WCDMA Introduction

http://loda.hala01.com/2009/04/wcdmaumts-%E7%AC%AC%E4%B8%89%E4%BB%A3%E7%84%A1%E7%B7%9A%E9%80%9A%E8%A8%8A%E7%B3%BB%E7%B5%B1-core-network-%E6%9E%B6%E6%A7%8B%E4%BB%8B%E7%B4%B9%EF%B9%9D1%EF%B9%9E/