determine the target handover cell. 并且,本发明的小区切换方法中,对最佳切换准备小区和较佳切换准备小区的判断是根据各个切换准备小区的接纳承载情况以及该切换准备小区在UE测量上报中的信号质量做出的,因此本发明的小区切换方法能够准确地选择出信号质量好的切换准备小区作为切换的目标小区,UE在切换小区之后进入信号质量好的小区中,因而不会产生业务中断。 Further, the present invention is a cell handover process, a handover preparation for the best cell and cell determines the preferred handover preparation is ready to receive a cell carrying case according to various handover preparation and handover cell signal quality reported by the UE to make measurements Therefore cell handover method according to the present invention can accurately select handover preparation signal of good quality as a target cell-cell handover, the UE enters a cell of good quality signal in the cell after the handover, so no service interruption.

[0087] 以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明保护的范围之内。 [0087] The foregoing is only preferred embodiments of the present invention but are not intended to limit the present invention, all within the spirit and principle of the present invention, any changes made, equivalent substitutions and improvements should be included within the scope of protection of the present invention.

Claims (10)

1. 一种小区切换方法,其特征在于,该方法包括:A、源基站eNB接收用户设备UE的测量上报,根据UE的测量上报和源eNB的配置信息做出切换决策,确定切换准备小区列表;B、源eNB向切换准备小区所属的准备eNB发送切换请求消息,启动切换准备定时器;C、源eNB判断切换准备定时器是否超时,是则执行步骤E,否则执行步骤D ;D、源eNB判断是否接收到来自切换准备小区的切换请求响应消息;如果接收到切换请求响应消息,判断发送该切换请求响应消息的切换准备小区是否为最佳切换准备小区,是则,源eNB将该切换准备小区作为此次切换的切换目标小区向UE发起切换命令,结束切换目标小区选择流程,否则,返回步骤C ;如果没有接收到切换请求响应消息,返回步骤C ;E、源eNB在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,是 A cell handover method, wherein the method comprises: A, the source eNB receives the user equipment UE measurement reporting, reporting and configuration information of the source eNB makes a handover decision based on measurement of the UE, determines a list of cell handover preparation ; B, the source eNB sends a prepare handover preparation eNB belongs cell handover request message, a timer starts handover preparation; C, the source eNB determines whether the handover preparation timer expires, if yes, step E, otherwise step D; D, source eNB judges whether a handover from a cell handover preparation request response message; if the received handover request response message, sending the handover request determines whether the handover preparation response message cell handover preparation for the best cell, then is, the handover source eNB preparing the cell as the handover target cell to the handover UE initiates handover command, the handover target cell selection process ends, otherwise, returns to step C; if not received the handover request response message, returns to step C; E, the source eNB handover in a Replied cell handover preparation request response message is determined whether there is a better cell handover preparation is ,源eNB将该切换准备小区作为此次切换的切换目标小区向UE发起切换命令,结束切换目标小区选择流程,否则,源eNB判定切换准备失败,结束切换流程。 The source eNB handover preparation cell as the handover target cell of the handover initiate a handover command to UE, the end of the handover target cell selection process, otherwise, the source eNB determines handover preparation failure, the end of the handover process.
2.根据权利要求1所述的小区切换方法,其特征在于,所述步骤D中,在源eNB判断是否接收到来自切换准备小区的切换请求响应消息之前,该方法还包括:源eNB判断是否接收到所有切换准备小区通过所属的准备eNB回复的切换请求响应消息,如果是,执行步骤E,否则,执行所述源eNB判断是否接收到来自切换准备小区的切换请求响应消息的步骤。 The cell of the handover method of claim 1, wherein the step D, whether a handover from a cell handover preparation request response message is determined before the source eNB, the method further comprising: determining whether the source eNB All cells received through the handover preparation preparing reply belongs eNB handover request response message, if yes, step E, otherwise, performing the step of determining whether the source eNB receives the handover preparation from the cell handover request response message.
