KR20010066276A - Call proceeding method of mobile communication system - Google Patents

Abstract

PURPOSE: A method for processing a call of a mobile communication system is provided to improve a BHCA(Busy Hour Call Attempt) of an RNC(Radio Network Controller) by efficiently decreasing a load to an assignment of an RAB(Radio Access Bearer) when processing a transmitting call or a receiving call in the RNC. CONSTITUTION: A user equipment(UE) requests a RRC(Radio Resource Control) connection to an RNC(Radio Network Controller)(S400). The RNC instructs a radio link setup to a base station using a bearer capability variable value extracted from an improved RRC connection request message and a bearer capability table(S401). The base station responds to the radio link setup(S402). The RRC connection setup is performed between the UE and the RNC(S403). The UE directly transmits mobile station capability information and a CM service request to the RNC(S404,S405). The RNC transmits an initial mobile station message for requesting a CM service to a core network(CN)(S406). The CN transmits a CM service acceptance message to the RNC(S407). The RNC transmits the CM service acceptance message to the UE(S408). The UE transmits a setup message to the RNC, and the RNC transmits the setup message to the CN. The CN transmits a call progress message to the RNC. The RNC transmits the call progress message to the UE.

Description

Call proceeding method of mobile communication system

TECHNICAL FIELD The present invention relates to the next generation mobile communication, and is particularly suitable for efficiently assigning a radio access bearer (RAB) by a radio network controller (RNC) in a next generation mobile communication system using a direct spread (DS) scheme. It relates to a call setup method of the communication system.

In general, IMT-2000, the next generation mobile communication system, means 'future land and land mobile communication system'. It can transmit multimedia information such as text and video in addition to voice, and enables international roaming. It provides a wireless communication service to a user through a mobile station.

1 is a block diagram illustrating a conventional next generation mobile communication system.

Referring to FIG. 1, the conventional next-generation mobile communication system includes base stations 101a to 101n for wirelessly connecting mobile stations 100a to 100n, mobile stations 100a to 100n, and connecting outgoing or incoming calls, and base stations 101a to 101n. Wireless network controllers 102a to 102p for controlling the network), a base station manager (BSM) 103a to 103p for analyzing and storing traffic generated in each of the base stations 101a to 101n, and An exchange station 104 that processes outgoing or incoming calls with mobile stations 100a-100n, and a home location register (HLR) 105 that registers and manages location information of mobile stations 100a-100n. do. The base station 101a to 101n and the radio network controllers 102a to 102p include a radio access network (RAN), a switching center 104 and a subscriber location register 105, and a core network (Core Network, CN).

The mobile stations 100a to 100n may be connected to a plurality of radio access networks (RANs) according to movement, and other communication networks such as a public switched telephone network (PSTN), an internet network, and a packet data network may be provided in the core network CN. Can be connected.

As described above, in the conventional next generation mobile communication system, several radio network controllers 102a to 102p are connected to one switching station 104, and several base stations 101a to 101n are connected to each radio network controller 102a to 102p. .

In this case, any radio network controller (RNC) transmits each signaling message using a core network (CN), another radio network controller (RNC), and a base station and an asynchronous transmission mode (ATM) as a back bone. 2, lu, lur, and lub interfaces should be provided. In addition, an access link control application part (ALCAP) protocol must be provided for a data transport bearer.

The lu interface refers to a radio access network application part (RANAP) that processes a protocol stack and a message for losslessly transferring signaling messages between a radio network controller (RNC) and a core network (CN), and the lur interface is a wireless network. Refers to the RNSAP (Radio Network Subsystem Application Part) that processes the protocol stack and messages for losslessly transferring signaling messages between the controller RNC and the other RNC, and the lub interface refers to the RNC and the RNC. Refers to a Node B Application Part (NBAP) that processes a protocol stack and messages for losslessly delivering signaling messages between base stations managed by a radio network controller (RNC).

In addition, the radio network controller (RNC) must provide a radio resource control (RRC) connection establishment process for establishing a signaling bearer with a mobile station (UE).

