APPARATUS, SYSTEM AND METHOD OF TRANSMIT POWER CONTROL FOR WIRELESS COMMUNICATION

• US 20140235287A1
• Filed: 04/25/2013
• Published: 08/21/2014
• Est. Priority Date: 02/15/2013
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Maltsev, Alexander, Sadri, Ali S., Pudeyev, Andrey, Nicholls, Richard B.
• Granted Patent: US 9,225,396 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0426 Power distribution
• CPC Class Codes: H04B 7/043 using best eigenmode, e.g. beam forming or beam steering
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04W 52/14 Separate analysis of uplink or downlink
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 52/267 taking into account the information rate
• 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 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

Some demonstrative embodiments include apparatuses, systems and/or methods of transmit power control for wireless communication. For example, an apparatus may include a controller to control a plurality of transmit powers of a plurality of directional beams formed by an antenna array to transmit a wireless communication. The controller may control the plurality of transmit powers based on at least first and second power limits, the first power limit including a power density limit corresponding to a power density of a directional beam of the plurality of directional beams, and the second power limit including a total transmit power limit corresponding to a total of the transmit powers.

Claims

1. An apparatus comprising:

a controller to control a plurality of transmit powers of a plurality of directional beams formed by an antenna array to transmit a wireless communication, said controller is to control said plurality of transmit powers based on at least first and second power limits, said first power limit including a power density limit corresponding to a power density of a directional beam of said plurality of directional beams, and said second power limit including a total transmit power limit corresponding to a total of said transmit powers.

2. The apparatus of claim 1, wherein said controller is to control said transmit powers based on throughputs of said directional beams achievable by said plurality of transmit powers.

3. The apparatus of claim 2, wherein said controller is to control said transmit powers based on a maximal combined throughput corresponding to the throughputs of said directional beams.

4. The apparatus of claim 1, wherein said power density limit relates to the power density at a predefined distance from said antenna array.

5. The apparatus of claim 4, wherein said controller is to determine said transmit powers according to the following criterion:

6. The apparatus of claim 1, wherein said controller is to determine said transmit powers according to the following criterion:

7. The apparatus of claim 1, wherein said controller is to control said plurality of transmit powers to generate each of said directional beams having a power density equal to or lesser than said power density limit.

8. The apparatus of claim 1, wherein said wireless communication comprises a beamformed diversity communication.

9. The apparatus of claim 1, wherein said wireless communication comprises a Multi-Input-Multi-Output (MIMO) communication.

10. The apparatus of claim 9, wherein said wireless communication comprises a Multi-User (MU) MIMO communication, and wherein said plurality of directional beams are directed to a plurality of users.

11. The apparatus of claim 10, wherein said controller is to select said plurality of users based on channel propagation losses of a plurality of channels corresponding to said plurality of users.

12. The apparatus of claim 11, wherein said controller is to select said plurality of users having channel propagation losses within a predefined channel propagation loss range.

13. The apparatus of claim 10, wherein said controller is to control said transmit powers based on throughputs to the plurality of users achievable by said plurality of transmit powers.

14. The apparatus of claim 13, wherein said controller is to control said transmit powers based on a maximal combined throughput corresponding to the throughputs to said users.

15. The apparatus of claim 1, wherein said antenna array comprises a plurality of antenna modules, each antenna module including a plurality of antenna elements coupled to a common Radio-Frequency (RF) chain.

16. The apparatus of claim 1, wherein said wireless communication comprises a communication over a millimeter-wave (mmWave) frequency band.

17. A system comprising:

a wireless communication device including;

an antenna array to generate a plurality of directional beams to transmit a wireless communication;

a controller to control a plurality of transmit powers of said directional beams based on at least first and second power limits, said first power limit including a power density limit corresponding to a power density of a directional beam of said plurality of directional beams, and said second power limit including a total transmit power limit corresponding to a total of said transmit powers; and

a processor to process information to be communicated as part of said wireless communication.

18. The system of claim 17, wherein said controller is to control said transmit powers based on throughputs of said directional beams achievable by said plurality of transmit powers.

19. The system of claim 17, wherein said power density limit relates to the power density at a predefined distance from said antenna array.

20. The system of claim 19, wherein said controller is to determine said transmit powers according to the following criterion:

21. The system of claim 17, wherein said controller is to determine said transmit powers according to the following criterion:

22. The system of claim 17, wherein said controller is to control said plurality of transmit powers to generate each of said directional beams having a power density equal to or lesser than said power density limit.

23. The system of claim 17, wherein said wireless communication comprises a Multi-Input-Multi-Output (MIMO) communication.

24. The system of claim 23, wherein said wireless communication comprises a Multi-User (MU) MIMO communication, and wherein said plurality of directional beams are directed to a plurality of users.

25. The system of claim 17, wherein said wireless communication device comprises an access point.

26. A method comprising:

controlling a plurality of transmit powers of a plurality of directional beams formed by an antenna array for transmitting a wireless communication, said controlling comprises controlling said transmit powers based on at least first and second power limits, said first power limit including a power density limit corresponding to a power density of a directional beam of said plurality of directional beams, and said second power limit including a total transmit power limit corresponding to a total of said transmit powers.

27. The method of claim 26 comprising controlling said transmit powers based on throughputs of said directional beams achievable by said plurality of transmit powers.

28. A product including a non-transitory storage medium having stored thereon instructions that, when executed by a machine, result in:

controlling a plurality of transmit powers of a plurality of directional beams formed by an antenna array for transmitting a wireless communication, said controlling including controlling said plurality of transmit powers based on at least first and second power limits, said first power limit including a power density limit corresponding to a power density of a directional beam of said plurality of directional beams, and said second power limit including a total transmit power limit corresponding to a total of said transmit powers.

29. The product of claim 28, wherein said instructions result in controlling said transmit powers based on throughputs of said directional beams achievable by said plurality of transmit powers.

30. The product of claim 28, wherein said instructions result in determining said transmit powers according to the following criterion: