Multi-user operation and roaming over wide area networks · Product Evolution Future personal ......
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International Telecommunication Union Workshop on Satellites in IP and Multimedia Geneva, 9-11 December 2002 Multi Multi - - user operation and roaming user operation and roaming over wide area networks over wide area networks Paul Febvre System Architect, Inmarsat
Transcript of Multi-user operation and roaming over wide area networks · Product Evolution Future personal ......
International Telecommunication Union
Workshop on Satellites in IP and MultimediaGeneva, 9-11 December 2002
MultiMulti--user operation and roaming user operation and roaming over wide area networksover wide area networks
Paul FebvreSystem Architect, Inmarsat
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Technology Evolution Causing Social Revolution
Global Village
Always-on
Instant messaging
Mobile Access
Integrated Devices
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Personal Communicator -Product Evolution
Future personal communication devices will gain functionality, and support all access technologies
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Evolution of Service Provider Focus
Communications service provider focus is changing from network to service
At home
On the roadWhile travelling
While waiting (e.g. at airport)At the office
Flying
Abroad(at hotel)
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Increasing User Expectations
Multicast(group
communications)
Messaging(inc SMS)
Internet andIntranet Access
Voice
Users will expect a minimum set of basic services from theirservice provider via their preferred personal communicator
Broadcast(personalised infotainment)
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Service Model Considerations
Remote
Network
Satellite
Network
Public
Networks
Home
Network
Control Signalling
User Traffic
Customer Relationship
Or Other Intermediate
Wide Area Networks
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Network Relationships
o Intermediate Network Role• Visited Network (Trusted peer)• Transit Network (Un-trusted peer)• Transport Network (Subordinate)• Other
Transit Home
Transport
b) Peer (e.g. SIP?)c) Subordinate (e.g. MGCP?)
Remote
VisitedUser Usera) Remote AAA(eg RADIUS)
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Local Access TechnologiesPersonal
WLANAccess Point
User Technologies
Local Access Technologies
BluetoothBase Station
GSM/GPRS orUMTS Picocell
Satellite Modem Technologies
Fleet
Land Portable
Aero
Smart-phones
Notebooks
Infrastructure
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Tight vs Loose Coupled Architectures
o Tight-coupled• Remote Network is
extension of Satellite Network
• Satellite Network appears as Visited Network
• Changes to satellite network required for each new remote network technology
• QoS an internal resource problem
• Native Routing
o Loose Coupled• Remote Network
reached across Satellite Network
• Satellite Network is a Transit or Transport Network
• Changes to gateways required for each new remote network technology
• QoS an external interface problem!
• Routing at edge
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Tight vs Loose Coupled Inmarsat BGAN Example
Home Network
M T RAN CN
HLRBTS
GSM Pico-cell
PSTN
InternetRoaming Gateway
BTS Controller
WLAN Access Controller
WLAN Hotspot
Home Network
M T RAN CN
HLRBTS
GSM Pico-cell
PSTNPSTN
InternetInternetRoaming GatewayRoaming Gateway
BTS ControllerBTS Controller
WLAN Access Controller
WLAN Access Controller
WLAN Hotspot
Home Network
BTS Controller
MT RAN CN
HLRBTS
DTE
GSM Pico -cell
PSTN
Internet
Home Network
BTS ControllerBTS Controller
MT RAN CN
HLRBTS
DTE
GSM Pico -cell
PSTNPSTN
InternetInternet
Tight Coupled Architecture
Loose Coupled Architecture
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Home Network
MT RAN CN
HLRBTS
GSM Pico-cell
PSTN
Internet
Roaming Gateway
BTS Controller
WLAN Access Controller
WLAN Hotspot
Home Network
MT RAN CN
HLRBTS
GSM Pico-cell
PSTNPSTN
InternetInternet
Roaming GatewayRoaming Gateway
BTS ControllerBTS Controller
WLAN Access Controller
WLAN Access Controller
WLAN Hotspot
Inter-Network InterfacesRemote Network
SpecificHome Network
Specific
Generic: QoSGeneric: QoS
Generic: AAA
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Inter-network Protocols (Examples)
o AAA• Should be
extensible, eg. RADIUS
• Intermediate Network may act as a Proxy if operating as a Transit Network
o QoS• Session Description
(SDP) to allow Resource Optimisation
• SIP à Transit• Megacoà Transport
• Generic QoS• RSVP
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Opportunities
o A solution to this problem is a solution to the generic problem of supporting roaming across multiple domains, where resources are constrained in the wide area network for example:• 2G/3G over 3G (eg on trains)• 3G over fixed ISDN/ ADSL (eg in remote
office / hotel / home)
Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002
Challenges?
o There is one overriding challenge…o Interfaces at mobile domain…
• How should applications running on an external device request services from a mobile network?• This problem exists in all current mobile
networks à all current interface definitions are inadequate!
STANDARDISATION IS REQUIRED
