Patent ID: 9621364
Date: 2017-04-11
CPC Classifications: H04L,H04N

Claim:
1. A method of switching from a first Internet Protocol (IP) television channel arranged to be delivered to a plurality of nodes, to a second unicast IP television channel, the method comprising: at an IP television receiving node, receiving the first IP television channel; determining that the first IP television channel is no longer available; in response to determining that the first IP television channel is no longer available, identifying an IP television content provider node capable of providing a same media as the first IP television channel in a unicast; sending a Session Initiation Protocol (SIP) re-invite message to an IP television Application Server, the SIP re-invite message including an instruction to switch to the second unicast IP television channel and an address for the IP television content provider node, informing the IP television Application Server to use the identified IP television content provider node for the second unicast IP television channel; and receiving the second unicast IP television channel.