implementing a testbed for mobile multimedia
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Implementing a Testbed for Mobile Multimedia
Authors: A.Dutta, J.C Chen, S. Das, M. Elaoud, D. Famolari,
S. Madhani, A McAuley, M. Tauil
Telcordia Technologies
S. Baba, T.Maeda, N. Nakajima, Y. Ohba
Toshiba America Research Inc.
Henning Schulzrinne
Columbia University
Presenter: Ashutosh Dutta
Globecom 2001 – 2Telcordia Technologies, TARI and Toshiba Internal Use Only
ITSUMO Project
Internet Technology Supporting Universal Mobile Operations
( Joint Research of Toshiba and Telcordia Technologies)
Globecom 2001 – 3Telcordia Technologies, TARI and Toshiba Internal Use Only
Outline
Motivation Architecture Components Protocol Galaxy Prototype/Signal Flows Demo (Internal & External)
Globecom 2001 – 4Telcordia Technologies, TARI and Toshiba Internal Use Only
Issue
–The New York Times (Aug. 23, 1999, “Multimedia Transmissions Drive Net Toward Gridlock”)
–Multimedia streaming is going to be a killer application for the Internet.
–Multimedia traffic is RTP/UDP based, applications include IP telephony Broadcasting multimedia content Multi-party conferences, collaborations Multi-player games
–We need a mobility management scheme for multi-media traffic in the wireless Internet
Globecom 2001 – 5Telcordia Technologies, TARI and Toshiba Internal Use Only
Motivation
To realize Wireless Internet Telephony and Mobile multimedia in an internal and external Test-bed to help deployment
Components– Signaling– Configuration– Binding - Session Continuity– Security - BURP/AAA– QoS– Media Delivery - Wireless Multicast– IP-PSTN
Globecom 2001 – 6Telcordia Technologies, TARI and Toshiba Internal Use Only
Internet Multimedia Protocol Stack
Media Transport
App
lica
tion
Dae
mon
Ker
nel
Phy
sica
lN
etw
ork
H.323 SIP RTSP RSVP RTCPRTP
TCP UDP
IPv4, IPv6, IP Multicast
PPP AAL3/4 AAL5 PPP
SONET ATM Ethernet V.34
Signaling Quality of Service media encaps(H.261. MPEG)
ICMP IGMP
SAP
802.11
DNSLDAP
MIP MIP variant
CIP
CDMA
SDP
MIPv6
MGCP
Globecom 2001 – 7Telcordia Technologies, TARI and Toshiba Internal Use Only
Service Profile for all IP wireless network user
ServicesRequirements
Multimedia Voice Data
Delay Stringent Stringent TolerantLoss/error Tolerant - Stringent Tolerant StringentBit rate (outdoor) Pedestrian 384 kb/s
Vehicular 144 kb/s
64 kb/s Pedestrian 384 kb/sVehicular 144 kb/s
Bit rate (indoor) 2 Mb/s 64kb/s 2Mb/sExampleapplications
Video streaming, videoconferencing
Mobile telephony File Transfer (e.g., ftp)to mobile
Globecom 2001 – 8Telcordia Technologies, TARI and Toshiba Internal Use Only
ITSUMO’s Principles
End-to-end wireless/wireline IP platform
Reduce wireless infrastructure cost
Global roaming
Enable seamless communication anywhere
Wireless “technology-independence”
Common middleware for any wireless interface
Support of real-time and non-real time multimedia services
using IP
Simplify implementation & reduce cost (e.g.VoIP)
Smooth/seamless interworking with PSTN and today’s mobile
telephony
Enable communication with existing network
Globecom 2001 – 9Telcordia Technologies, TARI and Toshiba Internal Use Only
The ITSUMO All-IP Network Architecture
MS: Mobile Station
BS: Base Station
ERC: Edge Router & Controller
Control messages (i.e..., signaling)
Domain Control Agent
Visited Network
Domain Control Agent
Wireline IP backbone network
Home Network
ERC
Internet
Regional IP network Regional IP
network
ERC
Inter-Domain Control Agent
Radio Access Network(RAN)
Radio Access Network(RAN)
BS
BSBS
BS
DCADCA
IDCA
MS
IP
Globecom 2001 – 10Telcordia Technologies, TARI and Toshiba Internal Use Only
Wireless Internet Roaming
SIP Server
AAAQ
SIP
HR
SIP Server
MAAAQ
VR
Internet
Visiting Network Home Network
BSC 1 BS
BS
ERC 1
BSC 2
BS
ERC 2
ERC 3
BS
BS BSC 3
A
C
B D
Home RegistrarVisiting Registrar
Corresponding HostSIP
DRCPDRCP
INVITE128.59.10.6
IPch
207.3.232.10
207.3.232.10207.3.240.10
SLA/SA
128.59.11.6
RTPTranslator
• SIP UA in mobiles and hosts.
