Arrangements for association and re-association in a wireless network

Patent metadata

Field	Value
Publication number	US-9763254-B2
Application number	US-201414558183-A
Country	US
Kind code	B2
Filing date	Dec 2, 2014
Priority date	Mar 11, 2008
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A method is disclosed for associating network devices to a network. The method can include receiving a beacon from a source by an antenna array, allocating resources to beamform and beamforming after receiving at least a portion of the beacon. The beamforming can be accomplished prior to completion of an association request and prior to receipt of an acceptance signal in response to the association request. Accordingly directional transmissions can be utilized transmit at least part of an association request and to transmit an acceptance signal corresponding to the association request.

First claim

What is claimed is:

1. A method comprising:
receiving at least a portion of a beacon from a source by at least one antenna;
detecting radio-frequency (RF) energy at a predetermined frequency;
allocating resources to perform beamforming based at least in part on the detected RF energy exceeding a predetermined threshold;
beamforming after receiving the at least a portion of the beacon and prior to receipt of an association request acceptance signal, wherein the beamforming comprises determining a relative direction from the at least one antenna to the source;
utilizing a directional configuration to communicate a portion of an association response that occurs in response to an association request, wherein at least a portion of the association request is received in a directional mode;
evaluating for an interference based at least in part on the beamforming; and
sending a re-association request in a second directional mode based at least in part on the evaluating.

2. The method of claim 1 further comprising transmitting a media access control address in response to the beacon.

3. The method of claim 1 further comprising transmitting a media access control address in response to the beacon and triggering the beamforming based on receipt of at least a portion of the beacon.

4. The method of claim 1 wherein the directional transmission utilizes a higher data rate than an omni-directional transmission.

5. The method of claim 1 wherein determining the relative direction comprises determining one of direction of arrival information, an angle of arrival, a time difference of arrival or a frequency difference of arrival.

6. The method of claim 1 , wherein the beamforming comprises performing millimeter wave beamforming.

7. An apparatus comprising:
a sensor to receive an incoming signal and detect radio-frequency (RF) energy at a predetermined frequency;
at least one processor configured to allocate resources to a beamformer module to perform beamforming based at least in part on the detected RF energy exceeding a predetermined threshold;
a direction detect module to detect a direction of origin of the incoming signal;
the beamformer module to beamform towards the incoming signal and to evaluate for an interference, the beamformer module to further determine a relative direction from the at least one antenna to a source;
a trigger module to trigger the beamforming module to beamform, wherein the trigger module activates the beamformer module before an end of an association process;
a receiver to receive a directional transmission during the association process; and
a transmitter to transmit a re-association request based at least in part on the evaluation.

8. The apparatus of claim 7 wherein the beacon is sent in an omni-directional transmission with a lower data rate than a data rate of the directional transmission.

9. The apparatus of claim 7 wherein the incoming signal is a beacon.

10. The apparatus of claim 7 further comprising a receiver to receive an association request acceptance signal.

11. A non-transitory computer readable storage medium including instructions that, when executed by one or more processors, cause the one or more processors to:
receive a beacon from a source by at least one antenna;
detect radio-frequency (RF) energy at a predetermined frequency;
allocate resources to perform beamforming based at least in part on the detected RF energy exceeding a predetermined threshold; and beamform after receiving at least a portion of the beacon and prior to receipt of an association request acceptance signal wherein the beamforming comprises determining a relative direction from the at least one antenna to the source; wherein a directional communication is utilized to transmit the association signal, and wherein, a portion of an association request is transmitted in a directional mode;
reevaluate for an interference based at least in part on the beamforming; and
send a re-association request in a second directional mode based at least in part on the evaluation.

12. The non-transitory computer readable storage medium of claim 11 , wherein the one or more processors are further configured to transmit a media access control address in response to the received beacon.

13. The non-transitory computer readable storage medium of claim 11 wherein the one or more processors are further configured to transmit a media access control address in response to the beacon and trigger the beamforming based on receipt of at least a portion of the beacon.

14. The non-transitory computer readable storage medium of claim 11 wherein the directional transmission utilizes a higher data rate than an omni-directional transmission.

15. The non-transitory computer readable storage medium of claim 11 wherein beamforming comprises performing millimeter wave beamforming.

Assignees

• Intel Corp

Inventors

• Cordeiro Carlos
• Kesselman Alex
• Trainin Solomon

Classifications

• H04W72/51 Primary

  based on terminal or device properties · CPC title

• H04B7/0682

  using phase diversity (e.g. phase sweeping) · CPC title

• H04B7/0617 Primary

  for beam forming · CPC title

• H04W72/048 Primary

  Electricity · mapped topic

• H04W74/0866

  using a dedicated channel for access · CPC title