User terminal and method for switching routing in low-earth orbit satellite network
AssigneeIndustrial Technology Research Institute
InventorsAn-Dee Lin, Hua-Lung Tsai, Ching-Chun Chou
Life of this patent
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Abstract
A method for switching routing in a low-earth-orbit satellite network, being adapted to a user terminal (UT), includes the following. Routing information is generated by the UT. The routing information is installed into a first routing table of a first satellite. The routing information is installed into a second routing table of a second satellite by the UT. The routing information of the first routing table is updated to relay information by the UT. The relay information corresponds to the second satellite. Handover from the first satellite to the second satellite is performed by the UT.
Claims10
A method for switching routing in a low-earth-orbit satellite network, being adapted to a user terminal, the method comprising:
- generating, by the user terminal, routing information and installing the routing information into a first routing table of a first satellite under control of the user terminal, wherein the routing information comprises a first contact time determined according to a flight trajectory model of the first satellite and a position of the user terminal;
- in response to the first contact time being reset to zero, determining, by the user terminal, a second contact time according to a flight trajectory model of a second satellite and the position of the user terminal, and installing updated routing information according to the second contact time into a second routing table of the second satellite;
- updating, by the user terminal, the routing information of the first routing table to relay information corresponding to the second satellite, wherein the relay information comprises a waiting time for retaining the relay information in the first routing table during handover and indicates transmission from an inter-satellite link to the second satellite;
- and
- after the updated routing information is installed into the second routing table and the routing information of the first routing table is updated to the relay information, performing, by the user terminal, handover from the first satellite to the second satellite.
A user terminal, comprising:
- a transceiver;
- a storage medium;
- and
- a processor coupled to the transceiver and the storage medium, the processor being configured to:
- generate routing information within the user terminal, and install the routing information into a first routing table of a first satellite, wherein the routing information comprises a first contact time determined according to a flight trajectory model of the first satellite and a position of the user terminal;
- in response to the first contact time being reset to zero, determine a second contact time according to a flight trajectory model of a second satellite and the position of the user terminal, and install updated routing information according to the second contact time into a second routing table of the second satellite;
- update the routing information of the first routing table to relay information corresponding to the second satellite, wherein the relay information comprises a waiting time for retaining the relay information in the first routing table during handover and indicates transmission from an inter-satellite link to the second satellite;
- and
- after the updated routing information is installed into the second routing table and the routing information of the first routing table is updated to the relay information, perform handover from the first satellite to the second satellite.
Dependencies are inferred from the claim text.