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1. |
Record Nr. |
UNINA9910143688403321 |
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Titolo |
UMTS networks [[electronic resource] ] : architecture, mobility, and services / / Heikki Kaaranen ... [et al.] |
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Pubbl/distr/stampa |
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Chichester, West Sussex, England ; ; Hoboken, NJ, : J. Wiley & Sons, c2005 |
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ISBN |
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1-280-27445-X |
9786610274451 |
0-470-01105-X |
0-470-01104-1 |
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Edizione |
[2nd ed.] |
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Descrizione fisica |
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1 online resource (424 p.) |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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Mobile communication systems |
Wireless communication systems |
Global system for mobile communications |
Electronic books. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references (p. [399]-400) and index. |
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Nota di contenuto |
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UMTS Networks; Contents; Preface; Acknowledgements; PART ONE; 1 Introduction; 1.1 Specification Process for 3G; 1.2 Introduction to the 3G Network Architecture; 1.2.1 Conceptual Network Model; 1.2.2 Structural Network Architecture; 1.2.3 Resource Management Architecture; 1.2.4 Bearer Architecture; 2 Evolution from GSM to UMTS Multi-access; 2.1 From Analogue to Digital; 2.2 From Digital to Reachability; 2.3 Jump to Packet World and Higher Speeds; 2.4 3GPP Release 99; 2.5 3GPP Release 4; 2.6 3GPP Release 5; 2.7 Trends beyond 3GPP Release 5; PART TWO |
3 The Key Challenges Facing the Mobile Network Architecture3.1 Radio Communication Constraints; 3.2 Cellular Radio Communication Principles; 3.3 Multi-access Techniques; 3.4 Device Mobility; 3.5 Network Transport; 3.6 Transport Alternatives for UMTS; 3.6.1 Asynchronous Transfer Mode in UMTS; 3.6.2 IP Transport; 3.7 Network Management; 3.7.1 High-level Architecture of a Network Management |
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System; 3.8 Spectrum and Regulatory; 3.8.1 UMTS Spectrum Allocation; 4 Overview of UMTS Radio Access Technologies; 4.1 WCDMA Essentials; 4.1.1 Basic Concepts; 4.1.2 WCDMA Radio Channels |
4.1.3 WCDMA Frame Structure4.2 WCDMA Enhancement-HSDPA; 4.2.1 Introduction; 4.2.2 The Benefits and Impacts; 4.2.3 Basic Concept; 4.2.4 Adaptive Modulation and Coding; 4.2.5 Hybrid Automatic Repeat Request; 4.2.6 Fast Scheduling; 4.2.7 Seamless Cell Change; 4.2.8 Basic Operation and Architectural Considerations; 4.3 GSM/EDGE; 4.3.1 Basic Concepts; 4.3.2 Radio Channels and Frame Structures; 4.3.3 General Packet Radio Service (GPRS); 4.3.4 Enhanced Data Rates for Global/GSM Evolution (EDGE); 4.4 WLAN Technology; 4.4.1 Physical Technology; 4.4.2 Medium Access Control; 4.4.3 Network Formation |
5 UMTS Radio Access Network5.1 UTRAN Architecture; 5.2 Base Station (BS, Node B); 5.2.1 Base Station Structure; 5.2.2 Modulation Method; 5.2.3 Receiver Technique; 5.2.4 Cell Capacity; 5.2.5 Control Functions in BS; 5.3 Radio Network Controller (RNC); 5.3.1 Radio Resource Management (RRM); 5.3.2 UTRAN Control Functions; 6 UMTS Core Network; 6.1 UMTS Core Network Architecture; 6.1.1 Core Network Entities that Are Common to All Domains and Subsystems; 6.1.2 CS Domain; 6.1.3 PS Domain; 6.2 CN Management Tasks and Control Duties; 6.2.1 Mobility Management (MM); 6.2.2 Communication Management (CM) |
