CN100525497C - Quick calling establishment method for mobile communication system - Google Patents

Quick calling establishment method for mobile communication system Download PDF

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CN100525497C
CN100525497C CN 200510029814 CN200510029814A CN100525497C CN 100525497 C CN100525497 C CN 100525497C CN 200510029814 CN200510029814 CN 200510029814 CN 200510029814 A CN200510029814 A CN 200510029814A CN 100525497 C CN100525497 C CN 100525497C
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message
rnc
nas
cn
step
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CN 200510029814
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CN1937827A (en
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玲 吕
田兴银
许佰魁
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展讯通信(上海)有限公司
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Abstract

本发明提供一种移动通信系统中快速呼叫建立的方法,包括:RRC连接建立:NAS信令连接建立和NAS信令交互;RAB无线接入承载,其特点是,UE向RNC发送RRC连接请求消息,该连接请求消息中封装有NAS消息;RNC在收到RRC请求消息并解析后,就可以将NAS消息转发给CN,CN根据NAS消息就可以发送无线接入承载分配请求消息给RNC并且开始对被叫进行寻呼。 The present invention provides a method for a mobile communication system fast call setup, comprising: an RRC connection establishment: NAS and NAS signaling connection establishment signaling interaction; an RAB radio access bearer, which is characterized, the UE sends an RRC connection request message to the RNC the connection request message encapsulated in the NAS message; RNC after receiving the RRC request message and parsing may forward the NAS message to the CN, CN may send a radio access bearer assignment request message to the RNC according to the NAS message and starts called paging. 这样处理的优势可以减少信令的交互,同时CN提早下发RAB分配请求消息给RNC,RNC收到CN分配请求消息后,可以完成消息的解析和配置的转换。 Such treatment may reduce the advantage of signaling interaction, while earlier issued CN RAB Assignment Request message to the RNC, the RNC receives CN assignment request message, and the configuration can be resolved to complete the conversion of the message. 并且可以提早发送寻呼,缩短接续时延,从而提高终端用户的满意度。 And may transmit the paging early, shortening the connection delay, thereby improving end-user satisfaction.

