Invalidity dossier
US 12512947
Added 9/23/2026, 10:20:39 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US12512947B2
Title: Control information for multi-user transmissions in WLAN systems
Source: https://patents.google.com/patent/[US12512947](/patent/US12512947)/en
Bibliographic data (per supplied text): Publication US12512947B2; application US18/348,728 (US202318348728A); filed 2023-07-07; published as US20230361969A1 on 2023-11-09; granted/publication date 2025-12-30; priority date listed as 2015-08-07; anticipated expiration 2036-08-08; legal status "Active." Original and current assignee: Atlas Global Technologies LLC. Inventors: Yujin Noh, Daewon Lee, Sungho Moon, Young Hoon Kwon. The source notes a worldwide family litigation entry (Darts-ip link).
Purpose. The description addresses control information for multi-user transmissions in wireless local area network (WLAN) systems, particularly high efficiency (HE) WLAN (IEEE 802.11ax, "HEW"). An access point's scheduler assigns resource units (RUs) to stations in OFDMA-based communication, and the amount of control information varies with the technologies applicable to each assigned RU. The subject technology provides an HE signal-B (HE-SIG-B) encoding structure.
Plain-language scope (from the excerpt). A station receives a frame from an access point, where the frame includes a HE-SIG-B field arranged in a plurality of content channels occupying respective sub-bands of the frame's channel bandwidth, and where the station is allocated a resource unit. A first content channel carries resource-unit allocation information for a first set of STAs; a second content channel carries allocation information for another set of STAs. A type subfield may indicate the type of station-specific information (e.g., single-user vs. multi-user) and help determine sizes of STA-specific information and the entire HE-SIG-B length. Figures cover numerology for 20/40/80 MHz, HE-SIG-B coding structures for 40/80/160 MHz, a "special 26" RU, BCC block encoding, OFDM-symbol mapping of that RU, duplicated/pairwise RUs, non-continuous RUs in OFDMA, repeated-RU PPDU representations, symmetric signal mapping, and uplink methods.
What the excerpt does not establish: the complete claims, full specification, exact priority chain, the nature or outcome of any litigation, and any ownership transfers beyond the listed assignee.
Generated 10/1/2026, 9:33:32 PM
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Litigation summary
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Proceedings on file (0)
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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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