Abstract
1. Introduction
2. History and Development
3. Wireless Transmission and Mobile Transaction
4. Problems and Solutions
 4.1 Wireless Links among Hosts
 4.2 Batteries and Power Usage
 4.3 Connections on the Move
 4.4 Channel Signal Fading
 4.5 Indoor Radio Propagation
 4.6 Transmission of Multimedia Information
 4.7 Unpredictable End Segments of Channels
 4.8 Wireless channel security
5. Summary
6. Reference