H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
H04Q 3/66 (2006.01) H04B 7/185 (2006.01) H04L 12/56 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2142152
In a global communication system comprising a constellation of satellite nodes that move with respect to each other, data packets are routed across communication links in a evenly distributed fashion. Uniform link usage is achieved within allowed routes determined by end to end transport delay criteria. The routing method computes routes in advance using an iterative process which selects routes for each source - destination pair from an allowed feasible set of alternative minimal hop routes by trying to equalize link usage probabilities for the links involved at each step of the route determination process. The routing method takes into account link failures and link and node shutdowns. Minimum hop routes are selected based on maximizing network routing entropy resulting in a uniform usage of the system's communication links. Directed randomization of routes between source - destination pairs of nodes is implemented to prevent link congestion while minimizing packet transport delay. Individual routing tables are generated and maintained in each satellite node. The tables may be updated regularly to reflect changes in the traffic demand distribution and the physical node connectivity within the constellation which occur as a result of satellite motion and failures in the network.
Cdc Propriete Intellectuelle
Gowling Lafleur Henderson Llp
Motorola Inc.
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