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With the continuous development of network and communication technology , and how reasonable and effective use of network resources for existing networks , especially the Internet , has a vital role . Widely used in the Internet Protocol TCP / IP protocol suite , TCP protocol , the congestion control mechanism is the most critical , the most important elements . After years of research scholars and Practice , TCP has been very mature, but TCP earliest data - oriented business , and thus there are still some deficiencies , for example : For a different source - end path unfair to link occupancy rate ; stability is not high , because of the congestion window changes jitter is too large, can not meet the customers demanding real-time video and voice signal transmission , and thus can not meet the growing Internet multimedia streaming media business in particular growth needs . The ecosystem has many excellent characteristics, such as the current system does not have the network : high stability , adaptability , survivability and self-recovery and so on . Therefore, the thesis for TCP congestion control mechanisms are inadequate , to borrow a biological control method study exploring a new type of network congestion control mechanism , including specific work : First, the analysis and research of the impact of the sender network congestion window size impact factor the relationship between the congestion window , and these relationships with biological systems in continuous cultures of microorganisms and predation, competition , symbiotic relationship between the species were analyzed . A mathematical model based on a combination of biological network congestion control mechanism , making the network also has excellent characteristics of the biological system . Second, in order to overcome the mentioned congestion control mechanisms in the regulation of the lack of congestion window , try to use only with the symbiotic relationship of the food chain , but adjusted to the food chain of the symbiotic relationship between the biological mathematical model , and the corresponding improvement the application of the improved program to describe the intrinsic relationship between the network variables . So that the network has a good stability, fairness , and avoid the occurrence of network congestion .
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