A hybrid access method in a multiple access channel

Zvi Rosberg

Research output: Contribution to journalArticlepeer-review


This paper considers a multiple-access communication channel with an infinite number of users. We show that if a controlled slotted Aloha protocol is used, then messages with variable length will have a negative impact on the average message delay. In order to alleviate this problem, a mixed mode (Hybrid) access method is suggested under which the channel bandwidth is split into two sub-channels, managed under different policies. Messages whose length is less than or equal to a critical value are transmitted in one sub-channel under a slotted Aloha policy. The rest of the messages are sent through a separate portion of the channel bandwidth, using a reservation protocol. We show that under this hybrid access method the average delay of a message is greatly improved.

Original languageEnglish
Pages (from-to)93-102
Number of pages10
JournalPerformance Evaluation
Issue number2
StatePublished - 1 Jan 1986
Externally publishedYes


  • Hybrid Channel
  • Message Delay
  • Mixed-Mode Protocol
  • Multiple-Access Channel
  • Reservation Protocol
  • Slotted Aloha

ASJC Scopus subject areas

  • Software
  • Modeling and Simulation
  • Hardware and Architecture
  • Computer Networks and Communications


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