International Journal of Future Computer and Communication (IJFCC)
In opportunistic networks, data are often delivered by dissemination-based routing approaches using the store-carry-and-forward concept. However, the heavy overheads incurred by these approaches lead to inefficient data delivery. Generally, users in an area usually demand similar data, called "Locality of demand" and this area is referred to as a community. Based on such property, this paper presents a Community-based data Dissemination (ComD) scheme to improve the data delivery efficiency in the opportunistic network. By delivering data to appropriate communities, users can obtain what they are actually interested in. Moreover, the ComD also uses the cooperative caching technique to reduce transmission redundancy.