Experiment of asynchronous multiplexing scheme with hunting-free frames

Application of multipled block codes (MBCs) for realizing new flexible and efficient asynchronous multiplexing with hunting-free frames is investigated. First, the principles of MBC are overviewed to show the capacities of filterless clock recovery. Then it is shown that modification of simple frame structure of MBC line code can be used for attaining hunting-free reframing for multiplexing systems. Two types of MBCs are developed to this end. While the one uses header blocks for hunting-free reframing, the other uses no headers. Finally, the feasibility of using MBC formats for hunting-free reframing and asynchronous multiplexing is investigated in an experimental system.