Abstract
The evolution of communication networks has made network system increasingly enormous and complex in recent years. Inter-cell interference (ICI) in the denser network will degrade the throughput and affect the Signal-to-Interference-plus-Noise Ratio in the Long Term Evolution (LTE) network. Assigning the Physical Cell ID (PCI) to cells in a proper way is effective to reduce ICI in the downlink network. In this work, the aim is to consider PCI collision, confusion and Reference Signal Collision (CRS) between neighbor cells comprehensively. For the purpose, a local search algorithm is proposed and its time complexity is O(Km3n3) in the worst case. Compared with the random plan, numerical results of simulation experiment demonstrate the effectiveness and advantage of local search.
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