Authors : J. Premalatha , P. Balasubramanie and C. Venkatesh
Abstract: In mobile ad hoc wireless networks, multiple mobile stations communicate without the support of a centralized coordination station for the scheduling of transmissions. The dynamic nature of these mobile networks makes the support of quality of service challenging, because it is very difficult to maintain resource reservations. This study deals a combination of medium access control procedure employing distributed coordination function and suitable transport layer mechanism which improves QoS guarantee in Transport layer. IEEE 802.11e MAC employs a channel access function called the hybrid coordination function, which includes contention based channel access and a contention-free centrally controlled channel access mechanism. In the proposed method, IEEE802.11e and Additive Increase Multiplicative Decrease (AIMD) mechanism have been combined to analyze the quality of service in cross layer. The combined technique enhances the QoS parameters viz, throughput by 30-40% and decreases delay by 70-80% and packet loss by 30-40%.
J. Premalatha , P. Balasubramanie and C. Venkatesh , 2008. Cross Layer Design to Improve QoS in Ad Hoc Networks. Journal of Mobile Communication, 2: 52-58.