(→Congestion window and RTT evolutions) |
(→TCP Congestion Control Algorithms over a live HSDPA Network) |
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Riga 28: | Riga 28: | ||
* In the case of the uplink channel the algorithms exhibited similar performances, due to the fact that the moderate size of cwnd forced TCP Cubic and TCP Bic to use the linear probing in order to be TCP friendly (see [http://netsrv.csc.ncsu.edu/export/cubic_a_new_tcp_2008.pdf [1]]). | * In the case of the uplink channel the algorithms exhibited similar performances, due to the fact that the moderate size of cwnd forced TCP Cubic and TCP Bic to use the linear probing in order to be TCP friendly (see [http://netsrv.csc.ncsu.edu/export/cubic_a_new_tcp_2008.pdf [1]]). | ||
− | + | ==Results of the investigation== | |
We report cumulative distribution function plots: | We report cumulative distribution function plots: | ||
* [[Tcp_over_Hsdpa:goodput_downlink | downlink]] and [[Tcp_over_Hsdpa:goodput_uplink | uplink]] channel goodput CDFs | * [[Tcp_over_Hsdpa:goodput_downlink | downlink]] and [[Tcp_over_Hsdpa:goodput_uplink | uplink]] channel goodput CDFs |
We report results obtained by an extensive measurement campaign over a live HSDPA network involving more than 3000 flows resulting in around 60 hours of active measurements. The considered TCP variants are the following:
The experimental evaluation has been carried out by accessing the public Internet using a commercial HSDPA card (see figure below).
The following instantaneous variable measurements have been collected by using the libnetmeas library:
The main findings of the investigation can be summarized as follows:
We report cumulative distribution function plots:
Typical congestion window and RTT evolutions of the considered TCPs in the case of a single flow over the HSDPA downlink
We report results obtained by an extensive measurement campaign over a live HSDPA network involving more than 3000 flows resulting in around 60 hours of active measurements. The considered TCP variants are the following:
The experimental evaluation has been carried out by accessing the public Internet using a commercial HSDPA card (see figure below).
The following instantaneous variable measurements have been collected by using the libnetmeas library:
The main findings of the investigation can be summarized as follows:
We report cumulative distribution function plots:
Typical congestion window and RTT evolutions of the considered TCPs in the case of a single flow over the HSDPA downlink