Patent ID: 9392599
Filing Date: 2016-07-12
CPC Classification: H04B,H04W

Claim Text:
1. A communication system comprising a movable terminal device and a plurality of communication devices configured to perform radio communication with said terminal device, wherein said plurality of communication devices include a large-scale communication device having a first range in which communication between said large-scale communication device and said terminal device is possible and a small-scale communication device having a second range in which communication between said small-scale communication device and said terminal device is possible, the first range being larger than the second range, said large-scale communication device and said small-scale communication device are configured to communicate with each other and are installed such that at least parts of said first and second ranges overlap each other, said small-scale communication device is configured to receive an uplink resource transmitted to said large-scale communication device from said terminal device and, upon receipt of said uplink resource, transmit a reception signal regarding said uplink resource to said large-scale communication device, and said large-scale communication device combines a reception signal regarding said uplink resource transmitted from said terminal device and the reception signal regarding said uplink resource transmitted from said small-scale communication device to produce a combined reception signal, and said large-scale communication device decodes information from the combined reception signal, and an uplink transmission power and an effective period of the uplink transmission power of said terminal device are set based on a moving speed of said terminal device, said effective period of the uplink transmission power indicating an elapsed time after which use of the uplink transmission power is ended, and said terminal device performs an uplink transmission with the small-scale communication device having the uplink transmission power until the effective period of the uplink transmission power ends, and thereafter, said terminal device performs an uplink transmission with the large-scale communication device having an increased uplink transmission power that is greater than the uplink transmission power set based on the moving speed of said terminal device.