Patent ID: 8862066

Claim:
A communication device comprising: a reception unit which receives and accumulates a first datum which a first device transmits addressing a second device, and a second datum which the second device transmits; a transmission unit which transmits said first datum to said second device; a quality index acquisition unit which acquires a first index which is a quality of communication between said first device and said second device, and a second index which is a quality of communication between said communication device and said second device; and a judgment unit which makes said transmission unit transmit said accumulated first datum to said second device in the case of judging that said second index is better than said first index, and a reception condition of said second datum shows that said second device does not receive normally said first datum, wherein said first index is a signal to noise ratio of said second datum at said first device; said second index is a signal to noise ratio of said second datum at said communication device; and said judgment unit judges that said second index is better than said first index in the case that said second index is larger than said first index.