Techniques for coordinated uplink power control

• US 9,998,999 B2
• Filed: 03/28/2016
• Issued: 06/12/2018
• Est. Priority Date: 01/23/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Yang, Rongzhen, Papathanassiou, Apostolos
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): Bokhari, Syed M
• Application Number:
  US15/083,016
• Publication Number:
  US 20170055228A1
• Time in Patent Office: 806 Days
• Field of Search: 370328-329, 370318, 370332, 370252
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 17/382 for resource allocation, admission control or handover
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0096 Indication of changes in allocation
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 28/16 Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 36/0066 of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points
• CPC Class Codes: Y02D 30/70 in wireless communication networks

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.

Claims

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, via communicative connectivity to one or more other base stations, one or more other uplink status signals received at the 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;

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, comprising the one or more weighting factors to be 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.

9. 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.

10. The computer-implemented method of claim 9, 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.

11. 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).

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

13. The computer-implemented method of claim 12, 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.

14. The computer-implemented method of claim 11, comprising transmitting the first target received parameter in an UplinkPowerControl Information Element (IE).

15. The computer-implemented method of claim 14, 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).

16. 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 via communicative connectivity to one or more other base stations, one or more other uplink status signals received at the one or more other base stations from the wireless device; and

a parameter component arranged for execution by the processor circuit to periodically determine target received power parameters for the wireless device based, at least in part, on the periodically received uplink status signals and on the monitored one or more other uplink status signals received at the one or more other base stations, the parameter component arranged to assign one or more weighting factors to 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, 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 the target received power parameter based on the weighted sum value.

17. The apparatus of claim 16, 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.

18. The apparatus of claim 16, 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.

19. The apparatus of claim 16, 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.

20. The apparatus of claim 16, 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.

21. The apparatus of claim 16, comprising the one or more weighting factors to be 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.

22. The apparatus of claim 16, 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).

23. The apparatus of claim 22, 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.

24. The apparatus of claim 16, comprising a digital display coupled to the processor circuit to present a user interface view.

25. An apparatus for a base station comprising:

means for receiving an uplink status signal from a wireless device;

means for receiving an indication that the wireless device has provided one or more other uplink status signals to one or more other base stations;

means for obtaining via communicative connectivity to the one or more other base stations, information associated with the one or more other uplink status signals provided to the one or more other base stations;

means for assigning one or more weighting factors to the uplink status signals received at the base station and the one or more other base stations;

means for adding signal strengths for the uplink status signals having the one or more assigned weighting factors to determine a weighted sum value;

means for determining a first target received power parameter for the wireless device based, at least in part, on the weighted sum value.

26. The apparatus of claim 25, comprising means for communicating the first target received parameter to the wireless device, the target received power parameter to cause the wireless device to adjust one or more transmit power levels.

27. The apparatus of claim 25, comprising means for operating the base station 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).

28. The apparatus of claim 27, comprising means for communicating to the one or more other base stations via an X2 communication channel in order to obtain the information associated with the one or more other uplink status signals provided to the one or more other base stations by the wireless device.