That is, in order for the mobile station UE to receive or transmit a paging message, the RNC needs to establish a signaling path, which is a radio resource in the DS method. This is referred to as the control (RRC) connection establishment process.

The radio resource control (RRC) connection establishment process requires a radio link establishment process between the RNC and the base station, and setup of bearer capacity information indicating the performance of the bearer is required.

3 is a flowchart illustrating a call processing procedure of a conventional mobile communication system.

Referring to FIG. 3, FIG. 3 illustrates a radio resource control (RRC) connection establishment process when a mobile station (UE) originates. As shown in FIG. 3, a radio access bearer setup process occurs twice during a radio resource control (RRC) connection setup process.

In more detail, the mobile station UE requests a radio resource control (RRC) connection to a radio network controller (RNC) (S300). The radio network controller (RNC) then instructs the base station to set up the radio link (S301), and accordingly, the base station makes a radio link setup response (S302). According to the procedure, a radio resource control (RRC) connection setup is performed between the mobile station UE and a radio network controller (RNC) (S303).

Thereafter, a call control message processing procedure is performed between the mobile station UE and the radio network controller RNC (S304 to S312).

That is, the mobile station UE directly transmits the mobile station capacity information and the CM service request message to the radio network controller (RNC) (S304 and S305), and the radio network controller (RNC) sends an initial mobile station message requesting the CM service to the core network. (C306) (S306). Then, the core network CN transmits the CM service acceptance message to the radio network controller RNC (S307), and accordingly, the radio network controller RNC transmits the CM service acceptance message to the mobile station UE (S308). Subsequently, the mobile station UE transmits a setup message to the radio network controller RNC (S309), and the radio network controller RNC transmits a setup message to the core network CN (S310). Then, the core network CN transmits the call progress message to the radio network controller RNC (S311), and the radio network controller RNC transmits the call progress message to the mobile station UE (S312).

When the call control message processing procedure is completed, the core network (CN) transmits a radio access bearer (RAB) allocation request message to the radio network controller (RNC), and the radio network controller (RNC) sends a radio link reconfirmation message to the base station. It transmits (S314). Then, the base station transmits a radio link reconfirmation response message to the radio network controller (RNC) (S315). The radio network controller (RNC) receiving the radio link reconfirmation response message sets up a radio access bearer (RAB) setup with the mobile station UE. After the completion, a radio access bearer (RAB) allocation completion message is transmitted to the core network CN (S316 to S318).

However, in the call processing method of the conventional mobile communication system, the radio access bearer (RAB) setup process occurs twice as described above. In other words, when the radio resource control (RRC) connection is established and when the radio access bearer (RAB) allocation request message is received from the core network (CN), setting or changing operations are required for each base station and mobile station.

Therefore, there is a problem in that the load for the internal signaling processing increases in the radio network controller (RNC) for each call processing by the two radio access bearer (RAB) setup processes.

Therefore, there is a need for a method of integrating a radio access bearer (RAB) setup process that occurs twice.

Accordingly, an object of the present invention has been made in view of the above-mentioned problems of the prior art, and is a mobile communication system which allocates a call efficiently by integrating a radio access bearer (RAB) setup process among call setup processes of a mobile communication system. It is to provide a call processing method of.

According to an aspect of the present invention for achieving the above object, a call processing method of a mobile communication system includes a mobile station, a base station for wireless connection with the mobile station, a wireless network controller for controlling the base station, and origination of the mobile station. And a core network (CN) for processing an incoming call, comprising: a first step of the radio network controller configuring a bearer capacity table using program loading data (PLD) at initialization; A second step of requesting connection of a radio link by transmitting bearer capacity information having data information when the mobile station makes a call to the radio network controller; and the radio network controller providing the transmitted bearer capacity information and the configured bearer capacity table. To establish a radio access bearer to accommodate the bearer capacity requested by the mobile station to the base station. And a fourth step of, when the core network requests allocation of a radio access bearer, the radio network controller completes the assignment of a radio access bearer requested by the core network using the set radio access bearer. .

