CN101043720A - User equipment switching method in long-term evolvement network and system thereof - Google Patents

User equipment switching method in long-term evolvement network and system thereof Download PDF

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CN101043720A
CN101043720A CN 200610070917 CN200610070917A CN101043720A CN 101043720 A CN101043720 A CN 101043720A CN 200610070917 CN200610070917 CN 200610070917 CN 200610070917 A CN200610070917 A CN 200610070917A CN 101043720 A CN101043720 A CN 101043720A
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base station
node
user equipment
nodeb
target
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CN 200610070917
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CN100499909C (en )
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于映辉
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华为技术有限公司
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Abstract

The disclosed UE switch method in LTE network comprises: when receiving the context verification message of target NodeB, the access gateway stops transmitting data to the NodeB and buffer data into the gateway; after NodeB completes the wireless link connection with UE, the gateway uses the temporary channel or through source NodeB to send buffer data to the target NodeB, and the latter sends the user data to UE through wireless link; after switch, the access gateway uses the switched new channel to send user data to the target NodeB, and the latter transmits the user data to the UE through the wireless link. This invention reduces request on data buffer for source NodeB.

Description

长期演进网络中用户设备切换方法及其系统 LTE network switching method and system for a user equipment

技术领域 FIELD

本发明涉及长期演进网络,特别涉及长期演进网络中的用户设备切换技术。 The present invention relates to a Long Term Evolution network, and particularly relates to user equipment switches Long Term Evolution network.

背景技术 Background technique

移动通信技术从20世纪末进入第二代移动通信(The Second Generation,简称“2G”)以来,得到了迅速发展。 Since mobile communication technology from the late 20th century into the second generation mobile communication (The Second Generation, referred to as the "2G"), has been developing rapidly. 但是,随着用户数量的增加,以及对业务种类和性能等要求的不断提高,2G逐渐显示出在数据传输能力等方面的限制。 However, as the number of users and the types of business and the continuous improvement of performance requirements, 2G gradually show a limitation in data transmission capacity and the like. 因此,数据传输能力更强的第三代移动通信(The Third Generation,简称“3G”)进入了高速发展阶段,移动通信领域呈现出由2G逐步向3G过渡的态势。 Therefore, enhanced data transmission capabilities of the third generation mobile communication (The Third Generation, referred to as "3G") has entered a stage of rapid development, mobile communications showing a gradual transition from 2G to 3G situation.

在3G系统逐步进入商用的同时,业界已经开始了新技术的研究工作。 While 3G systems gradually into the commercial, the industry has already begun research new technologies. 有的公司将这些新技术称为超3G(Super 3G)技术,也有的公司将其称为3.9G技术。 Some of these companies will be new technology called Super 3G (Super 3G) technology, some companies also referred to as 3.9G technology. 3.9G技术的数据业务传输速率将达到100Mbps左右,其引入大量的先进技术,并对许多现有的技术作了一定的改进。 Business data transfer rate of 3.9G technology will reach 100Mbps, we introduced a lot of advanced technology, and many were taken to improve existing technologies.

为了保证更长一些时间(如10年或更长)的竞争力,第三代合作伙伴项目(3rd Generation Partnership Project,简称“3GPP”)从2004年下半年开始启动了长期演进(Long Term Evolution,简称“LTE”)项目。 In order to ensure longer time (such as 10 years or more) of competitiveness, the Third Generation Partnership Project (3rd Generation Partnership Project, referred to as "3GPP") from the second half of 2004 started a long-term evolution (Long Term Evolution, referred to as "LTE") project. 并在LTE项目中对通用移动通信系统(Universal Mobile Telecommunications System,简称“UMTS”)作了一些改进。 Project of LTE and universal mobile telecommunications system (Universal Mobile Telecommunications System, referred to as "UMTS") made some improvements.

总的来讲,UMTS系统由用户设备(User Equipment,简称“UE”)、通用移动通信系统地面无线接入网(UMTS Terrestrial Radio Access Network,简称“UTRAN”)和核心网(Core Network,简称“CN”)组成。 In general, UMTS system by a user equipment (User Equipment, referred to as "UE"), universal mobile telecommunications system terrestrial radio access network (UMTS Terrestrial Radio Access Network, referred to as "the UTRAN ') and a core network (Core Network, referred to as" CN ") components.

UTRAN中又包括许多连接到CN的无线网络子系统(Radio NetworkSubsystem,简称“RNS”)。 The UTRAN also includes a plurality of connecting to the CN radio network subsystem (Radio NetworkSubsystem, referred to as "RNS"). 一个RNS包括一个无线网络控制器(Radio NetworkController,简称“RNC”)和一个或多个基站(NodeB),每个NodeB覆盖一个或多个小区。 A RNS comprises a radio network controller (Radio NetworkController, referred to as "RNC") and one or more base stations (NodeB), each NodeB cover one or more cells.

当前,在LTE的演进过程中,将NodeB、RNC和CN的三层节点的网络结构简化成两层节点的结构,RNC功能被分割到NodeB,称为演进的NodeB(也即eNodeB),以及诸如接入网关(access Gateway,简称“aGW”)的高层节点中。 Currently, in the LTE evolution process, the NodeB, simplify the network structure of three nodes RNC and CN nodes into two-layer structure, the NodeB to the RNC function is divided, called evolved NodeB (i.e., an eNodeB), as well as the high level node access gateway (access gateway, referred to as "aGW") in. 接入网关具体包含用户面实体(User Plane Entity,简称“UPE”)和控制面的移动管理实体(Mobility Management Entity,简称“MME”)。 Specifically the access gateway comprises a user plane entity (User Plane Entity, referred to as "UPE") and a mobility management entity of the control plane (Mobility Management Entity, referred to as "MME").

