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This paper proposes a Multi-hop Radio Access Cellular (MRAC) scheme for achieving both highspeed/high-capacity and good area coverage in fourth generation mobile communications systems. In this scheme, we assume two kinds of hop stations, one is a dedicated repeater station installed at a good propagation location such as a rooftop, and the other is a user(More)
In this paper, we introduce a new approach to the minimum energy routing (MER) for next generation (NG) multihop wireless networks. We remove the widely used assumption of deterministic, distance-based channel model is removed, and analyze the potentials of MER within the context of the realistic channel model, accounting for shadowing and fading. Rather(More)
NTT DoCoMo is conducting research on the fourth-generation (4G) mobile communication system. This article outlines the technical issues involved in establishing such a system taking into consideration the capability and performance expected from future mobile communication systems. It also overviews the system configuration and discusses activities related(More)
Figure 1 shows the generations of mobile systems and their application areas from the viewpoints of transmission bit rate and their deployment areas. As the figure shows, the milestones achieved in mobile communications aim at faster bit rates and wider service areas. The 3G system achieves a maximum bit rate of 2 Mb/s and will offer packet-switched(More)
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