How to pass data between 2 pages inside tabs

Ionic Framework ionic-v3
1 
<ion-tabs  >
        <ion-tab [root]="reserverRoot" tabTitle="Reserver" tabIcon="ios-calendar" ></ion-tab>
        <ion-tab [root]="lacarteRoot" tabTitle="Lacarte" tabIcon="ios-restaurant" [rootParams]="2"></ion-tab>
        <ion-tab [root]="aProposRoot" tabTitle="A propos" tabIcon="ios-information-circle" [rootParams]="3"></ion-tab>
        <ion-tab [root]="localiserRoot" tabTitle="Localiser" tabIcon="ios-pin" [rootParams]="tab2Params"></ion-tab>
        <ion-tab [root]="telRoot" tabTitle="Tel" tabIcon="ios-phone-portrait-outline" [rootParams]="6" ></ion-tab>
</ion-tabs>
2

you can make a provider and just share some variable

3

thank for reply
how can do that my data is dynamic
inside the page in tabs

4