LTE-A異構(gòu)網(wǎng)eICIC技術(shù)研究
[Abstract]:With the rapid development of mobile Internet and the rapid growth of urban population, more and more communication hot areas and communication blind areas will be formed in the region. Using traditional Acer stations to "blind" and "heat compensation" is not only expensive, but also has strong interference with existing base stations. The purpose of introducing Pico into LTE-A is to "supplement blindness" and "heat supply", in which the "heating up" Pico is not able to achieve the purpose of "heating up" because of the strong interference of Acer station resulting in very few access users. Cell area expansion technology enables more users to access Pico, but the channel quality is poor and throughput is low in the Pico extension area. Based on this, time domain eICIC technology and power control technology are studied in this paper. In this paper, the key technologies of LTE-A heterogeneous network are introduced, and the interference scene and eICIC technology of LTE-A heterogeneous network are analyzed. Then, the LP-ABS (low power subframe) technique in time domain eICIC is introduced, and simulation analysis is made for the influence of different parameters on its performance. On this basis, In this paper, the adaptive LP-ABS algorithm based on LP-ABS sub-frame configuration ratio and configuration power adaptive (LP-ABS) algorithm is studied. At each simulation time, each sector is dynamically aligned according to the proportion of users accessing the Pico within the sector and the interference situation. The configuration ratio and configuration power of LP-ABS subframes are adjusted, The simulation results show that the adaptive LP-ABS algorithm not only alleviates the strong interference of the macro base station to Pico, but also effectively improves the user fairness and communication stability in the sector. Finally, based on the analysis of the advantages and disadvantages of the adaptive LP-ABS algorithm, the eICIC algorithm based on LP-ABS and power control is studied, including the Pico joint power control algorithm in the same sector and the modified adaptive LP-ABS algorithm based on the Pico user protection in the near sector macro base station. The simulation results show that although the proposed algorithm can reduce the throughput of users in Acer stations and the throughput of users with good Pico channel quality to some extent, However, the throughput of users with poor Pico channel quality is improved, and the user fairness and communication stability in the sector are improved.
【學(xué)位授予單位】:西安電子科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TN929.5
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