Invalidity dossier
US 7301920
System and method for identifying co-channel interference in a radio network
Current assignee: Telecom Network Optimization Inc
Added 9/23/2026, 4:42:04 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 7,301,920 B2
Title: "System and method for identifying co-channel interference in a radio network"
Assignee / Inventors: Original assignee Telecom Network Optimization Inc., later listed with current assignees Telecom Network Optimization Inc. and PCTel Inc. Inventors: Alan David Sanders, Perry Simon Lewars Linder, and Dhaval Dave′.
Key dates (as listed): Priority date 2002-10-25; application US10/694,449 filed 2003-10-27; publication US2004/0132457A1 on 2004-07-08; patent granted/publication 2007-11-27. Status: Ceased; adjusted expiration 2026-07-06. A related RE issue (USRE43871E1) is noted from priority to US13/090,772.
Purpose (from the supplied text): Cellular systems divide a service area into cells and reuse channels with geographic separation; too little separation causes co-channel interference. The invention concerns the field of telecommunication network design and analysis, and particularly "optimization and planning of frequency reuse based telecommunication networks by performing a signal presence analysis." An identified problem: field signal measurements must distinguish valid channels from interfering channels, and "if the source of a signal cannot be identified... then the determination of co-channel interference cannot be accomplished."
Plain-language scope (per supplied excerpt): The disclosed approach is a method and system for taking field measurements in a cellular network, analyzing signal presence, and identifying the source of received signals (e.g., the transmitting cell tower) so co-channel interference can be determined. It addresses limitations of drive tests measuring received signal strength and of model-predicted performance—where measured and predicted characteristics differ and average errors reportedly range from 9 to 12 dB.
Notes and limits of this excerpt: The classification is H04W24/00, H04W24/08, H04W64/00. The excerpted text includes definitions for AMPS, N-AMPS, TDMA, GSM, CDMA, Edge, 3G, and PCS, but the claims and detailed embodiments are not reliably reproduced here. Accordingly, exact apparatus elements, algorithm steps, and the full scope of any claim are not established by this excerpt.
Generated 10/1/2026, 9:44:17 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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