SIP: Session Initiation ProtocolDCA: Domain Control AgentERC: Edge Router & ControllerMAAAQ: Mobility, AAA, Quality of Service
Globecom 2001 – 11Telcordia Technologies, TARI and Toshiba Internal Use Only
2G + 3G Wireless Access, Packet Switched Backbone
2GAccess
3GAccess
2GAccess
VLR HLRSS7
WG2
IP Network
TCAP, ISUP
A Interface
SIP
Call Agent SIP Server
MAAAQ
MGCP MGCP
WG2
3GAccess
SIP
Globecom 2001 – 12Telcordia Technologies, TARI and Toshiba Internal Use Only
Wireless Internet Telephony Test-bed Protocols
Functionality Protocols Details/Remarks/usageSignaling SIP/MGCP SIP was used for IP end-points.
MGCP was used with Call AgentConfiguration DRCP - aka
Fast(wireless)DHCP
Faster registration protocol forwireless roaming users - a variant offast DHCP
LocalAuthentication
BURP(Basic UserRegistrationProtocol)
User registration protocol similar toPPP is for dialup environment forroaming within a domain.
Inter-Domain(AAA)
Diameter SIP-AAA interaction before theregistration is successfulInter AAA interaction during domainhandoff
LocationManagement
SIP RegistrationDynamic DNS fornon SIP- sessions
Re-registration upon subnet changeAAA is involved only after it changesa domain.
QoS DSNP Dynamically allocates QoS during thesubnet handoff
Multicast PIM/DVMRPApplication layer (RTP/RTCP)
Localized Multicast applicationQoS experiments for MulticastapplicationIntra-domain mobility with fast-handoff
Binding SIP based mobilitymanagement forreal-timeapplication, MIPfor TCP based
Supports audio/video/white board aspart of mobility application.(indoor/outdoor)
Globecom 2001 – 13Telcordia Technologies, TARI and Toshiba Internal Use Only
DRCP (Dynamic Rapid Configuration Protocol) *1
– Light weight (i.e., short message length, less number of exchanging messages) network-node configuration protocol suitable for the wireless environment
SIP Mobility *1 – Mobility Management Framework that is realized at the message level of SIP
(IETF signaling protocol for VoIP) and fits well with the VoIP and Multimedia application
QoS Architecture *1
– Architecture based on Diffserv (Differentiated Service), that supports wireless user’s free roaming.
– Realizing dynamic SLS negotiation between user and network by the original QoS signaling protocol (DSNP).
ITSUMO Technology Suites (1/2)
DSNP: Dynamic SLS Negotiation ProtocolSLS: Service Level Specification*1: Refer to Appendixes for more information
Globecom 2001 – 14Telcordia Technologies, TARI and Toshiba Internal Use Only
ITSUMO Technology Suites (2/2) Wireless Multicast
– Localized Advertisement using RTCP feedback– Scope-based multicast
AAA Architecture *1
– Based on Diameter (Network-network AAA protocol developing in IETF) framework.– Supporting wireless user’s handoff by the local authentication using temporal “session
key”. – Increasing flexibility by designing original protocol, BURP, that is used between user
and the network independent of Diameter.
IP-PSTN integration– SIP and MGCP Protocol Suite– Call-Agent
IP based Wireless Access Point– IP centric wireless access point to support a hot spot.– Realization of the soft-handoff in the radio access network consisting of the IP network.
