Testbed Experiments on the Location to Service Translation (LoST) Protocol for Mobile Users

The Location to Service Translation (LoST) protocol is a service discovery protocol, which uses location information to map service Uniform Resource Identifiers (URI). The LoST protocol was developed to support the routing process of IP-based emergency calls, known as Next Generation 9-1-1 (NG-911). In this paper, we describe testbed experiments and a new algorithm to improve the performance of the LoST protocol for mobile users. The proposed algorithm is based on the minimum distance approach to detect service boundary crossings. After comparing the minimum distance algorithm with the Ray-Tracing method, our results showed that the new algorithm considerably reduces the processing time at the mobile LoST client.