AngularJS : How to pass multiple parameters to controller through ng-href?

I've a table containing edit button to update the record. When I'm passing single id to ng-href its working fine and opening form page:

Ex: In my index.html table

<a class="btn btn-warning" ng-href="#/provider/{{row._id}}">Edit</a>

But I want to pass one more parameter along with row._id to ng-href like:

<a class="btn btn-warning" ng-href="#/provider/{{row._id}}/collectionName/{{collectionName}}">Edit</a>

Its not working and redirecting to home page.

Here's my controller:

    $timeout(function () {
        if ($routeParams.id !== undefined) {                
            $http.get('/providerlist/'+$routeParams.id, {
                params:{
                    id:$routeParams.id, 
                    collectionName:$routeParams.collectionName
                }
            }).success(function (response) {
                alert(response);
                $scope.providerList = response;
                $scope.id = response['_id'];
            });
        }
    });

app.js for routing:

var ProviderApp = angular.module('ProviderApp', ['ngRoute'])
.config(['$routeProvider', function ($routeProvider) {
    $routeProvider
    .when('/home', {
        templateUrl: 'templates/home/index.html',
        controller: 'HomeController',
        controllerAs: 'home'
    })

    .when('/provider', {                            
        templateUrl: 'templates/provider/index.html',
        controller: 'ProviderController',
        controllerAs: 'provider'
    })                        
    .when('/provider/:id', {                            
        templateUrl: 'templates/provider/form.html',
        controller: 'ProviderController',
        controllerAs: 'provider'
    })                        
    .otherwise({
        redirectTo: '/home'
    });
}]);

Here what exactly I want to do is after clicking on edit button it should redirect to form.html with parameter/data of id and collectionName

Any help would be appreciated.