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1. WO2020163825 - CONFIGURATIONS DE DÉBIT D'INFORMATIONS ET DE QUALITÉ DE SERVICE POUR FLUX DE DONNÉES DE BOUT EN BOUT DANS UN RÉSEAU SATELLITAIRE NGSO

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CLAIMS

WHAT IS CLAIMED IS:

1. A communication system comprising:

a non-geosynchronous orbit (NGSO) satellite constellation including a plurality of satellites configured to facilitate communication between edge-nodes including at least some of a plurality of user terminals and one or more gateways; and

a control center configured to control operation of the plurality of satellites and the edge-node,

wherein,

at least some of the satellites of the plurality of satellites are configured to perform on-board processing,

at least some of the satellites of the plurality of satellites comprise nonprocessed satellites,

the plurality of satellites are configured to use cross-links for inter-satellite connectivity, and

the plurality of satellites, the edge-nodes and the control center include hardware that guarantees end-to-end committed information rate (CIR) and quality of service (QoS) for admitted flows.

2. The communication system of claim 1, wherein the control center is further configured to secure an end-to-end network capacity by 24 x 7 flow admission control to support the CIR by evaluating all time- variant network paths that are encountered due to dynamic attributes of the

NGSO satellite constellation and location changes due to mobility of one or more of the plurality of user terminals.

3. The communication system of claim 1, wherein the edge-nodes are configured to perform edge-based QoS enforcement along with priority forwarding to satellites by using hardware and/or firmware, wherein the hardware and/or firmware are configured to:

analyze network ingress traffic to separate and mark packets with rates within the CIR from packets having rates within an excess information rate (EIR), and

discard packets with rates exceeding the EIR,

wherein intermediate nodes including satellites of the plurality of satellites are configured to implement color-based priority-based forwarding for packets that are marked as CIR compliant.

4. The communication system of claim 1, wherein packet losses due to link connectivity changes, caused by deterministic satellite orbits, user terminal mobility, link blockages and failures are minimized by updating packet forwarding tables at network nodes on new and old paths, taking into consideration path delay of every impacted network node from a destination edge-node.

5. The communication system of claim 1, wherein packet losses due to link connectivity changes, caused by deterministic satellite orbits, user terminal mobility, link blockages and failures, are minimized by duplication of packets at a source edge-node for a short period of time during a line-connectivity change transition.

6. The communication system of claim 1, wherein packet losses due to link connectivity changes caused by deterministic satellite orbits, user terminal mobility, link blockages and failures, are minimized by updating a destination ID for the plurality of user terminals at source edge-nodes and at one or satellites of the plurality of satellites that provides connectivity to a user terminal of the plurality of user terminals prior to a handoff, when user terminal IDs are not part of a network forwarding schema.

7. The communication system of claim 1, wherein packet losses due to link connectivity changes caused by deterministic satellite orbits, user terminal mobility, link blockages and

failures are minimized by disabling of a link layer segmentation prior to a link connectivity change.

8. The communication system of claim 1, wherein packet losses due to link connectivity changes caused by deterministic satellite orbits, user terminal mobility, link blockages and failures are minimized by link layer forwarding enhancements that reforward enqueued packets that could not be transmitted at a link layer.

9. The communication system of claim 1, wherein packet losses due to link connectivity changes caused by deterministic satellite orbits, user terminal mobility, link blockages and failures are minimized by link layer forwarding enhancements that provide short-term buffering of packets destined for a user terminal of the plurality of user terminals at a handoff destination satellite of the plurality of satellites, when user terminal IDs are not part of a forwarding schema and when user terminal handoffs occur across satellites.

10. The communication system of claim 1, wherein the edge-nodes are configured to insert sequence numbers into packets, wherein the sequence numbers are used to perform egress resequencing to reorder packets that are received out of sequence.

11. The communication system of claim 1, wherein the plurality of satellites and the edge-nodes are configured to use software-defined networking (SDN) to allow for an efficient control and configuration by allowing communication of control and configuration information with a reduced overhead.

12. The communication system of claim 1, wherein the hardware that guarantees an end-to-end CIR and QoS are configured to execute data rate and QoS enforcement algorithms based on a user’s service level agreement, and wherein the hardware includes application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) and/or firmware.

13. An edge-node comprising:

a transceiver configured to communicate with one or more satellites of an NGSO satellite constellation, one or more user terminals and one or more gateways; and

hardware configured by a controller, for minimizing packet losses, to perform at precise times:

forwarding table and destination ID updates;

duplication of packets for a short period of time; and

disabling of link-layer segmentation prior to a link-connectivity change,

wherein the edge-node comprises a gateway or a user terminal.

14. The edge-node of claim 13, wherein, to minimize packet losses, the transceiver is further configured to perform re-forwarding of enqueued packets that could not be transmitted at the link layer.

15. A satellite comprising:

a transceiver configured to communicate with one or more satellites of an NGSO satellite constellation, one or more user terminals and one or more gateways; and

hardware configured by a

times:

forwarding table and destination ID updates; and

disabling of link layer segmentation prior to a link connectivity change.

16. The satellite of claim 15, wherein, to minimize packet losses, the transceiver is further configured to perform re-forwarding of enqueued packets that could not be transmitted at the link layer.

17. A control center comprising:

a link configured to communicate with one or more satellites of an NGSO satellite constellation, one or more gateways and a plurality of user terminals; and

a processor configured to:

control operation of the one or more satellites, the one or more gateways and the plurality of user terminals; and

guarantee end-to-end CIR and QoS for admitted flows.

18. The control center of claim 17, wherein the processor is further configured to secure required end-to-end network capacity to support a CIR by evaluating all time-variant network paths that are encountered due to a dynamic nature of an NGSO satellite constellation and a location changes due to mobility of one or more of the plurality of user terminals.

19. The control center of claim 17, wherein the processor is further configured to perform precision time-based forwarding updates by computing deterministic link connectivity times, in reaction to failure scenarios including user terminal mobility and blockages, wherein computing deterministic link connectivity times includes calculating a precise time for forwarding update at each network element and taking into consideration path delays of every impacted network element.

20. The control center of claim 17, wherein the processor is further configured to ensure precision handover management and to allow efficient control and configuration of QoS enforcement algorithms using an SDN.