随着UMTS系统结构的改变,基于UMTS系统的一些操作也相应地有所变化。 With the system configuration changes UMTS, correspondingly vary based on some operating the UMTS system.

下面以UE在不同NodeB间的切换为例。 Here UE to switch between different NodeB example.

在所有的蜂窝移动通信技术中,切换都是及其重要的组成部分,具体地说,当UE离开一个小区进入另外一个小区时,该UE所接收到的原来小区的信号必然越来越弱,而它所接收到的正在进入小区的信号也就将越来越强。 In all cellular mobile communication technology, the handover is an important part and, in particular, when a UE leaves a cell into another cell, the signal received by the UE to the original cell bound to become weaker, and it receives the signal is entering the cell it will become increasingly strong. 为了保持UE的通信质量,必须将对该UE的接续由原来的NodeB切换到新进入的信号较强的NodeB。 To maintain the communication quality of the UE, the UE must be in connection to the switching signal from the original NodeB strong new incoming NodeB. 在无线通信系统中,例如宽带码分多址(WidebandCode Division Multiple Access,简称“WCDMA”)系统和码分多址2000(CodeDivision Multiple Access 2000,简称“CDMA2000”)系统等,当UE处于越区切换状态时,UE同时和多个参与越区切换的NodeB通信,UE和UTRAN分别把来自多个NodeB的信号进行分级合并,从而改善UE处于越区切换时的信号通信的质量,进而保持越区切换时的数据不丢失。 In a wireless communication system, such as Wideband Code Division Multiple Access (WidebandCode Division Multiple Access, referred to as "WCDMA") system and Code Division Multiple Access 2000 (CodeDivision Multiple Access 2000, referred to as "CDMA2000") system, when the UE is handover state, and a plurality of UE simultaneously participating NodeB communication handoff, the UE and the UTRAN, respectively, signals from a plurality of classifying combined NodeB, the UE is to improve the quality of a communication signal at the time of handover, so as to maintain the handover data is not lost.

然而,在LTE中,由于所有的业务都在分组业务上承载,因此在切换过程中,用户面数据的处理就非常重要。 However, in LTE, because all the operations are carried on packet traffic, so the handover process, the user plane data processing is very important. 且使用不同业务的UE在切换过程中对用户面数据的处理要求不同。 And use different services in the UE handover process different process requirements of the user plane data. 如非实时业务,只要对用户数据进行合理的缓存和转发就可以满足要求。 Such as non-real-time business, as long as the user data cache and a reasonable forward to meet the requirements. 但是对于实时业务来说,对数据是否丢失要求得并不严格,反而更注重数据的实时性和同步传输。 But for real-time business, the loss of data if the requirements are not too strict, but pay more attention to real-time and synchronous data transmission.

在LET中,UE从一个小区转移到另一个小区时,无线网络对其进行的切换需要经过几个阶段:首先在切换准备阶段,源NodeB和目标NodeB建立数据通道。 In the LET, the UE moves from one cell to another cell, the radio network switching them need to go through several stages: first in the handover preparation phase, the source NodeB and the target NodeB establishing a data channel. 之后,在切换过程中,源NodeB对用户数据进行转发,而目标NodeB对用户数据进行缓存。 Thereafter, during handover, the source NodeB forwarding user data, and user data to the target NodeB cache. 切换在无线网络侧完成后,源NodeB和目标NodeB都对用户数据进行转发,即先由源NodeB向目标NodeB转发,再由目标NodeB向UE发送。 After the handover the wireless network side is completed, both the source NodeB and the target NodeB forwards the data to the user, i.e. first by the source NodeB forwards to the target NodeB, then transmitted by the target NodeB to the UE. 在目标NodeB和UPE建立数据通道后,UPE把数据通道从源NodeB转换到目标NodeB。 After establishing a data channel in the target NodeB and the UPE, UPE data path from the source to the target NodeB NodeB.

具体的切换过程如图1所示,在步骤101与步骤102中,UE未进入新的小区,UPE通过其所在的源NodeB向其传输数据。 Specific handover procedure shown in Figure 1, in a step 101 and step 102, UE enters a new cell does not, by the UPE in its source NodeB data transmitted thereto. 在步骤103与104中,UE根据实际情况向源NodeB发送测量报告,NodeB根据该报告决定进行切换,并在步骤105中,向目标NodeB发送上下文信息。 In step 103 and 104, the UE according to the actual transmission measurement report to the source NodeB, NodeB decides a handover according to the report, and in step 105, transmits the context information to the target NodeB. 在步骤106中,目标NodeB保存接收到的上下文信息,并在步骤107中,向源NodeB返回一个上下文证实消息。 In step 106, the target NodeB save context information received, and in step 107, the source NodeB returns a context acknowledgment message. 源NodeB收到上下文证实消息,知道目标NodeB已同意UE进行切换后,在步骤108中,源NodeB向UE下发切换命令。 After receipt of a Context Confirm message source NodeB, NodeB knows that the target have agreed to handover of the UE, in step 108, the source NodeB sends a handover command to the UE. 进而在步骤109与110中,源NodeB缓存来自UPE的数据,同时UE离开原小区,进入新的小区。 Further, in step 109 and 110, the source NodeB UPE data from the cache, while the UE leaves the original cell into a new cell. 在步骤111与112中,源NodeB将缓存的数据发送到目标NodeB,目标NodeB保存该数据。 In step 111 and 112, the source NodeB transmits the buffered data to the target NodeB, NodeB save the target data. 接着在步骤113中,UE向目标NodeB发送切换确认信息。 Next, in step 113, UE transmits a handover confirm message to the target NodeB. 继而在步骤114中,目标NodeB建立与该UE之间的物理链路,返回建立无线链路的消息,并在步骤115中,向UPE发送地址变更消息。 Then in step 114, the target NodeB establishment message and the physical link between the UE, returns radio link establishment, and in step 115, transmits the address change message to the UPE. 在步骤116中,UPE根据该消息更改用户面的路由。 In step 116, UPE change the routing of the user plane according to the message. 在步骤117与118中,源NodeB继续缓存数据,目标NodeB向MME发送地址变更重定位指示。 In step 117 and 118, continues the cached data source NodeB, NodeB transmits to the target MME relocation address change indication. 在步骤119与120中,源NodeB将其缓存的数据发送给目标NodeB进行缓存。 In step 119 and 120, the source NodeB transmits its buffered data to the target NodeB cache. 之后在步骤121至126中,无线网络侧完成路由上的切换,切换彻底完成,目标NodeB将缓存的数据发送给UE。 After the step 121 to 126, the wireless network handover is completed, switching the route fully completed, the target NodeB transmits the buffered data to the UE. 最后,在步骤127中,源NodeB超时,释放UE的资源。 Finally, in step 127, the source NodeB expires, the UE releases the resources.