Description

移动通信系统中快速呼叫建立的方法技术领域本发明涉及移动通信系统中的呼叫建立方法,尤其涉及第三代移动通信系统(UMTS)的呼叫/会话建立方法。 TECHNICAL FIELD The mobile communication system fast call setup of the present invention relates to a method for establishing a call in a mobile communication system, and particularly to the third generation mobile communication system (UMTS) is a call / session establishment method. 背景技术在通信系统中,呼叫建立的持续时间(我们也称为呼叫建立时延或接续时延)是影响用户服务质量的一个重要因素,对于接续时延敏感的业务如交互式游戏、紧急语音呼叫、PoC (Push to talk Over Cellular)等来说,目前UMTS系统中的呼叫建立时延显得较长(一般6〜10秒),本发明的目的就是降低呼叫建立时延,提高用户满意度。 BACKGROUND In a communication system, the duration of the call setup (we also called call setup latency or connection delay) is an important factor affecting user quality of service for delay-sensitive services such as connecting interactive games, urgent voice calls, PoC (Push to talk Over Cellular) and the like, the current UMTS system appear longer call setup delay (typically 6~10 seconds), object of the present invention is to reduce call setup delay and improving the user satisfaction. 下面简单介绍UMTS系统中的呼叫建立过程,以移动台(UE)呼叫为例,呼叫建立过程示意图如图1所示,图中包括了UMTS系统中几个主要的功能实体:用户端(UE)、基站(NodeB)、 无线网络控制器(RNC)和核心网(CN),另外,该示意图中假设用户发起的分组交换(PS) 域的PoC业务,并且RRC (无线资源控制)连接建立在专用信道(DCH)上。 Following is a brief call setup procedure in a UMTS system, to the mobile station (UE) call as an example, the call setup process shown in Figure 1. Figure UMTS system included in several main functional entities: the user terminal (UE) , the base station (the NodeB), a radio network controller (RNC) and a core network (the CN), in addition, the diagram is assumed that the PoC service user initiates a packet switched (PS) domain, and an RRC (radio resource control) connection establishment in a dedicated the channel (DCH). 对于主叫端,呼叫建立过程一般包括以下几个主要步骤:1) RRC连接建立过程;2) NAS (非接入层)信令连接建立和NAS信令交互过程;3) RAB (无线接入承载)建立过程。 For the calling terminal, the call establishment procedure generally includes the following major steps: 1) RRC connection establishment procedure; 2) NAS (Non Access Stratum) signaling and NAS connection establishment signaling interaction process; 3) RAB (Radio Access bearer) establishment procedure. 下面进一步分析各个过程-RRC(无张资源控制)连接建立的目的是在UE和UTRAN (UMTS陆地无线接入网,包括若干个RNC和NodeB)建立专用的信令连接通道,以在空中接口(UU)传送UE与UTRAN以及UE与CN之间交互的信令。 Further analysis of each procedure below - RRC (no photos Resource Control) connection is established purpose of the UE and UTRAN (UMTS terrestrial radio access network, comprising a plurality of RNC and NodeB) to establish a dedicated signaling connection passage to the air interface ( UU) transmitting UE and the UTRAN and the interaction between the UE and the CN signaling. 图1中的虚线框phasel:RRC连接建立:描述的是处于空闲模式(Idle Mode)下的UE发起的RRC连接建立过程,UE首先发送RRC连接建立请求(RRC Connection Request)消息,该消息在上行公共传输信道RACH (随机接入信道)上发送,实际上,在发送该消息之前,UE的物理层需要先发送PRACH preamble (物理层随机接入信道的功率控制前导) 进行接入尝试,如果接入成功,则发送RRC连接建立消息。 Phasel dashed box in FIG. 1: RRC connection establishment: UE is in idle mode (Idle Mode) under initiated RRC connection establishment procedure described, UE first transmits RRC connection request (RRC Connection Request) message, which uplink common transport channel RACH (random access channel) transmitted on the fact, before sending the message, the physical layer of the UE have to send a PRACH preamble (random access channel physical layer power control preamble) for the access attempt, then if the successful RRC connection setup message is sent. RNC收到RRC连接建立请求消息后判决是否允许该UE接入,如果允许,则分配相关资源并配置NodeB,该配置过程包括无线链路(RL)建立、IUB接口(RNC与NodeB接口)数据传输承载(ALCAP,接入链路控制协议) 建立、IUB接口帧协议(FP)同步等过程。 RNC after receiving the RRC connection establishment request message to the decision whether to allow the UE to access, if allowed, the NodeB allocate resources and configuration, the configuration includes a radio link (RL) established, the IUB interfaces (RNC and the NodeB Interface) data transmission carrier (ALCAP, access link control protocol) to establish, IUB interface frame protocol (FP) synchronization process. RNC配置好NodeB后,开始配置RNC内部实体,如3建立无线链路控制(RLC)和媒体接入控制(MAC)实体等,然后通过公共传输信道FACH (前向接入信道)发送RRC连接建立(RRC Connection Setup)消息,UE收到该消息后配置本端的RLC、 MAC和物理层,然后进行专用物理信道的同步过程(LI Synchronisation),待同步过程完成后,UE通过上行专用信道(DCH)发送RRC连接建立完成(RRC Connection Setup Complete)消息,至此RRC连接建立成功。 