KR20060079893A - The method for reducing the call setup time by changing the call setup procedures in wcdma system - Google Patents

Abstract

The present invention relates to a call processing method for shortening a call setup time in a WCDMA mobile communication system. The present invention relates to an RRC connection request message for requesting an RRC connection and an initial signaling request for an Iu signaling connection. Direct transmission message is sent to the wireless network controller at the same time, and the downlink direct transmission for transmitting the RRC connection configuration message and the direct transmission message downlink including the configuration information necessary for the service requested by the wireless network controller from the user terminal. By simultaneously sending a message to the user terminal, the call setup time can be shortened, thereby reducing the waiting time of the user and providing a quick communication service, and improving the processing speed of the system to increase the efficiency of network operation. have

WCDMA

Description

The method for reducing the call setup time by changing the call setup procedures in WCDMA system             

1 is an overall configuration diagram of a general WCDMA system;

2 is a protocol layer diagram for an interface between a user terminal and a wireless access network;

3 is a conceptual diagram illustrating a communication layer (STRATUM) between components of a WCDMA system;

4 is a flowchart illustrating a call setup procedure according to the prior art;

5 is a flowchart illustrating a call setup procedure according to the present invention.

The present invention relates to a method for shortening a call setup time in a mobile communication system, and more particularly, by changing a message processing procedure for transmitting and receiving a call between components in a WCDMA mobile communication system, which is a third generation mobile communication system. The present invention relates to a method for reducing call setup time.

With the development of mobile communication technology, data to be transmitted in wireless communication network is gradually increasing in volume, and there is a need to transmit large data at high speed without error. The WCDMA system developed according to these requirements is a third generation communication system for improving data transmission speed in a European-oriented mobile communication system. The third generation system, represented by WCDMA system, was developed for the purpose of multimedia data transmission, and it is different from many existing systems such as high-definition image service and fast data rate. They are developing 3GPP (3rd Generation Project Group) to develop technical specifications.

However, the current WCDMA system is still a low technical completion in many aspects, and various technical problems to be improved are pointed out, and in particular, there is a problem that call setup time is relatively long in new call processing.

An object of the present invention is to provide a call processing method for reducing a call setup time by changing the order of messages exchanged between a terminal and a system during call setup.

In order to achieve the above object, the present invention provides a user terminal for receiving a mobile communication service from a WCDMA system, a radio network controller and a subscriber's call for controlling radio resources in the RNS and transferring data transmitted through the UTRAN to an appropriate node. A call processing method for shortening call setup time in a WCDMA system including a core network responsible for processing and mobility control, the RRC connection request message and signaling connection request for requesting an RRC connection from the user terminal; A first step in which the wireless network controller simultaneously receives an initial direct transmission message, wherein the wireless network controller includes setting information necessary for a service requested from the user terminal in response to the RRC connection request message; A second step of transmitting a message to the user terminal; A third step in which the wireless network controller transmits an initial user terminal message for signaling connection to the core network by the initial direct transmission message; the core network receives the initial user terminal message and then responds to the user terminal in response. A fourth step of transmitting a direct transmission message, which is a message between the core networks, to the wireless network controller; when the wireless network controller receives the direct transmission message, a downlink for transmitting the direct transmission message to the user terminal in a downlink And a fifth step of transmitting a link direct transmission message.

In addition, a call processing method in a WCDMA system according to the present invention includes the first step in which the radio network controller receives an RRC connection request message for an RRC connection from the user terminal; A second step of receiving an initial direct transmission message requesting a request; a third step of the wireless network controller transmitting an initial user terminal message for signaling connection to the core network by the initial direct transmission message; A fourth step of receiving a terminal message and transmitting a direct transmission message, which is a message between the user terminal and the core network, to the wireless network controller in response thereto; for the service requested from the user terminal. RRC connection setup message including necessary setup information And a fifth step of simultaneously transmitting a downlink direct transmission message for transmitting the direct transmission message in the downlink to the user terminal at step 4.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall configuration diagram of a general WCDMA system.

