Send Data to a Specific Vehicle

[yibork]

In my Eclipse MOSAIC simulation, I want to send a message to a specific vehicle using the routing information obtained from a received message. Currently, I extract the routing from the received message like this:

        MessageRouting receiverrouting = lastVehicleStatus.getRouting();
        Then, I create a new routing object to send a message:
        MessageRouting senderrouting = ((RoadSideUnitOperatingSystem) this.getOs()).getAdHocModule()
                .createMessageRouting().viaChannel(AdHocChannel.CCH).topoBroadCast();

However, I want to directly address the specific vehicle that sent the original message, ensuring efficient communication without broadcasting. Could you confirm:

• Is it possible to reuse receiverrouting to reply directly to the originating vehicle?
• If so, what is the best practice for modifying or enhancing the routing logic to ensure the message targets the intended vehicle specifically?
• Are there better naming conventions or practices to improve the clarity of receiverRoute and routing variables?

[kschrab]

Hi, theoretically you can send a message directly to a vehicle via a topological unicast. However, currently our couplings to OMNeT++ and ns-3 do not implement topological unicasts. Only SNS does. So If you are using SNS for adhoc-simulation, you can use:

MessageRouting receiverrouting = lastVehicleStatus.getRouting();

MessageRouting newRouting = getOs().getAdHocModule().createMessageRouting()
                .singlehop()
                .topological()
                .destination(receiverrouting.getSource().getSourceAddress())
                .build();

or in the old API format you are using:

MessageRouting receiverrouting = lastVehicleStatus.getRouting();

MessageRouting newRouting = getOs().getAdHocModule().createMessageRouting()
                .topoCast(receiverrouting.getSource().getSourceName(), 1);

Otherwise, you have to stick to the broadcast method and filter on application layer.

[yibork]

Thank you for the answer