A New Channel Accessing Scheme for Multi-hop Networks

Recently, multi-hop networks have obtained a growing interest in the applications in which the network needs to be deployed rapidly. In order to achieve high capacity packet transmission in wireless multi-hop networks, many medium access control (MAC) schemes have been proposed to maximize the system throughput. Besides, energy efficiency is a critical Issue since the battery power of the mobile terminals is limited in mobile multi-hop networks. In this paper, we introduce a new scheduling channel accessing control method for mobile multi-hop networks. In the method, the TDMA frame is divided into N time slots, and each node is assigned one transmission slot different from those of the other nodes in each frame. It allows a node utilize the slots pre-assigned to the other nodes dynamically with a range of values for accessing probability. And at the same time, transmitter-based code is assigned to the nodes for communications between them. We evaluate the performances of our proposed MAC method with the other scheduling schemes propose by Chalmtac, Ju and Olkonomou in view of system throughput. Numerical simulation results show that the method gives better throughput performance. Also, we analyze how the changing average degree in the network and accessing probability affect the energy consumption.