WO2011130990A1 - 基站切换中无线资源连接重建立拒绝的方法、系统和装置 - Google Patents
基站切换中无线资源连接重建立拒绝的方法、系统和装置 Download PDFInfo
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- WO2011130990A1 WO2011130990A1 PCT/CN2010/077186 CN2010077186W WO2011130990A1 WO 2011130990 A1 WO2011130990 A1 WO 2011130990A1 CN 2010077186 W CN2010077186 W CN 2010077186W WO 2011130990 A1 WO2011130990 A1 WO 2011130990A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/18—Management of setup rejection or failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/20—Interfaces between hierarchically similar devices between access points
Definitions
- the present invention belongs to the field of wireless communication switching technologies, and in particular, to a method and apparatus for a Radio Resource Connection Reestablish by an evolved base station (eNB) in an LTE (Long Term Evolution) system.
- eNB evolved base station
- LTE Long Term Evolution
- the handover between the eNBs also includes X2 interface switching (referred to as X2 switching) and S1 interface switching (referred to as S1 switching).
- the handover source side decides that handover is required according to the measurement report of the user equipment (UE, User Equipment)
- the handover request (Handover Request) command is sent to the handover target side (referred to as the target) eNB through the X2 interface.
- the target eNB After receiving the Handover Request command, the target eNB prepares resources for completing the handover at the local eNB.
- the source eNB sends a Handover Request message to the eNB through the S1 interface, and then the eNB sends a Handover Request message to the target eNB to notify the target eNB to prepare for the handover. In order for the target eNB to prepare resources for handover.
- the UE may send a radio resource connection (RRC) re-establishment request to the target eNB due to a link failure or the like, for the X2 handover or the S1 handover.
- RRC radio resource connection
- an RRC Connection Reestablish Reject message is sent to the UE; after receiving the message, the UE enters an IDLE state. If the target eNB generates an exception when it continues to prepare to switch resources, it sends a Handover Prepare Failure message to the source eNB, and after receiving the information, the source eNB suspends the current handover. Regress the resources.
- RRC radio resource connection
- the source eNB receives the Handover sent by the target eNB in step 306.
- the source eNB Since the UE has entered the IDLE state, the source eNB also considers that the UE is in the connected state (Connected), resulting in an inactivity on the source eNB side.
- the UE that is, the resource of the UE is suspended, can only wait for the source eNB to detect that the UE is inactive (ie, User Inactive), and this is related to the timer set by the eNB for the detection. If the timer is set for a long period of time, such as 30 minutes or longer, the eNB cannot release UE resources in time and waste resources, which is not conducive to access by other UEs, especially when there are multiple users of large traffic. Directly affect the user's use and satisfaction with the system.
- the technical problem to be solved by the present invention is to provide a method and system for reestablishing radio resource connection reestablishment in a base station handover. After the target eNB prepares handover resources and rejects the RRC reestablishment request of the UE, the source eNB releases the UE resources in time.
- the present invention provides a radio resource connection (RRC) re-establishment rejection in an evolved base station (eNB) handover, involving a user equipment (UE), a handover source eNB, and a target eNB, and the method includes:
- the target eNB After the target eNB rejects the RRC connection re-establishment request of the UE in the handover resource preparation phase, the target eNB sends a message to notify the source eNB that the RRC connection re-establishment rejection of the UE occurs.
- the method also includes:
- the source eNB learns the notification of the target eNB, the resource of the UE is released.
- the method further includes a mobility management entity (MME), the handover is a handover of an inter-eNB X2 interface, and the method further includes: before performing the sending message to notify the source eNB that a RRC connection reestablishment rejection of the UE occurs, the method further includes :
- MME mobility management entity
- the reason for the failure is increased in the wireless network layer cause of the X2 interface protocol: RRC connection re-establishment rejection.
- the step of the target eNB sending a message to notify the source eNB that the RRC connection re-establishment rejection of the UE has occurred includes: after the target eNB rejects the RRC connection re-establishment request of the UE, sending a handover preparation failure to the source eNB Message, and the reason value of the failure is set to the RRC connection re-establishment rejection;
- the step of releasing the resources of the UE includes:
- the source eNB sends a UE context release request message to the MME according to the cause of the failure in the handover preparation failure message, and requests the UE to release the context.
- the MME After receiving the UE context release request message, the MME returns a context release command to the source eNB;
- the source eNB After receiving the context release command of the MME, the source eNB releases the resources related to the UE.
- the method further includes a mobility management entity (MME), where the handover is a handover of an S1 interface between an eNB and an MME; before performing the sending message to notify the source eNB that a RRC connection re-establishment rejection of the UE occurs, the foregoing
- MME mobility management entity
- the reason for the failure is increased in the wireless network layer cause of the S1 interface protocol: RRC connection reestablishment.
- the step of the target eNB sending a message to notify the source eNB that the RRC connection re-establishment rejection of the UE occurs includes:
- the target eNB After the target eNB rejects the RRC connection reestablishment request of the UE, the target eNB sends a handover failure message to the MME, and the failure cause value is set as the RRC connection re-establishment rejection;
- the MME After receiving the handover failure message, the MME rejects sending the UE context release command to the source eNB according to the cause value.
- the present invention provides a system for reestablishing a radio resource connection (RRC) re-establishment rejection in an evolved base station (eNB) handover, including a user equipment (UE), a source eNB of handover, and a target eNB, where:
- the UE is configured to: when detecting a link abnormality in the handover process, send an RRC connection reestablishment request to the handover cell of the target eNB;
- the target eNB is configured to: after the RRC connection reestablishment request of the UE is rejected in the handover resource preparation phase, send a message to notify the source eNB that the RRC connection reestablishment rejection of the UE occurs;
- the source eNB is configured to release the resources of the UE after obtaining the notification of the target eNB.
