Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
New In This 8.0 Release
GGSN Features ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22937-01
GGSN Features
Multimedia Broadcast Multicast Service (MBMS)
TP PR = 3915, ST16 PR = 23415
Benefits
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.
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.
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.
Description
This is an enhanced feature and provides two mode of operations:
MBMS Broadcast Mode
MBMS Multicast Mode
A broadcast mode is a unidirectional point-to-multipoint service in which data is transmitted from a single source to
multiple terminals (UE/MS) in the associated broadcast service area/cell area. The transmitted data can be text to light
multimedia services (Audio, Video etc). On the other hand multicast mode is a unidirectional point-to-multipoint service
in which data is transmitted from a single source to a pre-defined multicast group of users that are subscribed to the
specific multicast service and have joined the multicast group in the associated multicast service area.
multiple terminals (UE/MS) in the associated broadcast service area/cell area. The transmitted data can be text to light
multimedia services (Audio, Video etc). On the other hand multicast mode is a unidirectional point-to-multipoint service
in which data is transmitted from a single source to a pre-defined multicast group of users that are subscribed to the
specific multicast service and have joined the multicast group in the associated multicast service area.
The following figure shows the reference architecture of MBMS service in UMTS network.
Figure 1.
MBMS Reference Architecture in UMTS network.
../../../GRAPHICS/Production/System_Enhanced_Feature/MBMS_Reference_v1.wmf
MBMS is able to use NPU assisted MBMS data flow processing on ASR 5000s so that system can relieve the Session
Manager to provide better performance and processing. Currently with NPU assisted data processing ASR 5000 can
support 225 SGSNs per MBMS Bearer Service for downlink of MBMS data.
Manager to provide better performance and processing. Currently with NPU assisted data processing ASR 5000 can
support 225 SGSNs per MBMS Bearer Service for downlink of MBMS data.
This enhancement is not applicable to ST16 platforms and a maximum of 15 downlink SGSNs per MBMS Bearer
service are supported.
service are supported.