[AFRINIC-rpd] Academic IPv4 Allocation Policy Second Draft (AFPUB-2013-GEN-001-DRAFT-02)

[Owen DeLong]

On Jan 28, 2013, at 13:52 , Seun Ojedeji <seun.ojedeji at gmail.com> wrote:

> Hello Owen,
> 
> On Mon, Jan 28, 2013 at 10:01 PM, Owen DeLong <owen at delong.com> wrote:
> Actually not really for all APs...i have used APs that run on 2.4 and handles way over 400 concurrent  
>  
> I bet that the users weren't doing very much per user, then.
> 
> Maybe not as much as compared to what is available at your region due to bandwidth restrictions :-).
>  

Perhaps, though I will say I have seen the wifi network get saturated at AfriNIC conferences.

>> and anything north of about 200 is virtually unusable at 5Ghz.
>> 
>> Who runs 200 users on 5ghz by the way ;)
> 
> I run lots of users on 5Ghz. Almost all Apple products (iPhone being the notable exception) have
> 5Ghz capability.
> 
> Considering the limited range, fewer standards, and limited supported access devices all which increases cost of implementation. Most in my region don't use 5ghz for access devices, hence it was kinda strange to me ;)
> 

I'm not sure what you mean. 2.4Ghz has 802.11b/g/n and anyone using current technology is using n, nobody still uses b, do they?
5Ghz has 802.11a/n and while hardly anyone uses 802.11a, 802.11n is quite popular and vastly superior to 2.4Ghz 802.11n.

In terms of range, the shorter range is an advantage when dealing with dense populations. In areas of low population density,
5Ghz actually travels as well and in some cases better than 2.4Ghz. For example, 5Ghz will penetrate stucco walls better than
2.4Ghz because the chicken wire used to support the stucco is often smaller than 1/4 wavelength at 23cm, but not at 12cm.

5Ghz is more subject to attenuation from trees and people, but 2.4Ghz is more subject to attenuation from construction.

So, depending on your circumstances, you can actually get better distance performance from 5Ghz. Further, 5Ghz has a
much tighter fresnel zone with directional antennas, so you can gain much better advantages on line-of-sight point to point
links.

Most modern access points of any quality in my region these days are dual-band. More and more, what is the term
we're using now... photabtops are coming with dual-band radios as well.

At least in the US, there is virtually no difference in cost between 2.4, 5, or dual-band any more.

Owen

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