Uplink transmission power in a multicarrier wireless device

• US 9,210,665 B2
• Filed: 01/29/2015
• Issued: 12/08/2015
• Est. Priority Date: 04/17/2012
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Ofinno Technologies, LLC
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Elallam, Ahmed
• Application Number:
  US14/608,244
• Publication Number:
  US 20150139162A1
• Time in Patent Office: 313 Days
• US Class Current: 1/1
• 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 sounding reference signal (SRS) is being scheduled for transmission in the last symbol of subframe n on a first cell in a first cell group. The last symbol overlaps in time with transmission of an uplink packet in subframe n+1 in a second cell in a second cell group. The wireless device transmits the SRS if a power parameter is less than or equal to a maximum allowable transmission power in the symbol. A calculation of the power parameter considers transmission power of the uplink packet if the overlap in time exceeds a first duration.

Claims

1. A wireless device comprising:

a) one or more communication interfaces;

b) one or more processors; and

c) memory storing instructions that, when executed, cause said wireless device to;

i) receive at least one message comprising configuration parameters of;

(1) a plurality of cells grouped into a plurality of cell groups; and

(2) sounding reference signals (SRSs);

ii) decode at least one information element triggering transmission of said SRSs, one of said SRSs being scheduled for transmission in the last symbol of subframe n on a first cell in a first cell group in said plurality of cell groups, said last symbol overlapping in time with transmission of an uplink packet in subframe n+1 in a second cell in a second cell group of said plurality of cell groups, said second cell group being different from said first cell group; and

iii) transmit said one of said SRSs if a power value is less than or equal to a maximum allowable transmission power in said symbol, a calculation of said power value considering transmission power of said uplink packet if said overlap in time exceeds a first duration.

2. The wireless device of claim 1, wherein said instructions, when executed, cause said wireless device to drop said one of said SRSs if said power value is more than said maximum allowable transmission power.

3. The wireless device of claim 1, wherein said calculated power value is a total transmission power of said wireless device.

4. The wireless device of claim 3, wherein said first duration is determined such that said total transmission power is less than or equal to said maximum allowable transmission power of said wireless device during said overlap in time.

5. The wireless device of claim 3, wherein said total transmission power is limited to said maximum allowable transmission power of said wireless device during said overlap in time.

6. The wireless device of claim 1, wherein said first duration is more than twenty micro seconds.

7. The wireless device of claim 1, wherein said instructions, when executed, cause said wireless device to reduce a transient transmission power of at least one of said uplink packet and said SRS during said overlap in time, said overlap in time being less than a second duration.

8. The wireless device of claim 1, wherein said calculation ignores transmission power of said uplink packet if said overlap in time is smaller than a second duration.

9. The wireless device of claim 8, wherein said second duration is less than or equal to said first duration.

10. The wireless device of claim 1, wherein said uplink packet is transmitted on one of:

a) a physical uplink control channel; and

b) a physical uplink shared channel.

11. A method for use by a wireless device, the method comprising:

a) receiving at least one message comprising configuration parameters of;

i) a plurality of cells grouped into a plurality of cell groups; and

ii) sounding reference signals (SRSs);

b) decoding at least one information element triggering transmission of said SRSs, one of said SRSs being scheduled for transmission in the last symbol of subframe n on a first cell in a first cell group in said plurality of cell groups, said last symbol overlapping in time with transmission of an uplink packet in subframe n+1 in a second cell in a second cell group of said plurality of cell groups, said second cell group being different from said first cell group; and

c) transmitting said one of said SRSs if a power value is less than or equal to a maximum allowable transmission power in said symbol, a calculation of said power value considering transmission power of said uplink packet if said overlap in time exceeds a first duration.

12. The method of claim 11, further comprising dropping said one of said SRSs if said power value is more than said maximum allowable transmission power.

13. The method of claim 11, wherein said calculated power value is a total transmission power of said wireless device.

14. The method of claim 13, wherein said first duration is determined such that said total transmission power is less than or equal to said maximum allowable transmission power of said wireless device during said overlap in time.

15. The method of claim 13, wherein said total transmission power is limited to said maximum allowable transmission power of said wireless device during said overlap in time.

16. The method of claim 11, wherein said first duration is more than twenty micro seconds.

17. The method of claim 11, further comprising reducing a transient transmission power of at least one of said uplink packet and said SRS during said overlap in time, said overlap in time being less than a second duration.

18. The method of claim 11, wherein said calculation ignores transmission power of said uplink packet if said overlapping in time is smaller than a second duration.

19. The method of claim 18, wherein said second duration is less than or equal to said first duration.

20. The method of claim 11, wherein said uplink packet is transmitted on one of:

a) a physical uplink control channel; and

b) a physical uplink shared channel.