After the NodeB configured RNC, RNC begin configuring internal entity, such as the establishment of a radio link 3 Control (RLC) and Media Access Control (MAC) entity and the like, and then transmit the RRC connection established through the common transport channel FACH (Forward Access Channel) (RRC Connection Setup) message, the UE after receiving the message RLC configuration this end, MAC, and physical layer, and then the synchronization process dedicated physical channel (LI Synchronisation), until the synchronization process is completed, the UE through an uplink dedicated channel (DCH) send RRC connection setup complete (RRC connection Setup complete) message, bringing the RRC connection is established. 协议分析和测试表明,RRC连接建立时延主要包括随机接入过程、RRC Connection Request消息发送、RNC配置NodeB过程、RRC Connection Set叩消息的发送、物理层同步、RRC Connection Setup Complete消息发送等引入的时延。 Protocol analysis and tests show that, the RRC connection establishment delay including the random access procedure, RRC Connection Request message, the RNC NodeB configuration procedure, RRC Connection Set rapping message transmitted, the physical layer synchronization, the introduction message RRC Connection Setup Complete like delay. NAS信令连接建立的目的是在UE和CN之间建立信令交互的通道,NAS信令连接建立和信令交互如图1中虚线框phase2: NAS信令:主要包括业务请求(Service Request)、 IU接口(RNC与CN之间接口)信令连接控制部分(SCCP)建立、鉴权和加密、安全模式(SecurityMode) 设置、TMSI (临时移动用户标识)重分配、PDP (分组数据协议)激活请求等过程。 NAS signaling connection establishment purpose is to establish a channel between the UE and the CN signaling interaction, and the NAS signaling connection establishment signaling interaction as shown in the dashed box 1 Phase2: NAS signaling: including service request (Service Request) , IU interface (an interface between the RNC and CN) signaling connection control part (SCCP) establishment, authentication and encryption, security mode (the SecurityMode) is provided, the TMSI (temporary mobile Subscriber identity) reallocation, the PDP (packet data protocol) activation requests and other processes. 根据协议, NAS信令中的鉴权和加密、TMSI重分配等过程可选,在后面的描述中,我们主要描述必选的过程。 According to the agreement, the NAS signaling encryption and authentication, the TMSI reallocation procedure, etc. Alternatively, in the description which follows, we will be selected primarily described process. 注意:图1描述的是PS域会话建立过程中的NAS信令,对于CS (电路交换)域的呼叫建立过程,NAS具体信令稍有不同,不过从分析NAS信令过程时延角度出发,CS域和PS域基本一致。 Note: Figure 1 depicts a PS domain session establishment procedure of the NAS signaling, call for the CS (circuit switched) domain establishment process, particularly NAS signaling slightly different, however, from the analysis of the NAS signaling process delay angle, basically the same CS and PS domains. 协议分析和测试表明,NAS信令连接建立时延主要包括业务请求(Service Request) 消息发送、信令连接控制协议(SCCP)连接建立、Security Mode设置、PDP激活请求(用于PS 域的业务)/SETUP (用于CS域呼叫)消息发送等引入的时延。 Protocol analysis and tests show, the NAS signaling connection establishment delay include a service request (Service Request) message, a signaling connection control protocol (SCCP) connection is established, Security Mode setting, the PDP activation request (service for the PS domain) introducing delay / SETUP message sent and so on (for the CS call). 在NAS信令连接建立完成后开始RAB建立过程,如图1中虚线框phase3:无线接入承载的建立:CN发送RAB指派请求(RAB Assignment Request)消息给RNC, RNC收到该消息后进行RAB到RB (无线承载)的映射,然后对NodeB进行RL重配置、ALCAP建立、FP同步等操作,然后发送RB建立(RB Setup)消息给UE, UE收到该消息后配置本端的RLC、 MAC和物理层,然后UE发送RB建立完成(RB Setup Complete)消息给RNC, RNC在配置好本端的RLC、 MAC之后发送RAB指派响应(RAB Assignment Response)消息通知CN侧RAB建立成功,CN 收到该消息后发送接收PDP激活(Activate PDP Context Acc印t)消息给UE,通知UE可以开始数据的发送了,至此,RAB建立成功。 CN sends performed after RAB RAB assignment request (RAB Assignment Request) message to the RNC, RNC receives the message: The NAS signaling connection establishment is completed after the start RAB establishment procedure, as shown in the dashed box Phase3: establishing a radio access bearer the RB (radio bearer) mapping, then NodeB for RL reconfiguration, the ALCAP established, the FP synchronization, and then transmits the established RB (RB the Setup) message to the UE, UE receives RLC configuration of the local end after the message, MAC, and the physical layer, the UE then transmits RB setup complete (RB Setup complete) message to the RNC, RNC in configure this end the RLC, after the MAC transmits an RAB assignment response (RAB assignment response) message to inform the CN side RAB establishment success, CN receives the message after transmission and reception PDP activation (activate PDP Context Acc printed t) message to the UE, the data transmission start notification may be a UE, and to this, an RAB is established successfully. 