Research On Data Disorder Problem Of Receiver Based On SCTP-CMT

With the development of network, multi-streaming and multi-homing network environment is becoming increasingly popular, making the existing transport layer protocol can not be well positioned to meet the increasing transmission requirements, Stream Control Transmission Protocol instead of Transmission Control Protocol and User Datagram Protocol become the next generation of Internet transport protocols has become an inevitable trend. To be able to make better use of network resources, aggregate bandwidth and improve network throughput, on the basis of SCTP, the researchers proposed a concurrent multipath transfer technology, which by extension multi-homing features of SCTP to achieve many parallel data transmission of end-to-end path, to achieve flexible and efficient use of target of heterogeneous network resources. However, due to the bandwidth of path, dynamic changes of delay caused receiver data disorder affecting the performance of SCTP-CMT, therefore, research the receiver data disorder has important theoretical significance and application value.First of all, starting from the standard SCTP, SCTP and SCTP-CMT technology research status at home and abroad are analyzed, and analyzes its support and restrictions on the CMT, analyzes the reasons for the receiver the data generated out of order, influence and existing solutions. On this basis, considering the dynamic changes of end to end path available bandwidth and propagation delay, a data scheduling algorithm based on feedback and M/G/1 structure is persented, the algorithm by analyzing the path available bandwidth, the sub-service flow on each transmission path equivalent to an M/G/1 queuing model, while use of the feedback information of path and business flow allocation method shunt and data scheduling on business flow at the transmitting end, to maximum solve the problem of receiver data out of order. Before making data scheduling algorithm based on feedback and M/G/1 structure, in order to directly reflect the ideas of feedback presented data scheduling algorithm based on feedback, the algorithm considers the dynamic path of propagation delay, through the feedback information of the path propagation delay to dynamically adjust the path parameters, while at the sending end make reasonable dispatch of the data.In order to verify the rationality and effectiveness of the proposed algorithm, NS-2 software is used for simulation. In the simulation, the occupancy size of receive buffer and disorder length are used as the primary performance indicators, at the same time do comparison with the design of algorithm and the original algorithm. The simulation results show that:in the path delay and bandwidth changes dynamically, data scheduling algorithm based on feedback and M/G/1 structure can effectively reduce the data disorder of the receiver, improves the efficiency of end-to-end transmission.Finally, the subject of the work is summarized, and the future research directions are prospected.