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Although the widespread deployment of cellular networks guarantees mobility in large ranges, it cannot completely support multimedia data. Similarly, although the explosive growth of WLANs provides the convenience of wireless with high bandwidth, it lacks large range support. Thus, in this paper, the authors propose a new approach, ABC2, for seamless mobility such that their approach provides both high bandwidth and large ranges. ABC2 will provide not only an "Always Best Connected" but also an "Always Best Complemented" interworking architecture between cellular networks and WLANs.
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