adventures in volte - the status of volte deployments in south-africa and bulgaria
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Adventures in VoLTE:
The open-source VoLTE deployments in Bulgaria and South Africa
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A little history...
2010: Merge OpenIMSCore into Kamailio
2011: Smile Telecoms joins the development
2013: Early deployments in fixed networks
2015: First VoLTE networks! :-)
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Who's involved?
Max Telecom (Bulgaria)The first LTE Operator in Bulgaria!
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Smilecoms (South Africa)LTE Operator in South Africa, Nigeria, Uganda and Tanzania
ng-voice (Germany)Member of the Kamailio-Management-Team
And of course the open-source community!!!
Launch:Q1/2015
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What do we want to achieve?
VoLTE Telephony – for real VoLTE Handsets a VoLTE based SMS-Service (3GPP SMS) an OTT-Voice-Service
– for non VoLTE, 4G-Handsets an OTT-SMS-Service (SIP-Message) Wifi Offloading
should run virtualized, where possible (NFV)
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What are we not aiming at (yet)?
JOYN
Single Radio-Voice Call Continuity (SRVCC)
WebRTC
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Kamailio – as the IMS-Core SEMS (or other SBC) for Topology Hiding
and Transcoding Kamailio and/or Freeswitch as the MMTel
HSS: Any HSS will do (Standard Cx/Dx-Interface) PCRF: Any PCRF will do (Standard Rx-Interface) Charging: Any OCS will do (Standard Ro-Interface)
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Our Architecture: Voice
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Our Architecture: SMS
Option 1: Kamailio as the SMS-AS: Kamailio – as a translator between 3GPP/SMS
(VoLTE) and plain SIP-Message (OTT) as a gateway towards e.g.
Kannel (www.kannel.org)Mobicents SMSC (code.google.com/p/smscgateway)
Option 2: Add 3GPP-SMS to Mobicents
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Our Architecture
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Alternatives? (1)
OpenVoLTE – Yate/YateBTS
has an SRVCC implementation- no real IMS – just a „lightweight IMS emulation“- no Rx-Interface – we cannot connect to a PCRF- no Ro-Interface for online-charging- not really open-source, only parts
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Alternatives? (2)
Project Clearwater (Metaswitch)
- is no real IMS – various interfaces are using HTTPinstead of Diameter
- no Rx-Interface – we cannot connect to a PCRF- no Ro-Interface for online-charging
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Current challenges
SMS-Implementation - Voice is easy ;-) SMS-OTT-Interworking??
Patent issues for AMR-NB – sorted out
Test, Test, Test!
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Thank you!Contact: www.ng-voice.com - [email protected]