6.3 Charging, Billing and Accounting6.3.1 Charging and Accounting; 6.3.2 Billing; 6.4 IP Multimedia Subsystem (IMS); 6.5 IP Multimedia Subsystem Fundamentals; 6.6 IMS Entities and Functionalities; 6.6.1 Call Session Control Functions (CSCFs); 6.6.2 Databases; 6.6.3 Interworking Functions; 6.6.4 Service-related Functions; 6.6.5 Support Functions; 6.6.6 Charging Functions; 7 The UMTS Terminal; 7.1 Terminal Architecture; 7.2 Differentiation of Terminals; 7.3 Terminal Capabilities; 7.4 UMTS Subscription; 7.5 User Interface; 8 Services in the UMTS Environment; 8.1 About Services in General |
8.1.1 What Do Users Really Want? |
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Sommario/riassunto |
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Building on the success of the first edition, UMTS Networks second edition allows readers to continue their journey through UMTS up to the latest 3GPP standardization phase, Release 5. Containing revised, updated and brand new material, it provides a comprehensive view on the UMTS network architecture and its latest developments. Accompanied by numerous illustrations, the practical approach of the book benefits from the authors' pioneering research and training in this field. Provides a broad yet detailed overview of the latest worldwide developments in UMTS technology.<l |
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2. |
Record Nr. |
UNINA9910139596903321 |
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Autore |
Bauer Eric |
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Titolo |
Beyond redundancy : how geographic redundancy can improve service availability and reliability of computer-based systems / / Eric Bauer, Randee Adams, Dan Eustace |
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Pubbl/distr/stampa |
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Hoboken, New Jersey : , : Wiley-IEEE Press, , 2011 |
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[Piscataqay, New Jersey] : , : IEEE Xplore, , [2011] |
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ISBN |
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1-118-10493-5 |
1-283-28274-7 |
9786613282743 |
1-118-10492-7 |
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Descrizione fisica |
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1 online resource (332 p.) |
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Classificazione |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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Computer input-output equipment - Reliability |
Computer networks - Reliability |
Redundancy (Engineering) |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Figures xv -- Tables xix -- Equations xxi -- Preface and Acknowledgments xxiii -- Audience xxiv -- Organization xxiv -- Acknowledgments xxvi -- PART 1 BASICS 1 -- 1 SERVICE, RISK, AND BUSINESS CONTINUITY 3 -- 1.1 Service Criticality and Availability Expectations 3 -- 1.2 The Eight-Ingredient Model 4 -- 1.3 Catastrophic Failures and Geographic Redundancy 7 -- 1.4 Geographically Separated Recovery Site 11 -- 1.5 Managing Risk 12 -- 1.6 Business Continuity Planning 14 -- 1.7 Disaster Recovery Planning 15 -- 1.8 Human Factors 17 -- 1.9 Recovery Objectives 17 -- 1.10 Disaster Recovery Strategies 18 -- 2 SERVICE AVAILABILITY AND SERVICE RELIABILITY 20 -- 2.1 Availability and Reliability 20 -- 2.2 Measuring Service Availability 25 -- 2.3 Measuring Service Reliability 33 -- PART 2 MODELING AND ANALYSIS OF REDUNDANCY 35 -- 3 UNDERSTANDING REDUNDANCY 37 -- 3.1 Types of Redundancy 37 -- 3.2 Modeling Availability of Internal Redundancy 44 -- 3.3 Evaluating High- |
