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JP4725312B2 - Mobile communication system, radio network controller, and call connection time shortening method - Google Patents

Mobile communication system, radio network controller, and call connection time shortening method Download PDF

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JP4725312B2
JP4725312B2 JP2005359681A JP2005359681A JP4725312B2 JP 4725312 B2 JP4725312 B2 JP 4725312B2 JP 2005359681 A JP2005359681 A JP 2005359681A JP 2005359681 A JP2005359681 A JP 2005359681A JP 4725312 B2 JP4725312 B2 JP 4725312B2
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憲幸 大峯
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NEC Corp
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Description

本発明は移動体通信システム、無線ネットワーク制御装置及びそれらに用いる呼接続時間短縮方法に関し、特にCDMA(Code Division Multiple Access)移動体通信システムの無線ネットワーク制御装置に関する。   The present invention relates to a mobile communication system, a radio network control apparatus, and a call connection time shortening method used therefor, and more particularly, to a radio network control apparatus for a CDMA (Code Division Multiple Access) mobile communication system.

従来、この種の移動体通信システムにおいては、移動体端末[以下、UE(User Equipment)とする]が発呼するために、まず移動管理[以下MM(Mobility Management)とする]と、呼制御[以下、CC(Call Control)とする]とを転送するためのシグナリングコネクション(制御プレーン:C−Plane)を確立する必要がある(例えば、特許文献1,2参照)。   Conventionally, in this type of mobile communication system, since a mobile terminal [hereinafter referred to as UE (User Equipment)] makes a call, first, mobility management (hereinafter referred to as MM (Mobility Management)) and call control are performed. It is necessary to establish a signaling connection (control plane: C-Plane) for transferring [hereinafter referred to as CC (Call Control)] (see, for example, Patent Documents 1 and 2).

シグナリングコネクションは、RRC(Radio Resource Control:無線リソース制御)コネクションと、SCCPコネクションとから構成されている(例えば、特許文献1,2参照)。このシグナリングコネクションのうちのRRCコネクション確立までの手順を図4を参照して説明する。   The signaling connection includes an RRC (Radio Resource Control) connection and an SCCP connection (see, for example, Patent Documents 1 and 2). The procedure up to the establishment of the RRC connection in this signaling connection will be described with reference to FIG.

無線ネットワーク制御装置[以下、RNC(Radio Network Controller)とする]はUEからRRC接続要求メッセージ[CCCH(Common Control Channel:共通制御チャネル)(論理チャネル),RACH(Random Access Channel:ランダムアクセスチャネル)(トランスポートチャネル),PRACH(Physical Random Access Channel:ランダムアクセス物理チャネル)(物理チャネル)]がくると(図4のc1)、RRCコネクションをDCH(トランスポートチャネル)で確立するため、基地局(NodeB)との間で、NBAP(Node B Application Part):無線リンクの設定(図4のc2,c3)、及びALCAP(Access Link Control Application Part):AAL2[ATM(Asynchronous Transfer Mode) Adaptation Layer type 2]コネクションを確立する(図4のc4,c5)。   A radio network controller [hereinafter referred to as RNC (Radio Network Controller)] receives an RRC connection request message [CCCH (Common Control Channel) (logical control channel), RACH (Random Access Channel) (random access channel) ( Transport channel), PRACH (Physical Random Access Channel) (physical channel)] (c1 in FIG. 4), the RRC connection is established with the DCH (transport channel), so that the base station (NodeB ) NBAP (Node B Application Part): wireless link setting (c2, c3 in FIG. 4) And ALCAP (Access Link Control Application Part): AAL2 [ATM (Asynchronous Transfer Mode) Adaptation Layer type 2] establishing a connection (c4 in FIG. 4, c5).

その後に、RNCはRRC接続設定メッセージ(RRC Connection Setup)[CCCH,FACH(Forward Access Channel:下りアクセスチャネル)(トランスポートチャネル)、S−CCPCH(Secondary Common Control Physical Channel:2次共通制御物理チャネル)(物理チャネル)]をUEに送信する(図4のc6)。   Thereafter, the RNC performs an RRC connection setup message (RRC Connection Setup) [CCCH, FACH (Forward Access Channel) (transport channel), S-CCPCH (Secondary Common Control Physical Channel: secondary common control physical channel). (Physical channel)] is transmitted to the UE (c6 in FIG. 4).

UEはRRC接続設定メッセージを受信すると、RRC接続完了メッセージ(RRC Connection Setup Complete)[DCCH(Dedicated Control Channel:個別制御チャネル)(論理チャネル),DCH(Dedicated Channel:個別チャネル)(トランスポートチャネル),DPDCH(Dedicated Physical Data Channel:個別物理データチャネル)(物理チャネル)]を送信する(図4のc8)。   Upon receiving the RRC connection setup message, the UE receives an RRC connection complete message (RRC Connection Setup Complete) [DCCH (Dedicated Control Channel) (logical channel), DCH (Dedicated Channel) (transport channel), DPDCH (Dedicated Physical Data Channel) (physical channel)] is transmitted (c8 in FIG. 4).

