English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

This paper studies the performance of Non-persistent CSMA/CA protocols withK-Exponential Backoff scheduling algorithms. A multi-queue single-server systemis proposed to model multiple access networks. The input buffer of each accessnode is modeled as a Geo/G/1 queue, and the service time distribution ofhead-of-line packets is derived from the Markov chain of underlying schedulingalgorithm. The main results include the complete analysis of the throughput anddelay distribution, from which we obtained stable regions with respect to thethroughput and bounded mean delay of the Geometric Retransmission andExponential Backoff schemes. We show that the throughput stable region ofGeometric Retransmission will vanish as the number of nodes n \rightarrow\infty; thus, it is inherently unstable for large n. In contrast to GeometricRetransmission, the throughput stable region of Exponential Backoff can beobtained for an infinite population. We found that the bounded mean delayregion of Geometric Retransmission remains the same as its throughput stableregion. Besides, the variance of service time of Exponential Backoff can beunbounded due to the capture effect; thus, its bounded delay region is only asub-set of its throughput stable region. Analytical results presented in thispaper are all verified by simulation.

Analysis of Non-Persistent CSMA Protocols with Exponential Backoff Scheduling