QoS-based Wavelength Routing in Multi-Service WDM NetworksSpringer Science & Business Media, 26 февр. 2001 г. - Всего страниц: 244 The need to establish wavelength-routed connections in a service-differentiated fash ion is becoming increasingly important due to a variety of candidate client networks (e. g. IP, SDH/SONET, ATM) and the requirements for Quality-of-Service (QoS) de livery within transport layers. Up until now, the criteria for optical network design and operation have usually been considered independently of the higher-layer client signals (users), i. e. without taking into account particular requirements or constraints originating from the users' differentiation. Wavelength routing for multi-service net works with performance guarantees, however, will have to do with much more than finding a path and allocating wavelengths. The optimisation of wavelength-routed paths will have to take into account a number of user requirements and network con straints, while keeping the resource utilisation and blocking probability as low as pos sible. In a networking scenario where a multi-service operation in WDM networks is assumed, while dealing with heterogeneous architectures (e. g. technology-driven, as transparent, or regenerative), efficient algorithms and protocols for QoS-differentiated and dynamic allocation of physical resources will playa key role. This work examines the development of multi-criteria wavelength routing for WDM networks where a set of performances is guaranteed to each client network, taking into account network properties and physical constraints. |
Содержание
Introduction | 1 |
11 This thesis | 4 |
A QoSbased optical networking | 6 |
22 Wavelengthrouted network architecture | 11 |
221 Applications and waveband hierarchies | 17 |
23 A QoSselective architecture | 24 |
24 Basic management and control issues | 29 |
241 QoS management for wavelengthrouted networks | 33 |
5321 General algorithm with graph transformation | 139 |
5322 Least quality wavelength routing with graph transformation | 142 |
5323 Servicespecific minimisation of wavelength shifting | 143 |
5324 Servicespecific signal regeneration | 144 |
533 Separation of service attributes and routing function | 146 |
534 A distributed QoSrouting method | 147 |
54 Methods for servicespecific restoration | 150 |
5411 Dynamic path restoration DPR | 153 |
25 Restoration in wavelengthrouted networks | 34 |
251 A simple taxonomy for service restoration | 36 |
252 Optical network service restoration | 43 |
Servicedifferentiated connection setup | 47 |
32 Client layer perspectives | 50 |
33 The basic model for connection management | 56 |
34 Connection and resource management architecture | 59 |
341 Parameter translation between optical and nonoptical layers | 60 |
3412 Restorability | 61 |
3414 Security | 62 |
351 The basic flows for the servicespecific connection setup | 66 |
352 A functional model for servicespecific restoration | 69 |
The methods based on graph transformation | 72 |
42 Abstraction of the network state representation | 75 |
422 Graph transformation | 79 |
423 Weight labelling | 87 |
4231 Network element allocation | 88 |
4232 Network element connection | 90 |
424 Operations with multidimensional metrics | 92 |
425 Solving routing problems with single mixed metric | 97 |
426 Solving routing problems with multiple metrics QoS routing | 99 |
427 Multiconstraint routing problem revisited | 101 |
Algorithms for QoSbased wavelength routing | 104 |
52 Benefits of wavelength shifting | 110 |
521 Mathematical modelling | 112 |
522 Influence of load correlation | 117 |
523 Sparse and limitedrange wavelength shifting | 120 |
53 Algorithms for servicespecific wavelength routing | 122 |
531 The methods with servicespecific wavelength grouping | 123 |
5311 Least quality wavelength allocation | 126 |
5312 Minimisation of resource utilisation | 130 |
5313 Alternate routing for overloaded multiwavelength resources | 136 |
532 The algorithms based on graph transformation | 137 |
5412 Dynamic link restoration DLR | 155 |
5414 Static link restoration SLR | 156 |
5415 Shared wavelength path restoration SWPR | 157 |
5417 A comparison between different restoration methods | 158 |
5418 Linkdisjoint path algorithm | 160 |
5419 Nodedisjoint path algorithm | 162 |
Performance study and numerical results | 164 |
62 Traffic generation | 165 |
621 Binomial and Poisson distributions | 166 |
622 Random traffic generation and confidence intervals | 170 |
6221 Transient phase | 171 |
6222 Method of independent replications and batch means | 172 |
63 Network topology | 174 |
631 Randomly generated graphs | 176 |
64 Shortest path algorithms revisited | 179 |
65 Wavelength routing without servicespecific requirements | 180 |
651 Benefits of wavelength shifting | 181 |
6511 Network load | 182 |
6512 Number of wavelengths | 183 |
6513 Connectivity | 184 |
6514 Network size | 186 |
6515 Topology | 187 |
6516 Influence of load correlation | 190 |
6517 Sparse wavelength shifting | 194 |
6518 Final remarks regarding wavelength shifting | 197 |
66 Servicespecific wavelength routing | 199 |
662 Service restorability | 209 |
Conclusion and future world | 221 |
References and further reading | 223 |
234 | |
Index | 237 |
Другие издания - Просмотреть все
QoS-based Wavelength Routing in Multi-Service WDM Networks Admela Jukan Недоступно для просмотра - 2012 |
QoS-based Wavelength Routing in Multi-Service WDM Networks Admela Jukan Недоступно для просмотра - 2012 |
Часто встречающиеся слова и выражения
all-optical architecture AS-WS Bellman-Ford algorithm benefits of wavelength blocking probability Chapter client layer connection request connection set-up considered constraints cost CS-WS defined degradation distributed edges example exponentially distributed fibre free wavelengths function given graph transformation higher-layer ITU-T link restoration mesh-torus network metrics network elements network graph Network load Erl network operation network resources network topology number of hops number of wavelengths optical amplifiers optical layer optical network service optical nodes optical transport network parameters particular path restoration performance QoS-routing quality attributes quality degree regeneration requirements restoration methods restoration paths ring networks routers routing and wavelength S₁ SDH/SONET service class service type service-specific wavelength shown in Figure signal static strategy switching telecommunications management network tion traffic transmission quality transport network wave wavelength allocation wavelength continuity wavelength converters wavelength shifting wavelength-routed networks wavelengths per link WDM links WDM networks weight WRGT λε λε λι λι
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