在实际应用中,上述方案存在以下问题:现有切换过程占用较多的无线资源,对NodeB缓存的要求极高,且不便于数据流的同步。 In practical applications, the presence of the above-described embodiment the following problems: the conventional handover process consumes more radio resources of the NodeB high demands cache, data synchronization and inconvenient stream.

造成这种情况的主要原因在于,由于在现有的切换过程中,需要通过源NodeB对数据进行缓存,当用户数据比较大,或发生切换的用户很多时,对于NodeB的缓存有着极高的要求。 Main reason for this is that, since the conventional handover process, the need for data cache via the source NodeB, many large when the user data, the user or handover occurs, the cache for the NodeB has a high requirement . 并且在切换完成后,源NodeB必须在转发完全部的用户数据,定时器超时后,才能释放其无线资源,占用了较多的无线资源。 And after completion of the handover, the source NodeB forwards the user data must be fully part of the timer expires, to release its wireless resources, taking up more radio resources. 另外,在切换完成后,需要通过目标NodeB传输数据时,需要源NodeB的指示,才能重新同步用户的数据流。 Further, after the handover is completed, the target NodeB used to transfer data, indicating the source NodeB is required to re-synchronize the user data stream.

发明内容 SUMMARY

有鉴于此,本发明的主要目的在于提供一种长期演进网络中用户设备切换方法,使得UE切换时可以降低源NodeB对数据缓存能力的要求,并且易于用户数据流的同步。 In view of this, the main object of the present invention is to provide a handover method in a user equipment in the LTE network, making it possible to reduce the requirements for data cache source NodeB the UE handover capability, and easy to synchronize user data stream.

为实现上述目的,本发明提供了一种长期演进网络中用户设备切换方法,包含以下步骤:A用户设备开始切换时,接入网关停止向源基站节点发送用户数据,并将需要发送的用户数据缓存在该接入网关中;B目标基站节点建立与所述用户设备的无线链路后,所述接入网关将所缓存的用户数据通过该目标基站节点发送给所述用户设备。 To achieve the above object, the present invention provides a handover method in a user equipment in the LTE network, comprising the steps of: when starting handover A user equipment, the access gateway stops transmitting user data from the source base station node, and the user data needs to be sent cached in the access gateway; the target base station node B to establish a radio link with the user equipment, the access gateway transmits the buffered user data to the user equipment via the target base station node.

其中,还包含以下步骤:当所述切换完成时,所述接入网关通过新建立的通道向所述目标基站节点发送用户数据。 Wherein, further comprising the step of: when the handover is completed, the access gateway sends the user data to the target base station through a channel newly established node.

此外在所述方法中,在所述步骤B中,还包含以下步骤:所述目标基站节点通过所述无线链路的连接,向所述用户设备发送用户数据。 Further, in the method, in the step B, further comprising the step of: the target base station through the connection node of the wireless link, to transmit user data to the user equipment.

此外在所述方法中,当所述接入网关接收到所述目标基站节点的上下文证实消息时,执行所述步骤A。 Further in the method, when the access gateway to the target base station receiving node Context Confirm message, performing the step A.

此外在所述方法中,还包含以下步骤:所述接入网关建立与所述目标基站节点的临时通道;目标基站节点建立与所述用户设备的无线链路后,所述接入网关通过所述临时通道将所缓存的所述用户数据发送给该目标基站节点,由该目标基站节点将该用户数据通过所建的无线链路发送给所述用户设备;当所述切换完成时,所述接入网关拆除所述临时通道。 Further in the method, further comprising the step of: establishing a temporary channel to the access gateway and the target base station node; After establishing a wireless link with the target base node of the user equipment, said access gateway being the temporary user data channel of said transmit the buffered base station to the target node, the target base station from the user data of the node to the user equipment via a radio link built; when the handover is completed, the removal of the temporary access gateway channel.

此外在所述方法中,在所述步骤B中,所述接入网关将所缓存的所述用户数据发送给所述源基站节点,通过该源基站节点的转发,将所缓存的所述用户数据发送给该目标基站节点,由该目标基站节点将该用户数据发送给所述用户设备。 Further the user in the method, in the step B, the access gateway sends the buffered data to the user node to the source base station, the source base station by forwarding node, the buffered the target base station transmits data to a node, base station by the target node transmits the user data to the user equipment.

此外在所述方法中,还包含以下步骤:当所述源基站节点获知所述目标基站节点已建立所述无线链路的连接时,立即释放该源基站节点的无线资源。 Further in the method, further comprising the step of: when said source base station node acquires the target base station connection node of a wireless resource, the immediate release of the source base station node of the wireless link has been established.

