InterDigital Inc (IDCC)

[Gamco]

United States Patent 6,507,600
Schilling January 14, 2003

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Frequency hopping code division multiple access system and method


Abstract
The present invention is a communication system and method having a base station for communication with multiple remote units. The system comprises a base station which utilizes a plurality of sets of frequencies for selectively communicating with remote units in a predefined coverage area. The coverage area is divided into N concentric regions, where each concentric region is assigned one of the plurality of frequency sets such that for any given concentric region a different frequency set is assigned than the frequency sets assigned to all other adjacent concentric regions. The base station includes a means for communicating data to a remote unit over the set of frequencies associated with the respective concentric region as the remote unit travels from one concentric region to another. The system also comprises at least one remote unit having means for communicating with the base station over the set of frequencies associated with the respective concentric region as the remote unit travels from one concentric region to another.


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Inventors: Schilling; Donald L. (Sands Point, NY)
Assignee: Interdigital Technology Corporation (Wilmington, DE)
Appl. No.: 057333
Filed: October 29, 2001

Current U.S. Class: 375/134; 455/446; 455/561
Intern'l Class: H04B 015/00; H04K 001/00; H04L 027/30
Field of Search: 375/134,132,133,137 455/446,561,450,452 370/328,329,343 342/358



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References Cited [Referenced By]

Gamco