[Bloat] Tackling bufferbloat in 3G/4G networks: A receiver-based TCP solution.

[Haiqing Jiang]

Hi, All,

Recently the researchers from Networking Research Group of North Carolina
State University (NCSU) have proposed an interesting receiver-based TCP
solution to tackle bufferbloat in 3g/4g networks.

They conducted extensive measurements in four major carriers in US and the
largest carrier in Korea to verify the severe bufferbloat problem in
currently commercial cellular networks. They cited the
work from Bufferbloat group and further extended the work to cellular
networks. Furthermore, they revealed the untold implementation of TCP, an
ad-hoc solution to mitigate bufferbloat, in smartphone's network stack
(Android platform). The ad-hoc solution is sub-optimal in many scenarios.
Actually it merely mitigate bufferbloat problem in some scenarios.
Therefore, the guys from NCSU propose a "Dynamic Receive Window Adjustment"
scheme to tackle bufferbloat problem. The extensive experiment results
prove that the scheme is efficient and light-weight.

It's really excited to find the new direction to tackle bufferbloat, on TCP
layer instead of routers (like AQM). The bufferbloat problem actually seems
to be the most prominent, comparing with other networks.
Therefore, we suggest the more efforts to tackling bufferbloat problem in
cellular networks and seeking a good solution in TCP layer space.

The link is attached:
ftp://ftp.ncsu.edu/pub/unity/lockers/ftp/csc_anon/tech/2012/TR-2012-6.pdf

Thanks,

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