Patent ID: 8693379
Filing Date: 2014-04-08
Classification: H04L

Abstract:
1. A communication system that includes first and second communication devices for performing full-duplex communication and half-duplex communication with each other via a handshaking procedure, wherein the first communication device includes: (i) a command signal transmission unit operable to transmit a command signal for requesting data communication to the second communication device via a channel, which is used for data transmission from the first to second communication device in full-duplex communication, and (ii) a first data communication unit operable to receive, from the second communication device, a response signal in response to the command signal, and perform data communication according to a communication scheme specified by the response signal, the second communication device includes: (i) a command signal storage unit that stores therein each command signal transmitted from the first communication device and that has a maximum number of command signals storable therein, (ii) a response signal transmission unit operable to transmit a response signal that specifies either a full-duplex communication scheme or a half-duplex communication scheme, and (iii) a second data communication unit operable to perform data communication, wherein the response signal transmission unit transmits the response signal that specifies the half-duplex communication scheme, when the number of the command signals, which have been stored in the command signal storage unit and whose corresponding data communication has not been executed, has reached the maximum number.