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3G Wireless End-to-End IP
Multimedia System(Wireless All-IP Network)
February 28, 2001
Anne Y. LeeDistinguished Member of Technical Staff
Wireless Systems [email protected]
(630)713-1257http://nwswww.ih.lucent.com/~wirlss/voip/voip.html
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Whatis Wireless End-to-End IP Multimedia?
WhyWireless End-to-End IP Multimedia?
HowWireless End-to-End IP Multimedia?Standards Orgs & Status
Project Timeline
3GPP R5 Reference Model
Services Platforms
Radio Access Network
Network Diagram
Lucent Platforms & Reference Model Nodes
Call Flows
Performance, Security & Other Issues
Conclusion
Presentation Outline
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What is Wireless End-to-End IP Multimedia?
Wireless All-IP is:IP terminated at handsetAll packet, including voice
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New Services Single handset (PDA)
Integrated simultaneous packet voice and multimedia data
Single state machine for packet voice and multimedia
Access independent end user applications & interface
Single packet core network Circuit MSC eliminated
Simplified administration
Consolidated resources (cost savings)
Signalling/bearer path independence i.e. home control Same feature set wherever subscriber roams
Faster feature introduction with home control
Option to find least cost bearer path
Why Wireless End-to-End IP Multimedia?
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Why Wireless IP Multimedia ...? contd.
Single IP multimedia core network for wireline and wireless Shared feature servers and registrars with wireline service.
Merge of wireline and wireless end user services.
New internet-based features, e.g. call no answer treatments include
reply with customized html page.New multiple registrations or multiple contacts SIP features
for wireline andwireless devices for a single end user.Example: a. terminating call request arrives for subscriber
b. SIP server tries mobile
c. no answer
d. SIP server tries wireline phonee. no answer
f. SIP server sends customized html page to calling party
Ride internet technology curve
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Videotelephony Honey, is this what you want? Grandma, babys starting to walk!
Baby sitter monitor
Child/Elderly person monitor w/auto answer
capability
Integrated simultaneous voice and multimedia Help, Im lost
Multiple voice line appearances
We are buying a new house
Multimedia messaging (enhanced SMS)
All-IP Services Scenarios Examples
These are mass market usage scenario ideas. Can you think of
more? What are possible business uses?
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How Wireless End-to-End IP Multimedia?
Standards Orgs & StatusProject Timeline3GPP R5 Reference ModelServices PlatformsRadio Access NetworkNetwork DiagramLucent Platforms & Reference Model Nodes
Call FlowsPerformance, Security, & Other Issues
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3GPP
3GPP2
3GIP MWIF
IETF
ITU
Standards Organizations
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3GPP Wireless All-IP Standards Timeframe
3GPP Release 2000
December 2000
3GPP Release 4
March, 2001 Stage 2 for IP Multimedia
Subsystem
RAN Aspects
Long Development Lead time
Aspects
3GPP Release 5
December, 2001 Completion of stage 3 for IP
Multimedia Subsystem
Standardization began in ~98/99
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All IP Ad Hoc Group under TSG-S chartered in Nov. 1999 (moved directlyunder 3GPP2 Steering Committee Feb. 2000)Requirements for a 3G Network Based on Internet Protocol (All-IP)with Support for TIA/EIA-41 Interoperability version 1.0, October 2000
IP Network Architecture Model for CDMA2000 Spread SpectrumSystems version 1.0, October 2000
Workplan Recommendations for the 3GPP2 All IP Network DevelopmentActivitiesversion 1.0, October 2000
Use existing TSG structure for Specification DevelopmentWork divided across TSG-A, TSG-C, TSG-N, TSG-P with an All-IP ProjectGroup within TSG-S
Begin work Jan. 2001, with approximately a 12-month development cycle.
3GPP2 All IP Network Standards Status
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FOA
2Q034Q00now
Overarching FDDVersion 1 Baselined
Gate 2
2Q01
Gate 3
4Q01
Stds
Baseline
Assumes 3GPP Standards makes its
target baseline date.
Tentative Project Timeline
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Overarching FDD Version 1.0 Schedule
Milestone Date
1stDraft / Authors Review November 15, 16, 17 2000
Chalktalk December 6, 7, 2000
2
ndDraft / Authors Review
January 4, 5, 2001Walkthru January 17, 18, 2001
Formal Review February 5, 6, 7, 2001
Baseline March 31, 2001
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Reference Model
TE MTBSS
GERAN
SGSN GGSN
CSCF MGCF
MRF MGW*
T-SGW
CSCF
HSS
R-SGW
PSTN / Legac y/
External
Legacy Mobile
Signaling Network
EIR
IP Mult imedia
Domain *
R UmIu
Gn
Gf
CAP
Gi Gi
Gi
Gi
Mr
Cx
Mh
MgMm
Mw
Mc
Gc
Gr
Ms
Appl icat ions &Services
SCP
* Indicates Identical ElementsSignaling LinkSignaling and Data Link
Access Network Elements
Access Equipment
Core Network Elements
TE MT UTRANR Uu
MGW*Iu
Iu
Nb
IP Mult imedia
Domain *
Terminal Equipment (TE)
Not necessarily a wireless device
Used in conjunction with wireless
device
Example : laptop, PDA
Interfaces:
MT via R
Mobile Terminal (MT)
A wireless device
Possibly used in conjunction with
TE to access wireless services
Example : Mobile Phone
Interfaces:
MT via R
GERAN via Um
UMTS Radio Access Network (UTRAN)
Primary Interface between Wireless
device and Access Network
Designed to support both 2G and 3G
air interfaces.