AAA: Authentication, Authorization and AccountingBURP: Basic User Registration Protocol*1: Refer to Appendix for more information
Globecom 2001 – 15Telcordia Technologies, TARI and Toshiba Internal Use Only
Configuration - DRCP Principles
Shrink message size Minimize messages in transactions Minimize use of Broadcast
– In wireless technologies, e.g., cdma2000, broadcast bandwidth is a scarce resource.
One Possible Solution:– Server Advertisement
It gives deterministic use of broadcast. Client can use link layer unicast.
Tradeoff with latency of configuration.
Globecom 2001 – 16Telcordia Technologies, TARI and Toshiba Internal Use Only
DRCP vs DHCP Messages
0
50
100
150
200
250
DHCP DRCP
Mes
sag
e S
ize
(in
byt
es)
DHCP - 236 bytes DRCP - 14 bytes 94 % improvement
Globecom 2001 – 17Telcordia Technologies, TARI and Toshiba Internal Use Only
Signaling/Binding - SIP Mobility - Handoff
Corresponding Host at Mobile Host at
IP0SIP signaling
RTP
Invite user@domain
Contact user@IP2
IP1
-> IP2
Mobile Host
SIP UA
RAT/VIC
IP2
RTP
SIP signaling
Globecom 2001 – 18Telcordia Technologies, TARI and Toshiba Internal Use Only
SIP Mobility - Handoff -
BS
Correspondent Host (CH)
BS
2. re-INVITE
3. Send Data to New Address
By sending SIP re-INVITE message from new location, CH starts sending its voice packets to the new location and Communication continues seamlessly
Globecom 2001 – 19Telcordia Technologies, TARI and Toshiba Internal Use Only
MSMS: Mobile Station
QGS: QoS Global Server
QLN: QoS Local Node
RAN: Radio Access Network
Domain 1 Domain 2
QGS QGS
QLNQLN
QLN QLN QLN
QLN
DHCP server DHCP
server
Global IP Network
RANRAN
RAN
RANRAN
RAN
AAA server
AAA server
1
2
ITSUMO QoS Architecture
Globecom 2001 – 20Telcordia Technologies, TARI and Toshiba Internal Use Only
DIAMETER Client
RAN inHome Net
Correspondent Host
BURP Server w/Firewall
DIAMETER Server(AAA Home)
Domain1 (Home network)Domain1 (Home network) Domain2 (Foreign network)Domain2 (Foreign network)
RAN1RAN2
Pre-shared key for alice@domain1
Mobile Station
BURP ClientNAI=alice@domain1
Temporary key for alice@domain1
DIAMETER Server(AAA Foreign)
DIAMETER ClientBURP Server w/Firewall
ITSUMO AAA Architecture
Globecom 2001 – 21Telcordia Technologies, TARI and Toshiba Internal Use Only
– Providing IP-based security mechanism for access networks especially for WLAN
Methods– User authentication (with roaming support)
– UNAP (User-Network AAA Protocol)• Runs between user device and Authentication Agent as a front-end AAA
protocol such as Diameter/RADIUS• Supports periodical re-authentication for logoff detection and connection
hijacking protection• Re-authentication is performed locally between user device and AA
• Supports distribution of site-specific security information such as IKE credentials (see below)
• Per-packet message encryption and integrity check (with roaming support)
– IPsec tunnel between client device and IPsec gateway
• Less overhead than PPP-based VPN solution• No pre-configration is needed for IPsec (IKE) parameters in the client
device
Security
Globecom 2001 – 23Telcordia Technologies, TARI and Toshiba Internal Use Only
Access Control Status
Session Establishment
Internet/Intranet
UNAP Hello[username=''xxx@yyy.com'']
UNAP Hello_ACK[challenge,username]
