Wireless LAN can quickly and conveniently resolve the problems of network connectivity, which are difficult for LAN based on wire. Basing on above advantages and the application of Figure Skating, we develop the real-time judging system of Figure Skating. It implements the video replaying which bases on DirectShow technology of COM criteria. The system is not only characterized by excellent mobility, but also efficiency, accuracy and equity during the judging process. In the experiment, the system is able to perfectly finish the real-time judging work for Figure Skating, and has a great instructing significance for skaters to improve their skills.

In long term evolution (LTE) networks, the multicast services can be transmitted by single frequency network (SFN) mode or point-to-multipoint (PTM) mode, and the unicast services are delivered with point-to-point (PTP) mode. To avoid the network congestion in the LTE networks with the multicast and unicast mixed services, a load balancing (LB) scheme with PTM mode is proposed to minimize the demanded radio resources of the maximum load cell. The system model of the demanded radio resources is based on the signal to interference noise ratio (SINR) of multicast services with SFN mode and PTM mode. Then the minimization problem is solved by means of simulated annealing (SA) heuristics. It selects the optimal transmission mode between SFN and PTM for multicast services. Simulation results show that the proposed LB needs less demanded radio resources of the maximum load cell than SFN mode for all the multicast services.