Cisco ASR 5000 Series User Manual

Mobility Management Entity Overview
▀ How MME Works
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
15. S-GW modify the session for this UE and sends Modify Bearer Request response to MME.
Network-initiated Service Request Procedure
The following figure and the text that follows describe the message flow for a successful network-initiated service
request procedure.
Figure 211. Network-initiated Service Request Message Flow
1. Downlink data received on S-GW from PDN for targeted UE.
2. S-GW sends Downlink Data notification to MME for a targeted UE.
3. MME sends Downlink Data notification acknowledgement to S-GW.
4. MME send Paging request to eNodeB for targeted UE.
5. eNodeB broadcasts Paging request in its coverage area for UE.
6. Once identified UE located S-GW and eNodeB starts messaging through UE Paging response.
7. S-GW sends Stop Paging message to MME.
8. Data downlink starts between identified UE and PDN.

Cisco ASR 5000 Series Specifications

General

Brand	Cisco
Model	ASR 5000 Series
Category	Network Router
Language	English