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INTRODUCTION The Transport Control Protocol (TCP) pro-vides end-to-end reliable connection-oriented ser-vice over heterogeneous networks. After the fa-mous 1986 network collapse due to network con-gestion, TCP congestion control mechanisms wereintroduced in TCP protocol. The congestion controlmechanisms in early TCP, known as TCP-Tahoe,are discussed in Congestion Avoidance and Control(Jacobson, 1988). Tahoe introduces two basicmechanisms: slow start and congestion avoidance… 相似文献
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With the evolution of network technologies,the deficiencies of TCP protocol are becoming more and more distinct. The new TCP implementation,called Receiver Advertisement Based TCP(TCP-Rab)proposed here to eliminate these deficiencies,adopts two basic mechanisms:(1)Bandwidth Estimation and(2)Immediate Recovery. Bandwidth estimation is carried out at the receiver,and the result is sent back to the sender via the acknowledgments. Immediate Recovery guarantees high performance even in lossy link. Rab can distinguish the reason for packet loss,and thus adopt appropriate recovery strategy. For loss by network congestion,it will back off its congestion window,and for loss by link errors,it will recover the congestion window immediately. Simulations indicated that Rah has superiority over other TCP implementations. 相似文献
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