Other design constraints and variable¶

1. Network constraints

• Frame format

The application foreseen aims at transmitting various contents (data and video on the downlink), so we choose to use the MPEG-4 coding standard. The associated frame format MP4 is particularly adapted for the encapsulation of multimedia data type (ie video).

• Protocol stack

1. Antenna choice

• On board antenna

The antenna placed on the aircraft must be compliant with the flight constraints listed in the introduction. Indeed, we should maintain the communication link while the aircraft is performing a turn ( +/- 15° attitude), landing or taking off ( +/- 45° inclination). Therefore, he position of the antenna must be carefully determined in order to be at LOS.

Another constraint is the embedded

• Ground station antenna