MULTICAST AND BROADCAST SERVICE ESTABLISHMENT

Methods, apparatus, and systems that establish Multicast and Broadcast Service sessions based on existing tunnels between the core network and radio access nodes are disclosed. In one example aspect, a wireless communication method includes receiving, by a first communication node, a request from a core network node to establish a session. The request comprises a list of tunnels established between the core network node and other communication nodes to provide multicast and broadcast service. The method includes selecting, by the first communication node, a channel from the list of tunnels included in the request to establish a multicast and broadcast session that corresponds to the session. The method also includes transmitting, by the first communication node to the core network node, a response indicating an establishment of the session. The response includes information associated with the selected channel between the second communication node and the core network node.