Simulation Study of Fractional Frequency Reuse for Mobile WiMAX

Zhou, Yuefeng; Zein, N.F.

doi:10.1109/vetecs.2008.569

Cited by 23 publications

(10 citation statements)

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“…Fractional frequency reuse with 1/1 and 1/3 are also analyzed in this work. Zhou and Zein [10] have also analyzed the advantages of fractional frequency reuse system in attaining throughput and coverage. By availing more frequency reuse zones in the system, zone selection can be optimized such that interference effects are minimized.…”

Section: Motivation and Previous Workmentioning

confidence: 99%

Analysis of Frequency Reuse and Throughput Enhancement in WiMAX Systems

Roy

Vaidehi

2010

Wireless Pers Commun

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The WiMAX (IEEE 802.16e-2005) standard supports fractional frequency reuse concept. To implement this idea, the WiMAX standard has proposed the concept of zones where different frequency reuse factors (FRFs) are employed. Here, each cell/cluster operates with multiple zones where different FRFs are used. The zone of operation for each user can be either permanently fixed or determined dynamically. The dynamic assignment of the zone can potentially utilize the bandwidth efficiently and improve the system throughput. Dynamic zone selection schemes based on the two metrics namely radio distance and bandwidth efficiency are proposed in this paper. The impact of the dynamic zone selection scheme on throughput is studied and compared with the fixed reuse zone schemes.

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Section: Motivation and Previous Workmentioning

confidence: 99%

Analysis of Frequency Reuse and Throughput Enhancement in WiMAX Systems

Roy

Vaidehi

2010

Wireless Pers Commun

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“…Generally, the performances of FFR are evaluated by Monte Carlo simulations and/or empirical measurements [8,[11][12][13]. A recent contribution [14] has tackled the problem by following an analytical approach, however using some simplifying assumptions (very basic power control at the AP, no shadowing effect).…”

Section: Introductionmentioning

confidence: 99%

“…In particular, we examine how the UT should be assigned to the FFR band, based on its channel gain. Unlike other studies that assume a fixed shadowing standard deviation (see e.g., [11,13], where σ dB = 8 dB), we consider it as a variable parameter (σ dB ∈ [ 0, 10] dB) in order to accurately analyze its influence on the performances of FFR.…”

Section: Introductionmentioning

confidence: 99%

An accurate performance analysis of an FFR scheme in the downlink of cellular systems under large-shadowing effect

Pijcke

Gazalet

Zwingelstein-Colin

et al. 2013

J Wireless Com Network

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We address the problem of analyzing the performances of interference-limited cellular networks in large-scale shadowing environments. Focusing on the fractional frequency reuse (FFR) framework, we examine how to optimally assign mobile users in a cell either to the full frequency reuse part or to the orthogonal part of the FFR band. Instead of using traditional Monte Carlo simulations, which do not provide sufficiently accurate results under important shadowing, we propose a fast and accurate numerical method. We consider a fast-fading environment and we use the ergodic capacity as the performance measure. Applying a distributed power control and scheduling strategy, we examine both cases where access points have knowledge of partial-or full-channel state information (CSI); for the latter, we also propose an approximated waterfilling strategy. The interest of our method lies in the fact that it allows for a fast and accurate analysis of the performances of FFR. In addition, it takes into account a broad range of shadowing environments.

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“…In [12] and [16], FFR comprising a mix of FR(1) and FR(3) was studied in the context of WiMAX, and was found to provide better throughput than FR(3) and better coverage than FR(1). In [15], the authors propose an Enhance FFR (EFFR) scheme that improves overall cell throughput over previous schemes such as SFR.…”

Section: Introductionmentioning

confidence: 99%

On fractional frequency reuse in imperfect cellular grids

Mitran

Rosenberg

2012

2012 IEEE Wireless Communications and Networking Conference (WCNC)

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Abstract-Current point-to-multipoint systems suffer significant performance losses due to greater attenuation along the signal propagation path at higher frequencies, transmit power constraints of mobile users and base stations, and interference from neighboring cells. Fractional Frequency Reuse (FFR) is a technique to counteract these effects. Typically, the proposed FFR technique partitions a cell into a reuse 1 area, centered near the base-station and a reuse 3 area, located near the edges of the cell, with reuse 3 regions scheduled to minimize interference from neighboring cells. Unfortunately, virtually all analysis of FFR has been done under a perfect hexagonal lattice cellular grid, while no practical deployment has this degree of symmetry. In this paper we revisit the analysis of FFR for non-ideal cellular grids for cases with fading. We find that while for some non-ideal grids, a combination of reuse 1 and 3 is indeed optimal, for many others a combination of reuse 1 and 4 provide better performance. Thus, we conclude that for practical cellular layouts, the optimal re-use pattern for the edge of the cells is not necessarily 3 as commonly assumed, but is topology dependent.

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Simulation Study of Fractional Frequency Reuse for Mobile WiMAX

Cited by 23 publications

References 0 publications

Analysis of Frequency Reuse and Throughput Enhancement in WiMAX Systems

Analysis of Frequency Reuse and Throughput Enhancement in WiMAX Systems

An accurate performance analysis of an FFR scheme in the downlink of cellular systems under large-shadowing effect

On fractional frequency reuse in imperfect cellular grids

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