KR20070047518A - Apparatus and method for fast rrc connection in mobile communication system - Google Patents

Abstract

The present invention relates to a fast RRC connection apparatus and method in a mobile communication system, and a method for fast RRC (Radio Resource Control) connection in a mobile communication system, wherein a process of receiving a request for the RRC connection from a mobile terminal by a wireless network controller And, after the RRC connection request, the radio network controller simultaneously performs an RRC connection setup request process to the mobile communication terminal, a radio link setup and an access link control application part (ALCAP) connection and synchronization to a base station, and After the radio link setup and ALCAP (Access Link Control Application Part) connection and synchronization, including the step of receiving notification of the completion of the RRC setup from the mobile communication terminal by setting the RRC connection setup procedure in parallel, the WCDMA mobile communication system of the There is an advantage to speed up the service connection.

Mobile communication terminal, CDMA, WCDMA, RRC (Radio Resource Control).

Description

Device and method for fast RAL connection in mobile communication system {APPARATUS AND METHOD FOR FAST RRC CONNECTION IN MOBILE COMMUNICATION SYSTEM}

1 is a flowchart illustrating a message flow of a network element for establishing an existing RRC connection;

2 is a diagram illustrating a network configuration according to an embodiment of the present invention;

3 is a flowchart illustrating a message flow in a mobile communication terminal for fast RRC connection establishment according to an embodiment of the present invention;

4 is a flowchart illustrating a message flow at a base station for fast RRC connection establishment according to the present invention;

5 is a flowchart illustrating a message flow in a wireless network controller for fast RRC connection establishment according to an embodiment of the present invention;

6 is a flowchart illustrating a message flow of a network element for fast RRC connection establishment according to an embodiment of the present invention.

The present invention relates to a fast RRC connection apparatus and method in a mobile communication system.

The use of mobile communication terminals is increasing rapidly due to the convenience of portable. With the rapid increase in the use of mobile communication terminals, service providers (mobile communication terminal manufacturers) are competitively developing mobile communication terminals having more convenient functions to secure many users.

E.g. The mobile communication terminal includes a phone book, a game, a short message, an internet, an e-mail, a morning call, a file viewer, a file transfer. , 3D UI (User Interface), scheduler (scheduler) function, etc. are provided.

On the other hand, in addition to the Code Division Multiple Access (CDMA) 2000-based service that has been widely distributed as described above, a Wide Code Division Multiple Access (WCDMA) -based service is also in preparation for providing a commercial service.

In order to provide a service using the WCDMA, a two-step procedure must be performed by separating a wireless access point setting step for transmitting control information from a wireless access point setting step for transmitting a user service.

1 shows a message flow of a network element for establishing an existing RRC connection. The RRC (Radio Resource Control) connection is performed at the beginning of the connection for the exchange of control information between the mobile communication terminal and the UTRAN (UMTS Terresterial Radio Access Network).

Referring to FIG. 1, a user equipment (UE) 110 represents a mobile communication terminal. NodeB 120 represents a base station, hereinafter referred to as base station. Radio Network Controller (RNC) 130 represents a control station, hereinafter referred to as a radio network controller. CN (Core Network) 140 represents a core network and hereinafter referred to as a core network.

First, the mobile communication terminal 110 transmits an RRC connection request message to the radio network controller 130 in step 150.

The RRC connection request message is a message used by the RRC layer 112 of the mobile communication terminal 110 and the RRC layer 132 of the radio network controller 130 to establish an RRC connection. Is a message sent by). The RRC connection request message is a message transmitted through a reverse access channel (RACH) and a common control channel (CCCH).

Upon receiving the RRC connection request message, the wireless network controller 130 transmits a radio link setup request message to the base station 120 in step 152.

The radio link setting request message is a message for the radio network controller 130 to set up a radio resource of the mobile communication terminal 130 and request the base station 120 to allocate it.

Upon receiving the radio link setup request message, the base station 120 transmits a radio link setup response message in response to step 154.

