US 10917272

US Patent 10,917,272: Variable Header Repetition in Wireless OFDM Networks

Title: Non-transitory computer-readable information storage media for variable header repetition in a wireless OFDM network

Assignee: AX Wireless LLC (Current Assignee), Applied Transform LLC (Original Assignee)

Inventors: Joon Bae KIM, Marcos C. Tzannes

Filing Date: February 3, 2020

Issue Date: February 9, 2021

Abstract:
A non-transitory computer-readable information storage media for use within a wireless Orthogonal Frequency Division Multiplexing (OFDM) network that causes the transmission or reception of two packet types. The first packet type includes a header field with two distinct parts, each comprising a different set of header bits. These two parts are transmitted or received using two OFDM symbols. The second packet type features a header field with four parts. In this second type, the first and second parts contain the same first set of header bits, and the third and fourth parts contain the same second set of header bits. These four parts of the header field are transmitted or received using four OFDM symbols. The second packet type is designed to offer more reliable transmission or reception compared to the first packet type.

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Plain-Language Overview of Independent Claims:

US Patent 10,917,272 contains two independent claims: Claim 1 (directed to a method of transmission) and Claim 11 (directed to a method of reception).

Independent Claim 1: Method of Transmission
This claim describes a method implemented by a transceiver with one or more processors, causing it to transmit two different types of packets in a wireless OFDM network.

1. First Packet Type (Lower Repetition):

   • The transmitter generates a first packet with a header field having two distinct parts, each containing different header bits.
   • An encoder and modulator generate a first OFDM symbol for the first header part and a second OFDM symbol for the second header part.
   • This first packet type is then transmitted.

2. Second Packet Type (Higher Repetition for Reliability):

   • The transmitter also generates a second packet with a header field having four parts.
   • The first and second parts of this second header field contain the same first set of header bits.
   • The third and fourth parts of this second header field contain the same second set of header bits.
   • An encoder and modulator generate four OFDM symbols: the first for the first part, the second for the second part, the third for the third part, and the fourth for the fourth part.
   • Crucially, the second set of header bits (in the second OFDM symbol) is transmitted in a different order than the first set of header bits (in the first OFDM symbol). Similarly, the fourth set of header bits (in the fourth OFDM symbol) is transmitted in a different order than the third set of header bits (in the third OFDM symbol).
   • This second packet type is then transmitted over the wireless channel.

Independent Claim 11: Method of Reception
This claim describes a corresponding method implemented by a transceiver with one or more processors, causing it to receive the two different types of packets in a wireless OFDM network.

1. First Packet Type (Lower Repetition):

   • The receiver receives a first packet with a header field having two distinct parts, each containing different header bits.
   • A demodulator demodulates a first OFDM symbol (corresponding to the first header part) and a second OFDM symbol (corresponding to the second header part).

2. Second Packet Type (Higher Repetition for Reliability):

   • The receiver receives a second packet with a header field having four parts.
   • The first and second parts of this second header field contain the same first set of header bits.
   • The third and fourth parts of this second header field contain the same second set of header bits.
   • A demodulator demodulates four OFDM symbols: the first for the first part, the second for the second part, the third for the third part, and the fourth for the fourth part.
   • Similar to the transmission method, the second set of header bits received in the second OFDM symbol is in a different order than the first set received in the first OFDM symbol. Also, the fourth set of header bits received in the fourth OFDM symbol is in a different order than the third set received in the third OFDM symbol.

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CAFC 2026 Dockets:

A search for US patent 10917272 specifically within CAFC 2026 dockets did not yield direct results indicating active cases for this patent in the Federal Circuit for 2026. The Google Patents page for US10917272B2 indicates "Family has litigation" with several US cases filed in Texas Eastern District Court and PTAB cases. However, these are district court and PTAB cases, not specifically CAFC dockets for 2026. While there is general information about CAFC activity in 2026, no specific docket entries for US10917272 were found in the provided search results.

I do not have authoritative information on specific CAFC 2026 dockets for US10917272.
I found some general information on how to search USPTO public search and Patent Center, but did not find specific litigation records for the patent within the USPTO search interface itself. The Google Patents page provided litigation data from Unified Patents.