Buch, Englisch, 166 Seiten, HC runder Rücken kaschiert, Format (B × H): 160 mm x 241 mm, Gewicht: 442 g
Data Replication Strategies and Applications
Buch, Englisch, 166 Seiten, HC runder Rücken kaschiert, Format (B × H): 160 mm x 241 mm, Gewicht: 442 g
ISBN: 978-1-4020-7896-5
Verlag: Springer US
In wireless communication systems, the network keeps track of a user’s location through an up-to-date user profile stored in various databases. A user profile contains not only a user’s current location information, but also service information, such as billing and authentication. The cov- age area of an access network is divided into registration areas (RAs), and each RA is associated with a location database. The two basic op- ations in mobility management are location update and location lookup. When a user moves across the boundaries of these RAs, the network updates his location information in the pertinent databases. When a caller places a call using the callee’s identification, the network queries the relevant database(s) to obtain the current location and other service information of the callee. The performance of mobility management can be further enhanced by using replicas of user profiles which may be kept at various locations. Replication techniques make profile information more readily available, thus reducing lookup cost and latency, but to keep these replicas c- sistent and fresh, they must be updated whenever the user profile is updated. The principle of replication is to replicate if the benefit of replication is greater than its overhead. The difficulty, however, lies in accurately measuring the benefit and overhead.
Zielgruppe
Research
Autoren/Hrsg.
Fachgebiete
- Interdisziplinäres Wissenschaften Wissenschaften: Forschung und Information Informationstheorie, Kodierungstheorie
- Wirtschaftswissenschaften Betriebswirtschaft Wirtschaftsmathematik und -statistik
- Technische Wissenschaften Elektronik | Nachrichtentechnik Elektronik Mikroprozessoren
- Mathematik | Informatik EDV | Informatik EDV & Informatik Allgemein EDV & Informatik: Ausbildung & Berufe
- Mathematik | Informatik EDV | Informatik Technische Informatik Externe Speicher & Peripheriegeräte
- Wirtschaftswissenschaften Volkswirtschaftslehre Volkswirtschaftslehre Allgemein Ökonometrie
- Mathematik | Informatik EDV | Informatik Daten / Datenbanken Informationstheorie, Kodierungstheorie
- Mathematik | Informatik EDV | Informatik Technische Informatik Netzwerk-Hardware
- Mathematik | Informatik EDV | Informatik Daten / Datenbanken Zeichen- und Zahlendarstellungen
Weitere Infos & Material
Preface.- Acknowledgements.- 1: Introduction. 1.1. Book Outline.- 2: Mobility Management. 2.1. Background. 2.2. Mobility Management Techniques. 2.3. Profile Replicatio. 2.4. Related Work. 2.5. Summary.- 3: Off-Line Replication. 3.1. Related Work. 3.2. Optimization Objectives. 3.3. Replication for Unicast Replica Update (UR). 3.4. Replication for Multicast Replica Update (MR). 3.5. Comparison between UR and MR. 3.6. Summary.- 4: On-Line Replication. 4.1. Related Work. 4.2. Edge Algorithms. 4.3. Tree Algorithms. 4.4. Implementation Issues. 4.5. Summary.- 5: Computer Simulations. 5.1. Simulation Environment. 5.2. Off-Line Replication. 5.3. On-Line Replication. 5.4. Summary.- References.- Index.
