Techniques for coordinated uplink power control

Patent metadata

Field	Value
Publication number	US-9301219-B2
Application number	US-201213532841-A
Country	US
Kind code	B2
Filing date	Jun 26, 2012
Priority date	Jan 23, 2012
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

Examples are disclosed for determining, at a base station, a target received power parameter for a wireless device in communication with the base station. In some examples, the target received power parameter may be determined based on one or more uplink status signals received from the wireless device at the base station and/or one or more other base stations. For these examples, the wireless device may adjust one or more transmit power levels responsive to receiving the target received power parameter from the base station. Other examples are described and claimed.

First claim

What is claimed is:

1. A computer-implemented method comprising:
receiving, at a base station of a wireless network, an uplink status signal from a wireless device;
monitoring, at the base station, one or more other uplink status signals received at one or more other base stations from the wireless device;
assigning one or more weighting factors to the uplink status signals received at the base station and the one or more other base stations, the one or more weighting factors associated with at least one of a mobility of the wireless device, a direction of movement of the wireless device, a rate of movement of the wireless device or strength of a received uplink status signal;
adding signal strengths for the uplink status signals having the one or more assigned weighting factors to determine a weighted sum value;
determining a first target received power parameter for the wireless device based, at least in part, on the weighted sum value; and
transmitting the first target received power parameter to the wireless device.

2. The computer-implemented method of claim 1 , comprising the target received power parameter to cause the wireless device to adjust one or more transmit power levels.

3. The computer-implemented method of claim 1 , the base station monitoring the one or more other uplink status signals based, at least in part, on a determination that the wireless device previously adjusted the one or more transmit power levels based on a second target received power parameter previously received from the base station.

4. The computer-implemented method of claim 1 , comprising the base station to cause the wireless device to operate in an uplink coordinated multi-point (UL CoMP) mode based on a determination that the one or more base stations are capable of serving as reception points for the wireless device.

5. The computer-implemented method of claim 1 , comprising the base station to monitor the one or more uplink status signals received at the one or more base stations via a communication channel capable of communicatively coupling the base station with the one or more other base stations.

6. The computer-implemented method of claim 1 , comprising:
determining which uplink status signal from among the uplink status signals received at the base station and the one or more other base stations indicates a strongest uplink status signal; and
using the strongest uplink status signal to determine the first target received power parameter.

7. The computer-implemented method of claim 1 , comprising:
determining separate target received power parameters for each of the uplink status signals received at the base station and the one or more other base stations; and
averaging the separately determined target received power parameters to determine the first target received power parameter.

8. The computer-implemented method of claim 1 , transmitting the first target received power parameter to the wireless device in a closed loop power control command.

9. The computer-implemented method of claim 8 , comprising the base station periodically transmitting subsequent target received power parameters to cause the wireless device to adjust the one or more transmit power levels based on the subsequent target received power parameters.

10. The computer-implemented method of claim 1 , comprising operating the base station in compliance with one or more or more 3 rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) standards to include LTE-Advanced (LTE-ADV).

11. The computer-implemented method of claim 10 , comprising operating the base station as an Evolved Node B (eNB).

12. The computer-implemented method of claim 11 , comprising monitoring the one or more other uplink status signals via an X2 communication channel capable of communicatively coupling the base station to the one or more other base stations.

13. The computer-implemented method of claim 10 , comprising transmitting the first target received parameter in an UplinkPowerControl Information Element (IE).

14. The computer-implemented method of claim 13 , the UplinkPowerControl IE to indicate the first target received power parameter for both the Physical Uplink Shared Channel (PUSCH) and the Physical Uplink Control Channel (PUCCH).

15. An apparatus for a base station comprising:
a processor circuit;
an uplink status component arranged for execution by the processor circuit to periodically receive uplink status signals from a wireless device;
a monitor component arranged for execution by the processor circuit to monitor one or more other uplink status signals received at one or more other base stations from the wireless device; and
a parameter component arranged for execution by the processor circuit to periodically:
assign one or more weighting factors to the uplink status signals periodically received at the base station and the monitored one or more uplink status signals received at the one or more other base stations, the one or more weighting factors associated with at least one of a mobility of the wireless device, a direction of movement of the wireless device, a rate of movement of the wireless device or strength of a received uplink status signal;
add status signal strengths for the uplink status signals having the one or more assigned weighting factors to determine a weighted sum value; and
determine a target received power parameter for the wireless device based, at least in part, on the weighted sum value.

16. The apparatus of claim 15 , comprising a radio interface coupled to the processor circuit to periodically communicate the target received parameters to the wireless device, each periodically communicated target received power parameter to cause the wireless device to adjust one or more transmit power levels.

17. The apparatus of claim 15 , comprising the monitor component to monitor the one or more uplink status signals received at the one or more base stations via a communication channel capable of communicatively coupling the base station with the one or more other base stations.

18. The apparatus of claim 15 , comprising the parameter component also arranged to periodically determine which uplink status signal from among an uplink status signal currently received at the base station and the monitored one or more uplink status signals received at the one or more other base stations indicates a strongest uplink status signal and use the strongest uplink status signal to determine the target received power parameter.

19. The apparatus of claim 15 , comprising the parameter component also arranged to determine separate target received power parameters for the uplink status signal currently received at the base station and the monitored one or more uplink status signals received at the one or more other base stations and average the separately determined target received power parameters to determine the target received power parameter.

20. The apparatus of claim 15 , comprising the base station arranged to operate as an Evolved Node B (eNB) in compliance with one or more or more 3 rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) standards to include LTE-Advanced (LTE-ADV).

21. The apparatus of claim 20 , comprising an X2 interface coupled to the processor circuit to enable the monitor component to monitor the one or more other uplink status signals via an X2 communication channel capable of being coupled to the one or more other base stations.

22. The apparatus of claim 15

Assignees

• Yang Rongzhen
• Papathanassiou Apostolos
• Intel Corp

Inventors

• Yang Rongzhen
• Papathanassiou Apostolos

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/54

  based on quality criteria · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/52

  based on load · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title