Preferably, the first step includes transmitting, by the control station manager managing the radio network controller, program loading data for distinguishing the bearer capacity to the radio network controller, and by the transmitted program loading data. And configuring the bearer capacity table according to a bearer capacity variable value.

Further, in step 2, the mobile station transmits an enhanced radio link connection message in which the bearer capacity information is inserted, and in the third step, the radio network controller broadcasts system information to the mobile station to bear the bearer capacity. Share the information.

1 is a block diagram showing a part of a next generation mobile communication system according to the prior art;

FIG. 2 is a view for explaining an interface method between systems in the mobile communication system shown in FIG. 1; FIG.

3 is a flowchart illustrating a call processing procedure of a conventional mobile communication system.

4 is a flowchart illustrating a call processing procedure of a mobile communication system according to the present invention.

The present invention proposes a call processing method of a mobile communication system that efficiently processes a call by integrating a radio access bearer (RAB) setup process in a call processing of a radio network controller (RNC) in a GSM-DS-based next-generation communication system. do.

To this end, in the present invention, in order to reduce the load on the repeated allocation of the radio access bearer (RAB), the bearer capability information is included in the radio resource control (RRC) connection establishment and transmitted to the radio network with the CN. Reducing the signaling message between the radio network controller (RNC) and the base station or radio network controller (RNC) and the mobile station (UE) upon notification of the access bearer (RAB) allocation.

In particular, the present invention provides an enhanced radio resource control (RRC) connection request message in which bearer capacity information is included in a radio resource control (RRC) connection request message transmitted from a mobile station (UE) when establishing a radio resource control (RRC) connection. It proposes an RRC Connection Request Message, and also, in order to share bearer capacity information between a mobile station (UE) and a radio network controller (RNC) when establishing a radio resource control (RRC) connection, the radio network controller (RNC) is a mobile station (UE). Broadcasts system information.

In addition, the RNC extracts information such as a data rate upon receiving a RRC connection request message by creating a bearer capability table according to a bearer capacity variable value.

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

The system configuration for performing the call processing method according to the present invention is the same as that of FIG.

However, the length of a radio resource control (RRC) connection request message is increased in a channel-to-channel radio protocol of a mobile station (UE) and a base station. Since it does not include information on bearer capacity when generating a radio resource control (RRC) connection request message between a mobile station (UE) and a base station, a radio message for transmission of this information is made.

At this time, the system information is broadcast so that the bearer capacity divided by the additionally allocated bits can be smoothly interpreted by the radio network controller (RNC) and the mobile station (UE).

In the present invention, in order to share bearer capacity information between a mobile station (UE) and a radio network controller (RNC), 8 Kbps voice: 0, 64 Kbps data: 1, 384 Kbps video: 2, 2 Mbps: 3 are divided.

The division of the bearer capacity should be determined by the radio network controller (RNC). To this end, the BSM stores Program Loading Data (PLD) and transmits the stored program loading data (PLD) to the radio network controller (RNC) when the radio network controller (RNC) is driven. This creates a database of bearer capacity.

At this time, the bearer capacity information is broadcasted to the mobile station (UE) through a system information message.

After this process, when requesting a specific bearer capacity between the mobile station (UE) and the radio network controller (RNC) it is possible to use the same variable value.

After the configuration process of the bearer capacity table described above is preceded, the call processing process of the mobile communication system according to the present invention is as follows.

4 is a flowchart illustrating a call processing procedure of a mobile communication system according to the present invention.

Referring to FIG. 4, the mobile station UE requests a radio resource control (RRC) connection to a radio network controller (RNC) (S400). At this time, the mobile station UE transmits an enhanced RRC connection request message to the radio network controller RNC. The enhanced radio resource control (RRC) connection request message includes a variable for distinguishing bearer capacity in a parameter of an existing radio resource control (RRC) connection request message.

