Wireless telephone system
AssigneeMitel Telecom Limited
InventorsMichael J. Carey, Adrian J. Anderson
Life of this patent
Estimating the term…
Abstract
A wireless telephone communication system for wireless, voice, data or voice and data terminals comprising apparatus at a central location for receiving one or a plurality of signals for communication with selected ones of wireless communication terminals, apparatus for converting the signals to spread spectrum radio frequency signals, a leaky transmission line located in a communication region, apparatus for applying the spread spectrum radio frequency signals to the transmission line for electromagnetic radiation within the region, at least one wireless communication terminal adapted to receive a predetermined one of the spread spectrum radio frequency signals and for demodulating it into an intelligible signal.
Claims20
A wireless system for telephone communication within a building, comprising:
- (a) means at a central location for receiving a plurality of signals for communication with selected wireless communication terminals,
- (b) means at said central location for converting said signals to spread spectrum radio frequency signals using correlation codes corresponding to particular idle channels,
- (c) a leaky transmission line located in a communication region within the building,
- (d) means for applying the spread spectrum radio frequency signals to said transmission line for electromagnetic radiation within said region,
- (e) at least one mobile wireless communication terminal adapted to receive a predetermined one of the spread spectrum radio frequency signals within the building and for demodulating it onto an intelligible signal.
A local telephone system comprising:
- (a) a central switching system having a plurality of line circuits,
- (b) means for converting signals carried by at least certain ones of said line circuits to spread spectrum RF signals, each signal carried by said certain line circuits having a different spreading code,
- (c) first means for wireless transmitting said spread spectrum RF signals,
- (d) one or a plurality of mobile telephone sets, for receiving, decoding and reproducing said signals carried by the line circuits and for wireless transmitting to said central switching system spread spectrum RF signals originating at said mobile sets, each said latter signal being transmitted using a spreading code different in each mobile set from other mobile sets.
Dependencies are inferred from the claim text.