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There has been an exponential increase in the usage of multimedia services inmobile networks in recent years. To address this accelerating data demand,mobile networks are experiencing a subtle transformation in their architecture.One of the changes in this direction is the support of Multicast/BroadcastService (MBS) in the Third Generation Partnership Project (3GPP) FifthGeneration (5G) network. The MBS has been introduced to enhance resourceutilization and user experience in 3GPP 5G networks. However, there are certainlimitations in the 3GPP 5G MBS architecture, such as the selection of thedelivery method (unicast or broadcast) by the core network (may result insub-optimal radio resource utilization) and no provision for convergingnon-3GPP broadcast technologies (like digital terrestrial television) withcellular (3GPP 5G) broadband. In this context, we propose a new architecturefor the convergence of cellular broadband and non-3GPP broadcast networks. Anovelty of the architecture is that it treats signalling exchange with UserEquipment (UE) as data (service) which results in improved scalability ofmobile networks. The architecture supports enhanced flexibility in choosing adelivery method (3GPP 5G unicast, 3GPP 5G broadcast, or non-3GPP broadcast) foruser data. We evaluate the performance of the proposed architecture usingprocess algebra-based simulations, demonstrating a significant reduction in thenumber of signalling messages exchanged between the UE and the network for MBSsession establishment as compared to the 3GPP 5G network.

A Flexible Architecture for Broadcast Broadband Convergence in Beyond 5G