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Availability Mechanisms 52 -- 4 OVERVIEW OF EXTERNAL REDUNDANCY 59 -- 4.1 Generic External Redundancy Model 59 -- 4.2 Technical Distinctions between Georedundancy and Co-Located Redundancy 74 -- 4.3 Manual Graceful Switchover and Switchback 75 -- 5 EXTERNAL REDUNDANCY STRATEGY OPTIONS 77 -- 5.1 Redundancy Strategies 77 -- 5.2 Data Recovery Strategies 79 -- 5.3 External Recovery Strategies 80 -- 5.4 Manually Controlled Recovery 81 -- 5.5 System-Driven Recovery 83 -- 5.6 Client-Initiated Recovery 85 -- 6 MODELING SERVICE AVAILABILITY WITH EXTERNAL SYSTEM REDUNDANCY 98 -- 6.1 The Simplistic Answer 98 -- 6.2 Framing Service Availability of Standalone Systems 99 -- 6.3 Generic Markov Availability Model of Georedundant Recovery 103 -- 6.4 Solving the Generic Georedundancy Model 115 -- 6.5 Practical Modeling of Georedundancy 121 -- 6.6 Estimating Availability Benefit for Planned Activities 130 -- 6.7 Estimating Availability Benefit for Disasters 131 -- 7 UNDERSTANDING RECOVERY TIMING PARAMETERS 133 -- 7.1 Detecting Implicit Failures 134. |
7.2 Understanding and Optimizing RTO 141 -- 8 CASE STUDY OF CLIENT-INITIATED RECOVERY 147 -- 8.1 Overview of DNS 147 -- 8.2 Mapping DNS onto Practical Client-Initiated Recovery Model 148 -- 8.3 Estimating Input Parameters 154 -- 8.4 Predicted Results 165 -- 8.5 Discussion of Predicted Results 172 -- 9 SOLUTION AND CLUSTER RECOVERY 174 -- 9.1 Understanding Solutions 174 -- 9.2 Estimating Solution Availability 177 -- 9.3 Cluster versus Element Recovery 179 -- 9.4 Element Failure and Cluster Recovery Case Study 182 -- 9.5 Comparing Element and Cluster Recovery 186 -- 9.6 Modeling Cluster Recovery 187 -- PART 3 RECOMMENDATIONS 201 -- 10 GEOREDUNDANCY STRATEGY 203 -- 10.1 Why Support Multiple Sites? 203 -- 10.2 Recovery Realms 204 -- 10.3 Recovery Strategies 206 -- 10.4 Limp-Along Architectures 207 -- 10.5 Site Redundancy Options 208 -- 10.6 Virtualization, Cloud Computing, and Standby Sites 216 -- 10.7 Recommended Design Methodology 217 -- 11 MAXIMIZING SERVICE AVAILABILITY VIA GEOREDUNDANCY 219 -- 11.1 Theoretically Optimal External Redundancy 219 -- 11.2 Practically Optimal Recovery Strategies 220 -- 11.3 Other Considerations 228 -- 12 GEOREDUNDANCY REQUIREMENTS 230 -- 12.1 Internal Redundancy Requirements 230 -- 12.2 External Redundancy Requirements 233 -- 12.3 Manually Controlled Redundancy Requirements 235 -- 12.4 Automatic External Recovery Requirements 237 -- 12.5 Operational Requirements 242 -- 13 GEOREDUNDANCY TESTING 243 -- 13.1 Georedundancy Testing Strategy 243 -- 13.2 Test Cases for External Redundancy 246 -- 13.3 Verifying Georedundancy Requirements 247 -- 13.4 Summary 254 -- 14 SOLUTION GEOREDUNDANCY CASE STUDY 256 -- 14.1 The Hypothetical Solution 256 -- 14.2 Standalone Solution Analysis 259 -- 14.3 Georedundant Solution Analysis 263 -- 14.4 Availability of the Georedundant Solution 269 -- 14.5 Requirements of Hypothetical Solution 269 -- 14.6 Testing of Hypothetical Solution 277 -- Summary 285 -- Appendix: Markov Modeling of Service Availability 292 -- Acronyms 296. |
References 298 -- About the Authors 300 -- Index 302. |
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Sommario/riassunto |
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"This book provides both a theoretical and practical treatment of the feasible and likely benefits of geographic redundancy for both service availability and service reliability"-- |
"While geographic redundancy can obviously be a huge benefit for disaster recovery, it is far less obvious what benefit is feasible and likely for more typical non-catastrophic hardware, software, and human failures. Georedundancy and Service Availability provides both a theoretical and practical treatment of the feasible and likely benefits of |
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geographic redundancy for both service availability and service reliability. The text provides network/system planners, IS/IT operations folks, system architects, system engineers, developers, testers, and other industry practitioners with a general discussion about the capital expense/operating expense tradeoff that frames system redundancy and georedundancy"-- |
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