Methods and apparatus for determining and maintaining user presence information include capturing user presence data with an application presence server. The application presence server can be configured to update user presence data as a user initiates or exits an application. Applications associated...http://www.google.com/patents/US7447495?utm_source=gb-gplus-sharePatent US7447495 - Methods and systems for providing application level presence information in wireless communication
Methods and systems for providing application level presence information in ...
