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Understanding Weightless : Technology, Equipment, and Network Deployment for M2M Communications in White Space.
Essential for getting to grips with Weightless, this definitive guide describes and explains the new standard in an accessible manner.
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Cambridge :
Cambridge University Press,
2012.
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| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Cover; Understanding Weightless; Title; Copyright; Contents; Preface; Acknowledgements; About the author; 1: The world of machine communications; 1.1 What defines a machine?; 1.2 Range: short or long?; 1.3 Possible applications; 1.4 Key requirements; 1.5 Market size; 1.6 How machine communications could change our world; 2: The need for a new standard; 2.1 Machine communications does not yet have the necessary standard; 2.2 Barriers to delivering a machine communications network; 2.3 White space as a key enabler; 2.4 Design rules for a machine communication solution.
- 2.5 The Weightless Special Interest Group2.6 Summary; 3: Working in white space spectrum; 3.1 Defining white space; 3.2 Determining where the white space is; 3.3 The 'greyness' of white space; 3.4 Design rules for white space; 3.5 The US regulation; 3.6 The UK regulation; 3.7 Other countries; 3.8 Determining how much white space there is; 3.9 Regulation in other countries; 3.10 Other spectrum; 3.11 Conclusions; References; 4: Weightless in overview; 4.1 The key requirements; 4.2 Immediate design implications; 4.3 Subsequent design thinking; 4.4 System overview; 5: The network.
- 5.1 Introduction5.2 Functional elements; 5.2.1 Billing system; 5.2.2 Authentication and encryption; 5.2.3 Location register; 5.2.4 Broadcast register; 5.2.5 Base station controller; 5.3 Frequency assignment; 5.4 Code assignment; 5.5 Scheduling; 5.5.1 Traffic prioritisation; 5.5.2 Normalising power levels; 5.5.3 Avoiding antenna nulls; 5.5.4 Minimising interference; 5.5.5 Overall; 5.6 Calibration mode; 5.7 Load balancing; 5.7.1 Load imbalance; 5.7.2 New cell; 5.8 The network to base station interface; 5.9 Summary; 6: The MAC layer; 6.1 Overview; 6.2 Scheduled and contended access.
- 6.3 The frame concept6.3.1 Introduction; 6.3.2 The FCH; 6.3.3 The RS_MAP; 6.3.4 The DL_ALLOC and UL_ALLOC; 6.4 Acknowledgement; 6.5 Mapping data to resource allocations; 6.6 Terminal and group identities; 6.7 The contended access process; 6.7.1 Introduction; Length of CA slot; 6.7.2 Contended access: initial message flow; 6.7.3 Contended access for attach; 6.7.4 Contended access for resource; 6.8 Control messages; 6.9 Broadcast messages; 7: The physical layer; 7.1 Introduction; 7.2 Overview of the PHY layer; 7.3 Forward error correction (FEC)encoding; 7.4 Whitening; 7.5 Modulation.
- 7.6 Spreading7.7 Cyclic prefix insertion; 7.8 Synchronisation (sync)insertion; 7.9 Root raised cosine (RRC)pulse shaping; 7.10 Frequency hopping; 7.11 Downlink, uplink and TDD; 7.11.1 High data rate downlink; 7.11.2 Low data rate downlink; 7.11.3 Narrowband uplink; 7.11.4 Wideband uplink; 7.12 RF performance; 7.13 Antenna issues; 7.14 The attach process as an example; 7.14.1 Introduction; 7.14.2 Channel discovery; 7.14.3 Decode the FCH; 7.14.4 Send a contended access message to attach; 7.14.5 Undertake authentication; 7.14.6 Agree a schedule for the next transmitted message; Reference.