7plus Frequent WiFi disconnection

Hi,

Am facing internet accessibility issue on my device, It is connected to WiFi but am not able to surf the internet, Whenever i reconnect am able surf the internet. this is happening every 10min. I have updated the ios and reinstalled ios using itunes also. I reset the network settings as well, i dont know the what the issue.. Please help me in this.

I have configured my wifi router as mentioned in apple forums, but Still am facing same issue.