Diameter Answer [username, session-key, E[session-key]]
UNAP Open_ACK [ E[session-key], IKE-credential ]
Diameter Request [challenge, response, username]
If check is OK,create a session-key and encrypt it using the password
password
password for user xxx
Host UNAPserver with IPsec gateway AAA server
IKE-credentialsession key
IKE-credential
UNAP Open[challenge, response,username]
session key
Globecom 2001 – 24Telcordia Technologies, TARI and Toshiba Internal Use Only
Next Step: IPsec Tunnel Creation
Internet/Intranet
Host UNAP server with IPsec gateway AAA server
IKE-credentialIKE message exchange
::
IPsec tunne1
IKE-credential
Access Control Status
Globecom 2001 – 25Telcordia Technologies, TARI and Toshiba Internal Use Only
Local Server A
LocalServer C
LocalServer B
Local Subnet Local Subnet Local Subnet
StationGlobal
A Global Streaming NetworkInter ACNLinks
Internetin-theSky
IAL
Down Linkwithspot-beam
Up linkUp link
Broadband LEOs
TerrestrialINTERNET
Local Ad Server Local Ad
Server
IndividualBroadcaster
IP I/FTraditionalRadio/TV
WirelessIP I/F
IP I/F
Globecom 2001 – 26Telcordia Technologies, TARI and Toshiba Internal Use Only
Localized Multicast with Multiple Servers
S1 S2p1 p2
BS0 BS1
Sources
Backbone
Ad server
LocalServer
m1
m2
LocalProgram
RTSP
Ad server
LocalServer
m1
m2
LocalProgram
RTSP
BS2
M-Proxy
(P1,a1) (P2,a2)P2,a2
P2,a3
S0
S1
(a1,a2)
(a3)
IETF protocols SAP- Session Announcement ProtocolSDP - Session Description ProtocolRTP/RTCP - Real-Time Transport ProtocolRTSP – RealTime Streaming Protocol
Globecom 2001 – 27Telcordia Technologies, TARI and Toshiba Internal Use Only
Call Agent/RGW- IP- PSTN integration
Backbone Network
FX boardFX board
HA/DRCPserver
CA/SIP server
BaseStation
DRCPserver
CA/SIP server
MCAP/SIP-BCPT
AccessGateway
AccessGateway
MiniRGW
SIPUA
Solaris/NT Solaris/NT
SIP/M
GCP
ResidentialGateway
SIP/
MG
CP
Non-IP Phone
Non-IP Phone
Non-IP Phone
ResidentialGateway
IP Phone
SIP/MGCP
BaseStation
SIP/
MG
CP
MiniRGW
Globecom 2001 – 28Telcordia Technologies, TARI and Toshiba Internal Use Only
Call Connection
Agent/SIP server
CGWSIP Agent A
PC A
PC B
Call ProcessingCRCX+RQNT
INVITE
ACKResp. 180RingingRinging
ToneNotify
ACK
ACK
On hookNotify
ACKNo suspensionmessage
RQNT
ACK
Hangup detected BYEDLCX+RQNT
Performance Data
CGW Dials
Offhook
RQNT
Resp. 200 OK
ACK
Call Established
Call Terminates
SIP User to analog phone (SIP-MGCP)
Globecom 2001 – 29Telcordia Technologies, TARI and Toshiba Internal Use Only
ITSUMO Testbed Architecture
Backbone
VLAN Switch
3600 3600
Domain 1 Domain 2
R1
ERC1 ERC3
VLAN Switch
R2
ERC2
R3
ERC4
VLAN Switch VLAN Switch
SIPServer/Call Agent
SIPServer
Border Router Border Router
QOS QOSHA/DRCP
Server
DRCPServer
MulticastProxy
DRCPServer
DRCPServer
AAAServer
AAAServer
External OmniAntenna
Micro Macro DomainExternal Demo
QOSQOS
BURPBURP BURP
SIPServer/Call Agent
Globecom 2001 – 30Telcordia Technologies, TARI and Toshiba Internal Use Only
207.3.232.64/26backbone
DCA1
207.3.232.82
10.1.5.152
10.1.5.3
toshi16
207.3.232.112
netmeeting
OutdoorAP Outdoor
APOutdoor
AP
Indoor
Outdoor
10.2.1.110.2.1.121
10.2.1.122
network name = “ITSUMO outdoor”EC
onboardrouter
netmeeting onboard network
10.2.1.20110.2.2.152
10.2.2.151
10.2.2.1
GPS client
BEA Server
GPS Receiver
Globecom 2001 – 31Telcordia Technologies, TARI and Toshiba Internal Use Only
