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

TL;DR

This paper proposes a CoMP-enhanced flexible functional split scheme for beyond 5G networks, improving spectrum efficiency and latency for mixed services using stochastic geometry and adaptive mode allocation.

Contribution

It introduces a novel CoMP-based functional split mode allocation scheme with a processor sharing model, optimizing performance for diverse B5G service requirements.

Findings

CFSMA scheme improves spectrum efficiency and latency performance.

Analytical models accurately predict network ergodic rate and reliability.

Proposed scheme outperforms traditional scheduling and fixed configurations.

Abstract

With explosively escalating service demands, beyond fifth generation (B5G) aims to realize various requirements for multi-service networks, i.e., higher performance of mixed enhanced mobile broadband (eMBB) and ultra-reliable low-latency communication (URLLC) services than 5G. To flexibly serve diverse traffic, various functional split options (FSOs) are specified by 5G protocols enabling different network functions. In order to improve signal qualities for edge users, we consider FSO-based coordinated multi-point (CoMP) transmission as a prominent technique capable of supporting high traffic demands. However, due to conventional confined hardware processing capability, a processor sharing (PS) model is introduced to deal with high latency for multi-service FSO-based networks. Therefore, it becomes essential to assign CoMP-enhanced functional split modes under PS model. A more tractable FSO-based network in terms of ergodic rate and reliability is derived by stochastic geometry approach. Moreover, we have proposed CoMP-enhanced functional split mode allocation (CFSMA) scheme to adaptively assign FSOs to provide enhanced mixed throughput and latency-aware services. The simulation results have validated analytical derivation and demonstrated that the proposed CFSMA scheme optimizes system spectrum efficiency while guaranteeing stringent latency requirement. The proposed CFSMA scheme with the designed PS FFS-CoMP system outperforms the benchmarks of conventional FCFS scheduling, non-FSO network, fixed FSOs, and limited available FSO selections in open literature.