Traffic Light Based Intelligent Routing Strategy for Satellite Network

This scheme investigates a traffic-light-based
intelligent routing strategy for the satellite network,
which can adjust the pre-calculated route according to
the real-time congestion status of the satellite
constellation. In a satellite, a traffic light is deployed at
each direction to indicate the congestion situation, and is
set to a relevant color, by considering both the queue
occupancy rate at a direction and the total queue
occupancy rate of the next hop. The existing scheme uses
TLR based routing mechanism based on two concepts are
DVTR Dynamic Virtual Topology Routing (DVTR) and
Virtual Node (VN). In DVTR, the system period is divided
into a series of time intervals. On-off operations of ISLs
are supposed to be performed only at the beginning of
each interval and the whole topology keeps unchanged
during each interval. But it has delay due to waiting stage
at buffer. So, this method introduces an effective
multi-hop scheduling routing scheme that considers the
mobility of nodes which are clustered in one group is
confined within a specified area, and multiple groups
move uniformly across the network.