ENUM Based Service Discovery Architecture for 6LoWPAN

Service discovery in Ubiquitous Sensor Networks has been targeted mostly for services available within certain proximity, but the service availability only in close vicinity is no longer feasible in the pervasive and ubiquitous era. In order to address the ubiquity in service discovery, we have proposed a framework that makes use of the Electronic Number Mapping (ENUM) protocol. Our network architecture consists of sensor nodes associated with few relatively powerful nodes called master nodes. Only master nodes within IPv6 enabled Low power Personal Area Networks (6LoWPANs) are assigned unique E.164 numbers so that the services offered by the network could be accessed globally. Services destined for sensor nodes first reach the master node to which they are associated to, using the E.164 number of the master node. The gateway of the network performs the task of converting attribute-value pair based human readable queries to E.164 numbers. Also the gateway facilitates its network by running ENUM protocol for service sharing like multimedia, mail, web and many other services. Moreover, a significant improvement in service discovery cost in terms of latency and traffic overhead is observed.