此外在所述方法中,所述目标基站节点通过向所述源基站节点发送所述无线链路的连接完成消息,通知该源基站节点所述目标基站节点已建立所述无线链路。 Further, in the method, the target base station transmits a connection node via the radio link to the source base station node complete message, the source base station notifies the target base station node node has established the wireless link.

此外在所述方法中,所述目标基站节点通过向所述接入网关发送所述无线链路的连接完成消息,并由该接入网关向所述源基站节点转发该消息,通知该源基站节点所述目标基站节点已建立所述无线链路。 Further, in the method, the target base station to the access gateway node by sending the radio link connection complete message by the access gateway forwards the message to the source base station node to notify the source base station node of the target base station node has established the wireless link.

本发明还提供了一种长期演进网络中用户设备切换系统,包含用户设备、接入网关、源基站节点、以及目标基站节点,所述接入网关中还包含缓存模块,用于缓存所述用户设备切换时的用户数据;所述接入网关还用于在所述用户设备开始切换时,停止向所述源基站节点发送用户数据,并将需要发送的用户数据缓存在所述缓存模块中,当所述目标基站节点建立与所述用户设备的无线链路后,将所缓存的用户数据通过该目标基站节点发送给所述用户设备。 The present invention further provides a user equipment in the LTE network switching system, comprising a user equipment, an access gateway, the source base station node, and the target base station node, the access gateway further comprises a buffer module, configured to buffer the user data switching apparatus of the user; the access gateway is further configured to start when the user equipment is switched, the user stops sending data to the source base station node, and the user data to be transmitted is cached in the cache module, after establishing a wireless link with the user equipment to the target base station node, the buffered user data sent to the user device via the target base station node.

通过比较可以发现,本发明的技术方案与现有技术的主要区别在于,当接入网关接收到目标NodeB的上下文证实消息时,停止向源NodeB发送用户数据,将需要发送给UE的数据缓存在该接入网关中。 By comparison found that the main difference between the aspect of the present invention and the prior art is that, when the access gateway receives a target NodeB context acknowledgment message, stops transmitting user data from the source NodeB, a UE needs to be sent to the data cache the access gateway. 当目标NodeB完成与该UE的无线链路连接时,接入网关通过与目标NodeB建立的临时通道或通过源NodeB的转发,将所缓存的用户数据发送给目标NodeB,由该目标NodeB将该用户数据通过无线链路发送给该UE。 When the target NodeB complete wireless link connection with the UE, the access gateway, the buffered user data sent via the temporary channel established with the target NodeB or forwarded by the source to the target NodeB, NodeB, the NodeB by the target user data sent to the UE through the radio link. 当切换完成时,接入网关通过切换后的新建通道向目标NodeB发送用户数据,由该目标NodeB将该用户数据通过无线链路发送给该UE。 When the handover is completed, the access gateway sends the user data to the target NodeB through the new channel after handover by the target NodeB transmits the user data via the radio link to the UE.

当源NodeB获知目标NodeB已建立与UE的无线链路连接时,立即释放该源NodeB的无线资源。 When informed source NodeB NodeB target established wireless link connection with the UE, the immediate release of radio resources of the NodeB source.

这种技术方案上的区别,带来了较为明显的有益效果,即通过在接入网关处缓存切换过程中的用户数据,降低了源NodeB对数据缓存能力的要求,而且由于在接入网关处所缓存的用户数据即未发送给源NodeB的用户数据,因此源NodeB无需向目标NodeB指示最后发送的用户数据,简化了对用户数据的同步处理。 Difference in this solution brings obvious advantageous effect, i.e., the user data buffer in the access gateway in the handover process by reduced requirement for data source NodeB buffer capacity, and because the access gateway in premises buffered user data sent to the user data that is not the source NodeB, the source NodeB without indicating the last transmission of user data to the target NodeB, simplifies the synchronization processing for the user data.

另外,由于源NodeB并没有缓存在切换过程中的用户数据,因此当目标NodeB完成与进行切换的UE的无线链路连接时,该源NodeB可以立即释放无线资源,而无需等到该源NodeB的定时器超时,节约了空口资源。 Further, since the source NodeB user data during the handover process and is not cached, so when the target NodeB complete radio link handover of the UE connection to the source NodeB can release radio resources immediately, without waiting for the timing of the source NodeB timeout, saving air interface resources.

附图说明 BRIEF DESCRIPTION

图1是现有技术中UE切换的方法流程图;图2是根据本发明第一实施方式的LTE网络中UE切换方法流程图;图3是根据本发明第二实施方式的LTE网络中UE切换方法流程图;图4是根据本发明第三实施方式的LTE网络中UE切换方法流程图;图5是根据本发明第四实施方式的LTE网络中UE切换方法流程图。 FIG 1 is a flowchart of a method of the prior art handover UE; FIG. 2 is a flowchart of a first embodiment according to the LTE network embodiment of the present invention, a UE handover method; FIG. 3 is a handover UE according to the LTE network to the second embodiment of the present invention the method of flowchart; FIG. 4 is a flowchart of a third embodiment of the LTE network, a UE handover method of the present invention; FIG. 5 is a flowchart of a fourth embodiment of the LTE network, a UE handover method of the present invention.

具体实施方式 Detailed ways

为使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明作进一步地详细描述。 To make the objectives, technical solutions, and advantages of the present invention will become apparent in conjunction with the accompanying drawings below of the present invention will be described in further detail.

