Check your network connection and make sure that port 3659 (UDP) is open.

Hello @ghost053tr 

For Battlefield on PC, please enable the following online ports on your connection:

TCP: 80, 443, 9988, 20000-20100, 22990, 17502, 42127
UDP: 3659, 14000-14016, 22990-23006, 25200-25300

For specific instructions on how to open your ports, please visit http://www.portforward.com/ or contact your router manufacturer.

Also see this EA Help article for information on opening TCP or UDP ports: http://help.ea.com/en/article/opening-tcp-or-udp-ports-for-connection-issues/

Online ports for Battlefield 4

Electronic Arts Port Forwarding Ports List

Good luck.