A distributed dynamic spectrum access and power allocation algorithm for Femtocell networks

Su, Qinliang; Huango, Aiping; Wu, Zhouyun; Yu, Guanding; Zhang, Zhaoyang; Xu, Kai; Jin, Yang

doi:10.1109/wcsp.2009.5371629

Cited by 24 publications

(12 citation statements)

References 7 publications

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“…is the penetration loss through external walls, generally assumed to be 15dB [9]; is the number of penetrated walls. Using an intratier interference mitigation scheme among femtocells (see next section) we can assume ≥ 2 for the path loss .…”

Section: Path Loss Modelmentioning

confidence: 99%

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Uplink Interference Mitigation for OFDMA Femtocell Networks

Sun

Jover

Wang

2012

IEEE Trans. Wireless Commun.

114

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Femtocell networks, consisting of a conventional macro cellular deployment and overlaying femtocells, forming a hierarchical cell structure, constitute an attractive solution to improving the macrocell capacity and coverage. However, the inter-and intra-tier interferences in such systems can significantly reduce the capacity and cause an unacceptably high level of outage. This paper treats the uplink interference problem in orthogonal frequency-division multiple-access (OFDMA)-based femtocell networks with partial cochannel deployment. We first propose an inter-tier interference mitigation strategy without the femtocell users power control by forcing the femto-interfering macrocell users to use only some dedicated subcarriers. The noninterfering macrocell users, on the other hand, can use either the dedicated subcarriers, or the shared subcarriers which are also used by the femtocell users. We then propose subcarrier allocation schemes based on the auction algorithm for macrocell users and femtocell users, respectively, to independently mitigate the intra-tier interference. The proposed interference mitigation scheme for femtocell networks offers significant performance improvement over the existing methods by substantially reducing the inter-and intra-tier inferences in the system.

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Section: Path Loss Modelmentioning

confidence: 99%

“…Specifically, downlink power control for the FAPs is treated in [7]- [9]; and uplink power control for the femtocell users (FUs) is discussed in [10]- [15]. A distributed channel assignment algorithm for mitigating interference among femtocells is given in [16] without considering the interference from FUs to the MBS.…”

Section: Introductionmentioning

confidence: 99%

Uplink Interference Mitigation for OFDMA Femtocell Networks

Sun

Jover

Wang

2012

IEEE Trans. Wireless Commun.

114

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“…To adapt to the varying system conditions, this assignment is supposed to be performed in long-time scale using, one of the already proposed methods (e.g. [7]). After applying sub-channel assignment, sub-channel allocation to users is performed within each LTE sub-frame (i.e.…”

Section: Test Cases For Femtocellsmentioning

confidence: 99%

Interference management in heterogeneous wireless networks based on context information

Kliks

Nasreddine

et al. 2012

2012 International Symposium on Wireless Communication Systems (ISWCS)

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Femtocells and WiFi have been considered as viable concepts in cellular networks to increase overall system capacity. Critical functionalities for the successful integration of such technologies in macro-cellular topologies are related to radio resource allocation and interference management techniques that must ensure seamless intra-cell and inter-cell interoperation among macro-and femto users, as well as between cellular and WiFi users. In this paper, various interference management approaches using rich context information are proposed and discussed for various scenarios of interest, along with a specific assessment for co-channel access points deployment in cellular networks

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“…There are very few studies that look into the power loading issue together with resource allocation for femtocells [7][8][9]. In [7], an iterative method is used to minimize the interference, in which, at every iteration, numerous information needs to be exchanged between the macro BS and femto BSs and the subgradient method is also needed to optimize the system throughput, which results in higher complexity and huge overhead.…”

Section: Introductionmentioning

confidence: 99%

Power Loading and Resource Allocation for Femtocells

Cao

Fan

2011

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)

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In this paper, we study power loading and resource allocation for OFDM-based femtocell networks. To mitigate the interference to the macrocell from the femtocell, interference constraints have to be applied for power loading in the femtocell. Taking the interference constraints into account, we propose an iterative water filling algorithm to improve the system performance. The proposed algorithm is further developed with a proportional fair scheduling algorithm to maintain the fairness among the femto users. Simulation results are given to support the advantages of the proposed solution, showing that more than 60% capacity gain at -8dB SNR and 5% gain at 6dB can be achieved.

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A distributed dynamic spectrum access and power allocation algorithm for Femtocell networks

Cited by 24 publications

References 7 publications

Uplink Interference Mitigation for OFDMA Femtocell Networks

Uplink Interference Mitigation for OFDMA Femtocell Networks

Interference management in heterogeneous wireless networks based on context information

Power Loading and Resource Allocation for Femtocells

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