Avoidance of Starvation of BE and BK Access Categories in 802.11e
C. Ramakristanaiah1, P. Chenna Reddy2, R. Praveen Sam3
1C. Ramakristanaiah, Research Scholar, Department of CSE, JNTUK Kakinada (Andhra Pradesh), India.
2P. Chenna Reddy, Professor, Department of CSE, JNTUA University, Anantapur (Andhra Pradesh), India.
3R. Praveen Sam, Professor, Department of CSE, G.Pulla Reddy Engineering College, Kurnool (Andhra Pradesh), India.
Manuscript received on 01 May 2019 | Revised Manuscript received on 15 May 2019 | Manuscript published on 30 May 2019 | PP: 2433-2443 | Volume-8 Issue-7, May 2019 | Retrieval Number: G5523058719/19©BEIESP
Open Access | Ethics and Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In saturated conditions of IEEE 802.11e network, for every backoff instance, backoff counter reaches zero fast for voice and video Access Categories (ACs) and starts their transmission. Best Effort (BE), Background (BK) backoff procedures are interrupted frequently. Channel must be free to resume its backoff procedure but it is engaged by voice and Video ACs. The ACs BE and BK are denied the services of 802.11e for a long duration. This leads to starvation of BE and BK. Since these traffics are involved in the applications like browsing, texting and background services they should not be starved. This paper propose a method which makes BE and BK are been preferably served. The method evaluates the arrival rate and service rate for video, and BE Acs. If The number of packets arriving at video AC is greater t han the number packets being served by video AC, then both arrival rate service rates are balanced by improving the service rate i.e should meet the atrrival flow of video AC. Service rate is depended on transmission opportunity (TXOP) limit which is the duration of transmission of AC. The extensive analysis and simulations are conducted using ns2.35 with EDCA patched. The simulation results show that almost 74% of BE and BK packets are transmitted so that the starvation is avoided.
Keyword: 802.11e, EDCA, Access Category, Starvation, Arrival Rate, Service Rate, TXOP, QoS.
Scope of the Article: Optical and High-Speed Access Networks