Low resolution grid mapping approach for geographic routing Online publication date: Thu, 28-Nov-2013
by Colin Lemmon; Siu Man Lui; Ickjai Lee
International Journal of Mobile Communications (IJMC), Vol. 11, No. 6, 2013
Abstract: Handling local minima in geographical routing is of great importance since it is a core component in geographic forwarding processes. This paper proposes a new low-resolution grid occupancy mapping (GOM) approach to effectively handle local minima for existing geographic routing protocols. The proposed approach seeks to discover and distribute a low-resolution map containing anomalies in the coverage areas where potential local minima exist. This approach minimises overhead while maintaining minimal global knowledge to effectively route around local minima. Experimental results demonstrate significantly lower probe bandwidth and memory requirements in comparison to the previously proposed boundary mapping protocol (BMP) at the cost of an increase in hello message size. The proposed approach is well suited for scalable and dynamic mobile networks due to the reduction in probe and memory overhead and cellular structure. Future research includes improvements to the boundary detection algorithm and integration into existing geographic routing protocols.
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