RPR Interconnection Topologies

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RPR Interconnection Topologies

• zhaisuping_at_huawei.com
• yanw_at_huawei.com
• IEEE802.17 WG
• Orlando, Florida USA
• March 1116, 2007

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Two Basic RPR Interconnection Topologies
Topology A
Topology B
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The Comparison of Two Topologies
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The Comparison of Two Topologies Cont.
Tentative Conclusion (need further discussion)
When the requirement of network deployment
flexibility outweighs the cost, then the Topology
B is used, or else the Topology A is recommended
in the RPR interconnection rings network.
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The following slides will illustrate the
different application scenarios for the
interconnected RPR rings. The following figures
take the Topology A as example, but the same
topologies also apply to Topology B as well.
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Application Scenario 1

• There are several subtending rings across one
  ring.
• Each pair of interconnected stations (A, B
  and C,D) are independent
• and belong to different protection groups.

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Application Scenario 2

• There are several subtending rings across one
  ring, and these subtending rings share a common
  station.
• Each pair of interconnected stations (A, B
  and B, C) are independent and belong to
  different protection groups.

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Application Scenario 3

• There are several subtending rings across one
  ring, and these subtending rings share the same
  interconnection stations.
• For the usual deployment, subtending access
  rings are not communicated each other, they only
  need to communicate with the aggregation rings.
• But if the subtending access rings need to
  communicate each other, they still can at the
  cost of some implementation complexity.

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Application Scenario 4

• We dont want support this disordered
  topologies. Do we want?

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Thank you