Invalidity dossier
US 6081534
Implementation of mutual rate adaptations in data services between GSM and DECT
Current assignee: Vringo Infrastructure Inc
Added 9/21/2026, 9:42:49 AM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US6081534A
Title: Implementation of mutual rate adaptations in data services between GSM and DECT
Patent number: US6081534A | Application number: US08/659,590 | Inventor: Tuomo Sipila
Assignee (per supplied text): Originally Nokia Mobile Phones Ltd; current assignee listed as Vringo Infrastructure Inc.
Key dates: Priority date 1995-06-07; filing date 1996-06-06; granted/publication date 2000-06-27; anticipated expiration 2016-06-06 (status: Expired – Lifetime).
Purpose: The invention generally relates to operating switching center and base station equipment in data communication networks, and particularly to arranging rate and protocol adaptations needed so that data services provided by a cellular telecommunication system — especially GSM — can be used from a terminal belonging to another cellular telecommunication system, especially DECT.
Plain-language scope: GSM and DECT define data communication protocols and implementation requirements according to common principles, but each system uses different standardized functions for packetizing, encoding, and modulating transferred data. The invention places the rate adaptations and mappings that convert data between the two systems' formats in the base station, advantageously in the DECT base station's interworking unit (IWU), near the system interface. This avoids changing the standardized GSM switching center; the underlying idea is that GSM standards are partly transferred to the DECT system. The approach is stated to apply to any systems where switching center equipment is so rigorously standardized that it cannot be changed, but base station equipment can. The equipment aspect is a base station including means for carrying out these rate adaptations and mappings.
Classification indicators: H04W88/181 (transcoding/rate adaptation devices); H04B7/2659 (TDMA for data rate control).
Source: https://patents.google.com/patent/[US6081534](/patent/US6081534)/en
What the excerpt does not establish: The excerpt is partial and includes an explicit notice that text is omitted. It does not provide the full claims, detailed embodiments, or all referenced standards. It does not independently verify inventorship, assignment accuracy, or legal status, and it provides no substantive prior-art analysis. I did not research litigation, ownership transfers, validity, or prior art; the PTAB/litigation links in the source are noted only as present, not evaluated. Publication number, dates, and assignee details above are reproduced from the supplied text without independent correction or verification.
Generated 10/1/2026, 10:01:55 PM
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Litigation summary
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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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