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8/7/2019 3rd Generation Mobile Services-Luis Galindo
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TELEFONICA MOVILES ESPAA
3rd Generation Mobile Services:Introduction to IMS (IP
Multimedia Subsystem) andMBMS(Multimedia
Broadcast/Multicast Service)Luis Angel Galindo
martes, 21 de octubre de 2003
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CONTENT
IMS
MBMS
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The answer to life's problems aren't at thebottom of a bottle, they're on TV!
Homer Simpson
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MBMS
IMS
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RNC
UTRAN
SGSN
GGSNGnGn
PacketPacketSwitchedSwitchedDomainDomain
HSSIupsIups
GrGrGcGc
DD
IucsIucs
GiGi PDNIP networks/Internet
UMTS Release 5 and 6 architectureUMTS Release 5 and 6 architecture
PSTN/
Legacy/
PLMNData
EIRCC
Gf Gf
FFGsGs
MSCserver
MGW
McMc CircuitCircuit
SwitchedSwitchedDomainDomain
T-SGW
H.248
GMSCserver
MGW
McMcH.248
Data and Signalling Interface
Signalling InterfaceData Interface
NbNb
NcNc
Voice and Data over CS
MGCFCSCFMRF
GiGi
MrMr
CxCx IM-MGW
MgMgMcMc
T-SGW
GiGi
IMSIMS DomainDomain
GiGi
H.248
SIP
MmMm
ServicePlatforms
Voiceover IP
BICCSS7/IP
SIP
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MGCF
MRF
GiGi
MrMrCxCx
IM-MGW
MgMg
McMc
GoGoGiGi
IP Multimedia/Internet
H.248
SIP
MmMm
IMS architectureIMS architecture
PSTN/
Legacy/PLMN
CSCF BGCF
BGCF
GGSN
HSS
MwMw
CSCF
MjMj
Mk Mk MiMi
SIP
SIPSIP
SIP
SIP
SIP
Diameter
P-CSCF
MwMw
COPS
Data and Signalling Interface
Signalling InterfaceData Interface
First contact point for the user within IMS Acts as a proxy Forward the SIP register message request received from
the UE to an I-CSCF Performs the authorisation of the use of bearer resources
and QoS management
Generation of CDRs
Is the contact point within an operators network for allconnections destined to a subscriber of thatnetwork operator or a roamer registered in the networkof that operator
Assigns a S-CSCF to a user during SIP registration Obtain from HSS the address of the S-CSCF Route a SIP request received from another networktowards the S-CSCF
Generation of CDRs Hides the network topology of an operator (THIG)
Performs the session control for the user. Maintains asession state for support of services
May behave as a register Interacts with service platforms for the support of services
Obtains the address of the I-CSCF for the networkoperator serving the destination subscriber
Generation of CDRs
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Quality of Service negotiation
Session set-up
In an established session
IMS sessions will support several IP multimedia applicationsindependently of who implements them
Voice calls between IMS users and circuit switched usersmust be transparent for the user
Simplicity in the access to multimedia applications in real
time Use of SIP for signalling
IMS performs the multimedia flows synchronisation
Main characteristic of IMS (I)Main characteristic of IMS (I)
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Voice and data integration in the packet switching domain
Use of SIP URL addresses(yo@tsm.es)
Access to the pre-selected services by the user independently
of the network where the user is located
VHE
IMS provides authorisation, authentication, security and
privacy
IMS provides charging based in amount of data, in duration,in the service or a combination of them
Main characteristic of IMS (II)Main characteristic of IMS (II)
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P-CSCF
SIP
I-CSCFI-CSCF
P-CSCF
S-CSCF
S-CSCF
HSS
4
SIP
7
9
1
Session set-upSIP (voice+ video) toGiovanni@ericsson.it
2
Which is the operator for ericsson.se?
All-IP client inroamingIngber@ericsson.se
All-IP clientGiovanni@ericsson.it
Performs the analysis of the destination, provides
the service
10
Session is establishedwith Giovanni
HSSWhat S-CSCF is serving
Ingber@ericsson.se?
3
5
Which is the operator for ericsson.it?
Where isGiovanni?
8
6
What S-CSCF is servingGiovanni@ericsson.it?
