ui-router : Make resource available in abstract view

I've created an app using ionic tabs template.

app.js

.state('tab', {
      url: "/tab",
      abstract: true,
      templateUrl: "templates/tabs.html", 
      resolve: {
        n : function () { return 10; }
      }
    })

tabs.html

<ion-tabs class="tabs-icon-top tabs-dark">

  <ion-tab title="Cart"href="#/tab/cart" badge='n' badge-style="badge-positive">
    <ion-nav-view name="tab-cart"></ion-nav-view>
  </ion-tab>

</ion-tabs>

I'm trying to make n available to the tab view and all it's child states (In this case, display it's value in the badge).

This is a simplified example, The real value will be resolved from some factory. The above example does not display the tag.

How can i do that ?