Research And Design Of MAC Mechanisms Of 10 Gigabit Coaxial Broadband Access System

With the implementation of China's Broadband Strategy and the acceleration of the fiber-optic deployment process of backbone networks,the progress of access network technology has become a key factor promoting the development of cable broadband networks.The cable coaxial network,as an important component of national information infrastructure,should be fully utilized to exert its academic and economic value.HINOC access solution is a new type of EOC access solution with complete independent intellectual property rights,which is developed for the characteristics of cable coaxial network in China,and has reached Gigabit access capability.However,with the development of large-bandwidth and low-latency services such as 4K / 8K and VR / AR,the demand for diversified service experience is increasingly growing.Therefore,the research and development of 10 Gigabit coaxial broadband access technology standards will be the trend of the times.The main work of this thesis is divided into the following three parts: designing and proposing a 10 Gigabit coaxial broadband access system MAC layer solution that meets the coaxial characteristics,implementing the 10 Gigabit coaxial broadband access MAC layer simulation system,and verifying the rationality and correctness of 10 Gigabit coaxial broadband access system MAC layer solution through simulation analysis.First of all,we study the HINOC2.0 technical standard,further we research and analyze the various indicators of 10 Gigabit coaxial broadband access technology,and we design the 10 Gigabit coaxial broadband access system MAC layer overall solution,including the partition of the MAC layer structure,the frame type and the frame structure of the MAC layer,the partition of Pd period and MAP period.Based on practical application requirements,a multi-channel binding mechanism and multi-profile transmission mode are proposed,as well as a node admission mechanism which based on competitive ordering.Subsequently,the 10 Gigabit coaxial broadband access MAC layer simulation system is implemented based on the MAC layer protocol simulation platform,including the internal logic structure of HB and HM,the planning of Pd period and MAP period,the data transmission mechanism,as well as the concrete implementation of the multi-channel binding mechanism,the multi-profile transmission mode and the node admission mechanism which based on contention ordering.Finally,the performance indexes of the 10 Gigabit coaxial broadband access system MAC layer solution are simulated and analyzed.The simulation results show that the scheme can meet the requirements of 10 Gigabit coaxial broadband access technology on system throughput,average delay and delay jitter,bandwidth distribution granularity,spectrum efficiency and channel utilization rate,etc.Multi-channel binding mechanism can allocate channel resources to nodes in a more fine-grained way when high-bandwidth and low-bandwidth users coexist in the system,thus effectively avoiding resource waste.The multi-profile transport mechanism can statistically multiplex the downlink data,thus reducing the downlink transmission delay.The node admission mechanism can effectively reduce the collisions of nodes when competing for admission opportunities,and multiple HM nodes can be accepted sequentially through one competition,thus avoiding the time waste caused by multiple competitions.In general,the 10 Gigabit coaxial broadband access system MAC layer solution is able to achieve 10 Gigabit access rate,and has the advantages of ultra-low delay,ultra-high spectral efficiency and ultra-fine bandwidth allocation granularity,which can provide a reference for the later development of 10 Gigabit coaxial broadband access technology standards.