Using local speed information as routing metric for delay tolerant networks

In many practical situations, the mobility is critical factor for an intended message delivery. Recently studies have found that mobility itself affects the network performance (capacity of the network, security, connectivity, coverage, etc.). However, how to effective use these characteristics of mobility in design DTN routing protocol has not been well studied yet. In this paper, we proposed a routing protocol that uses speed of the local node as routing metric for opportunistic packet relay in DTN (Delay Tolerant Networks). Moreover, the choosing of the relay nodes is only based on the comparison of speed value. It does not require any history information, global knowledge or mobility patterns of other nodes. This makes our schemes ideal for resources limited (computational power, memory, etc.) and dynamic large-scale networks. The performance of our protocol is compared with several related works. Simulations show that our scheme has better performance. Key-Words: DTN, n-copy routing, mobility, resources, ONE