© 2004 Mobile VCE 22 November 2005 Interactive Mobile TV: An Interworking Architecture Paul Pangalos King’s College London
© 2004 Mobile VCE Presentation Outline 1. The Mobile VCE Interworking Architecture 2. Interworking Functions and Protocols 3. Providing enriched services using the interworking framework
© 2004 Mobile VCE Mobile TV is not a dream anymore… «Je rêvais d’une boîte magique que je pusse emporter devers moi, qui me livrât des images et des portraits que je pusse animer ou qu’animât celui qui me les envoyait» Savinien Cyrano de Bergerac (L’autre Monde ou États et Empires de la Lune, 1657, p.211) «Je rêvais d’une boîte magique que je pusse emporter devers moi, qui me livrât des images et des portraits que je pusse animer ou qu’animât celui qui me les envoyait» Savinien Cyrano de Bergerac (L’autre Monde ou États et Empires de la Lune, 1657, p.211) Commercial networks operate in Korea; In the US a nationwide network is currently being deployed aiming at commercial operation within 2006; First European commercial networks are also expected to be launched within 2006;
© 2004 Mobile VCE «I dreamed of a magic box that I could carry towards me, which delivered images and portraits to me that I could animate or that animated which sent them to me» Savinien Cyrano of Bergerac (the other World or States and Empires of the Moon, 1657, p.211) «I dreamed of a magic box that I could carry towards me, which delivered images and portraits to me that I could animate or that animated which sent them to me» Savinien Cyrano of Bergerac (the other World or States and Empires of the Moon, 1657, p.211) Commercial networks operate in Korea; In the US a nationwide network is currently being deployed aiming at commercial operation within 2006; First European commercial networks are also expected to be launched within 2006; Mobile TV is not a dream anymore… translation
© 2004 Mobile VCE Mobile telecom networks Interactive one-to-one secure communication Mobility Authentication and Billing Web Portals Broadcast networks High transmission capacity Broadcast / one-to-many communication Rich Multimedia Content Electronic Service Guide Mobile and Broadcast collaboration Interworking between mobile and broadcast provides new value added services that each technology individually cannot provide in a satisfactory manner
© 2004 Mobile VCE Baseline IoN Reference Architecture
© 2004 Mobile VCE What does the Gateway Do?
© 2004 Mobile VCE Signaling Between Gateways
© 2004 Mobile VCE Network Reference Architecture
© 2004 Mobile VCE Terminal Reference Architecture
© 2004 Mobile VCE Overall System Architecture Network Identity Server Paging & Location tracking Device Presence Manager CII Network side User side Device Presence System Context Info DPS Functional Blocks: NIS: Network Identity Server PLT: Paging and Location Tracking DPM: Device Presence Manager Interfaces: CII: Context Information Interface DPSRM: Resource management to DPS Interface DPS: Network to Terminal Interface Legacy Applications Multicast Middleware UDPIGMP IP IoN-GM IoN-RM Other DB DPSRM DPS IoN Wrapper IoN Applications DPS 19/30
© 2004 Mobile VCE Security Objective: Provide a secure interworking environment How ? Two security issues Gateway-to-gateway communication Confidentiality, Integrity, Authentication, Availability. Applications and services: Secure Web Services A public key infrastructure Allow single-sign on capability
© 2004 Mobile VCE Multicast Group Management Objective: Improve efficiency by providing a seamless multicast service over interworked UMTS and DVB networks instead of just broadcast How ? Two steps: Identify and group receivers Based on terminal capabilities, available access networks at receivers location, receiver preferences. Select the appropriate delivery network(s) Taking into account user location, terminal capabilities of all interested receivers as well as local cell resources.
