摘要:
A system is provided for reducing latency data collection from space-based sensor satellites. A mobile vehicle platform, configured to travel around the Earth, includes a sensor module and a relay satellite terminal. The sensor module monitors certain conditions, circumstances, environments and/or situations occurring on or around, or associated with, the Earth, and generates sensor data resulting from the monitoring. The relay satellite terminal executes data communications with a first of a plurality of satellites while the mobile vehicle platform is in a first area within a communications range of the first satellite, and, upon moving to a second area within a communications range of a second of the plurality of satellites, the relay satellite terminal switches the data communications to the second satellite. The data communications relay the sensor data, via the satellites, to a central processing facility for aggregation, processing, analysis and/or dissemination of the data.
摘要:
Approaches are provided for an SDSN that employs a satellite network nodes, where central L2 network nodes are controlled via a centralized Controller. Link status information is obtained regarding links of each L2 node. Global routing constraints, satellite ephemeris data, and resource allocation information are obtained. A constellation topology of the network nodes is determined based on the ephemeris data. Network routes between pairs of endpoints are determined. Each route includes links based on the link status information regarding the links, the global routing constraints, the bandwidth resources of the links and the current allocation of bandwidth resources, and/or the constellation topology. A forwarding table is generated for each network node, wherein each forwarding table includes route entries providing a next hop indicating a destination for data packets, wherein the destination is associated with a link of the respective network node that represents a link of a respective route.
摘要:
Approaches are provided for a congestion detection algorithm for detection of congestion in outroute port queues (associated with respective satellite downlink beams), of a Layer 2 switch on-board a processing satellite, before the congestion reaches the point of dropping packets. Such approaches employ congestion notification protocols to inform all inroute sources of the congested ports. The on-board Layer 2 switch sends congestion notifications to the on-board system controller. The system controller broadcasts a notification reflecting the report of contested ports/beams to source terminals. The source terminals then segregate bandwidth requests regarding traffic destined for congested beams from traffic destined to all uncongested beams, and categorize such requests based on respective traffic priority levels. The system controller makes bandwidth grants according to congestion (for example allowing only higher priority traffic on congested beams) to alleviate the congestion conditions of the respective ports/beams.