Hi Jose,

Framed IP or some king of hashing over IP/identitiy/APN... is used from PCRF for session binding. If I understand question right the short answer is that reservation from PCRF is made by Media-Component-Description not by framed IP address. In your architecture if Kamailio instance that serves Rx do not have real UE IP address (and real SDP media addresses) it cannot send proper info to PCRF. You should put Kamailio in front of SBC...

BR,
Ivo

On 04/28/2016 12:28 AM, José Seabra wrote:

Hi,

Updating my last email, I noticed that the AVP framed_ip_address is also containing the IP address of SDP C field, so in my case that I have a SBC in front of my Kamailio doing NAT, the SDP address will be the IP of the SBC, in order that PCRF will try reserve bandwidth in the SBC.

What we can do in these cases?

Thank you for your support

BR

2016-04-27 10:52 GMT+01:00 José Seabra <joseseabra4@gmail.com>:

Hi Jason,

What could be the impact of using both modules (usrloc and  ims_usrloc_pcscf)?

One of the impacts that I can see is the Shared memory, it will consume more shared memory because  will save the AOR twice in memory, one in usrloc and the other in ims_usrloc_pcscf, is that right?

Another Doubt that I have:

At this moment I'm only using  the function rx_aar, (I'm not using ims_qos with register sip messages), and when kamailio sends an AAR to PCRF, the AVP "Flow-Description" contains the IP address of received host, that is a kamailio server acting as loadbalancer, not the Terminal IP address.

So I'm obliged to use RX  on registrar messages in order to have the AOR of the SIP Terminal on the AVP "Flow-Description"? Or can I manipulate it in an easy way?

Anyway I'm facing an issue when PCRF is sending an Abort-Session Request after the call is established, Kamailio stops working with the following Log messages:


36(21757) DEBUG: cdp [receiver.c:1083]: receive_message(): receive_message(): [alb-pcrf.rx.example.com] Recv msg 274
36(21757) DEBUG: cdp [peerstatemachine.c:92]: sm_process(): sm_process(): Peer alb-pcrf.rx.example.com     State I_Open     Event I_Rcv_Message
36(21757) DEBUG: cdp [session.c:305]: cdp_get_session(): called get session with id proxy1.sw.example.com;2463925226;1 and hash 39
36(21757) DEBUG: cdp [session.c:308]: cdp_get_session(): looking for |proxy1.sw.example.com;2463925226;1| in |proxy1.sw.example.com;2463925226;1|
36(21757) DEBUG: ims_qos [mod.c:301]: callback_for_cdp_session(): callback_for_cdp session(): called with event 5 and session id [proxy1.sw.example.com;2463925226;1]
36(21757) DEBUG: ims_qos [cdpeventprocessor.c:113]: new_cdp_cb_event(): Creating new event for rx session [proxy1.sw.example.com;2463925226;1]
36(21757) INFO: cdp [authstatemachine.c:271]: auth_client_statefull_sm_process(): after callback of event 5
36(21757) INFO: cdp [authstatemachine.c:733]: Send_ASA(): Send_ASA():  sending ASA
36(21757) INFO: cdp [authstatemachine.c:758]: Send_ASA(): sending ASA to peer alb-pcrf
36(21757) DEBUG: cdp [diameter_msg.c:83]: AAABuildMsgBuffer(): AAABuildMsgBuffer(): len=172
39(21770) DEBUG: ims_qos [cdpeventprocessor.c:209]: cdp_cb_event_process(): processing event [5]
39(21770) DEBUG: ims_qos [cdpeventprocessor.c:221]: cdp_cb_event_process(): Received notification of ASR from transport plane or CDP timeout for CDP session with Rx session ID: [proxy1.sw.example.com;2463925226;1] and associated contact [] and domain []
39(21770) DEBUG: ims_qos [cdpeventprocessor.c:228]: cdp_cb_event_process(): This is a media bearer session session39(21770) DEBUG: ims_qos [cdpeventprocessor.c:316]: free_cdp_cb_event(): Freeing cdpb CB event structure
39(21770) DEBUG: ims_qos [cdpeventprocessor.c:318]: free_cdp_cb_event(): about to free string from cdp CB event [proxy1.sw.example.com;2463925226;1]
 0(21693) ALERT: <core> [main.c:739]: handle_sigs(): child process 21757 exited by a signal 11
 0(21693) ALERT: <core> [main.c:742]: handle_sigs(): core was not generated
 0(21693) INFO: <core> [main.c:754]: handle_sigs(): terminating due to SIGCHLD
 0(21693) DEBUG: <core> [main.c:756]: handle_sigs(): terminating due to SIGCHLD
69(21816) INFO: <core> [main.c:809]: sig_usr(): signal 15 received
.
.
.

Thank you

Best Regards

José Seabra

2016-04-25 13:27 GMT+01:00 Jason Penton <jason.penton@smilecoms.com>:

Hi José,

Unfortunately you have to use the ims_usrloc_pcscf as there are extra extra data fields that are required in the case of IMS registrations. Perhaps what you can do is run with both usrloc backends. I know that we made the restriction that you could only use one but I as soon as I get a chance I will see if it's possible for ims modules to bind specifically to the ims_usrloc_* module as well as allow you to run "other" code that bind to other usrloc backends.

