All IP architectures for cellular networks

There are several organisations developing specifications for "All IP" cellular networks; i.e., fully IP protocols based networks. The specification work is on going in established standard developing organisations such as 3GPP, 3GPP2, and IETF, as well as in different industry forums such as 3G.IP and MWIF. We introduce the most important forums involved in All IP development and describe the All IP concepts discussed in different forums. We discuss the differences and similarities of the architectures of these forums.