Core Function Prepositioning for Point-to-Point Service Slicing in Large-Scale Optical Networks

To accommodate three typical 5G services with satisfied performance requirements, spectrum slicing has been adopted and widely studied in the wireless transmission part. For the wired transmission part, the high-capacity and large-scale optical network is widely used for transferring 5G traffics. To improve the spectrum efficiency and reduce the time delay while accommodating 5G services, optical networks need to adapt to the wireless spectrum slicing. Traditionally, all spectrum resources in optical networks form a resource pool which is equally allocated to applications bit by bit until it is all used up. Although this pattern reduces the resource maintenance complexity, it has a high operation complexity for 5G services. If some important network functions are realized in advance, a 5G service can be easily deployed with simplified operations and satisfied performance requirements. In this letter, a novel framework of core function prepositioning is proposed to efficiently accommodate 5G services in optical networks. It adopts the centralized control model and two network functions of fast connection establishment and disaster-resilient survivability are realized in planned spectrum areas in advance. This framework adapts to the wireless spectrum slicing and has a significant performance boost while accommodating 5G services.