A Tractable Model for Noncoherent Joint-Transmission Base Station Cooperation

Tanbourgi, Ralph; Singh, Surinder; Andrews, Jeffrey G.; Jondral, Friedrich K.

doi:10.1109/twc.2014.2340860

Cited by 179 publications

(159 citation statements)

References 33 publications

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“…Base on the previous analysis, the approximation of cumulative distribution function (CDF) of SINR can be derived with the familiar form in ( [26], Corollary1)…”

Section: Optimal Radiusmentioning

confidence: 99%

Fuzzy Logic-based Virtual Cell Design in Ultra-Dense Networks

Liu

Chuai

Gao

et al. 2018

J Wireless Com Network

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One of the main trends in the fifth generation (5G) cellular network is the bifurcation of systems that enable network densification. With this trend, ultra-dense networks (UDN) become a pillar technology to provide high data rates gains. However, these gains come at the expense of more complex interference and higher handover frequency. The user-centric virtual cell conception has been proposed to solve these problems. But it still has encountered some challenges in practical application. In this paper, we propose a fuzzy logic-based virtual cell design to balance data rates and resource overhead in order to improve virtual cell applicability. In our design, we consider a practical UDN scenario with imperfect channel state information (CSI) feedback and model it by stochastic geometry theory. Then, we find the optimal radius of virtual cells by maximizing the system spectral efficiency. On the basis, we propose a fuzzy logic-based activation strategy selection (FASS) algorithm to rationally choose the virtual cell activation threshold and resources allocation scheme under different traffic loads and quality of service (QoS) requirement. Simulation results demonstrate that the proposed solution can effectively eliminate the interference, obviously improve the user's system spectral efficiency and dynamically adapt to different traffic loads.

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“…Base on the previous analysis, the approximation of cumulative distribution function (CDF) of SINR can be derived with the familiar form in ( [26], Corollary1)…”

Section: Optimal Radiusmentioning

confidence: 99%

Fuzzy Logic-based Virtual Cell Design in Ultra-Dense Networks

Liu

Chuai

Gao

et al. 2018

J Wireless Com Network

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“…In [13], the authors considered various indoor and outdoor propagation environments for a HetNet, and a heuristic algorithm for the power allocation at the tiered cells was also developed. In addition, this random spatial model in [11] has been further extended to many scenarios of interest for HetNets, such as user association [14][15][16], fractional frequency reuse [17,18], CoMP transmission [19][20][21][22][23], and so on. As mentioned above, the gains from load balancing through CRE user association should be guaranteed by suitable enhanced inter-cell interference coordination (eICIC) techniques [24].…”

Section: Related Workmentioning

confidence: 99%

“…Accordingly, [19][20][21][22][23] extended the PPP model to capture the performance of the HetNets by deploying CoMP transmission. The authors in [19] analyzed the coverage probability for CoMP transmission in HetNets, for which the set of cooperating BSs was determined.…”

Section: Related Workmentioning

confidence: 99%

“…Moreover, the dirty paper coding (DPC) orthogonal transmission was also adopted to tackle the intra-cell interference for the cooperating pair. The authors in [22] presented a tractable model for analyzing non-coherent joint-transmission BS cooperation under user-centric BS clustering and channel-dependent cooperation activation. Further, the authors in [23] proposed a location-aware cross-tier BS cooperation scheme, and evaluated the performance in terms of the outage probability and the achievable average rate.…”

Section: Related Workmentioning

confidence: 99%

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Coverage and Rate Analysis for Location-Aware Cross-Tier Cooperation in Two-Tier HetNets

Guo

Cong

2017

Symmetry

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Heterogeneous networks (HetNets) are regarded as a promising approach to handle the deluge of mobile data traffic. With the co-channel deployment of small cells, the coverage and capacity of the network will be improved. However, the conventional maximum-received-power (MRP) user association scheme and cross-tier interference issue significantly diminish the performance gain provided by small cells. In this paper, we propose a novel location-aware cross-tier cooperation (LA-CTC) scheme for jointly achieving load balancing and interference mitigation in two-tier HetNets. In detail, we define an inner region for each macro base station (MBS) where the femto base stations (FBSs) will be deactivated, and thereby the users within the inner region will only be served by the MBS. Subsequently, for the users located in the outer region, the proposed scheme only uses coordinated multipoint (CoMP) transmission by two tiers of BSs to eliminate the excessive cross-tier interference suffered by offloaded users, whereas users with good locations are served directly by either a MBS or a FBS. Using tools of stochastic geometry, we derived the analytical expressions for the coverage probability and average rate of a randomly chosen user. Meanwhile, the analytical results were validated through Monte Carlo simulations. The numerical results show that the proposed scheme can improve the performance of networks significantly. Moreover, we compare the performance of the proposed scheme with that of the conventional MRP scheme, the cell range expansion (CRE) scheme and the location-aware cross-tier CoMP transmission (LA-CTCT) scheme in the literature. Numerical comparisons revealed that the proposed LA-CTC scheme outperforms the other three schemes.

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“…If these strict requirements can be satisfied, coherent joint transmission achieves better performance. Otherwise, non-coherent joint transmission is more preferable, especially, in lightly-loaded scenarios [5]. Due to its low complexity and requirement, BS non-coherent joint transmission in large-scale HetNets has been widely considered and extensively studied using some effective tools from stochastic geometry [7]- [11].…”

Section: Introductionmentioning

confidence: 99%

Random caching based cooperative transmission in heterogeneous wireless networks

Wen

Cui

Zheng

et al. 2017

2017 IEEE International Conference on Communications (ICC)

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Base station cooperation in heterogeneous wireless networks (HetNets) is a promising approach to improve the network performance, but it also imposes a significant challenge on backhaul. On the other hand, caching at small base stations (SBSs) is considered as an efficient way to reduce backhaul load in HetNets. In this paper, we jointly consider SBS caching and cooperation in a downlink largescale HetNet. We propose two SBS cooperative transmission schemes under random caching at SBSs with the caching distribution as a design parameter. Using tools from stochastic geometry and adopting appropriate integral transformations, we first derive a tractable expression for the successful transmission probability under each scheme. Then, under each scheme, we consider the successful transmission probability maximization by optimizing the caching distribution, which is a challenging optimization problem with a non-convex objective function. By exploring optimality properties and using optimization techniques, under each scheme, we obtain a local optimal solution in the general case and global optimal solutions in some special cases. Compared with some existing caching designs in the literature, e.g., the most popular caching, the i.i.d. caching and the uniform caching, the optimal random caching under each scheme achieves better successful transmission probability performance. The analysis and optimization results provide valuable design insights for practical HetNets.

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A Tractable Model for Noncoherent Joint-Transmission Base Station Cooperation

Cited by 179 publications

References 33 publications

Fuzzy Logic-based Virtual Cell Design in Ultra-Dense Networks

Fuzzy Logic-based Virtual Cell Design in Ultra-Dense Networks

Coverage and Rate Analysis for Location-Aware Cross-Tier Cooperation in Two-Tier HetNets

Random caching based cooperative transmission in heterogeneous wireless networks

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