Example of session setExample of session set --upup
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IMS
MBMS
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RANRAN
MBMS (MBMS ( Broadcast ModeBroadcast Mode ))
Music/MovieStreaming
MultimediaServices
IP Network/Internet
Life webcasting
TV/NewsSportAdvertising
BroadcastBroadcast DataDatastreamstream
Operator Operator SpecificSpecificServicesServices
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IP Network/InternetRANRAN
MBMS (MBMS ( Multicast ModeMulticast Mode ))
Music/MovieStreaming
MultimediaServices
Life webcasting
TV/NewsSportAdvertising
Service SynchronisationService Synchronisation
MulticastMulticast DataDatastreamstream
UserUser --initiated activationinitiated activation
Operator Operator SpecificSpecificServicesServices
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RNC
UTRAN
SGSN
GGSNGnGn
Packet SwitchedPacket SwitchedDomainDomain
HLR IuIu
GrGr
UTRANUTRAN
BGGiGiGiGi
PDN/Internet
BMSC
GiGi
Broadcast/ MulticastBroadcast/ MulticastSourceSource
GiGi
GiGi
Content ProviderContent Provider
GmbGmb
CBCCBC
CSECSE
Broadcast/ MulticastBroadcast/ MulticastSourceSource
Content ProviderContent Provider
OSAOSASCSSCS
Architecture andArchitecture and interfacesinterfaces
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CharacteristicsCharacteristics of of MBMS (I)MBMS (I)
Uses the UMTS packet switching core IP is mandatory
Point-to-multipoint transmissionBoth unicast and multicast sources are supported
Use of IPv6 is advisable
Multicast mode shall be interoperable with IETF IP MulticastQoS
Configurable for individual services Streaming and background classes
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Data types Text, audio, picture, video
Handovers and roaming are supportedAdaptation of data transmission to different RAN capabilitiesor radio resources availableUser can receive simultaneously more than one MBMS service
CharacteristicsCharacteristics of of MBMS (II)MBMS (II)
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Operation ModesOperation Modes (I)(I)
Broadcast Transmission of multimedia data to all users in a broadcast
service area
User subscription to this mode is not required But in order to receive the multimedia data , user must have
enabled the specific broadcast service locally on theirmobile terminal
In this mode, charging data will not be generated, thus thereception of the traffic is not guaranteed.
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Operation ModesOperation Modes (II)(II)
Multicast Transmission of multimedia data to a multicast group in a
multicast service area. It is possible to transmit selectively
within the multicast service area.
User subscription to the multicast subscription groups isrequired. This can be made by the operator, the user or athird party.
One user can be joined to several multicast groups at thesame time
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Multicast Service ProvisionMulticast Service Provision
Subscription
Service announcement
Joining
Session start
MBMS notification
Data transfer
Session stopLeaving
Agreement betweenuser and operator
User is informed about the rangeof MBMS services available
(CBS, URL, Push)
User: Id like to be a member.
Id like to receive data
Start of a multicast session(network resources established)
Network: Multicast data transferis ready
Network resources are released
User: I no longer want to receivedata of this service
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Broadcast Service ProvisionBroadcast Service Provision
Service announcement
Session start
MBMS notification
Data transfer
Session stop
User is informed about the rangeof MBMS services available
(CBS, URL, Push)
Start of a multicast session
(network resources established)
Network: Broadcast data transferis ready
Network resources are released
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BroadcastBroadcast //multicast service areamulticast service area
Individual service area Radio cell
Service local area Zone where the service content is the same
Broadcast/multicast service area service local areas
One per serviceIts able to deliver different contents of the same service
Depending on the user location (e.g. Regional traffic news)
Configurable by third parties By connecting to BMSC
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SGSN 1
GGSN
GPRSGPRS backbonebackbone
IP
MulticastMulticastSourceSource
GTP Tunnel
SGSN 2GTP Tunnel
GTPTID=pt to multipoint GPRS
IP PacketDestination=IP target multicastIP PacketDestination=IP target multicastEncapsulateduser data
IP PacketDestination=SGSN address
GPRS transportprotocols
IPIP unicast on the Gn interfaceunicast on the Gn interface Routers deliver multicast packetsto all interfaces
registered toreceive them
Copies multicastpackets in GTP tunnels
to all SGSNswith user registered
Specific tunnelsfor multicast traffic
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GGSN
SGSN 1
GPRSGPRS backbonebackbone
IP
MulticastMulticastSourceSource
SGSN 2
IP PacketDestination=IP target multicast
IP PacketDest= Gn multicast address
GPRS transportprotocols
GTPTID=pt to multipoint GPRS
IP Packet
Destination=IP target multicast
Encapsulated
user data
IPIP multicast on the Gn interfacemulticast on the Gn interfaceRouters deliver
multicast packetsto all interfaces
registered toreceive them
Transmit multicastpacket on to a
single GTP tunnelfor that target
multicast addressDelivers multicast
packets to allinterfaces registered
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TSs of referenceTSs of reference
The access to all the information about these TecnnicalSpecifications is free in the web page www.3gpp.org
MBMS: TS 22.146 Multimedia Broadcast/Multicast Service
TS 23.246 Architecture and functional description
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If the world should blow itself up, the
last audible voice would be that of anexpert saying it can't be done
Peter Ustinov
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