Ilan Kessler from Rockville, MD

Tracking Mobile Users In Wireless Networks
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US Patent:

55241360, Jun 4, 1996
Filed:

Apr 20, 1992
Appl. No.:

7/871252
Inventors:

Amotz Bar-Noy - Bronx NY
Ilan Kessler - Bronx NY
Assignee:

International Business Machines Corporation - Armonk NY
International Classification:

H04M 1100
H04Q 700
H04B 100
US Classification:

379 59
Abstract:

A method and apparatus for efficiently tracking the location of a mobile station in a cellular network, especially in cellular networks having nonuniform traffic distribution. A mobile station reports to a base station only upon entering selected reporting cells. When communication with a mobile station is desired, the station is searched for in the vicinity of the last reporting cell in which the station appeared. The vicinity of a reporting cell is defined as the set of all intersecting cells reachable from the reporting cell without passing through another reporting cell.

Multiaccess Scheme For Mobile Integrated Local Area Networks
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US Patent:

56131984, Mar 18, 1997
Filed:

Mar 13, 1995
Appl. No.:

8/402767
Inventors:

Hamid Ahmadi - Somers NY
Amotz Bar-Noy - Bronx NY
Ilan Kessler - Bronx NY
Arvind Krishna - Briarcliff Manor NY
Assignee:

International Business Machines Corporation - Armonk NY
International Classification:

H04Q 736
US Classification:

455 331
Abstract:

A method of dynamically allocating bandwidth of channels to cells in a communications cellular network according to user demand. Groups of cells are formed so as to minimize interference within each group, and a particular channel is assigned to each of the groups. The bandwidth of each channel then is dynamically allocated by time division to each of the cells in the assigned group according to user demand in each of the cells thereof.

Dynamic Tracking Of Mobile Stations In Wireless Networks
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US Patent:

53902343, Feb 14, 1995
Filed:

Apr 20, 1992
Appl. No.:

7/871253
Inventors:

Amotz Bar-Noy - Bronx NY
Ilan Kessler - Bronx NY
Assignee:

International Business Machines Corporation - Armonk NY
International Classification:

H04M 1100
H04Q 700
US Classification:

379 59
Abstract:

A method of tracking mobile stations in a cellular network. A mobile station will report to a base station only when the mobile station is turned on and only after having made a minimum number of intercellular movements. When communications with a mobile station is desired, the mobile station is searched for only in the neighborhood of the most recent current cell, which is the last cell from which the mobile station reported to the base station.

Radio Communications System With Fault Tolerant Frequency Hopping Synchronization
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US Patent:

54426596, Aug 15, 1995
Filed:

Oct 22, 1993
Appl. No.:

8/142555
Inventors:

Frederick J. Bauchot - Saint-Jeannet, FR
Chia-Chi Huang - Hsinchu, TW
Ilan Kessler - Bronx NY
Kadathur S. Natarajan - Millwood NY
Assignee:

International Business Machines Corporation - Armonk NY
International Classification:

H04B 1713
US Classification:

375202
Abstract:

A method for use in multicellular communication network system of the type having base stations and a plurality of remote stations. The method achieves reliable and fault tolerant synchronization between the stations in a call when a frequency hopping technique is used. The method includes steps for acquiring the frequency hop sequence by remote station and tracking the frequency hop sequence after acquisition in order to stay in synchronism. The method also provides for recovering from loss of synchronism and for staying in synchronism.

Ilan Kessler