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Applicability of OSPF Topology-Transparent Zone

Applicability of OSPF Topology-Transparent Zone. Gregory Cauchie (greg.cauchie@gmail.com) Ning So (ning.so@tatacommunications.com ) Vic Liu (liuzhiheng@chinamobile.com) Lei Liu (liulei.kddi@gmail.com ) Huaimo Chen (huaimo.chen@huawei.com) Renwei Li (renwei.li@huawei.com). Contents.

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Applicability of OSPF Topology-Transparent Zone

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  1. Applicability of OSPF Topology-Transparent Zone Gregory Cauchie (greg.cauchie@gmail.com) Ning So (ning.so@tatacommunications.com) Vic Liu (liuzhiheng@chinamobile.com) Lei Liu (liulei.kddi@gmail.com) Huaimo Chen (huaimo.chen@huawei.com) Renwei Li (renwei.li@huawei.com)

  2. Contents • Introduction • Applications • TTZ in One Area Network • TTZ in Multi-Area Network • TTZ for IP RAN (Updated) • Next Step Page 2

  3. Introduction T3 T3 T2 T1 T1 T6 T5 T7 T9 T4 T4 T8 T10 T10 TTZ Area 0 TTZ1 TTZ2 TTZ3 TTZ4 R6 R2 R8 R3 R10 TTZ is a group of routers • virtualized asTTZ edge routers fully connected • routers outside TTZ • are NOT aware of, just see the edge routers connected, TTZ topology is hidden • see the topology beyond TTZ • Routers inside TTZ see the network topology beyond TTZ boundary Smooth migration to TTZ • a part of area can be smoothly migrated to a TTZ without any network architecture changes

  4. Problem Space – IP RAN • The IP RAN provides connectivity for IP-based mobile broadband (MBB) from LTE and 4G base stations. • Ratio of MBB subscribers to total mobile subscribers is expected to grow from 15% in 2011 to nearly 40% in 2016 • MBB market is forecast to grow to $1 trillion by 2016, with the bulk of the growth coming from MBB services. • At the end of 2012 China Mobile 25(1) had deployed more than 500,000 nodes to support MBB services. • The size of the IP RAN network must seamlessly scale to hundreds of thousands of nodes. • Frequently splitting area as IP RAN network grows rapidly has issues 1. PTN Market Research 2013 Frost & Sullivan

  5. Issues and Solution Splitting an area into more areas: • Significant network architecture changes, lots of time for network planning, configuration and migration • Service interruptions, thus reduce the availability of the network • Complex for end to end service creation crossing areas Solution: TTZ resolves these issues through transferring parts of an area to TTZs: • No significant network architecture change, migration to TTZ is smooth and can be automatic • No (or minimum) service interruption • Easy for end to end service creation crossing TTZs (same as before)

  6. Next Step • Welcome comments

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