Apparatuses and mobile stations are described which provide packet data services in TDMA (Time Division Multiple Access) cellular systems, based on providing shared packet data channels optimized for packet data. A first "integrated" embodiment utilizes the current cellular infrastructure to the extent...http://www.google.de/patents/US5590133?utm_source=gb-gplus-sharePatent US5590133 - Apparatuses and mobile stations for providing packet data communication in digital TDMA cellular systems