本发明的核心在于,当UE从一个小区移动到另一个小区,需要进行切换时,向其目标NodeB发送上下文信息,目标NodeB收到上下文信息后向接入网关发送上下文证实消息,接入网关收到该上下文证实消息后,停止向源NodeB发送用户数据,转而将需要发送的用户数据缓存在该接入网关中,并在UE与目标NodeB建立无线链路后,将所缓存的用户数据发送给目标NodeB,由目标NodeB通过连接完成的无线链路,向UE转发缓存的用户数据,之后,在切换完成时,接入网关通过新建立的新建通道向目标NodeB发送用户数据。 The core of the present invention is that, when the UE moves from one cell to another cell, handover is required, sending context information to its target NodeB sends a Context Confirm message to the target access gateway NodeB receives the context information, the access gateway yield after confirmation message to the context, to stop transmitting user data to the NodeB source, instead of the user data to be transmitted is cached in the access gateway, and establishing a radio link in the NodeB and the target UE, the buffered user data transmission to the target NodeB, NodeB via a radio link by the target connection is completed, forwarding the buffered user data to the UE, after the handover is completed, the access gateway sends the user data to the target NodeB newly established through the new channel.

下面根据发明原理对本发明第一实施方式LTE网络中UE切换方法进行说明。 The following will be described a first embodiment of the present invention, a UE LTE network handover method according to the principles of the invention.

如图2所示,在步骤201中,UE从一个小区向另一个小区移动,无线网络产生相应的测量报告并决定对其进行切换。 As shown, in step 201, UE moves from one cell to another cell 2, the wireless network and generating a corresponding measurement report its handover decision.

接着进入步骤202,接入网关的MME部分向目标NodeB发送上下文信息,要求切换。 Proceeds to step 202, MME part of the access gateway transmits the context information to the target NodeB, handover is required.

接着进入步骤203,目标NodeB同意切换,返回上下文证实消息,开始本次切换。 Proceeds to step 203, the target NodeB agrees handover confirmation message returns the context, this handover start.

接着进入步骤204,MME收到上下文证实消息后,向接入网关的UPE部分发送新增临时缓存的命令,要求其建立临时缓存。 Proceeds to step 204, MME context after receiving the confirmation message, sending a new temporary buffer to the UPE portion of the access gateway command, which requires the establishment of a temporary buffer.

接着进入步骤205,UPE接收到该命令后,停止向源NodeB发送用户数据,并建立相应的临时缓存,缓存需要发送的用户数据。 Subsequently proceeds to step 205, UPE receiving the command to stop transmitting user data to the NodeB source, and to establish the corresponding temporary buffer, the user data buffer to send. 由于用户数据不再缓存在源NodeB中,大大降低了源NodeB对缓存的要求,使其易于实现。 Since the user data is not cached in the source NodeB, NodeB requirements greatly reduce the source to the cache, it is easy to implement.

接着进入步骤206,UPE向MME返回缓存已建立的确认信息。 Proceeds to step 206, UPE cache returns an acknowledgment message to the established MME.

接着进入步骤207,进行切换,UE与目标NodeB建立无线链路。 Then proceeds to step 207, handover, the UE and the target NodeB establishing a radio link.

接着进入步骤208,目标NodeB向MME发送无线链路连接完成的消息,并由MME向源NodeB转发该消息,通知源NodeB该UE已经与目标NodeB建立无线链路。 Proceeds to step 208, the target NodeB transmits radio link connection complete message to the MME, by the MME forwards the message to the source NodeB, NodeB notifies the source that the UE has established a radio link with a target NodeB.

之后,在步骤209中,源NodeB收到无线链路连接完成消息后,立即释放与该UE相关的无线资源。 Thereafter, in step 209, the source NodeB receives the radio link connection complete message, the immediate release of radio resources associated with the UE.

同时,在步骤210中,MME收到无线链路连接完成消息后,向UPE发送命令,要求UPE向目标NodeB发送缓存的用户数据。 Meanwhile, in step 210, MME after receiving the radio link connection complete message, sends a command to the UPE, UPE requires user data to the transmission buffer of the target NodeB.

接着进入步骤211,UPE收到该命令后,建立与目标NodeB的临时通道,通过该临时通道将之前缓存的用户数据发送给目标NodeB。 Subsequently proceeds to step 211, UPE receiving the command, establishing a temporary channel with the target NodeB, the NodeB transmits to the target before the passage through the temporary buffered user data. 并在步骤212中,由目标NodeB将这些用户数据通过已建立的无线链路发送给UE。 And at step 212, the target NodeB these user data to the UE through the established radio link.

接着进入步骤213,目标NodeB向UPE发送地址变更信息。 Proceeds to step 213, a target NodeB change information to send UPE address.

在步骤214中,UPE根据该信息更改用户面的路由,并在步骤215中,返回更改完成的确认消息。 In step 214, UPE change the routing information based on the user plane, and at step 215, returns an acknowledgment message to complete the change. 切换完成,UPE拆除之前建立的临时通道。 The handover is completed, the temporary channel established before UPE removed.

接着在步骤216与217中,UPE通过新建立的新建通道向目标NodeB发送用户数据。 Then 216 as in 217, UPE transmits the user data to the target NodeB in step newly established through the new channel.

不难看出,从切换开始时,UPE不再向源NodeB发送用户数据,将数据缓存起来,当UE与目标NodeB建立无线链路后,UPE将缓存的用户数据通过目标NodeB间接地发送给UE,当切换完成后,UPE通过切换后的新建通道向目标NodeB发送用户数据,由该目标NodeB将该用户数据通过无线链路发送给该UE。 Easy to see, from the start of switching, the UPE will not send user data from the source NodeB, the cached data, after the UE and the target NodeB establishing a radio link, the UPE buffers the user data indirectly through the target NodeB to the UE, when the handover is completed, the UPE transmits the user data to the target NodeB through the new path after the handover by the target NodeB transmits the user data via the radio link to the UE. 整个数据发送过程都是在UPE的控制下,因而不需要源NodeB向目标NodeB指示最后发送的用户数据以进行数据同步,从而在减少NodeB缓存压力的同时,简化了对用户数据的同步处理。 The entire data transmission process is under the control of UPE therefore does not require the user indicating the source NodeB transmits data to the last data synchronization to the target NodeB, NodeB cache thereby simultaneously reducing the pressure, simplifies the synchronization processing for the user data.

