Dissertation > Excellent graduate degree dissertation topics show

Research on Enhancement of TFMCC Protocol in High Ber Links

Author: LiuSuLi
Tutor: YangXiaoKang；SongLi
School: Shanghai Jiaotong University
Course: Signal and Information Processing
Keywords: TFMCC Multicast Congestion Control Single-rate BER
CLC: TN915.02
Type: Master's thesis
Year: 2009
Downloads: 1
Quote: 1
Read: Download Dissertation

Abstract


Multicast transmission is a promising application of network transmission technology, it can greatly improve network communications-many transmission rate. Multicast technology can be applied to content distribution, streaming, online gaming, video conferencing and distance education, but they alone network layer multicast support can not meet the needs of these applications, it built on the basis of IP multicast multicast transmission layer protocol has been widespread concern. However, the lack of an effective congestion control algorithms for multicast transport protocol may cause network congestion collapse and not widely used. This paper discusses the current Internet, multicast congestion control techniques. In the current mainstream multicast congestion control algorithm, TFMCC is based on a single rate, and it has good fairness and stability advantages, suitable for TCP-friendly multimedia transmission. However, TFMCC in transmitting real-time streaming link will lead to oscillations, for this problem, we propose an improved algorithm ETFMCC. ETFMCC in TFMCC based on the use of TCP-friendly AIMD-based dynamic flow control algorithm and the LDA algorithm, the sender rate adjustment steps for a smooth, overcoming link flapping, and has the lowest transmission rate guarantee, which makes video streaming applications to maintained at a minimum level of tolerance, maintaining its availability. NS2 simulation results show that the algorithm can better address the link oscillation problems, meet protocol fairness and TCP-friendly. Although ETFMCC wired network protocol has a good performance, but if applied directly to a high TFMCC protocol wireless network error rate, its performance will be greatly decreased, there significant throughput degradation and jitter increases and so the transmission rate problem. In this paper, on the basis of the ETFMCC presents a high error channel loss event on statistical algorithms ETFMCC Veno, in order to enhance the wireless transmission TFMCC agreement on adaptability. The improved algorithm uses network measurements distinguish between random error and congestion loss when loss event statistic does not exceed the loss threshold, the link state usually allows multicast sessions to maintain the original transmission rate for congestion avoidance algorithm prevents TFMCC, which avoids transmission performance degradation. While the system is in steady state (long-term no packet loss), the algorithm by adjusting historical loss event interval on the current impact of network packet loss rate, to address the ETFMCC algorithm itself introduced the case of sudden loss caused by excessive transmission rate jitter big problem in the further smooth sending rate, while done with TCP flows equitably shared bandwidth. This algorithm is only achieved at the receiver, maintaining the original TFMCC scalability and adaptability. In this paper, NS2 simulation platform has been improved performance of the method validation. Simulation results verify the improved TFMCC channel at high bit error, there is a more stable transmission rate and higher throughput, while ensuring its scalability. Finally, the paper of the future research directions.

Related Dissertations

  1. Research of Multicast Protocol in Wireless Sensor Networks,TN929.5
  2. Research on Reliable Multicast Protocol and It’s Buffer Management,TP393.04
  3. Chinese freshwater planarian classification and karyotype studies (Ⅺ),X174
  4. Applied Research and Deployment Design of Campus Multimedia Based on Multicast Technology,TP393.18
  5. Research of Hybrid Application Layer Multicast Model Based on Load-balance,TP393.02
  6. Research on the Key Management Scheme in Secure Multicast for Wimax,TN918.82
  7. Dynamic network coding based on a high-speed multi-path multicast MANET technology research,TN929.5
  8. The Design and Implementation of Client-side System for Group Key Management,TP393.08
  9. The Design and Realization about the Secure Video Multicast Key Management System Based on Chinese Remainder Theorem,TP393.08
  10. Based on the design of P2P streaming media service platform and Implementation,TN919.8
  11. Broadband Access Network,TN915.6
  12. The Improvement of TCP Vegas Algorithm Based on Explicit Congestion Notification,TP393.06
  13. Research on Application of IPv6 Based on Cloud Computing,TP393.04
  14. The Congestion Control Algorithms of Large-Delay Networks,TP393.06
  15. Research and Application of Hierarchical Data Processing in Multicast Key Management,TP309.7
  16. The Design and Research of Secure Communication about COP,TN919.2
  17. Research on the Algorithm for Distributed QoS Multicast Routing with Uncertain Condition,TN915.02
  18. On Congestion Control Mechanism and Algorithm for TCP/IP Networks,TN915.06
  19. Jiuquan producing digital command center monitoring system design and implementation,TP277
  20. Reduce congestion rate and support resources balanced use of new optical networking research,TN929.1
  21. The Research of TCP Congestion Control Mechanisms in Satallite Networks,TN927.2

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication network > General issues > Communication network structure and design
© 2012 www.DissertationTopic.Net  Mobile