Radio communication system using portable mobile terminal

Claim 2

A radio communication system comprising: a first radio station including a single transmitting antenna for forming a plurality of beams of different maximum radiated directions, said first radio station adding to a signal, transmitted by a beam of number i among the plurality of beams, beam identification information that is capable of discriminating that said signal is transmitted by said beam of number i, and a receiving antenna for receiving radio signals, which are transmitted from other radio stations by a wide-angle or omni-directional beam; and a second radio station including a receiving antenna which is capable of receiving said signals transmitted by said beams from said receiving antenna of said first radio station, a receiver for selectively receiving, on the basis of an estimation standard, a signal of a beam of number j among specific beams formed by said transmitting antenna of said first radio station, and a transmitting antenna for forming a wide-angle or omni-directional beam to transmit said beam of number j selectively received among the beams transmitted from said transmitting antenna of said first radio station.

Claim 3

A radio communication system according to claim 1, wherein said first radio station receives a signal, to which information on said number j of said beam selectively received by said second radio station is added, and wherein said signal to be transmitted to said second radio station is transmitted by using said beam of number j among said plurality of beams of different maximum radiated directions.

Claim 4

The radio communication system according to claim 1: wherein a frequency band of radio waves transmitted by said first radio station is higher than a frequency band of received radio waves.

Claim 5

A radio communication method comprising: receiving a radio signal from among a plurality of radio signals, the radio signal being transmitted by one or more beams to which beam identification information is added; selecting optimum beam identification information which corresponds to the best beam from transmitting the radio signal, according to a predetermined estimation standard; requiring a transmission of communication information included in the radio signal transmitted on the beam having the selected beam identification information; and receiving the communication information included in the radio signal, wherein the method includes forming a plurality of beams each having different maximum radiated directions by means of a transmitting antenna of a first radio station, and adding, to a radio signal transmitted by a beam of number i among the plurality of beams, beam identification information that is capable of discriminating that said radio signal is transmitted by said beam of number i, receiving said radio signal transmitted by said beam from the transmitting antenna from said first radio station, by means of a receiving antenna of a second radio station, selecting a signal of a beam of number j from specified beams of the transmitting antenna of said first radio station according to said predetermined estimation standard, by means of a receiver of said second radio station, transmitting said beam of number j which is selectively received from the plurality of beams transmitted from said transmitting antenna of said first radio station, by a formed wide-angle or omni-directional beam, by means of a transmitting antenna of said second radio station, receiving radio signals transmitted from other radio stations by a wide-angle or omni-directional beam, by means of a receiving antenna of said first radio station, and acquiring communication information by receiving the communication information with the beam identification information which is transmitted through the transmitting antenna of said first radio station, by means of the receiving antenna of said second radio station.

Claim 6

A radio communication method comprising: receiving a radio signal from among a plurality of radio signals, the radio signal being transmitted by one or more beams to which beam identification information is added; selecting optimum beam identification information which corresponds to the best beam from transmitting the radio signal, according to a predetermined estimation standard; requiring a transmission of communication information included in the radio signal transmitted on the beam having the selected beam identification information; and receiving the communication information included in the radio signal, wherein the method includes forming a plurality of beams each having different maximum radiated directions by means of a transmitting antenna of a first radio station, and adding, to a radio signal transmitted by a beam of number i among the plurality of beams, beam identification information that is capable of discriminating that said radio signal is transmitted by said beam of number i, receiving said radio signal transmitted by said beam from the transmitting antenna from said first radio station, by means of a receiving antenna of a second radio station, selecting a signal of a beam of number j from specified beams of the transmitting antenna of said first radio station according to said predetermined estimation standard, by means of a receiver of said second radio station, transmitting said beam of number j which is selectively received from the plurality of beams transmitted from said transmitting antenna of said first radio station, by a formed wide-angle or omni-directional beam, by means of a transmitting antenna of said second radio station, receiving radio signals transmitted from other radio stations by a wide-angle or omni-directional beam, by means of a receiving antenna of said first radio station, and acquiring communication information by receiving the communication information with the beam identification information which is transmitted through the transmitting antenna of said first radio station, by means of the receiving antenna of said second radio station.

Claim 7

The radio communication system according to claim 4, wherein said predetermined estimation standard is intensity of a radio signal, and wherein a signal of a beam of the maximum received-signal intensity transmitted from said transmitting antenna is selected.

Claim 8

The radio communication system according to claim 4, wherein said predetermined estimation standard is a signal-to-noise ratio (S-N ratio) of a received signal, and wherein a signal of a beam of the maximum S-N ratio transmitted from said transmitting antenna is selected.

Claim 9

The radio communication system according to claim 4, wherein said predetermined estimation standard is said beam identification information, and wherein a signal of a beam specified by said beam identification information is selected.

Claim 10

A radio communication system comprising: a first radio station including a transmitting antenna for forming a plurality of beams of different maximum radiated directions, said first radio station adding to a signal transmitted by a beam of number i among the plurality of beams, beam identification information that is capable of discriminating that said signal is transmitted by said beam of number i, and a receiving antenna for receiving radio signals, which are transmitted from other radio stations by a wide-angle or omni-directional beam; and a second radio station including a receiving antenna which is capable of receiving said signals transmitted by said beams from said transmitting antenna of said first radio station, a receiver for selectively receiving, on the basis of an estimation standard, a signal of a beam of number j among specific beams formed by said transmitting antenna of said first radio station, and a transmitting antenna for forming a wide-angle omni-directional beam to transmit said beam of number j selectively received among said beams transmitted from said transmitting antenna of said first radio station; wherein said second radio station uses at least one of a narrow-angle or unidirectional beam in transmitting and receiving communication information, together with said wide-angle or omni-directional beam.

Claim 11

A radio communication system comprising: a first radio station including a transmitting antenna for forming a plurality of beams of different maximum radiated directions, said first radio station adding to a signal transmitted by a beam of number i among the plurality of beams, beam identification information that is capable of discriminating that said signal is transmitted by said beam of number i, and a receiving antenna for receiving radio signals, which are transmitted from other radio stations by a wide-angle or omni-directional beam; and a second radio station including a receiving antenna which is capable of receiving said signals transmitted by said beams from said transmitting antenna of said first radio station, a receiver for selectively receiving, on the basis of an estimation standard, a signal of a beam of number j among specific beams formed by said transmitting antenna of said first radio station, and a transmitting antenna for forming a wide-angle omni-directional beam to transmit said beam of number j selectively received among said beams transmitted from said transmitting antenna of said first radio station; wherein said second radio station uses at least one of a narrow-angle or unidirectional beam in transmitting and receiving communication information, together with said wide-angle or omni-directional beam.