Wireless LAN monitoring device

• US 7,155,167 B1
• Filed: 07/24/2001
• Issued: 12/26/2006
• Est. Priority Date: 07/24/2001
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Carty, Clark A.
• Primary Examiner(s): Tieu, Benny Quoc
• Application Number:
  US09/911,203
• Time in Patent Office: 1,981 Days
• Field of Search: 455/67.11, 455/67.14, 455/115.1, 455/115.2, 455/226.1, 455/226.4, 455/423, 455/425
• US Class Current: 455/67.11
• CPC Class Codes: H04L 63/1433 Vulnerability analysis
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A handheld mobile wireless monitoring apparatus is disclosed in which a radio receiver monitors a wireless signal across one or more wireless channels. A user interface enables a user to observe and select a predetermined parameter of the wireless signal to be evaluated. A processing circuit evaluates the wireless signal to observe the predetermined parameter. An enclosure is provided, dimensioned to be handheld by the user, for retaining the radio receiver, the processing circuit and the user interface.

Claims

1. A handheld mobile wireless monitoring apparatus comprising:

a wireless receiver for receiving a wireless signal across at least one wireless channel;

a user interface comprising an input for receiving data indicative of a selected predetermined parameter of the wireless signal to be evaluated and a display;

a processing circuit coupled to the user interface for evaluating the selected predetermined parameter of the wireless signal responsive to the data indicative of the selected predetermined parameter and to display the evaluated predetermined parameter on the user interface;

an enclosure, dimensioned to be handheld by the user, for retaining the radio receiver, the processing circuit and the user interface;

wherein the selected predetermined parameter of the wireless signal to be evaluated is selected from one of a group consisting of data rate, channel bandwith, signal direction, Wired Equivalent Privacy (WEP) number of packets transmitted and number of packet errors.

2. The apparatus of claim 1 wherein the wireless receiver is a wireless PC card for monitoring wireless signals operating under the IEEE 802.11 protocols.

3. The apparatus of claim 1 wherein the processing circuit comprises a microprocessor.

4. The apparatus of claim 1 wherein the user interface comprises an LCD display for displaying data about the at least one property of the wireless signal.

5. The apparatus of claim 1 wherein the user interface comprises a keypad for selecting the predetermined parameter of the wireless signal to be observed.

6. The apparatus of claim 1, further comprising:

the user interface adapted to receive a Wired Equivalent Privacy (WEP) key for the wireless signal; and

the processing circuit is configured to be responsive to the user interface receiving the WEP key to determine the WEP status of the wireless signal being monitored based on the received WEP key.

7. A method of mobile monitoring comprising:

receving a wireless signal across at least one wireless channel with a handheld mobile wireless monitoring appratus;

selecting a predetermined parameter of the wireless signal to be evaluated using the handheld mobile wireless monitoring appratus;

evaluating the wireless signal to observe the predetermined parameter by the handheld mobile wireless monitoring appratus; and

displaying the evaluated predetermined parameter of the wireless signal via the handheld mobile wireless monitoring appratus;

wherein the evaluated predetermined parameter of the wireless signal is one of a group consisting of data rate, channel bandwith, signal direction, Wired Equivalent Privacy (WEP) number of packets transmitted and number of packet errors.

8. The method of claim 7 wherein the steps of monitoring, selecting, evaluating and displaying are performed at a first predetermined location, and wherein the method further comprises performing the steps of mointoring, selecting, evaluating and displaying at least a second predetermined location, so as to observe the predetermined parameter over a predetermined region comprised of the repective predetermined locations.

9. The method of claim 7 wherein the monitored wireless signals operate under the IEEE 802.11 protocols.

10. The method of claim 7, further comprising:

receiving a Wired Equivalent Privacy (WEP) key; and

determining the WEP status of the wireless signal based on the WEP key.

11. The method of claim 7, further comprising determining a gap in signal coverage exists when the wireless signal is detected and the predetermined parameter is not detected.

12. A handheld apparatus, comprising:

means for receiving a wireless signal;

means for obtaining a predetermined parameter of the wireless signal to monitor;

means for evaluating the predetermined parameter of the wireless signal responsive to the means for obtaining; and

enclosing means for retaining the means for receiving, means for obtaining, and means for evaluating;

wherein the predetermined parameter of the wireless signal to be evaluated is selected from one of a group consisting of data rate, channel bandwith, signal direction, Wired Equivalent Privacy (WEP) number of packets transmitted and number of packet errors.

13. The apparatus of claim 12, further comprising means for displaying the evaluation of the predetermined parameter enclosed within the enclosing means.

14. The apparatus of claim 12, wherein the wireless signal is an IEEE 802.11 protocol compliant signal.