http://blog.csdn.net/wireless_tech/article/details/7429455
http://blog.csdn.net/nanyun2010/article/details/23445223
http://blog.163.com/lqy_super/blog/static/1997510212013259446355/
http://blog.csdn.net/wireless_tech/article/details/7429455
http://blog.csdn.net/nanyun2010/article/details/23445223
http://blog.163.com/lqy_super/blog/static/1997510212013259446355/