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.

翻译：随着业务需求的爆炸式增长，超越第五代（B5G）通信旨在实现多业务网络的多样化需求，即相比5G，为混合增强移动宽带（eMBB）与超可靠低时延通信（URLLC）业务提供更高性能。为灵活服务差异化流量，5G协议规定了多种功能拆分选项（FSO），支持不同网络功能的部署。为提升边缘用户信号质量，我们考虑基于FSO的协调多点（CoMP）传输技术，该技术能够有效支撑高流量需求。然而，受限于传统硬件处理能力受限，本文引入处理器共享（PS）模型以应对多业务FSO网络的高时延问题。因此，在PS模型下分配CoMP增强型功能拆分模式至关重要。通过随机几何方法，推导出基于FSO网络在遍历速率与可靠性方面更易处理的性能表征。此外，我们提出CoMP增强型功能拆分模式分配（CFSMA）方案，可自适应分配FSO，以提供增强的混合吞吐量与感知时延服务。仿真结果验证了理论推导的正确性，并表明所提CFSMA方案在保障严格时延需求的同时优化了系统频谱效率。所提CFSMA方案结合设计的PS FFS-CoMP系统，在性能上优于现有文献中的传统FCFS调度、非FSO网络、固定FSO及有限可用FSO选择等基准方案。