Re: [Enum] ENUM Query
Bernie Hoeneisen <bernie@ietf.hoeneisen.ch> Mon, 09 March 2020 14:49 UTC
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Date: Mon, 09 Mar 2020 15:49:48 +0100
From: Bernie Hoeneisen <bernie@ietf.hoeneisen.ch>
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To: Wayne Cutler <wcutler@gsma.com>
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Subject: Re: [Enum] ENUM Query
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Hi Wayne My comments inline. On Mon, 9 Mar 2020, Wayne Cutler wrote: > So, we are after a mechanism to get a SIP URI for the RCS Messaging > Services, and these services comprise things like 1:1 Chat, File > Transfer, Geolocation Push etc. > > Regarding the differences between RCS Messaging and im/unifmsg, I would > say that :- > 1) im allows users to send and receive typically short, often textual > messages in near real-time - which sounds a lot like RCS Chat - and > returns an IM URI. So, I think that RCS is more general than im and also > the need to translate from the im URI to a SIP URI is an additional > minor nuisance. > 2) unifmsg is about having a unified (voice/video) mailbox capability in > the event of a user being unreachable. The RCS services aren't really > about the user being unreachable and so this is not really a good fit > IMO. Thanks for clarification. > So, I think the proposal to have a new Application-Based Enumservice > seems reasonable to me. What would be the next steps? Writing an > Internet Draft presumably? RFC 6117 defines the process in details cf. https://tools.ietf.org/html/rfc6117#section-6 > Regarding the suggestion to also take a similar approach for MMTEL, I > think there are backwards compatibility issues as there are > implementations already out there that use the Protocol-Based > Enumservice "sip" for MMTEL. Therefore, this is something we wouldn't > want to do. Not sure this creates a new backward compatibility issue. AFAICT, using two new Enumservices, new systems would be more efficient and less prone to ambiguities. And in the long run you'd get a clean system. - for old systems you probably need to maintain "sip" (only) (provision and lookup). You may add a recommendation to at least provision also the new Enumservices "mmtel:sip" and "rcs:sip" (pointing to the same as "sip"), which is easy to implement. - for new systems you could specify: - Lookup: use "rcs:sip" or "mmtel:sip" (with priority); use "sip", only if no hit with rcs or mmtel (fallback) - Provision: "rcs:sip" and "mmtel:sip" would point to the respecive services, while "sip" could be provisioned to help old systems to find the correct service, e.g. a redirection service (or alike) or a system that can deal with requests for the "wrong" (mmtel vs. rcs) service. You could deprecate "sip" Enumservice and after a long enough transition period, you may get rid of the "sip" Enumservice altogether. Does this make sense for your environment? cheers Bernie
- [Enum] ENUM Query Wayne Cutler
- Re: [Enum] ENUM Query Brian Rosen
- Re: [Enum] ENUM Query Wayne Cutler
- Re: [Enum] ENUM Query Bernie Hoeneisen
- Re: [Enum] ENUM Query Wayne Cutler
- Re: [Enum] ENUM Query Bernie Hoeneisen
- Re: [Enum] ENUM Query Wayne Cutler
- Re: [Enum] ENUM Query Bernie Hoeneisen
- Re: [Enum] ENUM Query Brian Rosen
- Re: [Enum] ENUM Query Wayne Cutler
- Re: [Enum] ENUM Query Brian Rosen
- Re: [Enum] ENUM Query Bernie Hoeneisen
- Re: [Enum] ENUM Query Wayne Cutler
- Re: [Enum] ENUM Query Brian Rosen
- Re: [Enum] ENUM Query Richard Shockey
- Re: [Enum] ENUM Query Brian Rosen
- Re: [Enum] ENUM Query Jim Reid
- Re: [Enum] ENUM Query Brian Rosen
- Re: [Enum] ENUM Query Bernie Hoeneisen
- Re: [Enum] ENUM Query Richard Shockey
- Re: [Enum] ENUM Query Brian Rosen