queryParams

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

router.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

const Router = EmberRouter.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('test', function() {
  	this.route('my-route');
    this.route('my-route2');
  });
  
  this.route('test2', function() {
  	this.route('my-route');
    this.route('my-route2');
  });
  
  this.route('test3', function() {
  	this.route('my-route');
  });
});

export default Router;

routes.test.js

import Ember from 'ember';

export default Ember.Route.extend({
  queryParams: {
  	b: {
    	refreshModel: true
    }
  }
});

routes.test.my-route.js

import Ember from 'ember';

export default Ember.Route.extend({

});

routes.test.my-route2.js

import Ember from 'ember';

export default Ember.Route.extend({
});

routes.test2.js

import Ember from 'ember';

export default Ember.Route.extend({
  queryParams: {
  	a: {
    	refreshModel: true
    }
  }
});

routes.test2.my-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  
});

routes.test2.my-route2.js

import Ember from 'ember';

export default Ember.Route.extend({
});

routes.test3.js

import Ember from 'ember';

export default Ember.Route.extend({
});

routes.test3.my-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  queryParams: {
  	a: {
    	refreshModel: true
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>

{{#link-to 'test.my-route'}}test/my-route{{/link-to}}
<br>
{{#link-to 'test.my-route2'}}test/my-route2{{/link-to}}
<br>
{{#link-to 'test2.my-route'}}test2/my-route{{/link-to}}
<br>
{{#link-to 'test2.my-route2'}}test2/my-route2{{/link-to}}
<br>
{{#link-to 'test3.my-route'}}test3/my-route{{/link-to}}
<br>
<br><br><br>
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "3.2.0"
  }
}