Enhancing SIP with spatial location for emergency call services

This paper introduces an approach for providing spatial location (SLO) information as payload of the session initiation protocol (SIP). The aim of the paper is to set up the framework for providing emergency call services in devices connected to wired and wireless IP networks. This document analyses the relationship among the network elements involved in the architecture, and its functionality for providing emergency call services using SIP. In conclusion, this proposal enhances SIP to track down an emergency call, and additionally enables SIP to support some other location-related services such as messaging, and location-based commerce.