Extensible mobile presence

摘要: Presence is regarded as an important enabler for novel services in third-generation wireless networks (3G) (e.g, instant messaging). Standardization 3GPP has adopted the IETF model presence but integrated it into 3G service reachability and control support. Similarly, alternative approaches (e.g., Wireless Village or Messenger/.NET) restrict user's use of other ways. The paper examines some fundamental properties mobile presence, what support available limitations caused by this Finally, I present user-centric approach, with extensible which operator provider independent, that removes these previous limitations.