特開2002−199440号公報JP 2002-199440 A 特開2005−252828号公報JP 2005-252828 A

しかしながら、上述した従来のRRCコネクション確立手順では、RNCが、NBAP:無線リンク設定、及びALCAP:AAL2コネクションの確立を待ってからRRC接続設定(RRC Connection Setup)メッセージを送信するため、遅延が発生し、接続が完了するまでに時間がかかってしまうという問題がある。   However, in the conventional RRC connection establishment procedure described above, a delay occurs because the RNC transmits an RRC connection setup message after waiting for the establishment of the NBAP: radio link setup and ALCAP: AAL2 connection. There is a problem that it takes time to complete the connection.

そこで、本発明の目的は上記の問題点を解消し、移動体端末から発信されてきた呼に対して接続が完了するまでにかかる時間を短縮することができる移動体通信システム、無線ネットワーク制御装置及びそれらに用いる呼接続時間短縮方法を提供することにある。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems and reduce the time required for completing the connection for a call transmitted from a mobile terminal, and a mobile communication system and a radio network control device Another object of the present invention is to provide a call connection time shortening method used for them.

本発明による移動体通信システムは、少なくとも移動体端末と基地局と無線ネットワーク制御装置とから構成され、前記移動体端末が発呼する際に、移動管理と呼制御とを転送するためにシグナリングコネクションの無線リソース制御コネクションを確立する移動体通信システムであって、
前記無線ネットワーク制御装置は、前記基地局に対するNBAP(Node B Application Part):無線リンク設定手順の開始と同時に、前記無線リソース制御コネクションの接続要求を行った前記移動体端末に前記無線リソース制御コネクションの接続設定メッセージを送信し、前記NBAP:無線リンク設定手順及びALCAP(Access Link Control Application Part):AAL2[ATM(Asynchronous Transfer Mode) Adaptation Layer type 2]コネクション設定手順を前記無線リソース制御コネクションの接続要求を行った前記移動体端末側の処理と並行して実行する手段を備えている。
A mobile communication system according to the present invention comprises at least a mobile terminal, a base station, and a radio network controller, and a signaling connection for transferring mobility management and call control when the mobile terminal makes a call. A mobile communication system for establishing a radio resource control connection of
The radio network controller is configured to transmit the radio resource control connection to the mobile terminal that has made a connection request for the radio resource control connection simultaneously with the start of a radio link setting procedure, NBAP (Node B Application Part) for the base station. A connection setup message is transmitted, and the NBAP: radio link setup procedure and ALCAP (Access Link Application Part): AAL2 [ATM (Asynchronous Transfer Mode) connection request procedure for connection setup of the radio layer type connection connection request. Means for executing in parallel with the processing performed on the mobile terminal side is provided.

本発明による無線ネットワーク制御装置は、移動体端末が発呼する際に、移動管理と呼制御とを転送するためにシグナリングコネクションの無線リソース制御コネクションを確立する移動体通信システムを、少なくとも前記移動体端末と基地局とともに構成する無線ネットワーク制御装置であって、
前記基地局に対するNBAP(Node B Application Part):無線リンク設定手順の開始と同時に、前記無線リソース制御コネクションの接続要求を行った前記移動体端末に前記無線リソース制御コネクションの接続設定メッセージを送信し、前記NBAP:無線リンク設定手順及びALCAP(Access Link Control Application Part):AAL2[ATM(Asynchronous Transfer Mode) Adaptation Layer type 2]コネクション設定手順を前記無線リソース制御コネクションの接続要求を行った前記移動体端末側の処理と並行して実行する手段を備えている。
A radio network control apparatus according to the present invention comprises at least a mobile communication system that establishes a radio resource control connection of a signaling connection to transfer mobility management and call control when a mobile terminal makes a call. A wireless network control device configured with a terminal and a base station,
NBAP (Node B Application Part) for the base station: simultaneously with the start of a radio link setting procedure, a connection setting message for the radio resource control connection is transmitted to the mobile terminal that has made a connection request for the radio resource control connection; The NBAP: radio link setting procedure and ALCAP (Access Link Application Part): AAL2 [ATM (Asynchronous Transfer Mode) Adaptation Layer type 2] The connection request of the radio resource control connection is made by the connection request of the radio resource control connection Means for executing in parallel with the above processing.

