MPLS in Mobile Backhaul Networks Framework and Requirements ...
MPLS in Mobile Backhaul Networks Framework and Requirements ...
MPLS in Mobile Backhaul Networks Framework and Requirements ...
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<strong>MPLS</strong> <strong>in</strong> <strong>Mobile</strong> <strong>Backhaul</strong> <strong>Networks</strong> <strong>Framework</strong> <strong>and</strong> <strong>Requirements</strong> Technical Specification IP/<strong>MPLS</strong> Forum 20.0.0<br />
___________________________________________________________________________________<br />
TNL TNL<br />
TNL PW<br />
TNL<br />
TNL<br />
TNL PW<br />
TNL PW<br />
LSP<br />
LSP<br />
LSP<br />
LSP<br />
LSP<br />
LSP<br />
LSP<br />
L1 L1<br />
L1<br />
L1<br />
BS<br />
TDM<br />
ATM<br />
Ethernet<br />
PE<br />
CSG<br />
L2<br />
L1<br />
Access<br />
network<br />
L2<br />
L1<br />
L2<br />
L1<br />
Access<br />
Node<br />
L1<br />
<strong>MPLS</strong> network<br />
L2 L2<br />
P P<br />
<strong>MPLS</strong><br />
Node<br />
L1<br />
Aggregation<br />
network<br />
TNL PW<br />
MASG<br />
Figure 7: Protocol stacks used for TNL transport <strong>in</strong> <strong>MPLS</strong> use case (d)<br />
TDM<br />
ATM<br />
Ethernet<br />
In Figure 7, <strong>MPLS</strong> extends across the aggregation <strong>and</strong> access networks. The Access Node is <strong>MPLS</strong>aware,<br />
act<strong>in</strong>g as a P router. The PSN tunnel is switched at the P routers.<br />
October 2008 Page 22<br />
L2<br />
L1<br />
PE<br />
RC
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