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| 附加的形体格式： | Online version: Sikora, Axel. Wireless personal and local area networks. Chichester, West Sussex, England ; Hoboken, NJ : Wiley, c2003 (OCoLC)594249953 Online version: Sikora, Axel. Wireless personal and local area networks. Chichester, West Sussex, England ; Hoboken, NJ : Wiley, c2003 (OCoLC)606982130 |
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| 材料类型： | 互联网资源 |
| 文件类型： | 书, 互联网资源 |
| 所有的著者/提供者： |
Axel Sikora |
| ISBN: | 0470851104 9780470851104 |
| OCLC号码： | 51095744 |
| 描述： | xiii, 195 p. : ill. ; 25 cm. |
| 内容： | 1.1 Definition and restriction 1 -- 1.2 Overview of advantages and disadvantages 1 -- 1.3 Applications overview 3 -- 1.3.1 Adding value by using a WLAN 3 -- 1.3.2 Mobile workstations 3 -- 1.3.3 Reducing the number of network cable connections 4 -- 1.3.4 Training centres 4 -- 1.3.5 Mobile data entry systems 4 -- 1.3.6 Hot spots 5 -- 1.3.7 External networking 5 -- 1.3.8 Wireless Local Loop 5 -- 1.3.9 Industrial applications 5 -- 1.3.10 Ad hoc networking 5 -- 1.4 Market events 6 -- 1.4.1 Initial situation 6 -- 1.4.2 The "new market" 6 -- 1.4.3 Technologies in competition 8 -- 1.4.4 Convergence 8 -- 1.4.5 Interconnection instead of intermingling 8 -- 1.4.6 Supplier positioning 9 -- 1.4.7 Differentiating between the manufacturers 10 -- 1.4.8 Growing market 12 -- 1.5 Organisations and governing bodies 12 -- 1.5.1 Telecommunications regulators 13 -- 1.5.2 Standards and standardisation committees 13 -- 1.5.3 De facto standards and interest groups 14 -- 2.1 History of wireless messaging 17 -- 2.1.1 Wireless vs. wired 17 -- 2.1.2 Optical telegraphy 17 -- 2.1.3 Using electromagnetic waves 18 -- 2.1.4 The wireless precursors to Ethernet 18 -- 2.1.5 Modern use of optical systems 19 -- 2.2 Technical communication models and classification 20 -- 2.2.1 Reference models 20 -- 2.2.2 Classification of channel access 22 -- 2.2.3 Physical communication model 23 -- 2.2.4 Communications classification system 23 -- 2.3 Demands on transfer networks 26 -- 2.3.1 Traffic types 26 -- 2.3.2 Transfer speed 27 -- 2.4 Properties of electromagnetic waves 28 -- 2.4.1 Maxwellian equations 28 -- 2.4.2 The diffusion of electromagnetic waves 28 -- 2.4.3 Limitations on the diffusion of electromagnetic waves 29 -- 2.4.4 Using light for communications 32 -- 2.5 Digital modulation technology 33 -- 2.5.1 Basic principles 33 -- 2.5.2 Phase shift keying 35 -- 2.5.3 Frequency or phase shift keying 37 -- 2.6 Channel access 38 -- 2.6.2 Time division multiple access 38 -- 2.6.3 Frequency multiplex procedure 38 -- 2.6.4 Combined procedure 39 -- 2.6.5 Space division multiple access 39 -- 2.7 Spread spectrum techniques 39 -- 2.7.2 Frequency hopping spread spectrum procedure 41 -- 2.7.3 Direct sequence spread spectrum process 41 -- 2.8 Orthogonal frequency division multiplex procedure 43 -- 2.9 Antennae 45 -- 2.9.1 Isotropic and anisotropic antennae 45 -- 2.9.2 Diversity 45 -- 2.9.3 Polarisation 46 -- 2.9.4 Location 46 -- 2.9.5 Selection 47 -- 2.10 Special features of wireless networks 47 -- 2.10.1 Wireless networks use a common medium 47 -- 2.10.2 Spatial characteristics 48 -- 2.11 Frequency allocations 48 -- 3 Applications, devices and standards 51 -- 3.1 Application scenarios 51 -- 3.1.1 Personal Area Networks 51 -- 3.1.2 Local Area Networks 52 -- 3.1.3 SoHo LANs 52 -- 3.1.4 Office LANs 52 -- 3.1.5 Connecting networks 53 -- 3.2 Device types 53 -- 3.3 Standards 54 -- 4 IEEE802.11 57 -- 4.1 The standard 57 -- 4.1.1 Positioning 57 -- 4.1.2 Structure 58 -- 4.1.3 Extensions 58 -- 4.2 Architectures 59 -- 4.2.1 System architectures 59 -- 4.2.2 Protocol architecture 60 -- 4.3 Channel access 61 -- 4.3.1 Where it fits in 61 -- 4.3.2 Distributed Coordination Function 62 -- 4.3.3 RTS-CTS mechanism 67 -- 4.3.4 Fragmentation of long messages 70 -- 4.3.5 