本発明による呼接続時間短縮方法は、少なくとも移動体端末と基地局と無線ネットワーク制御装置とから構成され、前記移動体端末が発呼する際に、移動管理と呼制御とを転送するためにシグナリングコネクションの無線リソース制御コネクションを確立する移動体通信システムに用いる呼接続時間短縮方法であって、
前記無線ネットワーク制御装置が、前記基地局に対するNBAP(Node B Application Part):無線リンク設定手順の開始と同時に、前記無線リソース制御コネクションの接続要求を行った前記移動体端末に前記無線リソース制御コネクションの接続設定メッセージを送信し、前記NBAP:無線リンク設定手順及びALCAP(Access Link Control Application Part):AAL2[ATM(Asynchronous Transfer Mode) Adaptation Layer type 2]コネクション設定手順を前記無線リソース制御コネクションの接続要求を行った前記移動体端末側の処理と並行して行う処理を実行している。
The call connection time shortening method according to the present invention comprises at least a mobile terminal, a base station, and a radio network controller, and performs signaling for transferring mobility management and call control when the mobile terminal makes a call. A call connection time shortening method used in a mobile communication system for establishing a radio resource control connection of a connection,
The radio network control device sends an NBAP (Node B Application Part) for the base station to the mobile terminal that has made a connection request for the radio resource control connection simultaneously with the start of the radio link setting procedure. A connection setup message is transmitted, and the NBAP: radio link setup procedure and ALCAP (Access Link Application Part): AAL2 [ATM (Asynchronous Transfer Mode) connection request procedure for connection setup of the radio layer type connection connection request. running a process performed in parallel with the mobile terminal side of the processing performed.

すなわち、本発明の移動体通信システムは、移動体端末[以下、UE(User Equipment)とする]が無線ネットワーク制御装置[以下、RNC(Radio Network Controller)とする]に対してRRC(Radio Resource Control:無線リソース制御)メッセージを送受信する手段を有し、基地局(NodeB)がRNCに対してNBAP(Node B Application Part)メッセージ及びALCAP(Access Link Control Application Part)メッセージを送受信する手段を有し、RNCがUE及び基地局に対してRRCメッセージ、NBAPメッセージ、及びALCAPメッセージを送受信する手段を有している。   That is, in the mobile communication system of the present invention, a mobile terminal [hereinafter referred to as UE (User Equipment)] is a radio network controller [hereinafter referred to as RNC (Radio Network Controller)] and RRC (Radio Resource Control). : Radio resource control) means for transmitting and receiving messages, and the base station (Node B) has means for transmitting and receiving NBAP (Node B Application Part) messages and ALCAP (Access Link Control Part) messages to the RNC, The RNC has means for transmitting and receiving RRC messages, NBAP messages, and ALCAP messages to the UE and the base station.

本発明の特徴は、RNCにおいて、UEから発信されてきた呼に対して、接続が完了するまでにかかる時間を短縮することにある。UEが発呼するためには、まず移動管理「以下、MM(Mobility Management)とする]と、呼制御[以下、CC(Call Control)とする]とを転送するためのシグナリングコネクション(制御プレーン:C−Plane)を確立する必要がある。シグナリングコネクションは、RRCコネクションとSCCPコネクションとから構成されている。   The feature of the present invention is to shorten the time required for the connection to be completed for the call sent from the UE in the RNC. In order for a UE to place a call, first, a signaling connection (control plane: control plane: MM (Mobility Management) hereinafter) and call control [CC (Call Control) hereinafter) are transferred. C-Plane) needs to be established, and the signaling connection is composed of an RRC connection and an SCCP connection.

RRCコネクションの確立には、UEがRNCにRRC接続要求メッセージ(RRC Connection Request)を送信し、そのメッセージを受信したRNCがUEにRRC接続設定メッセージ(RRC Connection Setup)を返し、さらにUEがRNCにRRC接続設定完了メッセージ(RRC Connection Setup Complete)を返すことによって、RRCコネクションが確立される。   To establish an RRC connection, the UE transmits an RRC connection request message (RRC Connection Request) to the RNC, and the RNC that has received the message returns an RRC connection setup message (RRC Connection Setup) to the UE. An RRC connection is established by returning an RRC connection setup completion message (RRC Connection Setup Complete).

UEは、CCCH(Common Control Channel:共通制御チャネル)(論理チャネル)にRRC接続要求メッセージを送信する。CCCHは、RACH(Random Access Channel:ランダムアクセスチャネル)(トランスポートチャネル)、PRACH(Physical Random Access Channel:ランダムアクセス物理チャネル)(物理チャネル)に多重される。   The UE transmits an RRC connection request message to a CCCH (Common Control Channel) (logical channel). The CCCH is multiplexed on a RACH (Random Access Channel) (transport channel) and a PRACH (Physical Random Access Channel) (physical channel).

