Invalidity dossier
US 8279876
Data service apparatus and method in heterogeneous wireless networks
Current assignee: Samsung Electronics Co Ltd
Added 9/23/2026, 4:50:00 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US 8,279,876 B2
Title: Data service apparatus and method in heterogeneous wireless networks
Assignee: Samsung Electronics Co., Ltd. (original assignee also [Samsung Electronics Co.](/litigations/by-defendant/Samsung%20Electronics%20Co.), Ltd.)
Key dates: Priority date 2005-10-14; filing date 2006-10-16; publication date (grant) 2012-10-02; legal status listed as "Expired – Fee Related," with an adjusted expiration of 2030-06-04. Publication US20070116012A1 appeared 2007-05-24.
Inventors: Young-Bin Chang, Eun-Taek Lim, Jung-Min Ro, Jae-Hyuk Jang, Dong-Seek Park, Young-Kwon Cho, and Joon-Young Choi. Application number US11/581,308.
Purpose: The patent addresses radio environments mixing multiple heterogeneous wireless networks (e.g., 2G/3G cellular such as WCDMA/HSDPA/CDMA2000/1×EVDO/1×EVDV, WMAN/IEEE 802.16, and WLAN/IEEE 802.11). Stated objects are to provide a data service to a Mobile Station (MS) concurrently through multiple heterogeneous networks, deliver a seamless data service, ensure Quality of Service (QoS), prevent frequent handoffs, and reduce signaling overhead caused by frequent handoffs.
Plain-language scope: Rather than switching the MS to a single best network via vertical handoff or radio reconfiguration, an "IP sublayer" distributes IP packets from an IP layer across one or more accessible wireless networks, delivering each distributed packet to the corresponding network's MAC layer. At the MS, MAC layers of different networks feed an IP sublayer that recombines received IP subpackets into an IP packet for the IP layer. Related methods cover: determining accessible networks and distributing IP packets; an MS measuring and reporting channel qualities, receiving subpackets, and recombining them; DL transmission coordinated by an IP packet controller; and UL transmission where the MS reports channel quality and data amount, the controller sends an uplink scheduling control message, and networks send channel allocation messages. Classifications include H04W48/18, H04L69/14, H04W28/06, and H04W80/04. Figures 2–10 depict architecture, protocol stack, IP sublayer functions, packet division/combination, and DL/UL flow procedures.
Source: https://patents.google.com/patent/US8279876/en
Not established by the excerpt: The full claims, complete specification text, detailed embodiments, and any independent verification of legal status, assignee accuracy, or dates are not established here; the excerpt states these are assumptions or partial content.
Generated 10/1/2026, 9:44:07 PM
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Litigation summary
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Assignment history
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Prior art
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