Wireless communication transmit power control based on hybrid automatic repeat request (HARQ) block error rate (BLER)
A Fifth Generation New Radio (5GNR) User Equipment (UE) controls power consumption. In the 5GNR UE, control circuitry selects an initial 5GNR transmit power and signals the initial 5GNR transmit power to a 5GNR radio. The 5GNR radio transmits initial 5GNR signals at the initial 5GNR transmit power. The control circuitry identifies an excessive Uplink (UL) Hybrid Automatic Repeat Request (HARQ) Block Error Rate (BLER), and in response, selects a lower 5GNR transmit power and signals the lower 5GNR transmit power to the 5GNR radio. The 5GNR radio transmits subsequent 5GNR signals at the lower 5GNR transmit power. The UL HARQ BLER may be for a Long Term Evolution (LTE) access node.
1. A method of operating a Fifth Generation New Radio (5GNR) User Equipment (UE) to control power consumption, the method comprising:
control circuitry selecting an initial 5GNR transmit power and signaling the initial 5GNR transmit power to a 5GNR radio;
the 5GNR radio transmitting initial 5GNR signals at the initial 5GNR transmit power;
the control circuitry identifying an excessive Uplink (UL) Hybrid Automatic Repeat Request (HARQ) Block Error Rate (BLER), and in response, selecting a lower 5GNR transmit power and signaling the lower 5GNR transmit power to the 5GNR radio; and
the 5GNR radio transmitting subsequent 5GNR signals at the lower 5GNR transmit power.
2. The method of claim 1 wherein the control circuitry identifying the excessive UL HARQ BLER comprises averaging the UL HARQ BLER for an error sampling period, comparing the average UL HARQ BLER for the error sampling period to an error threshold, and detecting when the average UL HARQ BLER for the error sampling period exceeds the error threshold.
3. The method of claim 2 wherein the error sampling period is greater than 90 milliseconds.
4. The method of claim 1 wherein the UL HARQ BLER comprises UL HARQ BLER for a Long Term Evolution (LTE) access node.
5. The method of claim 1 further comprising the control circuitry identifying excessive UL path loss and wherein the control circuitry selecting the lower 5GNR transmit power and signaling the lower 5GNR transmit power to the 5GNR radio comprises selecting the lower 5GNR transmit power and signaling the lower 5GNR transmit power to the 5GNR radio in response to the excessive UL HARQ BLER and the excessive UL path loss.
6. The method of claim 5 wherein the control circuitry identifying the excessive UL path loss comprises averaging the UL path loss for a loss sampling period, comparing the average UL path loss for the loss sampling period to a loss threshold, and detecting when the average UL path loss for the loss sampling period exceeds the loss threshold.
7. The method of claim 6 wherein the loss sampling period is greater than 90 milliseconds.
8. The method of claim 5 wherein the UL path loss comprises UL path loss for a Long Term Evolution (LTE) access node.
9. The method of claim 1 wherein the control circuitry comprises a 5GNR Radio Resource Control (RRC).
10. The method of claim 1 wherein the control circuitry comprises a 5GNR Media Access Control (MAC).
11. A Fifth Generation New Radio (5GNR) User Equipment (UE) that controls power consumption, the 5GNR UE comprising:
control circuitry configured to select an initial 5GNR transmit power and signal the initial 5GNR transmit power to a 5GNR radio;
the 5GNR radio configured to transmit initial 5GNR signals at the initial 5GNR transmit power;
the control circuitry configured to identify an excessive Uplink (UL) Hybrid Automatic Repeat Request (HARQ) Block Error Rate (BLER), and in response, select a lower 5GNR transmit power and signal the lower 5GNR transmit power to the 5GNR radio; and
the 5GNR radio configured to transmit subsequent 5GNR signals at the lower 5GNR transmit power.
12. The 5GNR UE of claim 11 wherein the control circuitry is configured to average the UL HARQ BLER for an error sampling period, compare the average UL HARQ BLER for the error sampling period to an error threshold, and detect when the average UL HARQ BLER for the error sampling period exceeds the error threshold to identify the excessive UL HARQ BLER.
13. The 5GNR UE of claim 12 wherein the error sampling period is greater than 90 milliseconds.
14. The 5GNR UE of claim 11 wherein the UL HARQ BLER comprises UL HARQ BLER for a Long Term Evolution (LTE) access node.
15. The 5GNR UE of claim 11 further comprising the control circuitry configured to identify excessive UL path loss, and in response to the excessive UL HARQ BLER and the excessive UL path loss, to select the lower 5GNR transmit power and signal the lower 5GNR transmit power to the 5GNR radio.
16. The 5GNR UE of claim 15 wherein the control circuitry is configured to average the UL path loss for a loss sampling period, compare the average UL path loss for the loss sampling period to a loss threshold, and detect when the average UL path loss for the loss sampling period exceeds the loss threshold to identify the excessive UL path loss.
17. The 5GNR UE of claim 16 wherein the loss sampling period is greater than 90 milliseconds.
18. The 5GNR UE of claim 15 wherein the UL path loss comprises UL path loss for a Long Term Evolution (LTE) access node.
19. The 5GNR UE of claim 11 wherein the control circuitry comprises a 5GNR Radio Resource Control (RRC).
20. The 5GNR UE of claim 11 wherein the control circuitry comprises a 5GNR Media Access Control (MAC).