RNCは、CCCHにRRC接続設定メッセージを送信する。CCCHは、FACH(Forward Access Channel:下りアクセスチャネル)(トランスポートチャネル)、S−CCPCH(Secondary Common Control Physical Channel:2次共通制御物理チャネル)(物理チャネル)に多重される。   The RNC transmits an RRC connection setup message to the CCCH. The CCCH is multiplexed on a FACH (Forward Access Channel) (transport channel) and an S-CCPCH (Secondary Common Control Physical Channel) (physical channel).

UEは、DCCH(Dedicated Control Channel:個別制御チャネル)(論理チャネル)にRRC接続完了メッセージを送信する。DCCHは、DCH(Dedicated Channel:個別チャネル)(トランスポートチャネル)、DPDCH(Dedicated Physical Data Channel:個別物理データチャネル)(物理チャネル)に多重される。   The UE transmits an RRC connection completion message to a DCCH (Dedicated Control Channel) (logical channel). The DCCH is multiplexed on a DCH (Dedicated Channel) (transport channel) and a DPDCH (Dedicated Physical Data Channel) (physical channel).

UEがDCH(トランスポートチャネル)にRRC接続完了メッセージを送信するためには、RNCがRRCコネクションをDCHで確立するための無線リソースの割り当て(NBAP:無線リンク設定手順)と、DCH用のAAL2[ATM(Asynchronous Transfer Mode) Adaptation Layer type 2]コネクションの確立(ALCAP:AAL2コネクション設定手順)を完了している必要がある。   In order for the UE to transmit an RRC connection completion message to the DCH (transport channel), the RNC allocates radio resources for establishing the RRC connection with the DCH (NBAP: radio link setting procedure), and the AAL2 [ An ATM (Asynchronous Transfer Mode) Adaptation Layer type 2] connection establishment (ALCAP: AAL2 connection setting procedure) needs to be completed.

そのため、従来は、図4に示すように、NBAP:無線リンク設定手順(NBAP:Radio Link Setup Request〜NBAP:Radio Link Setup Response)、及びALCAP:AAL2コネクション設定手順(ALCAP:Establish Request〜ALCAP:Establish Confirm)が完了した後に、RNCがUEにRRC接続設定メッセージを送信し、RRC接続設定メッセージを受信したUEがRNCにRRC接続完了メッセージを送信している。   Therefore, conventionally, as shown in FIG. 4, NBAP: Radio Link Setup Procedure (NBAP: Radio Link Setup Request to NBAP: Radio Link Setup Response) and ALCAP: AAL2 Connection Setup Procedure (ALCAP: Establish Request to LCAPE After (Confirm) is completed, the RNC transmits an RRC connection setup message to the UE, and the UE that has received the RRC connection setup message transmits an RRC connection completion message to the RNC.

本発明の移動体通信システムでは、図2に示すように、RNCがNBAP:無線リンク設定手順の開始(NBAP:Radio Link Setup Request)と同時に、UEにRRC接続設定メッセージを送信することで、NBAP:無線リンク設定手順、及びALCAP:AAL2コネクション設定手順と並行して、RRC接続処理を行い、UEからのRRC接続完了メッセージ受信よりも先にNBAP:無線リンク設定手順、及びALCAP:AAL2コネクション設定手順を完了しているため、UEがDCHにRRC接続完了メッセージを送信することが可能となり、接続が完了するまでにかかる時間を短縮することが可能となる。   In the mobile communication system according to the present invention, as shown in FIG. 2, the RNC transmits an RRC connection setup message to the UE simultaneously with the start of the NBAP: Radio Link Setup Procedure (NBAP), whereby the NBAP : Radio link setup procedure and ALCAP: AAL2 connection setup procedure In parallel with the RRC connection processing, NBAP: Radio link setup procedure and ALCAP: AAL2 connection setup procedure before receiving the RRC connection completion message from the UE Therefore, the UE can transmit an RRC connection completion message to the DCH, and the time taken to complete the connection can be shortened.

図3に示すように、本発明の移動体通信システムでは、万が一、RNCがNBAP:無線リンク設定手順、またはALCAP:AAL2コネクション設定手順が未完了の場合に、または失敗した場合に、RRCコネクションの確立をFACH(トランスポートチャネル)で再確立することで救済している。   As shown in FIG. 3, in the mobile communication system of the present invention, in the unlikely event that the RNC has not completed the NBAP: radio link setting procedure or ALCAP: AAL2 connection setting procedure, or has failed, the RRC connection The establishment is relieved by re-establishing with FACH (transport channel).

