FIRST/LAST ACCESS PROTOCOL.

Mark J. Karol, Stuart C. Schwartz

Research output: Contribution to conferencePaperpeer-review

Abstract

When a random access protocol is used to share a communications channel, conflicts arising from simultaneous transmissions must be resolved. Listening to feedback on a broadcast channel, and using knowledge of round trip propagation delays, the First/Last Access Protocol (FLAP) reserves time for retransmissions of the 'first' and 'last' packets involved in a channel collision. Time slots of duration greater than packet transmission time exploit the advantages of both slotted and unslotted access protocols. The maximum achievable system throughput is 0. 673, and the throughput approaches an asymptotic value of 0. 667 as the input rate increases. Extensions of FLAP yield system throughputs greater than 0. 80.

Original languageEnglish
Pages233-237
Number of pages5
StatePublished - 1985

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