值得一提的是,本实施方式主要是作为非实时业务的一种切换方法,具体使用时,在需要进行切换时,可在接入网关处对业务进行判断,如判断出是非实时业务,则采用本实施方式,在接入网关的UPE部分缓存其用户数据,如果判断出是实时业务,则可以使用双播(Bi-casting)方法对其进行切换,不再在UPE处缓存其用户数据。 It is worth mentioning that the present embodiment is mainly used as a method for non-real time traffic switching, the specific use, when required to be switched, the business may be determined at the access gateway, such as the non-real-time service is determined, the according to the present embodiment, in which the user data portion of the cache access gateway UPE, if it is determined that a real-time service multicast may be used bis (Bi-casting) method of switching them, that is no longer cached in the user data at the UPE.

本发明第二实施方式LTE网络中UE切换方法如图3所示,在步骤301中,UE从一个小区向另一个小区移动,无线网络产生相应的测量报告并决定对其进行切换。 The second embodiment of the present invention, UE handover method in an LTE network shown in Figure 3, in step 301, UE moves from one cell to another cell, the wireless network and generating a corresponding measurement report its handover decision.

接着进入步骤302,源NodeB通过信令通道直接向目标NodeB发送上下文信息,要求切换。 Proceeds to step 302, the source NodeB via the signaling channel transmits directly to the target NodeB context information, handover is required.

接着进入步骤303与304,目标NodeB同意切换,分别向源NodeB与接入网关的MME部分返回上下文证实消息,开始本次切换。 303 and proceeds to step 304, the target NodeB agrees handover, the MME return the portion of the source NodeB and the access gateway context confirm message, the beginning of this switch.

步骤305-307对应于步骤204-206,在此不再赘述。 Steps 305-307 correspond to steps 204-206, which are not repeated herein.

接着进入步骤308,MME向源NodeB发送切换准备完成消息。 Proceeds to step 308, MME to the source NodeB sends a handover prepare complete message.

接着进入步骤309,进行切换,UE与目标NodeB建立无线链路。 Then proceeds to step 309, handover, the UE and the target NodeB establishing a radio link.

接着进入步骤310,目标NodeB向MME发送无线链路连接完成的消息,并在步骤311中,目标NodeB同时通过信令通道直接向源NodeB发送无线链路连接完成消息,通知源NodeB该UE已经与目标NodeB建立无线链路。 Proceeds to step 310, the target NodeB transmits a radio link connection complete message to the MME, in step 311, the target NodeB transmitted simultaneously via the signaling channel to the source NodeB a direct radio link connection complete message, the UE notifies the source NodeB has to target NodeB to establish a wireless link.

之后的步骤312-320对应于步骤209-217,在此不再赘述。 After steps 312-320 correspond to steps 209-217, which are not repeated herein.

本实施方式与第一实施方式大致相同,其区别仅在于第一实施方式中源NodeB与目标NodeB之间不存在信令通道,UE的上下文信息以及无线链路连接完成消息都需要通过MME转发,而本实施方式中,源NodeB与目标NodeB之间存在信令通道,源NodeB可以直接向目标NodeB发送上下文信息,并在无线链路建立后,目标NodeB可以直接向源NodeB发送消息,通知无线链路连接的完成。 The present embodiment is substantially the same manner as in the first embodiment, except that only the signaling channel exists between the first embodiment the source NodeB and the target NodeB, UE context information and radio link connection must go through the complete message forwarded by the MME, while the present embodiment, the signaling path exists between the source and the target NodeB NodeB, NodeB source NodeB may send the context information directly to the target, and the radio link setup, the target NodeB may send a message directly to the source NodeB, notifies the wireless link Road connection is completed.

本发明第三实施方式LTE网络中UE切换方法如图4所示,步骤401-408对应于步骤201-208,在此不再赘述。 The third embodiment of the present invention, UE handover method in an LTE network shown in Figure 4, steps 201-208 correspond to steps 401-408, which are not repeated herein.

在步骤409中,MME收到无线链路连接完成消息后,向UPE发送命令,要求UPE发送缓存的用户数据。 After step 409, MME received radio link connection complete message, sends a command to the UPE, UPE required user data transmission buffer.

接着进入步骤410,UPE将之前缓存的用户数据发送给源NodeB,通过在步骤411中,源NodeB的转发,将缓存的用户数据发送给目标NodeB。 Proceeds to step 410, UPE previously buffered user data sent to the source NodeB,, the buffered user data sent by the NodeB to the target in step 411, the source NodeB forwarding.

之后在步骤412中,由目标NodeB将这些用户数据最终发送给UE。 In Step 412, the final target NodeB transmits the user data to the UE.

接着进入步骤413,源NodeB在转发完来自UPE的缓存用户数据后,释放其与目标NodeB的无线资源。 Then proceeds to step 413, the source NodeB After forwarding the user data from the UPE cache, with the target to release the radio resources of the NodeB.

其后的步骤414-418对应于步骤213-217,在此不再赘述。 Subsequent steps 414-418 correspond to steps 213-217, which are not repeated herein.

