Title :
An adaptive MAC layer protocol for ATM-based LEO satellite networks
Author :
Emmelmann, Marc ; Bischl, Hermann
Author_Institution :
Competence Center for Adv. Network Technol., Fraunhofer-Inst. FOKUS, Berlin, Germany
Abstract :
German aerospace center (DLR), Fraunhofer FOKUS.cats, and Tesat-Spacecom have designed a future multimedia ATM-based LEO satellite network. Part of the development was an adaptive MAC and FEC scheme which is presented in this paper. The FEC implementation switches on the fly during a connection between several FEC and modulation modes to guarantee a maximum ATM cell error rate of 10-6. In order to prevent influences of the changing FEC scheme on the user-level data rate, the MAC dynamically changes its packet lengths. Additionally, to minimize contention on the up-link, the MAC structures its TDMA frame into a fixed assigned part and a contention specific part. The boarder in between the two is dynamically altered according to the current link utilization.
Keywords :
access protocols; aerospace; asynchronous transfer mode; error statistics; forward error correction; multimedia communication; packet switching; satellite communication; telecommunication links; time division multiple access; ATM cell error rate; ATM-based LEO satellite networks; FEC scheme; Fraunhofer FOKUS.cats; German aerospace center; TDMA frame; Tesat-Spacecom; adaptive MAC layer protocol; link utilization; modulation modes; multimedia network; packet lengths; Artificial satellites; Asynchronous transfer mode; Digital video broadcasting; Error analysis; Forward error correction; Low earth orbit satellites; Media Access Protocol; Quality of service; Rain; Satellite broadcasting;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1286054
