Invalidity dossier
US 5652751
Architecture for mobile radio networks with dynamically changing topology using virtual subnets
Current assignee: Tamiras Per Pte Ltd LLC
Added 9/23/2026, 5:27:25 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US5652751A
Title: Architecture for mobile radio networks with dynamically changing topology using virtual subnets
Patent number / application: US5652751A; Application US08/624,730
Inventor: Jacob Sharony
Assignee: Original assignee Hazeltine Corp; current assignee listed as Tamiras Per Pte Ltd LLC (per the source; a legal analysis is disclaimed there).
Key dates: Priority/filing 1996-03-26; granted/publication 1997-07-29; anticipated expiration 2016-03-26. Status: Expired – Lifetime.
Purpose: The invention addresses communications networks whose nodes undergo dynamically changing topology, such as mobile radio (peer-to-peer packet radio) networks without a wired backbone or central administration. A stated problem is adapting to topology changes caused by node movement, requiring changes in both channel assignment and routing. Objects include an efficient logical topology and routing procedure with high throughput, fault tolerance, and low delay, suitable for mobile computing and multimedia (voice/video/data) applications.
Plain-language scope: The network is partitioned into physical subnets, each containing nodes in relatively close proximity. Each node of each physical subnet is affiliated with a corresponding node of every other physical subnet, forming regional virtual subnets spanning the physical subnets' local areas. Node affiliation can change dynamically. Routing a path from a source node in one physical subnet to a destination node in another occurs in two transmission phases: parts of the path route within physical subnet(s) in a first phase, and remaining parts route within virtual subnet(s) in a second phase. A node structure includes transmitter/receiver means, processor means, and means for performing the partitioning, affiliation, and two-phase routing. Figures depict the partitioned network, a node block diagram, node location updating/tracking, shortest-path and long-path routing procedures, and a 16-node example.
Source: https://patents.google.com/patent/[US5652751](/patent/US5652751)/en
What the excerpt does not establish: Full claim language, the complete description, all drawing details, and the omitted portion of the specification. It also does not establish the patent's validity, litigation history, or prior art beyond the listed classification codes and keywords.
Generated 10/1/2026, 9:43:36 PM
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PTAB challenges
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Assignment history
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Prior art
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Derivative works
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