29-03-2011, 04:16 PM
[attachment=11274]
UMTS Architecture Overview
• An implementation of the IMT-2000 requirements
– WCDMA radio access
– Higher rates and QoS
• Major effort: Provide Internet oriented services!
– SIP based multimedia support
– Open interfaces
Modular approach
– Allows for independently evolving network components
• Physical entities grouped into Domains
• Grouping of protocols offer services in Strata
– Provided by one or several domains
• UMTS Architecture - (Physical) Domains
• Network Strata…what’s that?
• A (telecom?) way to abstract the notion “networks of networks”
• Stratified Reference Model -- SRM
• Strata -- Functional Aspects of UMTS
Application Stratum
• Packet Switched and Circuit Switched Domains
• One PLMN (Public Land Mobile Network) is One Mobile Operator
• Migration from GSM to UMTS crucial
• Coexistence over long period foreseen
• Multimode mobile equipment
• In more detail...
• GPRS -- Generic Packet Radio Service
• GPRS user plane for GSM and UMTS access
GPRS Mobility
• GPRS Roaming: two alternative ways
• PLMN Roaming: GPRS Roaming eXchange -- GRX
• UMTS QoS Architecture
• End-to-End approach
• IP vs. UMTS QoS
Policy Enforcement Point
Diffserv edge function
RSVP sender/receiver proxy
Mapping between IP and UMTS bearer QoS
UMTS QoS classes
– Conversational class
– Streaming class
– Interactive class
– Background
IP Multimedia (IM) Domain
• Support for real time multimedia services
• Combined support from PS and CS bearer services
IP Multimedia Subsystem
• UMTS Virtual Home Environment
• Provides portability for the Personal Service Environment
• Users presented with same personalized features regardless of network and terminal
• VHE components
– User Profile
– Generic QoS bearer services
– Call control (e.g. IMS)
– Service Toolkits
• CAMEL* (IN in GSM)
• OSA (API for 3rd party service development)
• User Profile(s)
The user profile aspects
– Classification (personal and service specific)
– Location and distribution
– Mgmt and access
– Policies
– Synchronization
– Security and privacy
– Format
3G Operator’s “Export Products”
• What have 3G operators to offer Service Providers?
• 3rd party involvement of Internet based service providers seen as essential for growth
• How to “export” the “3G functionality package”?
• The IN way too expensive...
– Compare number of SS7 developers with Java/HTML developers!
• IP transport and open interfaces enables
– Shared computing platforms for telecom and Internet applications
– Shared (IP) infrastructure
– Integration of IDCs and telecom hotels
(Note! Still Carrier Class performance and availability)
– Globally distributed “Home” servers…
• => Expected to give fast and cheap development for 3G applications!
• OSA - Open Service Access
• OSA - Open Service Access
• OSA and Server distribution
• Actual servers and the SCS may be distributed
• Optional to run on the same physical server or in one or more separate
Implications for application server placement in the network?
• So does all this fit into an Internet Service Architecture?
• ISP structure -- MO must adapt to this...
• ISPs, data centers, and perimeter protection
• GPRS operators -- MO needs to adapt to this
• GRX, a separate unsecure IP structure
• IMS...
Issues
• Performance implications on GTP tunneling and IMS backbone VPNs?
• Will application developers buy into the OSA idea?
• How easy will it be for current SPs to offer applications to mobile customers?
– Can OSA be easily distributed?
• Alternatives?
– Direct Internet access from mobiles…
– Service adaptation in overlay networks
• Mobile IP?
• Specialized Radio QoS overlay support network?
UMTS Architecture Overview
• An implementation of the IMT-2000 requirements
– WCDMA radio access
– Higher rates and QoS
• Major effort: Provide Internet oriented services!
– SIP based multimedia support
– Open interfaces
Modular approach
– Allows for independently evolving network components
• Physical entities grouped into Domains
• Grouping of protocols offer services in Strata
– Provided by one or several domains
• UMTS Architecture - (Physical) Domains
• Network Strata…what’s that?
• A (telecom?) way to abstract the notion “networks of networks”
• Stratified Reference Model -- SRM
• Strata -- Functional Aspects of UMTS
Application Stratum
• Packet Switched and Circuit Switched Domains
• One PLMN (Public Land Mobile Network) is One Mobile Operator
• Migration from GSM to UMTS crucial
• Coexistence over long period foreseen
• Multimode mobile equipment
• In more detail...
• GPRS -- Generic Packet Radio Service
• GPRS user plane for GSM and UMTS access
GPRS Mobility
• GPRS Roaming: two alternative ways
• PLMN Roaming: GPRS Roaming eXchange -- GRX
• UMTS QoS Architecture
• End-to-End approach
• IP vs. UMTS QoS
Policy Enforcement Point
Diffserv edge function
RSVP sender/receiver proxy
Mapping between IP and UMTS bearer QoS
UMTS QoS classes
– Conversational class
– Streaming class
– Interactive class
– Background
IP Multimedia (IM) Domain
• Support for real time multimedia services
• Combined support from PS and CS bearer services
IP Multimedia Subsystem
• UMTS Virtual Home Environment
• Provides portability for the Personal Service Environment
• Users presented with same personalized features regardless of network and terminal
• VHE components
– User Profile
– Generic QoS bearer services
– Call control (e.g. IMS)
– Service Toolkits
• CAMEL* (IN in GSM)
• OSA (API for 3rd party service development)
• User Profile(s)
The user profile aspects
– Classification (personal and service specific)
– Location and distribution
– Mgmt and access
– Policies
– Synchronization
– Security and privacy
– Format
3G Operator’s “Export Products”
• What have 3G operators to offer Service Providers?
• 3rd party involvement of Internet based service providers seen as essential for growth
• How to “export” the “3G functionality package”?
• The IN way too expensive...
– Compare number of SS7 developers with Java/HTML developers!
• IP transport and open interfaces enables
– Shared computing platforms for telecom and Internet applications
– Shared (IP) infrastructure
– Integration of IDCs and telecom hotels
(Note! Still Carrier Class performance and availability)
– Globally distributed “Home” servers…
• => Expected to give fast and cheap development for 3G applications!
• OSA - Open Service Access
• OSA - Open Service Access
• OSA and Server distribution
• Actual servers and the SCS may be distributed
• Optional to run on the same physical server or in one or more separate
Implications for application server placement in the network?
• So does all this fit into an Internet Service Architecture?
• ISP structure -- MO must adapt to this...
• ISPs, data centers, and perimeter protection
• GPRS operators -- MO needs to adapt to this
• GRX, a separate unsecure IP structure
• IMS...
Issues
• Performance implications on GTP tunneling and IMS backbone VPNs?
• Will application developers buy into the OSA idea?
• How easy will it be for current SPs to offer applications to mobile customers?
– Can OSA be easily distributed?
• Alternatives?
– Direct Internet access from mobiles…
– Service adaptation in overlay networks
• Mobile IP?
• Specialized Radio QoS overlay support network?