WinProp for the Planning of DVB-SH Networks

Digital Video Broadcasting - Satellite to Handheld

Application


The new Digital Video Broadcasting Standard (DVB-SH) aims to provide multimedia services to the mobile user on a cost-effective way by the interworking of satellite systems with 3G and 4G terrestrial networks.

AWE Communications continues with the development of a planning tool for DVB-SH considering the satellite as well as the terrestrial repeater segment in the framework of the ORTIGIA project. The basis of the tool development was achieved in the MAESTRO project in the sixth framework programme (see press release). Further collaborative partners include ESA and CNES.

The DVB-SH radio network planning tool allows the investigation of the network performance in terms of coverage, SNIR and system margin for different satellite and terrestrial repeater configurations within various environments (rural, urban, and indoor).

 



Structure of the DVB-SH RNP tool

Propagation


Based on the accurate prediction of the satellite and repeater (gap-filler) links in terms of path loss delay profiles by using deterministic ray-optical wave propagation models the defined DVB-SH network is evaluated. The calculation of the different path loss delay profiles forms the basis for the DVB-SH system simulation.


Satellite Transmitters:

For the wave propagation analysis of the satellite signals two different approaches are possible:

  • Deterministic Ray-Optical Modeling

    • Based on topography databases in pixel format and 3D building data bases in vector format

    • Considers dominant characteristics (reflection, diffraction, shadowing, waveguiding)

  • Empirical Wideband LMS Channel Model (only for satellites)

    • Provides typical profiles in the 2 GHz band

    • Based on the evaluation of mesasurement data

    • Parameters depending on the environment (rural, urban, and indoor)

As an example for an urban scenario the following figures describe

 



LOS visibility from satellite
(LOS given in green)
Prediction of received power
from satellite (in user terminal)

 
Terrestrial Repeaters:

The wave propagation of the terrestrial repeaters is computed with the rural/suburban and urban propagation models included in ProMan.


Network Planning


The DVB-SH system simulator includes a detailed modelling of the DVB-SH architecture (satellite segment, repeater segment, user terminal segment). In the simulator the different parameters influencing the link budget are considered and the OFDM air interface is modeled in a detailed manner (with different parameters like guard interval). By taking into account the predicted path loss delay profiles of the corresponding satellite and repeater links, different performance measures are calculated.

Features of network planning module:
  • Consideration of downlink 
  • Consideration of link budget for each contribution (adaptation of power and delay)

  • Sort contributions (satellite, repeaters) according to delay

  • Define OFDM receiver according to given parameters

  • Evaluation of C/N and SNIR ratios for different receiver types (portable/mobile)


Simulated SNIR coverage

Databases


The propagation models in WinProp work with many different types of databases depending on the scenario which is analyzed (e.g. topography, clutter or building data). Further information concerning the databases can be found on the database page.

DVB-SH Radio Network Planning Tool - A Hybrid Challenge



As the satellite coverage is extended with terrestrial repeaters (see figure), the planning tool must consider not only satellites or terrestrial transmitters. It must work with both, satellites and terrestrial transmitters. Especially the interference between satellite and terrestrial network makes it complicated to plan the broadcasting network.

The radio planning tool of AWE Communications is designed for the handling of such hybrid networks. The number of repeaters (depending on their configuration) can be determined in order to achieve coverage over an urban area, but also on nation-wide scale. Improvements of the indoor coverage due to terrestrial repeaters can be simulated.


 

Brochure with information about the DVB-SH module.

Application note to DVB-SH Radio Network Planning.

Presentation of the  DVB-SH Planning Tool.
Read more about satellite propagation
Read scientific publications related to DVB-SH

 

 





 
Our partners in DVB-SH:
(alphabetical order)







 





 






 
DVB-SH activities co-funded by
EU IST/FP6 project 

 



Read the official
Press Release

 

 






 
DVB-SH activities co-funded by
ORTIGIA project