Handover and congestion relief in MM-MAN; Mobile Multimedia Metropolitan Area Network

This paper presents the capability and challenge of a unified micro-cell-based network named MM-MAN (Mobile Multimedia Metropolitan Area Network) in providing multimedia communications to the fast terminals like those on vehicle-move. Micro-cellular network can offer rich radio resources due to high reusability of radio resource in space domain, and however, drags two major drawbacks for full scale mobility on surface; disturbance of smooth packet transfer to fast terminals due to the frequent handover and local traffic sensitivity triggering congestion. The authors have already proposed MM-MAN with the capability of maintaining smooth packet transfer to fast terminals in spite of frequent cell-to-cell move and also presented conceptual solutions for the local congestions. This paper presents a method to liberate this local congestion meanwhile still allowing high-bit rate packet transfer to fast moving terminals on network along cascaded micro-cells with Pico-cells. By the numerical analysis, we realize that the number of MTs served in the micro-cell increases 1.5 times if a Pico-cell is added.