- the system also includes a Mobility Management Entity (MME);
- MME Mobility Management Entity
- the handover is the handover of the X2 interface between the eNBs
- the reason for the failure is increased in the wireless network layer of the X2 interface protocol: RRC connection re-establishment rejection;
- the handover is the handover of the S1 interface between the eNB and the MME
- the cause of the failure is increased in the wireless network layer cause of the S1 interface protocol: RRC connection re-establishment rejection.
- the handover is a handover of an X2 interface between the eNBs
- the target eNB is configured to: after the RRC connection re-establishment request of the UE is rejected, send a handover preparation failure message to the source eNB, and the failure cause value is set as the RRC connection re-establishment rejection;
- the source eNB is configured to: send, according to a cause of failure in the handover preparation failure message, the RRC connection re-establishment rejection, send a UE context release request message to the MME, and receive the UE returned by the MME Release the UE-related resources after the context release command;
- the MME is configured to: return a context release command to the source eNB after receiving the UE context release request message.
- the handover is a handover of an S1 interface between an eNB and an MME;
- the target eNB is configured to: after rejecting the RRC connection reestablishment request of the UE, send a handover failure message to the MME, and the failure cause value is set as the RRC connection re-establishment rejection; the MME is set as: After receiving the handover failure message, according to the cause value, the RRC connection Re-establishing a refusal to send a UE context release command to the source eNB;
- the source eNB is configured to: release the related resources of the UE after receiving the UE context release command.
- the present invention also provides an eNB, which includes a notification module and a resource release module.
- the notification module is configured to: when the eNB is the target eNB in the handover, reject the RRC connection re-establishment request of the UE in the handover resource preparation phase. Afterwards, the message is sent in time to notify the source eNB that the RRC connection re-establishment rejection of the UE occurs;
- the resource release module is configured to: when the eNB is used as the source eNB in the handover, after the target eNB learns to reject the RRC connection re-establishment request of the UE in the handover resource preparation phase, the resource of the UE is released.
- the handover is a handover of an X2 interface between the eNBs
- the notification module is configured to: after the eNB as the target eNB in the handover, reject the RRC connection re-establishment request of the UE, send a handover preparation failure message to the source eNB, and the cause value of the failure is set to the RRC connection re-establishment rejection;
- the resource release module is configured to: when the eNB is in the handover as the source eNB, after receiving the handover preparation failure message sent by the target eNB, the value of the failure in the handover preparation failure message is the RRC connection. Reestablishing the refusal, sending a UE context release request message to the MME, and releasing the UE-related resources after receiving the UE context release command returned by the MME.
- the handover is a handover of an S1 interface between the eNBs
- the notification module is configured to: when the eNB is the target eNB in the handover, reject the RRC connection re-establishment request of the UE, send a handover failure message to the MME, and the failure cause value is set to the RRC connection re-establishment Rejecting, instructing the MME to send a UE context release command to the source eNB;
- the resource release module is configured to: when the eNB is the source eNB in the handover, release the UE-related resource after receiving the UE context release command sent by the MME.
- the present invention provides a method, system and apparatus for rejecting RRC re-establishment in an eNB handover provided by an LTE system, since the handover target eNB rejects the RRC re-establishment request of the UE in the handover resource preparation phase. Then, the message is sent to notify the source eNB to request the UE to re-establish the RRC reject, thereby ensuring that the source eNB quickly releases the UE resources and improves the resource utilization, thereby improving the user experience and increasing the user in the large traffic multi-user scenario. Satisfaction with use. BRIEF abstract
- FIG. 1 is a schematic diagram of information interaction between eNBs directly through an X2 interface
- FIG. 2 is a schematic diagram of indirect information exchange between the eNBs through the S1 interface of the MME;
- FIG. 3 is a process diagram of the current RRC re-establishment rejection in the eNB handover;
- FIG. 4 is a RRC re-establishment rejection in the eNB handover according to the present invention.
- FIG. 5 is a flow chart of another embodiment of a method for implementing RRC re-establishment rejection in an eNB handover according to the present invention.
- An embodiment of the method for reestablishing a radio resource connection (RRC) re-establishment in an evolved base station (eNB) handover includes:
- the target eNB of the handover rejects the RRC reestablishment request of the user equipment (UE) in the handover resource preparation phase
- the source eNB sends a message to notify the handover that the UE requests the RRC reestablishment rejection.
- the source eNB learns the notification of the target eNB, the resource of the UE is released in time.
- This embodiment shows a process in which the source eNB can quickly release the UE resources after receiving the RRC re-establishment request of the UE and rejecting the eNB, when the eNB performs the X2 handover, as shown in FIG.
- the process includes the following steps:
- Step 401 The source eNB1 determines that an X2 handover is required, and sends the X2 interface to the target eNB.
- Step 402 After receiving the Handover Request message, the target eNB performs preparation for switching resources.
- Step 403 The UE detects a link abnormality, and the like, and sends an RRC Connection Reestablish Request message to the handover cell of the target eNB.
- Step 404 The target eNB fails to perform the RRC link re-establishment operation because the resource is being prepared, so the RRC Connection Reestablish Reject message is returned to the UE.
- Step 405 The target eNB sends a Handover Prepare Failure message to the source eNB, where the failure cause value is an RRC Connection Reestablish Reject (RRC Connection Reestablish Reject);
- the cause value Since the cause value is not included in the Radio Network Layer Cause of the 36.423 protocol of the X2 interface, the cause value needs to be added to notify the source side and the target side of the switch that the resource preparation phase has occurred.
- the UE requests rejection of the RRC re-establishment.
- Step 406 After receiving the Handover Prepare Failure message, the source eNB re-establishes the RRC connection re-establishment according to the cause value, and immediately sends an Initial Ue Context Release Request message to the MME to request release of the UE context.
- Step 408 After receiving the command, the source eNB immediately releases the UE related resources.
