A Scheduling Algorithm for Low Jitter in EthernetBased Fronthaul Due to the low cost, high bandwidth and compatibility of Ethernet, Ethernetbased fronthaul has been utilized to carry sampled radio frequency (RF) signals from radio equipment (RE) to the radio equipment controller (REC). Meeting the stringent performance requirements regarding jitter for the Common Public Radio Interface (CPRI) over Ethernet is challenging. In this paper, a time division multiplexing (TDM) slotbased scheduling (TSS) algorithm is proposed to minimize the jitter; this algorithm consists of two main modules: slot greedy allocation and lowdelay collaboration. Specifically, lowcomplexity slot greedy allocation aims to solve the NPhard problem caused by the optimal slot allocation, and the lowdelay collaboration among different switches is employed to avoid the large delays caused by a strict slot assignment. In the Ethernetbased fronthaul network, the simulation results demonstrate that, compared with the conventional benchmark algorithm, the TSS algorithm ensures lower jitter, and this significant decrease is achieved without incurring a large delay.

Improving Latency and Jitter Performance in CDMABased NextGeneration Ethernet Passive Optical Networks for 5G Applications In this paper, we propose new scheduling algorithms to improve the performance of the code division multiple access (CDMA) enabled next generation Ethernet passive optical networks (NG EPON). In the NGEPON standard, stringent requirements are applied to the packet delay. In addition, lowering the endtoend latencyjitter will be instrumental in the realization of future 5G applications. For this reason, we propose two new scheduling algorithms for NGEPON to assign a grant size on each upstream code in order to guarantee the newly required network throughput and latency performance of 5G systems. Results show that both newly proposed scheduling schemes can significantly improve the network performance in terms of delayJitter and throughput. In addition, the results are compared to numerous dynamic wavelength and bandwidth allocation (DWBA) algorithms. It is shown that CDMA can be a good alternative for WDM for multichannels based NGEPON. Also, it is shown that the proposed algorithms can reach a high capacity and a very low latencyjitter to accommodate 5G services.