Browse Prior Art Database

AUTOMATIC VOICE TRUNK TESTING WITHIN THE BASE STATION CONTROLLER

IP.com Disclosure Number: IPCOM000007561D
Original Publication Date: 1995-Nov-01
Included in the Prior Art Database: 2002-Apr-05
Document File: 4 page(s) / 130K

Publishing Venue

Motorola

Related People

M. Palat: AUTHOR [+4]

Abstract

The Enhanced Specialized Mobile Radio (ESMR) network integrates 5 different services- dispatch, interconnect, roaming, message alert pag- ing and high speed data communications into one seamless network, and allows subscribers to access any of these services from a single unit. The ESMR network is comprised of several entities-the Base Station Controller (BSC), the Enhanced Base Trans- ceiver System (EBTS), the Operations and Mainte- nance Center (OMC), the Mobile Switching Center (MSC) and the Mobile Stations (MS).

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MOTOROLA Technical Developments

AUTOMATIC VOICE TRUNK TESTING WITHIN THE BASE STATION CONTROLLER

by G. Levendel, M. Palat, H. Kashef and B. Stinton

  The Enhanced Specialized Mobile Radio (ESMR) network integrates 5 different services- dispatch, interconnect, roaming, message alert pag- ing and high speed data communications into one seamless network, and allows subscribers to access any of these services from a single unit. The ESMR network is comprised of several entities-the Base Station Controller (BSC), the Enhanced Base Trans- ceiver System (EBTS), the Operations and Mainte- nance Center (OMC), the Mobile Switching Center (MSC) and the Mobile Stations (MS).

  In the ESMR network, PCM voice trunk cir- cuits are defined between the BSC and the MSC. These circuits carry voice traffic received from the mobile station (via the EBTS) onto the MSC or vice versa. It is imperative that the voice trunks between the MSC and the BSC be hmctioning correctly at all times, on a live ESMR network. It is therefore advisable to audit the sanity of each individual cir- cuit at regular intervals. Prior art required voice traf- fic to be sent out on individual trunks and monitored on the Tl line carrying the trunk using appropriate analyzers, From this, determination can be made about the operational state of the voice trunk. This procedure has several drawbacks, including (a) requires the BSC-MSC network link to be fully oper- ational for testing, (b) requires the BSC to send out voice traffic to the MSC on each voice trunk, (c) requires user intervention to conduct the tests and collect data (d) has no post-fault detection processing such as fault recovery or faulty circuit isolation, and
(e) is very user intensive.

  This invention allows all voice circuits originat- ing or terminating in a BSC to be tested on a stand- alone BSC without the use of a dedicated DSO to the MSC. This invention uses the principle of loopback testing with voice compression to achieve this. The test is concentrated on the key component of the voice trunk-the Voice Processor c...