- the target eNB In the process of performing the X2 handover by the eNB, the target eNB immediately informs the source eNB that the RRC re-establishment rejection occurs after receiving the RRC re-establishment request message of the UE and sending the RRC connection re-establishment rejection message in the resource preparation process.
- Source eNB quickly releases UE related resources The source does not need to wait for the user to be inactivated (User Inactive), thereby improving the user access rate and resource utilization, and also reducing the CPU resource occupancy rate of the source eNB.
- This embodiment shows a process in which the source eNB can quickly release the UE resources after receiving the RRC re-establishment request of the UE and rejecting the eNB, when the eNB is ready to switch resources, in the S1 handover process, as shown in FIG.
- the process includes the following steps:
- Step 501 The source eNB determines that an S1 handover is required, and sends a Handover Required message to the MME by using the S1 interface.
- Step 502 The MME sends a Handover Request message to the target eNB, instructing the target eNB to prepare resources for switching.
- Step 503 After receiving the Handover Request message, the target eNB performs preparation for switching resources.
- Step 504 The UE detects a link abnormality, and the like, and sends an RRC Connection Reestablish Request message to the handover cell of the target eNB.
- Step 505 The target eNB fails to perform the re-establishment of the RRC link because the resource is being prepared, so the RRC Connection Reestablish Reject message is returned to the UE.
- Step 506 The target eNB sends a Handover Failure message to the MME. RRC Connection Reestablish Reject for RRC Connection;
- the cause value needs to be added to it.
- Step 507 After receiving the Handover Failure message, the MME sends a UE Context Release Command (Initial Ue Context Release Command) to the source eNB according to the cause value, indicating that the source eNB releases the UE resource.
- a UE Context Release Command Initial Ue Context Release Command
- Step 508 After receiving the command, the source eNB releases the UE resource.
- the UE resources are released in time, and the source eNB is not required to wait for user inactivity detection, thereby improving user access rate and resource utilization, and reducing the source eNB. CPU resource usage.
- the present invention is directed to the foregoing method embodiments, and correspondingly provides a system embodiment of a radio resource connection (RRC) re-establishment rejection in an evolved base station (eNB) handover, including a user equipment (UE), a source eNB and a target eNB, where:
- RRC radio resource connection
- the UE is configured to send an RRC re-establishment request message to the handover cell of the target eNB when the link abnormality is detected during the handover process;
- the target eNB is configured to send a message to notify the source eNB of the handover that the UE requests the RRC re-establishment rejection after the RRC re-establishment request of the UE is rejected in the phase of preparing the handover resource.
- the source eNB is configured to release the resources of the UE in time after obtaining the notification of the target eNB.
- the present invention further provides the following specific implementation manner for X2 handover or S1 handover between eNBs.
- the system embodiment further includes a mobility management entity (MME): the target eNB replies to the UE with an RRC connection re-establishment rejection (RRC) in preparation for handover of resources.
- MME mobility management entity
- RRC RRC connection re-establishment rejection
- the source eNB After receiving the Handover Prepare Failure message, the source eNB sends a UE Context Release Request message to the RRC connection re-establishment rejection according to the cause value, requesting release of the UE context.
- the MME is configured to send a context release command (Initial Ue Context Release Command) to the source eNB;
- the source eNB After receiving the command from the MME, the source eNB immediately releases the UE related resources.
- the system embodiment further includes a mobility management entity (MME): the target eNB replies to the UE with an RRC connection re-establishment rejection (RRC) in preparation for handover of resources.
- RRC RRC connection re-establishment rejection
- the Connection Reestablish Reject message and sends a Handover Failure message to the MME, the reason value is RRC Connection Reestablish Reject (RRC Connection Reestablish Reject);
- the MME after receiving the Handover Failure message, sends a UE Context Release Command (Initial Ue Context Release Command) to the source eNB according to the cause value, indicating that the source eNB releases the UE resource;
- a UE Context Release Command Initial Ue Context Release Command
- the source eNB After receiving the command from the MME, the source eNB releases the UE resource.
- the present invention also provides an eNB, including a notification module and a resource release module;
- the notification module is configured to: when the eNB is used as the target eNB in the handover, after the RRC connection re-establishment request of the user equipment (UE) is rejected in the handover resource preparation phase, send a message to notify the source eNB that the RRC connection of the UE occurs. Re-establish refusal;
- the resource release module is configured to: when the eNB is used as the source eNB in the handover, after the target eNB learns to reject the RRC connection re-establishment request of the UE in the handover resource preparation phase, releasing the resource of the UE.
- the notification module is configured to send, after the eNB, the target eNB in the handover, that the RRC connection re-establishment request of the UE is rejected, send a handover preparation failure message to the source eNB, and the failure cause value is set to the RRC. Connection re-establishment rejection;
- the resource release module is configured to: when the eNB is in the handover as the source eNB, after receiving the handover preparation failure message sent by the target eNB, the cause of the failure in the handover preparation failure message is the RRC connection weight. Establishing a rejection, sending a UE context release request message to the mobility management entity (MME), and releasing the UE-related resources after receiving the UE context release command returned by the MME.
- MME mobility management entity
- the notification module is configured to: after the eNB as the target eNB in the handover, reject the RRC connection re-establishment request of the UE, send a handover failure message to the MME, and the failure cause value is set as the RRC connection re-establishment rejection.
- the resource release module is configured to: when the eNB is used as the source eNB in the handover, release the UE-related resource after receiving the UE context release command sent by the MME.
- the present invention is a method and system for rejecting RRC re-establishment in an eNB handover provided by an LTE system.
- the handover target eNB rejects the RRC connection re-establishment request of the UE in the handover resource preparation phase
- the UE sends a message in time to notify the source eNB that the RRC of the UE has occurred.
- the connection re-establishment request rejection is performed, thereby ensuring that the source eNB quickly releases the UE resources and improves the resource utilization, thereby improving the user experience in a large traffic multi-user scenario and increasing the user satisfaction.