本实施方式与第一实施方式大致相同,其区别仅在于,在第一实施方式中UPE通过建立与目标NodeB的临时通道,将缓存的用户数据发送给目标NodeB,而在本实施方式中,UPE将缓存的用户数据发送给源NodeB,由源NodeB通过其数据通道向目标NodeB转发缓存的用户数据,源NodeB在转发结束之后,立即释放与目标NodeB相关的无线资源。 The present embodiment is substantially the same manner as in the first embodiment, the only difference being that, in the first embodiment described UPE by the target NodeB establishing a temporary passage of the buffered user data sent to the target NodeB, in the present embodiment, UPE the buffered user data sent to the source NodeB, NodeB user data from the source data channel which is forwarded to the target NodeB through cache, after the forwarding source NodeB, radio resources associated with the immediate release of the target NodeB.

本发明第四实施方式LTE网络中UE切换方法如图5所示,步骤501-511对应于步骤301-311,在此不再赘述。 UE handover method in an LTE network shown in FIG. 5 a fourth embodiment of the present invention, the steps 501-511 correspond to steps 301-311, which are not repeated herein.

在步骤512中,MME收到无线链路连接完成消息后,向UPE发送命令,要求UPE发送缓存的用户数据。 After step 512, MME received radio link connection complete message, sends a command to the UPE, UPE required user data transmission buffer.

接着进入步骤513,UPE将之前缓存的用户数据发送给源NodeB,通过在步骤514中,源NodeB的转发,将缓存的用户数据发送给目标NodeB。 Proceeds to step 513, UPE previously buffered user data sent to the source NodeB,, the buffered user data sent to the target NodeB by step 514, the source NodeB forwarding.

之后在步骤515中,由目标NodeB将这些用户数据最终发送给UE。 After step 515, the final target NodeB transmits the user data to the UE.

接着进入步骤516,源NodeB在转发完来自UPE的缓存用户数据后,释放与目标NodeB的无线资源。 Proceeds to step 516, the source NodeB After forwarding the user data from the cache of the UPE, and release of radio resources of the target NodeB.

其后的步骤517-521对应于步骤316-320,在此不再赘述。 Subsequent steps 517-521 correspond to steps 316-320, which are not repeated herein.

本发明还涉及到了一种系统,包含UE、接入网关、源NodeB、以及目标NodeB。 The present invention also relates to a system comprising the UE, an access gateway, the NodeB source, and a target NodeB. 在接入网关中还包含缓存模块,用于缓存UE切换时的用户数据。 In the access gateway further comprises a buffer module, the user data buffer for the UE switches.

该接入网关还用于在UE开始切换时,停止向源NodeB发送用户数据,并将需要发送的用户数据缓存在缓存模块中,当目标NodeB建立与该UE的无线链路后,将所缓存的用户数据通过该目标NodeB发送给该UE。 The access gateway is further configured to start a handover when the UE stops transmitting user data from the source NodeB, and user data to be transmitted is cached in the cache module, when the target NodeB establishing the radio link with the UE, the buffered the user data is transmitted to the UE by the target NodeB.

虽然通过参照本发明的某些优选实施方式,已经对本发明进行了图示和描述,但本领域的普通技术人员应该明白,可以在形式上和细节上对其作各种改变,而不偏离本发明的精神和范围。 While the invention has been shown and described with reference to certain preferred embodiments of the present invention, but those of ordinary skill in the art should be understood that various changes may be made thereto in form and detail without departing from the present the spirit and scope of the invention.

Claims (10)

