The MoDiS experimental platform for the validation and demonstration of S-DMB functions and services I. Andrikopoulos, G. Kolonias Space Hellas T. Gallet, M. Durand Alcatel Space J. Vandermot, T. Dubois Agilent Technologies L. Roullet UDcast E. Bourdin Ercom
Outline � MoDiS project overview � S-DMB concept � MoDiS experimental platform � Validation approach � Trials and Results � Conclusions
The MoDiS project � MoDiS (Mobile Digital Broadcast Satellite) is an IST project partially funded by the European Commission under the FP5 framework � Started April 2002, duration 30 months � Co-ordinated by Alcatel Space [F]; Project Manager: Michel Mazzella � Daimler Chrysler [D], University of Surrey [UK], Agilent Technologies [B], Elitel [I], UDCast [F], Space Hellas [EL], Ercom [F], Alcatel Bell Space [B] and Monaco Telecom [MC] � Expected results � Proof of S-DMB concept through experimentation of critical issues � W-CDMA efficiency in broadcast mode with hybrid satellite/terrestrial transmission � Harmonisation with 3GPP MBMS standards � Service demonstration � Streaming � Push & store with adaptive caching in terminals of video / audio / web-based contents � Groupcast (P2P)
S-DMB concept 7 spots over High power Europe Geo-stationary satellite 3G handset Satellite distribution link in IMT2000 mobile satellite band 3G Air interface Hub based on 3G equipment Interactive link in IMT2000 mobile terrestrial band + Content providers Content 3G Mobile Network Network MBMS Broadcast/Multicast 3G Base Local storage Service Centre station � Broadcast / multicast layer based on combined satellite and terrestrial repeaters architecture over 3G cellular networks
MoDiS experimental testbed Distribution link Multimedia 3GPP air contents interface Satellite SDMB emulator receiver Content Terrestrial manager repeaters HUB MoDiS + MMI (x2) emulator terminal MoDiS data server 3G terminal SGSN GGSN 3G network Interactive link
Validation approach � To accelerate the Transmission testbed : Macro-diversity, Synchronisation, Power saving adaptation/development of various MoDiS terminal Satellite/Hub Hub network components and the validation (transmission simulator + function part) Terrestrial repeater emulator procedures, the MoDiS testbed was split into two distinct sub-testbeds: the application testbed � Application testbed : Content delivery, Reliable transport, Cache the transmission testbed � management, CDD usage, Conditional content use � This approach allows for: MoDiS terminal MoDiS Data Server (application part) Simultaneous implementation of the � features to be validated and facilitated the assembly of the corresponding subsystems into a single testbed that Complementary Mobile Network for the complete MoDiS testbed exhibits the full MoDiS functionality in an integrated manner. MoDiS terminal 2.5 G / 3G 2.5 G / 3G (2.5 G / 3G Access Network Core Network Various features to be demonstrated � terminal part) by using either of the two sub- testbeds Functional view
Transmission testbed Data Data source analysis Network analyser IUB/ IUB/E1 STM1 RNC Node B Combiner Attenuator Adaptator simulator HUB network fct emulator Satellite /Hub SDMB receiver emulator RF cable (3GPP interface) Frequency Attenuator converter Terrestrial repeater
Application testbed MoDiS terminal MoDiS data server Scheduling/ Cache Mgr routing unit GPS terminal terminal Application device File server Web server cam MoDiS terminal Scheduling/ Cache Mgr Scheduling/ routing unit PDA terminal routing unit Ethernet server terminal switch WLAN LAN: plays the role of both the WLAN uni-directional S-DMB link and access point the interactive (2..5G/3G) link
Detailed MoDiS testbed configuration MoDiS data server Car MoDiS terminal Scheduling/ Cache Mgr routing unit Application terminal File terminal server server Ethernet switch Web cam - GPS Scheduling/ routing unit Ethernet server switch Car IP + 2.5/3G Network SDMB receiver Trolley MoDiS terminal Scheduling/ Cache Mgr routing unit terminal terminal IUB/E1 RNC Node B Adaptator simulator Ethernet MCT switch Web HUB network fct emulator network Satellite /Hub cam - GPS emulator WLAN access point Frequency converter PDA 3GPP air SDMB receiver Terrestrial repeater (2x) interface
MoDiS data server - P2P clients MoDiS T al contribution + position MoDiS T al - access for not-cached- in-terminal content - content / CDD Application association - Emergency server File Server notif. creation Content Provider Video (ex. LeMonde) files Text Audio + Redaction files images Terminal - content upload CDD CDD - CDD creation Streaming server w or w/o CDD - broadcast scheduling - CDD parsing - streaming session - content file lock scheduling & control for broadcast https/sftp/ssh Scheduler and Routing unit C o n t e n t m u i t l p l x e g n i u P s h m u t l i p l e x g i n system call Q u u e e d f l i e s 1 ( a c t i v e c a h c e ) F i l e N F i l e N + 1 F i l e N + 2 Q u e u e d f i l e s 2 ( C D D ) c d d x c d d x + 1 c d d x + 2 c d d x c d d x + 1 d c y c d d d y + 1c d d + y 2 c d d y + 3 c d d y 4 + XML Q u e u e d f l i e s 3 ( e m e r e g n c ) y SDMB Hub M s 1 g M s g 2 M s g 3 RTP / WindowsMedia Queues Mgnt S r t e a m i n g s t r e a m script I P m u l i t l e p x g n i push engine configuration Bandwidth allocation
MoDiS terminal Antenna Radio Radio Ethernet Ethernet Ethernet Ethernet Protocol stack Protocol stack Inner Modem Inner Modem Outer Modem Outer Modem RAKE RAKE Application Application IF IF IF IF PCI PCI S-DMB Receiver S-DMB Receiver 2.5G 2.5G 3G 3G 3G 3G GPS GPS GPS GPS Phone Phone Phone Phone Phone Phone
MoDiS terminal - internal interfaces of the application part
The trials � Signal quality � Macro diversity � Power consumption � Reliable transport � Content delivery � Conditional access � Applications
Parameters for trials � Number of sources � due to the choice of the test road � Power level of the sat emulator � Power level of IMR � same level for both IMRs � Modes (data rate) and Type of services � with simultaneous emergency services � Terminals � trolley alone (with potentially car alongside) and car alone
Monaco trials site Terrestrial repeater 2 COSTAS S atellite E mulator JARDIN EXOTIQUE 1 Terrestrial repeater 3 MINISTERE
The satellite…
The MoDiS vehicle
MoDiS car terminal
The user…
Receiver measurements � TX Power: -90dBm Mode: 12K2 BLER AGC RAKE
Rake visualiser
Push & Store, Streaming and Emergency Services
Groupcast service architecture � This service allows end users to send in a cost efficient way the same content to a group of users. � Ideal for PPDR and SAR applications
Groupcast - Chat
Groupcast - Video/Image messaging
Groupcast - Location mapping
Conclusions � MoDiS enables the demonstration of the S-DMB proof of concept through experimentation of the system main features and by demonstration of representative multicast/broadcast services � Trials are ongoing and final results are expected by mid-October � The MoDiS experimental platform is currently being upgraded in the frame of the MAESTRO FP6 IST project � More information can be found at: � http://www.ist-modis.org
Recommend
More recommend
