Design and performance of a GPRS based mobile satellite system

Author

Ravishankar, C. ; Peri, S. ; Barnett, C.

Author_Institution

Hughes Network Syst. Inc., Germantown, MD, USA

Volume

6

fYear

2004

fDate

26-29 Sept. 2004

Firstpage

4032

Abstract

This paper describes the design and performance of a geo-synchronous mobile satellite system based on enhancements to terrestrial general packet radio service (GPRS). The system provides IP data services with a bidirectional throughput of approximately 144 kbps using transportable laptop sized terminals. The terrestrial GPRS standard was significantly enhanced to achieve better spectral efficiency and improved throughput for satellite operation that is characterized by long delays, spectral scarcity and limited link margins. Enhancements were primarily in the radio specific layers, namely physical layer and MAC/RLC layers, to achieve the necessary spectral efficiency and throughput improvement. The system implements a delay optimized bandwidth on demand (BoD/DAMA), dynamic link adaptation (DLA/DBRA), link layer ARQ, multiple levels of QoS, policy based resource management, load balancing and position based admission control and billing. It permits user mobility across spot-beams within the satellite system as well as between satellite system and terrestrial GPRS.

Keywords

IP networks; access protocols; automatic repeat request; channel allocation; mobile satellite communication; mobility management (mobile radio); packet radio networks; quality of service; telecommunication congestion control; 144 kbit/s; BoD/DAMA; DLA/DBRA; IP data services; MAC/RLC layers; QoS; bidirectional data throughput; delay optimized bandwidth on demand; dynamic link adaptation; geo-synchronous mobile satellite system; limited link margins; link layer ARQ; load balancing; physical layer; policy based resource management; position based admission control; position based billing; spectral efficiency; spectral scarcity; spot-beam user mobility; terrestrial GPRS; terrestrial general packet radio service; transportable laptop sized terminals; Automatic repeat request; Bandwidth; Board of Directors; Delay systems; Ground penetrating radar; Packet radio networks; Physical layer; Portable computers; Satellite broadcasting; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th

ISSN

1090-3038

Print_ISBN

0-7803-8521-7

Type

conf

DOI

10.1109/VETECF.2004.1404835

Filename

1404835