| Publisher | Institute of Electrical and Electronics Engineers | ||
|---|---|---|---|
| Format | 401.0KB PDF | Date added | 06 Jun 2003 |
| Topics | TDMA - CDMA, Mobile - Wireless Communications, TCP - IP | ||
| Downloads | 70 | ||
In TDMA-based MAC (media access control) protocols for satellite network access, slotted ALOHA which has been widely deployed in Very Small Aperture Terminal (VSAT) systems. More recently, Generalized Retransmission Announcement Protocol (GRAP) was proposed, which regroups the immediate access by contention at low loads and the reservation access at higher loads to achieve a better efficiency. Inspired by GRAP, a new MAC protocol (CA-GRAP) using cumulative acknowledgment (CA) technique is proposed to further improve the success probability of reservation request. Furthermore, the efficiency of random access in CA-GRAP is improved by introducing contention index. The impact of all these protocols on TCP traffic is investigated and an upper bound of TCP throughput at high loads is derived for GRAP-based protocols.
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