Date: Thu, 6 May 2004 16:22:43 +0200 From: Juan Rodriguez Hervella <jrh@it.uc3m.es> To: freebsd-net@freebsd.org Subject: Re: wireless support of roaming between subnets ? Message-ID: <200405061622.43343.jrh@it.uc3m.es> In-Reply-To: <20040506150132.2d545eda@localhost> References: <200405061342.33101.jrh@it.uc3m.es> <20040506150132.2d545eda@localhost>
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Thank you very much for your reply....see below On Thursday 06 May 2004 15:01, Marco Molteni wrote: > Hi Juan, > > On Thu, 6 May 2004 Juan Rodriguez Hervella <jrh@it.uc3m.es> wrote: > > Hello, > > > > I'd like to try on some changes that I've made in our VoIP > > testbed for mobility support at the application layer. > > > > If the user requires support for seamless voice communication during > > active call sessions on the mobile UA, it is imperative that the > > wireless LAN setup should support roaming across subnets, i.e. the > > mobile host should obtain a different IP address if it reassociates > > itself with an Access Point (AP) in a different subnet. > > I don't understand... > > If you want to keep your session at a layer above IP, you must > *not* change IP address when you roam. You can achieve this with > Mobile IP. I don't know about MIPv4, but MIPv6 is supported by > KAME (http://www.kame.net/) I don't wanna use MIP, what Im trying to test is a simple modification to the UA to re-register when his IP address changes. The soft hand-off implementation has been based on the call flow for sending Re-INVITE in case of IP address change, as you can read here: http://www.iptel.org/info/players/ietf/callflows/draft-ietf-sipping-basic-call-flows-01.txt (look for "Session with re-INVITE (IP Address Change)................62") I haven't tested it yet, I have the bad habit of asking before trying it I will read your references, thank you again ! > > I would suggest trying the KAME mailing list. > > Regarding seamless handover and similar stuff, you should check the > various IETF working groups, like > MIPv6 Signaling and Handoff Optimization (mipshop) > http://www.ietf.org/html.charters/mipshop-charter.html > > Otherwise, if you really want to do what you stated: > > the mobile host should obtain a different IP address > > you are already all set for this: when the 802.11 card associates, > you trigger a DHCP request to get a new address. > > Have also a look at the following thread: > http://docs.FreeBSD.org/cgi/mid.cgi?39FE23FA-7F75-11D8-8F99-000A95CDA38A > > [..] > > > Where is it coded the wireless support on FreeBSD ? I'd like > > to use FreeBSD-4.9 if that is possible....Besides, do I need to > > try to apply the previous patch to support roaming ? Any > > pointer or suggestion will be useful, of course. > > the patch you are referring to is for linux, so you cannot apply it > to fbsd ;-) > > wireless support in fbsd uses a new unified framework called "wlan", start > with "man wlan" on a freebsd-current machine, or look at > http://www.freebsd.org/cgi/man.cgi > > source is at > /usr/src/sys/net80211/ > > Don't know about 4-stable. > > marco > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" -- ****** JFRH ****** We are all worms. But I do believe I am a glowworm. -- Winston Churchill
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