KR20010063175A - The next-generation switching system implemented aal2 - Google Patents

Abstract

PURPOSE: A next generation switching system applying an AAL2(ATM(Asynchronous Transfer Mode) Adaptation Layer-2) is provided to use an AAL2/ATM transmission system to eliminate inefficiency of channel use, so as to reduce investment costs according to the increase of subscribers. CONSTITUTION: A TP(Transport Platform,10) has a function of switching subscriber data and a protocol function of delivering layer-3 signaling message. An MIP(Managed Intelligent Platform,20) connected to the TP(10) receives a layer-3 message to control the switching function of the TP(10), and has a function of providing various services.

Description

Next-Generation Exchange System Applying AA2 {THE NEXT-GENERATION SWITCHING SYSTEM IMPLEMENTED AAL2}

The present invention relates to a next-generation exchange system to which AAL2 is applied, and more particularly, to a next-generation exchange system that can efficiently use channel using the AAL2 / ATM transmission method.

1 is a block diagram of a digital mobile network according to an embodiment of the present invention, and shows an example of a commercial code division multi-access (CDMA) digital mobile network. The mobile network of FIG. 1 includes a switching center including a mobile switching center (MSC) 100 as a switch, a home location register (HLR) 106 as a location register, and a plurality of base station controllers (BSCs) 108 as base station controllers; It is composed of a plurality of base transceiver station (BTS) (110) which is a base station connected to each BSC (108), and connected wirelessly with a plurality of mobile radio terminals (112) Public Switched Telephone Network (PSTN) which is a general public telephone network And a public land mobile network (PLMN) 102. The BSC 108 performs radio link and wired link control, hand-off functions. The BTS 110 configures a wireless communication path and manages a radio resource together with the mobile wireless terminal 112. The HLR 106 performs a subscriber location registration function and registers different ENS values corresponding to each subscriber number to enable communication service with the corresponding mobile wireless terminal when the terminal priority change request is received from the mobile wireless terminal.

However, such a digital mobile wireless mobile network is connected by the E1 line between the MSC 100 and the BSC 110 and between the BSC 108 and the BTS 110, and the E1 line has 32 channels and 64 Kbps per channel. Transfer data at speed. Among them, subscriber can use 30 channels except 0 and 16. Therefore, using E1 in the STM mode accommodates 30 subscribers per E1 line. One subscriber per channel, the channel assigned to the subscriber, cannot be used for another subscriber until the subscriber hangs up, even if the subscriber does not use it. In other words, channel use is inefficient. Therefore, as the number of subscribers expected to be used increases, physical E1 lines need to be expanded, and investment costs are proportional to the number of subscribers.

Accordingly, an object of the present invention is to provide a next-generation exchange system using AAL2 that can reduce the investment cost due to the increase in the number of subscribers by eliminating the inefficiency of the channel using the AAL2 / ATM transmission method in the wireless mobile network system.

1 is a block diagram of a digital mobile network according to an embodiment of the present invention

2 is a block diagram of a mobile network having a next-generation exchange system according to an embodiment of the present invention.

3 is a block diagram of a next-generation exchange system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 is a block diagram of a mobile network having a next-generation exchange system according to an embodiment of the present invention,

3 is a block diagram of a next-generation exchange system according to an embodiment of the present invention.

It consists of a transport platform (TP) 10 and an intelligent management platform (MIP) 20. The TP 10 is composed of an AAL2 message transmission protocol unit 11, an AAL2 connection control unit 12, a TP switch 13, and an interface module 14 to switch subscriber data and layer 3. It has protocol function to deliver Signaling Message (AAL2 Signaling, RANAP).

The MIP 20 is composed of an Access Control Function (ACF) 21, a TP Interface Function (TIF) 23, an ATM VCC 22, and a Service Switching Function / Call Control Function (SSSF / CCF) 24. Receives a message to control the switching function of the TP 10, and has a function to provide a variety of services The ACF 21 is composed of an AAL2 signaling unit 25 and RANAP (Radio Access Network Application).