3.根据权利要求1或2所述的小区切换方法,其特征在于,步骤D中所述判断发送该切换请求响应消息的切换准备小区是否为最佳切换准备小区,包括:判断发送该切换请求响应消息的切换准备小区是否在UE测量上报中信号质量最好并且接纳了UE的所有系统架构演进SAE承载,如果是,则该小区为最佳切换准备小区,否则, 该小区不是最佳切换小区。 The cell or the switching method of claim 12, wherein said determining step D transmits the handover request response message whether a handover preparation for the cell handover preparation best cell, comprising: sending the handover request determination All system architecture Evolution SAE bearer handover preparation response message whether the cell signal quality reported by the UE and receiving the best measurement of the UE, if yes, the best cell is a cell handover preparation, otherwise, the cell is not the best cell handover .
4.根据权利要求1或2中所述的小区切换方法,其特征在于,步骤E中所述源eNB在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,包括:E1、在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有SAE承载的切换准备小区,是则执行步骤E2,否则,源eNB判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区;E2、在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区。 4. The cell according to claim 1 or claim 2 handover method, wherein, in step E the source eNB determines whether there has been preferred cell handover preparation response message reply to the handover request handover preparation in a cell, comprising: E1, has been reply handover request response message of the handover preparation cell, it is determined whether or not there all handover preparation cells SAE bearer capable of receiving UE, if yes, performing step E2 of, otherwise, the source eNB determines handover Replied handover request response message preparation preferred cell handover preparation is not present in the cell; E2 of, measuring the UE selecting a cell capable of receiving UE a handover preparation for all SAE bearer reported signal quality as the best cell handover preparation is preferably a cell, the source eNB determines handover Replied handover preparation request response exists preferred cell-cell handover preparation message.
5.根据权利要求1或2中所述的小区切换方法,其特征在于,步骤E中所述源eNB在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,包括:E1、在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有SAE承载的切换准备小区,是则执行步骤E2,否则执行步骤E3 ;E2、在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;E3、判断待切换的UE是否有保证比特率GBR业务,是则执行步骤E4,否则执行步骤E5 ;E4、在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有GBR业务承载的切换准备小区;是则,在能够接纳UE的所有GBR业务承载的切换准备小区中选择UE测量上报 5. The cell according to claim 1 or claim 2 handover method, wherein, in step E the source eNB determines whether there has been preferred cell handover preparation response message reply to the handover request handover preparation in a cell, comprising: E1, has been reply handover request response message of the handover preparation cell, it is determined whether or not there all handover preparation cells SAE bearer capable of receiving UE, if yes, performing step E2 of, otherwise step E3; E2, capable of receiving a UE all SAE bearer handover preparation selected cell reported by the UE measures signal quality as the best cell handover preparation is preferably a cell, the source eNB determines handover preparation is preferably present in the cell has returned to the handover request response message in a cell handover preparation; E3, is determined to be switched whether the UE has a guaranteed bit rate GBR traffic, is the step E4, otherwise step E5; E4, has been reply handover request response message of the handover preparation cell, it is determined whether there is handover preparation capable of receiving a UE all GBR traffic bearers cell; if yes, select UE measurement reporting in a UE capable of receiving a handover preparation for all cell GBR traffic bearer 信号质量最好的小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;否则,源eNB判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区;E5、在能够接纳UE的承载数最多的切换准备小区中选择UE测量上报信号质量最好的切换准备小区作为较佳切换准备小区,源eNB判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;否则,源eNB判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 The best signal quality as the preferred cell handover preparation cell, the source eNB determines handover preparation is preferably present in the cell has returned to the handover request response message cell handover preparation; otherwise, the source eNB determines handover preparation has been restored in the handover request response message preferred cell handover preparation is not present in the cell; E5, the number of UE capable of receiving a maximum load of handover preparation UE measurement report cell selecting the best signal quality as the preferred cell handover preparation ready cell handover, the source eNB determines Replied present preferred cell handover preparation handover preparation cell handover request response message; otherwise, the source eNB determines handover preparation is preferably not present in the cell has returned to the handover request response message in a cell handover preparation.
