Efficient Energe-Saved MAC Protocol for Wireless Sensor Networks
Chaosheng Feng · Microelectronics & Computer · 2011
Aiming at the functions and requirements of the MAC protocols in Wireless Sensor Networks,this paper proposes an improved MAC protocol based on CDMA.According to the changes of network traffic,listen/sleep mechanism keeped most nodes in sleeping to save energy.And combined the technology of CDMA,the nodes used the high-speed pseudo-random code(PN) with the characteristics of uniqueness in network and orthogonality to modulate data signals,which can be overlapped in time and frequency,to achieve transmission in large-scale and real-time.Simulation results show that the protocol not only maintain lower system delay and higher throughput,but also reduce energy consumption obviously.