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RL signals | State | Action | Reward |
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DROM [43] | The traffic matrix (TM) of the network | The weights of links in the network | The network operation and maintenance strategy |
TIDE [44] | The traffic matrix (TM) of the network | The weights of links in the network | The QoS strategy |
Stampa et al. [45] | The traffic matrix (TM) of the network | The weights of links in the network | The mean network delay |
Pham et al. [46] | The traffic matrix (TM) of the network | The weights of links in the network | The mean of QoS metrics/the mean of qualified flows |
DQSP [47] | The frequency of packet-in message, the occupancy rate of the flow table, and the channel occupancy rate | The weight of the node assigned as the next hop | The node packet loss rate, node forwarding delay, and flow table status |
QR-SDN [48] | The currently selected path for each flow | Determine the path of flow(s) | The sum of latencies along the current paths of the flows |
IHSF [49] | The path reliability, delay, bandwidth utilization, and the number of disturbed flows in case of link’s failure | Determine the path of flow(s) | The path’s reliability level, the minimum number of disturbed flows, maximum bandwidth utilization, and minimum delay |
Proposed RED-STAR | The service type, current bandwidth utilization, packet loss rate, and the latency of each link | Determine the path of flow(s) | The QoS requirements of services and link utilization balancing |
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