IP Solution Architectures for Deploying Video Services (SP-08)

1
Carrier Class IP Media Servers
CMS-1000 Media Server

• IP Solution Architectures for Deploying Video
  Services (SP-08)
• IP Media Servers for Multimedia
• Garland Sharratt
• VP Partner Development Chief Architect
• gsharratt_at_convedia.com

CMS-6000 Media Server
2
Agenda

• Presentation 35 minutes
• Why use media servers
• Multimedia services
• Media processing
• Architectures
• Why decompose / layer
• NGN architecture
• H3323 MCU / non-decomposed
• IMS architecture
• Service building blocks
• Building Blocks
• Play/Record Transcoding
• Conf. - Continuous Presence
• Conf. - Voice Activated Switch'g
• 3G-324M - two models

• Video service delivery platform
• Multimedia file gateway
• Controlling media servers
• IMS media processing chain
• Control protocols
• SIP compared to H.248
• Example call flow
• Using a MS for enhanced video conferencing
• QA 10 minutes

3
Multimedia Services x Media Processing

• Multimedia Services
• Video announcements for greetings, branding,
  advertisements, ...
• Video information portal
• Video auto-attendant
• Video call center
• Video messaging, videomail
• Video ringback tones
• Video conferencing
• Video network gaming

• Multimedia Building Blocks
• Play
• Record
• DTMF
• Conferencing Switching
• Conferencing Mixing
• Titles, Borders, Cropping, ...
• (Transcoding, Rate matching)

4
Services Traditional Approach
Conferencing Service Node
Voicemail Service Node
Video Conferencing
Mobility (Find Me) Services Node
Prepaid/Recharge Service Node
Speech Portal Service Node
SUN Card DSP Cards TDM Interface
Cards Embedded in a Compact PCI Chassis
Proprietary, MonolithicSystem with software and
Media processing hardware, e.g., MCU
Conferencing Software
NT Server ASR Software PCI DSP TDM Boards
OS2 Based PC
SUN Workstation with PCI DSP and TDM boards
Proprietary
Proprietary
Proprietary Audio Bridge
TDM and DSP Boards in VME Chassis
Legacy TDM Network

• 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

5
Services Decomposed Approach
Conferencing Software
Messaging Software
Class 5 Softswitch Software
MobilitySoftware
Speech PortalSoftware
Prepaid/RechargeSoftware

• 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

Common Infrastructure
IP Media Server
IP/MPLSBackbone
Sessioncontrol
Media Gateway
Legacy TDM Networks
6
Layered Architecture for Services
Conferencing
Videomail
Voicemail
IP Centrex
IP PBX
Calling Card
Push to Talk
Hosted Services
Application Server
Call Center
Speech Portal
Ringback
Network Gaming
Collaboration
Enhanced multimedia services layer
(mobile) VoiceSoftswitch
Signaling Layer Basic voice services
Session Border Controller
Media Server
MediaGateway
Traffic Processing Layer (inspect, process,
adapt, convert,)
Transport Layer - IP/MPLS (routing/switching)
7
NGN Generic Architecture
IP Service Core
SIP, H.323, MGCP, MEGACO
IP Access
SS7
"Softswitch"
Application Servers
IP Phone
PSTN Access
SIP, H.323
Speech Server
Phone
SIP/VoiceXML, MSML/MOML MGCP, MEGACO
PDA/3G Phone
MRCP
MGCP, MEGACO
Content Storage
HTTP,NFS
Cell Phone
PC
TDM
RTP
RTP
Media Gateway
RTP
Media Server
RTP
Peer Network
Session Border Controller
8
Non-Decomposed Architecture
IP Service Core
H.323
IP Access
"Softswitch"/Gatekeeper
SS7
IP Phone
PSTN Access
Phone
H.323
PDA/3G Phone
MGCP, MEGACO
Cell Phone
PC
TDM
RTP
RTP
Media Gateway
RTP
H.323 MCU
RTP
Peer Network
Session Border Controller
9
IMS Architecture
IP Multimedia Subsystem
Services Layer
AS
AS
AS
ApplicationServers
SCIM
Call StateControl Function
Home Subscriber Service
Control Layer
HSS
Multimedia Resource Function Controller
Media GatewayControl Function
Multimedia Resource Function
Multimedia ResourceFunction Processor
Transport Endpoint Layer
MediaGateway
Internet/Intranet
IP Wireless(3G, WiFi, WiMax)
Legacy Wireless(PLMN, 2G/2.5G)
Legacy Wireline(PSTN)
IP Wireline(DSL,Cable)
10
Service Building Blocks
Application Server
AS
Service Specific Logic
Call Signaling
Billing Interface
SIP
SIP
Service Managementand Provisioning
Service Databases
Service Creation
SIP
S-CSCF
SIP
Media Resource Broker
MRB
MRF selection/virtualization
SIP/ H.248
Multimedia Resource Function (Processor)
Audio Tones Announcements
DTMF Detection Generation
Audio Bridging Mixing
Audio Recording Playback
SpeechRecognition
Text to Speech
Fax Detection Processing
Hot Word Spotting
MRF/MRFP
RTP
Video Announcements
Video Bridging mixing
Video Recording Playback
Video Switching
Video Transcoding
Video EnhancedProcessing
AV Codecs
Audio Transcoding
11
Play/Record Transcoding
Play / Record
Audio G.711
Audio AAC
Video H.263
Video MPEG4
RTP
NFS/HTTP
Content Storage
Media Server
Transcoding
Audio G.711
Audio AAC
Video H.263
Video MPEG4
RTP
RTP
Media Server
12
Conferencing - Continuous Presence