可见,现有技术中的呼叫建立过程涉及到的信令过程比较多,结果造成呼叫建立时延较长,资料和测试表明,UMTS系统中的呼叫建立时延比GSM系统(第二代移动通信系统)还要长,因此,对于一些对呼叫建立时延比较敏感的业务,有必要降低UMTS系统的呼叫建立时延, 以提高用户的满意度。 Be seen, the prior art call setup procedure involves more signaling procedures, resulting in longer call setup delays, data and tests show that, UMTS call setup delay in the system than the GSM system (second generation mobile communication system) much longer, therefore, for some of the call set-up latency sensitive business, it is necessary to reduce call setup delay UMTS system to improve customer satisfaction. 发明内容本发明所要解决的技术问题在于提供一种快速的呼叫建立方法,以降低呼叫建立时延。 SUMMARY OF THE INVENTION The technical problem to be solved is to provide a quick method for establishing a call, in order to reduce call setup delay. 为了解决上述技术问题,本发明所采用的技术方案是:提供一种移动通信系统中快速呼叫建立的方法,包括:RRC连接建立:NAS信令连接建立和NAS信令交互;RAB无线接入承载,其特点是,UE向RNC发送RRC连接请求消息,该连接请求消息中封装有NAS消息;RNC在收到RRC请求消息并解析后,就可以将NAS消息转发给CN, CN根据NAS消息就可以发送无线接入承载分配请求消息给RNC,并且开始对被叫进行寻呼;用于分组交换PS域呼叫时,所述NAS消息为业务请求和分组数据协议PDP激活请求;用于电路交换CS域呼叫时,所述NAS消息为业务请求和SETUP消息。 To solve the above technical problem, the technical solution employed in the present invention are: to provide a mobile communication system fast call establishment method, comprising: the RRC connection establishment: NAS and NAS signaling connection establishment signaling interaction; an RAB Radio Access Bearer , which is characterized, the UE transmits to the RNC an RRC connection request message, the connection request message is encapsulated in the NAS message; RNC after receiving the RRC request message and parse the NAS message can be forwarded to the CN, CN according to the NAS message can transmitting a radio access bearer assignment request message to the RNC, and begin paging the called; PS domain for packet switched call, the NAS message is a service request and packet data protocol PDP activation request; for CS domain call, the NAS message is a SETUP message and a service request. 这样处理的优势可以减少信令的交互,同时CN提早下发RAB分配请求消息给RNC, RNC收到CN分配请求消息后,可以完成消息的解析和配置的转换。 Such treatment may reduce the advantage of signaling interaction, while earlier issued CN RAB Assignment Request message to the RNC, the RNC receives CN assignment request message, and the configuration can be resolved to complete the conversion of the message. 并且可以提早发送寻呼,縮短接续时延,从而提高终端用户的满意度。 And may transmit the paging early, shortening the connection delay, thereby improving end-user satisfaction. 附图说明图1是现有的主叫端用户呼叫建立方法的流程图。 BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flowchart illustrating a conventional method for establishing a call of the calling terminal user. 图2是本发明的主叫端用户呼叫建立方法的流程图。 FIG 2 is a flowchart of a user of the calling terminal according to the present invention, a method of call setup. 具体实施方式如图2所示:本发明的主叫端用户呼叫建立方法包括如下步骤:步骤A: RRC连接建立:步骤B: UE与CN之间的NAS信令连接建立和NAS信令交互; 步骤C: RAB无线接入承载。 DETAILED DESCRIPTION Figure 2: calling terminal according to the present invention, the user call setup method comprising the steps of: Step A: RRC connection establishment: Step B: NAS signaling between the UE and the CN and the NAS connection establishment signaling interaction; step C: RAB radio access bearer. 所述步骤A具体包括如下步骤:步骤A1: UE向RNC发送RRC连接请求消息,该消息中封装有NAS消息(即业务请求和PPD 激活请求/SETUP消息);步骤A2: RNC分配相关资源并配置Node B;具体包括:RNC向NodeB发送无线链路建立请求;NodeB向RNC返回无线链路建立响应;RNC向NodeB发送数据传输承载建立请求;NodeB 向RNC返回数据传输承载建立确定;RNC向NodeB发送下行链路同步信息;NodeB向RNC发送上行链路同步信息;步骤A3: RNC向CN发送业务请求消息;步骤A4: RNC与CN之间建立SCCP连接;具体包括:CN向RNC发送SCCP连接请求;RNC与CN返回SCCP连接确定。 Said step A includes the following steps: Step A1: UE sends an RRC connection request message to the RNC, the message is encapsulated in the NAS message (i.e., request and service activation request PPD / SETUP message); Step A2: RNC allocating resources and configure Node B; comprises: RNC to the NodeB transmits a radio link establishment request; NodeB returns radio link Setup response to the RNC; RNC transmits a data transmission bearer setup request to the NodeB; reverse data transmission NodeB to the RNC determines the bearer establishment; RNC sending to the NodeB downlink synchronization information; the NodeB transmits uplink synchronization information of the uplink to the RNC; step A3: RNC sends a service request message to the CN; step A4: SCCP connection established between the RNC and the CN; comprises: CN sending SCCP connection request to the RNC; CN SCCP connection with the RNC returns OK.

