KR100362575B1 - Tester for asynchronous transfer mode switch of base station subsystem - Google Patents

Abstract

An apparatus for testing a base station apparatus asynchronous transmission mode switch of a mobile communication system, the apparatus comprising: a base station apparatus asynchronous transmission mode switch; An asynchronous transmission mode switch fabric, a plurality of asynchronous transmission mode cell multiplexing and demultiplexers connected to each of the first ports of the switch fabric, an asynchronous transmission mode cell optical signal processing connected to each of the second ports of the switch fabric, and And a plurality of asynchronous transmission mode cell multiplexers and demultiplexers connected to an asynchronous transmission mode cell tester through a UTOPIA interface, wherein the asynchronous transmission mode cell tester is based on a user's asynchronous transmission mode cell test command. Determine at least an asynchronous transmission mode path, traffic type, and bandwidth, and transmit a test frame to the cell multiplexer and demultiplexer via a UTOPIA interface, and transmit a frame received from the cell multiplexer and demultiplexer to a virtual path identifier and a virtual channel identifier. Asynchronous transmission mode traffic type Assemble and analyze the test results.

Description

Base station device asynchronous transfer mode switch test device {TESTER FOR ASYNCHRONOUS TRANSFER MODE SWITCH OF BASE STATION SUBSYSTEM}

The present invention relates to a mobile communication system, and more particularly, to an apparatus for testing an Asynchronous Transfer Mode (ATM) switch of a base station subsystem (hereinafter, referred to as "BSS").

Typically, the BSS of a mobile communication system collectively refers to a base station controller (BSC) and a base station transceiver subsystem (BTS). The BSC performs a radio link control and a handoff function, and the BTS performs a function of configuring a wireless communication path and managing a radio resource with a mobile terminal.

BSS typically implements IPC (Inter Process Communication) using a bus type High Capacity IPC Processor Assembly (HINA) structure. However, as the mobile communication system is implemented to provide not only voice but also 3G (3rd generation) mobile communication capable of transmitting high-speed data, for example, CDMA2000 and UMTS (Universal Mobile Telecommunication System) services, the IPC network load of the BSS increases and There is a limit to using the HSS structure BSS as it is. As 3G mobile communication provides services such as high quality voice, moving picture, and internet search, the increase of IPC network load and data service in BSS is natural.

In order to overcome this limitation, 3G (3rd Generation) mobile communication system has used IPC network structure using ATM switch for BSS. Hereinafter, the ATM switch used for BSS is called "BSS ATM switch."

In order to evaluate the ATM path check and performance of the BSS ATM switch in the 3G mobile communication system, a test apparatus capable of generating an ATM cell is required.

1 is a block diagram of an apparatus for testing a BSS ATM switch according to the prior art. In the prior art, the ATM cell generator 6, which is an external device and generates an ATM cell, is used to test the BSS ATM switch 2. The external device ATM cell generator 6 and the BSS ATM switch 2 are connected by a STM-1 (Synchronous Transport Module level 1) optical fiber. The BSS ATM switch 2 is also connected to a plurality of internal processors 4. The BSS ATM switch 2 and the internal processors 4 are connected by UTOPIA (Universal Test Operations Physical layer Interface for ATM).

As described above, in the prior art for testing a BSS ATM switch, it is possible to use external equipment, and during the operation of the BSS ATM switch, the ATM switch check and the ATM path check cannot be performed.

Accordingly, an object of the present invention is to provide a BSS ATM switch test apparatus capable of periodically checking an ATM path and monitoring its state in real time even during operation of a BSS ATM switch.

Another object of the present invention is to provide an ATM switch test apparatus capable of verifying ATM related tests in a BSS ATM switch without additional equipment.

According to the above object, the present invention provides an apparatus for testing a base station apparatus asynchronous transmission mode switch of a mobile communication system:

The base station apparatus asynchronous transmission mode switch; An asynchronous transmission mode switch fabric, a plurality of asynchronous transmission mode cell multiplexing and demultiplexers connected to each of the first ports of the switch fabric, an asynchronous transmission mode cell optical signal processing connected to each of the second ports of the switch fabric, and With transmitters,

An asynchronous transfer mode cell tester is connected to the plurality of asynchronous transfer mode cell multiplexers and demultiplexers through a UTOPIA interface,

The asynchronous transmission mode cell tester determines at least an asynchronous transmission mode path, traffic type, and bandwidth based on a user's asynchronous transmission mode cell test command, and transmits a test frame to the cell multiplexer and demultiplexer through a UTOPIA interface, The frame received from the cell multiplexer and the demultiplexer is assembled to an asynchronous transmission mode traffic type using a virtual path identifier and a virtual channel identifier and characterized in that the test results are analyzed.

