[OpenSIPS-Users] QoS Module

[Bogdan-Andrei Iancu]

Hi Ovidiu,

Ovidiu Sas wrote:
> Hello Bogdan,
>
> The qos module was written with this purpose in mind.
>   
I just wanted to check with you this :)
> The qos context of each dialog can be inspected via the mi commands.
> Via a similar mechanism as mi, variables from the qos context can be
> exposed to the dialog module.
> For the specific scenario that you have in mind, the required
> bandwidth for up/down-stream can be consolidated per dialog profiles
> and used in routing decisions.
>   
more or less this is what I have  in mind - in LB module, for each peer 
you declare as a new resource the maximum bw and the LB module will also 
take into into consideration when balancing not to overload the server 
(as load) but not to overload the link too.
> Some clients provide the required bw inside sdp, but for some others
> it will need to be computed based on advertised codecs.  We need to
> keep in mind that the required bw is a guess, since from a signaling
> point of view, we don't know which codec will be used from a list of
> multiple codec offer.
>   
That is an issue as (as you said) you cannot say (from signalling level) 
what codec will be used -but maybe considering  the worst one will be a 
safe approach.
> The qos module is keeping track of negotiated sdp sessions via
> INVITE/200ok, 200ok/ACK.  Support for UPDATE is present but not
> implemented.
> Support for early media is available.
>   
Cool :)

Thanks and regards,
Bogdan
>
> Regards,
> Ovidiu Sas
>
> On Fri, May 8, 2009 at 3:18 AM, Bogdan-Andrei Iancu
> <bogdan at voice-system.ro> wrote:
>   
>> Hi Ovidiu,
>>
>> From the QoS module perspective, do you think I will be able to reuse it for
>> the load balancer module to get bandwidth info to be used in the LB process?
>> What I have in mind is to expand the LB module to work not only with load
>> like number of channels, but to work with load and used bandwidth per
>> peer...what do you think?
>>
>> Regards,
>> Bogdan
>>
>> Ovidiu Sas wrote:
>>     
>>> Hello k1028,
>>>
>>> For now, the qos modules just keeps track of the SDP sessions
>>> established inside a dialog.
>>> You can inspect the established SDP sessions via the mi interface.
>>> There are no modules using the qos API.  You will need to write your
>>> own module and do whatever you want to do on that module.
>>> If something is unclear on the doc file, let me know and I will improve
>>> it.
>>>
>>>
>>> Regards,
>>> Ovidiu Sas
>>>
>>> On Thu, May 7, 2009 at 3:33 PM, k1028 <mrprotocols at gmail.com> wrote:
>>>
>>>       
>>>> I tried to google around and look through all the documentation but I am
>>>> still unclear how the QoS module work to test it on my staging network.
>>>> According to the module documenation it keep track of the SDP session and
>>>> provide API to be use by other module. Which other module use the QoS
>>>> module?
>>>> --
>>>> View this message in context:
>>>> http://n2.nabble.com/QoS-Module-tp2835356p2835356.html
>>>> Sent from the OpenSIPS - Users mailing list archive at Nabble.com.
>>>>
>>>>
>>>> _______________________________________________
>>>> Users mailing list
>>>> Users at lists.opensips.org
>>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>>
>>>>
>>>>         
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.opensips.org
>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>
>>>
>>>       
>>     
>
>