© 2004 Mobile VCE (Distributed) Resource Management Approach No centralised entity (compatible with interworking) An Interworking Resource Manager (IRM) in each network, complemented by Local Monitors, which communicate with each other via the Interworking Gateway Resource Management functions 1. Dynamic Access Network Selection Select the suitable access network, in terms of the most efficient resource usage in the service area 2. Adaptive Group-based Service Scheduling Batch multiple requests for the same service into a group for a specific duration and then serve them in the most efficient way (MBMS-DVB-H) 3. Caching and Broadcast Scheduling
© 2004 Mobile VCE Device Presence System (DPS) What is the DPS? The device presence system (DPS) communicates with its counterpart component to do the following: 1. To gather, process, store and disseminate user context information. 2. To provide operational functions (i.e. registration, service initiation, handovers, etc) 20/30
© 2004 Mobile VCE 1. User Context (gather and process) a. Application Context - Presence attributes (i.e. online, idle, offline), - Communication identifiers: (i.e. - Service Class (streaming, interactive, voice, background) - QoS requirements (bit rate, codecs, cost, etc) b. Interface Context Network/interface availability, Signal strength, Card inserts, interface configuration, etc c. Environment Context and User Profiles 21/30
© 2004 Mobile VCE Context Information Terminal capabilities Multicast Group Management Resource Management Mobility Management User preferences/profiles Terminal connectivity Device Presence System 24/30 1. User Context (store and disseminate )
© 2004 Mobile VCE An example: The Device Presence System Client Personal Global Identifier User Devices Device communication means and identifiers Network availability Content
© 2004 Mobile VCE 2. Operational Functions
© 2004 Mobile VCE 2. Operational Functions
© 2004 Mobile VCE Enriched services using the inter-working framework More than just TV on the phone
© 2004 Mobile VCE Interactivity is the key Should mobile operators integrate their mobile phones with DVB-H? TThis will benefit broadcasters by providing access to the lucrative mobile market and to a sophisticated billing system CConsumers will be encouraged to become passive television viewers leading to a reduction of cellular services such as call traffic. Viewers need to be encouraged to consume telecom services! ( Downloading, Voting, Merchandising, etc)
© 2004 Mobile VCE Possible Revenue Streams 1. Broadcast content to act as a teaser for use of the interaction channel as well as mobile services. (MMS and SMS*).*SMS still the killer application generating around £600/MB 2. Announcing cellular services through broadcast networks (i.e. weather, maps, ringtones, etc) 3. Delivering / caching 3G content to WLAN / DVB hotspots (Multimedia on Demand and Infostations)
© 2004 Mobile VCE Enriched Services through interworking Content Delivery Platform Handovers / Load Balancing Cashing and Broadcast Scheduling Multimedia on Demand Always Best Connected ( P2P downloads)
© 2004 Mobile VCE Content Delivery Platform Content Delivery Options Content: video clip(15MB) Service: Music Clips Please select: Send to mobile phone (cellular) (15 eur) - 8min Send to PDA (WLAN) (5 eur) – 4min Send to laptop (10 eur) - 1min
© 2004 Mobile VCE Handovers / Load Balancing
© 2004 Mobile VCE
© 2004 Mobile VCE Content delivery via different networks based on available coverage, capacity, delivery price and user context info Caching and Broadcast Scheduling 1. Content Request 2. Content Delivery
© 2004 Mobile VCE UMTS Broadcast Networks (DAB, DVB-H) Satellite GSM / GPRS Wireless LANs Multimedia on Demand
© 2004 Mobile VCE
© 2004 Mobile VCE Thank you !
© 2004 Mobile VCE Operational Functions
© 2004 Mobile VCE IoN Registration 1. personal global identifier 2. user profiles/terminal capabilities 3. available network interfaces Registration User Terminal IoN Home Gateway IoN Registration Reply 1. Registration status 2. Preferred networks Initialising DPS DPS Ready RETRIEVING AVAILABLE UPLINK INTERFACES… CONNECTING TO HOME NETWORK…
© 2004 Mobile VCE IoN Content Reply 1. Signalling configuration IoN Content Request 1. User Context 2. Content Content Request User Terminal IoN Home Gateway DPS ACTIVATING ALL INTERFACES… RETRIEVING AVAILABLE NETWORKS AT CURRENT LOCATION… MULTICAST ADDRESS “A” ASSIGNED FOR SIGNALLING MULTICAST ADDRESS “B” ASSIGNED FOR DATA WAITING FOR FURTHER MULTICAST SIGNALLING…
© 2004 Mobile VCE IoN Registrations Batching, Grouping and Network Selection Fake Users IoN Home Gateway BATCHING … IoN Content Requests GROUPING RESOURCE MANAGEMENT NETWORK SELECTION BATCHING BASED ON NUMBER OF REQUESTS GROUPING BASED ON USER CONTEXT, REQUESTED CONTENT & LOCATION NETWORK SELECTION BASED ON NETWORK AVAILABILITY
© 2004 Mobile VCE **IoN Configuration Reply 1. INTERFACE AND SERVICE CONFIGURATION PARAMETERS FOR EACH GROUP SET Network Configuration IoN Configuration 1. GROUP SETS - QOS SETS - CELL IDs IoN Home Gateway DVB IoN Gateway ** EXAMPLES: 1. DVB-H: Program Specific Information (PSI) and Service Information (SI) 2. WLAN: Access point information, Terminal information, Service Information.
© 2004 Mobile VCE Session Notification IoN Home Gateway DPS ASSIGN TERMINALS INTO THEIR REPSECTIVE GROUPS CONFIGURE WLAN / DVB-H INTERFACE(S) CONFIGURE TERMINAL TO RECEIVE SERVICE Multicast Configuration Info User Terminals … DVB IoN Gateway Confirm Connectivity
© 2004 Mobile VCE Confirming Connectivity (CC) Objective To check without any user interaction/intervention that the recently configured interface is able to receive the assigned service from the broadcast network. Concept A confirm connectivity message is transmitted from one interface (either on the cellular network or the terminal itself), and monitoring whether or not that same CCM is received on the interface under test
© 2004 Mobile VCE IoN Home Gateway Listening for echo… User Terminal DVB IoN Gateway CC Confirming Connectivity (CC) DVB-H3G CC CC ACK Waiting for content… MMOD **Content Delivery Request Content Delivery **Requesting different content flows from MMOD server with a specific QoS. (i.e. bitrate, encoding, framerate, etc)