Effects of Wideband Scheduling and Radio Resource Assignment in OFDMA Radio Access for LTE-Advanced Downlink

This paper presents the effects of applying channel-dependent dynamic scheduling and transport block (TB) assignment that take advantage of a wider transmission bandwidth than that for a component carrier (CC) in OFDMA radio access for the LTE-Advanced downlink At the 3GPP RAN WG1 meeting, independent resource block (RB) assignment of one TB within one CC was adopted. However, gains in dynamic scheduling and TB assignment over a transmission bandwidth wider than that for a CC have not yet been sufficiently investigated, and these are crucial in obtaining target insight which is to be achieved by alternative techniques according to the adopted CC based TB assignment. Hence, we investigate the cell throughput and cell-edge user throughput gains for the three types of channel-dependent dynamic scheduling and TB assignment: TB assignment and dynamic scheduling within one CC, TB assignment within one CC and dynamic scheduling over multiple CCs, and TB assignment and dynamic scheduling over multiple CCs. Then, based on system-level simulation results, we present the comprehensive insights assuming the current working assumption for LTE-Advanced.