Patent ID: 8880737

Claim:
A communications system, comprising: a plurality of set top boxes (STBs) each having an Internet Group Management Protocol (IGMP) host IP address; a digital subscriber line access multiplexer (DSLAM) configured to receive network data from a communications network and comprising, a network port connected to each of the STBs and configured to provide an IGMP channel to the STBs over which the network data is delivered, and a network interface list indicative of which STBs are joined to the IGMP channel, and wherein during a channel change request from a STB, the DSLAM is configured to drop the IGMP channel when the network interface list indicates there are no other STBs connected to the network port and IGMP channel, and if there is still at least one STB connected to the network port and IGMP channel, determine available bandwidth, and if bandwidth is available, continue providing the IGMP channel, wherein said DSLAM is configured to determine available subscription bandwidth demand of the STBs.