Research On The Multipath Resquencing Technology For Fiber-wireless Integrated Network Based On NFV

With the increase of Internet users and business,the performance requirements on data transmission is also rising.Fiber access or wireless access has been unable to meet the users on high bandwidth and high flexibility access.Fiber and wireless network(FiWi)is consist of the optical fiber network and the wireless networks,which belong to hybrid network,effectively combines the advantages of both,provides users with a high bandwidth,high quality,high flexibility access.Bandwidth achieved only by increasing the number of fiber optic cable and physical devices such as routing,is far from adequate to meet the demands of people.Traditional single-path transmission is considered to be the bottleneck of access network bandwidth increases.Multipath transport can accelerate the transmission of data flow,reduces network congestion and delay.But for the Fiber and wireless access network,multipath may lead to data out of order.This thesis will research the multipath re-sequence technique on the basis of network virtualization,thus shielding the heterogeneity of the underlying infrastructure.We use NFV as the virtualization mode,and come up with the networking scheme and experimental validation.Main contents and innovations are as follows:(1)For fiber and wireless network in the data flow of multipath transmission and data re-sequence,we proposed a fiber and wireless network group network scheme based on NFV,including system framework design and networking scheme design.We designed the main function module,including fiber and wireless network node and network hardware and software structure.At last we proposed the process and realization scheme of multipath transmission and data re-sequence based on the fiber and wireless network.(2)We analyzed and compared the existing fiber and wireless access network paths reorder technologies,presented an improved sorting algorithm(MLFRA)aimed at do the best on the time and space complexity,network delay,and the network throughput performance.The algorithm can be adjusted to meet the needs of data flow on different performance.(3)We simplify the integration scenarios of access network in a lab environment,using OPNFV for network virtualization,embedding multipath transmission and data re-sequence algorithm in a virtual machine.In complex environments,we compared the network parameter by simulating network data re-sequence algorithm with Matlab.In the end we summarized this thesis;and looked into the development prospects of fiber and wireless network and multipath re-sequence technology.