Siemens IEEE802.11 Manual de usuario Pagina 61
- Pagina / 84
- Tabla de contenidos
- MARCADORES
- Maximilian Riegel 1
- The ubiquitous WLAN 2
- WLAN has taken off 3
- Part 1: 5
- Internet/Web Applications 6
- Layering means encapsulation 7
- ,QWHUQHW 8
- IP based network architecture 9
- Wireless LAN IEEE802.11 10
- Part 2: IEEE802.11 Overview 12
- Wireless IEEE802.11 Standard 13
- IEEE802.11 Configurations 14
- Wireless LAN Standardization 17
- Part 3: Physical layer 18
- IEEE802.11 19
- AMPLITUDE 20
- FREQUENCY 20
- Spectrum 21
- IEEE802.11a 5GHz PHY Layer 23
- IEEE802.11g: Further Speed 24
- Extension for the 2.4GHz Band 24
- IEEE802.11h: Spectrum and 26
- Transmit Power Management 26
- … when will 5 GHz WLANs come? 27
- PHY Terminology 28
- PLCP Protocol Data Unit 29
- Part 4: Medium Access Control 30
- CSMA/CA Explained 32
- CSMA/CA + ACK protocol 33
- Station 1 34
- Station 2 34
- Station 3 34
- Station 4 34
- “Hidden Node” Provisions 35
- IEEE802.11e: MAC Enhancements 36
- Contention Free Period 37
- Contention Period 37
- CFP repetition interval 37
- Frame Formats 39
- Address Field Description 40
- , © Siemens, 2002 41
- Part 5: MAC layer management 42
- Scanning 45
- Active Scanning Example 46
- Power Management Approach 48
- Power Management Procedure 49
- MAC Management Frames 50
- Part 6: WLAN Mobility 51
- IEEE802.11 Ad Hoc Mode 52
- Distribution System (DS) 53
- ORFDOGLVWULEXWLRQQHWZRUN 54
- IEEE802.11f: 55
- Part 7: WLAN security 56
- • a 40 bit secret key 57
- WEP privacy mechanism 58
- Shared key authentication 59
- IEEE802.11i: 61
- Robust Security Network (RSN) 61
- Summary: MAC Functionality 63
- FXVWRPHUHTXLSPHQW 65
- VHOIH[SODLQLQJ 65
- Probably to consider … 68
- Selection of billing method 69
- How does it work: 70
- Web based access control 70
- GSM/GPRS/UMTS 75
- WLAN IEEE802.11 75
- WLAN – UMTS Interworking: 76
- ORJDULWKPLFVFDOH 78
- Conclusions for 79
- Mobile Network Operators 79
- '+&3 82
- SMS containing Password 82
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