S-38.149 Postgraduate Course in Teletraffic Theory

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S-38.149 Postgraduate Course in Teletraffic Theory

• Multiwavelength Optical Networks
• Chapter 8 Survivability, Protection and
  Restoration
• Harald Kaaja, S31774H
• (email Harald.Kaaja_at_Nokia.com)
• 27.11.2000

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Homeworks (27.11.00)

• 1) (1) A network is represented by a seven-vertex
  graph with the following edges (1,3), (1,4),
  (1,5), (1,6), (2,4), (2,5), (2,7), (3,5), (3,6),
  (3,7) (4,6), (4,7), (5,7) and (6,7). Is it planar
  or nonplanar ? If it is planar, embed it in the
  plane and obtain the protection cycles for the
  network as face boundaries. If it is nonplanar,
  find an orientable CDC.
• 2)
• 3) Compare different line protection schemes
  (11), (11),BLSR and Mesh. what do they protect
  against, topology, contstraints and deficiencies
  ?

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15
12
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20
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11
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- Find different faces for the planar case ? -
How many describes the total graph ?
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9
6
7
10
8
3
4
5
1
2
Should be returned 4.12.00