infiltration

1. Fencing 
2. thermal sensors (smart fencing system) in the fenced stretches  which would alert control rooms of any living being approaching the fence."This would work as an advance alert system where one would have time to reach the area where infiltrators might be attempting  
1. cut a fence and enter. Or a 
2. smuggler may be trying to pass on a contraband packet,"
3. laser wall ensure that anyone approaching the border or breaking the beam in an unfenced zone sets off an alarm. 
4.  anti-tunnel ground sensors(seismic sensors) which would be planted underground  
5. unmanned aerial vehicles and other surveillance equipment

http://timesofindia.indiatimes.com/india/BSF-plans-laser-walls-to-stop-infiltration-from-Pakistan/articleshow/45289681.cms