  1. 1.一种长期演进网络中用户设备切换方法,其特征在于,包含以下步骤:A用户设备开始切换时,接入网关停止向源基站节点发送用户数据,并将需要发送的用户数据缓存在该接入网关中;B目标基站节点建立与所述用户设备的无线链路后,所述接入网关将所缓存的用户数据通过该目标基站节点发送给所述用户设备。 A user equipment in the LTE network handover method, comprising the steps of: when starting handover A user equipment, the access gateway stops transmitting user data from the source base station node, and the user data to be transmitted in the buffer an access gateway; the target base station node B to establish a radio link with the user equipment, the access gateway transmits the buffered user data to the user equipment via the target base station node.
  2. 2.根据权利要求1所述的长期演进网络中用户设备切换方法,其特征在于,还包含以下步骤:当所述切换完成时,所述接入网关通过新建立的通道向所述目标基站节点发送用户数据。 The long term evolution network of claim 1 in a user equipment switching method as claimed in claim, characterized in that, further comprising the step of: when the handover is completed, the Access Gateway Node to the target base station through a channel newly established send user data.
  3. 3.根据权利要求2所述的长期演进网络中用户设备切换方法,其特征在于,在所述步骤B中,还包含以下步骤:所述目标基站节点通过所述无线链路的连接,向所述用户设备发送用户数据。 3. The network of claim 2 LTE user equipment handover method according to claim, wherein, in the step B, further comprising the step of: the target base station through the connection node of the wireless link, to the said user equipment to transmit user data.
  4. 4.根据权利要求1至3中任一项所述的长期演进网络中用户设备切换方法,其特征在于,当所述接入网关接收到所述目标基站节点的上下文证实消息时,执行所述步骤A。 1 according to the LTE network as claimed in any of the user equipment handover method as claimed in claim 3, wherein, when the access gateway to the target base station receiving node Context Confirm message, the execution step A.
  5. 5.根据权利要求4所述的长期演进网络中用户设备切换方法,其特征在于,还包含以下步骤:所述接入网关建立与所述目标基站节点的临时通道;目标基站节点建立与所述用户设备的无线链路后,所述接入网关通过所述临时通道将所缓存的所述用户数据发送给该目标基站节点,由该目标基站节点将该用户数据通过所建的无线链路发送给所述用户设备;当所述切换完成时,所述接入网关拆除所述临时通道。 The long term evolution network 4 of the handover method in a user equipment according to claim, wherein, further comprising the step of: establishing a temporary channel to the access gateway and the target base station node; establishing the target base station node after the radio link of the user equipment, the access gateway to the target base station transmits the temporary channel node the buffered data to the user, by the target node the user data base built by the radio link transmission to the user equipment; when the handover is completed, the temporary removal of the access gateway channel.
  6. 6.根据权利要求4所述的长期演进网络中用户设备切换方法,其特征在于,在所述步骤B中,所述接入网关将所缓存的所述用户数据发送给所述源基站节点,通过该源基站节点的转发,将所缓存的所述用户数据发送给该目标基站节点,由该目标基站节点将该用户数据发送给所述用户设备。 6. Long Term Evolution network 4 of the handover method in a user equipment according to claim, wherein, in the step B, the access gateway sends the buffered data to the user node to the source base station, the forwarding node by the source base station, and transmits the buffered user data to the target base station node, the target base station transmits the user data of the node to the user equipment.
  7. 7.根据权利要求4所述的长期演进网络中用户设备切换方法,其特征在于,还包含以下步骤:当所述源基站节点获知所述目标基站节点已建立所述无线链路的连接时,立即释放该源基站节点的无线资源。 The long term evolution network apparatus 4 according to the user switching method as claimed in claim, characterized in that, further comprising the step of: when said source base station, the target base station node acquires the node connecting a radio link has been established, the source base station releases the radio resources of the node immediately.
  8. 8.根据权利要求7所述的长期演进网络中用户设备切换方法,其特征在于,所述目标基站节点通过向所述源基站节点发送所述无线链路的连接完成消息,通知该源基站节点所述目标基站节点已建立所述无线链路。 8. The network of claim 7 LTE user equipment handover method according to claim, wherein the target base station node completes transmitting the message via a radio link connected to the node of the source base station, the base station informs the source node the target base station node of the wireless link has been established.
  9. 9.根据权利要求7所述的长期演进网络中用户设备切换方法,其特征在于,所述目标基站节点通过向所述接入网关发送所述无线链路的连接完成消息,并由该接入网关向所述源基站节点转发该消息,通知该源基站节点所述目标基站节点已建立所述无线链路。 9. The network of claim 7 LTE user equipment in handover method according to claim, wherein the target base station connection node sends a complete message via the wireless link to the access gateway, the access by gateway forwards the message to the source base station node, the source base station notifies the target node of the base station node has established the wireless link.
  10. 10.一种长期演进网络中用户设备切换系统,包含用户设备、接入网关、源基站节点、以及目标基站节点,其特征在于,所述接入网关中还包含缓存模块,用于缓存所述用户设备切换时的用户数据;所述接入网关还用于在所述用户设备开始切换时,停止向所述源基站节点发送用户数据,并将需要发送的用户数据缓存在所述缓存模块中,当所述目标基站节点建立与所述用户设备的无线链路后,将所缓存的用户数据通过该目标基站节点发送给所述用户设备。 10. A user equipment in the LTE network switching system, comprising a user equipment, an access gateway, the source base station node, and the target base station node, wherein the access gateway further comprises a buffer module, configured to buffer the user data when the user equipment switches; the access gateway is further configured to start when the user equipment is switched, the user stops sending data to the source base station node and cached in the user data to be transmitted to the cache module , after establishing a wireless link with the user equipment of the target base station node, the buffered user data sent to the user device via the target base station node.
CN 200610070917 2006-03-22 2006-03-22 User equipment switching method in long-term evolvement network and system thereof CN100499909C (en)

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WO2009052731A1 (en) * 2007-10-15 2009-04-30 Zte Corporation A switching validate message processing method
WO2010105411A1 (en) * 2009-03-17 2010-09-23 华为技术有限公司 Method, device and system for sending data packet
WO2010142082A1 (en) * 2009-06-12 2010-12-16 华为技术有限公司 Switching process method, relay node and target node
WO2011020229A1 (en) * 2009-08-17 2011-02-24 上海贝尔股份有限公司 Method for processing data on relay link and related device
CN101472256B (en) 2008-04-03 2011-04-20 华为技术有限公司 Method for hanging up and recovering bearing as well as gateway proxy and communication system
CN101651971B (en) 2009-09-15 2012-05-09 新邮通信设备有限公司 Downlink switching method and system
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US9338698B2 (en) 2007-09-29 2016-05-10 Huawei Technologies Co., Ltd. Method and eNodeB for forwarding downlink and uplink packets based on S1 handover
US9014139B2 (en) 2007-09-29 2015-04-21 Huawei Technologies Co., Ltd. Method and eNodeB for forwarding downlink and uplink packets based on S1 handover
CN101400156B (en) 2007-09-29 2012-06-06 华为技术有限公司 Downlink and uplink data packet forwarding method based on S1 switching
CN101136835B (en) 2007-09-30 2011-09-21 中兴通讯股份有限公司 Bearing establishment method under idle mode
WO2009043209A1 (en) * 2007-09-30 2009-04-09 Zte Corporation A method for establishing a bearer to an user terminal in an idle mode
WO2009052731A1 (en) * 2007-10-15 2009-04-30 Zte Corporation A switching validate message processing method
CN101472256B (en) 2008-04-03 2011-04-20 华为技术有限公司 Method for hanging up and recovering bearing as well as gateway proxy and communication system
US8724587B2 (en) 2009-03-17 2014-05-13 Huawei Technologies Co., Ltd. Method, apparatus, and system for sending a data packet
WO2010105411A1 (en) * 2009-03-17 2010-09-23 华为技术有限公司 Method, device and system for sending data packet
WO2010142082A1 (en) * 2009-06-12 2010-12-16 华为技术有限公司 Switching process method, relay node and target node
CN102474337B (en) 2009-08-17 2014-02-26 上海贝尔股份有限公司 Method for processing data on relay link and related device
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CN101651971B (en) 2009-09-15 2012-05-09 新邮通信设备有限公司 Downlink switching method and system

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