D2D pair user scheduling method based on MIMO precoding in cellular district

Abstract

The invention relates to a D2D pair user scheduling method based on MIMO precoding in a cellular district. The method comprises the following steps: 1), according to a precoding mode, selecting a space-division user group for downlink scheduling; 2), determining a D2D pair alternative set; 3), D2D pair emission end user emitting a test signal with D2D pair sequence number information; 4), classifying D2D pairs in the alternative set into a first type and a second type; 5), selecting an interference inhibition channel, obtaining a precoding matrix, and accordingly, performing precoding processing on the downlink channel of a base station; and 6), broadcasting the sequence number information of the D2D pairs, and determining whether the D2D pairs can be scheduled within a current scheduling period. Compared to the prior art, the method provided by the invention has the following advantages: the coverage scope of base station signals is not reduced, at the time when scheduling of D2D pairs at the edge of the district is not affected, the D2D pairs in the center of the district can also be scheduled, and the distribution flexibility of the D2D pairs in the district is improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a D2D user scheduling method capable of effectively reducing and suppressing co-frequency interference of a downlink of a base station and a D2D communication link. Background technique [0002] D2D (Device-to-Device), that is, terminal direct technology, refers to a method in which adjacent terminals can transmit data through direct links within a short distance without infrastructure equipment for forwarding. The two most intuitive features of D2D technology are direct communication and short-distance communication. Direct communication can reduce processing delay, while short-distance communication can save terminal power consumption, thereby reducing interference and improving spectrum resource utilization. In addition, the wide distribution of communication terminals and the flexibility of node mobility can extend the coverage of the network, while operating in ...

AI Technical Summary

Problems solved by technology

Existing related patents avoid interference based on the location of the user in the cell. The solution is that the D2D pair selects the farthest cell user to reuse its resources. The edge of the cell reduces the flexibility of D2D distribution, or requires base station power control, which reduces the coverage of base station signals

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