30-08-2013, 04:33 PM
Session Management
Session Management.pdf (Size: 92.89 KB / Downloads: 13)
Introduction
• Session Management (SM) establishes, modifies
and releases packet data sessions with well
defined QoS between UE and GGSN
• Packet session attributes are called PDP contexts
• A UE may have more than one PDP context
simultaneously, each with a SM protocol entity
PDP Context Modification by network
• GGSN (below blue line) or SGSN (above line, without blue messages)
can initiate the network PDP context modification procedure
• If UE does not accept the PDP context modification request, it shall
initiate the PDP context deactivation procedure instead