Rate-Splitting Multiple Access Based Coordinated Multi-Point Transmission in Multi-Service Network

Rate-Splitting Multiple Access (RSMA) as a promising downlink power-domain non-orthogonal scheme, it is widely concerned in multi-service network recently. RSMA can superimpose multiple service messages on the same resource block, and decode expected message successively through Successive Interference Cancellation (SIC), which provides spectrum and energy efficiency enhancements over Orthogonal Multiple Access (OMA). This paper presents a RSMA-based downlink coordinated multipoint (CoMP) network multi-service transmission scheme.. In the proposed optimization system framework, the central processing unit processes broadcast and multicast service messages, while unicast service messages are processed in the base station (BS) of the target user's cell. All messages are superimposed in the power domain and sent by BSs of the target user's cell. Formulation results show that our scheme can reduce the backhaul cost and obtain a higher sum-rate.