Wireless WIFI technology II - WIFI, 3G and Bluetooth technology
1、 WIFI technology and 3G technology
1. Voice and WLAN
Compared with 3G technology that meets the requirements of large traffic and multi-user number, WLAN network based on IP technology is more suitable for carrying out broadcast voice services (PTT, multi-party conference, long-distance call, advertising, etc.).
2. Data services under wide area coverage and regional coverage
Compared with the characteristics of 3G technology, which covers a large area and can still maintain a data rate of 144kbit when moving fast, WIFI technology has absolute advantages in meeting the needs of users for high-speed data transmission in specific areas.
3. Utilization of wireless channel resources
The frequency resources allocated by 3G are limited, and the data service occupies a very high proportion of the channel, which affects the number of voice users simultaneously accessed. If we plan to transfer data services to the public data channel of WiFi/WiMAX in specific areas (such as densely populated areas in commercial centers), it will undoubtedly greatly improve 3G wireless network Resource utilization.
4. Combination of handheld terminal and Laptop/PDA
Laptop/PDA with high transmission data rate, Always0nLine and low usage fees can meet the demand of commercial users for large amount of information: more convenient and compact 3G handheld terminals can meet the demand of personal users for fast messages.
2、 WIFI and Bluetooth Technology
Bluetooth technology features:
Slow
It is generally used to transmit small data without network
Connecting Bluetooth accessories
Unable to connect to the Internet
Within 10m
Wi Fi technology features:
Can connect to the public network and provide network browsing function
Fast
Transfer big data
Within 100m
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