Load-adaptive uplink transmit power

• US 8,725,190 B2
• Filed: 11/30/2009
• Issued: 05/13/2014
• Est. Priority Date: 12/01/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lott, Christopher Gerard, Attar, Rashid Ahmed Akbar, Ghosh, Donna
• Primary Examiner(s): Ghebretinsae, Temesgh
• Assistant Examiner(s): TALUKDER, MD K
• Application Number:
  US12/627,746
• Publication Number:
  US 20100167780A1
• Time in Patent Office: 1,625 Days
• Field of Search: 455/67.11, 455/70, 455/522, 455/445, 455/450, 455/451, 455/452.1, 455/432.1, 455/434, 455/435.2, 455/436, 455/438, 455/439, 455/63.1, 455/73, 370/236, 370/329, 370/336, 370/337, 370/498, 370/492, 370/468, 370/345
• US Class Current: 455/522
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal

Abstract

An access terminal of a wireless communication system includes: an antenna; a transceiver; a load level monitor communicatively coupled to the transceiver and configured to receive, from the transceiver via the antenna, and analyze indications of reverse link wireless network traffic load over a period of time in a region of the wireless network containing the access terminal; a load level module configured to combine the indications over the period of time to determine a load level associated with the access terminal; and a transmission module configured to cause the transceiver to change from transmitting data packets in accordance with a first value of a transmission characteristic to transmitting data packets in accordance with a second value of the transmission characteristic in response to the load level being below a first load threshold value.

Claims

1. An access terminal of a wireless communication system, the access terminal comprising:

an antenna configured to transmit and receive wireless communications;

a transceiver coupled to the antenna;

a load level monitor communicatively coupled to the transceiver and configured to receive, at the access terminal from the transceiver via the antenna from a plurality of base transceiver stations (BTSs) in a region of the wireless network containing the access terminal, indications of reverse link wireless network traffic load over a period of time in the region of the wireless network containing the access terminal and to analyze the indications;

a load level module communicatively coupled to the load level monitor and configured to combine the indications for each of the plurality of BTSs over the period of time to obtain a filtered indication for each of the plurality of BTSs and to combine the filtered indications to determine an aggregate load level associated with the region of the wireless network containing the access terminal; and

a transmission module, communicatively coupled to the load level module and the transceiver, configured to cause the transceiver to change from transmitting data packets in accordance with a first value of a transmission characteristic to transmitting data packets in accordance with a second value of the transmission characteristic in response to the aggregate load level being below a first load threshold value.

2. The access terminal of claim 1 wherein the second value is such that the data packets transmitted in accordance with the second value will have a lower-delay termination target than the packets transmitted in accordance with the first value.

3. The access terminal of claim 2 wherein the transmission characteristic is a transmit power used by the transceiver to transmit data packets, and wherein the second value is higher than the first value.

4. The access terminal of claim 3 wherein the transmission module is configured to cause the transceiver to transmit data packets at a power level that is less than or equal to a transmit power limit value.

5. The access terminal of claim 4 wherein the transmit power limit value is a ratio relative to a traffic-to-pilot ratio, and wherein the access terminal is configured to wirelessly receive the transmit power limit value via the antenna and store the transmit power limit value.

6. The access terminal of claim 1 wherein the load level module is configured to average the indications for each of the plurality of BTSs over the period of time to obtain the filtered indications.

26. The access terminal of claim 1 wherein the load level monitor is further configured to receive the indications of reverse link wireless network traffic load as quantized indications.

27. The access terminal of claim 1 wherein the transmission module is further configured to cause the transceiver to change from transmitting data packets in accordance with the second value of the transmission characteristic to transmitting data packets in accordance with the first value of the transmission characteristic in response to the aggregate load level being above a second load threshold value.

28. The access terminal of claim 27 wherein the first load threshold value and the second load threshold value are equal.

29. The access terminal of claim 27 wherein the second load threshold value is greater than the first load threshold value.

30. The access terminal of claim 6 wherein the load level module is further configured to average the filtered indications to determine the aggregate load level.

7. A load-adaptive method of transmitting information in a wireless network from an access terminal, the method comprising:

transmitting first data packets from the access terminal using a transmission characteristic of a first value;

receiving, at the access terminal from a plurality of base transceiver stations (BTSs) in a region of the wireless network containing the access terminal, indications of reverse link wireless network traffic load over a period of time in the region of the wireless network containing the access terminal;

combining the indications for each of the plurality of BTSs over the period of time to obtain a filtered indication for each of the plurality of BTSs;

combining the filtered indications to determine an aggregate load level associated with the region of the wireless network containing the access terminal;

determining whether the aggregate load level is below a first threshold load level; and

transmitting second data packets from the access terminal using a transmission characteristic of a second value in response to the aggregate load level being determined to be below the first threshold load level.

