Hello message scheme enhancement in CRMANET

© 2016 IEEE. All these years, a lot of efforts have been put upon how to reduce the broadcast overhead consumption in Cognitive Radio enabled Mobile Ad hoc Network (CRMANET). In this work, we propose an improved hello message scheme named Adaptive Classified Hello Scheme (ACHS) adopting classification method in CRMANET. Different from fixed hello interval and content form in frequently used Periodic Hello Message Scheme (PHMS), ACHS categorizes nodes into different classes based on node mobility. Each class in ACHS will be configured with different hello intervals and content format. Given each nodes real-time function performing in CRMANET (on the route or off the route), ACHS employs different strategies. For instance, when nodes are performing data transmission, instead of sending dedicate hello messages, their hello information will be attached into the data message to further reduce the control overhead. Compared with Periodic Hello Message Scheme (PHMS) and Reactive Hello Protocol (RHMS) in simulation, ACHS has improved hello efficiency around 50%