useful website for IMS

http://doubango.org/

https://groups.google.com/forum/#!forum/doubango

https://code.google.com/p/telepresence/source/browse/#svn%2Ftrunk%2Fsource%253Fstate%253Dclosed

https://code.google.com/p/doubango/

http://www.cse.tkk.fi/fi/opinnot/T-110.7111/2012/luennot-files/momib12_4.pdf

http://www.mmihome.net/portal.php?mod=list&catid=6&page=3

http://www.dzbzw.com/dzbk/04252011/13019.html

http://airccse.org/journal/ijngn/papers/0610jngn1.pdf

http://www.staff.city.ac.uk/~veselin/publications/Sivchenko_ACM07.pdf

http://www.diva-portal.org/smash/get/diva2:448278/ATTACHMENT01

http://www.openimscore.org/download

https://github.com/Metaswitch/clearwater-docs/wiki

http://www.fokus.fraunhofer.de/en/fokus_testbeds/open_ims_playground/components/osims/index.html

https://code.google.com/p/the-ims-open-source-project-for-android/source/browse/ims-parser/src/javax/microedition/ims/messages/wrappers/common/Param.java

http://comp.ist.utl.pt/ec-ra/Laboratorio/Fokus%20Open_IMS_Core.pdf

http://en.wikipedia.org/wiki/IMS_Global

http://en.wikipedia.org/wiki/Home_Subscriber_Server#IP_Multimedia_Private_Identity

http://en.wikipedia.org/wiki/Gateway_Control_Protocol

http://www.rennes.enst-bretagne.fr/~gbertran/files/IMS_an_overview.pdf

http://www.baike.com/wiki/IMS

http://www.baike.com/wiki/CSCF

http://blog.chinaunix.net/uid-507545-id-96846.html

http://blog.youkuaiyun.com/ljinddlj/article/details/3912747

http://zh.wikipedia.org/wiki/%E5%AE%89%E5%85%A8%E5%AE%9E%E6%97%B6%E4%BC%A0%E8%BE%93%E5%8D%8F%E8%AE%AE

http://numb.viagenie.ca/

http://nil.uniza.sk/ngnims/six-open-source-ims-clients-features-overview-february-2012