步骤A5: RNC向CN发送PDP激活请求(用于PS域呼叫)或者发布SETUP(用于CS域呼叫) 消息。 Step A5: RNC sends a PDP activation request (for the PS domain call) or release the SETUP (for the CS call) message to the CN.

步骤A6: CN向RNC发送公共(common) ID; Step A6: CN transmits a common (common) ID to the RNC;

步骤A7: CN向RNC发送无线接入承载分配请求; Step A7: CN sending a radio access bearer assignment request to the RNC;

步骤A8: RNC向UE发送RRC连接建立消息; Step A8: RNC sends an RRC connection setup message to the UE;

步骤A9: UE收到消息后配置本端的RLC、 MAC和物理层,然后进行专用物理信道的同步, 等同步完成后,UE发送RRC连接建立完成消息,至此RRC连接建立成功所述步骤B具体包括: Step A9: after receiving the message configuration of the present side RLC, MAC and the physical layer, and a dedicated physical channel synchronizing the UE, etc. After synchronization, the UE sends an RRC connection setup complete message, thus an RRC connection is successfully established said step B comprises :

步骤B1:认证和加密;该步骤为可选步骤;具体包括:CN向UE发送认证和加密请求, Step B1: authentication and encryption; this step is optional; specifically includes: CN sending a request to the UE authentication and encryption,

UE向CN返回认证和加密响应; UE returns the CN a response to the authentication and encryption;

步骤B2:安全模式设置;具体包括:CN向UE发送安全模式命令,UE向CN返回安全模式完成消息; Step B2: set the security mode; specifically includes: CN sends a security mode command to the UE, UE returns security mode complete message to the CN;

步骤B3: TMSI重分配;该步骤为可选步骤。 Step B3: TMSI reallocation; This step is optional. 具体包括:CN向UE发送TMSI重分配命令, UE向CN返回TMSI重分配完成消息; 所述步骤C具体包括: Comprises: CN sends a TMSI reallocation command to the UE, UE returns TMSI reallocation complete message to the CN; step C comprises:

步骤CI: RNC收到无线接入承载分配请求后,进行无线链路重构。 Step CI: RNC after receiving a radio access bearer assignment request, the radio link reconstruction. 具体包括:RNC向NodeB 发送无线链路重构请求;NodeB向RNC发送无线链路重构准备消息;認C向NodeB发送无线链路重构命令; Comprises: RNC sends a radio link reconstruction request to the NodeB; NodeB transmits a radio link ready message to the RNC reconstructed; C transmits a radio link to recognize a command to reconstruct the NodeB;

步骤C2:数据传输承载的建立和同步; Step C2: establishing a data transmission and synchronous bearer;

步骤C3: RNC发送无线承载建立消息给UE; Step C3: RNC sends a radio bearer setup message to the UE;

步骤C4: UE发送无线承载建立完成消息给RNC。 Step C4: UE sends a radio bearer setup complete message to the RNC.

综上所述,本发明与图l所示的现有方法相比,主要区别和优势在于: In summary, compared with the conventional method and the present invention shown in FIG. L, and the main difference advantages:

(1) 、简化主叫UE与CN之间的NAS信令,去掉业务请求、PDP激活请求/SETUP消息。 (1), a simplified NAS signaling between the calling UE and the CN, to remove the service request, the PDP activation request / SETUP message. 简化之后的NAS信令主要包括鉴权、加密、安全模式、TMSI重分配等过程消息。 After the NAS signaling simplified include authentication, encryption, security mode, etc. the TMSI reallocation procedure message. 而且鉴权、加密、TMSI重分配过程又可作为可选消息。 Furthermore authentication, encryption, but also the TMSI reallocation procedure as an optional message. 实际上必选消息只有安全模式了。 In fact Required message only safe mode. 这样处理的优势在于縮短NAS信令交互的时延。 Advantage of this treatment is to shorten the NAS signaling interaction delay.

(2) 、修改主叫RRC连接请求消息,在该消息中封装NAS消息(即业务请求和PDP激活请求/SETUP消息),这样RNC在收到RRC请求消息并解析后,就可以将业务请求和PDP激活请求/SETUP消息转发给CN。 (2) modifying the calling RRC connection request message, the NAS message package (i.e. PDP activation request and the service request / SETUP message), so that the RNC after receiving the RRC request message and parsing the service request can be in the message and PDP activation request / forwards the SETUP message to the CN. (3) 、 CN根据业务请求和PDP激活请求/SETUP消息就可以发送RAB指派消息给RNC并且开始对被叫进行寻呼。 (3), CN according to the service request and the PDP activation request / SETUP message may send an RAB assignment message to the called RNC and starts paging.

