3. Network Architecture
The MAAN network is envisaged to be deployed in the BAs of the Telecom Circles and also connecting
to the existing Core MPLS network. The network is planned to be deployed as a collection of sparsely
connected rings.
3.1.High level MAAN Network Topology for a BA.
MAAN network is built around Business Areas (BA) within the telecom circles. The traffic from the
access routers are aggregated and delivered at BA for most of the services. The access routers
connect to the next level router at the Exchange in ring or linear topology. The exchange routers
aggregate traffic from the access routers and connect to the next level router at OA/SDCA which are
in turn connected to the BA in rings.
Figure 1: MAAN Network Topology for a BA
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Figure 2: MAAN backhaul capacity
3.2.MAAN Network Topology – with hand-off device connections
The access routers connect to various devices like 2G/3G BTS, 4G eNodeB, FTTH OLT and Enterprise
routers etc. Service handoffs for various applications are as shown below.
Figure 1: MAAN Topology with hand-off devices with BNG in same BA
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Figure 4: MAAN Topology with hand-off devices with BNG in different BA
3.3.MAAN Network Connecting to existing CPAN network
3.3.1. CPAN Network as transport for connecting two MAAN networks:
CPAN network transparently connects two MAAN routers. All MAAN traffic is seamlessly
transported to another MAAN router via a CPAN circuit. CPAN network here acts as a transport
and transparently carries all the service traffic from MAAN.
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Figure 4(a): MAAN network connectivity to existing CPAN network
3.3.2. MAAN Network as transport for CPAN:
CPAN network will be terminated on the MAAN network. MAAN network will seamlessly
transport all the CPAN traffic over an L2VPN service.
Figure 4(b): MAAN network connectivity to existing CPAN network
4. MPLS Network design - AS
Each Telecom circle is split into multiple BA (business Area) which are connected to Core MPLS. An AS is
planned for one BA.
The AS will be private AS assigned by BSNL.
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