Multi-user cooperative transmission method based on d2d inter-group communication

Abstract

The invention discloses a multi-user cooperative transmission method based on dimension to dimension (D2D) inter-group communication, mainly overcomes the defect that radio resources are wasted during multi-user communication, and provides a novel communication scene. The multi-user cooperative transmission method based on the D2D inter-group communication includes the steps that intra-communication is implemented, a user codes, the user sends messages to a base station, the base station decodes, the base station codes, the base station sends the messages to the user, and the user decodes. The multi-user cooperative transmission method based on the D2D inter-group communication can achieve the intra-communication under the premise that base station auxiliary is not needed, improves the utilization rate of the radio resources, lightens the burden of the base station, and lowers system interference. In addition, the multi-user cooperative transmission method based on the D2D inter-group communication can acquire multiplexing gains and diversity gains which are generated by a multiple input multiple output (MIMO) system under the condition that terminal equipment is limited by size, hardware and complexity, and achieves the purpose of improving system capacity and spectral efficiency.

Description

technical field [0001] The present invention belongs to the technical field of communication, and further relates to a multi-user coordinated transmission method based on D2D inter-group communication in the technical field of cellular communication. The present invention can realize information interaction between users in different D2D communication groups in a mixed network where cellular communication and terminal direct communication coexist. Background technique [0002] As a short-distance communication technology under the cellular network, Device-to-Device (D2D) can realize direct communication between terminal devices, and has huge advantages in saving resources, reducing interference and improving transmission efficiency. . The integration of D2D technology in the next-generation broadband cellular mobile communication system will significantly improve the network structure, enhance coverage, and increase system capacity. [0003] Terminal equipment is limited b...

AI Technical Summary

Problems solved by technology

Virtual multiple-input multiple-output MIMO technology can form a virtual multiple-input multiple-output MIMO system to solve the problem that the D2D user terminal cannot be configured with multiple antennas under the constraints of size, hardware, and complexity. D2D technology can achieve the goal of increasing system capacity. Space-time coding technology can achieve the goal of improving spectrum utilization, and network coding technology can realize the goal of adjusting transmission efficiency.

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