Interfaces:
SGSN via Iu
MT via UuMGW via Iu
Serving GPRS Service Node(SGSN)
Primary point of attachment to
packet data network
Performs mobility management of
packet data mobiles
Authentication
Accounting
Maintains mobile state information
Interfaces:
GERAN via Gb
GGSN via Um
HSS via Iu
Services via CAP
Gateway GPRS Service Node(GGSN)
Interworking between SGSN and
external packet data network
Routing of packets
Packet Session Establishment
Accounting
Interfaces:
SGSN via Gn
CSCF via Gi
HSS via Gc
MRF via Gi
MGW via Gi
IP MM via Gi
Call Session Control Function (CSCF)
Incoming Call Gateway function
Call Control function
Serving Profile Database function,
Address Handling function.
Interfaces:
CSCF via Mw
R-SGW via MsIP MM CN via Mm
MGCF via Mg
GGSN via Gi
HSS via Cx
MRF via Mr
Services via VHE, OSA
Home Subscriber System (HSS)
Analogous to HLRContain Authentication information
Contain Information about serving
CSCF
Subscriber profile/subscription
information
Interfaces:CSCF via Cx
R-SGW via Mh
GGSN via Gc
SGSN via Gr
Services via VHE, OSA
Transport Signaling Gateway (T-SGW)
Terminates signaling fromPSTN/PLMN
Translates messages from MGCF to
PSTN
Interfaces:
PSTN via
MGCF via
Media Gateway (MGW)
Terminates transport from IPNetwork
Terminates transport from PSTN
Vocoders might be needed here
Interfaces:
GGSN via Gi
MGW via Nh
PSTN via
Media Gateway Control Function (MGCF)
Interwork with legacy networks forsignalling
Control of MGW
Signalling to CSCF for call control
Interfaces:
CSCF via Mg
MGW via Mc
T-SGW via
Roaming Signaling Gateway (R-SGW)
Allows for roaming between2G/CS domain
Provides interworking between SS7
and IP transport
Interfaces:
Legacy via
CSCF via Ms
HSS via Mh
Media Resource Function (MRF)
Provides support for multi-partyconferences
Bearer control between GGSN and
MGW for multimedia conferences
Tones and announcements
Interfaces:
CSCF via MrGGSN via Gi
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Reference Model - new network entity
BGCFS-CSCF
MGCF
MGW
a
b
H.248+
Breakout gatewaycontrol function
BGCF
Home Network
Visited Network
MGCF
MGW
b
H.248+
c
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Services Platforms
Open Services Access (OSA)SIPCAMEL (3GPP), WIN (3GPP2)
CSCF
Third Party (including VisitedNetwork local & location-based
services)
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Radio Access Network (RAN) contd.
IP Header Compression/Removal Compression specifications exists for 3GPP R99 for IP/TCP non-real time services
Removal and compression specifications (in 3GPP R4/R5) for IP/UDP/RTP headers in realtime services
Support for Simultaneous Multiple Radio Access Bearer Combinations, forexample:
ConversationalRAB + SignallingRAB with high traffic handling priority ConversationalRAB + SignallingRAB with high traffic handling priority +Interactive
RABs with high traffic handling priority
ConversationalRAB + SignallingRAB with high traffic handling priority +BackgroundRABs and/orInteractiveRABs with low traffic handling priority
ConversationalRAB + SignallingRAB with high traffic handling priority +InteractiveRABs with high traffic handling priority +BackgroundRABs and/orInteractiveRABs with
low traffic handling priority
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Network Diagram
Home IP Network
Visited IP Network
HSS
P-CSCF/MGCF
CS-MGW
S-CSCF/BGCF/MGCF
SGSN
GGSN
DHCP/DNS+
To SS7 network...
To PSTN phone...
IP router
To landline IP phone...
SS7
To IP mobile...
To circuit mobile...
RAN(RNC + BTS)
IP Mobile
R-SGW
I-CSCF/T-SGW
To PSTN...To 2G wireless network...
