An Effective Congestion Avoidance Altering Routing Protocol in Sensor Networks

Congestion avoid in wireless sensor networks is a critical issue, it will not only affect transmission reliability, and will waste valuable energy resources. In order to reduce the wireless sensor network routing instability, we proposed a novel altering routing congestion control protocol for wireless sensor networks (CAAR). In this paper, we develop: 1) based on cognition detection technology to detect the potential congestion timely and effective; 2) once congestion happens inevitably, CAAR is presented to reallocate traffic with altering route protocol to mitigate congestion, avoid conflict, enhances data transmission reliability of CH; 3) congestion data local preservation strategies, it effectively avoid data lost during the congestion period and guarantee the reliability of data transmission; and 4) the altering routing protocol also provides a network load balancing, effective prolongs the life cycle of the clusters, postpones network system lifetime.