Patent ID: 9538530
Date: 2017-01-03
CPC Classifications: H04L,H04W,Y02D

Claim:
1. A device for detecting keep-alive, comprising: a collecting unit for collecting or capturing a plurality of packets transceiving between a plurality of wireless terminals and a plurality of servers; a preprocessing unit for mapping collecting or capturing time information of the packets which collected or captured by the collecting unit to at least one of identification information of wireless terminal, server identification information and port information; a slot allocation unit for allocating the mapped packets to each of a plurality of time slots on a timeline which generated according to the collecting or capturing time information; an ID(identification) assigning unit for assigning IDs to each of a plurality of sections on the timeline, wherein the assigning unit assigning same IDs to sections having time slots in which the packets are continuously allocated within a predetermined range; and a keep-alive detection unit for setting the sections which assigned same IDs to periodic sections, and for determining the periodic sections as keep-alive when the port information of the packets allocated to the time slots on the periodic sections is continuously unchanged.