太赫兹科学与电子信息学报
太赫玆科學與電子信息學報
태혁자과학여전자신식학보
Information and Electronic Engineering
2015年
2期
308-311
,共4页
博弈论%对等系统%自回归模型%用户行为
博弈論%對等繫統%自迴歸模型%用戶行為
박혁론%대등계통%자회귀모형%용호행위
game theory%Peer to Peer system%Auto-Regressive model%user behavior
长期对等(P2P)系统中的搭便车行为使得系统渐渐失去了原来分布式共享的特点。为了抑制这种行为，提出了一种新的P2P系统评价模型。该模型基于博弈论抑制模型和节点行为的激励模型的特点，对用户行为采用信誉值进行评价，信誉值的表征体现用户阶段性的表现，并采取一定的限制抑制自私节点的产生。将该模型内的各种激励机制进行数学建模，并利用自回归(AR)模型进行拟合。仿真结果表明，在该模型下，系统的评价呈周期性变化，满意度趋于平稳，在30%左右。
長期對等(P2P)繫統中的搭便車行為使得繫統漸漸失去瞭原來分佈式共享的特點。為瞭抑製這種行為，提齣瞭一種新的P2P繫統評價模型。該模型基于博弈論抑製模型和節點行為的激勵模型的特點，對用戶行為採用信譽值進行評價，信譽值的錶徵體現用戶階段性的錶現，併採取一定的限製抑製自私節點的產生。將該模型內的各種激勵機製進行數學建模，併利用自迴歸(AR)模型進行擬閤。倣真結果錶明，在該模型下，繫統的評價呈週期性變化，滿意度趨于平穩，在30%左右。
장기대등(P2P)계통중적탑편차행위사득계통점점실거료원래분포식공향적특점。위료억제저충행위，제출료일충신적P2P계통평개모형。해모형기우박혁론억제모형화절점행위적격려모형적특점，대용호행위채용신예치진행평개，신예치적표정체현용호계단성적표현，병채취일정적한제억제자사절점적산생。장해모형내적각충격려궤제진행수학건모，병이용자회귀(AR)모형진행의합。방진결과표명，재해모형하，계통적평개정주기성변화，만의도추우평은，재30%좌우。
Long-term free-riding behavior of Peer to Peer(P2P) systems makes the system gradually lose its original distributed shared characteristics. In order to prevent selfish behaviors, a new evaluation model for P2P systems is proposed based on the characteristics of game theory suppression model and incentive-based node behavior model. The reputation value which reflects the period performance of users is adopted to characterize user-behavior, and some confinement conditions are set to prevent generating selfish nodes. The various kinds of incentive mechanisms in P2P systems are mathematically modeled and fitted with Auto-Regressive(AR) model. The simulation results based on this model show that the behavior of the system evaluation changes periodically;and the satisfaction is stabilized to a smooth number, 30%.