PS-MGW
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Network Subsystems
RAN
Backbone
Packet
Network
IP Multimedia
Core Network
Radio Access Network
UTRAN
GERAN
Backbone Packet Network
SGSN, GGSN, CGF, G-HLR
IP Multimedia Core Network
CSCF, MGW, MGCF, BGCF, MRF, R-
SGW, T-SGW, HSS/AAA
Services
Services
OSA (JAIN/PARLAY)
SIP
CAMEL
WIN
CSCF
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Lucent Platforms & Reference Model Nodes
Lucent Softswitch (LSS)
S-CSCF, P-CSCF, I-CSCF*
T-SGW**
R-SGW**
BGCF**
MGCF**
Super HLR / E-services HLR? HSS/AAA*
Lucent FMS / Springtide
3G SGSN/GGSN**
Lucent FMS
Charging GW** OMC**
QIP
DNS (ENUM)**
DHCP
Lucent Media Server (LMS)
MRF**
APX8000
CS-MGW**
PS-MGW**
OneBTS/RNC/BSC
UTRAN** GERAN**
PacketIN?
Application Server (for advance
services)
* new
** enhanced from UMTS R4 circuit and packet
networks and/or CoreIP
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Call Flows - Registration
Initial RegistrationRe-registration
De-registrationAdvanced Registration
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Call Flows - Registration Flow Example
Home
IP Network
Visited
IP Network
S-CSCF
P-CSCF
RANSGSN
GGSN
I-CSCF
DNS/DHCP+
HSS
IP Mobile Registration
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Call Flows - Advanced Registration
Multiple users, one devicemultiple aliases per user per device
Multiple identifiers, one devicemultiple users per device
Multiple contactsmultiple contacts per user (future)
3rd party registrationuser registers another user (future)
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Call Flows - Origination
IP mobile to PSTN phoneIP mobile to IP landline phone
IP mobile to circuit mobileIP mobile to IP mobile
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Call Flows - Origination Flow Example
Home IP Network
Visited IP Network
PSTN
S-CSCF
MGW
T-SGW
SS7
I-CSCF
P-CSCF
RANSGSN
MGCF
I-CSCF
DNS/DHCP+
GGSN
IP Mobile to PSTN Phone
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Call Flows - Termination
PSTN phone to IP mobileIP landline phone to IP mobile
Circuit mobile to IP mobileIP mobile to IP mobile
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Call Flows - Mobile to Mobile
With vocoder bypass (tandem free)With transcoderThrough PSTN
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Call Flows - Mobile to Mobile Flow Example
Home IP Network
(called party)
HSS
router
RAN
SGSN
Home IP Network
(calling party)
router
RAN
SGSN
P-CSCF
I-CSCF S-CSCFS-CSCF
DNS/DHCP+
P-CSCF
GGSN GGSN
Mobile to Mobile with Vocoder Bypass
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Call Flows - Multimedia
Mobile to mobileMobile to server (e.g. conferencebridge, games, etc.)
Mobile to IP landline terminal (e.g.United Airlines attendant, hotel desk clerk,
baby sitter monitor, etc.)
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Call Flows - Multimedia Flow Example
IM Core Network
P-CSCF
S-CSCF
I-CSCFHSS
UEB
UEb
Access Network
PS-MGW
Access NetworkPS-MGW
IM Core Network
P-CSCFS-CSCF
I-CSCF HSS
packet voice session in progressSGSNGGSN
SGSNGGSN
Invite(add new SDP)
QoS authorizationQoS authorization
QoS AllocationQoS Allocation
Second bearer for existing session
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Performance, Security, & Other Issues
PerformanceQoSSecurityAccounting and BillingEmergency ServicesLegal InterceptIPv6
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Quality of Service
Session Description negotiation/SDP
QoS policy control/resource authorization
Call flow and bearer setup interactions
IP bearer services/resource reservations
Bearer establishment for multimedia services
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Security
User Authentication
Network Peer-to-Peer Authentication
I-CSCF Firewall
Privacy/encryption
Integrity
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Accounting/Billing
Radio and Backbone Resources
IP Multimedia Core Network
External IP Network Resources
Public Switched Telephone Network (PSTN)
Pre-paid Accounts
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Conclusion
High speed wireless packet data will enable newways for people to communicate.
It is critical to Lucents future that Lucent workaggressively on developing the enablingarchitecture that will revolutionizewireless
communications.
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Acronyms
3GPP: 3rd generation partnership project
BGCF: breakout gateway control function BTS: base tranceiver system
CN: core network
CSCF: call session control function
DHCP: dynamic host control protocol
DNS: domain name server
FW: framework
GGSN: gateway GPRS support node
HSS: home subscriber system
I-CSCF: interrogating CSCF]
IM: IP multimedia
IM CN: IP multimedia core network JAIN: Java applets for intelligent networks
MGCF: media gateway control function
MGW: media gateway
MRF: media resource function MT: mobile terminal
OSA: open services architecture
PCN: packet core network
P-CSCF: proxy CSCF
RAN: radio access network
RNC: radio network controller
R-SGW: roaming signalling gateway
SCS: service capability server
S-CSCF: serving CSCF
SGSN: serving GPRS support node
SIP: session initiation protocol TE: terminal equipment
T-SGW: transport signalling gateway