Re: [802.21] [DNA] Prefix information for link identification in DNA
Please disregard this second version of my message: it went out by mistake. It
has the wrong definition for the L3 PoA.
My apologies,
Andrea
Andrea Francini wrote:
>
> Trying to finalize one part of the ongoing discussion: the PoA definition.
>
> I have the impression that some people include the capability of supporting MIH
> in the definition of PoA while other people don't, giving it only a network
> connectivity value.
>
> What about the following:
>
> 1. General definition of PoA:
>
> "PoA is the first point in the network that acts as the UE counterpart for a
> specific type of communication relationship (e.g., L2, L3, MIH)."
>
> 2. Accordingly, the following three definitions could be added:
>
> "L2 PoA is the network-side endpoint of the L2 link by which the UE connects to
> the network."
>
> "L3 PoA is the closest network counterpart for the UE to be reached using an L3
> address instead of an L2 address."
>
> "MIH PoA is the closest network counterpart of the UE for MIH exchanges."
>
> Thanks,
>
> Andrea
>
> > Phillip Barber wrote:
> >
> > You might try differentiating:
> >
> > * L2 as Point-of-Attachment (PoA), since it is the MAC peer-to-peer
> > connection between a subcriber device and a BS, AP, etc...connecting the
> > subscriber device to the network. Should be characterized as the first
> > point of attachment of the subcriber device to the network. The subcriber
> > device may be any device or system requiring connection to the network;
> > * and L3 as Point-of-Interface (PoI), since it is the interface point on
> > the BS, AP, etc...servicing the logical transport port of the subscriber
> > device.
> >
> >
> > Thanks,
> > Phillip Barber
> > Huawei
> >
> > ----- Original Message -----
> > From: <stefano.faccin@NOKIA.COM>
> > To: <pfeder@LUCENT.COM>; <STDS-802-21@listserv.ieee.org>
> > Sent: Friday, September 30, 2005 8:14 AM
> > Subject: RE: [802.21] [DNA] Prefix information for link identification in DNA
> >
> > > Peretz, I thought we had decided to get away from the thinking that MIH is
> > "below" L3 and "above" L2, since this is anyway incorrect. I still think we
> > hve both L2 PoAs and L3 PoAs, depending on the specific scenarios. Limiting
> > the PoA to be at L2 is ... well, too limiting. For 802.21 @ L3, the PoA is of
> > course @ L3 snce the very first location where the <MIHF in the UE can send
> > e.g. an IS request is @ or beyond the subnet where the UE gets its own IP
> > address.
> > > Stefano
> > >
> > > ________________________________
> > >
> > > From: ext Peretz Feder [mailto:pfeder@LUCENT.COM]
> > > Sent: Fri 9/30/2005 7:42 AM
> > > To: STDS-802-21@listserv.ieee.org
> > > Subject: Re: [802.21] [DNA] Prefix information for link identification in
> > DNA
> > >
> > >
> > > Within the discussion of MIH services, which is below layer 3, I would
> > assume that MIH centric PoA should be below layer 3, no?
> > > This is the 802.21 reflector, correct?
> > >
> > > Once PoA L2 (or L2.5) is established between MIH on the UE and MIH in the
> > 802.21 compliant PoA and MIH services provided thereof, we can discuss higher
> > layers PoAs in relation to other relevant MIH elements that require L3
> > transport services.
> > >
> > > Peretz Feder
> > >
> > > On 9/30/2005 4:09 AM, Mike Moreton wrote:
> > >
> > >
> > > To extend (I think!) Stefano's point, before determining what the PoA is,
> > you have first to be very clear about what you're attaching. Just saying "the
> > terminal" makes no sense, because different layers in the terminal's protocol
> > stack attach to different places in the network.
> > >
> > > For example, the PHY layer attaches to the AP, but the TCP layer attaches to
> > the destination host.
> > >
> > > Mike.
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Stefano M. Faccin [mailto:stefano.faccin@NOKIA.COM]
> > > Sent: Friday, September 30, 2005 1:08 AM
> > > To: STDS-802-21@listserv.ieee.org
> > > Subject: Re: [802.21] [DNA] Prefix information for link
> > > identification in DNA
> > >
> > >
> > > Yoshihiro,
> > > I'm not sure why should restrict the term PoA to have only a
> > > L2 meaning as you suggest below. I think we should
> > > distinguish clearly between L2 PoA and L3 PoA. For me, the L3
> > > PoA is where the terminal gets IP conenctivity. E.g. for GPRS
> > > the L3 PoA is the IP link on which the GGSN is located. In
> > > L2, PoA is the point where the access-specific L2 connection
> > > terminates (e.g. an AP in 802.11).
> > > Stefano
> > >
> > >
> > >
> > >
> > >