KR101110927B1 - Call Setup Method for Asynchronous Mobile Communication Network - Google Patents

Abstract

We propose a voice call setup method to simplify the voice call setup procedure in an asynchronous mobile communication network.

In the call setup method of the present invention, the RRC connection setup procedure is performed by the radio network controller according to the origination request of the mobile communication terminal, and when the originating mobile communication terminal transmits a setup message to the exchange through the radio network controller, Determining a radio access bearer (RAB) parameter from the information included in the setup message, establishing a radio link with the node B, and reporting that the exchange is performing call setup processing to the mobile communication terminal; The RAB parameter is determined from the information included in the mobile communication terminal and the radio bearer is set, and the exchange transmits the RAB setup request message to the radio network controller, the RAB parameter determined by the radio network controller from the setup message, and the exchange Check if the RAB parameters received from the RAB parameters match, and if the RAB parameters match, According to the present invention, it is possible to shorten the time required for call setup by simplifying a call setup procedure in an asynchronous mobile communication network.

Asynchronous, call setup procedure

Description

Call setup method for asynchronous mobile communication network

1 is a flowchart illustrating a general call setup method in an asynchronous mobile communication network;

2 is a schematic diagram of a mobile communication network to which the present invention is applied;

3 is a flowchart illustrating a call setup method in an asynchronous mobile communication network according to an embodiment of the present invention;

4 is a flowchart illustrating a call setup method in an asynchronous mobile communication network according to another embodiment of the present invention.

Description of the Related Art [0002]

10: mobile communication terminal 210, 212: Node B

220: wireless network controller 230: switchboard

240: home location register 250: SGSN

260: GGSN 30: Internet

The present invention relates to a call setup method in a mobile communication network, and more particularly, to a voice call setup method for simplifying a voice call setup procedure in an asynchronous mobile communication network.

The asynchronous mobile communication system represented by the WCDMA mobile communication system is a system proposed for high quality multimedia service. The asynchronous mobile communication system supports the high-speed data service and guarantees the mobility of the mobile communication terminal. The service coverage is gradually expanded. . The asynchronous mobile communication system can provide not only voice call service provided by 2nd and 2.5th generation mobile communication services but also data service at speeds up to 10 times higher than 2nd and 2.5th generation mobile communication services. , VOD service, etc. can be used with high quality.

However, in the asynchronous mobile communication network, the voice call processing procedure is more complicated than the CDMA mobile communication network, resulting in an excessive time for call setup.

1 is a flowchart illustrating a general call setup method in an asynchronous mobile communication network. For convenience of explanation, components of a called party, i.e., a mobile communication terminal, a Node B, a wireless network controller, and a switch, are not shown. Only components are shown.

The transmission attempt from the mobile communication terminal is transmitted to the Radio Network Controller (RNC) through the Node B, and accordingly, a Radio Resource Control (RRC) connection establishment procedure is performed (S101). According to the RRC connection establishment procedure, control information necessary for radio resource management is exchanged between the mobile communication terminal and the radio network controller, and a radio channel is established so that a call establishment message can be transmitted to the exchange.

Subsequently, the originating mobile communication terminal transmits a setup message to the exchange (S103). The setup message includes basic information necessary for the mobile communication terminal to set up a call such as a service type, a transmission speed, and a data type. The type of call is determined based on this.

The exchange receiving the setup message reports to the calling mobile communication terminal that the call setup procedure is in progress (Call Proceeding) (S105). Then, based on the basic information included in the setup message received from the mobile communication terminal, the radio network controller requests the RAB (Radio Access Bearer) setting (S107). Here, the RAB includes parameters for establishing a connection between the radio network controller and the node B, the node B, and the mobile communication terminal.

According to the RAB configuration request of the exchange, the radio network controller establishes a connection between the Node B and a wired section, and establishes a Radio Link (RL) to provide information necessary for establishing a radio section between the Node B and the mobile communication terminal. (S109). Thereafter, the radio network controller sets up a radio bearer (RB) for setting a radio section with the mobile communication terminal based on the parameters included in the RAB (S111).