1 is a block diagram of an apparatus for testing a BSS ATM switch according to the prior art;

FIG. 2 is an example configuration diagram illustrating a structure of a TAN / GAN / BAN (Tandom Access Network / General Access Network / BSC Access Network) in a 3G mobile communication system BSS;

3 is a block diagram of an apparatus for testing a BSS ATM switch according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

FIG. 2 is an example configuration diagram illustrating a structure of a TAN / GAN / BAN (Tandom Access Network / General Access Network / BSC Access Network) in a 3G mobile communication system BSS. A plurality of General Access Networks (GANs) are connected to the E1 line in one TAN (Tandom Access Network), and each of the General Access Networks (GAN # 0-GAN # n) includes, for example, 12 BANs (BSCs). Access Networks) BAN # 0-BAN # 11 are connected to the STM-1 line, and for example, 64 BTSs BTS # 0-BTS # 63 are connected to each of the 12 BANs.

FIG. 3 is a block diagram of an apparatus for testing an ATM switch of the TAN / GAN / BAN structure BSS shown in FIG. 2.

The BSS ATM switch 2 plays a switching role in each of the TAN, the GAN, and the BAN of FIG. 2. The BSS ATM switch 2 is an ATM Switch Fabric Assembly (ASFA) 16 and four ACMAs (ATM Cell Mux / Demux Assembly) connected to the input ports of the ASFA 16 through an Inter Module Interface (IMI) ( 10-0, .., 10-3). Each of the four ACMAs (ATM Cell Mux / Demux Assembly) 10-0, .., 10-3 performs ATM cell multiplexing and demultiplexing. The BSS ATM switch 2 may include, for example, eight AS1A (ATM STM-1 Assemblies) 12-0, 12, and 7-7 connected to each of the output ports of the ASFA 16, and the AS1As ( 12-0, .., 12-7) includes optical transmission assemblies (OT1As) 14-0,. Each of the OT1As 14-0,... 14-7 is connected to the outside via the STM-1 line. Eight ATM STM-1 Assemblies (12-1, 12-7) and Optical Transmission Assemblies (OT1A) 14-0, (14-7) are used for ATM cell optical signal processing and It serves to transmit. As shown in FIG. 3, each component of the BSS ATM switch 2 is redundant.

Each of the four ACMAs (10-0, .., 10-3) in the BSS ATM switch 2 is connected to a TAN / GAP / BAP (Tandom Access Processor / General Access Processor / BSC Access Processor) through UTOPIA. In FIG. 3, the TAN / GAP / BAP 18 is representatively showing that the ACMA 10-0 is connected through UTOPIA. The TAP / GAP / BAP 18 becomes TAP when the BSS ATM switch 2 is in the TAN, and becomes GAP when the BSS ATM switch 2 is in the GAN. If the BSS ATM switch 2 is in the BAN, the BAP becomes BAP. The TAP / GAP / BAP 18 is connected to a hardware alarm gathering board (HAB) 20. In FIG. 3, it is responsible for generating a clock to be provided to the BSS ATM switch 2 as an NSB (Network Synchronization Board) 22.

One port of the ASFA (ATM Switch) 16 of FIG. 3 used for TAN, GAN and BAN in a 3G telecommunications system supports up to 4,096 connections, but this test does not support external additional equipment such as prior art. It is not possible to construct a test environment using It is not possible to verify the test results due to capacity issues of the equipment under test.

In the embodiment of the present invention, as shown in FIG. 2, the ATM cell tester 24 is connected to the BSS ATM switch 2 through UTOPIA. More specifically, the ATM cell tester 24 is connected to one of the ACMAs of the BSS ATM switch 2 via UTOPIA.

The ATM cell tester 24 uses hardware that supports the UTOPIA interface, and its function is as follows. Since the TAP / GAP / BAP 18 in FIG. 3 also supports the UTOPIA interface, the ATM cell tester 24 can be used without changing hardware used by the TAP / GAP / BAP 18.

The function of the ATM cell tester 24 according to the embodiment of the present invention is as follows.

AAL 1, AAL 2 and AAL 5 payload generation

Periodic ATM route checking and reporting

ATM Forum UNI 4.0 based ATM signaling

Soft-Permanent Virtual Channel (PVC) capability

PVC (Permanent Virtual Connection) function

ATM OAM (Operation, Administration and Maintenance)

-Real-time monitoring function through linkage with BSM (Base Station Manager)

And for testing the BSS ATM switch, the ATM cell tester 24 communicates with one of the ACMAs 10-0,... 10-3 via UTOPIA (eg, the ACMA 10-1 as shown in FIG. 3). When connected, the ACMA 10-1 performs the following function.

