Stop packet scheduler for sometime

I am a beginner with Openwrt. I am using TP-link archer C6.

I am working on an application in which I am required to have two queues say Q1 and Q2. Q2 will contain all the packets addressed to a particular destination ip address. I basically need to stop the router from transmitting anything as soon as the packet scheduler processes a packet from Q2 for eg 4 ms. All the packets which arrive on the ingress port during the 4ms period can be buffered in these queues. After 4ms the router can resume working normally. How can I achieve this?