Patent ID: 6870843
Filing Date: 2005-03-22
Classification: H04L

Abstract:
1. A method for receiving over a public data network a multicast signal at an end user system coupled to the public data network, the end user system performing the method comprising: determining if a request to receive the mulitcast signal has occurred; testing a subnetwork for a first multicast routing protocol, if a request to receive the mulitcast signal was determined to have occurred; implementing the first multicast routing protocol, if the result of the test includes a received message indicating the first multicast routing protocol is one of a protocol capable of being used or presently being used and the received message meets a preset criteria; testing the subnetwork for a subsequent multicast routing protocol, if the result of the test for the first multicast routing protocol includes one of the received message indicating the first multicast routing protocol is not one of a routing protocol capable of being used or is not presently being used, or the received message fails to meet the preset criteria; and implementing the subsequent multicast routing protocol, if the result of the test for the subsequent multicast routing protocol includes a received message indicating the first multicast routing protocol is one of a routing protocol capable of being used or presently being used and the received message meets the preset criteria; and repeating testing a subnetwork for a subsequent multicast routing protocol and implementing the subsequent multicast routing protocol, until the result of the test includes a received message indicating the subsequent multicast routing protocol is one of a routing protocol capable of being used or is presently being used and the received message meets the present criteria.