Signal power management in a multicarrier wireless device

• US 9,867,137 B2
• Filed: 07/04/2016
• Issued: 01/09/2018
• Est. Priority Date: 04/17/2012
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Elallam, Ahmed
• Application Number:
  US15/201,558
• Publication Number:
  US 20160316436A1
• Time in Patent Office: 554 Days
• CPC Class Codes: H04B 7/2618 using hybrid code-time division multiple access [CDMA-TDMA]
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 2011/0096 Network synchronisation
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1835 Buffer management
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 2101/622 Layer-2 addresses, e.g. medium access control [MAC] addresses
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 41/0681 Configuration of triggering conditions
• CPC Class Codes: H04L 43/0864 Round trip delays
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0078 Timing of allocation
• CPC Class Codes: H04L 5/0087 : when data requirements change
• CPC Class Codes: H04L 5/0091 : Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/14 : Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 69/22 : Parsing or analysis of headers
• CPC Class Codes: H04W 52/146 : Uplink power control
• CPC Class Codes: H04W 52/18 : TPC being performed according to specific parameters
• CPC Class Codes: H04W 52/242 : taking into account path loss
• CPC Class Codes: H04W 52/325 : Power control of control or pilot channels
• CPC Class Codes: H04W 52/36 : with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 52/362 : Aspects of the step size
• CPC Class Codes: H04W 52/367 : Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/40 : during macro-diversity or soft handoff
• CPC Class Codes: H04W 52/50 : at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 56/0015 : one node acting as a reference for the others
• CPC Class Codes: H04W 56/0045 : compensating for timing error by altering transmission time
• CPC Class Codes: H04W 56/0065 : using measurement of signal travel time
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 74/004 : in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/006 : in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/008 : with additional processing of random access related information at receiving side
• CPC Class Codes: H04W 74/0833 : Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/18 : Management of setup rejection or failure
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/085 : Access point devices with remote components
• CPC Class Codes: Y02B 30/70 : Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
• CPC Class Codes: Y02B 70/30 : Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

A wireless device determines a first transmission power for a first signal starting in a first subframe and a second transmission power for a second signal starting in a second subframe. When a calculated power value is more than an allowable transmission power a power control mechanism is employed. The wireless device reduces signal transmission power during an overlap period if the first subframe and the second subframe overlap in time by less than a first duration. The wireless device drops a signal if the first subframe and the second subframe overlap in time by more than a second duration.

Claims

1. A method comprising:

receiving at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group;

determining a first transmission power for a first signal starting in a first subframe of a cell of the first cell group;

determining a second transmission power for a second signal starting in a second subframe of the second cell group, wherein the second signal overlaps, in time, with the first signal; and

if a calculated transmission power exceeds an allowable transmission power;

reducing signal transmission power of at least one of the first signal or the second signal during an overlap period if the first subframe and the second subframe overlap, in time, by less than a first duration; and

dropping a transmission of at least one of the first signal or the second signal if the first subframe and the second subframe overlap, in time, by more than a second duration.

2. The method of claim 1, wherein the first signal is a random access preamble signal.

3. The method of claim 1, further comprising decoding at least one information element to trigger transmission of the second signal.

4. The method of claim 1, wherein the first signal is an uplink data packet or an uplink control packet.

5. The method of claim 1, wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.

6. The method of claim 1, wherein the second signal is a sounding reference signal.

7. The method of claim 1, wherein the calculated transmission power is a total transmission power of a wireless device.

8. The method of claim 1, wherein the second signal is a random access preamble signal.

9. The method of claim 1, further comprising transmitting the second signal if the calculated transmission power is less than the allowable transmission power.

10. The method of claim 1, wherein the first duration is equal to the second duration.

11. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the wireless device to;

receive at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group;

determine a first transmission power for a first signal starting in a first subframe of a cell of the first cell group;

determine a second transmission power for a second signal starting in a second subframe of the second cell group, wherein the second signal overlaps, in time, with the first signal; and

if a calculated transmission power exceeds an allowable transmission power;

reduce signal transmission power of at least one of the first signal or the second signal during an overlap period if the first subframe and the second subframe overlap, in time, by less than a first duration; and

drop a transmission of at least one of the first signal or the second signal if the first subframe and the second subframe overlap, in time, by more than a second duration.

