Performance Comparison and Analysis of Wireless Communication Network based on MAC Protocols

In wireless networks, MAC protocols determines the use of wireless channels, which is used to allocate limited communication resources among nodes. In traditional networks, nodes can continuously obtain energy. Sometimes they can be supplied at any time when they are interrupted, and the topology of the network is relatively stable. Hence the researches on MAC protocols are generally carried out in the ideal state and focus on the performance of data transmission to improve the utilization of bandwidth and increase the real-time performance of the network. However, in some specific networks, the energy of nodes is limited and the network topology is dynamic. It can be seen that the differences of network structure make it necessary to design suitable MAC protocols to control the transmission process of data. This paper mainly introduces the back-off algorithm of the MAC layer protocols in the ideal state, and makes some comparative analyses between the binary exponential back-off algorithm and the related improved mechanisms. Then it introduces the S-MAC protocols for wireless sensor networks and the methods of calculating the throughput, delay and energy loss of the network. Finally the conclusions are drawn from the analyses of the network performance based on the main factors that affect the networks.