Priority scheduling in mobile ad hoc networks with improved bandwidth utilization

Studies of ad hoc wireless networks are a relatively new field gaining more popularity for various new applications. In these networks, the Medium Access Control (MAC) protocols are responsible for coordinating the access from active nodes. These protocols are of significant importance since the wireless communication channel is inherently prone to errors and unique problems such as the hidden-terminal problem, the exposed-terminal problem, and signal fading effects. This scheme is to perform a priority scheduling in wireless ad-hoc networks, with full utilization of the bandwidth available, mitigating the loss of packets incurred by the mobility of the nodes in the network. Here, two narrow busy tone packets are used to indicate the notification of a transmission by a high priority node, thus resolving the contention of the channel. Courtesy Piggybacking scheme exploits the channel dynamics and its basic idea is to let the high priority traffic help the low priority traffic by sharing unused residual bandwidth with courtesy.