The RNC then configures and maintains the bearer capacity table according to the bearer capacity variable value by using the program loading data PLD received from the control station manager BSM. Use the configured bearer capacity table.

Therefore, the radio network controller (RNC) instructs the radio link setup to the base station by using the bearer capacity variable value and the bearer capacity table extracted from the enhanced radio resource control (RRC) connection request message (S401). That is, the radio network controller (RNC) sets up a radio access bearer (RAB) that accommodates an appropriate bearer capacity during radio link setup to a base station.

The base station then performs a radio link setup response (S402). According to the procedure, a radio resource control (RRC) connection setup is performed between the mobile station UE and a radio network controller (RNC) (S403).

When the radio resource control (RRC) connection setup process is completed, call control message processing such as CM service request and setup is performed in the same manner as in the existing procedures (S404 to S412).

That is, the mobile station UE directly transmits the mobile station capacity information and the CM service request to the radio network controller (RNC) (S404 and S405), and the radio network controller (RNC) sends an initial mobile station message requesting the CM service to the core network ( CN) (S406). Then, the core network CN transmits the CM service acceptance message to the radio network controller RNC (S407), and accordingly, the radio network controller RNC transmits the CM service acceptance message to the mobile station UE (S408). Subsequently, the mobile station UE transmits a setup message to the radio network controller RNC (S409), and the radio network controller RNC transmits a setup message to the core network CN (S410). Then, the core network CN transmits the call progress message to the radio network controller RNC (S411), and the radio network controller RNC transmits the call progress message to the mobile station UE (S412).

After the call control message processing procedure is completed, when a radio access bearer (RAB) allocation request message is received from the core network (CN) (S413), the radio network controller (RNC) immediately receives a radio access bearer allocation completion message (Radio Access). Bearer Assignment Complete Message) is transmitted to the core network (CN) (S414).

After receiving the radio access bearer allocation request message from the core network (CN) as in step S414, the RRC link reconfirmation processing procedure is not performed as in the prior art in order to provide a call service to the mobile station (UE). The notification process for the allocation of P is generated because it is already performed during the radio resource control (RRC) connection establishment process.

In addition, since the call processing method according to the present invention is applied to an incoming call of a mobile station (UE), it is possible to considerably reduce the load during outgoing and incoming call processing of the radio network controller (RNC).

In addition, in terms of signaling procedures, from the RNC to the control primitive control of RLC (Radio Link Control), MAC (Medium Access Control), L 1 (Layer 1), etc. This can result in significant load reduction.

According to the call processing method of the mobile communication system according to the present invention as described above, in the next generation mobile communication system of the GSM-DS method, a radio access bearer (e.g., a radio access bearer during outgoing or incoming call processing in a radio network controller (RNC)) Since the load on the RAB) allocation can be effectively reduced, the busy hour call attempt (BHCA) of the radio network controller (RNC) is improved.

Claims (3)

A call processing method of a mobile communication system comprising a mobile station, a base station wirelessly connected to the mobile station, a radio network controller controlling the base station, and a core network (CN) for processing outgoing and incoming calls of the mobile station, A first step of the radio network controller configuring a bearer capacity table using program loading data (PLD) at initialization; A second step of requesting connection of a radio link by transmitting bearer capacity information having data information when the mobile station calls to the radio network controller; A third step of setting, by the radio network controller, a radio access bearer that accepts the bearer capacity requested by the mobile station to the base station by using the transmitted bearer capacity information and the configured bearer capacity table; When the core network requests allocation of a radio access bearer, the radio network controller comprises a fourth step of completing the assignment of a radio access bearer requested by the core network using the set radio access bearer. How to handle calls in the system. The method of claim 1, wherein the first step, Transmitting program loading data for distinguishing the bearer capacity to the radio network controller in a control station manager managing the radio network controller; And constructing the bearer capacity table according to each bearer capacity variable value by the transmitted program loading data. The method of claim 1, wherein in the third step, And the radio network controller broadcasts system information to the mobile station to share the bearer capacity information.