signaling

Signaling

Table of content

• Signaling
  • OpenSAND Exploitation
  • OpenSAND Software Design

Just like DVB-S2 and DVB-RCS2/RCS utilize signaling messages to coordinate traffic, manage subscriptions and allocations, OpenSAND implements signaling for some of the same reasons.

Three types of signaling messages are implemented, inspired in those from the mentioned protocols:

• SAC: messages sent by the STs to request capacity allocations to the GWs.
• TTP: messages sent by the GWs to inform the STs about the allocated capacities.
• Logon/Logoff: messages exchanged between the GWs and STs to log-on/log-off the system.

OpenSAND Exploitation

These features are transparent to the user, and no configuration is needed.

No probes exist associated to signaling messages, although some logs are emitted when a certain type of signaling message has been received/emitted.

OpenSAND Software Design

All signaling messages are generated and treated in the Block Dvb (depending the type of message, they are generated or received in the BlockDvbNcc or BlockDvbTal).

Each type of message is implemented as an specialization of the template class DvbFrameTpl, with different header fields.