Patent ID: 6718159
Filing Date: 2004-04-06
Classification: H04B

Abstract:
A radio communication system in which a plurality of radio stations perform data exchange by radio communication, wherein:each of said plurality of radio stations has a function of outputting data to another radio station in said radio communication system, a function of receiving data from another radio station, and a function of relaying data in response to a request from another radio station; the function of relaying data in response to a request from another radio station has a normal mode which is utilized in a state where a line connection can be directly made, and a relay mode in which at least one relay station intervenes between the radio stations; when the radio station outputs data to a specific target radio station but there is no acknowledgment from the target radio station, the radio station outputs relay request packets by inputting a non-modulation signal at a time position corresponding to addresses which are assigned to the radio station performing transmission so that the relay of the data is requested to many unspecified radio stations, and the other radio stations, which have received the relay request packets in a radio communication area of the radio station, output the relay request packets by inputting a non-modulation signal at a time position corresponding to addresses which are respectively assigned for each of the other radio stations at the same output timing simultaneously to the target radio station; and when the target radio station, which has received the data relay request packets relayed by the many unspecified relay stations, acknowledges the receipt of the data to the relay request packets, it selects an optimum radio station for relaying the data from a reception level status of a signal indicating the address which is assigned to the radio station, the address being inputted into the relay request packets which have been simultaneously transmitted from the many unspecified radio stations, and outputs relay mode packets including the address which is assigned to the radio station, the address being firstly outputted as a target of acknowledging the receipt of the data to the selected optimum radio station.