A method and system for reliably returning to a traffic channel in a wireless communications system after performing E911 GPS measurements is provided. The method establishes a communications link using a device in a communications system having at least one communication channel. The device also includes...http://www.google.com.tw/patents/US20040029545?utm_source=gb-gplus-share專利 US20040029545 - Method and system for leaving a communication channel in a wireless communications system
