CAJ | 학술논문

在数据中心网络中,当多个服务器同时向一个接收端发送数据时,产生的数据流量易在瓶颈交换机的缓冲区溢出,造成丢包事件以及数据重传,导致TCP Incast问题。为此,提出一种可快速反馈的数据中心网络传输控制协议( FFDTCP)。该协议在TCP协议的基础上采用显式拥塞通知机制,利用2个显式拥塞通知位通告4种拥塞级别,发送端根据拥塞信息所表示的拥塞级别快速调整拥塞窗口以减少拥塞,从而避免因瓶颈链路丢包而造成的吞吐量急剧下降问题。 NS2仿真实验结果表明,与传统TCP协议相比,FFDTCP协议可以保证较低的时延和较大的吞吐量,有效缓解TCP Incast问题,提高数据中心网络传输性能。
재수거중심망락중,당다개복무기동시향일개접수단발송수거시,산생적수거류량역재병경교환궤적완충구일출,조성주포사건이급수거중전,도치TCP Incast문제。위차,제출일충가쾌속반궤적수거중심망락전수공제협의( FFDTCP)。해협의재TCP협의적기출상채용현식옹새통지궤제,이용2개현식옹새통지위통고4충옹새급별,발송단근거옹새신식소표시적옹새급별쾌속조정옹새창구이감소옹새,종이피면인병경련로주포이조성적탄토량급극하강문제。 NS2방진실험결과표명,여전통TCP협의상비,FFDTCP협의가이보증교저적시연화교대적탄토량,유효완해TCP Incast문제,제고수거중심망락전수성능。
In Data Center Network(DCN),Transmission Control Protocol(TCP) Incast occurs frequently when multiple servers send data to the same receiving end in parallel. Data traffic overflows the buffer at the bottleneck switch,leading to packet losses and subsequently TCP retransmissions. To solve TCP Incast problem, this paper presents TCP with fast feedback in DCN( FFDTCP) . The congestion control algorithm of FFDTCP is based on Explicit Congestion Notification ( ECN) and uses two bits to indicate four levels of congestion degree,then senders adjust congestion window according to the congestion information to achieve the purpose of reducing congestion and avoiding bottleneck link packet loss,leads to a sharp decline in throughput problem. NS2 simulation result shows that the algorithm can guarantee lower latency and higher throughput,effectively mitigate the TCP Incast problem and improve the transmission performance of DCN.