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        Quasi-distributed Interference Coordination for HSPA HetNet

        Chi Zhang,장용구,Shuqi Qin,Dacheng Yang 한국전자통신연구원 2014 ETRI Journal Vol.36 No.1

        The heterogeneous network (HetNet) has been discussedin detail in the Long-Term Evolution (LTE) and LTEAdvanced standards. However, the standardization ofHigh-Speed Packet Access HetNet (HSPA HetNet)launched by 3GPP is pushing at full steam. Interferencecoordination (IC), which is responsible for dealing withthe interference in the system, remains a subject worthy ofinvestigation in regard to HSPA HetNet. In this paper,considering the network framework of HSPA HetNet, wepropose a quasi-distributed IC (QDIC) scheme to lowerthe interference level in the co-channel HSPA HetNet. OurQDIC scheme is constructed as slightly different energyefficientnon-cooperative games in the downlink (DL) anduplink (UL) scenarios, respectively. The existence anduniqueness of the equilibrium for these games are firstrevealed. Then, we derive the closed-form best responsesof these games. A feasible implementation is finallydeveloped to achieve our QDIC scheme in the practicalDL and UL. Simulation results show the notable benefitsof our scheme, which can indeed control the interferencelevel and enhance the system performance.

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