Making SAHN-MAC Independent of Single Frequency Channel and Omnidirectional Antennas

Provision for quality of service (QoS) for real-time traffic in multi-hop ad-hoc wireless networks with shared medium and a contention based media access control (MAC) pro-tocol is very challenging. In our previous work we have explained the challenges in detail and provided a solution within the context of suburban ad-hoc networks (SAHN). A SAHN is a multi-hop ad-hoc network that aims to provide suburban area connectivity at broadband speed with a low initial cost and zero service charges. The solution is based on an analytical model that uses the channel access mecha-nism of IEEE 802.11e. The admission control mechanism of SAHN-MAC prevents any new data stream from initiat-ing if the new stream saturates or is about to saturate any part of the network. The bandwidth reservation scheme is necessary for the admission control scheme to work prop-erly. In this paper we extend our previous work to make SAHN-MAC independent of single frequency channel and omnidirectional antenna. The improvements have been evaluated via simulations