System and method for identifying access point

• US 7,577,423 B2
• Filed: 08/26/2006
• Issued: 08/18/2009
• Est. Priority Date: 04/28/2006
• Status: Expired due to Fees

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Tang, Cheng-Wen
• Primary Examiner(s): Trinh; Sonny
• Application Number:
  US11/309,586
• Publication Number:
  US 20070254615A1
• Time in Patent Office: 1,088 Days
• Field of Search: 455/410, 455/411, 455/422.1, 455/432.1, 455/456.3, 455/452.1, 455/67.11, 726/23, 726/27, 370/351, 370/310, 370/310.2, 370/338
• US Class Current: 455/410
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 12/12 Detection or prevention of fraud
• CPC Class Codes: H04W 12/122 Counter-measures against attacks; Protection against rogue devices
• CPC Class Codes: H04W 12/73 Access point logical identity
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A system for identifying an access point is provided, the system arranged in a mobile station associated with the access point. The system includes a detecting module, a controlling module, a determining module, and an identifying module. The detecting module detects a beacon from the access point. The controlling module controls a connection status between the mobile station and the access point. The determining module determines whether the number of the mobile stations associated with the access point varies with changes in the connection status. The identifying module identifies a status of the access point based on a determination result. A method for identifying an access point is also provided.

Claims

1. A system for identifying an access point, the system arranged in a mobile station associated with the access point via a wireless network, the system comprising:

a detecting module for detecting a beacon from the access point;

a controlling module for controlling a connection status between the mobile station and the access point, wherein the connection status comprises an association status and a disassociation status;

a determining module for determining whether the number of the mobile stations associated with the access point varies with changes of the connection status between the association status and the disassociation status; and

an identifying module for identifying a status of the access point based on the determination result;

wherein the identifying module identifies the access point as authentic when the number of the mobile stations associated with the access point varies with changes of the connection status between the association status and the disassociation status, or identifies the access point as fake when the number of the mobile stations associated with the access point does not vary with changes of the connection status between the association status and the disassociation status.

2. The system as recited in claim 1, wherein the number of the mobile stations associated with the access point is indicated by a station count subfield in an information element of a quality-of-service basic service set (QBSS) load.

3. The system as recited in claim 1, wherein the wireless network is a wireless local area network complying with an IEEE 802.11e standard.

4. The system as recited in claim 1, wherein the mobile station is a laptop computer.

5. A method for identifying an access point utilized in a mobile station associated with the access point, the method comprising:

detecting a beacon from the access point;

associating the mobile station with the access point after detecting the beacon;

determining whether the number of mobile stations associated with the access point varies when the mobile station is associated with the access point;

disassociating the mobile station from the access point if the number of mobile stations associated with the access point varies;

determining whether the number of mobile stations associated with the access point varies again when the mobile station is disassociated with the access point; and

identifying the access point as authentic if the number of mobile stations associated with the access point varies again.

6. The method as recited in claim 5, wherein the number of mobile stations associated with the access point is indicated by a station count subfield in an information element of a quality-of-service basic service set (QBSS) load.

7. The method as recited in claim 5, further comprising a step of identifying the access point as fake if the number of mobile stations associated with the access point does not vary when the mobile station is associated with the access point.

8. The method as recited in claim 7, further comprising a step of identifying the access point as fake if the number of mobile stations associated with the access point does not vary again when the mobile station is disassociated with the access point.

9. A method for identifying an access point, comprising the steps of:

associating a mobile station with an access point by detecting available beacons from said access paint;

verifying variation of a number for counting associated and disassociated times of said access point from said available beacons; and

identifying said access point as fake when said number fails to vary.

10. The method as recited in claim 9, further comprising the step of verifying said variation of said number when said mobile station is disassociated from said access point in order to identify said access point.