ALOHA WITH MULTIPACKET MESSAGES AND ARQ-TYPE RETRANSMISSION PROTOCOLS.

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Abstract

The throughput of slotted ALOHA systems with multipacket message transmissions is evaluated. The conventional strategy of retransmitting the entire message when collisions occur results in a reduction in throughput when compared with the single packet case. However, it is demonstrated that the use of ARQ-type retransmission protocols can provide significant performance improvement. In particular, a simple go-back-N (GBN) protocol is shown to offer a modest throughput increase, while a selective reject (SREJ) strategy provides exactly the same throughput as a single packet slotted ALOHA system, irrespective of message length statistics. These results motivate a new scheme (referred to as unslotted ALOHA with selective retransmission, ALOHA/SR) for increasing the throughput of unslotted random access channels.

Original languageEnglish (US)
Pages (from-to)1365-1370
Number of pages6
JournalConference Record - International Conference on Communications
Volume3
StatePublished - 1983
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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