2results about How to "Reduce retransmission" patented technology

This invention discloses a joint optimization method for topology routing based on deep reinforcement learning, belonging to the field of UAV communication networks and routing. Specifically, UAVs are deployed within the test airspace to serve M mobile users. The test airspace is then gridded, and users publish task requests within a time step. UAVs, acting as nodes, are randomly deployed on the grid. For each UAV node, a Markov decision process is modeled and solved using a multi-agent reinforcement learning algorithm to obtain the movement decision for the next time step. This Markov decision process is repeated to obtain the final movement path for each UAV. For each task request, the corresponding UAV calculates the multi-index link cost function of its neighboring nodes and selects the neighboring node with the lowest cost value as the next hop for task transmission until the target node is reached. This invention improves the data transmission efficiency and network stability of ad hoc flying networks in complex dynamic environments.

The application provides a low-voltage distribution line state supervision method and system based on dual-mode communication, and belongs to the field of power line carrier communication. The current combined communication scheme is not perfect, and the terminal information collection and management of low-voltage transformer areas still have problems such as low receiving probability, more retransmission, and even island terminal conditions. The above method comprises the following steps: obtaining reference phase information on the transformer side, controlling multiple distribution terminals to upload local voltage phase segments within a preset supervision period; at the edge node, aligning the reference phase information with the local voltage phase segments uploaded by each distribution terminal, using least square estimation to obtain the phase difference of each distribution terminal relative to the reference phase information, and generating a phase correction table based on the phase difference; automatically correcting the phase label of each distribution terminal based on the phase correction table, and reorganizing the in-phase broadcast or multicast domain, and reassigning the communication time slots corresponding to the multicast domain.