You can refer the answer that I posted to my own (somewhat similar) question: https://stackoverflow.com/a/17152383/1710688
Since you already have a structure of timeseries objects you need to use the function fieldnames
(see MATLAB Documentation) to get values for each timeseries object.
You have hierarchical structure so you will also need to use the function class
(see MATLAB Documentation) to check if it is a timeseries object or a struct object in which case you need to again look at its fieldnames. I am not exactly sure on how to create a hierarchical signal bus object but hopefully this link on Using Bus Objects can help.
Hope that helps.