The radio link establishment request message and the radio link establishment response message are messages used by the Node B Application Protocol (NBAP) 124 of the base station 120 and the NBAP 134 of the radio network controller 130, and the NBAP. 124 and 134 are responsible for radio resource management between the base station 120 and the radio network controller 130, that is, setting, resetting, and releasing a radio link.

In step 156, the base station 120 and the wireless network controller 130 perform a data transmission setup process between the base station 120 and the wireless network controller 130 using an access link control application part (ALCAP). Perform.

The ALCAP represents a transmission signal protocol related to the establishment and release of a transport layer in a network, and performs a data transmission setup process.

The Iub in step 156 represents an interface between the base station 120 and the radio network controller 130.

Subsequently, the base station 120 and the wireless network controller 130 perform forward link synchronization 158 and reverse link synchronization 160 using dedicated control protocol (DCH-FP) 126 and 136 in steps 158 and 160. Exchange messages for and synchronize.

The DCH-FPs 126 and 136 represent protocols in which the forward link synchronization and reverse link synchronization messages are used.

In step 162, the radio network controller 130 transmits an RRC connection setup message to the mobile terminal 110. The RRC connection setup message is determined by the wireless network controller 130 to determine the quality of service (QoS) level for the service required by the mobile communication terminal 110, and then the mobile communication terminal 110 according to the expected transmission capacity. Message, which is used to transmit basic information, transmission channel information, and physical channel information to the mobile communication terminal 110, and is transmitted using a common control channel (CCCH) and a forward access channel (FACH).

In step 163, the base station 120 transmits a radio link restore indication message to the radio network controller 130. The radio link return notification message is a message using Dedicated CHannel-Frame Protocol (DCH-FP) 126, 136. The radio network controller provides radio resource configuration information to be used by the mobile station 110 by the base station 120. This message is sent to 130.

After receiving the RRC connection setup message, the mobile communication terminal 110 transmits an RRC connection setup complete message to the radio network controller 130 in step 164.

The RRC connection setup complete message is set after the mobile communication terminal 110 successfully receives the RRC connection setup message, and sets a lower layer according to the setup of the message. This message is sent to).

In step 166, the mobile communication terminal 110 transmits an initial direct transfer message to the wireless network controller 130.

The initial direct transmission message is a message used to establish a signaling connection for delivering a Non Access Stratum (NAS) message, which is a message of a higher layer.

Upon receiving the initial direct transmission message, the wireless network controller 130 transmits the initial UE message to the core network using the RANAP (138, 148) in step 168. Transmit to 140.

The RANAPs 138 and 148 represent the signaling protocols required for radio resource management between the UTRAN and the core network 140.

In FIG. 1, the conventional technology has a problem in that a connection time is too much used during call setup.

That is, when the RRC connection request message is transmitted, the wireless network controller receiving the message performs radio link setting, ALCAP data transmission setting, forward link, and reverse link synchronization, and then sends an RRC connection setting message to the mobile communication terminal. Since a sequential structure of transmitting is used, a delay time for completing the RRC connection is large.

Accordingly, an object of the present invention is to provide an apparatus and method for fast RRC connection in a mobile communication system.

The apparatus of the present invention for achieving the above object is a device for fast RRC (Radio Resource Control) connection in a mobile communication system, after receiving the RRC connection request message, the radio set to the RRC connection to the mobile communication terminal and the base station A wireless network controller that simultaneously performs link setup and ALCAP (Access Link Control Application Part) connection and synchronization process, and transmits an RRC connection setup complete message and an initial direct transmission message to the wireless network controller, and then a response message at the second layer. If there is no reception, characterized in that it comprises a mobile communication terminal for retransmitting the message.

