Coordination(eICIC)inLTEHetNets分析.PDFVIP

1 Algorithms for Enhanced Inter Cell Interference Coordination (eICIC) in LTE HetNets Supratim Deb, Pantelis Monogioudis, Jerzy Miernik, James P. Seymour Abstract—The success of LTE Heterogeneous Networks (Het- Nets) with macro cells and pico cells critically depends on efficient spectrum sharing between high-power macros and low- power picos. Two important challenges in this context are, (i) determining the amount of radio resources that macro cells should offer to pico cells, and (ii) determining the association rules that decide which UEs should associate with picos. In this paper, we develop a novel algorithm to solve these two coupled problems in a joint manner. Our algorithm has provable guarantee, and furthermore, it accounts for network topology, traffic load, and macro-pico interference map. Our solution is Fig. 1. A typical LTE HetNet architecture with Macro and Pico access standard compliant and can be implemented using the notion of nodes. Pico-1 is used for throughput enhancement in a possible traffic hotspot location, Pico-2 and Pico-3 are used for improving edge throughput. Almost Blank Subframes (ABS) and Cell Selection Bias (CSB) proposed by LTE standards. We also show extensive evaluations using RF plan from a real network and discuss SON based eICIC are deployed for blanket coverage of urban, suburban, or implementation. rural areas; whereas, the pico nodes with small RF coverage Index Terms—4G