VoIP over MPLS & Voice Services over MPLS. Jim McEachern jmce@nortelnetworks.com
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1 VoIP over & Voice Services over Jim McEachern
2 Voice Services over Standards IETF RFC 3032 () draft-ietf-pwe3-requirements-08.txt draft-ietf-pwe3-arch-07.txt and Frame Relay Alliance Forum 1.0 / Frame Relay Alliance ITU-T Y.1411 (2003) Y.1414 (2004) 2
3 ITU-T: Voice Services over Objectives Align with other standards for interworking IETF PWE3 ITU-T Interworking (Y.1411) and Frame Relay Alliance Efficient interworking with VoIP Efficient interworking with deployed ATM networks Efficient transport Family of Protocols Specified 3
4 Interworking Functional Grouping transport label (4 octets) Interworking label (4 octets)* Common Interworking Indicators (4 octets)* Payload Common Format for Interworking 4
5 The Pseudo Wire IETF Pseudo Wire Pseudo Wire Stack Payload Encapsulation PW Demultiplexer PSN Convergence PSN Data-link Physical 5 PSN Convergence Maps the Payload in a format acceptable by the Packet Switched Often Referred to as a Tunnel May be Null PW Demux Allows Multiple PW over a single PSN Tunnel Encapsulation Carries extra information that is not within the payload itself. May be Null Payload This is a packet typically at the or Data link layer Examples Ethernet, Frame Relay, ATM, SONET Payload, IP
6 VS- Interworking Rec Y.1414 specifies three solutions Voice over IP over alignment with VoIP standard VoIP transported over Voice over using AAL type 2 SSCS for narrowband services simplified interworking with ATM ATM SSCS PDUs transported over Voice over using Forum IA 1.0 transport efficiency also based on ATM SSCS PDU 6
7 Interworking Native Service Foo Foo Foo Encapsulation of any service in 7
8 VS - Reference Architecture End System 1 Voice services IWF VS IWF VS Voice services End System 2 Voice services network Voice services = Label Switched Router LSP = Label Switched Path VS = Voice Services 8
9 VS - Reference Architecture End System 1 Voice services IWF VS IWF PE VS CE Voice services End System 2 Voice services network Voice services = Label Switched Router LSP = Label Switched Path VS = Voice Services 9
10 VS- Deployment: Enterprise Site A core network Site B Corporate HQ 10
11 VS- Deployment: Carrier ATM ATM ATM Enterprise Existing Carrier ATM network 11
12 VS- Deployment: Carrier core network ATM ATM ATM Enterprise transitions to 12
13 VS- Deployment: Carrier core network ATM ATM Enterprise and to VoIP 13
14 VS- Deployment: VoIP trunk size CO consolidation Tandem Fiber Optics Switch unbundling (H.248) Voice over Packet Voice over IP SIP deployment time SIP is making the concept of large trunk groups irrelevant Voice over IP over 14
15 VS- Deployment: VoIP core network Smaller access GWs brings VoIP closer to the customer and aligns well with the Voice over IP over standard. 15
16 VS- Deployment: VoIP core network SIP SIP SIP SIP SIP deployment of SIP phones will accelerate trend 16 SIP
17 Conclusions Voice Services over network interworking standards complete Consistency between standards organizations Family of protocols to satisfy requirements interworking with deployed ATM enterprise networks alignment with VoIP & SIP VoIP over will become increasingly important 17
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