Resource Allocation in a Communication System

• US 20130301532A1
• Filed: 07/17/2013
• Published: 11/14/2013
• Est. Priority Date: 03/19/2007
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Oteri, Oghenekome F., McCoy, James W.
• Granted Patent: US 9,992,747 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• 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 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/262 taking into account adaptive modulation and coding [AMC] scheme AMC per se H04L1/0001
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/54 Signalisation aspects of the TPC commands, e.g. frame structure

Abstract

Methods and corresponding systems for determining a transmit power in a wireless device include receiving, in the wireless device, a cell-wide power control parameter related to a target receive power at a serving base station. Thereafter, a transmit power is calculated in response to the cell-wide power control parameter and an implicit mobile-specific power control parameter. The wireless device then transmits using the transmit power. The cell-wide power control parameter can be a cell target signal to interference-plus-noise ratio, or a fractional power control exponent. The implicit mobile-specific power control parameter can be a modulation and coding level previously used by the wireless device, or a downlink SINR level measured by the wireless device.

Claims

1. A method for wireless communication power control comprising:

receiving a resource allocation request from a wireless device, wherein the resource allocation request includes a maximum number of resource blocks based on one or more of a current power level and a current modulation and coding scheme (MCS) of the wireless device;

sending a dynamic resource allocation grant for the wireless device; and

reducing a transmit power for the wireless device when an allocated number of resource blocks exceeds the maximum number of resource blocks for the wireless device.

2. The method of claim 1, wherein the dynamic resource allocation grant includes:

a power control instruction for use during a duration of the dynamic resource allocation grant,

an allocation of a number of resource blocks associated with an allocation bandwidth, and

an instruction to use a dynamic grant transmit power; and

3. The method of claim 1, further comprising:

sending a channel sounding request; and

receiving channel sounding data in response to the channel sounding request.

4. The method of claim 1, further comprising:

receiving a second resource allocation request from the wireless device;

sending a persistent resource allocation grant for the wireless device, wherein the persistent resource allocation grant includes a second power control instruction for initial use during the persistent resource allocation grant; and

sending subsequent power control instructions for the wireless device during a duration of the persistent resource allocation grant.

5. The method of claim 4, wherein the sending subsequent power control instructions comprises sending adjustment instructions, wherein the adjustment instructions include one or more of an instruction to increment power and an instruction to decrement power.

6. A method for wireless communication power control comprising:

receiving a resource allocation request from a wireless device;

sending a persistent resource allocation grant for the wireless device, wherein the persistent resource allocation grant includes a power control instruction for initial use during the persistent resource allocation grant; and

sending subsequent power control instructions for the wireless device during a duration of the persistent resource allocation grant.

7. The method of claim 6, wherein the sending subsequent power control instructions comprises sending adjustment instructions, wherein the adjustment instructions include one or more of an instruction to increment power and an instruction to decrement power.

8. A method for wireless communication power control comprising:

receiving a resource allocation request, where the resource allocation request is based at least in part on power consumption requirements of a wireless device;

sending a resource allocation grant for the wireless device; and

reducing a transmit power for the wireless device when an allocated number of resource blocks exceeds the maximum number of resource blocks for the wireless device.

9. The method of claim 8 comprising, when the resource allocation grant is a dynamic resource allocation grant, sending a dynamic power control instruction for execution by the wireless device during a duration of the dynamic resource allocation grant.

10. The method of claim 8 comprising, when the resource allocation grant is a persistent resource allocation grant, sending an initial power control instruction for initial execution by the wireless device during a duration of the persistent resource allocation grant.

11. The method of claim 10 comprising sending subsequent power control instructions for subsequent execution by the wireless device during the duration of the persistent resource allocation grant.

12. The method of claim 8 comprising:

when the resource allocation grant is a dynamic resource allocation grant, sending a dynamic power control instruction for execution by the wireless device during a duration of the dynamic resource allocation grant; and

when the resource allocation grant is a persistent resource allocation grant, sending an initial power control instruction for initial execution by the wireless device during a duration of the persistent resource allocation grant and sending subsequent power control instructions for subsequent execution by the wireless device during the duration of the persistent resource allocation grant.