|Authors||T. Elhourani, S. Ramasubramanian and A. Kvalbein|
|Editors||F. T. e. al.|
|Title||Enhancing Shortest Path Routing for Resilience and Load Balancing|
|Afilliation||, Communication Systems|
|Publication Type||Proceedings, refereed|
|Year of Publication||2011|
|Conference Name||Proceedings, International Conference on Communications 2011|
This paper develops a new resilient multipath routing technique, referred to as SPT-DAG, that has the following characteristics: (1) provides multipath routing over directed acyclic graphs (DAG); (2) the shortest path tree is guaranteed to be part of the DAG; and (3) provides guaranteed recovery from single link failures. We develop a polynomial time algorithm to compute the SPT-DAG and a routing protocol to forward packets over the SPT-DAG using one overhead bit in the packet. We consider different load-balancing approaches for forwarding a packet when the packet has not encountered a failure. Through extensive flow-based simulations, we show that the SPT-DAG performs significantly better than those approaches that exclusively target load balancing or resiliency.