• Supports participants with
• Different codecs (transcoding)
• Different bit rates, frame rates, screen sizes
  (rate matching)

13
Conferencing - Voice Activated Switching
Application Server
RTP
RTP
Previous speaker
Current speaker
Everyone sees current speaker. Option current
speaker sees previous speaker
RTP
RTP
Codec, rate, fps, bit rate must match Terminals
must support I-Frame requests
14
3G-324M in Gateway
Application Server
324M processing
SIP (signaling)
SIP (control)
SIP
PLMN
IP/IMS
RTP
PRI/BRI/ISUP
SIP / 324MGateway
RTP
SIP
Mobile phonewith 324M
Regular RTP processing
Example Dilithium Networks DTG 2000
Convedia Media Server
15
3G-324M in Media Server
Application Server
Transparent pass-through
SIP (signaling)
SIP (control)
PLMN
IP/IMS
PRI/BRI/ISUP
AnyGateway
SIP
64k
SIP
Mobile phonewith 324M
324M processing
Example Dilithium Networks DTG 2000
Convedia Media Server
16
Video Service Delivery Platform
Application Server
SIP
Multimedia content sources
File
File
Multimedia File Gateway
File
File
Terminal
File server (video/audio file storage)
e.g., web server for PC access to files, or MMS
gateway for mobile phone access to files
Wireline or wireless
SIP / H.248
File
Media Gateway
CS terminal
TDM
RTP
Media Server
Wireline or wireless
RTP
IP terminal
Wireline or wireless
17
Media Processing Chain
AS
Service logic, signaling
SIP
SIP
SIP
SIP
S-CSCF
MRB
MRF selection/virtualization
SIP
SIP UA Protocol conversion (Call Detail Records)
MRFC
H.248
MRF
RTP
MRFP
Media processing
18
Media Server Control Protocols
AS
Service logic, signaling
SIP
S-CSCF/ "Softswitch"
SIP
SIP
MRB
MRF selection/virtualization
SIP
SIP UA Protocol conversion (Call Detail Records)
MRFC
SIP Netann XML (e.g., MSML/MOML)
H.248
MRFP
MRF
Media processing

• Simple processing,e.g., PSTN Emulation
• "Mobile softswitch" use

• Complex processing,e.g., enhanced services
• Application server use
• "Mobile softswitch" use

19
SIP or H.248 for Media Server Control

• SIP gt H.248
• Application servers already have SIP stack for
  signaling, have no use for H.248
• Powerful SIP service creation capabilities
  VoiceXML, proxies, routing, security, etc.
• SIP skills and tools more widespread than H.248
  skills and tools
• Many service providers want to simplify networks,
  reduce number of protocols
• SIP is only common protocol for MS control
  between all NGN architectures
• H.248 gt SIP
• Currently ahead in standardization due to reusing
  MG specification work

Application Server(s)
Signaling
SIP or H.248???
IP Network
RTP
IP Media Server
20
Call Flow Example Enhanced Video Conf.
21
Summary

• Multimedia services need media processing
• IMS is decomposed into functional components
• 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
• Media server gt H.323 MCU