Re: [802.21] [DNA] Prefix information for link identification in DNA
On 9/30/2005 9:14 AM, stefano.faccin@nokia.com wrote:
>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.
>
This is not what Figure 1 shows in P802-21-D00-02.
>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
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>________________________________
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>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:
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> 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.
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> Mike.
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> -----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
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