Mark F Schrader

US Patent:

7486647, Feb 3, 2009

Filed:

Jun 3, 2004

Appl. No.:

10/859355

Inventors:

Mark E. Schrader - Rochester NY, US
Allen D. Heberling - Penfield NY, US

Assignee:

Aster Wireless - West Henrietta NY

International Classification:

H04B 7/212
H04J 3/06

US Classification:

370337, 370347, 370350, 370458, 370503

Abstract:

A method of controlling access to a network media by a plurality of stations, the method including determining a number of time slots; determining a number of slot cycles for each time slot, at least one of the time slots having more than one slot cycle; assigning each station one or more slot cycles in one or more time slots; and operating each of the stations by initializing an access timer to time out at the beginning of the station's assigned slot cycle(s) and transmitting data during the assigned slot cycle(s), the access timer being stopped whenever a station transmits over the network, and restarted at the end of transmission.

US Patent:

20050063419, Mar 24, 2005

Filed:

Jul 23, 2004

Appl. No.:

10/900586

Inventors:

Mark Schrader - Rochester NY, US
Eric Frayer - New York NY, US

International Classification:

H04L012/403

US Classification:

370466000, 370329000

Abstract:

A method of controlling and sharing access to a wireless network wherein some stations of the network may be out of range of other stations of the network. The method includes the steps of: first, each station periodically transmits a beacon containing a bit map having a bit location for every station on the network and monitoring the beacons of stations within its range; second, in response to a beacon being no longer detected, each station transmits a bit map containing an indication of only the stations that it can still receive; third, on receiving a bit map with not all stations indicated, each station responds by adding stations that it can receive to the received bit map and transmitting the updated bit map; fourth, each station repeats the third step until the updated bit map indicates that all stations are still in the network or that a station is missing from the network; and finally, if a station is indicated to be missing from the network, each station updates the bit map. Through the application of these steps, the invention controls access to the network without a global master. The present invention has the advantage of controlling a network without the need for a central master station, and does not require continuous global knowledge of the topology of the network.

US Patent:

20050243765, Nov 3, 2005

Filed:

Jul 11, 2005

Appl. No.:

11/178697

Inventors:

Mark Schrader - Rochester NY, US
Eric Frayer - New York NY, US

International Classification:

H04Q007/00

US Classification:

370328000

Abstract:

A method of distributed control of a wireless mesh network without knowledge of global topology. The method includes: a station joining the network with any current member by propagating the join-request, or two meshes merging using the steps of: one mesh joining the other as a whole and then re-synchronizing its timing. The method further includes: first, each station periodically transmits a beacon; second, in response to a beacon being no longer detected, a station transmitting a bitmap of stations that it can still receive; third, each station responds by adding stations that it can receive with all of the bitmaps received from other members, and retransmitting the updated bitmap; fourth, after time for all stations to respond, all stations base current membership on the bitmap. The method further includes: determining sharable time slots that will not interfere with neighbors or other slot sharers, using and then releasing those slots.

US Patent:

20090028174, Jan 29, 2009

Filed:

Sep 23, 2008

Appl. No.:

12/232756

Inventors:

Mark E. Schrader - Rochester NY, US
Allen D. Heberling - Penfield NY, US

Assignee:

Aster Wireless - W. Henrietta NY

International Classification:

H04J 3/00

US Classification:

370442

Abstract:

A method of controlling access to a network media by a plurality of stations, the method including determining a number of time slots; determining a number of slot cycles for each time slot, at least one of the time slots having more than one slot cycle; assigning each station one or more slot cycles in one or more time slots; and operating each of the stations by initializing an access timer to time out at the beginning of the station's assigned slot cycle(s) and transmitting data during the assigned slot cycle(s), the access timer being stopped whenever a station transmits over the network, and restarted at the end of transmission.

US Patent:

62922122, Sep 18, 2001

Filed:

Dec 23, 1994

Appl. No.:

8/362725

Inventors:

Joseph P. Zigadlo - Rochester NY
Carl L. Holden - Rochester NY
Mark E. Schrader - Rochester NY
Richard M. Vogel - Pittsford NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H04N 964
H04N 907
H04N 314

US Classification:

348 33

Abstract:

An infrared digital electronic camera includes a solid state color image sensor having an array of image sensing elements and an array of color filter elements including infrared color filter elements arranged over the image sensing elements for producing a color image signal. A signal processing circuit processes the color image signals from the image sensor to produce a false color image signal.