KR20060090378A - Method for application of logical group id in bearer indepent call control of a mobile communication system - Google Patents

Abstract

The present invention relates to a method for applying logical group ID on bearer independent call control (BICC) in a mobile communication system, wherein a BICC CIC is generated in connection with generating a call instance code (CIC) during data handling required for relay call processing in a core network. Grouping them, assigning a logical ID to the grouped CICs, and managing a state of the grouped CICs using the logical IDs.

Bearer Indepent Call Control Protocol (BICC), CIC, ISUP, Logical Id

Description

Application Method of Logical Group ID in Bearer Independent Call Control of Mobile Communication System {METHOD FOR APPLICATION OF LOGICAL GROUP ID IN BEARER INDEPENT CALL CONTROL OF A MOBILE COMMUNICATION SYSTEM}             

1 is a diagram showing a system configuration of a general mobile communication.

2 illustrates grouping of BICC CICs in accordance with a preferred embodiment of the present invention.

3 is a flowchart illustrating a grouping process of CICs according to a preferred embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearer independent call control (BICC) protocol of a mobile communication system. In particular, the present invention relates to a BICC call instance code on core network call processing using BICC. , Hereafter referred to as "CIC".

BICC is a signaling protocol used to support integrated services digital network (ISDN) services for network and terminal services in a broadband backbone network, and delivers information of bearers supporting voice or multimedia data. It also plays a role in delivering call signals and voice data to packet-based communication networks in public telephone networks or intelligent networks, and is also used for interlocking soft switches used to construct next-generation networks. Since the BICC has been extended based on the existing Signaling System 7 (SS7) signaling protocol that forms the existing public line switching network, it is easy to apply the existing telephone network to new services of the next-generation backbone and to link with the high-speed next-generation packet-based network. It is possible to easily realize the system, which enables the evolution from the existing network to the next generation network, and has the advantage of extending the existing protocol and applying it to the network.

The BICC protocol for core call processing in Asynchronous Transfer Mode (ATM) or IP Protocol Backbone networks is defined in ITU-T Q.1902.x, and in the ISUP (ISDN User Part) protocol. By defining BICC CIC, a Call Reference similar in concept to CIC (Circuit Identifiaction Code), a 4-byte range is defined as a CIC in the routing label of a signaling message for signaling. Assign to perform call processing.

At this time, the application that performs the BICC protocol call processing manages the status of the CIC according to the BICC CIC assignment for call setup, the management of the assigned CIC, and the maintenance message processing, and the protocol trace. Process.

The range of CICs used in the BICC protocol according to the prior art operating as described above is 4 bytes, and 4,294,967,296 CICs can be allocated and used. For reference, in the ISUP protocol of the E1 (Ethernet 1) link base, the E1 link having 32 channels may have a total of 4096 CICs generated by combining 7-bit pulse code modulation (PCM) values. Increasing subscribers and expanding networks require many physical E1 link cables. By comparison, BICC CIC can allocate or use CIC for call processing in the 4-byte range with one optical cable, which is effective in increasing subscriber or core network scalability.

However, the state management for the allocated CIC while performing call processing is mandatory.In the case of BICC, unlike ISUP which uses logical link of PCM unit, about 4 billion CIC CREATION and specific There was a problem that the performance and operation of CIC search for call setup and CIC scope definition and use for maintenance message processing are inefficient.

Accordingly, an object of the present invention, which is designed to solve the problems of the prior art operating as described above, is to set a BICC CIC having a range of 4 bytes when processing a core network call using the BICC protocol in an ATM or IP backbone network. It is defined as a logical group ID that includes a range of CICs to provide better efficiency in BICC CIC state management and operation.

In order to achieve the above object, an embodiment of the present invention provides a method for applying a logical group ID on bearer independent call control (BICC) of a mobile communication system, the data required for relay call processing in a core network. Grouping BICC CICs with respect to call instance code (CIC) generation during data handling, assigning logical IDs to the grouped CICs, and grouping the CICs using the logical IDs Characterize the process of managing the state for.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily flow the gist of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

1 is a diagram showing a system configuration of a general mobile communication.

The 3GPP mobile communication network includes a mobile switching center (hereinafter referred to as "MSC") and a radio network controller (hereinafter referred to as "RNC") 105 and 130 as shown in FIG. ), And a terminal (User Equipment, referred to as "UE") (100, 135), the MSC MSC server (115, 125) and the Media Gateway (Media GateWay, referred to as "MGW") (110) 120).

The MSC servers 115 and 125 serve as call agents that process for call setup in the mobile network, and the MGWs 110 and 120 perform a switching function to set up bearers under the control of the MSC server. .

The CIC control unit 120 performs BICC protocol call processing, and processes BICC CIC allocation for call setup, state management of the allocated CIC, and state management of CIC and protocol traces according to maintenance message processing.

The RNC 105 and 130 are controlled by the MSC while interfacing with the MSC and the UEs 100 and 135, and perform a call setup procedure by receiving a call setup request from the UEs 100 and 135 and the MSC.

In this case, when the core network is configured, other than a local call (including a gateway), the BICC protocol may be used for establishing a relay call between two or more MSCs when the bearer is ATM and IP.

The BICC protocol is a protocol that controls ATM or IP bearer setup independently of a bearer, and is processed similarly to ISUP in a message format and call processing procedure. Therefore, in ICC, it is necessary to consider allocation and state management for CIC like ISUP.

