TE sending message while traveling

Hi,

I'm thinking about a way TEs can send messages while performing a travel task
on a network. I want the TEs to send messages when they arrive at special nodes
along their travel path.

I thought about creating an preempting task sequence in the special nodes'
onArrival trigger with a send message task and assign this sequence to the arriving TE.
But then the arriving TE will stop at the special node, send the message, and continue.
(Or not?) But I want the TE not to stop at the special nodes.
In addition, preempting travel tasks on networks is always tricky as written in
the documentation.

Of course I could let the special node itself send the message in its onArrival
but to have a better mapping to reality I want the TE to send the message.

Does anybody have some ideas how to achieve such a behavior?

Thanks
Paul

Hi,
if the way to insert a "TASKTYPE_SENDMESSAGE" in your Tasksequence between two travel Tasks isn´t a solution, I would send a message from NN´s OnArrival trigger to traveler and send your wanted message from Messagetrigger of your TE (traveler).
If you try out the second way, please be aware of how often the OnArrival Trigger is fired!

Hello Paul,

it won't be easy with the standard network, because while the Taskexecuter is off the network, the default network navigator controls the Taskexecuter. Then the navigator creates the kinematics,too. While the Taskexecuter is on the network the kinematics is found in the Taskexecuter himself. But there isn't any trigger in the kinematics, which creates events depending on the distance. You can only send delayed messages to create events. The delaytime can you retrieve with the command getkinematics and the querry type on the node where the current kinematics is written.

Preempting isn't a solution, because the taskexecuter leaves the network he is currently on and then he goes into offset travel. He won't enter the network on the path or edge again. He can only enter the network at network nodes.
Distance depending triggers are not common in flexsim. You can only create time depending events for example with sendmessage commands or tasks. To get a message while the taskexecuter is travelling is quite easy. You let the Task Executer send a delayedmessage and then let him travel. But that is only indirectly a distance depending message or event.

Jörg

Hi,

thank you both for your answers.

Sebastian, your solution is quite simple and works well.
You really opened my eyes. Somehow, I was always thinking in task sequences
and that I have to send my messages via a task sequence. But of course I can
also do it in the onMessage trigger of the TE.

Joerg, also thanks for your time delayed approach. I will keep it in mind for
similar scenarios.

Thanks again
Paul