In a data recording and reproducing method, data blocks are recorded in a storage unit. The encoded videos may be combined together as an encoded composite video that is decoded to produce a display screen having each of the videos presented in a different region. The blades of the two impellers, which are radially or axially disposed, are overlapped so as to enhance the heat-dissipating efficiency of the blower. Thus, key information cannot be lost when the handover process is terminated at the HeNB GW, and an impact of the handover process on a core network is reduced, and the efficiency of a User Equipment handover is improved. The LEDs are configured to transmit light through the diffuser so that the emitted light simulates light from a traditional neon tube.