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The Long Term Evolution (LTE) is a new radio access technology (RAT) which is currently being deployed on top of the second generation (2G) or third generation (3G) mobile networks. As a result, user equipments (UEs) will be handed over from one RAT to another. To improve the robustness of the inter-RAT handovers and reduce cost, self-organizing networks (SONs) are used to configure the inter-RAT...
First, the deployment of the Long-Term Evolution (LTE) system will be concentrated on areas with high user traffic overlaying with the legacy second-generation (2G) or third-generation (3G) mobile system. Consequently, the limited LTE coverage will result in many inter-radio access technology (RAT) handovers from LTE to 3G systems and vice versa. Trouble-free operation of inter-RAT handovers requires...
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