12. The wireless device of claim 11, wherein the first signal is a random access preamble signal.

13. The wireless device of claim 11, wherein the instructions, when executed by the one or more processors, further cause the wireless device to decode at least one information element to trigger transmission of the second signal.

14. The wireless device of claim 11, wherein the first signal is an uplink data packet or an uplink control packet.

15. The wireless device of claim 11, wherein the allowable transmission power is a maximum allowable transmission power of the wireless device.

16. The wireless device of claim 11, wherein the second signal is a sounding reference signal.

17. The wireless device of claim 11, wherein the calculated transmission power is a total transmission power of the wireless device.

18. The wireless device of claim 11, wherein the second signal is a random access preamble signal.

19. The wireless device of claim 11, wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit the second signal if the calculated transmission power is less than the allowable transmission power.

20. The wireless device of claim 11, wherein the first duration is equal to the second duration.

21. A method comprising:

transmitting, by a base station and to a wireless device, at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group;

determining, by the wireless device, a first transmission power for a first signal starting in a first subframe of a cell of the first cell group;

determining a second transmission power for a second signal starting in a second subframe of the second cell group, wherein the second signal overlaps, in time, with the first signal; and

if a calculated transmission power exceeds an allowable transmission power;

reducing signal transmission power of at least one of the first signal or the second signal during an overlap period if the first subframe and the second subframe overlap, in time, by less than a first duration; and

dropping a transmission of at least one of the first signal or the second signal if the first subframe and the second subframe overlap, in time, by more than a second duration.

22. The method of claim 21, wherein the first signal is a random access preamble signal.

23. The method of claim 21, further comprising decoding at least one information element to trigger transmission of the second signal.

24. The method of claim 21, wherein the first signal is an uplink data packet or an uplink control packet.

25. The method of claim 21, wherein the allowable transmission power is a maximum allowable transmission power of the wireless device.

26. The method of claim 21, wherein the second signal is a sounding reference signal.

27. The method of claim 21, wherein the calculated transmission power is a total transmission power of the wireless device.

28. The method of claim 21, wherein the second signal is a random access preamble signal.

29. The method of claim 21, further comprising transmitting the second signal if the calculated transmission power is less than the allowable transmission power.

30. The method of claim 21, wherein the first duration is equal to the second duration.

31. A system comprising:

a base station comprising;

one or more processors; and

memory storing instructions that, when executed by the one or more processors of the base station, cause the base station to;

transmit at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group; and

a wireless device comprising;

one or more processors; and

memory storing instructions that, when executed by the one or more processors of the wireless device, cause the wireless device to;

determine a first transmission power for a first signal starting in a first subframe of a cell of the first cell group;

determine a second transmission power for a second signal starting in a second subframe of the second cell group, wherein the second signal overlaps, in time, with the first signal; and

if a calculated transmission power exceeds an allowable transmission power;

reduce signal transmission power of at least one of the first signal or the second signal during an overlap period if the first subframe and the second subframe overlap, in time, by less than a first duration; and

drop a transmission of at least one of the first signal or the second signal if the first subframe and the second subframe overlap, in time, by more than a second duration.

32. The system of claim 31, wherein the first signal is a random access preamble signal.

33. The system of claim 31, wherein the instructions stored in the memory of the wireless device, when executed by the one or more processors of the wireless device, further cause the wireless device to decode at least one information element to trigger transmission of the second signal.

34. The system of claim 31, wherein the first signal is an uplink data packet or an uplink control packet.

35. The system of claim 31, wherein the allowable transmission power is a maximum allowable transmission power of the wireless device.

36. The system of claim 31, wherein the second signal is a sounding reference signal.

37. The system of claim 31, wherein the calculated transmission power is a total transmission power of the wireless device.

38. The system of claim 31, wherein the second signal is a random access preamble signal.

39. The system of claim 31, wherein the instructions stored in the memory of the wireless device, when executed by the one or more processors of the wireless device, further cause the wireless device to transmit the second signal if the calculated transmission power is less than the allowable transmission power.

40. The system of claim 31, wherein the first duration is equal to the second duration.