Research On Access Network Resource Scheduling And Optimization Mechanism For Fixed-mobile Convergence

As the cost of 5G network construction increases,independent network construction will no longer be the mainstream solution for future access network.How to support high-quality and efficient fixed-mobile convergence services has become a huge challenge for optical access networks.In terms of network architecture,the traditional access network architecture is inflexible,which cannot meet the flexible requirements of fixed-mobile convergence services.In terms of resource management,the access network still uses manual way to deploy services.The mechanism makes network resources inflexible and difficult to deploy network services quickly.These features cannot meet the flexibility needs of future network services.In terms of service supporting,traditional access networks do not have an efficient mechanism to support fixed-mobile convergence networks.The performance and bandwidth utilization cannot be balanced well.Aiming at the above-mentioned problems of supporting fixed-mobile convergence services,this paper studies the resource scheduling and optimization mechanism of the access network for fixed-mobile convergence and proposes an access network architecture for fixed-mobile convergence.The specific innovations are as follows:In terms of resource management,this paper proposes a multi-dimensional,cross-layer resource scheduling mechanism for fixed-mobile convergence in access network scene.Faced to the lack of a flexible and unified management mechanism for PON networks,this paper pools the bandwidth resources of different PON devices through a self-developed agent.The "time,wavelength and space" dimensionals joint resources scheduling mechanism enables the bandwidth resources to be flexibly allocated to different services.A cross-layer resources scheduling mechanism is further designed to map the top-level services to the underlying devices to achieve multi-dimensional matching of business requirements with the underlying resources.Based on the above-mentioned management mechanisms,this paper designs FF-GA joint services allocation algorithm,which can effectively reduce the wavelength utilization rate.Under the specific simulation conditions,when deploying new services,compared with randomly deploying services mechanism,this mechanism can reduce the usage of wavelengths by about 23%.In terms of network transmission,this paper proposes an optimized slot allocation mechanism in access networks for fixed-mobile convergence.Aiming to the weak efficient transmission capacity for differentiated QoS services of current PONs,this paper proposes a Sc-DBA time slot allocation mechanism for delay-sensitive services in fixed-mobile convergence.This mechanism shortens the internal delay of the sub-cycle by 1/3,as well as saves network bandwidth resources compared to SBA mechanism.Meanwhile,sub-cycles affect to the network transmission performance of the external cycle little.Then,in order to solve the problem of poor uplink bandwidth jitter performance of the PON network,a pioneering optimization mechanism of PON uplink time slot jitter performance based on Q-learning combination ranking is proposed.Through simulations,this paper shows that the mechanism can reduce the uplink jitter by about 17%without using additional bandwidth resources.Meanwhile,this mechanism considers the actual scenario of the PON network,adds parameters for algorithm to control performance precisely.These mechanisms enable the algorithm to be adjusted to the state most suitable for service requirements according to the specific needs of delay and jitter performance when supporting different types of services.