Research On Power Control Mechanism For Multi-channel MAC Protocol In Ad Hoc Network

Ad hoc networks are non-centered, multi-hop, self-organized, peer to peer networks in which mobile nodes cooperate to maintain network connectivity and perform routing functions. All nodes within the networks are equally distributed and can be both used as the host or serve as a router. These fast deployable, self-organizing networks are typically used in situations where network connectivity is temporarily needed or no fixed infrastructure network can be properly stalled. Due to their unique qualities, ad hoc networks have drawn much attention from the research of wireless communication.As the development of both software and hardware of wireless communication, wireless communication devices are becoming more popular than ever, causing the ever-increasing demand for channel bandwidth in wireless environments. Thus, introducing multi-channel technology into wireless ad hoc networks is particularly critical. Medium access control (MAC) protocol is one of the essential issues of ad hoc networks, which address how to utilize the radio spectrum efficiently and to resolve potential contention and collision. Due to problems such as multi-channel hidden terminal problem, a single-channel MAC protocol des not work well in a multi-channel environment. Therefore, more thought must be put in when it comes to the design of multi-channel ad hoc networks MAC protocol, which was discussed in length.Power control in ad hoc networks has recently received a lot of attention for two main reasons. First, power control is most crucial in multi-hop ad hoc networks where most of the nodes are being powered by batteries cells. Power control protocol improves the overall energy consumption, consequently prolonging the lifetime of the network. Second, power control has been shown to increase spatial channel reuse, hence increasing the overall channel utilization.This paper discussed the basic power control protocol of multi-channel ad hoc networks, and proposed a comprehensive solution for multi-channel power control MAC protocol in ad hoc networks. By adaptively adjusting the required transmission power for data packets and route request packets, the protocol allows for more interference-limited simultaneous transmissions to take place in the neighborhood of a receiving node via multi-channel. Simulation results indicate that the proposed protocol achieves a significant decrease in the total energy consumption while increase in the channel utilization and end to end network throughput.