推送 push

REFERENCES:

MQTT

http://www.cnblogs.com/glony/articles/2308165.html

http://hi.baidu.com/zhu410289616/blog/item/c11aea5daa12c25ffbf2c01d.html

http://blog.csdn.net/joshua_yu/article/details/6563587

iphone push

http://w54653520.iteye.com/blog/1319595

http://code.google.com/p/javapns/