wireless - Intermittent wifi on Dell Inspiron 15 3565 with Ubuntu 16.04 LTS

I got my new Dell Inspiron 15 3565 preloaded with Ubuntu 16.04 LTS.

I'm first time user of Ubuntu. All working fine except the WiFi. It doesn't respond after 10 minutes. If I reboot the laptop it is back to action again, but for the next 10 minutes.

Can someone help me to find the problem and solve it?

Here is the result of lspci -knn | grep Net -A3; rfkill list:

$ lspci -knn | grep Net -A3; rfkill list
16:00.0 Network controller [0280]: Intel Corporation Wireless 3165 [8086:3165] (rev 79)
    Subsystem: Intel Corporation Wireless 3165 [8086:4410]
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi
0: hci0: Bluetooth
    Soft blocked: no

    Hard blocked: no
1: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

Output of wireless info script

Here is the result of the Network Diagnostics when the wifi had stopped working:

--2017-09-26 12:24:29--  https://github.com/UbuntuForums/wireless-info/raw/master/wireless-info
Resolving github.com (github.com)... failed: Connection timed out.
wget: unable to resolve host address ‘github.com’