On the other hand, although not shown in the above process, the exchange inquires about the exchange information to which the called-party mobile communication terminal is connected by referring to the called-party mobile communication terminal number transmitted together when the mobile communication terminal attempts to make a call. Perform call setup with.

In this way, as the originating mobile communication terminal connects to the exchange through the Node B and the radio network controller, and the connection between the originating exchange is completed and the terminating exchange performs paging to the terminating terminal, the exchange receives the originating mobile communication terminal. Report that the alerting to the side is being performed (ALERT) (S113).

When the called terminal responds to paging, it reports it to the mobile communication terminal (CONNECT) (S115), and when a response message is transmitted from the mobile communication terminal to the exchange (CONNECT ACK), a call between the two mobile communication terminals is started. (S117).

As can be seen from the call setup procedure, after the setup message is transmitted to the mobile communication terminal switch, the radio network controller receives the RAB setup request message and sequentially performs the radio link and radio bearer setup process. The setting procedure is complicated, and thus there is a problem that the quality of service is degraded.

The present invention has been made to solve the above-mentioned disadvantages and problems, and there is a technical problem to provide a voice call setup method that can simplify the voice call setup procedure in an asynchronous mobile communication network.

According to an aspect of the present invention, there is provided a call setup method in an asynchronous mobile communication network, the method comprising: performing a radio resource control (RRC) connection setup procedure by a radio network controller according to an origination request of an originating mobile communication terminal; As the originating mobile communication terminal transmits a setup message to the exchange through the radio network controller, the radio network controller determines a radio access bearer (RAB) parameter from the information included in the setup message and establishes a radio link with the node B. At the same time, reporting that the switch is performing call setup processing to the mobile communication terminal; The wireless network controller determines a RAB parameter from the information included in the setup message to perform a radio bearer setup process with the mobile communication terminal, and the exchange sends a RAB setup request message including the RAB parameter to the wireless network controller. Transmitting; Confirming, by the radio network controller, whether the RAB parameter determined from the setup message and the RAB parameter received from the exchange match; If the RAB parameters match, connecting the mobile terminal to a switch; And receiving, by the mobile communication terminal, alerting information of the called terminal from the exchange.

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

2 is a schematic diagram of a mobile communication network to which the present invention is applied.

As shown, the asynchronous mobile communication network performs a wireless section communication with the mobile communication terminal 10 and includes a plurality of Node Bs 210 and 212 and a plurality of Node Bs 210 and 212 having functions such as channel coding and interleaving. Is connected to a radio network controller (RNC, 220) and a radio network controller 220 to control the Node B (210) and the control of radio resources to provide a voice service to the mobile communication terminal (10). Asynchronous switch (MSC) 230 for performing call exchange, home location register (HLR) 240 connected with the switch 230 and storing and managing location information, additional service information, etc. of subscribers of asynchronous mobile communication network, wireless network controller ( Serving GPRS Support Node (SGSN) 250, which is connected between a 220) and a General Packet Radio Service (GPRS) network (not shown) to maintain a location track of the mobile communication terminal 10 and perform access control and security functions. SGSN 250 and GPRS (General Packet Radio Service) network Connected through a N) and is connected to the Internet 30 it includes a GGSN (Gateway GPRS Support Node, 260) to support interworking with external packets.

A simplified call setup procedure in an asynchronous mobile communication network having such a configuration will be described with reference to FIG. 3 as follows.

3 is a flowchart illustrating a call setup method in an asynchronous mobile communication network according to an embodiment of the present invention. In this embodiment, only the calling party components, that is, the calling mobile communication terminal, the Node B, the radio network controller, and the switching unit are shown for convenience of description, and the called party components are omitted.

The transmission attempt from the mobile communication terminal is transmitted to the radio network controller (RNC) through the node B, and accordingly, a radio resource control (RRC) connection establishment procedure is performed (S201). According to the RRC connection establishment procedure, control information necessary for radio resource management is exchanged between the mobile communication terminal and the radio network controller, and a radio channel is established so that a call establishment message can be transmitted to the exchange.

