Patent ID: 8321453

Claim:
A communication system comprising: a communication device; and a data receiver that is configured so as to be capable of being connected to the communication device, the communication device comprising: a content summary receiving unit that is configured so as to be capable of receiving content summary data transmitted from an external device, the content summary data including at least positional data and title data for content data; and a positional data transmitting unit that is configured so as to be capable of outputting the positional data for the content data according to a prescribed communication protocol, the data receiver comprising: a scheduled port querying unit configured to query the communication device for a scheduled port conforming to the communication protocol, the communication device scheduled to output the positional data for the content data, the output transmitted through the scheduled port to the data receiver, the communication device further comprising: a scheduled port notifying unit that, upon receiving the scheduled port query from the data receiver, transmits to the data receiver a scheduled port notification indicating the scheduled port, the data receiver further comprising: a determining unit that, upon receiving the scheduled port notification from the communication device, determines whether the scheduled port indicated in the scheduled port notification is available; and an availability notifying unit that, when the determining unit has determined that the scheduled port is available, transmits to the communication device an availability notification indicating the scheduled port that is determined as being available, the communication device further comprising: an active port setting unit that, upon receiving the availability notification from the data receiver, sets the scheduled port indicated by the availability notification as an active port; and an active port notifying unit that transmits to the data receiver an active port notification indicating the active port, the positional data transmitting unit transmitting the positional data for the content data to the data receiver through the active port at a prescribed timing and according to the prescribed communication protocol, the data receiver further comprising: an active port receiving unit that receives the active port notification from the communication device; and a positional data receiving unit that is configured so as to be capable of receiving, via the active port indicated in the active port notification, the positional data for the content data outputted from the communication device.