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Abstract
本发明披露了一种基站切换中无线资源连接重建立拒绝的方法和系统,其中方法涉及UE、切换的源eNB和目标eNB,该方法包括:当目标eNB在切换资源准备阶段将UE的RRC连接重建立请求拒绝后,及时发送消息通知源eNB发生了UE的RRC连接重建立拒绝。源eNB在获知目标eNB的通知后,释放该UE的资源。本发明保证了当目标eNB在将UE的RRC连接重建立请求拒绝后源eNB能快速释放UE资源,从而提高资源的利用率。
Description
基站切换中无线资源连接重建立拒绝的方法、 系统和装置
技术领域
本发明属于无线通讯切换技术领域,尤其涉及长期演进(LTE, Long Term Evolution )系统中演进基站( eNB, Evolution NodeB )切换拒绝无线资源连接 重建立 ( Radio Resource Connection Reestablish ) 的方法和装置。
背景技术
eNB之间的信息交互通常有两种接口方式, 一种是直接通过 X2接口进 行信息交互, 如图 1 所示; 另一种则是先通过 S1 接口与移动性管理实体 ( MME, Mobility Management Entity )通讯, 并通过该 MME间接地实现 eNB 间的信息交互, 如图 2所示。 因此, eNB之间的切换也就包含 X2接口切换 (简称 X2切换)和 S1接口切换(简称 S1切换) 。
对于 X2切换, 切换源侧(简称源)根据用户设备 ( UE, User Equipment ) 的测量报告判决需要进行切换时, 会通过 X2接口向切换目标侧 (简称目标) eNB发送切换请求(Handover Request )命令, 目标 eNB 收到该 Handover Request命令后, 会在本 eNB准备用以完成此次切换的资源。
对于 S1切换, 源 eNB根据 UE的测量报告判决需要进行切换时, 通过 S1接口向 MME发送切换要求( Handover Required ) 消息后, MME通过 S1 接口向目标 eNB发送 Handover Request消息, 通知目标 eNB准备切换, 以便 目标 eNB准备进行切换的资源。
不论是对于 X2切换还是对于 S1切换, 在目标 eNB准备切换资源时, UE可能由于链路失败等原因向目标 eNB发送无线资源连接 ( RRC, Radio Resource Connection )重建立请求; 此时, 由于目标 eNB正在准备切换资源 而无法进行 RRC重建立,便会向 UE发送 RRC连接建立拒绝( RRC Connection Reestablish Reject ) 消息; UE收到该消息后, 会进入空闲 ( IDLE )状态。 如 果目标 eNB在继续准备切换资源时发生异常,会向源 eNB发送切换准备失败 ( Handover Prepare Failure ) 消息, 源 eNB收到该信息后, 会中止当前切换,
进行资源的回退。 上述处理过程如图 3所示。
发明内容
在图 3的处理过程中,在步骤 306源 eNB收到目标 eNB发送的 Handover
Prepare Failure后虽然回退了 UE资源, 但仍存在这样的问题: 由于 UE已经 进入了 IDLE状态, 但是源 eNB还会认为 UE处在连接状态 ( Connected ) , 导致了在源 eNB侧有一个不活动的 UE, 即该 UE的资源被挂起,此时只能等 待该源 eNB检测到该 UE不活动 (即 User Inactive ) , 而这与该 eNB设置的 用于该检测的定时器有关。 如果定时器设置时间较长, 如 30分钟或更长, 会 使该 eNB不能及时释放 UE资源而造成资源浪费, 从而不利于其它 UE的接 入, 尤其是在大话务多用户时, 将会直接影响用户的使用及对于系统的满意 度。
本发明所要解决的技术问题是提供一种基站切换中无线资源连接重建拒 绝的方法和系统,能够在目标 eNB准备切换资源而对 UE的 RRC重建请求拒 绝后, 使得源 eNB及时释放 UE资源。
为了解决上述技术问题, 本发明提供了一种演进基站(eNB )切换中无 线资源连接(RRC )重建立拒绝的方法, 涉及用户设备(UE )、切换的源 eNB 和目标 eNB, 该方法包括:
当所述目标 eNB在切换资源准备阶段将所述 UE的 RRC连接重建立请求 拒绝后, 及时发送消息通知所述源 eNB发生了 UE的 RRC连接重建立拒绝。
该方法还包括:
所述源 eNB在获知所述目标 eNB的通知后, 释放该 UE的资源。
该方法还涉及移动性管理实体 ( MME ) , 所述切换为 eNB间 X2接口的 切换;在执行所述发送消息通知所述源 eNB发生了 UE的 RRC连接重建拒绝 的步骤前, 上述方法还包括:
在 X2接口协议的无线网络层原因中增加失败的原因值: RRC连接重建 立拒绝。
所述目标 eNB发送消息通知所述源 eNB发生了 UE的 RRC连接重建立 拒绝的步骤包括: 所述目标 eNB将所述 UE的 RRC连接重建立请求拒绝后, 向所述源 eNB发送切换准备失败消息, 且失败的原因值设为所述 RRC连接 重建立拒绝;
所述源 eNB在获知所述目标 eNB的通知后 ,释放该 UE的资源的步骤包 括:
所述源 eNB根据所述切换准备失败消息中失败的原因值为所述 RRC连 接重建立拒绝, 向所述 MME发送 UE上下文释放请求消息, 请求对 UE上下 文的释放;
所述 MME收到所述 UE上下文释放请求消息后向源 eNB返回上下文释 放命令;
所述源 eNB收到 MME的所述上下文释放命令后, 释放所述 UE相关的 资源。