As shown, the WCDMA system includes a user equipment (UE) 10, a UMTS Terrestrial Radio Access Network (UTRAN) 20, and a core network CN. It consists of 30. In addition, the UTRAN 20 is composed of a plurality of Radio Network Subsystems (RNSs). The RNS controls radio resources in the RNS and transfers data transmitted through the UTRAN 20 to an appropriate node. Node that is hardware that is responsible for transmitting and receiving data through a radio network controller (hereinafter referred to as 'RNC') 25 and a radio interface (hereinafter 'Uu') between the UE 10 and the UTRAN 20. It consists of B26.                     

The CN 30 is a network that handles call processing, mobility control, and switching in a network, and manages network management nodes such as a mobile switching center (MSC), a GPRS gateway support node (GGSN), and a home location register (HLR). It is included. On the other hand, the interface between CN 30 and UTRAN 20 is called Iu.

2 is a protocol hierarchy diagram for the interface between the UE 10 and the UTRAN 20.

As shown, the protocol is L1, which is a physical layer responsible for data transmission between the two ends, MAC, which is responsible for mapping for data transmission between the logical layer and the transport layer, data partitioning, combination, and error for ensuring reliability between transmitters and receivers. RLC to perform correction, RRC (Radio Resource Control) for transmitting and controlling all parameters necessary for using radio resources between UE 10 and UTRAN 20 and location registration or call setup of UE 10 It consists of CC, CM for maintenance and release.

Here, the RRC layer is responsible for setting up and releasing a radio bearer between the UE 10 and the UTRAN 20, and defines various RRC procedures for exchanging setting information necessary for radio resource management. Thus, the UE 10 and the UTRAN are defined. In order to exchange control information between the 20, an RRC connection must be established at the beginning of the connection. Through this RRC connection procedure, a signaling radio bearer (SRB), which is responsible for the transmission of the RRC message, is determined.

3 is a conceptual diagram illustrating a communication layer (STRATUM) between components of a WCDMA system.

Non-Access Stratum (NAS) is a functional layer for exchanging traffic or control messages between the UE 10 and the CN 30, and transmits and receives control messages for radio control management. The procedure for establishing a passage between the 10 and the CN 30 is called a signaling connection. This signaling connection consists of the RRC connection between the UE 10 and the UTRAN 20 and the Iu signaling connection using the RANAP (Radio Access Network Access Protocol) which is a signaling protocol between the UTRAN 20 and the CN 30. . That is, when such a signaling connection is made, it is possible to send and receive messages directly between the UE 10 and the CN 30, and such a message is called a NAS message. A detailed description of the signaling connection procedure will be given later.

Meanwhile, an access layer (AS) is a set of functions and protocols for supporting a NAS through the UTRAN 20.

4 is a flowchart illustrating a call setup procedure according to the prior art.

When the UE 10 sends an RRC connection request message to the RNC 25 to establish an RRC connection (S10), the RNC 25 checks the QoS level for the required service and then relies on the expected transmission capacity. Accordingly, the RRC connection setup message including the terminal main information, physical channel information, and the like is transmitted to the UE 10 (S20). After successfully receiving the RRC connection establishment message, the UE 10 finishes the configuration according to the instruction, and transmits an RRC connection completion message indicating this to the RNC 25 (S30), thereby completing the RRC connection.

When the RRC connection is completed, the UE 10 sends an initial direct transfer message to the RNC 25 to establish a signaling connection for NAS message delivery (S40), and the RNC 25 sends a CN. In step S50, an initial UE message is transmitted in order to establish an Iu signaling connection. When the signaling connection is completed by this, the CN 30 transmits a direct transmission message, which is a NAS message between the UE 10 and the CN 30, to the RNC 25, and the RNC 25 does not read the downlink directly. The transmission message is transmitted to the UE (S70).

Thereafter, the CN 30 transmits a bearer allocation request message to the RNC 25 requesting to allocate a radio bearer to carry a message between the UE 10 and the RNC 25 (S80). The received RNC 25 transmits a bearer setup message including encryption related information, channel information, etc. to the UE 10 for setup of a radio bearer (S90). Accordingly, the UE 10 transmits a bearer setup completion message to the RNC 25 (S100), and the received RNC 25 transmits a response message to the bearer allocation request to the CN 30 (S110). Data communication between the 10 and the CN 30 is enabled (S120).