Claims (5)

1、一种移动通信系统中快速呼叫建立的方法,包括:RRC连接建立:非接入层NAS信令连接建立和NAS信令交互;RAB无线接入承载;其特征在于,移动台UE向RNC发送RRC连接请求消息,该连接请求消息中封装有NAS消息;RNC在收到RRC请求消息并解析后,就可以将NAS消息转发给核心网CN,CN根据NAS消息就可以发送无线接入承载分配请求消息给RNC,并且开始对被叫进行寻呼;用于分组交换PS域呼叫时,所述NAS消息为业务请求和分组数据协议PDP激活请求;用于电路交换CS域呼叫时,所述NAS消息为业务请求和SETUP消息。 1. A method for a communication system fast call setup movement, comprising: the RRC connection establishment: a non-access stratum (NAS) signaling and NAS connection establishment signaling interaction; an RAB radio access bearer; wherein, the mobile station UE to the RNC sends an RRC connection request message, the connection request message is encapsulated in the NAS message; the RNC after receiving the RRC request message and parsing may forward the NAS message to the core network CN, CN may send a radio access bearer assignment message according to the NAS request message to the RNC, and begin paging the called; PS domain for packet switched call, the NAS message is a service request and packet data protocol PDP activation request; when used in the CS domain call, the NAS message is a SETUP message and a service request.
2、 根据权利要求1所述的移动通信系统中快速呼叫建立的方法,其特征在于,所述的RRC建立步骤具体包括:步骤A1: UE向RNC发送RRC连接请求消息,该消息中封装有NAS消息;步骤A2: RNC分配相关资源并配置Node B;步骤A3: RNC向CN发送业务请求消息;步骤A4: RNC与CN之间建立SCCP连接;步骤A5:用于分组交换PS域呼叫时,RNC向CN发送PDP激活请求;用于电路交换CS域呼叫时,发布SETUP消息;步骤A6: CN向RNC发送common ID;步骤A7: CN向RNC发送无线接入承载分配请求;步骤A8: RNC向UE发送RRC连接建立消息;步骤A9: UE收到消息后配置本端的RLC、 MAC和物理层,然后进行专用物理信道的同步,等同步完成后,UE发送RRC连接建立完成消息,至此RRC连接建立成功。 2. The method of claim 1 mobile communication system fast call setup as claimed in claim, wherein said step of establishing an RRC specifically includes: Step A1: UE sends an RRC connection request message to the RNC, the NAS message encapsulates message; step A2: RNC configuration and allocation of resources Node B; step A3: RNC sends a service request message to the CN; step A4: SCCP connection established between the RNC and the CN; step A5: when a call for packet switched PS domain, RNC CN PDP activation request to send; is used in the CS domain call, release the SETUP message; step A6: CN sending common ID to the RNC; step A7: CN sending a radio access bearer assignment request to the RNC; step A8: RNC to the UE sends an RRC connection setup message; step A9: UE configuration of the present side RLC, MAC and the physical layer after receiving the message, and a dedicated physical channel synchronization Once synchronization is complete, the UE sends an RRC connection setup complete message, thus an RRC connection is successfully established .
3、 根据权利要求1所述的移动通信系统中快速呼叫建立的方法,其特征在于,所述NAS信令连接建立和NAS信令交互步骤包括:安全模式设置。 3. The method of claim 1 mobile communication system fast call setup as claimed in claim, wherein the NAS and NAS signaling connection establishment signaling interaction comprises: security mode setting.
4、 根据权利要求3所述的移动通信系统中快速呼叫建立的方法,其特征在于,所述NAS信令连接建立和NAS信令交互步骤还包括:认证和加密步骤;TMSI重分配步骤。 4. The mobile communication system according to claim 3, the fast call setup request, wherein the NAS and NAS signaling connection establishment signaling interaction step further comprises: authentication and encryption steps; the TMSI reallocation procedure.
5、 根据权利要求1所述的移动通信系统中快速呼叫建立的方法,其特征在于,所述RAB无线接入承载步骤具体包括-RNC收到无线接入承载分配请求后,进行无线链路重构;数据传输承载的建立和同步;RNC发送无线承载建立消息给UE;UE发送无线承载建立完成消息给RNC。 5. The method of claim 1 mobile communication system fast call setup as claimed in claim, wherein the radio access bearer RAB step comprises the -RNC receives a radio access bearer assignment request, the radio link reconfiguration configuration; and establishing synchronous data transmission bearer; the RNC sends a radio bearer setup message to the UE; UE sends a radio bearer setup complete message to the RNC.
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