Entity ID for Entity Multicast

Question

Ho Jung Kim 2022-7-19

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1763660-entity-id-for-entity-multicast

评论： Altaïr 2025-5-16

I am working on a model that needs to print out the entity ID every time an entity enters a server. I am using entitySys.id to get the entity id, but it seems like when it goes through the 'Entity Multicast', the Entity Muticast is generating two new entities, so the input entity and the two output entitys' id is different (if input entity's ID = 1, output entity IDs are 2 and 3). Is there a way to fix this?

3 个评论
显示 1更早的评论隐藏 1更早的评论

Ho Jung Kim 2022-7-19

For a person who just started using simevents, that sounds very difficult, but I'll definitely look into it. Thank you.

Altaïr 2025-5-16

Hey @Yarthe,

Thank you for your input, but the original question is about entity ID handling in a SimEvents modeling environment, not about network multicast routing.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Altaïr 2025-5-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1763660-entity-id-for-entity-multicast#answer_1565353

在 MATLAB Online 中打开

Hey @Ho Jung Kim,

The Entity Multicast block is used to broadcast entities by cloning them and sending each copy with a specified Multicast tag. Any Entity Queue block set to receive entities via Multicast with the same tag will receive these cloned copies. Since the entities are cloned, each will have a unique ID different from the original entity's ID. More details about the Entity Multicast block can be found in the documentation using:

web(fullfile(docroot, 'simevents/ref/entitymulticast.html'))

To keep track of the original entity's ID, an attribute can be added to the entity. For example, attributes such as original_ID and new_ID can be included. The original_ID can be set as entitySys.id in the Entity Generator, and new_ID can be set as entitySys.id in the Entity Queue. This approach ensures that both the original and cloned entity IDs are tracked as the entities move through the model. Here's how the Entity Generator and Entity Queue event actions would look like:

Entity Generator: