1 NTT Access Network Service System Laboratories

1
Cooperative technique to optimize total
allocation time in heterogeneous domains in an
Optical Access Network

• 2003-10-2
• NTT Access Network Service Systems Laboratories
• Shunsuke Kanai, Akira Inoue and Hiroshi Uno

2
Outline

• 1. OAN configuration and Characteristics in
  I-ODN
• 2. Current issues and goal
• 3. Identifying causes and proposed technique

3
Overview
OAN(Optical access network)
Intra-office
SE(PON)
J-CR
CR1
PKG1
PKG1
ONU
PKG2
CR2
PKG3
Splitter
O-ODN-D
I-ODN-D
SE-D
4
Comparison-1

• Cost Analysis

Medium demand
Limited demand
J-CR1
SE
CR1
PKG1
Type-1
CR2
Splitter
Splitter
J-CR1
SE
CR1
PKG1
Type-2
PKG2
CR2
5
Comparison-2

• Analysis of total allocation time

Limited demand
J-CR
SE
CR1
PKG1
Type-1
CR2
CR3
Port occurred demand
SE
J-CR
CR1
PKG1
PKG2
Type-2
CR2
PKG3
CR3
Port occurred demand
6
Comparison-3

• Comparison of results

2000
5000
4000
1500
3000
Total allocation time
1000
Total cost
2000
500
1000
0
0
0
100
200
300
400
500
0
100
200
300
400
500
Number of demands
Number of demands
Comparison of total allocation time
Comparison of construction costs
7
Current issues and goal

• Trade-off between Types 1 and 2

Cost
Time
long
low
short
Type 2
short
Type 1
high
8
Identifying causes-1
Start
O-ODN-D
SE-D
I-ODN-D
CR1
J-CR
SE
CR2

CRP

CRM
9
Identifying causes-2
Start
O-ODN-D
SE-D
I-ODN-D
CR1
J-CR
SE
CR2

CRP

CRM
10
Identifying causes-3
Number of times to allocate for PKGs
Times
All PKGs
1
Number of candidates for one allocation in SE
PKG candidates ONE
PKG candidates ALL
Number of times to send receive
Number of times to allocate for PKGs
11
Proposed technique
SE-D
I-ODN-D
CR
Total allocation time
12
First simulation
CR
2 10 5 1 1
PKG
1
J-CR
2
SE
n19


9
n1Number of CRs with Splitter
100
T(N)aß?
Total allocation time
75
Optimum number of candidates
50
1
2
3
4
5
6
7
8
9
Number of candidates (N)
13
Second simulation
120000
Type 2 (Conventional method)
Type 2 (Proposed method)
80000
Total allocation time
40000
0
0
100
200
300
400
500
Number of demands
14
Conclusion and future work

• Conclusion
• Cost efficiency in an I-ODN improves by
  positioning the splitter at installation with
  increasing demand for PON service.
• Total allocation time can be reduced by changing
  the number of PKG candidates
• Future Work
• Improve efficiency of allocation algorithm in
  heterogeneous domains

15
Cooperative technique to optimize total
allocation time in heterogeneous domains in an
Optical Access Network

• 2003-10-2
• NTT Access Network Service Systems Laboratories
• Shunsuke Kanai, Akira Inoue and Hiroshi Uno

16
Reference

• Cost Analysis

SE-D1
I-ODN-D
O-ODN-D
ServiceTypeA
SE-D2
ServiceTypeB
SE-D3
ServiceTypeC
.
.