8. The method of claim 7 wherein the second data packets are transmitted with a lower-delay termination target than the first packets.

9. The method of claim 8 wherein the transmission characteristic is a transmit power used by the access terminal to transmit data packets, and wherein the second value is higher than the first value.

10. The method of claim 9 wherein the second value is less than or equal to a transmit power limit value.

11. The method of claim 10 wherein the transmit power limit value is a ratio relative to a traffic-to-pilot ratio, and wherein the method further comprises wirelessly receiving the transmit power limit value at the access terminal.

12. The method of claim 7 further comprising:

determining, after transmitting the second data packets using the transmission characteristic of the second value, whether the aggregate load level is above a second threshold load level; and

transmitting third data packets from the access terminal using the transmission characteristic of the first value in response to the aggregate load level being determined to be above the second threshold load level.

13. The method of claim 7 further comprising determining that transmitting the second data packets using a lower-delay termination target is permitted.

14. The method of claim 7 wherein combining the indications for each of the plurality of BTSs comprises averaging the indications for each of the plurality of BTSs to obtain the filtered indications.

31. The method of claim 14 wherein combining the filtered indications comprises averaging the filtered indications to determine the aggregate load level.

15. A non-transitory computer program product comprising:

a processor-readable medium storing processor-readable instructions configured to cause a processor to;

transmit first data packets from an access terminal of a wireless communication network using a transmit power of a first value;

receive, at the access terminal from a plurality of base transceiver stations (BTSs) in a region of the wireless network containing the access terminal, indications of reverse link wireless network traffic load over a period of time in the region of the wireless communication network containing the access terminal;

combine the indications for each of the plurality of BTSs over the period of time to obtain a filtered indication for each of the plurality of BTSs;

combine the filtered indications to determine an aggregate load level associated with the region of the wireless network containing the access terminal; and

transmit second data packets from the access terminal using a transmit power of a second value, higher than the first value, in response to the aggregate load level being below a first threshold load level.

16. The computer program product of claim 15 wherein the instructions are configured to cause the processor to transmit the second data packets such that the second value is less than or equal to a transmit power limit value.

17. The computer program product of claim 16 wherein the transmit power limit value is a ratio relative to a traffic-to-pilot ratio.

18. The computer program product of claim 15 wherein the second value is sufficiently high to reduce a termination goal of the second data packets relative to the first data packets.

19. The computer program product of claim 15 further comprising instructions configured to cause the processor to transmit third data packets, after the second data packets, from the access terminal using the transmit power of the first value in response to the aggregate load level being above a second threshold load level while transmitting the second data packets.

20. The computer program product of claim 15 further comprising instructions configured to cause the processor to inhibit transmission of the second data packets at the transmit power of the second level unless an indication is received that using a higher transmit power by the access terminal is permitted.

21. The computer program product of claim 15 wherein the instructions configured to cause the processor to combine the indications for each of the plurality of BTSs are configured to cause the processor to average the indications to obtain the filtered indications.

22. An access terminal configured to provide a load-adaptive termination goal, the access terminal comprising:

an antenna configured to transmit and receive wireless communications;

a transceiver coupled to the antenna;

transmitting means, communicatively coupled to the transceiver, for transmitting first data packets in accordance with a first termination goal in response to an aggregate traffic load of a region of a wireless network associated with the access terminal being below a first threshold and for transmitting second data packets in accordance with a second termination goal in response to the aggregate traffic load being above a second threshold, the first termination goal being lower than the second termination goal; and

load means, communicatively coupled to the transmitting means and the transceiver, for combining indications of reverse link wireless traffic load received by the transceiver from each of a plurality of base transceiver stations (BTSs) over a period of time to determine a filtered indication for each of the plurality of BTSs, to combine the filtered indications to obtain the aggregate traffic load, and for providing an indication of the aggregate traffic load to the transmitting means.

23. The access terminal of claim 22 wherein the transmitting means are configured to transmit the first data packets with a higher transmit power level than the second data packets.

24. The access terminal of claim 22 wherein the transmitting means are configured to transmit the first data packets at a power level up to a transmit power limit value.

25. The access terminal of claim 24 wherein the transmit power limit value is a ratio relative to a traffic-to-pilot ratio, and wherein the access terminal further comprises receiving means for receiving the transmit power limit value via the antenna and the transceiver and storing the transmit power limit value.

32. The access terminal of claim 22 wherein the load means is configured to average the indications for each of the plurality of BTSs over the period of time to determine the filtered indication for each of the plurality of BTSs.

33. The access terminal of claim 32 wherein the load means is further configured to average the filtered indications to obtain the aggregate traffic load.