ADVANCED CELLULAR INTERNET SERVICE (ACIS)

The public's desire for mobile communications and computing, as eviden ced by the popularity of cellular phones and laptop computers combined with the explosive demand for Internet access suggest a very promisin g future for wireless data services. The key to realizing this potenti al is the development and deployment of high-performance radio systems . In this article we describe a basic service concept, Advanced Cellul ar Internet Service (ACIS), and the technologies for achieving reliabl e high-speed transmission to wide-area mobile and portable cellular su bscribers with very high spectrum efficiency. Such a wireless service, optimized to meet the needs of a client-server model for information retrieval and Web browsing, and combined with evolutionary enhancement s in second-generation technologies, can provide an attractive option for third-generation systems. The radio link design combines OFDM with transmit and receive antenna diversity and Reed-Solomon coding to ove rcome the link budget and dispersive lading limitations of the cellula r mobile radio environment. For access, a dynamic packet assignment al gorithm is proposed which combines rapid interference measurements, pr iority ordering, and a staggered frame assignment schedule to provide spectrum efficiencies of two-to-four times existing approaches.