Browse Prior Art Database

BANDWIDTH SAVINGS IN INTER-MSC LINKS VIA STATISTICAL MULTIPLEXING

IP.com Disclosure Number: IPCOM000009161D
Original Publication Date: 1999-Jun-01
Included in the Prior Art Database: 2002-Aug-12
Document File: 2 page(s) / 125K

Publishing Venue

Motorola

Related People

Authors:
Steve Aftelak Rob Davies Graham Johnson

Abstract

Currently, the European Telecommunications Standards Institute (ETSI) is working on creating a standard for Tandem Free Operation (TFO) for the European 2nd Generation Public Cellular mobile Communications system, GSM. This will signifi- cantly improve the quality of calls placed between 2 GSM mobiles by avoiding transcoding of speech in the network. This contrasts with the current practice where the network decodes encoded speech received from a mobile, only to re-encode it before sending it to the 2nd mobile. The implementation of TFO means that encoded speech is transported within the fixed part (core) of the GSM network, and it is this fact which facilitates the invention which is described. Initially the state of the art is described, in the context of TFO.