public function realWalk1d($oid) {

        $arrayData = $this->realWalk($oid);

        $result = array();

        foreach ($arrayData as $_oid => $value) {

            $oidPrefix = substr($_oid, 0, strrpos($_oid, '.'));

            if (!isset($result[$oidPrefix])) {
                $result[$oidPrefix] = Array();
            }
            $aIndexOid = str_replace($oidPrefix . ".", "", $_oid);
            $result[$oidPrefix][$aIndexOid] = $this->parseSnmpValue($value);
        }

        return $result;
    }