Telecommunications system, base station thereof and telecommunications method
First Claim
1. A method of broadcasting information to mobile stations within a wireless telecommunications system, wherein said system includes a radio base station having an adaptive array antenna having a plurality of antenna elements, said method comprising the steps of:
- determining the geographic position of a plurality of mobile stations subscribed to receive certain broadcast information;
generating a multicast data transmission signal including said broadcast information; and
feeding said multicast data transmission signal to each of said plurality of antenna elements of said adaptive array antenna, wherein the amplitude and phase of said signal delivered to each of said plurality of antenna elements is adjusted as a function of said geographic position of said plurality of mobile stations, whereby a signal beam is formed having a beam width sufficient to cover only the area substantially bounded by the geographic locations of said plurality of mobile stations.
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Accused Products
Abstract
A wireless telecommunications system capable of transmitting desired information to a plurality of mobile stations efficiently is adapted to transmit the information to the plurality of mobile stations by forming a signal beam that covers these mobile stations simultaneously. Since information can thus be sent to a plurality of mobile stations at the same time, it is possible to send information in a highly efficient. In addition, because transmission power can be reduced, interference acting upon other mobile stations can be suppressed.
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Citations
10 Claims
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1. A method of broadcasting information to mobile stations within a wireless telecommunications system, wherein said system includes a radio base station having an adaptive array antenna having a plurality of antenna elements, said method comprising the steps of:
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determining the geographic position of a plurality of mobile stations subscribed to receive certain broadcast information; generating a multicast data transmission signal including said broadcast information; and feeding said multicast data transmission signal to each of said plurality of antenna elements of said adaptive array antenna, wherein the amplitude and phase of said signal delivered to each of said plurality of antenna elements is adjusted as a function of said geographic position of said plurality of mobile stations, whereby a signal beam is formed having a beam width sufficient to cover only the area substantially bounded by the geographic locations of said plurality of mobile stations. - View Dependent Claims (2, 3, 4, 5)
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6. A system for broadcasting information to mobile stations within a wireless telecommunications network, wherein said network includes a radio base station having an adaptive array antenna having a plurality of antenna elements, said system comprising:
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means for determining the geographic position of a plurality of mobile stations subscribed to receive certain broadcast information; means for generating a multicast data transmission signal including said broadcast information; and means for feeding said multicast data transmission signal to each of said plurality of antenna elements of said adaptive array antenna, wherein the amplitude and phase of said signal delivered to each of said plurality of antenna elements is adjusted as a function of said geographic position of said plurality of mobile stations, whereby a signal beam is formed having a beam width sufficient to cover only the area substantially bounded by the geographic locations of said plurality of mobile stations. - View Dependent Claims (7, 8, 9, 10)
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Specification