FINGERPRINT ANALYSIS OF WIRELESS SIGNALS FOR AUTOMATIC DISCONNECT OF WIRELESS DISPLAY

• US 20180098377A1
• Filed: 09/30/2016
• Published: 04/05/2018
• Est. Priority Date: 09/30/2016
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Allada, Anisha, Kolekar, Abhijeet
• Granted Patent: US 10,165,619 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/1454 involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
• CPC Class Codes: G09G 2358/00 Arrangements for display data security
• CPC Class Codes: G09G 2370/025 LAN communication management
• CPC Class Codes: G09G 2370/16 Use of wireless transmission of display information
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 64/003 locating network equipment
• CPC Class Codes: H04W 76/34 Selective release of ongoing connections
• CPC Class Codes: H04W 84/105 PBS [Private Base Station] network H04W84/12 - H04W84/16 take precedence
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A wireless device may disconnect a wireless connection to a remote device. The wireless device may include a memory device and one or more processors coupled to the memory device. The processors may generate a first wireless fingerprint of the wireless device, wherein the first wireless fingerprint comprises a first basic service set identification (BSSID) of a first access point to which the wireless device is connected. The processors may further determine if the BSSID of the wireless device is changed and if the BSSID is changed perform an active scan of a plurality of wireless channels. The processors may further generate a second wireless fingerprint for the wireless device based on the active scan and disconnect a wireless connection of the wireless device if the first wireless fingerprint is at least partially different from the second wireless fingerprint.

Claims

1. An apparatus for termination of a wireless connection of a wireless device to a remote device, the apparatus comprising:

a memory device; and

one or more processors coupled to the memory device, the one or more processors to;

generate a first wireless fingerprint of the wireless device, wherein the first wireless fingerprint comprises a first basic service set identification (BSSID) of a first access point to which the wireless device is connected;

determine if a BSSID the wireless device is connected to is changed;

if the BSSID is changed, perform an active scan of a plurality of wireless channels and generate a second wireless fingerprint for the wireless device based on the active scan; and

terminate the wireless connection of the wireless device if the first wireless fingerprint is at least partially different from the second wireless fingerprint.

2. The apparatus of claim 1, wherein the one or more processors are further to:

determine that the wireless device changed location if a first received signal strength indicator (RSSI) value of the first BSSID and a second RSSI value of the first BSSID have a difference greater than a threshold value, wherein the first RSSI value is generated at the time the wireless connection is established and the second RSSI value is generated at the time of the active scan.

3. The apparatus of claim 1, wherein the first wireless fingerprint comprises a first plurality of service set identifications (SSIDs), a first plurality of BSSIDs, and a first plurality of received signal strength indicators (RSSIs) and the second wireless fingerprint comprises a second plurality of service set identifications (SSIDs), a second plurality of BSSIDs, and a second plurality of received signal strength indicators (RSSIs).

4. The apparatus of claim 1, wherein to determine if the first wireless fingerprint is at least partially different from the second wireless fingerprint, the one or more processors are to determine a number of BSSIDs that are in the first wireless fingerprint and in the second wireless fingerprint.

5. The apparatus of claim 1, wherein to determine if the first wireless fingerprint is at least partially different from the second wireless fingerprint, the one or more processors are to, for each BSSID in a plurality of BSSIDs in the first wireless fingerprint:

calculate a difference in a first RSSI value of a BSSID to a second RSSI value of the BSSID; and

determine whether the difference is above a first threshold.

6. The apparatus of claim 5, wherein the one or more processors are further to determine that the wireless device changed location in response to determining that the difference is above the first threshold.

7. The apparatus of claim 6, wherein the threshold of the plurality of BSSIDs is a percentage of a total number of BSSIDs in the plurality of BSSIDs.

8. The apparatus of claim 1, wherein the wireless connection provides a communication channel from the wireless device to the remote display device.

9. The apparatus of claim 8, wherein the one or more processors are further to determine that the wireless device changed location at least in part in response to determining that a BSSID of the remote display device is not in the second wireless fingerprint.

10. A system of a wireless device comprising:

application circuitry to generate display data for sharing to a remote display device; and

baseband circuitry, coupled to the application circuitry, the baseband circuitry to;

negotiate a wireless connection with the remote display device through a first access point having a first BSSID;

generate a first wireless fingerprint of the wireless device, wherein the first wireless fingerprint comprises a first basic service set identification (BSSID) of a first access point to which the wireless device is connected;

determine if the wireless device is connected to a second access point with a second BSSID;

generate a second wireless fingerprint for the wireless device based on an active scan; and

compare the first wireless fingerprint to the second wireless fingerprint to determine whether to terminate the wireless connection.

11. The system of claim 10, wherein the first wireless fingerprint comprises a first plurality of service set identifications (SSIDs), a first plurality of BSSIDs, and a first plurality of received signal strength indicators (RSSIs) and the second wireless fingerprint comprises a second plurality of service set identifications, a second plurality of BSSIDs, and a second plurality of RSSIs.

12. The system of claim 11, wherein to compare the first wireless fingerprint to the second wireless fingerprint, the baseband circuitry is further to, for each BSSID in the first plurality of BSSIDs, determine whether the BSSID is in the second wireless fingerprint.

13. The system of claim 11, wherein to compare the first wireless fingerprint to the second wireless fingerprint, the baseband circuitry is further to, for each BSSID in the first plurality of BSSIDs:

calculate a difference in a first RSSI value of the BSSID from the first plurality of RSSIs to a second RSSI value of the BSSID from the second plurality of RSSIs; and

determine whether the difference is above a threshold.

14. The system of claim 11, wherein to determine if the wireless device connects to a second access point with the second BSSID, the baseband circuitry is to periodically compare the first BSSID to a current BSSID received from a current access point.

15. The system of claim 11, wherein the baseband circuitry is further to determine that it is to terminate the wireless connection if the BSSID of the remote display device is not in the second wireless fingerprint.

16. An apparatus of a wireless device comprising:

means for establishing a wireless connection to a remote display device through a first wireless access point;

means for generating one or more wireless fingerprints, wherein the wireless fingerprints include a plurality of service set identifiers (SSIDs) with associated basic service set identifications (BSSIDs) and received signal strength indicators (RSSIs); and

means for automatically terminating the wireless connection in response to determining that a first wireless fingerprint is different from a second wireless fingerprint.

17. The apparatus of claim 16, wherein the means for automatically terminating the wireless connection further comprises means for determining a number of BSSIDs that are in the first wireless fingerprint and in the second wireless fingerprint.

18. The apparatus of claim 16, further comprising means to periodically determine whether the wireless connection is through a second wireless access point based on a current BSSID used for the wireless connection.

19. The apparatus of claim 16, wherein the means for generating one or more wireless fingerprints comprises means for performing an active scan of available wireless networks.

20. The apparatus of claim 16, wherein the means for automatically terminating the wireless connection is further to determine a difference between a first RSSI value of the remote display device and a second RSSI value of the remote display device and determine whether the difference is below a threshold.