TCP-aware power control in wireless networks
View Patent ↗A method, system, and medium are provided for controlling power usage in a wireless telecommunications network, the method comprising transmitting a pilot signal to a mobile station over a wireless channel, receiving a response that includes a signal-to-interference-and-noise ratio associated with said pilot signal, determining an instantaneous channel rate to be used for a subsequent data transmission to said mobile station based at least on said signal-to-interference-and-noise ratio, selecting a transmit power level for said data transmission; and transmitting data to said mobile station at said channel rate and said power level.
1. Computer-readable media having computer-executable instructions embodied thereon that, when executed, facilitate a method of controlling power usage in a wireless telecommunications network, the method comprising:
determining a current TCP state;
predicting a future channel state of a wireless channel for communicating to a mobile station;
selecting a transmit power level for a subsequent data transmission to said mobile station based at least on said current TCP state and said future channel state; and
transmitting data to said mobile station at said transmit power level.
2. The media of claim 1 , wherein predicting said future channel state includes:
determining a current channel state of said wireless channel; and
predicting said future channel state based on said current channel state.
3. The media of claim 2 , wherein determining said current channel state includes:
transmitting a pilot signal to a mobile station using the wireless channel;
receiving a response that includes a signal-to-interference-and-noise ratio associated with said pilot signal; and
determining said current channel state based on said signal-to-interference-and-noise ratio.
4. The media of claim 2 , wherein predicting said future channel state includes utilizing a statistical model to predict said future channel state based on said current channel state.
5. The media of claim 4 , wherein said statistical model is a Markov Model.
6. The media of claim 1 , wherein selecting a transmit power level includes selecting said transmit power level based on a tradeoff factor.
7. The media of claim 6 , wherein the tradeoff factor trades off power efficiency for channel utilization.
8. The media of claim 1 , selecting said transmit power level includes selecting said transmit power level on a per-slot basis.
9. The media of claim 1 , wherein selecting said transmit power level includes selecting said transmit power level on a per-round-trip-time basis.
10. The media of claim 1 , wherein said wireless channel communicates data by way of one or more of the following technologies:
CDMA;
GSM;
EVDO;
HSPDA;
LTE;
WiFi; or
WiMax.
11. The media of claim 1 , wherein the current TCP state is a TCP rate.
12. The media of claim 2 , wherein:
the power level is a lower power level than a current power level if said current TCP state includes a queue length that is large and said future channel state is worse than said current channel state; and
the power level is a higher power level than a current power level if said current TCP state includes a queue length that is small and said future channel state is better than said current channel state.
13. A base transceiver station, comprising:
a processing unit; and
a computer-readable media embodied with computer-executable instructions that, when executed, perform the following steps:
determining a current TCP state;
predicting a future channel state of a wireless channel for communicating to a mobile station; and
selecting a transmit power level for a subsequent data transmission to said mobile station based at least on said current TCP state and said future channel state; and
transmitting data to said mobile station at said transmit power level.
14. The base transceiver station of claim 13 , wherein the predicting said future channel state includes:
determining a current channel state of said wireless channel; and
predicting said future channel state based on said current channel state.
15. The base transceiver station of claim 14 , wherein determining said current channel state includes:
transmitting a pilot signal to a mobile station using the wireless channel;
receiving a response that includes a signal-to-interference-and-noise ratio associated with said pilot signal; and
determining said current channel state based on said signal-to-interference-and-noise ratio.
16. The base transceiver station of claim 15 , wherein predicting said future channel state includes utilizing a statistical model to predict said future channel state based on said current channel state.
17. The base transceiver station of claim 16 , wherein said statistical model is a Markov Model.
18. Computer-readable media having computer-executable instructions embodied thereon that, when executed, facilitate a method of controlling power usage in a wireless telecommunications network, the method comprising:
determining a current TCP state;
transmitting a pilot signal to a mobile station using the wireless channel;
receiving a response that includes a signal-to-interference-and-noise ratio associated with said pilot signal;
determining a current channel state based on said signal-to-interference-and-noise ratio;
predicting a future channel state of a wireless channel for communicating to a mobile station based on said current state and a Markov Model;
selecting a transmit power level for a subsequent data transmission to said mobile station based at least on said current TCP state, said future channel state, and a trade-off factor; and
transmitting data to said mobile station at said transmit power level.
19. The media of claim 18 , wherein selecting a transmit power level includes selecting said transmit power level based on a tradeoff factor.
20. The media of claim 18 , wherein said wireless channel communicates by way of one or more of the following technologies:
CDMA;
GSM;
EVDO;
HSPDA;
LTE;
WiFi; and
WiMax.