||Energy Efficient Client-centric Shaping of Multi-flow TCP Traffic
||Raja, Ahmad Nazir
||Probst, Christian W. (Language-Based Technology, Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Sjödin, Peter (KTH Computer Science and Communication)
||Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
||With the explosion of mobile devices, there is a pressing need to explore optimal
ways of battery consumption. One of the widely used mechanisms for energy
conservation is the IEEE 802.11b Power Save Mode (PSM). The mechanism
suggests that the wireless interface should be transitioned to a low power, sleep
state when idle. PSM needs infrastructure support and studies have shown that
it adversely affects the throughput in some cases. Other than using PSM, there
are various power saving mechanisms that either suggest a trade-o between
performance and energy consumption, propose usage of power aware protocols
or require additional infrastructure support. We have implemented a modified
version of the client-centric PSMT protocol which is capable of minimizing energy
consumption while maintaining the throughput. The protocol works by
exploiting the TCP
ow-control mechanism and our implementation can be
deployed without changing the existing TCP functionality. Furthermore, the
client-centric nature of the protocol enables easy deployment of the solution.
The protocol is application independent but is targeted for bulky TCP transfers.
Our solution can be used on Linux based systems and is kept portable as
it can be deployed with different wireless devices without major modications.
We have tested our solution with real web-servers and our results show that
the protocol can achieve upto 80%, 65% and 45% savings for one, two and four
active connections respectively.
||Technical University of Denmark (DTU) : Kgs. Lyngby, Denmark
Creation date: 2010-07-09
Update date: 2010-07-09