High-energy-efficiency mixed relay transmission method based on time delay limited service

Abstract

The invention provides a high-energy-efficiency mixed relay transmission method based on a time delay limited service, and is applied to a wireless relay cooperative system. Two information source nodes exchange information through an amplification transferring relay node; information of the node with a relatively large amount of information to be transmitted is classified into two parts according to a bit number; one part of information amount is equal to or smaller than the information amount of the node with a relatively small amount of information to be transmitted; the two information source nodes respectively transmit an equal amount of information by adopting a bidirectional relay transmission mode; the second part of residual information of the node with the relatively large amount of information to be transmitted is transmitted through a unidirectional relay transmission mode; and during transmission, optimal transmission time lengths of the unidirectional relay transmission state and the bidirectional relay transmission stage are determined by a typical convex optimization method. According to the method, the advantage that the bidirectional relay is high in energy efficiency in the scene of equal bidirectional data amount and the advantage that the unidirectional relay is high in energy efficiency in the scene of unequal bidirectional data amount are used, so that the energy efficiency of a wireless system can be improved greatly.

Description

technical field [0001] The invention belongs to the field of mobile communication and wireless communication, relates to a relay cooperation system, in particular to a high-energy-efficiency hybrid relay transmission method applied to delay-limited services. Background technique [0002] In recent years, with the rapid development of wireless communications, the carbon emissions generated by wireless systems have increased year by year, and at the same time, their operating costs have also increased significantly. Therefore, while pursuing high spectrum efficiency, people pay more and more attention to the energy efficiency of wireless systems. [0003] Energy efficiency is usually defined as the number of bits that can be transmitted per unit of energy consumed. When calculating energy efficiency, not only the energy consumed to send information bits, but also the training signaling of the wireless system and the power generated by the circuit should also be considered. en...

AI Technical Summary

Problems solved by technology

When the amount of data to be transmitted in the two directions is the same, the energy efficiency of the two-way relay is always better than that of the one-way relay, but when the amount of data to be transmitted in the two directions is quite different, the energy efficiency of the one-way relay may be better than two-way relay

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