I browsed through the Internet and got to know that WICD Network Manager fixes this issue. Earlier I have been using Ubuntu 12.04 where the same issue was fixed by making use of WCID Network Manager.
Recently I upgraded to 13.10 and as I got the same network issue in default NetworkManager, I have installed WICD NetworkManager but when I try to open WCID, I get an alert message saying,
Could not connect to wicd's D-Bus interface. Check the wicd log for error messages.
When I click on OK, I get the same message again and when I click on OK again I get the following message,
Error connecting to wicd service via D-Bus. Please ensure the wicd service is running.
Any help to fix this issue is greatly appreciated as this issue was annoying me since I installed 13.10