GSM – The Story Goes On
Jörg Eberspächer, Hans-Jörg Vögel, Christian Bettstetter · 2001
This chapter covers latest GSM technologies and services that have been introduced in Phase 2+. Moreover, an outlook to UMTS is given. Globalization: roaming and multiband systems Overview of services in Phase 2+ Improved codecs for speech services: Half-rate codec, enhanced full-rate (EFR) codec, adaptive multi-rate (AMR) codec Speech services for group communication: advanced speech call items (ASCI), voice broadcast service (VBS), voice group call service (VGCS), eMLPP Data services and higher data rates: High Speed Circuit Switched Data (HSCSD), GPRS; and Enhanced Data Rates for GSM Evolution (EDGE) Supplementary services for speech Location services Service platforms: CAMEL, SIM application toolkit, MExE Wireless Application Protocol (WAP): Wireless Markup Language (WML), protocol architecture, system architecture, services and applications Beyond GSM: On the road to UMTS