The present invention for achieving the above object is a method for fast RRC (Radio Resource Control) connection in a mobile communication system, the process of receiving a request for the RRC connection from the mobile network controller, and the RRC connection request Thereafter, the radio network controller requests the RRC connection establishment request to the mobile communication terminal, performs a radio link establishment and an access link control application part (ALCAP) connection and synchronization to a base station, and performs the radio link establishment and ALCAP ( Access Link Control Application Part) after the connection and synchronization, characterized in that it comprises the step of receiving notification of the completion of the RRC configuration from the mobile communication terminal.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of related well-known technologies or configurations will be omitted when it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention.

Hereinafter, the present invention will be described a fast RRC connection apparatus and method in a mobile communication system.

2 illustrates a network configuration according to an embodiment of the present invention. The network component using WCDMA is similar to that of a network using CDMA, and the difference between the WCDMA network component and the existing WCDMA network component in the present invention is different in the manner of implementing the WCDMA.

Referring to FIG. 2, the base station 220 is managed by the radio network controller 230 and receives information sent from the physical layer of the mobile communication terminal 210, which is a transmitting side as an uplink, and receives data as a downlink. It serves as a connection point of the UTRAN 260 to the mobile communication terminal 210 that transmits to the mobile communication terminal 210 that is the receiving side. The radio network controller 230 is responsible for the allocation and management of radio resources.

The services provided to the mobile communication terminal 220 are largely divided into circuit switched service and packet switched service. For example, a general voice telephone service belongs to a circuit switched service, and a web browsing service through an internet connection is classified as a packet switched service.

In the case of supporting the circuit switched service, the wireless network controller 230 is connected to the mobile switching center (MSC) 240 of the core network 270, and the MSC 240 is connected to the GMSC 245 for communication. . In this case, the Gateway Mobile Switching Center (GMSC) 245 is in charge of managing connection with other networks.

The packet switching service is provided by a Serving GPRS Support Node (SGSN) 250 and a Gateway GPRS Support Node (GGSN) 255 of the core network 270. The SGSN 250 supports packet communication directed to the radio network controller 230, and the GGSN 255 manages the connection to another packet switched network such as the Internet network.

An interface capable of transmitting and receiving data for communication with each other exists between various network components. An interface between the wireless network controller 230 and the core network 270 is defined as an lu interface. In addition, when the Iu interface is connected to the packet switched area, it is called Iu-PS, and when it is connected to the circuit switched area, it is defined as Iu-CS.

3 illustrates a message flow in a mobile communication terminal for fast RRC connection establishment according to an embodiment of the present invention.

Referring to FIG. 3, the mobile communication terminal 210 transmits an RRC connection request message to the radio network controller 230 in step 310.

In step 320, when the RRC connection establishment message is received, the mobile communication terminal 210 transmits the RRC connection establishment completion message to the radio network controller 230 in step 330.

The RRC connection setup complete message is set after the mobile communication terminal 210 successfully receives the RRC connection setup message, sets a lower layer according to the setup of the message, and then outputs the result to the wireless network controller 230. This message is sent to).

In step 340, the mobile communication terminal 210 transmits an initial direct transfer message to the wireless network controller 230.

In step 350, if there is no reception of the ACK message in the second layer, the mobile communication terminal 210 retransmits the message and terminates the algorithm according to the present invention.

4 illustrates a message flow at a base station for fast RRC connection establishment according to the present invention.

Referring to FIG. 4, when the base station 220 receives the radio link setup request message transmitted from the radio network controller 230 in step 410, the base station 220 proceeds to step 420 in response to the radio link setup response (Radio Link Setup). Response) Send a message.

In step 430, the base station 220 and the wireless network controller 230 perform a data transmission setting process between the base station 220 and the wireless network controller 230 using an access link control application part (ALCAP). Perform. The ALCAP represents a transmission signal protocol related to the establishment and release of a transport layer in a network, and performs a data transmission setup process.

Thereafter, the base station 220 receives a downlink synchronization message in step 440 and transmits an uplink synchronization message to the radio network controller 230 in step 450.

The synchronization process performed in the forward link synchronization message and the reverse link synchronization message exchange is performed using Dedicated CHannel-Frame Protocol (DCH-FP).

