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We propose a dynamic logical macro-cell to support fast movers in a wireless mobile multimedia access network. The network assumes a micro-cell structure, and uses passive optical network (PON) technology for fiber distribution to the radio cells. The broadcast functionality of PON together with IP multicast is used to construct the logical macro-cells. Evaluation of static and dynamic logical macro-cells show that the dynamic macro-cell uses resources efficiently, and relaxes the response time for handovers, at the expense of a slight increase in signaling transactions and IP multicast group updates.