Unified Mobility Solution
DRCP
BURP
DSNP
MicroMobility
MacroMobility
DomainMobility
Detect a change in the point of attachment (from Layer-2 perspective)
Do Local AAA Do Global AAA
SLS negotiation
IP Level Configuration
Detect a change in the point of attachment (from Layer-3 perspective)
Detect a change in the point of attachment (from Layer-3 perspective)
IP Level Configuration
MS
SIP Mobility
Re-invite CH and send Register Msg
Re-invite CH and send Register Msg
Globecom 2001 – 32Telcordia Technologies, TARI and Toshiba Internal Use OnlyMH MH
tari.toshiba.com
Home AAADiameter
Server
visited AAADiameter
Server
Home SIPServer
Diameter Client
BURP Server
DRCP
Server
Diameter Client
BURP Server
DRCP
Server
Diameter Client
BURP Server
DRCP
Server
Research.telcordia.com
MH movesMH
DRCPClient
BURPClient
DRCPClient
BURPClient
SIPUA
DRCPClient
BURPClient
SIPUA
SIPUA
1 21 2
3 4 1 2 3 4
PublicSIPServer
BrokerAAA
DiameterClient
DiameterClient
Intra-domain subnet handoff
Inter-domain subnet handoff
Home SIPServer
DiameterClient
Demonstration using the outdoor extension
Globecom 2001 – 34Telcordia Technologies, TARI and Toshiba Internal Use Only
•Performance evaluation under the environment of Outdoor and/or fast moving.
•802.11b (WaveLAN)
•Area in a few thousand feet away from the building is covered by several Base Stations (BSs).
•Each BS forms a sub-area. The type of inter-sub-area handoff is assigned freely.
•It is available to experiment with a car moving at the speed less than around 45MPH.
•Service experiment:•IP based Terminal Authentication and/or Handoff•IP based Phone, Video and File share services.
Bea
m 1
IP based Real-time handoff
Intra-Subnet(Micro)
Inter-Subnet (Macro)
Inter-Domain
ITSUMO Testbed (Outdoor Portion )
Bea
m 2
Bea
m 3
Bea
m 4
Demonstration using the outdoor extension
Globecom 2001 – 36Telcordia Technologies, TARI and Toshiba Internal Use Only
SIP Indoor Mobility Demonstration
Globecom 2001 – 37Telcordia Technologies, TARI and Toshiba Internal Use Only
Thank You !
Q and A
Globecom 2001 – 38Telcordia Technologies, TARI and Toshiba Internal Use Only
Backup Slides
Globecom 2001 – 39Telcordia Technologies, TARI and Toshiba Internal Use Only
ITSUMO Outdoor Experiment
Base Station-Emulating cdma2000 by using WaveLAN
-Mobility test by using the eight radio cells
Globecom 2001 – 40Telcordia Technologies, TARI and Toshiba Internal Use Only
ITSUMO Outdoor ExperimentDriving route
300 m
Globecom 2001 – 41Telcordia Technologies, TARI and Toshiba Internal Use Only
Protocol Integration Demonstration
DRCP (terminal config.) SIP Mobility
– Handoff– Location Update
AAA for mobile users– BURP
QoS for mobile– DSNP
Unified Mobility Management
Globecom 2001 – 42Telcordia Technologies, TARI and Toshiba Internal Use Only
1. Unified Mobility Management
ITSUMO approach Unified Mobility
– Each function (i.e. terminal configuration, user registration and location update) must be adapted to the state of handoff, i.e., Micro-, Macro- and Domain Handoff.
Security based on a single framework– Single AAA framework supports both user registration and
signaling message authentication (e.g., SIP message authentication using AAA).
QoS with Mobile– Use Diffserv as a foundation to support a mobile user.
