Recommended Beacon Interval for 2.4GHz vs 5GHz dual band networks with single SSID
jward01 at gmail.com
Mon Jan 5 18:22:54 EST 2015
I agree, that within the context of a multi-AP network, controlling
association with just the beacon interval does leave much of the picture
out of the equation, especially when a STA is roaming. As far as coverage
differences between 2.4GHz and 5GHz spectrum, this is more of a network
However, the application in which we are using hostAPd is a type of mobile
appliance that will never have more than a single integrated AP (well,
technically two APs since it is dual-band); as such, roaming is not a
Thanks for the feedback.
Jeremy D. Ward, CWNE
On Jan 5, 2015 4:44 PM, "Arend van Spriel" <arend at broadcom.com> wrote:
> On 01/05/15 21:31, Jeremy Ward wrote:
>> Looking for a reccomendation as to what should be specified for a beacon
>> interval on each wireless interface when using two cards under hostAPd,
>> one operating at 2.4GHz the other at 5GHz, with the same SSID on each.
>> The goal is to increase the likelihood that an STA will see the 5GHz
>> beacon before the 2.4GHz beacon, and thus associate with the 5GHz AP and
>> not the 2.4GHz AP.
>> A number of enterprise-class dual-band APs use exactly this tactic to
>> "entice" a dual-band STA to associate with the 5GHz radio, mostly
>> because out in the wild, 5GHz is less encumbered than 2.4GHz and has
>> close to 10x the amount of available spectrum (regulatory domain
>> dependent, of course)
> This statement may be true, but you overlook a number of constraints. It
> is true that 5G is less crowded and will suffer less from interference.
> Howerver, when it comes to range "out in the wild" you are better of with
> 2.4G. If you STA is in good range and stationary 5G is probably the better
> choice. So in my opinion (not a CWNE) these kind of settings are not very
> useful unless you have some kind of algorithm that takes signal strength
> and rate info into account dynamically, which is what roaming algorithms
> would do.
> My thoughts were the following:
>> 2.4GHz Beacon Interval: 200
>> 5GHz Beacon Interval: 50
>> Also, if this is not the right forum in which to post such a question,
>> please let me know.
>> Thanks for your feedback and assistance,
>> Jeremy D. Ward, CWNE
>> (954) 661-4965
>> HostAP mailing list
>> HostAP at lists.shmoo.com
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