The invention comprises a method and apparatus for managing a multicast tree. Specifically, the method comprises receiving at least one request for modifying the multicast tree where the at least one request is associated with at least one user device, determining at least one multicast tree change in...http://www.google.com.tw/patents/US20060221859?utm_source=gb-gplus-share專利 US20060221859 - Method and apparatus for managing a multicast tree