In step 460, the base station 120 transmits a radio link restore indication message to the radio network controller 130. The radio link recovery notification message is a message for transmitting the radio resource setting information to be used by the mobile station 210 by the base station 220 to the radio network controller 230 as a message using the DCH-FP.

5 illustrates a message flow in a radio network controller for fast RRC connection establishment according to an embodiment of the present invention.

Referring to FIG. 5, when the RRC connection request message is received in step 510, the wireless network controller 230 proceeds to step 515 and transmits a radio link setup request message to the base station 220. do.

In step 525, the radio network controller 230 transmits an RRC connection setup message to the mobile communication terminal 210. The RRC connection setup message is obtained after the wireless network controller 230 grasps a quality of service (QoS) level for a service required by the mobile communication terminal 210, and then the mobile communication terminal 210 according to the expected transmission capacity. Message, which is used to transmit basic information, transmission channel information, and physical channel information to the mobile communication terminal 210, and is transmitted using a common control channel (CCCH) and a forward access channel (FACH).

After the transmission of the messages in steps 515 and 525, the mobile communication terminal 210 and the base station 220 may simultaneously perform an RRC connection process.

In step 530, the radio network controller 230 receives a radio link setup response message in response to the radio link setup message transmitted in step 515.

In step 535, the radio network controller 230 performs a data transmission setup process using the base station 220 and the ALCAP. The ALCAP represents a transmission signal protocol related to the establishment and release of a transmission layer in a network, and performs a data transmission setting process.

Thereafter, the wireless network controller 230 and the base station 220 exchange messages and perform synchronization for the forward link synchronization 540 and the reverse link synchronization 545 using the DCH-FP in steps 540 and 545. . The DCH-FP represents a protocol in which the forward link synchronization and reverse link synchronization messages are used.

In step 550, the radio network controller 230 receives a radio link restore indication message from the base station 220.

Thereafter, the wireless network controller 230 checks whether the RRC connection establishment complete message transmitted by the mobile communication terminal 210 is received in step 555.

If the RRC connection setup complete message is received in step 555, the process proceeds to step 560 to receive and process an initial direct transfer message transmitted by the mobile communication terminal 210.

If the RRC connection establishment complete message is not received in step 555 and an initial direct transfer message transmitted by the mobile communication terminal 210 in step 575 is received, the wireless network controller 230 is received. In step 570, temporarily stores the initial direct transmission message received first.

In step 575, the RRC connection establishment completion message is received. In step 580, the initial direct transmission message is temporarily processed, and the algorithm according to the present invention is terminated.

6 illustrates a message flow of a network element for fast RRC connection establishment according to an embodiment of the present invention.

Referring to FIG. 6, the mobile communication terminal 610 transmits an RRC connection request message to the radio network controller 630 in step 650.

In step 652, the wireless network controller 630 receiving the RRC connection request message transmits a radio link setup request message to the base station 620.

In step 654, the radio network controller 630 transmits an RRC connection setup message to the mobile communication terminal 610.

In response to receiving the radio link setup request message, the base station 620 transmits a radio link setup response message as a response in step 656.

In step 658, the base station 620 and the wireless network controller 630 perform a data transmission setup process between the base station 620 and the wireless network controller 630 using an access link control application part (ALCAP). Perform.

Thereafter, the base station 620 and the wireless network controller 630 exchange messages for the forward link synchronization 660 and the reverse link synchronization 662 by using the DCH-FP in steps 660 and 662 and perform synchronization. . .

In step 664, the base station 620 transmits a radio link return notification message to the radio network controller 630.

In step 668, the mobile communication terminal 610 receiving the RRC connection setup message transmits an RRC connection setup complete message to the wireless network controller 630.

In step 670, the mobile communication terminal 610 transmits an initial direct transfer message to the wireless network controller 630.

The operation between the base station 620 and the wireless network controller 630 after the step 652 and the operation between the mobile communication terminal 610 and the wireless network controller 630 after the step 654 are simultaneously performed in parallel with each other. Proceed.

