D2D (Device-to-Device) multimedia broadcast multicast service method on basis of beam forming and fountain codes
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The present invention relates to a wireless communications device in the device (D2D) Real-time Multimedia Broadcast and Multicast (MBMS) method, particularly relates to a fountain coding technique and technology into MBMS-based beamforming scheme D2D system, belonging to the communication technology field. When D2D ACK signal is received for each transmitter a feedback D2D receiving set, in accordance with the principle of the reception is proportional to the number of users and the power collector unrestricted redistribution D2D communication receiver receiving a current set of centralized power unrestricted maximum may transmit power such that the total D2D transmitter transmit power is always maintained at the maximum transmission power; method of the present invention can reduce the full range of the transmitting antenna radiation caused by an unnecessary waste of energy and interference to the neighboring cell users, and improve system D2D throughput.