Globecom 2001 – 43Telcordia Technologies, TARI and Toshiba Internal Use Only
Time
MHSIP server/Diameter
Client
Diameter Request
Diameter Reply
SIP Register
SIP Register OK
SIP-AAA Interaction
SIP Server/Challenge (401)
SIP Register with/Challenge-Response
HomeAAA Server
SIP Registration
Subnet changes
Globecom 2001 – 44Telcordia Technologies, TARI and Toshiba Internal Use Only
R
R1 R2
S1 S2 S3 S4
Multicast Switch
S5
StreamServer
Ia Ib Ic Id
M1
m1
ia ib ic id
Mx
Lmx
ib
MulticastAgent
Mx
Msx
Localized Multicast Application with mobility
Sharing multicast address
Lmxn1
M1 Case1m1 = n1Case 2m1=! n1
Mapping:M1 ---> m1 (Cell 1)M1 ----> n1 (Cell 2)
m1Same subnetLocal
content
M1
Localcontentlm1
m1 lm1
CGMP/IGMPsnooping
Multicastproxy
Globecom 2001 – 45Telcordia Technologies, TARI and Toshiba Internal Use Only
ITSUMO Value Proposition
ITSUMO offers end users seamless IP connectivity across various wireless/wireline networks.
ITSUMO enables end users to select the best access network in terms of speed, cost and services.
ITSUMO enables network operators to manage a single network for various services and to reduce the cost for maintenance and modifications.
Globecom 2001 – 46Telcordia Technologies, TARI and Toshiba Internal Use Only
What is All IP Wireless and What for?(Research Background)
Data becomes dominant even in “wireless” world
Data is most efficiently carried by “IP(Internet Protocol)”
However, present IP technology cannot carry realtime voice/video in wireless world
This causes high infrastructure cost and difficulty in sharing wireline Internet application in wireless world
We will first solve this problem by developing - Wireless VoIP, IP signaling, Security, Unified addressing - Evolution scenario from current wireless to IP wireless
Globecom 2001 – 47Telcordia Technologies, TARI and Toshiba Internal Use Only
DRCP Message Flow
Client Server
ADVERTISEMENT
REQUEST
REPLY
Time axis
ServerClient
REQUEST/RELEASE
ACK
a) Client moves to new Subnet b) Extending the lease
Send DISCOVER when new server ADVERTISEMENT OFFER tells if need new IP address, re-register, ...
Globecom 2001 – 48Telcordia Technologies, TARI and Toshiba Internal Use Only
On going work and Future Direction
Multiple Radio Support– Introducing Bluetooth– Shadow MAC addressing
Network management– Monitoring Network in real time– Automatic entity configuration ( i.e. Plug and Play)
IPv6– Evolution of ITSUMO solution to IPv6
VoIP– SIP-MGCP-H.323 inter-work with Call Agent– Supporting “Services”, e.g. conference calls, voice mail,
Outdoor Extension / Service Application– Unified Mobility at the Renovated Outdoor Extension– IP paging (DMHA: Dormant Mode Host Alerting) – Location base service– IP Multicast
Globecom 2001 – 49Telcordia Technologies, TARI and Toshiba Internal Use Only
SIP Mobility
BS
Correspondent Host (CH)
BS
Mobile Host (MH) 1. Move
Established voice communication with SIP
Globecom 2001 – 50Telcordia Technologies, TARI and Toshiba Internal Use Only
ITSUMO Major Achievement
Established basic wireless IP network architecture– IP signaling / IP based base station / Evolution scenario
Proposed original wireless IP protocol suites– 4 original protocols (DRCP,HMMP,DSNP,BURP) created
– 21 contributions submitted to IETF/ MWIF/ 3GPP2
Created patents– 18 patents ongoing application (out of 38 patent ideas)
Developed testbed– Realistic demos for wireless IP network (micro/macro/domain
handoff)
Exhibited at major trade shows– PCS 99, CTIA 2000, COMDEX Fall 2000
Globecom 2001 – 51Telcordia Technologies, TARI and Toshiba Internal Use Only
Testbed Network Configuration
MS
10.1.4.x10.1.1.x
10.1.3.x
ERC1 (DRCP,QLN,BURP,FW)
HomeSIP Server (Registrar)
DCA1(AAAh) Click to
edit Master title style
Correspondent Host (CH)
DCA2(AAAf)
Globecom 2001 – 52Telcordia Technologies, TARI and Toshiba Internal Use Only
Basic idea of BURP
BURP uses EAP(Extensible Authentication Protocol) for flexibility of the authentication mean.– Complete authentication of MS with Home AAA (Diameter)
Server by using Pre-shared Key for Inter-domain handoff (i.e., Global AAA).
