Patent ID: 8558657

Claim:
A communication system comprising: a management device; a plurality of base station devices in communication with the management device; and a plurality of terminal devices each in communication with a corresponding one of the base station devices, wherein the management device comprises a transmission order notification section that notifies each of the plurality of base station devices of a transmission order of a synchronization signal; and a reference base station device notification section that notifies each of the plurality of base station devices of which one of the plurality of base station devices is designated by the management device to serve as a reference; and wherein each one of the plurality of base station devices comprises a synchronization signal transmission section that transmits a synchronization signal based on the transmission order of the one base station device, in a case where the one base station device has been designated by the management device to serve as the reference, and that transmits a synchronization signal at a timing calculated based on (1) a reception time when the one base station device has received the synchronization signal transmitted from the base station device designated by the management device to serve as the reference, (2) the transmission order of the base station device designated by the management device to serve as the reference, and (3) the transmission order of the one base station device, in a case where the one base station device has not been designated by the management device to serve as the reference.