Cheers

Jason

On Sun, Apr 24, 2016 at 11:30 PM, José Seabra <joseseabra4@gmail.com> wrote:

Hi all,

Once again, thank you all for the Help.

I have one last question, can I use the function Rx_AAR_Register without save the  usr location information on ims_usrloc_pcscf? that is because  I'm already using the usrloc module with dmq_usrloc.

I know that ims_usrloc_pcscf is a dependency of ims_qos, but the doubt here is if I don't use the ims_registrar_pcscf, the usrloc_pcscf won't be used to store usr location? And the ims_qos will works correctly?

BR

José Seabra

2016-04-22 23:46 GMT+01:00 Ivailo Dobrev <ivailod@telera.eu>:

Hi Jason,

It is always better when code "guru" shares his opinion :)

Cheers gents !

On 04/23/2016 01:35 AM, Jason Penton wrote:

Hi gents,

we do not support the preliminary service information. So for now you can only call Rx_AAR when you have SDP in the replies. So for VoLTE (preconditions), for example you can call on 183 SP whilst using plain SIP you will have to call on the first reply you get that has SDP (either 183SP or 200OK).

HTH

Cheers

Jason 

On Fri, Apr 22, 2016 at 11:11 PM, Ivailo Dobrev <ivailod@telera.eu> wrote:

Yes you send both direction media information to the PCRF but when reply is received in precondition state.

On 04/23/2016 12:03 AM, José Seabra wrote:

Hello Ivailo and Franz,

Thank you for your clarifications.

Well sending an AAR when receive a reply makes all sense, but ims_qos must send the SDP information from the Initial Invite and also from 183 ringing or 200Ok,  Am I correct?

Because PCRF needs to know the session parameters from Initial Initial INVITE and the reply to it.

The PCRF is a proprietary solution. 

Thank you

BR

José Seabra

2016-04-22 21:54 GMT+01:00 Ivailo Dobrev <ivailod@telera.eu>:

Hi Franz,

There no real OS PCRF. Yota/Telexir use to had some free VM image that is OK for test. You can search about FreePCRF. It is a little tricky to configure it but ... I made for my tests a really dummy one based on FreeDIAMETER. Generally speaking PCRF is the "brain" of the network and you should understand and design things well there. I have experience also w/ commercial PCRFs and there is no real answer yes this is a right way of making something.

Cheers,

Ivo

On 04/22/2016 11:09 PM, Franz Edler wrote:

Hi José,

 

in principle it is possible to send an AAR after receiving the request. In this case the Service-Info-Status AVP is set to PRELIMINARY SERVICE INFORMATION.

More efficient is it to wait until SDP answer is received and then the Service-Info-Status AVP is set to FINAL_SERVICE_INFORMATION.

 

I don’t know if both methods are covered in ims_qos module.

 

BTW: which PCRF are you using? Is there some open source PCRF available?

 

BR

Franz

 

From: sr-users [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of José Seabra
Sent: Friday, April 22, 2016 3:58 PM
To: Kamailio (SER) - Users Mailing List <sr-users@lists.sip-router.org>
Subject: [SR-Users] Kamailio IMS_QOS

 

Hello There,

I'm trying using the ims_qos module with PCRF for QOS, but I'm facing some issues.

When kamailio receives an initial invite (originator), it will execute the function - "Rx_AAR("ORIG_SESSION_AAR","orig","",-1)", but the PCRF is not contacted and i see the following messages:

 5(12153) DEBUG: <script>: Diameter: Orig authorizing media via Rx
 5(12153) DEBUG: ims_qos [mod.c:609]: w_rx_aar(): Looking for route block [ORIG_SESSION_AAR]
 5(12153) DEBUG: ims_qos [mod.c:621]: w_rx_aar(): Rx AAR called
 5(12153) DEBUG: ims_qos [mod.c:1345]: create_return_code(): Creating return code of [-2] for aar_return_code
 5(12153) DEBUG: ims_qos [mod.c:1354]: create_return_code(): created AVP successfully : [aar_return_code]
 5(12153) DEBUG: ims_qos [mod.c:627]: w_rx_aar(): Can't do AAR for call session in request.

Why kamailio says  that I  Can't do AAR for call session in request?  I have looked into source code and I found that the condition that is blocking the communication with PCRF is:





//We don't ever do AAR on request for calling scenario...
    if (msg->first_line.type != SIP_REPLY) {
        LM_DBG("Can't do AAR for call session in request\n");
        return result;
    }

Anyone can help me understand why it is happening? why it can't proceed if isn't a reply?

Thank you for your support

BR

--

José Seabra

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sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

--

Jason Penton

Senior Manager: Applications and Services

Smile Communications Pty (Ltd)

Voice: Mobile: +234 (0) 702 000 000 7 +27 (0) 83 283 7000 Skype: jason.barry.penton

jason.penton@smilecoms.com

www.smilecoms.com

This email is subject to the disclaimer of Smile Communications at http://www.smilecoms.com/home/email-disclaimer/

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Cumprimentos

José Seabra

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José Seabra

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