Since the RRC connection setup message is transmitted to the mobile communication terminal 610 through a wireless section, it takes a lot of time, and during this time, the wireless network controller 630 performs radio link setup / ALCAP data transmission setup / synchronization. Create a dedicated data path where possible.

When the wireless network controller 630 receives the RRC connection setup complete message transmitted by the mobile communication terminal 610 while performing radio link setup / ALCAP data transmission setup / synchronization, the RRC connection setup complete message is processed. After that, it should be possible to perform the setting process.

When the ALCAP data transmission setting is not completed, the mobile communication terminal 610 retransmits and when it is completed, the wireless network controller 630 may receive the RRC connection setting completion message.

In addition, when receiving the initial direct transmission message before the RRC connection establishment complete message, the radio network controller 630 temporarily stores the RRC connection establishment completion so as to be processed after receiving the RRC connection establishment complete message. After receiving and processing the message, the initial direct transmission message is processed.

 Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention has an advantage in that the service connection speed of the WCDMA mobile communication system can be increased by setting the RRC connection setup procedure in parallel.

Claims (7)

In a device for fast RRC (Radio Resource Control) connection in a mobile communication system, After receiving the RRC connection request message, the wireless network controller to perform the RRC connection establishment process to the mobile communication terminal, the radio link to the base station and the connection and synchronization process of ALCAP (Access Link Control Application Part) at the same time, and And transmitting a RRC connection establishment complete message and an initial direct transmission message to the radio network controller, and when there is no response message received in the second layer, retransmitting the corresponding message. The method of claim 1, When the wireless network controller receives the initial direct transmission message from the mobile communication terminal before the RRC connection establishment completion message, the wireless network controller temporarily stores the initial direct transmission message, receives and processes the RRC connection establishment completion message, and then temporarily And process the initial direct message stored. In a method for fast RRC (Radio Resource Control) connection in a mobile communication system, Receiving a request for the RRC connection from a mobile communication terminal by a wireless network controller; After the RRC connection request, by the radio network controller performing an RRC connection establishment request process to the mobile communication terminal, a radio link establishment and an access link control application part (ALCAP) connection and synchronization to a base station; And receiving a notification of completion of RRC setting from the mobile communication terminal after establishing the radio link and connecting and synchronizing an access link control application part (ALCAP). In the method for fast RRC (Radio Resource Control) connection in a wireless network controller, Receiving an RRC connection request message sent by the mobile communication terminal; Transmitting, after receiving the RRC connection request message, a radio link establishment request message to a base station and an RRC connection establishment message to the mobile communication terminal; After the transmission, the radio network controller performing the radio link establishment and the ALCAP (Access Link Control Application Part) connection and synchronization with the base station; After the radio link establishment and ALCAP connection and synchronization are performed, the radio network controller receiving and processing an RRC connection establishment complete message from the mobile communication terminal; And after receiving the RRC connection setup complete message, receiving and processing an initial direct transmission message transmitted by the mobile communication terminal. The method of claim 4, wherein During the ALCAP connection and synchronization, if the wireless network controller receives the RRC connection setup complete message from the mobile communication terminal, receiving and processing the RRC connection setup complete message retransmitted by the mobile communication terminal It further comprises a method. The method of claim 4, wherein When the radio network controller first receives an initial direct transmission message from the mobile communication terminal after setting up the radio link and performing ALCAP connection and synchronization, temporarily storing the initial direct transmission message received first; Receiving and processing the RRC connection setup complete message after temporarily storing the initial direct transmission message; And after processing the RRC connection setup complete message, processing the initial direct transmission message stored temporarily. In the method for fast RRC (Radio Resource Control) connection in a mobile communication terminal, Transmitting, by the mobile communication terminal, an RRC connection establishment complete message and an initial direct transmission message to a wireless network controller; After the transmission, if there is no response message received in the second layer, retransmitting the corresponding message.

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