DEVICE, SYSTEM, AND METHOD OF ADJUSTING CHANNEL UTILIZATION FOR WIRELESS TRANSMISSION

• US 20120071192A1
• Filed: 09/21/2010
• Published: 03/22/2012
• Est. Priority Date: 09/21/2010
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Li, Qinghua, Wong, Wendy C., Xue, Feng
• Granted Patent: US 8,467,472 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission
• CPC Class Codes: H04W 74/085 collision avoidance

Abstract

Device, system, and method of adjusting channel utilization for wireless transmission. For example, a wireless communication unit may control a wireless transmission by a wireless communication device during a contention period, wherein the wireless communication unit is to wait for a back-off period prior to beginning the wireless transmission during the contention period, and wherein a duration of the back-off period is based on a transmission power of the wireless transmission. Other embodiments are described and claimed.

Claims

1. A wireless communication device comprising:

a wireless communication unit to control a wireless transmission by the wireless communication device during a contention period,

wherein the wireless communication unit is to wait for a back-off period prior to beginning the wireless transmission during the contention period,

and wherein a duration of the back-off period is based on a contention-window adjustment function corresponding to a transmission power of the wireless transmission.

2. The wireless communication device of claim 1, wherein the contention-window adjustment function is based on a relationship between the transmission power and a maximal transmission power as follows:

f(P)=1+(P/Pmax)̂

2, wherein f(P) denotes the contention-window adjustment function, wherein P denotes the transmission power, and wherein Pmax denotes the maximal transmission power.

3. The wireless communication device of claim 1, wherein the contention-window adjustment function is based on a relationship between a transmission distance, denoted D(P), achieved by the transmission power, denoted P, and a maximal transmission distance, denoted Dmax, as follows:

f(P)=1+(D(P)/Dmax)̂

2.

4. The wireless communication device of claim 1, wherein the wireless communication unit is to set the transmission power based on one or more parameters of a communication link for transmitting the wireless transmission.

5. The wireless communication device of claim 4, wherein the wireless communication unit is to repeat the setting of the transmission power at a predefined repetition rate.

6. The wireless communication device of claim 4, wherein the wireless communication unit is to set the transmission power based on at least one of a data rate, a modulation-coding-scheme, a quality-of-service of the communication link, a path-loss measurement, a communication link quality, and an interference to another device.

7. The wireless communication device of claim 1, wherein the wireless communication unit is to determine the size of a contention window based on the contention-window adjustment function and to select the back-off period within the contention window, and wherein the contention-window adjustment function is monotonically decreasing with respect to the transmission power.

8. The wireless communication device of claim 1, wherein the wireless communication unit is to increase the duration of the back-off period with respect to an increase in the transmission power.

9. A wireless communication system including:

a wireless communication device including;

at least one antenna; and

a wireless communication unit to control a wireless transmission via the antenna according to a back-off mechanism,

wherein the wireless communication unit is to determine at least one back-off parameter of the back-off mechanism based on a transmission power of the wireless transmission.

10. The wireless communication system of claim 9, wherein the at least one back-off parameter is related to a duration of a back-off period.

11. The wireless communication system of claim 10, wherein the at least one back-off parameter includes a contention window parameter defining a contention window.

12. The wireless communication system of claim 11, wherein the contention window parameter includes a minimum contention window value.

13. The wireless communication system of claim 10, wherein the wireless communication unit is to increase the duration of the back-off period with respect to an increase in the transmission power.

14. The wireless communication system of claim 9, wherein the wireless communication unit is to set the transmission power based on one or more parameters of a communication link for transmitting the wireless transmission.

15. The wireless communication system of claim 14, wherein the wireless communication unit is to repeat the setting of the transmission power at a predefined repetition rate.

16. The wireless communication system of claim 14, wherein the wireless communication unit is to set the transmission power based on at least one of a data rate, a modulation-coding-scheme, a quality-of-service of the communication link, a path-loss measurement, a communication link quality, and an interference to another device.

17. A method including:

at a wireless communication device, setting a transmission power of a wireless transmission based on one or more parameters of a communication link for transmitting the wireless transmission according to a back-off mechanism utilizing a back-off period; and

based on the transmission power, adjusting a duration of the back-off period.

18. The method of claim 17, wherein setting the transmission power includes setting the transmission power based on at least one of a data rate, a modulation-coding-scheme, a quality-of-service of the communication link, a path-loss measurement, a communication link quality, and an interference to another device.

19. The method of claim 17, wherein adjusting the duration of the back-off period includes increasing the duration of the back-off period with respect to an increase in the transmission power.

20. The method of claim 17, wherein adjusting the duration of the back-off period includes adjusting a size of a contention window based on a predefined function, which is monotonically decreasing with respect to the transmission power, and selecting the back-off period within the contention window.