/**
  * 有线网络新的状态更新服务
  *
  * 
  * @return [String] json string
  */
 public function actionAjaxWlanRefresh()
 {
     $nodes = TopologyConfig::getWlanLinkStatus();
     $links = TopologyConfig::getWlanNodeStatus();
     $data = array_merge($nodes, $links);
     return json_encode($data);
 }