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With explosively escalating service demands, beyond fifth generation (B5G)aims to realize various requirements for multi-service networks, i.e., higherperformance of mixed enhanced mobile broadband (eMBB) and ultra-reliablelow-latency communication (URLLC) services than 5G. To flexibly serve diversetraffic, various functional split options (FSOs) are specified by 5G protocolsenabling different network functions. In order to improve signal qualities foredge users, we consider FSO-based coordinated multi-point (CoMP) transmissionas a prominent technique capable of supporting high traffic demands. However,due to conventional confined hardware processing capability, a processorsharing (PS) model is introduced to deal with high latency for multi-serviceFSO-based networks. Therefore, it becomes essential to assign CoMP-enhancedfunctional split modes under PS model. A more tractable FSO-based network interms of ergodic rate and reliability is derived by stochastic geometryapproach. Moreover, we have proposed CoMP-enhanced functional split modeallocation (CFSMA) scheme to adaptively assign FSOs to provide enhanced mixedthroughput and latency-aware services. The simulation results have validatedanalytical derivation and demonstrated that the proposed CFSMA scheme optimizessystem spectrum efficiency while guaranteeing stringent latency requirement.The proposed CFSMA scheme with the designed PS FFS-CoMP system outperforms thebenchmarks of conventional FCFS scheduling, non-FSO network, fixed FSOs, andlimited available FSO selections in open literature.

CoMP-Enhanced Flexible Functional Split for Mixed Services in Beyond 5G Wireless Networks