上記のように、本発明の移動体通信システムでは、RRC接続設定メッセージを送信するまでに遅延が発生しないように、RNCがUEからRRC接続要求メッセージ(RRC Connection Request)を受信したら、NBAP:無線リンク設定メッセージ(NBAP:Radio Link Setup Request)をNodeBに送信すると同時に、RRC接続設定メッセージ(RRC Connection Setup)をUEに送信することで、より早くUEからRRC接続設定完了メッセージ(RRC Connection Setup Complete)を受信することが可能となる。よって、本発明の移動体通信システムでは、UEから発信してきた呼(回線交換呼及びパケット呼)に対して接続が完了するまでにかかる時間を短縮することが可能となる。   As described above, in the mobile communication system of the present invention, when the RNC receives an RRC connection request message (RRC Connection Request) from the UE so that there is no delay until the RRC connection setup message is transmitted, NBAP: By sending a link setup message (NBAP: Radio Link Setup Request) to the NodeB and at the same time sending an RRC connection setup message (RRC Connection Setup) to the UE, the RRC connection setup complete message (RRC Connection Setup Complete) from the UE earlier. Can be received. Therefore, in the mobile communication system of the present invention, it is possible to reduce the time required for completing the connection for calls (circuit-switched calls and packet calls) transmitted from the UE.

本発明は、上記のような構成及び動作とすることで、移動体端末から発信されてきた呼に対して接続が完了するまでにかかる時間を短縮することができるという効果が得られる。   By adopting the above-described configuration and operation, the present invention provides an effect that it is possible to shorten the time taken to complete the connection for a call that has been transmitted from a mobile terminal.

次に、本発明の実施例について図面を参照して説明する。図1は本発明の一実施例による移動体通信システムの構成を示すブロック図である。図1において、本発明の一実施例による移動通信システムは、移動体端末[以下、UE(User Equipment)とする]1と、基地局(NodeB)2と、基地局2を制御する無線ネットワーク制御装置[以下、RNC(Radio Network Controller)とする]3と、図示せぬ移動交換網の交換動作を行う移動交換局[以下、CN(Core Network)とする]4とから構成されている。尚、図1において、11及び12はセル(Cell)を示している。   Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a mobile communication system according to an embodiment of the present invention. In FIG. 1, a mobile communication system according to an embodiment of the present invention includes a mobile terminal [hereinafter referred to as UE (User Equipment)] 1, a base station (NodeB) 2, and a radio network control for controlling the base station 2. An apparatus [hereinafter referred to as an RNC (Radio Network Controller)] 3 and a mobile switching center (hereinafter referred to as a CN (Core Network)) 4 that performs a switching operation of a mobile switching network (not shown). In FIG. 1, reference numerals 11 and 12 denote cells.

また、図示していないが、本発明の一実施例による移動体通信システムにおいて、UE1はRNC3に対してRRC(Radio Resource Control:無線リソース制御)メッセージを送受信する機能を持っている。基地局2はRNC3に対してNBAP(Node B Application Part)メッセージ及びALCAP(Access Link Control Application Part)メッセージを送受信する機能を持っている。RNC3はUE1及び基地局2に対してRRCメッセージ、NBAPメッセージ、及びALCAPメッセージを送受信する機能を持っている。   Although not shown, in the mobile communication system according to an embodiment of the present invention, the UE 1 has a function of transmitting / receiving an RRC (Radio Resource Control) message to the RNC 3. The base station 2 has a function of transmitting / receiving an NBAP (Node B Application Part) message and an ALCAP (Access Link Control Part) message to the RNC 3. The RNC 3 has a function of transmitting / receiving an RRC message, an NBAP message, and an ALCAP message to the UE 1 and the base station 2.

図2は本発明の一実施例による移動体通信システムにおけるRRC接続設定手順を示すシーケンスチャートであり、図3は本発明の一実施例による移動体通信システムにおけるRRC接続設定に失敗した時の手順を示すシーケンスチャートである。これら図1〜図3を参照して本発明の一実施例による移動体通信システムにおけるRRC接続設定手順について説明する。   FIG. 2 is a sequence chart showing an RRC connection setup procedure in a mobile communication system according to an embodiment of the present invention, and FIG. 3 is a procedure when RRC connection setup fails in a mobile communication system according to an embodiment of the present invention. It is a sequence chart which shows. The RRC connection setup procedure in the mobile communication system according to an embodiment of the present invention will be described with reference to FIGS.

まず、UE1は回線交換呼またはパケット呼を確立するために、RRCコネクションを確立する必要があるため、RNC3にRRC接続要求メッセージ(RRC Connection Request)[CCCH(Common Control Channel:共通制御チャネル)(論理チャネル),RACH(Random Access Channel:ランダムアクセスチャネル)(トランスポートチャネル),PRACH(Physical Random Access Channel:ランダムアクセス物理チャネル)(物理チャネル)]を送信する(図2のa1)。   First, since UE1 needs to establish an RRC connection in order to establish a circuit-switched call or a packet call, an RRC connection request message (RRC Connection Request) [CCCH (Common Control Channel) (logical control channel) (logical Channel), RACH (Random Access Channel) (transport channel), and PRACH (Physical Random Access Channel: physical channel)] (a1 in FIG. 2).

