Complete Protocol dictionary, glossary and reference
GMM/SM: GPRS Mobility Management/Session Management
GPRS Mobility Management/Session Management (GMM/SM) protocol supports mobility management functionality of a mobile such as GPRS attach, GPRS detach, security, routing area update, location update. The main function of the Session Management (SM) layer is to support PDP context handling of the user terminal. SM comprises of procedures for the PDP context activation, deactivation, and modification. The GMM layer uses the services of the Radio Access Network Application Protocol (RANAP) over the Iu interface to provide these services.