Thereafter, the calling mobile communication terminal transmits a setup message to the exchange through the radio network controller (S203). The setup message includes basic information necessary for the mobile communication terminal to set up a call such as service type, transmission speed, and data type. Based on this basic information, the type of call is determined.

In this case, the radio network controller may extract information included in the setup message transmitted from the mobile communication terminal, determine the RAB parameter therefrom, and immediately perform radio link setup and radio bearer setup. That is, the radio link and the radio bearer are not set up according to the RAB establishment request from the exchange, but the radio link and the radio bearer are set up using the setup message transmitted by the mobile communication terminal.

Referring to FIG. 3, after the setup message is transmitted from the mobile communication terminal to the exchange, the wireless network controller determines the RAB parameter from the information included in the setup message, and then immediately needs information for connecting to the node B and establishing a wireless section. To set the radio link (RL) to provide a, and at the same time as this process, the exchange reports that the call setup procedure is in progress to the mobile communication terminal (RL setting) (Call Proceeding) (S205).

Then, the radio network controller determines the RAB parameter from the information included in the setup message and performs radio bearer (RB) setup for the wireless section connection with the mobile communication terminal. A RAB (Radio Access Bearer) setting is requested (S207). Here, the RAB setup request message includes a parameter for establishing a connection between the radio network controller and the node B, the node B and the mobile communication terminal, and the radio network controller matches the RAB parameter determined from the setup message and the RAB parameter received from the exchange. Check it.

This parallel processing is possible because the RAB parameter that the exchange sends to the radio network controller is based on the setup message. Therefore, when the radio network controller transmits the setup message received from the mobile terminal to the exchange, it is included in the setup message. Basic information can be extracted and based on this, radio link and radio bearer can be established.

On the other hand, although not shown in the above process, the exchange inquires about the exchange information to which the called-party mobile communication terminal is connected by referring to the called-party mobile communication terminal number transmitted together when the mobile communication terminal attempts to make a call. Perform call setup with.

If there is no error in the radio link and radio bearer setup as a result of the check of the radio network controller, that is, when the RAB parameter determined from the setup message and the RAB parameter received from the exchange are the same, the originating mobile communication terminal is exchanged through the node B and the radio network controller. As the connection between the originating exchange is completed and the terminating exchange performs paging to the terminating terminal, the exchange reports that the alerting to the terminating side is being performed to the calling mobile communication terminal (ALERT) (S209).

When the called terminal responds to paging, it reports it to the mobile communication terminal (CONNECT) (S211), and when a response message is transmitted from the mobile communication terminal to the exchange (CONNECT ACK), a call is started between the two mobile communication terminals. (S213).

As such, the wireless network controller checks the setup message received from the mobile communication terminal, sets up the radio link and the radio bearer before receiving the RAB setup request message from the exchange, and this setup process is performed in parallel with the other call setup process. The voice call setup process can be shortened.

4 is a flowchart illustrating a call setup method in an asynchronous mobile communication network according to another embodiment of the present invention.

In the call setup method according to an embodiment of the present invention described with reference to FIG. 3, the wireless network controller performs a radio link and radio bearer setup procedure based on the RAB parameter determined from the information included in the setup message, and then receives it from the exchange. The RAB parameter is used to verify that there are no errors in the radio link and radio bearer setup. In this case, when the RAB parameter is changed due to environmental changes in the mobile communication system and the wireless network, the radio link and the radio bearer should be reset, and the call setup process for this is shown in FIG. 4.

The transmission attempt from the mobile communication terminal is transmitted to the radio network controller (RNC) through the node B, and accordingly, a radio resource control (RRC) connection setup procedure is performed (S301). According to the RRC connection establishment procedure, control information necessary for radio resource management is exchanged between the mobile communication terminal and the radio network controller, and a radio channel is established so that a call establishment message can be transmitted to the exchange.

Subsequently, the outgoing mobile communication terminal transmits a setup message to the exchange through the radio network controller (S303). The setup message includes basic information necessary for the mobile communication terminal to set up a call such as service type, transmission speed, and data type. Based on this basic information, the type of call is determined.

