US Patent 7969997 Video communications in a peer-to-peer network

Packet-based delivery of video content is facilitated using a peer-to-peer network. According to an example embodiment of the present invention, a packet-based video stream is passed over a peer-to-peer network, with the packets in the stream scheduled and delivered in accordance with a priority assigned to the packets; this priority is based upon a determined or estimated effect that the packet will have upon video quality at a recipient peer. In some applications, the packets are temporally spaced to mitigate congestion and/or distortion of video associated with congestion in the delivery of the packets.