Location-based services in Internet telephony

Many applications used in the Internet today benefit from using location information. To better handle location information in Internet telephony applications, we did a comprehensive application-layer analysis of location information and location-based communication services. We first summarize and categorize end-user-oriented location description and location detection approaches. We then summarize and categorize how to use location information to provide communication services and introduce several interesting location based communication services. Based on the analysis, we have incorporated location-based service handling in our session initiation protocol (SIP) based Internet telephony infrastructure and our language for end system services (LESS).