US 7742388

Summary of U.S. Patent 7,742,388

Title: Packet generation systems and methods

Assignee: Fleet Connect Solutions LLC

Inventors: Daniel Shearer, Mark A. Webster

Filing Date: July 20, 2005

Issue Date: June 22, 2010

Abstract: Disclosed herein are various embodiments of methods, systems, and apparatus for increasing packet generation in a digital communication system. In one exemplary method embodiment, subcarriers are added to a packet in a wireless local area network transmission to increase the data rate.

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Plain-Language Overview of Independent Claims:

This patent has two independent claims: claim 1 and claim 12.

Claim 1: This claim describes a method for increasing the data-carrying capacity of a network transmission packet. The process involves creating a standard packet that has a "preamble" at the beginning, which acts like a signal to receiving devices. This preamble contains two distinct parts called "training symbols." The key step is to then increase the size of this packet by adding more data-carrying subcarriers specifically to the second training symbol, making it larger than the first. This modified, "extended" packet is then transmitted. In simpler terms, this method boosts the amount of information that can be sent in a single packet by enhancing a specific part of its introductory signal.

Claim 12: This claim outlines a method for generating and transmitting a specific type of data packet. This packet is composed of a preamble and a data portion. The preamble itself has a first and a second training symbol, both of which use modulated subcarriers to carry information. The core of this claim is that the second training symbol is designed to have a greater number of these modulated subcarriers than the first training symbol. This constructed packet is then transmitted. This method focuses on the creation of a packet with a front-loaded, enhanced training signal to potentially improve communication efficiency.

It should be noted that, according to a search of public records, a notice of intent to issue a reexamination certificate to cancel several claims of this patent, including claims 1-9 and 11-13, was entered on March 26, 2026. This indicates that the validity of these claims has been successfully challenged. Information regarding any appeals or final actions by the USPTO was not available in the search results. A search of the CAFC dockets for 2026 did not yield any specific results for this patent number.