Point Coordination Function 71 -- 4.3.6 Frame formats in the MAC layer 73 -- 4.3.7 Managing stations 76 -- 4.3.8 Addressing stations 80 -- 4.4 The Physical layer and bit transfer 81 -- 4.4.1 Where it fits in 81 -- 4.4.2 Frequency Hopping Spread Spectrum 81 -- 4.4.3 Direct Sequence Spread Spectrum 83 -- 4.5 Other services 86 -- 4.5.1 Synchronisation 86 -- 4.5.2 Power-saving mode 86 -- 4.5.3 ESS services 86 -- 4.6 Security 86 -- 4.7 Extensions to the standard 88 -- 4.7.1 The IEEE802.11a standard 88 -- 4.7.2 The IEEE802.11b standard 89 -- 4.7.3 Other standards 92 -- 5 Bluetooth 95 -- 5.1 The standard 95 -- 5.1.2 Structure 96 -- 5.1.3 Standard Bluetooth elements 97 -- 5.1.4 Profiles 98 -- 5.2 Architectures 99 -- 5.3 Channel access 99 -- 5.3.1 Prioritisation 99 -- 5.3.2 Frame formats 102 -- 5.3.3 Audio transmission 103 -- 5.4 Controlling states 104 -- 5.4.2 Establishing a connection 105 -- 5.4.3 Operating a connection 107 -- 5.4.4 Addressing 108 -- 5.5 Bit transfer 108 -- 5.6 Security 110 -- 5.7 System implementation 110 -- 6 DECT 113 -- 6.1 The standard 113 -- 6.2 Architectures 113 -- 6.3 Channel access 114 -- 6.4 Bit transfer 115 -- 6.5 Application profiles 115 -- 6.5.1 Voice telephony 115 -- 6.5.2 Data transmission 116 -- 7 HomeRF 117 -- 7.1 The standard 117 -- 7.2 Architectures 117 -- 7.2.1 System architecture 117 -- 7.2.2 Protocol architecture 118 -- 7.3 Channel access 119 -- 7.3.1 Where it fits in 119 -- 7.3.2 Asynchronous transfer 120 -- 7.3.3 Synchronous transfer 120 -- 7.3.4 Isochronous transfer 120 -- 7.4 Bit transfer 121 -- 7.4.1 1 MHz channels 121 -- 7.4.2 5 MHz channels 122 -- 8 HiperLAN/2 123 -- 8.1 The standard 123 -- 8.1.1 Supplier positioning 123 -- 8.1.2 Market launch 124 -- 8.2 Architectures 125 -- 8.2.1 System architecture 125 -- 8.2.2 Protocol architecture 125 -- 8.3 Channel access 127 -- 8.4 Bit transfer 130 -- 8.4.1 Frequency allocations 130 -- 8.4.2 Modulation procedures 131 -- 8.5 Other services 132 -- 8.6 The HiperLAN/2 standard versus IEEE802.11a 132 -- 9 Operating an IEEE802.11b-compliant WLAN 133 -- 9.2 Mobile stations 133 -- 9.2.1 Construction types 133 -- 9.2.2 Capabilities 133 -- 9.2.3 Administration 134 -- 9.3 Access points 136 -- 9.3.1 Structure 136 -- 9.3.2 Capabilities 138 -- 9.3.3 Administration 138 -- 9.4 Extended networks 141 -- 9.4.1 Linked networks 141 -- 9.4.2 Structured networks 141 -- 9.4.3 High user densities 142 -- 9.4.4 Administering extended networks 142 -- 9.5 Network analysis 143 -- 9.5.2 Simple analysis tools 143 -- 9.5.3 Sniffers 146 -- 9.6 Examples from real life 148 -- 9.6.1 LAN-LAN connection 148 -- 9.6.2 Mobile computer room 150 -- 9.6.3 Changing stations in the hotel 151 -- 10 Various aspects of WLAN technology 153 -- 10.1 Security 153 -- 10.1.2 Security risks 154 -- 10.1.3 Countermeasures 155 -- 10.2 Sources of interference 161 -- 10.2.2 Influence caused by identical systems 162 -- 10.2.3 Influence caused by competing systems 162 -- 10.2.4 Influence caused by other radio networks 163 -- 10.2.5 Influence caused by other noise pulse generators 163 -- 10.3 Selecting a spread spectrum technique 163 -- 10.3.2 Spectral efficiency 164 -- 10.3.3 Security against eavesdropping 164 -- 10.3.4 Sensitivity to interference 165 -- 10.4 Aspects of EMT interference 165 -- 10.4.2 Regulations 165 -- 10.4.3 Comparison with GSM mobile telephony 165 -- 10.5 WLANs and TCP/IP 166 -- 10.6 Deciding factors 167 -- 10.6.2 Selecting a LAN technology 168 -- 10.6.3 Selecting a WLAN technology 168 -- 10.6.4 Selecting a WLAN product 168 -- 10.7 Future prospects 169 -- A.1 Maxwellian equations 171 -- A.2 Physical basis of direct sequence spread spectrum process 171 -- A.3 Directional antennae 174 -- B.1 English-language publications 179 -- B.2 German-language publications 182. |
| 责任： | Axel Sikora. |
| 更多信息： |
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