On higher layer protocol performance in CDMA S-ALOHA networks with packet combining in Rayleigh fading channels

TitleOn higher layer protocol performance in CDMA S-ALOHA networks with packet combining in Rayleigh fading channels
Publication TypeConference Paper
Year of Publication2000
AuthorsHossain, E., and V. K. Bhargava
Conference NameGlobal Telecommunications Conference, 2000. GLOBECOM '00. IEEE
Pagination42 -47 vol.1
Keywordsaccess protocols, CDMA S-ALOHA networks, code division multiple access, frequency selective Rayleigh fading, higher layer protocol performance, medium access control, multipath channels, multipath fading, packet radio networks, physical layer design, physical layer parameters, radio link control, Rayleigh channels, Rayleigh fading channels, reliable data transmission, reliable transport protocol, retransmission diversity packet combining, RLC/MAC layer access control, system performance, throughput, transport layer protocol, transport layer timer control, transport protocols, two-level error recovery

The performance implications of retransmission diversity packet combining on the RLC (radio link control)/MAC (medium access control) layer and transport layer protocol performance are investigated for three different heuristic-based RLC/MAC layer access control schemes in a CDMA S-ALOHA network under frequency selective Rayleigh fading. The transport layer protocol implements a two-level error recovery mechanism for reliable data transmission. Two different transport layer timer control mechanisms are considered. Implications of some physical layer parameters on system performance are discussed. It is observed that, for two-level error recovery through a reliable transport protocol, the achieved throughput depends on the transport protocol timer control mechanism and a suitable mechanism can be identified for an underlying RLC/MAC layer access control scheme and a particular physical layer design


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