Smart health systems improve our quality of life by integrating information and technology into health and medical practices. Such technologies can significantly improve the existing health services. However, reliability, latency, and limited network resources are among the many challenges hindering the realization of smart health systems. Thus, in this paper, we leverage the dense heterogeneous network (HetNet) architecture over 5G network to enhance network capacity and provide seamless connectivity for smart health systems. However, network selection in HetNets is still a challenging problem that needs to be addressed. Inspired by the success of Deep Reinforcement Learning (DRL) in solving complicated control problems, we present a novel DRL model for solving the network selection problem with the aim of improving medical data delivery over heterogeneous health systems. Specifically, we integrate the network selection problem with adaptive compression at the edge to formulate an optimization model that aims at minimizing the transmission energy consumption while meeting diverse applications' Quality of service (QoS) requirements. Our experimental results show that the proposed DRL model could minimize the energy consumption and cost compared to the greedy techniques while meeting different users' demands in high dynamics environments.
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