Calling ionViewWillEnter in ion-tab child of ion-tabs

Is there a way to communicate from a page that contain ion-tabs to the page that is linked to the ion-tab child
I want to call ionViewWillEnter function in the ion-tab to update it , when comming back to it with a back button

But the event isn’t detected and it can only be detected in the page that contain the ion-tabs

Any hints or suggestions to help me.
Thanks in advance.