A Hybrid Store-and-Forward and Dynamic Channel Allocation Approach for SDN-Enabled LEO IoT Networks
Annotatsiya
LEO satellite constellations are becoming a feasible option as a means of global Internet of Things (IoT) due to their large coverage, lower latency, and flexibility in deployment to a wide range of scenarios. However, the sheer number of IoT devices is an insurmountable challenge to the continued flow of data, especially when the availability of feeder links cannot be ensured.We suggest an architecture that combines a store-and-forward (S&F) paradigm and dynamic channel management in an SDN-based LEO satellite IoT infrastructure in the present study. The S&F mechanism enables satellites to momentarily store packets in the event of feeder connections and then resend them on getting connection again; this alleviates the effect of intermittent connections whilst maintaining the reliability of deliveries. At the same time, the SDN controller dynamically assigns channel resources based on traffic demand and the priority level of the devices, thus, balancing access opportunities and reducing the number of collisions in the access process in case of random access.To evaluate the efficacy of the proposed system, we develop analytical models that concentrate on key performance indicators such as packet delivery success rate, delay, throughput, and energy consumption. Our architecture results in very high reliability and resource utilisation, as seen in simulations, and thus it makes a strong candidate to large-scale IoT deployments using satellite technology.