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Android Change TCP Congestion Control

androidIT知识Congestion

逆水行舟用力撑，一篙松劲退千寻。这篇文章主要讲述Android Change TCP Congestion Control相关的知识，希望能为你提供帮助。
I The need of Change TCP Congestion Control in android
" TCP was originally designed for wired networks. Packet loss is considered to be the result of  network congestion  and the congestion window size is reduced dramatically as a precaution. However, wireless links are known to experience sporadic and usually temporary losses due to fading, shadowing, hand off,  interference, and other radio effects, that are not strictly congestion. After the (erroneous) back-off of the congestion window size, due to wireless packet loss, there may be a congestion avoidance phase with a conservative decrease in window size. This causes the radio link to be underutilized. Extensive research on combating these harmful effects has been conducted. Suggested solutions can be categorized as end-to-end solutions, which require modifications at the client or server,[41]  link layer solutions, such as Radio Link Protocol (RLP) in cellular networks, or proxy-based solutions which require some changes in the network without modifying end nodes.[41][42]
A number of alternative congestion control algorithms, such as  Vegas,  Westwood, Veno, and Santa Cruz, have been proposed to help solve the wireless problem.[citation needed] "

                                                                                                                                                                                                                                                                                                                                                                                          -- From WIKIPEDIA
http://forum.xda-developers.com/showpost.php?p=28152737& postcount=2
and
http://forum.xda-developers.com/showpost.php?p=48088128& postcount=1884
Have listed differences between these control algorithms in Android.
【Android Change TCP Congestion Control】 
II Step
      config linux kernel to build All TCP Congestion Module -> add busybox to android -> sysctl -w net.ipv4.tcp_congestion_control=cubic


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