[Ndn-interest] Data comes from another face?

[Junxiao Shi]

Hi Sabet

Yes, in my example the WiFi access point is turned into a wireless router,
which is a L3 device.
In reality, most WiFi access points can be upgraded to work on L3 with
cross-compiled NDN stack for OpenWRT
<http://redmine.named-data.net/projects/ndn-embedded/wiki/Cross-compiling_NDN_projects_for_home_routers>
.

When the access point (or wireless router) treats a link as point-to-point,
the destination address would be a unicast address.
In 802.11 WiFi, the access point can send to unicast address at a faster
rate than a multicast/broadcast address.
See draft-vyncke-6man-mcast-not-efficient-01
<https://tools.ietf.org/html/draft-vyncke-6man-mcast-not-efficient-01>
section 3.

Yours, Junxiao

On Mon, Jun 8, 2015 at 8:45 AM, Muhammad Hosain Abdollahi Sabet <
M.AbdollahiSabet at mail.sbu.ac.ir> wrote:

>  Junxiao,
>
> Thank you for responding.
>
> >​Infrastructure WiFi is different: at MAC layer, all communications go
> through the AP (access point).
> We could take advantage of this property, and install an NDN stack on the
> AP that aggregates Interests and caches Data.
>
> ​You mean we turn a L2 device (access point) into a wireless router?
>
>  ​
> ​>​the AP treats the WiFi link as both a multi-access link where packets
> can be broadcast to all wireless clients, and one point-to-point link to
> each wireless link.
>
> Does that make any difference? An ap treat a link as a multiple-access or
> a point-to-point link. I mean in both cases, the ap does the same
> thing(transmit one copy of a packet). The only difference would be in L2
> addressing​, right? Of course there could be difference if using
> omnidirectional or unidirectional antennas, which could be a big deal
> facing mobile nodes. But that's out of computer networking scope.
>
> Thanks,
> Sabet
>
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