User Manual - twentynine
5.6.2
Inter-Packet Delay
The
Inter Packet Delay
is usually applied when multiple cameras are connected to one PC over the same
Network Interface Card (NIC). It enables the user to create a pause between consecutive packets which
reduces the amount of effective load and creates timeslots for packets from other devices on the connection.
Packet n
Packet 3
Packet 2
Packet 3
Packet 3
Packet n
Packet 2
Packet 1
Packet 1
Camera 1
Camera 2
Collision
Packets sending flow
Packets receiving flow
Figure 49: Packet flow while not using inter packet delay
If the
Inter Packed Delay
is not used, excessive collision between packets may occur which results in
data loss, like illustrated in Figure 49. Packets from two cameras are sent to PC over the same network
connection. Without any
Inter Packet Delay
set, collision between packets from different cameras may
occur in case of insufficient bandwidth. Figure 50 illustrates a well configured
Inter Packet Delay
to prevent
collisions.
Packet n
Delay
Packet 2
Delay
Packet 2
Delay
Packet 1
Packet 1
Camera 1
Camera 2
Packets sending flow
Packets receiving flow
Each camera has dedicated time slot
Figure 50: Packet flow while using inter packet delay
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SMARTEK Vision | User Manual - twentynine | Doc. v1.0.2
