USING DATA ON DIGITAL CELLULAR AND PCS VOICE NETWORKS

Many new digital cellular and personal communications services (PCS) n etworks that provide both voice and data communication capabilities ar e being installed in the United States and around the world. Current c ellular and PCS handsets primarily target voice telephony, but the nex t generation will also support data services. In this paper we review the current offerings in wireless handsets that support both voice and data services and also present our design for a next-generation wirel ess handset. We discuss the tradeoffs in selecting an operating system and input device, and in designing a user interface. The physical des ign of our user interface and the wired network infrastructure support applications such as telephone directory, electronic mail, and Web br owsing. The result is a small, user-friendly handset featuring handwri ting recognition, foldable video graphics adapter (VGA)-sized liquid c rystal display (LCD) screens, and the Inferno(TM) operating system.