|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||455/031.3 ; 455/422|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 114 인용 특허 : 11|
A two-way data network includes a broadcast control sub-network and a cellular data sub-network. The broadcast control sub-network includes a few high-power radio transmitters broadcasting into a large service area. The cellular data sub-network covers the large service area by a number of base stations each servicing a relatively small area. The wireless terminals of the two-way data network monitors the messages in a broadcast control channel at pre-assigned periodic time slots and remain in "sleep" mode at other times. A packet radio transceiver in th...
[ We claim:] [1.] A wireless data network serving a service area, comprising:a network control center;a plurality of cellular base stations, each serving a portion of said service area, each of said cellular base station communicating with said network control center;a plurality of mobile wireless terminals each capable of two-way communication with said cellular base stations over a first radio link, each of said mobile wireless terminals also capable of receiving a broadcast message over a second radio link; anda broadcast network, including a transmit...