In this case, the radio network controller may extract information included in the setup message transmitted from the mobile communication terminal, determine the RAB parameter therefrom, and immediately perform radio link setup and radio bearer setup. Referring to FIG. 4, after the setup message is transmitted from the mobile communication terminal to the exchange, the wireless network controller determines the RAB parameter from the information included in the setup message and is required for the wired segment connection with the node B and the wireless segment set up. A radio link (RL) for providing information is established, and at the same time as this process is performed, the exchange reports that a call setup procedure is in progress to the mobile communication terminal (RL setting) (Call Proceeding) (S305).

Then, the radio network controller determines the RAB parameter from the information included in the setup message and performs radio bearer (RB) setup for the wireless section connection with the mobile communication terminal. A RAB (Radio Access Bearer) setting is requested (S307). Here, the RAB setup request message includes a parameter for establishing a connection between the radio network controller and the node B, the node B and the mobile communication terminal, and the radio network controller matches the RAB parameter determined from the setup message and the RAB parameter received from the exchange. Check it.

If the RAB parameters do not match, the radio network controller resets the radio link with the node B according to the RAB parameter received from the exchange (S309), and resets the radio bearer with the mobile communication terminal (S311). .

On the other hand, although not shown in the above process, the exchange inquires about the exchange information to which the called-party mobile communication terminal is connected by referring to the called-party mobile communication terminal number transmitted together when the mobile communication terminal attempts to make a call. The call setting is performed by the caller, and the calling mobile communication terminal is connected to the exchange through the node B and the wireless network controller by the above process, and the connection between the originating exchange is completed and the terminating exchange performs paging to the called terminal. Accordingly, the exchange reports that the alerting to the called party is being performed to the calling mobile communication terminal (ALERT) (S313).

When the called terminal responds to paging, it reports it to the mobile communication terminal (CONNECT) (S315), and when a response message is transmitted from the mobile communication terminal to the exchange (CONNECT ACK), a call is started between the two mobile communication terminals. (S317).

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, the radio link setup process is paralleled with the call setup process reporting process by the RAB parameter determined from the setup message transmitted from the mobile communication terminal for call setup, and the radio bearer setup process is parallel with the RAB setup request process. By doing so, the call setup procedure in the asynchronous mobile communication network can be simplified. In this case, the call setup time is actually shortened to about 1 to 2 seconds, thereby obtaining an effect of improving the quality of service.

Claims (4)

Call setup method in an asynchronous mobile communication network, Performing a radio resource control (RRC) connection establishment procedure by the radio network controller according to an origination request of an originating mobile communication terminal; As the originating mobile communication terminal transmits a setup message to the exchange through the radio network controller, the radio network controller determines a radio access bearer (RAB) parameter from the information included in the setup message and establishes a radio link with the node B. Reporting that the exchange is performing call setup processing to the mobile communication terminal; The wireless network controller determines a RAB parameter from the information included in the setup message to perform a radio bearer setup process with the mobile communication terminal, and the exchange sends a RAB setup request message including the RAB parameter to the wireless network controller. Transmitting; Confirming, by the radio network controller, whether the RAB parameter determined from the setup message and the RAB parameter received from the exchange match; If the RAB parameters match, connecting the mobile terminal to a switch; And Receiving, by the mobile communication terminal, alerting information of the called terminal from the exchange; Including, The setup message includes a service type, a transmission speed and a data type. delete The method of claim 1, The RAB parameter includes a parameter for establishing a connection between a radio network controller and a node B, a node B, and a mobile communication terminal. The method of claim 1, If the RAB parameter does not match after the RAB parameter determined from the setup message and the RAB parameter received from the switch match, the RAB parameter received from the switch by the wireless network controller Resetting a radio link with the Node B with reference to; Resetting, by the radio network controller, the radio bearer with the mobile communication terminal by referring to the RAB parameter received from the exchange; Connecting the mobile communication terminal to a switchboard; And Receiving, by the mobile communication terminal, alerting information of the called terminal from the exchange; Call establishment method in an asynchronous mobile communication network comprising a.

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