Improving QoS for Voice Flow under Bursty Traffic in IEEE 802.11E

Volume 8 Issue 1 April - June 2019

Research Paper

Improving QoS for Voice Flow under Bursty Traffic in IEEE 802.11E

C. Ramakristanaiah* , P. Chenna Reddy **, R. Praveen Sam ***

* Department of Computer Science and Engineering, Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, India.

** Department of Computer Science and Engineering, Jawaharlal Nehru Technological University, Anantapur, India.

*** Department of Computer Science and Engineering, G. Pulla Reddy Engineering College, Kurnool, Andhra Pradesh, India.

Ramakristanaiah , C., Reddy, P., S., & Sam, R., P. (2019). Improving QoS for Voice Flow under Bursty Traffic in IEEE 802.11E.i-manager’s Journal on Wireless Communication Networks , 8(1),17-23. https://doi.org/10.26634/jwcn.8.1.16253

Abstract

In Saturated conditions burst data can be generated for voice queue. IEEE 802.11e is not supported a large amount of burst transmission for any AC. IEEE 802.11e EDCA parameter set enables the Voice traffic to send several packets per one transmission opportunity (TXOP). If the network is saturated with all type of flows, it takes several TXOPs to complete transmission of all generated packets and this takes more time. Voice flow access the channel more times but to serve all generated packets, voice Access category (AC) needs more TXOPs. It indirectly affects the channel winning probability of other Queues. In this paper, a channel accessing method for Voice queue is proposed. If more voice packets has been generated for voice AC, the queue length will be increased. This length reaches ideal queue length, then adaptive channel access mechanism invoked. This method suspends the backoff procedure and take the channel unconditionally. So that bakoff time will be reused as TXOP instead of waiting. This method enables the voice access category to transmit more packets with in single TXOP. The simulations are conducted and results are analyzed. The results show that 91% of voice flow even at 512 Kbps has been sent over the network.