5 is a flowchart illustrating a call setup procedure according to the present invention.

In the call setup procedure according to the present invention described below, in the prior art according to FIG. It is conceived that it does not need to be performed later. That is, since the RRC connection between the UE 10 and the RNC 25 and the Iu signaling connection between the RNC 25 and the CN 30 are independent processes, the UE 10 sends an RRC connection request message. This is to reduce call setup time by sending initial direct transmission message at the same time. However, for this purpose, the bandwidth of a signaling radio bearer carrying an RRC message between the UE 10 and the RNC 25 is increased from the current 3.4 kbps to 13.6 kbps, or an improved data compression technology is introduced. Enemy modifications will have to be made.

As shown in FIG. 5, the UE 10 simultaneously requests an RRC connection and an Iu signaling connection by sending an initial direct transmission message to the RNC 25 simultaneously with the RRC connection request message (S130). The initial user terminal message is transmitted to the CN 30 (S140). Accordingly, the CN 30 transmits a direct transmission message (S150) to the RNC 25 (S150), and the received RNC 25 receives the RRC connection setup message and the downlink direct transmission message to the UE 10 at the same time. In step S160, the UE 10 transmits an RRC connection completion message to the RNC 25 (S170), thereby simultaneously completing the RRC connection and the Iu signaling connection. Since the following procedure is the same as in the case of FIG. 4, a detailed description thereof will be omitted.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As described above, according to the present invention, since the call setup time is shortened, it is possible to reduce the waiting time of the user and provide a quick communication service, and to improve the processing speed of the system to increase the efficiency of network operation.

Claims (4)

User terminal for receiving mobile communication service from WCDMA system, wireless network controller that controls radio resources in RNS and delivers data transmitted through UTRAN to appropriate node, and core network responsible for call processing or mobility control of subscriber. In the call processing method for shortening the call setup time in the WCDMA system configured to A first step of simultaneously receiving, by the wireless network controller, an RRC connection request message for requesting an RRC connection from the user terminal and an initial direct transmission message for requesting a signaling connection; A second step of the wireless network controller transmitting an RRC connection setting message to the user terminal, the RRC connection setting message including setting information necessary for a service requested from the user terminal in response to the RRC connection request message; A third step of the wireless network controller transmitting an initial user terminal message for signaling connection to the core network by the initial direct transmission message; A fourth step of transmitting, by the core network, the initial user terminal message and a direct transmission message, which is a message between the user terminal and the core network, to the wireless network controller in response thereto; And a fifth step of, when the wireless network controller receives the direct transmission message, transmitting a downlink direct transmission message for transmitting the direct transmission message to downlink to the user terminal. Call handling in. The method of claim 1, And said second step and said fifth step are performed simultaneously. User terminal for receiving mobile communication service from WCDMA system, wireless network controller that controls radio resources in RNS and delivers data transmitted through UTRAN to appropriate node, and core network responsible for call processing or mobility control of subscriber. In the call processing method for shortening the call setup time in the WCDMA system configured to A first step of the wireless network controller receiving an RRC connection request message for an RRC connection from the user terminal; A second step of receiving, by the wireless network controller, an initial direct transmission message for requesting a signaling connection from the user terminal; A third step of the wireless network controller transmitting an initial user terminal message for signaling connection to the core network by the initial direct transmission message; A fourth step of receiving, by the core network, the initial user terminal message and in response thereto, a direct transmission message, which is a message between the user terminal and the core network, to the wireless network controller; The RRC connection establishment message including the configuration information necessary for the service requested by the user terminal and the downlink direct transmission message for transmitting the direct transmission message in the fourth step downlink by the wireless network controller at the same time And a fifth step of transmitting to the terminal. The method of claim 3, wherein The first step and the second step is a call processing method, characterized in that performed simultaneously.

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