Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
MME in LTE/SAE Wireless Data Services
▀ How MME Works
▄ Cisco ASR 5000 Series Product Overview
OL-22937-01
Paging Procedure
Paging is initiated when there is data to be sent to an idle UE to trigger a service request from the UE. Once the UE
reaches connected state, the data is forwarded to it.
reaches connected state, the data is forwarded to it.
Paging retransmission can be controlled by configuring a paging-timer and retransmission attempts on system.
Subscriber Session Processing
This section provides information on how LTE/SAE subscriber data sessions are processed by the system MME. The
following procedures are provided:
following procedures are provided:
User-initiated Transparent IP: An IP EPS Bearer context request is received by the MME from the UE for a PDN. The
subscriber is provided basic access to a PDN without the MME authenticating the subscriber. Either a static or dynamic
IP address can be assigned to the MS in this scenario.
subscriber is provided basic access to a PDN without the MME authenticating the subscriber. Either a static or dynamic
IP address can be assigned to the MS in this scenario.
User-initiated Non-transparent IP: An IP EPS Bearer context request is received by the MME from the UE for a PDN.
The MME provides subscriber authentication services for the data session. Either a static or dynamic IP address can be
assigned to the MS in this scenario.
The MME provides subscriber authentication services for the data session. Either a static or dynamic IP address can be
assigned to the MS in this scenario.
Network-initiated: An IP EPS Bearer context request is received by the MME from the PDN for a specific subscriber. If
configured to support network-initiated sessions, the MME, will initiate the process of paging the MS and establishing a
EPS Bearer context.
configured to support network-initiated sessions, the MME, will initiate the process of paging the MS and establishing a
EPS Bearer context.
Subscriber Registration Setup Procedure
The following figure and the text that follows describe the message flow for a successful user-initiated subscriber
registration setup procedure.
registration setup procedure.