A high speed wireless network for the access market where a polling mode, a contention mode, a seamless transition between the two modes and an efficient contention resolution algorithm are utilized to coordinate user transmission while utilizing a splitting tree algorithm to avoid collision of a number of users.

 
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< Portable information processing device having data evacuation function and method thereof

< Updating computer files on wireless data processing devices

> Unified messaging system configured for management of short message service-type messages

> System and method of switching between calls when handing off a mobile station out of a WLAN
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