Cisco Cisco Packet Data Gateway (PDG) Wartungshandbuch

New Feature Summary

Generally Available    06-30-2010 

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This section provides information for new features for the GGSN Service in Release 8.0.

Starent Networks GGSN now supports Multimedia Broadcast and Multicast Service. The 
MBMS is an IP datacast type of service in GSM and UMTS cellular network. It eliminates 
unnecessary replication of data on UMTS wireless networks by transmitting a single stream 
of data to multiple users. By delivering a single, unidirectional data stream to many 
subscribers, MBMS makes more efficient use of wireless network resources than traditional 
point to point connections.

MBMS is a solution for transferring light video and audio clips and also a suitable method 
for mass communications. MBMS functionality on the system is provided by an existing 
GGSN and/or SGSN service license. In the absence of a valid license, the system functions 
as a standard unicast GGSN. When a GGSN is functioning in a MBMS environment, it 
supports Gmb protocol interface with Broadcast/Multicast Service Center (BM-SC) for 
messaging.

 shows the reference architecture of MBMS service in UMTS network.

Figure 1-2 MBMS Reference Architecture in UMTS network

For more details on configuration of this service, refer Multimedia Broadcast and Multicast 
Service chapter in System Enhanced Feature Configuration Guide.

Iu

Iu/Gb

Gn/Gp

GERAN

UTRAN

SGSN

GGSN

Gr

HLR

Multicast 

Broadcast 

Source

Multicast Broadcast 

Service Center

(BM-SC)

Gi

ASP/

Content Provider

Gi

PDN/Internet