Research On Three-Layer Resource Allocation Mechanism Of Deterministic Networking Based On Network Slice

In recent years,the Internet has entered the stage of industrial Internet,the remote control time-sensitive services such as telemedicine,remote driving and network manufacturing have been widely concerned.The common requirements of these services on the underlying network include deterministic indexes such as bounded bandwidth,delay,jitter and loss,the existing resource reservation mechanisms based on the Quality of Service(Qo S)category are limited by the "best efforts" transmission characteristics of Internet Protocol(IP)datagram networks,which can only partially guarantee the Service bandwidth and cannot meet the requirements of upper and lower guarantee such as delay jitter.In view of this,the industry proposes to guarantee the deterministic network of timedelay sensitive service Qo S in large-scale backbone networks,and reduce the resource competition generated by the transmission of new services at the network layer through resource reservation and allocation technologies.In order to solve the problem of resource competition and isolation in the process of concurrent service transmission in deterministic networks,a Heuristics Deterministic Network Soft Slicing algorithm(HDNSS)based on heuristicsis algorithm is proposed.The deterministic service resource allocation problem is modeled as the minimum delay objective optimization problem with multiple constraints,and the heuristic algorithm is used to solve the allocation strategy of multiple deterministic demand traffic and resource slice in deterministic network,so as to realize the reuse,isolation,allocation and management of service flow in network resource space.Furthermore,in order to solve the problem of delay jitter uncertainty caused by traffic accumulation bursts caused by service flows entering and exiting the network in deterministic network slices and network transmission real-time resource competition,a Time Slot Deterministic-slice Resource Scheduling algorithm(TSDRS)based on timeslot is proposed to allocate resources in Deterministic slices.The algorithm use genetic algorithm to allocate timeslots and paths for deterministic services,and further allocate deterministic traffic flows to finer timeslot granularity for transmission,so as to ensure resource isolation,allocation and management in the time domain and realize efficient utilization and scheduling of resources within slices.The final simulation experiment results show that compared with other slicing algorithms,HDNSS can reduces the overall delay and jitter by more than 10%,and has better performance in Qo S indicators such as packet loss rate and bandwidth guarantee rate.Compared with other timeslot scheduling algorithms,TSDRS can further reduce the time delay and jitter by more than 20%.And the organic combination of the two algorithm can meet the requirements of new services complex Qo S in the deterministic network,solve the unnecessary resource competition problem in the three-layer deterministic network,improve the resource utilization rate of the deterministic network.