6. 一种基站eNB,其特征在于,包括:收发单元、切换准备定时器和控制单元;所述收发单元,用于在控制单元的控制下接收来自用户设备UE的测量上报和来自各个切换准备小区所属的准备eNB的切换请求响应消息并传送给控制单元,接收来自控制单元的切换请求消息并发送给各个切换准备小区所属的准备eNB,接收来自控制单元的切换命令并发送给UE ;所述切换准备定时器,用于在控制单元的控制下启动或关闭,在定时器时间到达时向控制单元发送超时消息;所述控制单元,用于接收来自收发单元的UE的测量上报,根据UE的测量上报和自身的配置信息做出切换决策,确定切换准备小区列表;生成切换请求消息并发送给收发单元,启动切换准备定时器;在未收到来自切换准备定时器的超时消息时,控制收发单元接收切换请求响应消息,每次接收到切换准备 A base station the eNB, characterized by comprising: a transceiver unit, a control unit and a timer handover preparation; the transceiver unit is configured to receive measurements from the user equipment UE under the control of the control unit and from each reporting handover preparation cell belongs eNB handover preparation request response message and transmitted to the control unit, the control unit receives from the handover request message and sends the handover preparation prepared eNB each cell belongs to, receiving a handover command from the control unit sends the UE; the handover preparation timer for starting under the control of the control unit on or off, send the timeout message to the timer control means the arrival times; the control unit, for receiving UE measurement reporting from the transceiver unit, according to the UE's measurement reporting configuration information itself and makes a handover decision, determining a switching cell list preparation; generating a handover request message sent to the transceiver unit, a timer starts handover preparation; the message is not received from the handover preparation time out timer, controls the transceiver unit receives the handover request response message, each receiving the handover preparation 区的切换请求响应消息后,判断发送该切换请求响应消息的切换准备小区是否为最佳切换准备小区,如果是,将该切换准备小区作为此次切换的切换目标小区生成切换命令发送给收发单元并控制收发单元停止接收切换请求响应消息,否则,控制收发单元继续接收切换请求响应消息;在收到来自切换准备定时器的超时消息后,在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区, 如果是,将该切换准备小区作为此次切换的切换目标小区生成切换命令发送给收发单元, 否则,判定切换准备失败。 After the handover region in response to the request message, sending the handover request is determined in response to whether the handover preparation message cell is the best cell handover preparation, if so, the handover preparation the cell as a handover target cell generates a handover command to switch the transceiver unit the control unit and the transceiver stops receiving the handover request response message, otherwise, the control continues to the transceiver unit receives the handover request response message; after receiving the handover preparation message from the timeout timer has replied in the handover request response message is determined whether the cell handover preparation present preferred cell handover preparation, if so, the handover preparation the cell as a handover target cell generates a handover command to the switching transceiver, otherwise, determines that the handover preparation failure.
7.根据权利要求6所述的eNB,其特征在于,所述控制单元,进一步用于在未收到来自切换准备定时器的超时消息时,判断是否接收到所有切换准备小区通过所属的准备eNB回复的切换请求响应消息,如果接收到所有切换准备小区回复的切换请求响应消息,在已回复切换请求响应消息的切换准备小区中判断是否存在较佳切换准备小区,如果是,将该切换准备小区作为此次切换的切换目标小区生成切换命令发送给收发单元,否则,判定切换准备失败,如果没有接收到所有切换准备小区回复的切换请求响应消息,控制收发单元继续接收切换请求响应消息。 7. The eNB according to claim 6, wherein said control means is further configured to time-out message is not received from the handover preparation timer, determines whether all the received handover preparation prepared by cell belongs eNB reply handover request response message, if the received reply to all the switching cell handover preparation request response message, the handover request reply has been determined in the handover preparation response message whether there is preferred a cell handover preparation cell, if it is, the cell handover preparation as the handover target cell generates a handover command to the switching transceiver, otherwise, it determines that a handover preparation fails, if no cells receive all handover preparation request response message reply handover, controls the transceiver unit continues to receive the handover request response message.