First, the ATM VCC 22 is responsible for releasing the AAL2 path for use by the AAL2A signaling unit 25 of the MIP 20. The AAL2 signaling section 25 receives the AAL2 pass information released from the ATM VCC 22 and updates the routing table. In other words, upon receiving the setting notification, it is added to the routing table, and upon receiving the release notification, the path information is deleted from the routing table. The AAL2 signaling unit 25 receives the AAL2 signaling message from the TP 20 to process the AAL2 protocol (for example, Q.21501., MTP-3b, SSCF, SSCOP, AAL5 / ATM), and sets up the AAL2 channel. If requested, the routing table is determined to determine whether the required AAL2 pass and channel are valid. However, if the channel is valid, it informs the SSF / CCF 24 via the ACF 21 of the selected AAL2 pass / channel information. When the ACF 21 receives the call setup request from the SSF / CCF 24, if the place to be connected is the BSC 108, the channel AAL2 is set to the AAL2 signaling unit 25. The AAL2 signaling unit 25 is connected to the BSC 108. Select AAL2 path and channel from the routing table. After selecting AAL2 pass and channel information, AAL2 signal message is created and transmitted to BSC 108 through TP's AAL2 message transmission protocol. Notify SSF / CCF 24 via ACF 21 for the AAL2 path and channel selected from BSC 108. The SSF / CCF 24 receives a call setup request, AAL2 pass, and channel information from the originating side by the originating side, handles the call, and then sends a call request to the terminating side. The terminating side sends a call setup request signal to the ACF 21 after the call is handed and receives a selected AAL2 pass and channel information from the ACF 21 after a predetermined time and transmits an AAL2 connection setup request to the TIF 23. do. The TIF 10 receives a connection establishment and release command from the SSF / CCF 24 and transmits the command to the AAL2 connection controller 12 of the TP 10 and has connection information in response from the TP 10. The AL2 message transmission protocol unit 11 receives the AAL2 signaling message from the BSC 108 and transfers it to the AAL2 signaling unit 25 of the MIP 20, and conversely receives the message from the AAL2 signaling unit 25 to receive the BSC 108. To pass). The AAL2 connection controller 12 receives the AAL2 connection establishment and release request from the TIF 23 of the MIP 20 and controls the TP switch 13 or the interface module 14.

As described above, the present invention has the advantage of applying the AAL2 transmission scheme to the wireless mobile network switch to accommodate a large number of subscribers without physical line expansion, thereby improving channel usage efficiency and reducing investment costs due to the increase in subscribers.

Claims (3)

A transmission unit having a function of switching subscriber data and a protocol function of delivering a Layer 3 signaling message; Next-generation exchange system applied to the AL 2, characterized in that the intelligent control unit having a function to control the switching function of the transmission unit to receive a Layer3 message connected to the transmission unit and provide a variety of services. The method of claim 1, wherein the transmission unit, An AL2 message transmission protocol unit which receives an AAL2 signaling message from a BSC and delivers it to the AAL2 signaling unit of the intelligent management unit, and conversely receives a message from the AAL2 signaling unit and delivers the message to the BSC; Next-generation exchange system applying the AAL2, characterized in that consisting of the AAL2 connection control unit for controlling the TP switch or interface module by receiving the AAL2 connection establishment and release request from the TIF of the intelligent management unit. The method of claim 1, wherein the intelligent management unit, An ATM VCC responsible for disabling the AAL2 pass, Receives AAL2 pass information released from the ATM VCC, updates the routing table, receives the AAL2 signaling message from the transmitter, processes the AAL2 protocol, and receives a call setup request. An ACF requesting to set up a channel, selecting an AAL2 path and channel for the BSC to be connected from the routing table, and then creating an AAL2 signal message and transmitting the AAL2 signal to the BSC via the AAL2 message transmission protocol of the transmitter; SSF / CCF which receives call setup request, AAL2 pass and channel information from ACF, handles a call, sends a call request to called party, receives AAL2 pass and channel information selected from ACF, and requests AAL2 connection setup by TIF. , Next-generation exchange applied to ALS2, characterized by receiving a connection establishment and release command from the SSF / CCF and transmitting to the AAL2 connection controller of the transmission unit, and comprising a TIF having connection information on the response from the transmission unit. system.