PriMera Scientific Engineering (ISSN: 2834-2550)

PhD Thesis

Volume 5 Issue 5

Priority Scheduling Schemes in Mobile Ad-Hoc Networks

Mukakanya Abel Muwumba*

November 01, 2024

DOI : 10.56831/PSEN-05-164

Abstract

Delay is a major Quality of Service (QoS) metric in mission critical applications. Some applications run on Mobile Ad-Hoc Network (MANET) set ups which comes with transmission challenges arising from the size of traffic packets and environmental conditions. These challenges cause transmission delays, packet loss and hence a degraded network performance. This study investigated the performance of: Earliest Deadline First (EDF); Low Latency Queueing (LLQ) and Weighted Round Robin (WRR) scheduling algorithms in MANETs.

Firstly, the study investigated the Abhaya pre-emptive EDF scheduler. The study improved and adopted EDF algorithm to the MANETs environment, and formulated the Enhanced Earliest Deadline First-I and II (EEDF-I & EEDF-II) algorithms respectively. The numerical results showed that the EEDF-II model shortened the waiting times of packets of the different queues at various system loads compared with the EEDF-I model.

Secondly, the study adopted and improved the existing model to LLQ algorithm in the M/G/1 queue system. The numerical results revealed that the proposed algorithm performed better than the adopted in transmitting video packets. The study extended further the proposed LLQ algorithm to formulate the Extended Low Latency Queuing algorithm (ELLQ). The numerical results revealed that the video packets experienced the least conditional mean response time/slowdown; followed by voice packets and lastly text packets.

Thirdly, the study enhanced and studied the Existing (EWRR) service strategy; and then proposed an Improved (IWRR) model in the M/G/1 queue system under varying workloads distributions. The numerical results showed that video packets performed poorly compared to voice packets in the EWRR algorithm.

In conclusion, we studied three algorithms namely: EDF, LLQ & WRR, and proposed three novel variants i.e., EEDF-II, ELLQ plus IWRR for MANETs.

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