8.根据权利要求6或7所述的eNB,其特征在于,所述控制单元,用于判断发送该切换请求响应消息的切换准备小区是否在UE测量上报中信号质量最好并且接纳了UE的所有系统架构演进SAE承载,如果是,则判断该小区为最佳切换准备小区,否则,判断该小区不是最佳切换准备小区。 The eNB 6 or claim 7, wherein said control unit for transmitting the handover request determines whether the handover preparation response message reporting the cell measurement the best signal quality at the UE and the UE receiving the All system architecture Evolution SAE bearer, if so, determining whether the cell is the best cell handover preparation, otherwise, determining that the cell is not the best cell handover preparation.
9.根据权利要求6或7所述的eNB,其特征在于,所述控制单元,用于在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有SAE承载的切换准备小区;如果存在能够接纳UE的所有SAE承载的切换准备小区,在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;如果不存在能够接纳UE的所有SAE承载的切换准备小区,判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 9. The eNB 6 or claim 7, wherein said control means is configured to respond to the handover request response message cell handover preparation, it is determined whether there is handover preparation capable of receiving all the SAE bearers of the UE cells; cell if the handover preparation capable of receiving all the SAE bearers of the UE exists, the UE measures the selected cell handover preparation capable of receiving all the SAE bearers of the UE reports the best signal quality as the preferred cell-cell handover preparation, it is determined in Replied present preferred cell handover preparation cell handover preparation message in response to the handover request; handover preparation if cell capable of receiving all the SAE bearers of the UE does not exist, determines the preferred handover preparation does not exist in the handover request response message has returned to the cell handover preparation district.
10.根据权利要求6或7所述的eNB,其特征在于,所述控制单元,用于在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有SAE承载的切换准备小区;如果存在能够接纳UE的所有SAE承载的切换准备小区,在能够接纳UE的所有SAE承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区;如果不存在能够接纳UE的所有SAE承载的切换准备小区,判断UE是否有保证比特率GBR业务;如果UE有GBR业务,在已回复切换请求响应消息的切换准备小区中,判断是否存在能够接纳UE的所有GBR业务承载的切换准备小区;如果是,在能够接纳UE的所有GBR业务承载的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响 10. eNB 6 or claim 7, wherein said control means is configured to respond to the handover request response message cell handover preparation, it is determined whether there is handover preparation capable of receiving all the SAE bearers of the UE cells; cell if the handover preparation capable of receiving all the SAE bearers of the UE exists, the UE measures the selected cell handover preparation capable of receiving all the SAE bearers of the UE reports the best signal quality as the preferred cell-cell handover preparation, it is determined in Replied present preferred cell handover preparation cell handover preparation message in response to the handover request; handover preparation if cell capable of receiving all the SAE bearers of the UE does not exist, it is determined whether the UE is guaranteed bit rate GBR services; if the UE has GBR traffic in Replied handover request response handover preparation cell message, it is determined whether there is handover preparation cell capable of receiving a UE all GBR traffic bearer; if yes, select the handover preparation cell capable of receiving a UE all GBR traffic bearer UE measurement reporting signal quality of the most good cell handover preparation as a preferred cell, is determined in response to a request to switch Replied 应消息的切换准备小区中存在较佳切换准备小区,否则,判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区;如果UE没有GBR业务,在能够接纳UE的承载数最多的切换准备小区中选择UE测量上报信号质量最好的小区作为较佳切换准备小区,判定在已回复切换请求响应消息的切换准备小区中存在较佳切换准备小区,否则,判定在已回复切换请求响应消息的切换准备小区中不存在较佳切换准备小区。 If the UE is not the number of bearer GBR services, a UE capable of receiving; cell handover preparation message should be present in the preferred cell handover preparation, otherwise, it determines the preferred handover preparation is not present in the cell has returned to the handover request response message in a cell handover preparation most cell handover preparation selected UE measurement reporting signal quality as the best cell handover preparation is preferably a cell, a cell determines that there has been the preferred handover preparation response message reply to the handover request handover preparation cell, otherwise, determines that the handover has been restored cell handover preparation request response preferred absence cell handover preparation message.
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