US 11777776

US Patent 11777776, titled "Header repetition in packet-based OFDM systems," was issued to AX Wireless LLC. The patent lists Joon Bae KIM and Marcos C. Tzannes as inventors. The application was filed on September 7, 2022, and the patent was granted and published on October 3, 2023. The priority date for this patent is August 21, 2009.

Abstract:
The patent describes a wireless communication device and method for header repetition. It involves receiving and decoding a wireless packet that can have either a first packet format or a second packet format. The first format includes a first header field carried by a single Orthogonal Frequency Division Multiplexing (OFDM) symbol. The second format includes both the first header field on the first OFDM symbol and a second header field on a subsequent second OFDM symbol, where the second header field is a repetition of the first. The device distinguishes the second packet format from the first by detecting the repeated second header field in the received wireless packet.

Independent Claims Overview:

• Independent Claim 1 (Wireless Communication Device): This claim describes a wireless communication device with a transceiver. This transceiver is designed to receive and decode wireless packets that use one of two formats. In the first format, a header is carried by a single OFDM symbol. In the second format, the same header is carried by a first OFDM symbol, and then a repetition of that header is carried by a second, subsequent OFDM symbol. The device identifies the second format (with the repeated header) by detecting this second, repeated header field in the incoming wireless packet.

  • Dependencies: Claims 2-6 depend on Claim 1.
  • Claim 2: Specifies that both packet formats are used within the same network.
  • Claim 3: States that the device determines the packet uses the second format if the second header field is detected.
  • Claim 4: States that the device determines the packet uses the first format if the second header field is not detected.
  • Claim 5: Clarifies that the header fields contain information necessary for decoding the wireless packet.
  • Claim 6: Clarifies that the header fields contain information about the length of the wireless packet.

• Independent Claim 7 (Wireless Communication Method): This claim describes a method for wireless communication. It involves receiving a wireless packet that, similar to Claim 1, can be in a first format (header on one OFDM symbol) or a second format (header on a first OFDM symbol, followed by a repeated header on a second OFDM symbol). The method decodes this packet and distinguishes the second packet format from the first by detecting the repeated second header field within the received wireless packet.

  • Dependencies: Claims 8-12 depend on Claim 7.
  • Claim 8: Specifies that both packet formats are used within the same network.
  • Claim 9: States that the received wireless packet is determined to use the second format if the second header field is detected.
  • Claim 10: States that the received wireless packet is determined to use the first format if the second header field is not detected.
  • Claim 11: Clarifies that the header fields contain information necessary for decoding the wireless packet.
  • Claim 12: Clarifies that the header fields contain information about the length of the wireless packet.

Litigation Status:
US Patent 11777776 is currently active. The patent family is involved in litigation, with cases filed in various jurisdictions:

• US International Trade Commission (Case: 337-TA-1489)
• US International Trade Commission (Case: 337-TA-3811)
• US Texas Eastern District Court (Case: 4:25-cv-00175)
• US Texas Eastern District Court (Case: 2:26-cv-00086)
• First worldwide family litigation filed (Source: Darts-ip, Family: 43297064, Patent: US11777776(B2))
• US International Trade Commission (Case: 337-TA-1445)
• US Georgia Northern District Court (Case: 1:25-cv-00934)
• US Illinois Northern District Court (Case: 1:26-cv-01174)

There is no specific information from the live USPTO or CAFC 2026 dockets searches that contradicts or provides additional details beyond what is already explicitly stated within the patent document regarding its litigation status. The provided search results for USPTO mainly discuss general search tools and a dataset updated through 2020, which is less current than the litigation entries directly on the Google Patents page for US11777776.