Mahender Reddy Vangati

US Patent:

7873367, Jan 18, 2011

Filed:

Jun 28, 2007

Appl. No.:

11/770400

Inventors:

Ajay Malik - Santa Clara CA, US
Mahender Vangati - San Jose CA, US

Assignee:

Symbol Technologies, Inc. - Holtsville NY

International Classification:

H04W 24/00

US Classification:

4554561, 4554565

Abstract:

Methods and systems are provided for determining the location of a first wireless device (e. g. , a mobile unit) within a wireless network comprising a plurality of second wireless devices (e. g. , access points). The method includes identifying an overlap area corresponding to the intersection of RF ranges for the one or more second wireless devices then computing a set of signal strength values, each associated with a measure of RF signal strength (e. g. , RSSI) received by the plurality of second wireless devices from the first wireless device. A decision metric is evaluated for a plurality of locations within the overlap area based on the set of signal strength values. The location of the first wireless device is determined by selecting, from the plurality of locations, a location having the optimum value of the decision metric within the overlap area. The decision metric may utilize a minimum mean square error (MMSE) calculation. A weighting function may be used to remove redundant or weak signal strength values.

US Patent:

8027266, Sep 27, 2011

Filed:

Aug 31, 2007

Appl. No.:

11/848689

Inventors:

Mahender Vangati - San Jose CA, US
Ajay Malik - Santa Clara CA, US

Assignee:

Symbol Technologies, Inc. - Holtsville NY

International Classification:

H04L 12/26
H04L 12/66
H04W 40/00
G06F 15/16

US Classification:

370252, 370248, 370328, 370352, 455 671, 455 6711, 455431, 455446, 455567, 709219, 709230, 709246, 709431, 703 1, 703 15

Abstract:

A method for displaying RF coverage information includes providing formatting data for displaying the radio frequency coverage information on a client. The formatting data is executed on the client. First radio frequency coverage raw data is provided to the client. The first radio frequency coverage raw data is utilized by the formatting data to construct an overall radio frequency coverage representation of a site. Subject to a subsequent request from the client, second radio frequency coverage raw data representative of radio frequency coverage is provided for a portion of the site. The second radio frequency coverage raw data is utilized by the formatting data on a supplemental basis.

US Patent:

8185121, May 22, 2012

Filed:

Aug 31, 2007

Appl. No.:

11/848674

Inventors:

Mahender Vangati - San Jose CA, US

Assignee:

Symbol Technologies, Inc. - Holtsville NY

International Classification:

H04W 40/00
H04W 4/00

US Classification:

455446, 455449, 370338

Abstract:

A method for optimizing RF coverage includes dividing a floor plan according to a plurality of grids. Radio frequency coverage for each of the plurality of grids is calculated to render a plurality of coverages. First data representative of the plurality of coverage grids is provided to a client. Second data representative of an incremental change in radio frequency coverage for a first grid of the plurality of grids is provided to the client.

US Patent:

20070254618, Nov 1, 2007

Filed:

Jul 27, 2006

Appl. No.:

11/495290

Inventors:

Mahender Vangati - San Jose CA, US

International Classification:

H04B 1/16

US Classification:

455338

Abstract:

A WLAN system enables network modeling and management through an easy-to-navigate tree hierarchy structure. A method for visually representing components at multiple sites within a wireless local area network (WLAN) includes providing a console coupled to the WLAN; organizing, through the console, the components in the multiple sites in a hierarchical tree structure, wherein the tree structure includes a root node, a plurality of site nodes for which the root node is a parent node, and at least one leaf node associated with one of the root nodes, wherein the at least one leaf node corresponds to one of the components; and displaying, via the console, hierarchical tree structure of the components.

US Patent:

20080267145, Oct 30, 2008

Filed:

Apr 27, 2007

Appl. No.:

11/741190

Inventors:

Mahender Vangati - San Jose CA, US

Assignee:

SYMBOL TECHNOLOGIES, INC. - Holtsville NY

International Classification:

H04Q 7/24

US Classification:

370338

Abstract:

A WLAN system and method enables network modeling and management through an easy-to-use user interface. A console coupled to the WLAN is configured to display a first set of graphical entities representing locations of the multiple sites in a geographical view, and display a second set of graphical entities in a site view representing a subset of the components selected in response to user input. An XML format may be used to display the various views on a browser operating within the console.

US Patent:

20080288432, Nov 20, 2008

Filed:

Oct 22, 2007

Appl. No.:

11/876561

Inventors:

Ajay MALIK - San Jose CA, US
Mahender Vangati - San Jose CA, US

International Classification:

G06N 5/02

US Classification:

706 47

Abstract:

A method is used to fix wireless network problems. The method comprises receiving at least one parameter relating to a wireless network. The method comprises comparing the at least one parameter with a database of problem identities. Each problem identity has a set of criteria. The at least one parameter relates to the set of criteria. The method comprises determining at least one problem with the wireless network based on the comparison of the at least one parameter with the problem identities.

US Patent:

20090005063, Jan 1, 2009

Filed:

Jun 28, 2007

Appl. No.:

11/770387

Inventors:

Ajay MALIK - Santa Clara CA, US
Mahender VANGATI - San Jose CA, US

Assignee:

SYMBOL TECHNOLOGIES, INC. - Holtsville NY

International Classification:

H04Q 7/20

US Classification:

4554561

Abstract:

Methods and systems are provided for determining the location of a first wireless device (e.g., a mobile unit) within a wireless network comprising a second wireless device (e.g., an access point). The method includes determining a signal strength contour associated with RF communication between the access point and the mobile unit, and adding a correction factor to the signal strength contour to produce a corrected signal strength contour, wherein the correction factor includes the sums of the differences between the transmit power and the antenna gain associated with the mobile unit and the access point. In an alternate scheme involving stored fingerprint data, a correction factor is introduced based on the differences between antenna gains and transmit power associated with the mobile unit under consideration and the mobile unit used for generating the fingerprint data. The systems and methods disclosed herein are applicable, for example, to networks operating in accordance with 802.11, RFID, WiMax, WAN, Bluetooth, Zigbee, UWB, and the like.

US Patent:

20090043666, Feb 12, 2009

Filed:

Aug 10, 2007

Appl. No.:

11/837048

Inventors:

Ajay MALIK - Santa Clara CA, US
Mahender VANGATI - San Jose CA, US

Assignee:

SYMBOL TECHNOLOGIES, INC. - Holtsville NY

International Classification:

G06Q 10/00
G06F 17/30
G06Q 30/00

US Classification:

705 26, 705 1

Abstract:

A wireless network architecture planning system and related operating methods are disclosed herein. The planning system generates a report for a recommended wireless network architecture for a proposed floor plan, where the report contains product identifier codes (e.g., SKUs) for wireless infrastructure components and related accessories. An embodiment of the planning system executes a computer-implemented method that receives floor plan data corresponding to the site, produces a proposed wireless network architecture for the site, obtains product identifier codes corresponding to wireless infrastructure components needed to deploy the recommended wireless network architecture, and generates a report that lists the product identifier codes.