Forward link power control
View Patent ↗A wireless device is configured with a power control parameter having a first value. The first power control parameter determines whether the wireless device requests an increase in transmit power from a base station. A profile is determined to be associated with the wireless device. An indicator selecting a multi-antenna mode is received from the wireless device. Based on the profile and the indicator, the wireless device is configured with the power control parameter having a second value.
1. A method of operating a communication system, comprising:
receiving, from a wireless device associated with a first quality of service profile, an indicator selecting a first multi-antenna mode;
determining the wireless device is associated with the first quality of service profile; and,
based on the indicator and the first quality of service profile, transferring from a base station a power control parameter to the wireless device, wherein the power control parameter is associated with a closed-loop power control process of the wireless device;
responsive to a request for increased transmit power received from the wireless device, increasing transmit power from the base station to the wireless device, wherein the wireless device selects a second multi-antenna mode responsive to increasing the transmit power from the base station.
2. The method of claim 1 , wherein the request for increased transmit power is based on an indicator of an energy per bit to noise ratio (Eb/No) satisfying a criteria.
3. The method of claim 2 , wherein the criteria is based on an Eb/No setpoint and the Eb/No setpoint is increased based on the indicator and the first quality of service profile.
4. The method of claim 1 , wherein the request for increased transmit power is based on an indicator of a frame error rate (FER) satisfying a criteria.
5. The method of claim 4 , wherein the criteria is based on a FER setpoint and the FER setpoint is decreased based on the indicator and the first quality of service profile.
6. The method of claim 1 , wherein the first multi-antenna mode comprises operating the wireless device in a space-time coding MIMO mode.
7. A method of operating a communication system, comprising:
configuring a wireless device with a power control parameter having a first value, wherein the first power control parameter is associated with a closed-loop power control process of the wireless device that determines whether the wireless device requests an increase in transmit power from a base station;
determining a quality of service profile associated with the wireless device;
receiving an indicator selecting a first multi-antenna mode from the wireless device; and,
based on the quality of service profile and the indicator, configuring the wireless device with the power control parameter having a second value, wherein the wireless device selects a second multi-antenna mode responsive to the second value.
8. The method of claim 7 , wherein the power control parameter determines a maximum Eb/No setpoint.
9. The method of claim 7 , wherein the power control parameter determines a minimum Eb/No setpoint.
10. The method of claim 7 , wherein the power control parameter determines a target frame error rate (FER).
11. The method of claim 7 , wherein the second value causes the wireless device to increase an Eb/No setpoint used by the wireless device to determine whether to send a request of increased transmit power.
12. The method of claim 7 , wherein the second value causes the wireless device to decrease an Eb/No setpoint used by the wireless device to determine whether to send a request of increased transmit power.
13. The method of claim 7 , further comprising:
based on the profile and the indicator, configuring the base station to respond with larger incremental changes in transmit power in response to requests for an increase in transmit power and requests for a decrease in transmit power from the wireless device.
14. The method of claim 7 , wherein the first multi-antenna mode comprises operating the wireless device in a space-time coding MIMO mode.
15. The method of claim 7 , wherein the first multi-antenna mode comprises operating the wireless device in a MIMO mode wherein a data stream is split into multiple lower rate data streams and each data stream is transmitted from a different transmit antenna in the same frequency channel.
16. A method of operating a wireless device, comprising:
sending the wireless device a first configuration associated with a closed-loop power control process of the wireless device;
determining the wireless device is operating in a first multi-antenna mode;
determining the wireless device is associated with a first quality of service profile; and,
based on the wireless device operating in the first multi-antenna mode, and the wireless device being associated with the first quality of service profile, sending the wireless device a second configuration, wherein the wireless device selects a second multi-antenna mode responsive to the second configuration.
17. The method of claim 16 , wherein an Eb/No setpoint is changed between the first configuration and the second configuration.
18. The method of claim 16 , wherein the first multi-antenna mode comprises operating the wireless device in a space-time coding MIMO mode.
19. The method of claim 16 , wherein the first multi-antenna mode comprises operating the wireless device in a MIMO mode wherein a data stream is split into multiple lower rate data streams and each data stream is transmitted from a different transmit antenna in the same frequency channel.