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 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, 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. Non-transitory 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:
transmitting a pilot signal to a mobile station using 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, the transmit power level selected based at least on a length of a transmission queue, wherein:
(1) the transmit power level is a higher power level if the transmission queue length is below a predetermined threshold length, wherein the higher power level is selected to be full power, and
(2) the transmit power level is a lower power level if the transmission queue length is above the predetermined threshold length, wherein the lower power level is selected to be a lowest power level such that an expected transmission error rate remains below a predetermined maximum transmission error rate; and
transmitting data to said mobile station at said channel rate and said transmit power level.
2. The media of claim 1 , wherein said wireless channel carries one or more of the following:
CDMA traffic;
GSM traffic;
EVDO traffic;
HSPDA traffic;
LTE traffic;
WiFi traffic; and
WiMax traffic.
3. The media of claim 1 , wherein the queue is a TCP queue.
4. The media of claim 1 , wherein said predetermined threshold length is one-half of a maximum length for said queue.
5. The media of claim 1 , wherein
the power level is a higher power level if said queue length is below a first predetermined threshold length;
the power level is an intermediate power level if said queue length is above said first predetermined threshold length but below a second predetermined threshold length; and
the power level is a lower power level if said queue length is above said second predetermined threshold.
6. The media of claim 5 , wherein
said higher power level is chosen to be full power;
said lower power level is chosen to be a lowest power level such that an expected transmission error rate remains below a predetermined maximum transmission error rate; and
said intermediate power level is chosen to be lower than said higher power level and higher than said lower power level.
7. The media of claim 5 , wherein
said first predetermined threshold length is one-half of a maximum length for said queue; and
said second predetermined threshold length is one-quarter of a maximum length for said queue.
8. The media of claim 5 , wherein
said first predetermined threshold length is two-thirds of a maximum length for said queue; and
said second predetermined threshold length is one-third of a maximum length for said queue.
9. Non-transitory 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:
selecting a transmit power level for a data transmission to a mobile station based on a length of a transmission queue, wherein:
(1) the transmit power level is a higher power level if the transmission queue length is below a predetermined threshold length, wherein the higher power level is selected to be full power, and
(2) the transmit power level is a lower power level if said queue length is above the predetermined threshold length, wherein the lower power level is selected to be a lowest power level such than an expected transmission error rate remains below a predetermined maximum transmission error rate; and
transmitting data from said queue to said mobile station at said power level.
10. The media of claim 9 , wherein said queue is a TCP queue.
11. The media of claim 9 , wherein said predetermined threshold length is one-half of a maximum length for said queue.
12. A base transceiver station that performs a method of 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 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;
selecting a transmit power level for said data transmission, the transmit power level selected based on the length of a TCP queue, wherein:
(1) the transmit power level is selected to be full power if the TCP queue length is below a predetermined threshold length, the predetermined threshold length comprising one-half of a maximum length for the TCP queue, and
(2) the transmit power level is selected to be at a lowest power level such that an expected transmission error rate remains below a predetermined maximum transmission error rate if the TCP queue length is above the predetermined threshold length; and
transmitting data to said mobile station at said channel rate and said power level.