Interference cancellation for spectrum shared femtocell networks with macrocell information feedback

Ndong, Massa; Fujii, Takeo

doi:10.1109/icufn.2011.5949166

Cited by 3 publications

(6 citation statements)

References 10 publications

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“…At high SIRs, the combined proposals leads to a similar maximum throughput for both HUE and MUE singly w.r.t to the power reduction due to the proposed power control affecting the HUE. Further analysis and results van be found in [8]. …”

Section: Performance Assessment Through Simulationsmentioning

confidence: 97%

“…In this part, we provide an extension to [8] considering the variation of the HUE's position and a general analysis. We propose a general analysis of our proposed interference cancellation with multiple interfering MUEs and one HUE transmitting the symbol X I on the channel with fading coef ficient h I .…”

Section: Proposed Interference Cancellation At the Henbmentioning

confidence: 99%

“…The analysis is similar for dDconv and dDproposed considering the bit error rate in 4. Our simulation uses the packet error rate to estimate the throughput denoted by T as derived in [8] :…”

Section: Performance Assessment Through Simulationsmentioning

confidence: 99%

“…Therein, the traffics from both the transport and the radio layer are jointly used to optimize the overall network throughput. The proposed interference cancellation in this paper extends the interference cancellation using infrastructure network in [8] by stating the transmit power and position of each terminal. These parameters are used to derive further analysis and to propose the mitigation of the interference coming from both tiers.…”

Section: Introductionmentioning

confidence: 99%

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Cross-tier interference mitigation for self organized-self optimized femtocells

Ndong

Fujii

2012

Wireless Telecommunications Symposium 2012

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Maximizing frequency reuse is of high interest to multi-tier wireless cellular networks. The coexistence of macrocell and femtocell requires advanced cross-tier interference mitigation to satisfy the spectral efficiency sought for the evolution of cellular networks. In this paper, our proposal combines an opportunistic cancellation of the interference at the base station of the femtocell(HeNB) which mitigates dead zone occurrences at the femtocell premises in closed access regime, and a transmit power limitation on the femtocell mobile user for interference avoidance at the base station of the macro cell. Our proposed com bination profits from the network infrastructure where successive interference cancellation does not apply, and neighbor discovery enabled at the HeNBs. Through simulation results and analysis, our proposal improves the underlay network performance with implementation of a self organized-self optimized network. I1Idex Terms-Macrocell, femtocell, two-tier networks MMSE Cross-tier interference mitigation, power control, SON ' ,

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Section: Performance Assessment Through Simulationsmentioning

confidence: 97%

Section: Proposed Interference Cancellation At the Henbmentioning

confidence: 99%

Section: Performance Assessment Through Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cross-tier interference mitigation for self organized-self optimized femtocells

Ndong

Fujii

2012

Wireless Telecommunications Symposium 2012

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“…A distributed femtocell power allocation scheme is proposed in [18] by exploiting limited channel information of neighboring macro MSs to effectively reduces cross-tier interference on them. Ndong et al [19] addressed the uplink cross-tier interference problem and proposes a resilient solution to the near-far effect issue by utilizing the interfering macrocell information feedback through infrastructure network at the HeNB for interfered signal recovery of the symbols sent by the HUE. A self-organizing femtocell framework which is composed of three complementary control loops for co-channel deployment is presented in [20].…”

Section: Related Studymentioning

confidence: 99%

Hybrid spectrum arrangement and interference mitigation for coexistence between LTE macrocellular and femtocell networks

Bai

Chen²

2013

J Wireless Com Network

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When deploying two-tier LTE cellular networks with coexistence of macrocells and underlaid femtocells, the strategies of spectrum arrangement need to be investigated to efficiently utilize the scarce spectrum resource. Co-channel spectrum usage and dedicated-channel spectrum usage are two traditional strategies of spectrum arrangement. Nevertheless, there are pros and cons of them from the perspective of achievable network capacity in two-tier LTE network as they result in different amounts of available spectrum at each tier and disparate cross-tier interferences. To improve overall spectrum utilization, we propose a novel approach of spectrum arrangement, which is called hybrid spectrum arrangement, to take advantage of their merits. In our proposal, an underlaid femtocell can select its spectrum usage mode according to a criterion aiming to benefit both macrocell and femtocell in terms of achieved capacities. Consequently, the femtocells embedded in macrocell are self-organized as inner and outer femtocells, which operate in dedicated-channel spectrum usage and co-channel spectrum usage, respectively. Then, we examine distinct characteristics of cross-tier interferences in the context of hybrid spectrum arrangement and present corresponding schemes to mitigate the residual significant interferences. Analysis and system level simulation are given to validate the effectiveness of our proposed methods for two-tier LTE cellular network.

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