Techniques for delivering and receiving multicast content across a unicast network are described. A system that supports delivery and reception of multicast content across a unicast network includes a first device and a second device. The first device may be a destination device or a multicast-enabled...http://www.google.com.tw/patents/US7281058?utm_source=gb-gplus-share專利 US7281058 - Delivering and receiving multicast content across a unicast network
