802.11ac lower extension channel

[Sebastian Gottschall]

you're right. my fault


Am 16.05.2016 um 09:31 schrieb Michal Kazior:
> On 16 May 2016 at 09:08, Sebastian Gottschall <s.gottschall at dd-wrt.com> wrote:
>> Am 16.05.2016 um 07:35 schrieb Michal Kazior:
>>
>> On 14 May 2016 at 06:37, Sebastian Gottschall <s.gottschall at dd-wrt.com>
>> wrote:
>>
>> Hello
>>
>> a long time ago i discovered that ath10k doesnt seem to support lower
>> extension channel configuration which raises also a bug report for DD-WRT in
>> my case.
>> when will this issue be fixed?
>> if i set channel 100 and extension channel to 106 (and ht40+) in hostapd,
>> all is working
>>
>> You probably mean 100 and 104. There's no control channel 106.
>>
>> 106 could be used as center channel/frequency for vht80 across 100 and 112.
>>
>> for your own reference. this one here is working
>>
>> vht_oper_chwidth=1
>> vht_oper_centr_freq_seg0_idx=106
>> channel=100
>>
>> you're right i swapped center and control
>>
>> according to the documentation of ath10k. the distance of center and
>> control. is "6" for vht80. and not 4
> It's an oversimplification and works for channels that are first in a
> segment (e.g. 36).
>
>
>> the problem now is, it wont work for lower
>>
>> so the following hostapd snipped wont work
>> vht_oper_chwidth=1
>> vht_oper_centr_freq_seg0_idx=102
>> channel=108
> This is incorrect configuration. You can't use channel 102 as center
> channel for vht80. See the channel allocation map I've linked in my
> previous email.
>
> Valid VHT80 center channels (seg0_idx) are: 42, 58, 106, 122, 138, 155.
>
> If you want to use channel 108 as control channel you need to use
> seg0_idx=106 with HT40+.
> You should be able to use channel=104 (and seg0_idx=106) with HT40- as well.
>
>
> Michał
>


-- 
Mit freundlichen Grüssen / Regards

Sebastian Gottschall / CTO

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