A cellular wireless packet data communication system containing transmit-only endpoint devices which transmit to receive-only base stations. The system is configured to allow for large area coverage (e.g., a metropolitan area) with far fewer number base stations than are required with conventional two-way...http://www.google.de/patents/US20040131125?utm_source=gb-gplus-sharePatent US20040131125 - Enhanced wireless packet data communication system, method, and apparatus applicable to both wide area networks and local area networks
