Re: [multipathtcp] IPR Disclosure: Georg Hampel's Statement about IPR related to draft-ietf-mptcp-multiaddressed-09 belonging to Asankya Networks
Mark Handley <M.Handley@cs.ucl.ac.uk> Wed, 01 August 2012 00:08 UTC
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From: Mark Handley <M.Handley@cs.ucl.ac.uk>
Date: Wed, 01 Aug 2012 01:08:03 +0100
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Subject: Re: [multipathtcp] IPR Disclosure: Georg Hampel's Statement about IPR related to draft-ietf-mptcp-multiaddressed-09 belonging to Asankya Networks
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This one is United States Patent Application 20080062879 from Raghupathy Sivakumar et al. It seems unlikely that a pure end-system implementation of MPTCP would infringe the claims of this patent application, as they refer only to a transport-level proxy. If this patent were asserted against an MPTCP end-system implementation, the claim construction would have to be so broad that the mass of MPTCP prior art would be highly likely to invalidate the patent. Sivakumar was one of the authors of pTCP, from 2002 or so, that is part of that prior art. They don't cite pTCP, so they cannot believe it is directly relevant. A proxy implementation of MPTCP might infringe though. If the patent examiner is smart, he/she will reject the application because a conventional server load balancer would infringe claim 1 (and probably many of the other claims), and server load balancers pre-date the priority date by a lot. There seems to be plenty of other prior art too. For example: http://dl.acm.org/citation.cfm?id=1104348 But patent examiners don't really have time to search the literature. - Mark On 31 July 2012 23:13, IETF Secretariat <ietf-ipr@ietf.org> wrote: > > Dear Alan Ford, Costin Raiciu, Mark J. Handley, Olivier Bonaventure: > > An IPR disclosure that pertains to your Internet-Draft entitled "TCP Extensions > for Multipath Operation with Multiple Addresses" (draft-ietf-mptcp- > multiaddressed) was submitted to the IETF Secretariat on 2012-07-31 and has been > posted on the "IETF Page of Intellectual Property Rights Disclosures" > (https://datatracker.ietf.org/ipr/1843/). The title of the IPR disclosure is > "Georg Hampel's Statement about IPR related to draft-ietf-mptcp- > multiaddressed-09 belonging to Asankya Networks.""); > > The IETF Secretariat >
- [multipathtcp] IPR Disclosure: Georg Hampel's Sta… IETF Secretariat
- Re: [multipathtcp] IPR Disclosure: Georg Hampel's… Mark Handley