37results about How to "Increase and rate" patented technology

The present invention relates to an ultra-dense millimeter-wave D2D communication interference management method, which mainly solves the shortcomings of the existing methods that the selection of beam width and resource allocation cannot be taken into account in the management of interference at the same time, and provides an ultra-dense ultra-dense technology based on joint beam width selection and resource optimization. The interference management method for dense millimeter-wave D2D communication includes the following steps: first, system modeling and interference management problem modeling are performed on the millimeter-wave D2D communication system; secondly, beamwidth selection is performed by particle swarm optimization to obtain an optimal beamwidth vector; finally Optimum joint power and time slot allocation vectors are obtained by using resource optimization based on convex optimization approximation; the interference management method based on joint beam width selection and resource optimization proposed by the present invention can effectively manage interference, increase the number of parallel transmission links, and obtain more High system and speed.

The invention relates to a mixed PLC / VLC system combined user pairing and subcarrier allocation scheme, belonging to the technical fields of power line communication and optical communication. In the user pairing stage, it is judged whether the number of users is divisible by 4. If yes, the users are divided into four groups in descending order of channel gain, and the first group and the third group, as well as the second group and the fourth group are paired according to the optimal user pairing scheme. ; Otherwise, pair the first user and the last user arranged according to the channel gain, and perform optimal user pairing for the remaining users according to divisible by 4. In the subcarrier allocation stage, each iteration executes the roulette operation, the crossover operation based on the crossover critical value, and the adaptive mutation operation until the convergence condition is met, at which point the subcarrier allocation schemes of all paired user pairs are output. The method of the invention can reduce the computational complexity while ensuring the mixed PLC / VLC system and rate, and can also take into account the fairness and user satisfaction of the mixed PLC / VLC system.