RNC3はRRC接続要求メッセージ(RRC Connection Request)を受信すると、NBAP:無線リンク設定メッセージ(NBAP:Radio Link Setup Request)の送信(図2のa2)と同時に、UE1にRRC接続設定メッセージ(RRC Connection Setup)[CCCH,FACH(Forward Access Channel:下りアクセスチャネル)(トランスポートチャネル)、S−CCPCH(Secondary Common Control Physical Channel:2次共通制御物理チャネル)(物理チャネル)]を送信する(図2のa3)。   When the RNC 3 receives the RRC connection request message (RRC Connection Request), the RRC connection setup message (RRC Connection Setup) is transmitted to the UE 1 simultaneously with the transmission of the NBAP: Radio Link Setup Message (NBAP: Radio Link Setup Request) (a2 in FIG. 2). ) [CCCH, FACH (Forward Access Channel: downlink access channel) (transport channel), S-CCPCH (Secondary Common Control Physical Channel) (physical channel)] (a3 in FIG. 2) ).

続けて、RNC3はALCAP:AAL2[ATM(Asynchronous Transfer Mode) Adaptation Layer type 2]コネクション設定メッセージ(ALCAP:Establish Request)を送信する(図2のa5)。   Subsequently, the RNC 3 transmits an ALCAP: AAL2 [ATM (Asynchronous Transfer Mode) Adaptation Layer type 2] connection setting message (ALCAP: Establish Request) (a5 in FIG. 2).

基地局2はNBAP:無線リンク設定メッセージを受信すると、無線リソースを割り当て、RNC3に無線リンク設定応答(NBAP:Radio Link Setup Response)を送信する(図2のa4)。また、基地局2はALCAP:AAL2コネクション設定メッセージを受信すると、AAL2コネクションを確立し、RNC3にALCAP:AAL2コネクション設定応答メッセージ(ALCAP:Establish Confirm)を送信する(図2のa6)。その後、基地局2は、無線リンクの同期完了を確認し、RNC3に無線リンクリストア指示メッセージ(NBAP:Radio Link Restore Indication)を送信する(図2のa7)。   Upon receiving the NBAP: radio link setup message, the base station 2 allocates radio resources and transmits a radio link setup response (NBAP: Radio Link Setup Response) to the RNC 3 (a4 in FIG. 2). When the base station 2 receives the ALCAP: ALAL2 connection setting message, the base station 2 establishes an AAL2 connection and transmits an ALCAP: ALAL2 connection setting response message (ALCAP: Establish Confirm) to the RNC 3 (a6 in FIG. 2). Thereafter, the base station 2 confirms the completion of the synchronization of the radio link and transmits a radio link restore instruction message (NBAP: Radio Link Restore Indication) to the RNC 3 (a7 in FIG. 2).

UE1はRRC接続設定メッセージを受信すると、設定したDCH(Dedicated Channel:個別チャネル)(トランスポートチャネル)上にRRC接続完了メッセージ(RRC Connection Setup Complete)[DCCH(Dedicated Control Channel:個別制御チャネル)(論理チャネル),DCH(トランスポートチャネル),DPDCH(Dedicated Physical Data Channel:個別物理データチャネル)(物理チャネル)]を送信する(図2のa8)。   Upon receiving the RRC connection setup message, the UE 1 receives an RRC connection completion message (RRC Connection Setup Complete) [DCCH (Dedicated Control Channel) (logical control channel) (logical control channel) on the set DCH (Dedicated Channel) (transport channel). Channel), DCH (transport channel), DPDCH (Dedicated Physical Data Channel) (physical channel)] (a8 in FIG. 2).

従来のRRCコネクション確立手順を示す図4において、RNC3はALCAP:AAL2コネクション設定応答メッセージ(ALCAP:Establish Confirm)の受信からRRC接続設定メッセージ(RRC Connection Setup)の送信までにALCAP:AAL2コネクション設定手順、及び内部のリソース割り当て手順のために時間Aが必要である。   In FIG. 4 showing a conventional RRC connection establishment procedure, the RNC 3 performs an ALCAP: ALAL2 connection setup procedure from the reception of the ALCAP: ALAL2 connection setup response message (ALCAP: Establish Confirm) to the transmission of the RRC connection setup message (RRC Connection Setup). And time A is required for the internal resource allocation procedure.