However, one of the only differences between ISUP and BICC is the CIC range in the routing label which is basically required for call setup. The CIC (Circuit Identification Code) in ISUP consists of 12 bits of PCM (7bit) + CH (5Bit) on E1 link base. CIC in BICC is used as the concept of Call Reference which has a range of 4 bytes.

Therefore, the present invention proposes a method of assigning a logical ID to a CIC value of a specific range for more efficient allocation and status management of the BICC CIC value of the 4 byte range.

It assigns a logical ID to the specific scope of BICC CIC, similar to ISUP's PCM, and is a maintenance message such as a current Group Block, Group Reset, or Group Query. ) Can handle up to 256 CICs, so for convenience of CIC maintenance, one logical ID is defined to include 256 CIC ranges. Logical IDs range from 0 to 2.

2 illustrates grouping of BICC CICs according to a preferred embodiment of the present invention.

As shown in FIG. 2, all CICs are grouped by 256 in a manner of allocating CIC_0 to CIC_255 as one group and allocating CIC_256 to CIC_511 as another group. Each group is assigned a logical ID.

3 is a flowchart illustrating a grouping process of CICs according to a preferred embodiment of the present invention.

In step 310, 256 groups are sequentially grouped for each CIC. In step 320, a logical group ID is assigned to each defined group, and in step 330, the states of the grouped CICs are managed using the logical IDs.

Data handling required for relay call processing in core network is as follows.

1) Signal point generation

2) Create Signal Link Set

3) Create signal link

4) Create Route

5) Create CIC for BICC

6) Create Route Sequence

7) Prefix generation

Regarding the CIC generation in 5) of the above procedure, it can be processed as follows.

That is, the CIC state can be managed for each group by using a logical identifier as a parameter in the BICC CIC generation, inquiry, deletion, and grouping commands as follows.

1) BICC CIC generation:

CRTE-CIC: OPC, DPC, Logical_Id , StartCIC, CicCnt, RouteNo;

Ex) CRTE-CIC: OPC, DPC, 0 , 1,256, RouteNo; // create 256 from CIC 1

CRTE-CIC: OPC, DPC, 1,256, RouteNo;

CRTE-CIC: OPC, DPC, 0 ,,, RouteNo;

Here, the OPC (Origin Point Code) is a signal point of its own station to indicate its own point code (Point Code) to the originating system, DPC (Destination Point Code) is a signal of another system connected to the OPC as a station signal point Is the point.

Start Call Instance Code (StartCIC) is the first starting CIC among CICs in the route, CicCnt represents the number of CICs, and RouteNO (Route Number) is a set of CICs for relay signaling between two systems. to be.

2) BICC CIC inquiry:

DIS-CIC-INF: OPC, DPC, Logical_Id , StartCIC, CicCnt, RouteNo;

Example) DIS-CIC-INF: OPC , DPC, 0, 1,256, RouteNo;

DIS-CIC-INF: OPC, DPC, 0 ,,, RouteNo;

The DIS-CIC-INF (Display Call Instance Code) outputs CIC information.

3) Delete BICC CIC:

DEL-CIC: OPC, DPC, Logical_Id , StartCIC, CicCnt, RouteNo;

Example) DEL-CIC: OPC, DPC , 0, 1,256, RouteNo;

DEL-CIC: OPC, DPC, 0 ,,, RouteNo

4) BICC CIC Group Block: // Group reset and group query are the same.

BLO-CIC: OPC, DPC, Logical_Id , StartCIC, CicCnt, RouteNo;

Example) BLO-CIC: OPC, DPC , 0, 1,256, RouteNo;

BLO-CIC: OPC, DPC, 0 ,,, RouteNo;

5) Protocol trace // BICC protocol trace when setting up call for CIC No.8

TYPE CATEGORY BCSG OPC DPC CIC (LOGGRPID / IDX)

BCSG ALL 1901 NAT / H'f6a NAT / H'12 0000000008 (00000000/008)

The BCSG (Bicc Cic Sub Group) is a logical number representing a set of CICs for Bicc and has the same meaning as the RouteNo.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible 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 defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

The present invention, by using the CIC data by assigning the logical group ID of the BICC CIC, it is possible to create / query / delete for each logical ID unit without giving a specific range during CIC creation / query / deletion, CIC group maintenance message In processing, processing by logical ID is possible. In addition, it is easy to identify a specific CIC value for a protocol trace specific logical ID, and thus, it is convenient to operate by searching with a logical ID when inquiring CIC status.

Claims (4)

A method for applying logical group ID on bearer independent call control (BICC) in a mobile communication system, Grouping BICC CICs with respect to call instance code (CIC) generation during data handling work required for relay call processing in the core network; Allocating logical IDs to the grouped CICs; And managing a state of the grouped CICs using the logical ID. The method of claim 1, wherein the grouping process comprises: And separating the 256 CICs into one group. The method of claim 1, wherein the logical ID is, Said method, characterized in that it ranges from 0 to ²⁴ . The method of claim 1, wherein the managing process comprises: Applying CIC generation / view / deletion and CIC group maintenance message processing to each logical ID; Protocol tracing The method comprising the step of identifying specific CICs for a specific logical ID, and applying to query with the logical ID when the CIC status query.

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