D2D (Device-to-Device) multimedia broadcast multicast service method on basis of beam forming and fountain codes

Abstract

The invention relates to a device-to-device (D2D) multimedia broadcast multicast service (MBMS) method on the basis of beam forming and fountain codes, in particular to a MBMS scheme on the basis of a D2D system, in which a fountain coding technology and a beam forming technology are introduced, and belongs to the technical field of communication. Every when a D2D transmitting terminal receives an ACK (Acknowledgement Character) signal fed back by one D2D receiving set, according to a principle in proportion to the number of users in a receiving set of which the power is not limited, the maximum transmittable power of the receiving set of which the power is not limited in the current D2D communication receiving sets is redistributed, so that the total transmitting power of the D2D transmitting terminal is always kept into the maximum transmitting power. According to the method disclosed by the invention, the unnecessary energy waste and the interference to users in an adjacent origin cell, which are caused by the omnibearing radiation of a transmitting antenna, can be reduced and the throughput of the D2D system is improved.

Description

technical field [0001] The present invention relates to a device-to-device (D2D) real-time multimedia broadcast and multicast (MBMS) method in the field of wireless communication, in particular to an MBMS scheme that introduces fountain coding technology and beamforming technology into a D2D system, and belongs to communication technology field. Background technique [0002] Multimedia service is a very potential application that is optimistic about by the industry at present. It mainly means that mobile terminal users receive broadcast digital audio and video content in the form of channels or channels on intelligent mobile terminals with operating system and video functions. The MBMS (multimedia broadcast and multicast technology) standard based on the cellular network of the mobile communication system will carry the rapidly growing multimedia broadcast and multicast services in the future mobile communication network. 3GPP discussed and introduced MBMS and enhanced MBMS...

AI Technical Summary

Problems solved by technology

Although this guarantees the quality of service of users UE1 and UE2 in the two cells, it seriously reduces the quality of service of D2D receiving sets Set-1 and Set-3

Especially for the user terminals in Set-3, since they are far away from UE4, too low transmission power may cause communication interruption and affect the throughput of the entire D2D system

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