一方で、UE1は、RRC接続設定メッセージ(RRC Connection Setup)の受信から、RRC接続設定完了メッセージ(RRC Connection Setup Complete)の返信までに時間Bが必要である。   On the other hand, the UE 1 needs time B from the reception of the RRC connection setup message (RRC Connection Setup) to the reply of the RRC connection setup completion message (RRC Connection Setup Complete).

ここで、時間Aと時間Bとの関係は、必ず時間A<時間Bであるため、本発明によってALCAP:AAL2コネクション設定手順の前にRRC接続設定メッセージ(RRC Connection Setup)を送信するように変更することで、RNC3とUE1との両方で手順上は並行となる。結果として、RNC3はRRC接続設定(RRC Connection Setup)手順で少なくとも時間Aの短縮効果が期待できる。   Here, since the relationship between the time A and the time B is always time A <time B, according to the present invention, the RRC connection setup message (RRC Connection Setup) is changed to be transmitted before the ALCAP: AAL2 connection setup procedure. As a result, both the RNC 3 and the UE 1 are parallel in procedure. As a result, the RNC 3 can expect at least a time A shortening effect in the RRC connection setup procedure.

また、本実施例では、図3に示すように、万が一、RNC3がNBAP:無線リンク設定手順、またはALCAP:AAL2コネクション設定手順が未完了の場合、または失敗した場合に(図3のb1〜b5)、RRCコネクションの確立をFACH(トランスポートチャネル)で再確立することで救済している(図3のb6,b7)。   Further, in this embodiment, as shown in FIG. 3, when the RNC 3 has not completed or failed the NBAP: radio link setting procedure or the ALCAP: AAL2 connection setting procedure (b1 to b5 in FIG. 3). ), The establishment of the RRC connection is relieved by re-establishing with the FACH (transport channel) (b6 and b7 in FIG. 3).

本発明の一実施例による移動体通信システムの構成を示すブロック図である。It is a block diagram which shows the structure of the mobile communication system by one Example of this invention. 本発明の一実施例による移動体通信システムにおけるRRC接続設定手順を示すシーケンスチャートである。It is a sequence chart which shows the RRC connection setting procedure in the mobile communication system by one Example of this invention. 本発明の一実施例による移動体通信システムにおけるRRC接続設定に失敗した時の手順を示すシーケンスチャートである。It is a sequence chart which shows a procedure when the RRC connection setup in the mobile communication system by one Example of this invention fails. 従来例による移動体通信システムにおけるRRC接続設定手順を示すシーケンスチャートである。It is a sequence chart which shows the RRC connection setting procedure in the mobile communication system by a prior art example.

符号の説明Explanation of symbols

1 移動体端末(UE)
2 基地局(NodeB)
3 無線ネットワーク制御装置(RNC)
4 移動交換局(CN)
11,12 セル(Cell)
1 Mobile terminal (UE)
2 Base station (NodeB)
3 Radio network controller (RNC)
4 Mobile switching center (CN)
11,12 cells (Cell)

Claims (6)

