private function startTimeRegister()
    {
        if ($this->rTimer === null && $this->flags['enableHeartbeat'] === true && $this->flags['enableTimeRegister'] === true)
        {
            $proxy = $this;
            $this->rTimer = $this->loop->addPeriodicTimer(($this->options['timeRegisterInterval']/1000), function() use($proxy) {
                $now = round(microtime(true)*1000);
                $proxy->connectionPool->setNow(function() use($now) {
                    return $now;
                });
            });
        }
    }