Invalidity dossier
US 6549938
Added 9/23/2026, 5:54:01 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US6549938B1
Title: System and method for prioritizing multicast packets in a network service class utilizing a priority-based quality of service
Patent number: US6549938B1
Application number: US09/209,182
Inventors: Matti Kalevi Kilkki; Jussi Pekka Olavi Ruutu
Original assignee: Nokia Inc (listed current assignees: Nokia Technologies Oy; Vringo Infrastructure Inc)
Priority/filing date: 1998-12-10
Publication (grant) date: 2003-04-15
Legal status (as listed): Expired – Lifetime (anticipated expiration 2018-12-10)
Purpose: The invention relates generally to network communications systems and, more particularly, to a method and apparatus for providing packet acceptance and rejection determinations on a multi-user basis, for multicast transmissions implementing a priority-based quality of service.
Plain-language scope: The supplied text describes the context of ATM (asynchronous transfer mode) service architecture, which provides predefined quality of service classes (service categories) defined by QoS parameters. Listed categories include constant bit rate (CBR), real-time variable bit rate (rt-VBR), non-real-time variable bit rate (nrt-VBR), unspecified bit rate (UBR), and available bit rate (ABR). For CBR, the excerpt names QoS parameters including peak cell rate (PCR), cell loss rate (CLR), cell transfer delay (CTD), and cell delay variation (CDV). Against this background, the invention addresses deciding whether to accept or reject packets for multicast transmission on a multi-user basis under a priority-based QoS.
Classifications listed: H04L49/00, H04L49/30, H04L49/3081, H04L49/20, H04L49/201, H04L49/203, H04Q11/00, H04Q11/04, H04Q11/0428, H04Q11/0478, H04L12/00, H04L12/54, H04L12/56, H04L12/5601, and related H04L2012/* subclasses (including multicast/broadcast, QoS, and priority/marking/classes).
What the excerpt does not establish: The supplied text is explicitly an excerpt with omitted portions ("consult the source for omitted text"). It does not include the claims, the detailed description of the acceptance/rejection mechanism, any figures, or the abstract. It also does not set out specific algorithms, thresholds, or embodiments. No litigation, ownership-transfer, validity, or prior-art analysis is presented or inferred here.
Source: https://patents.google.com/patent/[US6549938](/patent/US6549938)/en
Generated 10/1/2026, 9:43:11 PM
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Litigation summary
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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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