introduction to ims (ims-01) ip media servers in ims: mrf and mrfp garland sharratt vp partner...
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Introduction to IMS (IMS-01)
IP Media Servers in IMS: MRF and MRFP
Garland SharrattVP Partner Development
& Chief [email protected]
Carrier Class IP Media Servers
CMS-1000 Media Server
CMS-6000 Media Server
Legacy TDM Network
Services – Traditional Approach
Services typically tied to access network Each new service required the provisioning of new hardware and
software Hardware and software was sold as a “service node” by one
vendor, typically a proprietary solution deployed as a silo Service node approach was necessary in 90's but in retrospect
resulted in lots of infrastructure duplication and associated capex/opex cost
ProprietaryProprietary
SUN Card + DSP Cards
+ TDM Interface CardsEmbedded in a
Compact PCIChassis
Proprietary, MonolithicSystem with software and Media processing
hardware
SUN Workstation withPCI DSP and TDM boards
Proprietary Audio Bridge
Conferencing Software
NT Server+ ASR Software
+ PCI DSP +TDM Boards
OS2 Based PC
TDM and DSP Boards in VME
Chassis
Conferencing Service Node
VoicemailService Node
MSC (announcements)
Mobility (Find Me)Services Node
Prepaid/RechargeService Node
Speech PortalService Node
Services – Decomposed Approach
Services are introduced and delivered through a software defined network
Service composed from best of breed software and media processing hardware
Open standards interfaces Service logic executes on
off-the-shelf servers Media processing
hardware is shared by many services
Conferencing Software
Messaging Software
Class 5 SoftswitchSoftware
MobilitySoftware
Prepaid/RechargeSoftware
Speech PortalSoftware
Media Gateway
IP/MPLSBackbone
IP Media Server
Legacy TDM Networks
Sessioncontrol
Com
mon
In
frastru
ctu
re
Transport Layer - IP/MPLS(routing/switching)
Traffic Processing Layer (inspect, process, adapt, convert,…)
MediaGateway
Session BorderController
Media Server
Signaling LayerBasic voice services
Enhanced multimedia services
layer
(mobile) VoiceSoftswitch
Voicemail IP CentrexIP PBX
Call Center
Conferencing
CollaborationRingback
Videomail
Calling Card Push to Talk
Speech PortalHosted Services
Network Gaming
Application Server
Layered Architecture for Services
Application
Servers
Legacy Wireless(PLMN,
2G/2.5G)
IP Wireless(3G, WiFi, WiMax)
Con
trol
Layer
Tra
nsp
ort
&En
dp
oin
t Layer
Legacy Wireline(PSTN)
IP Wireline(DSL,Cable
)
Serv
ices
Layer
SCIM
MGCF
HSS
ASASAS
RNC
Call StateControl Function
Mp (SIP, NETANN, VoiceXML, MSML)
Internet/Intranet
GGSNMb
(RTP)
IP Multimedia Subsystem
Mb (RTP)
MGW MRFP
Mb (RTP)
SGSN
Multimedia Resource Function
Controller
MediaGateway
Media GatewayControl
Function
Home Subscriber Service
Multimedia Resource
Function Processor
Mb (RTP)
IMS Architecture - Media Processing
CSCF
MRFC
Multimedia
Resource Function
Service Building Blocks
S-CSCF
AS
MRB
MRF/MRFP
SIP
SIP
SIP/H.248
Multimedia Resource Function (Processor)
SIP
Application Server
Media Resource Broker
Service Specific LogicService Specific Logic
Service Managementand Provisioning
Service Managementand Provisioning
Call SignalingCall Signaling
Service DatabasesService Databases
Billing InterfaceBilling Interface
Service CreationService Creation
Audio Tones & AnnouncementsAudio Tones & Announcements
DTMF Detection& Generation
DTMF Detection& Generation
Audio Bridging& Mixing
Audio Bridging& Mixing
Audio Recording & Playback
Audio Recording & Playback
SpeechRecognition
SpeechRecognition Text to SpeechText to Speech
VideoAnnouncements
VideoAnnouncements
Video Bridging& mixing
Video Bridging& mixing
Video Recording & Playback
Video Recording & Playback
Fax Detection& ProcessingFax Detection& Processing
Hot WordSpotting
Hot WordSpotting
Video SwitchingVideo Switching
MRF selection/virtualization
MRF selection/virtualization
SIP
RTP
Video Transcoding
Video Transcoding
AudioTranscoding
AudioTranscoding
Video EnhancedProcessing
Video EnhancedProcessing CodecsCodecs
Media Processing Chain
S-CSCF
AS
MRFC
MRFP
SIP
SIP
SIP
SIP UAProtocol conversion(Call Detail Records)
Media processing
H.248
MRB MRF selection/virtualization
SIP
Service logic, signaling
MRF
Media Server Control Protocols
S-CSCF/"Softswitch"
AS
MRFC
MRFP
SIP
SIP
SIP
SIP UAProtocol conversion(Call Detail Records)
Media processing
H.248
MRB MRF selection/virtualization
Service logic, signaling
SIP
• Simple processing,e.g., PSTN Emulation
• "Mobile softswitch" use
SIP + Netann + XML (e.g., MSML/MOML)
MRF
• Complex processing,e.g., enhanced services
• Application server use• "Mobile softswitch" use
Summary
IMS is decomposed into functional components, IP media server is a key reusable IMS component Media servers offer building blocks Two media server control options
MRFP -- H.248 interface• Simple processing
MRF -- SIP interface• Enhanced processing