Cisco Cisco Packet Data Gateway (PDG) Guia De Resolução De Problemas
Multimedia Broadcast and Multicast Service
▀ Introduction
▄ Cisco ASR 5000 Series Enhanced Feature Configuration Guide
OL-22982-01
Introduction
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 with a suitable method for mass communications.
MBMS functionality on the system is provided by an existing GGSN service and is enabled by a valid services license.
The main features supported by the Multimedia Broadcast & Multicast Services are:
Individual user network control functions and provide forward MBMS user data to SGSN
Important:
The ASR 5000 platform supports 225 downlink SGSNs per MBMS Bearer
Service through NPU assisted data flow processing. NPU assisted data processing is available on
ASR 5000 platforms with release 8.1 or later only.
ASR 5000 platforms with release 8.1 or later only.
Support for intra-GGSN and inter-GGSN mobility procedures
Generate charging data per multicast service for each user for both prepaid and post paid subscribers.
Multicast proxy-host functionality
Support for MBMS-specific Gmb messages
Authentication of MBMS flow-ids using a MBMS controller
Establishment and teardown of MBMS bearer paths using the multicast framework
Support for framing HDLC-like and segment based framing
Accounting for the MBMS flows to charge the originator of the content
This service 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.