少なくとも移動体端末と基地局と無線ネットワーク制御装置とから構成され、前記移動体端末が発呼する際に、移動管理と呼制御とを転送するためにシグナリングコネクションの無線リソース制御コネクションを確立する移動体通信システムであって、
前記無線ネットワーク制御装置は、前記基地局に対するNBAP(Node B Application Part):無線リンク設定手順の開始と同時に、前記無線リソース制御コネクションの接続要求を行った前記移動体端末に前記無線リソース制御コネクションの接続設定メッセージを送信し、前記NBAP:無線リンク設定手順及びALCAP(Access Link Control Application Part):AAL2[ATM(Asynchronous Transfer Mode) Adaptation Layer type 2]コネクション設定手順を前記無線リソース制御コネクションの接続要求を行った前記移動体端末側の処理と並行して実行する手段を有することを特徴とする移動体通信システム。
A mobile terminal comprising at least a mobile terminal, a base station, and a radio network controller, and establishing a radio resource control connection of a signaling connection to transfer mobility management and call control when the mobile terminal makes a call A body communication system,
The radio network controller is configured to transmit the radio resource control connection to the mobile terminal that has made a connection request for the radio resource control connection simultaneously with the start of a radio link setting procedure, NBAP (Node B Application Part) for the base station. A connection setup message is transmitted, and the NBAP: radio link setup procedure and ALCAP (Access Link Application Part): AAL2 [ATM (Asynchronous Transfer Mode) connection request procedure for connection setup of the radio layer type connection connection request. mobile communication system, characterized in that it comprises means for executing in parallel with the mobile terminal side of the processing performed.
前記無線ネットワーク制御装置は、前記NBAP:無線リンク設定手順または前記ALCAP:AAL2コネクション設定手順の未完了または失敗時に前記無線リソース制御コネクションの確立をトランスポートチャネルで再確立することを特徴とする請求項1記載の移動体通信システム。   The radio network controller re-establishes the establishment of the radio resource control connection through a transport channel when the NBAP: radio link setup procedure or the ALCAP: AAL2 connection setup procedure is not completed or failed. The mobile communication system according to 1. 移動体端末が発呼する際に、移動管理と呼制御とを転送するためにシグナリングコネクションの無線リソース制御コネクションを確立する移動体通信システムを、少なくとも前記移動体端末と基地局とともに構成する無線ネットワーク制御装置であって、
前記基地局に対するNBAP(Node B Application Part):無線リンク設定手順の開始と同時に、前記無線リソース制御コネクションの接続要求を行った前記移動体端末に前記無線リソース制御コネクションの接続設定メッセージを送信し、前記NBAP:無線リンク設定手順及びALCAP(Access Link Control Application Part):AAL2[ATM(Asynchronous Transfer Mode) Adaptation Layer type 2]コネクション設定手順を前記無線リソース制御コネクションの接続要求を行った前記移動体端末側の処理と並行して実行する手段を有することを特徴とする無線ネットワーク制御装置。
A radio network comprising, together with at least the mobile terminal and a base station, a mobile communication system for establishing a radio resource control connection of a signaling connection to transfer mobility management and call control when a mobile terminal makes a call A control device,
NBAP (Node B Application Part) for the base station: simultaneously with the start of a radio link setting procedure, a connection setting message for the radio resource control connection is transmitted to the mobile terminal that has made a connection request for the radio resource control connection; The NBAP: radio link setting procedure and ALCAP (Access Link Application Part): AAL2 [ATM (Asynchronous Transfer Mode) Adaptation Layer type 2] The connection request of the radio resource control connection is made by the connection request of the radio resource control connection A wireless network control device comprising means for executing in parallel with the above processing.
前記NBAP:無線リンク設定手順または前記ALCAP:AAL2コネクション設定手順の未完了または失敗時に前記無線リソース制御コネクションの確立をトランスポートチャネルで再確立することを特徴とする請求項3記載の無線ネットワーク制御装置。   4. The radio network controller according to claim 3, wherein the radio resource control connection is reestablished by a transport channel when the NBAP: radio link setup procedure or the ALCAP: AAL2 connection setup procedure is not completed or failed. . 少なくとも移動体端末と基地局と無線ネットワーク制御装置とから構成され、前記移動体端末が発呼する際に、移動管理と呼制御とを転送するためにシグナリングコネクションの無線リソース制御コネクションを確立する移動体通信システムに用いる呼接続時間短縮方法であって、
前記無線ネットワーク制御装置が、前記基地局に対するNBAP(Node B Application Part):無線リンク設定手順の開始と同時に、前記無線リソース制御コネクションの接続要求を行った前記移動体端末に前記無線リソース制御コネクションの接続設定メッセージを送信し、前記NBAP:無線リンク設定手順及びALCAP(Access Link Control Application Part):AAL2[ATM(Asynchronous Transfer Mode) Adaptation Layer type 2]コネクション設定手順を前記無線リソース制御コネクションの接続要求を行った前記移動体端末側の処理と並行して行う処理を実行することを特徴とする呼接続時間短縮方法。
A mobile terminal comprising at least a mobile terminal, a base station, and a radio network controller, and establishing a radio resource control connection of a signaling connection to transfer mobility management and call control when the mobile terminal makes a call A call connection time shortening method used in a body communication system,
The radio network control device sends an NBAP (Node B Application Part) for the base station to the mobile terminal that has made a connection request for the radio resource control connection simultaneously with the start of the radio link setting procedure. A connection setup message is transmitted, and the NBAP: radio link setup procedure and ALCAP (Access Link Application Part): AAL2 [ATM (Asynchronous Transfer Mode) connection request procedure for connection setup of the radio layer type connection connection request. A call connection time shortening method, comprising: performing a process performed in parallel with the process performed on the mobile terminal side.
前記無線ネットワーク制御装置が、前記NBAP:無線リンク設定手順または前記ALCAP:AAL2コネクション設定手順の未完了または失敗時に前記無線リソース制御コネクションの確立をトランスポートチャネルで再確立することを特徴とする請求項5記載の呼接続時間短縮方法。   The radio network controller re-establishes the establishment of the radio resource control connection in a transport channel when the NBAP: radio link setup procedure or the ALCAP: AAL2 connection setup procedure is incomplete or failed. 5. The call connection time shortening method according to 5.
JP2005359681A 2005-12-14 2005-12-14 Mobile communication system, radio network controller, and call connection time shortening method Expired - Fee Related JP4725312B2 (en)

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