该方法还涉及移动性管理实体 ( MME ) , 所述切换为 eNB与 MME间 S1接口的切换; 在执行所述发送消息通知所述源 eNB发生了 UE的 RRC连 接重建立拒绝的步骤前, 上述方法还包括:
在 S1接口协议的无线网络层原因中增加失败的原因值: RRC连接重建 立拒绝。
所述目标 eNB发送消息通知所述源 eNB发生了 UE的 RRC连接重建立 拒绝的步骤包括:
所述目标 eNB将所述 UE的 RRC连接重建请求拒绝后,向所述 MME发 送切换失败消息, 且失败的原因值设为所述 RRC连接重建立拒绝;
所述 MME收到该切换失败消息后,根据原因值为所述 RRC连接重建立 拒绝向所述源 eNB发送 UE上下文释放命令;
所述源 eNB在获知所述目标 eNB的通知后,释放该 UE的资源的步骤包 括: 所述源 eNB收到所述 UE上下文释放命令后释放该 UE的相关资源。
为了解决上述技术问题, 本发明提供了一种演进基站(eNB )切换中无 线资源连接(RRC )重建立拒绝的系统, 包括用户设备(UE )、切换的源 eNB 和目标 eNB , 其中:
所述 UE设置为: 在切换过程中检测到链路异常时, 向所述目标 eNB的 切换小区发送 RRC连接重建请求;
所述目标 eNB设置为:在切换资源准备阶段将所述 UE的 RRC连接重建 立请求拒绝后,及时发送消息通知所述源 eNB发生了 UE的 RRC连接重建立 拒绝;
所述源 eNB设置为:在获知所述目标 eNB的通知后,释放该 UE的资源。 该系统还包括移动性管理实体(MME ) ;
若所述切换为 eNB间 X2接口的切换, 则在 X2接口协议的无线网络层 原因中增加失败的原因值: RRC连接重建立拒绝;
若所述切换为 eNB与 MME间 S1接口的切换, 则在 S1接口协议的无线 网络层原因中增加失败的原因值: RRC连接重建立拒绝。
所述切换为 eNB间 X2接口的切换;
所述目标 eNB是设置为: 将所述 UE的 RRC连接重建立请求拒绝后, 向 所述源 eNB发送切换准备失败消息, 且失败的原因值设为所述 RRC连接重 建立拒绝;
所述源 eNB是设置为: 根据所述切换准备失败消息中失败的原因值为所 述 RRC连接重建立拒绝, 向所述 MME发送 UE上下文释放请求消息, 并在 收到所述 MME返回的 UE上下文释放命令后释放所述 UE相关的资源;
所述 MME设置为: 收到所述 UE上下文释放请求消息后向源 eNB返回 上下文释放命令。
所述切换为 eNB与 MME间 S1接口的切换;
所述目标 eNB是设置为: 将所述 UE的 RRC连接重建请求拒绝后, 向所 述 MME发送切换失败消息 ,且失败的原因值设为所述 RRC连接重建立拒绝; 所述 MME设置为: 收到该切换失败消息后, 根据原因值为所述 RRC连
接重建立拒绝向所述源 eNB发送 UE上下文释放命令;
所述源 eNB是设置为: 收到所述 UE上下文释放命令后释放该 UE的相 关资源。
本发明还提供了一种 eNB , 其包括通知模块和资源释放模块; 所述通知模块设置为: 当所述 eNB在切换中作为目标 eNB , 在切换资源 准备阶段将 UE的 RRC连接重建立请求拒绝后,及时发送消息通知源 eNB发 生了 UE的 RRC连接重建立拒绝;
所述资源释放模块设置为: 当所述 eNB在切换中作为源 eNB时,在获知 目标 eNB在切换资源准备阶段将 UE的 RRC连接重建立请求拒绝后,释放该 UE的资源。
所述切换为 eNB间 X2接口的切换;
所述通知模块是设置为: 当所述 eNB在切换中作为目标 eNB , 将 UE的 RRC连接重建立请求拒绝后, 向所述源 eNB发送切换准备失败消息,且失败 的原因值设为所述 RRC连接重建立拒绝;
所述资源释放模块是设置为: 当所述 eNB在切换中作为源 eNB时,接收 到目标 eNB发送的切换准备失败消息后, 根据所述切换准备失败消息中失败 的原因值为所述 RRC连接重建立拒绝, 向 MME发送 UE上下文释放请求消 息,并在收到所述 MME返回的 UE上下文释放命令后释放所述 UE相关的资 源。
所述切换为 eNB间 S1接口的切换;
所述通知模块是设置为: 当所述 eNB在切换中作为目标 eNB , 将 UE的 RRC连接重建立请求拒绝后, 向 MME发送切换失败消息, 且失败的原因值 设为所述 RRC连接重建立拒绝 ,指示所述 MME向源 eNB发送 UE上下文释 放命令;
所述资源释放模块是设置为: 当所述 eNB在切换中作为源 eNB时,接收 到 MME发送的 UE上下文释放命令后释放所述 UE相关的资源。
本发明为 LTE系统提供的 eNB切换中拒绝 RRC重建立的方法、 系统和 装置,由于切换的目标 eNB在切换资源准备阶段拒绝 UE的 RRC重建立请求
后,及时发送消息通知源 eNB发生了 UE请求重建 RRC拒绝, 由此保证了源 eNB快速释放 UE资源, 提高资源的利用率, 从而在大话务多用户场景下提 升了用户体验, 增加了用户使用的满意度。 附图概述
图 1是 eNB间直接通过 X2接口进行信息交互的示意图;
图 2是 eNB间通过与 MME的 S1接口间接进行信息交互的示意图; 图 3是现行的实现 eNB切换中 RRC重建立拒绝的处理过程图; 图 4是本发明的实现 eNB切换中 RRC重建立拒绝的方法一实施例的流 程图;
图 5是本发明的实现 eNB切换中 RRC重建立拒绝的方法另一实施例的 流程图。
本发明的较佳实施方式
以下结合附图和优选实施例对本发明的技术方案进行详细地阐述。 以下 例举的实施例仅仅用于说明和解释本发明, 而不构成对本发明技术方案的限 制。 本发明技术方案的保护范围当以后附的权利要求为准。
本发明提供的演进基站 (eNB )切换中无线资源连接 ( RRC )重建立拒 绝的方法实施例, 包括:
当切换的目标 eNB在切换资源准备阶段将用户设备( UE ) 的 RRC重建 立请求拒绝后,及时发送消息通知切换的源 eNB发生了 UE请求 RRC重建立 拒绝。
源 eNB获知目标 eNB的通知后, 及时释放该 UE的资源。
本发明根据上述方法实施例,分别针对 eNB间的 X2切换或 S1切换又给 出了以下具体的实施方式。
实施例 1
本实施例表示了 eNB在进行 X2切换时, 目标 eNB在准备切换资源时收 到 UE的 RRC重建立请求并予以拒绝后,使源 eNB能够快速释放 UE资源的 处理过程, 如图 4所示的流程, 包括如下步骤:
步骤 401 , 源 eNBl判决需进行 X2切换, 利用 X2接口向目标 eNB发送
Handover Request消息;
步骤 402 , 目标 eNB收到该 Handover Request消息后, 进行切换资源的 准备;
步骤 403 , UE检测到链路异常等情况, 向目标 eNB的切换小区发送了 RRC连接重建立请求( RRC Connection Reestablish Request ) 消息;
步骤 404,目标 eNB由于正在准备资源而无法进行 RRC链路的重建立工 作, 故向 UE回复 RRC连接重建立拒绝( RRC Connection Reestablish Reject ) 消息;
步骤 405 , 目标 eNB 向源 eNB发送切换准备失败(Handover Prepare Failure ) 消息, 其中失败的原因值是 RRC连接重建立拒绝( RRC Connection Reestablish Reject ) ;
由于 X2接口的 36.423 协议的无线网络层原因 (Radio Network Layer Cause )中尚没有该原因值,故需在其中增加该原因值,用以通知切换的源侧、 目标侧在资源准备阶段发生了对 UE请求 RRC重建立的拒绝。
步骤 406 , 源 eNB收到该 Handover Prepare Failure消息后, 根据原因值 为 RRC连接重建立拒绝 , 立即向 MME发送 UE上下文释放请求( Initial Ue Context Release Request ) 消息, 请求对 UE上下文的释放;
Command ) ;
步骤 408, 源 eNB收到该命令后, 即刻进行 UE相关资源的释放。
在上述 eNB进行 X2切换过程中, 由于目标 eNB在资源准备过程中收到 了 UE的 RRC重建立请求消息并发送 RRC连接重建立拒绝消息后, 立即通 知源 eNB发生了 RRC重建立拒绝, 故可以使得源 eNB快速释放 UE相关资
源, 不需其等待检测用户不活动( User Inactive ) , 由此既提高用户接入率和 资源的利用率, 也减轻了源 eNB的 CPU资源占用率。
实施例 2
本实施例表示了 eNB在进行 S1切换过程中, 目标 eNB在准备切换资源 时收到 UE的 RRC重建立请求并予以拒绝后,使源 eNB能够快速释放 UE资 源的处理过程, 如图 5所示的流程, 包括如下步骤:
步骤 501 , 源 eNB判决需进行 S1切换, 利用 S1接口向 MME发送切换 要求 ( Handover Required ) 消息;
步骤 502 , MME向目标 eNB发送 Handover Request消息,指示目标 eNB 准备资源进行切换;
步骤 503 , 目标 eNB收到该 Handover Request消息后, 进行切换资源的 准备;
步骤 504, UE检测到链路异常等情况, 向目标 eNB的切换小区发送了 RRC连接重建立请求( RRC Connection Reestablish Request ) 消息;
步骤 505 , 目标 eNB因正在准备资源而无法进行 RRC链路的重建立,故 向 UE回复 RRC连接重建立拒绝( RRC Connection Reestablish Reject )消息; 步骤 506 , 目标 eNB向 MME发送 Handover Failure消息,原因值为 RRC 连接重建立拒绝 ( RRC Connection Reestablish Reject ) ;
由于 SI接口的 36.413协议的 Radio Network Layer Cause中尚没有该原因 值, 因此需要在其中增加该原因值。
步骤 507 , MME收到该 Handover Failure消息后, 根据原因值为 RRC重 建立拒绝向源 eNB 发送 UE 上下文释放命令(Initial Ue Context Release Command ) , 指示源 eNB释放 UE资源;
步骤 508, 源 eNB收到该命令后释放该 UE资源。
至此, UE资源得到了及时的释放, 不需源 eNB等待用户不活动 (User Inactive )的检测, 由此既提高用户接入率与资源利用率, 也减轻了源 eNB的
CPU资源占用率。
本发明针对上述方法实施例, 相应地提供了演进基站(eNB )切换中无 线资源连接 ( RRC )重建立拒绝的系统实施例, 包括用户设备 ( UE ) 、 切换 的源 eNB和目标 eNB , 其中:
UE,用于在切换过程中检测到链路异常时, 向目标 eNB的切换小区发送 RRC重建立请求消息;
目标 eNB , 用于在准备切换资源阶段将 UE的 RRC重建立请求拒绝后, 及时发送消息通知切换的源 eNB发生了 UE请求 RRC重建立拒绝;
源 eNB , 用于获知目标 eNB的通知后, 及时释放该 UE的资源。
本发明根据上述系统实施例,分别针对 eNB间的 X2切换或 S1切换又给 出了以下具体的实施方式。
对于 eNB间的 X2切换,该系统实施例还包括移动性管理实体 ( MME ): 目标 eNB在准备切换资源阶段向 UE回复 RRC连接重建立拒绝( RRC
