802.11 wireless 6

802.11 wireless 6
Bluetooth
1. Wireless Personal Network (WPAN) Radio System
2. Common link range: 10 meters/0dBm (100 meters/20dBm)
3. The transmission frequency is between 2.402 GHZ and 2.480 GHZ (if a hop frequency is used for a total of 79 channels)
4. The speed is up to 720 kb/s.
5. Three types of products, 100 mw, mw and 1 mw
6. No LOS restrictions
7. High Security


Content
1. the Bluetooth Network has a master and many slave devices.
2. Solved a simple problem, that is, replacing the cable connection between mobile devices and peripheral devices.
3. Bluetooth Technology tries to replace mobile users' cable connections
4. Its coverage area (cell) is called (piconet)
5. Bluetooth is designed to easily establish an ad-hoc network. Security is a problem (associated authentication)


Cordless phones
1. The telephone is used as a customer of the base station (similar to the base station ).
2. Use TDMA and FDMA for switching between telephone and Base Station
3. These protocols originated from ISDN
4. They are not compatible with WIFI, but use the same frequency range, and mutual interference and conversion channels in ISM


Zigbee
1. New short-distance mesh network standard-based on 802.15.4 standard-providing reliability through mesh connection
2. designed for low-power use-very long battery use time
3. Low Speed-20 to 250kb/s (based on band)
4. Self-Configuration
-Allow ad-hoc Networks
-Easy installation and configuration
5. Application: remote control, air conditioning, automation, etc.
6. Designed for inexpensive use, which is cheaper than wifi and Bluetooth


Zigbee network
1. incompatible with wifi
2. the ISM frequency band is prone to interference and uses low power.


WiMAX technology
1. WiMAX is a world-compatible microwave access technology.
2. IEEE802.16-2004 is a 915 page rule that includes point-to-point, point-to-point multipoint mesh access networks, and return link operations over 70 Mb/s in 30
There is no possibility of LOS in the 3.2-Ghz to 11-Ghz frequencies, and there is a serious LOS problem in the 10 Ghz to 66Ghz frequencies.
4. IEEE 802.16e-2005 includes mobile users, with a range of 40 Mb/s in 6
5. Standard in 2005 MIB
6. IEEE 802.16 has been supported by the Industrial Organization (WiMAX Forum ).


WiMAX technology content (802.16d)
1. Fixed WiMAX, based on 802.16d
2. Used for backbone links, similar to T1/E1 links
3. cables or WIFI are used in the last one.
4. Long distance high speed (50 miles, 70 Mb/s)


WiMAX technology content (802.16e)
1. The last use is based on 802.16e
2. Support for mobile users
3. backbones can use WiMAX or other technologies
4. LOS restrictions
5. The speed is as high as 40 Mb/s within 4-6, but it depends on distance and LOS