An Efficient Routing Scheme for Overlay Network of SOAP Proxies in Constrained Networks

An overlay network of SOAP proxies over constrained and ad hoc networks of military, law enforcement and emergency response is usually established for reliable access of standard Web services. SOAP messages are stored and forwarded reliably from node to node using a reliable message oriented transport. For dynamic access of Web services across participating networks, a SOAP proxy node needs to find the next SOAP proxy node towards destination. In this paper, first we propose an efficient routing scheme considering structure and constraints of underlying networks of higher delay, frequent packet loss and limited bandwidth. Second, we propose the use of logical hierarchical names for overlay nodes which helps minimizing routing overheads and simplifies management of addresses. Through a limited scope proactive routing our routing scheme finds routes to nodes on adjacent networks. Whereas it uses hierarchical node names to derive routes to farther destinations on hierarchically deployed operational networks. Proposed scheme has been evaluated by analyzing routing overhead with variation of total number of nodes on participating networks. Simulation results demonstrate a good performance of our routing scheme for overlay network of SOAP proxies.