-Create a routing tag for self-routing

ATM cell generation and decomposition

Support for up to 4,096 ATM connections

Hereinafter, an operation for BSS ATM switch test according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

To test the BSS ATM switch, the user connects the ATM cell tester 24 to one of the ACMAs of the BSS ATM switch 2 and issues a test run command using a debug terminal connected to the ATM cell tester 24. Get off. Accordingly, the factors determined by the ATM cell tester 24 are as follows.

Permanent Virtual Connection (PVC) or Switched Virtual Connection (SVC)

-Determination of Traffic Type (AAL type 1, AAL type 2, AAL type 5)

Bandwidth determination (1-350000 cells per second)

Cell Priority Determination (High / Low)

Using the debug terminal, the ATM cell tester 24 determines the ATM path, traffic type, bandwidth, etc. at the request of the user, and the test frame is transmitted to the ACMA 10-1 through the UTOPIA interface. Accordingly, the ACMA 10-1 performs the following operation.

-Assembly of routing tag to destination for self-routing

-ATM cell header assembly (5 bytes)

ATM cell assembly (53 bytes)

-ATM connection creation (up to 4,096 connections)

-Function for self loop test

The test environment and the path are established by the function of the ACMA 10-1 so that the ATM cell is transmitted and received by the ACMA 10-1 again through the ASFA 16 of FIG. The ACMA 10-1 transfers the frame to the ATM cell tester 24 as follows.

Check that the routing tag is yours, and discard it if it's not yours.

-Check that the VPI / VCI value in the ATM cell header is a connection registered to it, and discard it if it is not its own.

The ATM information field (48 bytes), that is, the ATM payload is transmitted to the ATM cell tester 24 through the UTOPIA interface.

The frame arriving at the ATM cell tester 24 is assembled into an ATM traffic type through the following process performed by the ATM cell tester 24.

-Check whether the traffic type is AAL 1, AAL 2, AAL 5. In the case of SVC, the end-to-end negotiated traffic type is known, but in the case of soft-PVC and PVC, the traffic type is unknown. Distinguish its form.

Analyze the received frame.

The ATM cell tester 24 analyzes the result from the received frame and passes the result to a debug terminal so that the user can know the result of the analysis through a display. ATM cell tester 24 also transmits the information to the BSM.

By using the BSS ATM switch test apparatus according to the embodiment of the present invention as described above, it is possible to check the ATM path periodically even during the operation of the BSS ATM switch, monitor its status in real time, and always perform the following without additional equipment. ATM related tests can be verified.

1) ATM switch capacity test

2) ATM Route Check

3) ATM maximum connection test

4) Simultaneous testing of TAN, GAN and BAN

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be determined by the equivalent of claims and claims.

As described above, the present invention can periodically check the ATM route even during operation, monitor the state in real time, and verify ATM related tests without additional equipment. In addition, the present invention has the advantage that it is not necessary to have an expensive ATM cell generator for the ATM switch test.

Claims (3)

Apparatus for testing a base station apparatus asynchronous transmission mode switch of a mobile communication system: The base station apparatus asynchronous transmission mode switch; An asynchronous transmission mode switch fabric, a plurality of asynchronous transmission mode cell multiplexing and demultiplexers connected to each of the first ports of the switch fabric, an asynchronous transmission mode cell optical signal processing connected to each of the second ports of the switch fabric, and With transmitters, An asynchronous transfer mode cell tester is connected to the plurality of asynchronous transfer mode cell multiplexers and demultiplexers through a UTOPIA interface, The asynchronous transmission mode cell tester determines at least an asynchronous transmission mode path, traffic type, and bandwidth based on a user's asynchronous transmission mode cell test command, and transmits a test frame to the cell multiplexer and demultiplexer through a UTOPIA interface, And assembling the frame received from the cell multiplexer and the demultiplexer into an asynchronous transmission mode traffic type using a virtual path identifier and a virtual channel identifier and analyzing a test result. The asynchronous transmission mode switch test apparatus according to claim 1, wherein the asynchronous transmission mode cell tester also performs cell priority determination. The method of claim 1, wherein the asynchronous transmission mode cell multiplexer and demultiplexer, When a test frame is received from the asynchronous transmission mode cell tester, routing tag assembly to the destination for self-routing, asynchronous transmission mode cell header assembly, asynchronous transmission mode cell assembly, asynchronous transmission mode connection generation, and a function of self loop test Perform at least one, When the frame is received from the switch fabric, the base station apparatus characterized in that the routing tag check, the connection check of the frame to perform the information related to the asynchronous transmission mode cell tester and transmits the information to the asynchronous transmission mode cell tester through the UTOPIA interface. Asynchronous transfer mode switch tester.