Better Quality of Services (QoS) scrutiny of MAC protocols in wireless connections

Abstract

In wireless Media Access Control (MAC) environment, management of channel access and controlling of packet transmission is done via shared channel in a distributed way. MAC protocols objectives for Wireless Network is to maximize channel utilization and minimizing channel access delay. It is MAC protocol's responsibility to provide best possible utilization of provided bandwidth while fulfilling the Quality of Service (QoS) requirements of real time information. Real-time services have need of a quality with minimum packet loss and minimum delay. Time Division Multiple Access (TDMA) of MAC protocol accesses the channel for shared medium network. Signal is divided into different time slots and multiple users are authorized to use the same frequency channel. Carrier Sense Multiple Access (CSMA) is also a Media Access Control (MAC) protocol in which a node confirms the non-presence of other traffic before transmitting on a shared transmission medium. In this paper, different scenarios with various data packet sizes with nodes increment are used in the context of evaluation of TDMA and CSMA/CA Media Access Control (MAC) Protocols for Wireless Networks. Results in different scenarios show that CSMA/CA has lower delay for sending low and high volume of information with slight compromise with stability. TDMA has stability with high delay in comparison to CSMA/CA. Therefore in the future era, when large volume of information will need to send and nodes will be increasing exponentially; then this will be one of the major challenge to provide better Quality of Services to the users and maximum utilization of available resources.