Connection Reestablish Reject ) 消息, 同时向源 eNB 发送切换准备失败 ( Handover Prepare Failure ) 消息, 其中失败的原因值是 RRC连接重建立拒 绝 ( RRC Connection Reestablish Reject ) ;
源 eNB收到该 Handover Prepare Failure消息后,才艮据原因值为 RRC连接 重建立拒绝,立即向 ΜΜΕ发送 UE上下文释放请求( Initial Ue Context Release Request ) 消息, 请求对 UE上下文的释放;
MME, 用于向源 eNB发送上下文释放命令 ( Initial Ue Context Release Command ) ;
源 eNB收到 MME的该命令后 , 即刻进行 UE相关资源的释放。
对于 eNB间的 X2切换,该系统实施例还包括移动性管理实体 ( MME ): 目标 eNB在准备切换资源阶段向 UE回复 RRC连接重建立拒绝(RRC
Connection Reestablish Reject )消息,同时向 MME发送 Handover Failure消息 , 原因值为 RRC连接重建立拒绝( RRC Connection Reestablish Reject ) ;
MME, 用于收到该 Handover Failure消息后, 根据原因值为 RRC连接重 建立拒绝向源 eNB 发送 UE 上下文释放命令(Initial Ue Context Release Command ) , 指示源 eNB释放 UE资源;
源 eNB收到 MME的该命令后释放该 UE资源。
本发明还提供了一种 eNB , 包括通知模块和资源释放模块;
所述通知模块, 用于当所述 eNB在切换中作为目标 eNB , 在切换资源准 备阶段将用户设备(UE ) 的 RRC连接重建立请求拒绝后, 及时发送消息通 知源 eNB发生了 UE的 RRC连接重建立拒绝;
所述资源释放模块,用于当所述 eNB在切换中作为源 eNB时,在获知目 标 eNB在切换资源准备阶段将 UE的 RRC连接重建立请求拒绝后, 释放该 UE的资源。
当所述切换为 eNB间 X2接口的切换时:
所述通知模块, 用于当所述 eNB在切换中作为目标 eNB , 将 UE的 RRC 连接重建立请求拒绝后, 向所述源 eNB发送切换准备失败消息, 且失败的原 因值设为所述 RRC连接重建立拒绝;
所述资源释放模块,用于当所述 eNB在切换中作为源 eNB时,接收到目 标 eNB发送的切换准备失败消息后, 根据所述切换准备失败消息中失败的原 因值为所述 RRC连接重建立拒绝, 向移动性管理实体(MME )发送 UE上 下文释放请求消息 ,并在收到所述 MME返回的 UE上下文释放命令后释放所 述 UE相关的资源。
当所述切换为 eNB间 S1接口的切换时:
所述通知模块, 用于当所述 eNB在切换中作为目标 eNB , 将 UE的 RRC 连接重建立请求拒绝后, 向 MME发送切换失败消息, 且失败的原因值设为 所述 RRC连接重建立拒绝,指示所述 MME向源 eNB发送 UE上下文释放命 令;
所述资源释放模块, 用于当所述 eNB在切换中作为源 eNB时, 接收到 MME发送的 UE上下文释放命令后释放所述 UE相关的资源。
尽管为示例目的, 已经公开了本发明的优选实施例, 本领域的技术人员 将意识到各种改进、 增加和取代也是可能的, 因此, 本发明的范围应当不限 于上述实施例。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
工业实用性
本发明为 LTE系统提供的 eNB切换中拒绝 RRC重建立的方法和系统, 由于切换的目标 eNB在切换资源准备阶段拒绝 UE的 RRC连接重建立请求 后,及时发送消息通知源 eNB发生了 UE的 RRC连接重建立请求拒绝, 由此 保证了源 eNB快速释放 UE资源, 提高资源的利用率, 从而在大话务多用户 场景下提升了用户体验, 增加了用户使用的满意度。
Claims
1、 一种演进基站(eNB )切换中无线资源连接 ( RRC )重建立拒绝的 方法, 该方法涉及用户设备(UE ) 、 切换的源 eNB和目标 eNB, 该方法包 括:
当所述目标 eNB在切换资源准备阶段将所述 UE的 RRC连接重建立请求 拒绝后, 及时发送消息通知所述源 eNB发生了 UE的 RRC连接重建立拒绝。
2、 按照权利要求 1所述的方法, 该方法还包括:
所述源 eNB在获知所述目标 eNB的通知后, 释放该 UE的资源。
3、 按照权利要求 2所述的方法,其中,该方法还涉及移动性管理实体 ( MME ) , 所述切换为 eNB间 X2接口的切换; 在执行所述发送消息通知所 述源 eNB发生了 UE的 RRC连接重建拒绝的步骤前, 所述方法还包括: 在 X2接口协议的无线网络层原因中增加失败的原因值: RRC连接重建 立拒绝。
4、 按照权利要求 3所述的方法, 其中,
所述目标 eNB发送消息通知所述源 eNB发生了 UE的 RRC连接重建立 拒绝的步骤包括:
所述目标 eNB将所述 UE的 RRC连接重建立请求拒绝后,向所述源 eNB 发送切换准备失败消息, 且失败的原因值设为所述 RRC连接重建立拒绝; 所述源 eNB在获知所述目标 eNB的通知后,释放该 UE的资源的步骤包 括:
所述源 eNB根据所述切换准备失败消息中失败的原因值为所述 RRC连 接重建立拒绝, 向所述 MME发送 UE上下文释放请求消息, 请求对 UE上下 文的释放;
所述 MME收到所述 UE上下文释放请求消息后向源 eNB返回上下文释 放命令; 以及
所述源 eNB收到 MME的所述上下文释放命令后, 释放所述 UE相关的 资源。
