Radio communication system
First Claim
1. A radio communication system which comprises a plurality of base stations and a plurality of mobile stations belonging to service areas covered by radio zones respectively formed by said base stations and performs data communication by polling,each of said plurality of base stations comprising transmission output control means for controlling a transmission output of a polling signal to alternately transmit a long-distance polling signal having a strong transmission output and a short-distance polling signal having a weak transmission output, thereby alternately forming large and small radio zones, and means for receiving responses from said plurality of mobile stations to the long- and short-distance polling signals and determining a specific one of the large and small zones in which each of said mobile stations is located.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio communication system includes a plurality of base stations and a plurality of mobile stations belonging to the service areas covered by the radio zones respectively formed by the base stations and performs data communication by polling. Each base station includes a transmission output control section for controlling the transmission output of a polling signal to sequentially form a plurality of radio zones having different coverages, a section for receiving responses from the plurality of mobile stations to a plurality of polling signals having different transmission outputs and determining the position of each of the mobile stations in a specific one of the plurality of radio zones.
233 Citations
8 Claims
-
1. A radio communication system which comprises a plurality of base stations and a plurality of mobile stations belonging to service areas covered by radio zones respectively formed by said base stations and performs data communication by polling,
each of said plurality of base stations comprising transmission output control means for controlling a transmission output of a polling signal to alternately transmit a long-distance polling signal having a strong transmission output and a short-distance polling signal having a weak transmission output, thereby alternately forming large and small radio zones, and means for receiving responses from said plurality of mobile stations to the long- and short-distance polling signals and determining a specific one of the large and small zones in which each of said mobile stations is located.
-
8. A radio communication system which comprises a plurality of base stations and a plurality of mobile stations belonging to service areas covered by radio zones respectively formed by said base stations and performs data communication by polling,
each of said plurality of base stations comprising transmission output control means for controlling a transmission output of a polling signal to alternately transmit a long-distance polling signal having a strong transmission output and a short-distance polling signal having a weak transmission output, thereby alternately forming large and small radio zones, and means for receiving responses from said plurality of mobile stations to the long- and short-distance polling signals and determining a specific one of the large and small zones in which each of said mobile stations is located, wherein each of the polling signals has an ID for identifying a base station which has originated the polling signal and a transmission output value indicating whether the polling signal is the long-distance polling signal or the short-distance polling signal, and each of said plurality of mobile stations determines, from an ID number of said base station and the transmission output obtained by receiving the polling signal, a specific one of the large and small radio zones in which said mobile station is located and a specific one of said plurality of base stations which forms the radio zone in which said mobile station is located.
Specification