Package switching network with a deterministic behavior
View Patent ↗A packet switching network including subscriber stations connected to each other through at least one switch, which has a behavior defined as deterministic in that any packet sent on the network from a source subscriber station joins the destination subscriber station(s) within a limited time. In the packet switching network each output port from each switch on the network satisfies the relationship: ∑ i number of virtual links passing through the buffer [ 1 + int ( ( Jitter In ) i + max Latency BAGi ) ] * ( max frame duration ) ≤ latency in which: the max latency value is a maximum residence time in an output buffer of the at least one switch, this value may be different for each switch in the network, BAGi is a minimum time between two consecutive frames belonging to a virtual link i, before they are transmitted, (Jitter In) i is Jitter associated with the virtual link i that represents a time interval between a theoretical instant at which a frame is transmitted, and its effective transmission that may be before or after the theoretical instant, and (max frame duration) is a duration of a longest frame on the virtual link i.
1. A packet switching network comprising:
a plurality of subscriber stations;
at least one switch configured to connect said plurality of subscriber stations to each other;
wherein each output port from each switch on the network satisfies the following relation:
Σ
i number of virtual links
passing through an output buffer
[
1
+
int
(
(
Jitter
In
)
i
+
max
Latency
BAGi
)
]
*
(
max
frame
duration
)
<
_
latency
in which:
the latency is a latency of each output port, the max latency value is a maximum residence time in the output buffer of the at least one switch, this value may be different for each switch in the network,
BAGi is a minimum time between two consecutive frames belonging to a virtual link i, before they are transmitted,
(Jitter In) i is a Jitter associated with the virtual link i that represents a time interval between a theoretical instant at which a frame is transmitted, and its effective transmission that may be before or after the theoretical instant, and
(max frame duration) is a duration of a longest frame on the virtual link i.
2. A network according to claim 1 , wherein the packet switching network is located on an aircraft.
3. A network according to claim 2 , wherein the at least one switch includes a first switch connected to a first graphic screen and a second graphic screen.
4. A network according to claim 3 , wherein the at least one switch includes a second switch connected to a flight parameters generator and an aircraft maintenance computer.
5. A network process according to claim 4 , wherein the first graphic screen displays flight parameters and the second graphic screen displays flight and maintenance parameters.
6. A packet switching network comprising:
a plurality of subscriber stations;
at least one means for switching for connecting said plurality of subscriber stations to each other;
wherein each output port from each means for switching on the network satisfies the following relation:
Σ
i number of virtual links
passing through an output buffer
[
1
+
int
(
(
Jitter
In
)
i
+
max
Latency
BAGi
)
]
*
(
max
frame
duration
)
<
_
latency
in which:
the latency is a latency of each output port, the max latency value is a maximum residence time in the output buffer of the at least one switch, this value may be different for each switch in the network,
BAGi is the minimum time between two consecutive frames belonging to a virtual link i, before they are transmitted,
(Jitter In) i is Jitter associated with the virtual link i that represents a time interval between a theoretical instant at which a frame is transmitted, and its effective transmission that may be before or after the theoretical instant,
(max frame duration) is a duration of a longest frame on the virtual link i.
7. A network according to claim 6 , wherein the packet switching network is located on an aircraft.
8. A network according to claim 7 , wherein the at least one means for switching includes a first means for switching connected to a first graphic screen and a second graphic screen.
9. A network according to claim 8 , wherein the at least one means for switching includes second means for switching connected to a flight parameters generator and an aircraft maintenance computer.
10. A network according to claim 9 , wherein the first graphic screen displays flight parameters and the second graphic screen displays flight and maintenance parameters.