5、 按照权利要求 2所述的方法, 其中, 该方法还涉及移动性管理实体 ( MME ) , 所述切换为 eNB与 MME间 S1接口的切换; 在执行所述发送消 息通知所述源 eNB发生了 UE的 RRC连接重建立拒绝的步骤前,所述方法还 包括:
在 S1接口协议的无线网络层原因中增加失败的原因值: RRC连接重建 立拒绝。
6、 按照权利要求 5所述的方法, 其中,
所述目标 eNB发送消息通知所述源 eNB发生了 UE的 RRC连接重建立 拒绝的步骤包括:
所述目标 eNB将所述 UE的 RRC连接重建立请求拒绝后, 向所述 MME 发送切换失败消息, 且失败的原因值设为所述 RRC连接重建立拒绝;
所述 MME收到该切换失败消息后,根据原因值为所述 RRC连接重建立 拒绝向所述源 eNB发送 UE上下文释放命令;
所述源 eNB在获知所述目标 eNB的通知后,释放该 UE的资源的步骤包 括:
所述源 eNB收到所述 UE上下文释放命令后释放该 UE的相关资源。
7、 一种演进基站 (eNB )切换中无线资源连接(RRC ) 重建立拒绝的 系统, 其包括用户设备(UE ) 、 切换的源 eNB和目标 eNB , 其中:
所述 UE设置为: 在切换过程中检测到链路异常时, 向所述目标 eNB的 切换小区发送 RRC连接重建立请求;
所述目标 eNB设置为:在切换资源准备阶段将所述 UE的 RRC连接重建 立请求拒绝后,及时发送消息通知所述源 eNB发生了 UE的 RRC连接重建立 拒绝;
所述源 eNB设置为:在获知所述目标 eNB的通知后,释放该 UE的资源。
8、 按照权利要求 7所述的系统,该系统还包括移动性管理实体(MME ); 若所述切换为 eNB间 X2接口的切换, 则在 X2接口协议的无线网络层 原因中增加失败的原因值: RRC连接重建立拒绝; 若所述切换为 eNB与 MME间 SI接口的切换, 则在 S1接口协议的无线 网络层原因中增加失败的原因值: RRC连接重建立拒绝。
9、 按照权利要求 8所述的系统, 其中, 所述切换为 eNB间 X2接口的 切换;
所述目标 eNB是设置为: 将所述 UE的 RRC连接重建立请求拒绝后, 向 所述源 eNB发送切换准备失败消息, 且失败的原因值设为所述 RRC连接重 建立拒绝;
所述源 eNB是设置为: 根据所述切换准备失败消息中失败的原因值为所 述 RRC连接重建立拒绝 , 向所述 MME发送 UE上下文释放请求消息 , 并在 收到所述 MME返回的 UE上下文释放命令后释放所述 UE相关的资源; 所述 MME设置为: 收到所述 UE上下文释放请求消息后向源 eNB返回 上下文释放命令。
10、 按照权利要求 8所述的系统, 其中, 所述切换为 eNB与 MME间 S1接口的切换;
所述目标 eNB是设置为: 将所述 UE的 RRC连接重建立请求拒绝后, 向 所述 MME发送切换失败消息,且失败的原因值设为所述 RRC连接重建立拒 绝;
所述 MME设置为: 收到该切换失败消息后, 根据原因值为所述 RRC连 接重建立拒绝向所述源 eNB发送 UE上下文释放命令;
所述源 eNB是设置为: 收到所述 UE上下文释放命令后释放该 UE的相 关资源。
11、 一种演进基站(eNB ) , 其包括通知模块和资源释放模块; 所述通知模块设置为: 当所述 eNB在切换中作为目标 eNB, 在切换资源 准备阶段将用户设备(UE ) 的 RRC连接重建立请求拒绝后, 及时发送消息 通知源 eNB发生了 UE的 RRC连接重建立拒绝;
所述资源释放模块设置为: 当所述 eNB在切换中作为源 eNB时,在获知 目标 eNB在切换资源准备阶段将 UE的 RRC连接重建立请求拒绝后,释放该 UE的资源。
12、按照权利要求 11所述的 eNB, 其中, 所述切换为 eNB间 X2接口的 切换;
所述通知模块是设置为: 当所述 eNB在切换中作为目标 eNB, 将 UE的 RRC连接重建立请求拒绝后, 向所述源 eNB发送切换准备失败消息,且失败 的原因值设为所述 RRC连接重建立拒绝;
所述资源释放模块是设置为: 当所述 eNB在切换中作为源 eNB时,接收 到目标 eNB发送的切换准备失败消息后, 根据所述切换准备失败消息中失败 的原因值为所述 RRC连接重建立拒绝, 向移动性管理实体(MME )发送 UE 上下文释放请求消息,并在收到所述 MME返回的 UE上下文释放命令后释放 所述 UE相关的资源。
13、 按照权利要求 11所述的 eNB, 其中, 所述切换为 eNB间 S1接口的 切换;
所述通知模块是设置为: 当所述 eNB在切换中作为目标 eNB, 将 UE的 RRC连接重建立请求拒绝后, 向 MME发送切换失败消息, 且失败的原因值 设为所述 RRC连接重建立拒绝 ,指示所述 MME向源 eNB发送 UE上下文释 放命令;
所述资源释放模块是设置为: 当所述 eNB在切换中作为源 eNB时,接收 到 MME发送的 UE上下文释放命令后释放所述 UE相关的资源。
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CN103108403B (zh) * | 2011-11-10 | 2017-12-22 | 深圳市中洲科技有限公司 | 跨基站rrc连接重建方法及系统 |
CN104853390A (zh) * | 2015-05-28 | 2015-08-19 | 武汉邮电科学研究院 | 一种lte系统的s1切换准备阶段失败处理方法 |
CN109309968B (zh) * | 2017-07-28 | 2022-03-08 | 华硕电脑股份有限公司 | 无线通信系统中恢复无线电资源控制连接的方法和设备 |
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