– Local authentication by using the Session Key which is temporally generated by the Home AAA server and shared between MS and a server in the foreign network for Intra-domain handoff (i.e., Local AAA).
– Periodical authentication (challenge-response) of MS in order to detect its movement or power-off.
Globecom 2001 – 53Telcordia Technologies, TARI and Toshiba Internal Use Only
Use diffserv as the foundation in the backbone Major components
– QGS (QoS Global Server) Retain global information of the whole domain Make QoS related decision and instruct QLNs what to do
– QLN (QoS Local Node) Retain local information of the resource available in the
local domain Ingress node of the diffserv domain
Architecture characteristics:– A central authority per domain with global information, and
several local ingress nodes with local information– QoS signaling and transport are separated
Central server deals with the QoS signaling (DSNP) Local nodes handle the actual transport traffic
ITSUMO QoS Framework
Globecom 2001 – 54Telcordia Technologies, TARI and Toshiba Internal Use Only
SIP Mobility
BS
Correspondent Host (CH)
BS
Mobile Host (MH) 1. Move
Established voice communication with SIP
Globecom 2001 – 55Telcordia Technologies, TARI and Toshiba Internal Use Only
SIP Mobility - Handoff -
BS
Correspondent Host (CH)
BS
2. re-INVITE
3. Send Data to New Address
By sending SIP re-INVITE message from new location, CH starts sending its voice packets to the new location and Communication continues seamlessly
Globecom 2001 – 56Telcordia Technologies, TARI and Toshiba Internal Use Only
Merits of SIP Mobility
Direct and Optimized Communication
One single and simple protocol for signaling and mobility management.
End-to-end mobility management support from the terminal no state in the network.
No need for interception and forwarding agents in the network.
No triangular routing of information, i.e., lower delay.- Provide mobility with route optimization in the absence of
Mobile IP (no home and foreign agents). Support real-time and non-real-time applications.
Globecom 2001 – 57Telcordia Technologies, TARI and Toshiba Internal Use Only
Security for the Mobile User
BURP: offers user registration/authentication at the application level with a AAA (Diameter) framework. BURP opens the firewall for authorized users.
BURP: supports local authentication for quick handoff as well as strong security, even in a visiting network.
SIP: “Register” message is authenticated by using AAA framework. Thus, a mobile’s location is updated more securely.
Globecom 2001 – 60Telcordia Technologies, TARI and Toshiba Internal Use Only
2. Localized Multicast Service
Multicast streaming traffic (audio/video) that is managed by the local server.
The local server can insert local program, information, advertisement into the global streaming program.
Timing for the local control is based on the information carried by RTCP from the streaming server.
Globecom 2001 – 61Telcordia Technologies, TARI and Toshiba Internal Use Only
Architecture of Localized Multicast for Advertisement
IETF protocols SAP- Session Announcement ProtocolSDP - Session Description ProtocolRTP/RTCP - Real-Time Transport ProtocolRTSP – RealTime Streaming Protocol
Ad server
Station 1 Station 2
LocalServer
M1M2
m1
m2
p1 p2
LocalProgram
Wireless Clients
Channelmonitor
Channeldatabase
SAP P1,a1
P2,a1
RTP/RTCP
Scope 1 Scope 2
lm
(Audio/Video)
Local SAP
IRC
Backbone
Globecom 2001 – 62Telcordia Technologies, TARI and Toshiba Internal Use Only
•Performance evaluation under the environment of Outdoor and/or fast moving.
•802.11b (WaveLAN)
•It is available to experiment with a car moving at the speed less than around 45MPH.
•Service experiment:•IP based Terminal Authentication and/or Handoff•IP based Phone, Video and File share services.
Bea
m 1
IP based Real-time handoff
Intra-Subnet(Micro)
Inter-Subnet (Macro)
Inter-Domain
Bea
m 2
Bea
m 3
Bea
m 4
3. Outdoor extension
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