Simulation of Ring-based Passive Optical Network and Its ...
The impact of ring access network, For Business Customers On the shape of the Cable Network
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Transcript of The impact of ring access network, For Business Customers On the shape of the Cable Network
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The impact of ring access network,
For Business CustomersOn the shape of the Cable
Network
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FP Flexibility Point
Local Exchange
The usual copper network
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The usual copper network (2)
R 1 km ?
Zone of a FP
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The mapping of the FP
For the copper network and the mobile network, the mapping of the FP or the BTS is often shown as on this pattern
FP
FP
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Ring structure
This sketch is focussed on a SDH ring with some Add/Drop Muxes
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Addition of Flexibility Points in the Ring Structure
Node
FP
FP
FPShare of the network between
Transport : Node FP
Distribution : FPFP
Issue of way : from the node and to the node.
In a cable, management of the way of every fibre. (Not so simple that on the sketch)
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The range of the FP or couple of FP
In a tree and branch local loop, servicing area of a FP : a circle
In a ring structure, servicing area of a couple of FPs : an ellipse
FP
FP1 FP2
L1 L2R
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Introducing a 3rd FPWhat area will be covered by the couple B-C, C-A and A-B ?
Covered by BC :
MB+MC<MC+MAMB+MC<MA+MB
MB<MA & MC<MA
A
B
C
M
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Introducing a 3rd FP (2)
A
B
C
AC
AB
BC
We find an unexpected allocation of space
Some comments :The area AC does not include a large part of the segment ACIf the angle B is obtuse, the area AC does not include any part of the segment AC
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Comparison of Tree/Ring
A
B
C
AC
AB
BC
A
B
C
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Comparison of Tree/Ring
• The limits are in both architectures the medians
• But the sectors defined are opposite
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Introducing a 3rd FP (3)
A
B
C
AC
AB
BC
We come back to ellipses
The centre of the circle ABC (radius =R) is on every ellipse
For every area, the total distance for joining both FP is less than 2R.
You see the poor area AC
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Organisation of FPs
Instead of the hexagon and square, we have some patterns a little bit different, and useful for modelisation
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ConclusionFor more FPs, the drawing is tedious for few results.
One result : when you have an obtuse angle B in a triangle ABC, a cable between A & C is generally of no use.
A number of questions are in consideration and depend on the specific topology of the area :
• What is the optimal distance between the FPs, with the density of customers ?
• Or what is the number of customers in an area ?
• Be the transport cables one way or two ways ?
• Optimum number of ADMs in a ring ?
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Thank you
Node
The capillaries : complicated network. Transport is simple.
Size of the capillary network ? Addition of FP allows having smaller capillarity network.
In a ring, you have two fibres, one clockwise, the other in trigonometrically way.
Post conclusion