Control method of radio communication system, radio communication system, and radio communication apparatus

摘要

A communication device 1 (transceivers 400) transmits a training signal from its own transmitting antenna while performing beam scanning, and a communication device 2 (transceivers 500) receives this training signal in a state where a quasi-omni pattern is generated in its own receiving antenna. Further, the device 1 transmits a training signal in a state where a quasi-omni pattern is generated in the transmitting antenna, and the device 2 receives this training signal by the receiving antenna while performing beam scanning. The device 1 and 2 detects, from respective reception results, transmitting-antenna-setting candidates of the device 1 and receiving-antenna-setting candidates of the device 2,and determines antenna-setting pairs (combinations of antenna-setting candidates). The above-described processes are also performed for a receiving antenna of the device 1 and a transmitting antenna of the device 2. The device 1 and 2 communicates by using the obtained antenna-setting pairs. In this way, when radio communication is performed by using beam forming, the time necessary for finding and setting a beam direction is reduced, thereby reducing the transmission-disconnected time.

主权项

1. A control method of a radio communication system comprising first and second communication devices, wherein
the first communication device is configured to control a transmission beam direction of a first transmitting antenna by changing transmitting-antenna setting and to control a reception beam direction of a first receiving antenna by changing receiving-antenna setting, the second communication device is configured to control a transmission beam direction of a second transmitting antenna by changing transmitting-antenna setting and to control a reception beam direction of a second receiving antenna by changing receiving-antenna setting, and the method comprises: (a) transmitting a training signal from the first transmitting antenna while changing antenna setting of the first transmitting antenna; (b) receiving the training signal by the second receiving antenna in a state where a fixed beam pattern is set in the second receiving antenna; (c) obtaining a data string describing a relation between antenna setting of the first transmitting antenna and a reception signal characteristic of the second receiving antenna based on a reception result of the training signal obtained in the operation (b); (d) determining, by using the data string, at least one first transmitting-antenna-setting candidate, which each serves as a candidate to be used for communication, of the first transmitting antenna; (e) determining at least one second transmitting-antenna-setting candidate, which each serves as a candidate to be used for communication, of the second transmitting antenna, by performing the operations (a) to (d), which were performed by using the first transmitting antenna and the second receiving antenna, for a combination of the second transmitting antenna and the first receiving antenna; (f) transmitting a training signal from the first transmitting antenna in a state where a fixed beam pattern is set in the first transmitting antenna; (g) receiving the training signal by the second receiving antenna while changing antenna setting of the second receiving antenna; (h) obtaining a data string describing a relation between antenna setting and a reception signal characteristic of the second receiving antenna based on a reception result of a training signal obtained in the operation (g); (i) determining at least one second receiving-antenna-setting candidate, which each serves as a candidate to be used for communication, of the second receiving antenna by using the data string; (j) determining at least one first receiving-antenna-setting candidate, which each serves as a candidate to be used for communication, of the first receiving antenna, by performing the operations (f) to (i), which were performed by using the first transmitting antenna and the second receiving antenna, for a combination of the second transmitting antenna and the first receiving antenna; and (k) using, for communication between the first and second communication devices, a combination of one of the at least one first transmitting-antenna-setting candidate and one of the at least one second receiving-antenna-setting candidate, and a combination of one of the at least one first receiving-antenna-setting candidate and one of the at least one second transmitting-antenna-setting candidate.