Throughput and power management of access link DF type I relay nodes for LTE-A networks and beyond

The decode-and-forward (DF) relay based cellular network is considered an efficient technique for solving the coverage and improving system capacity of the current fourth-generation (4G) and the emerging fifth-generation (5G) mobile telecommunication technologies. In this analysis, we control the codeword's transmission parameters by achieving a good trade-off between setting more resources with changing the modulation order, hence reducing the relay's access link transmitted power. We first address the calculations of codeword's size in 3GPP specification, where an unhealthy component carrier selection mechanism is introduced for defining relay's transmission spectrum. Then, we present a novel 3GPP-compliant binary integer optimization model subject to several practical constraints, such as the requisite resources and throughput. Through system level simulations, the proposed approach is compared with the conventional relaying systems. It is shown that our approach has made several improvements to the conventional schemes.