Coordinated multipoint transmission/reception techniques for LTE-advanced [Coordinated and Distributed MIMO

Sawahashi, Mamoru; Kishiyama, Yoshihisa; Morimoto, Akihito; Nishikawa, Daisuke; Tanno, Motohiro

doi:10.1109/mwc.2010.5490976

Cited by 582 publications

(340 citation statements)

References 4 publications

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“…However, when aiming for supporting Gigabittransmissions, which is the ambitious goal of LTE-A standard [2], the high-rate fibre-based backhaul may suffer from the detrimental effects of both dispersion and nonlinearity [34]. Since our MR-FFR-DAS scheme still relies on centralized signal processing 4 at the BS, where the signals are received from the RAs via optical fibre links, these signals may be contaminated both by the fibre's dispersion and by its nonlinearity. Fortunately, these degradations may be effectively mitigated by using the fibre soliton [35], [36].…”

Section: Roaming Randomlymentioning

confidence: 99%

Is the Low-Complexity Mobile-Relay-Aided FFR-DAS Capable of Outperforming the High-Complexity CoMP?

Yang

Alanis

et al. 2016

IEEE Trans. Veh. Technol.

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Abstract-Coordinated multi-point transmission/reception aided collocated antenna system (CoMP-CAS) and mobile relay assisted fractional frequency reuse distributed antenna system (MR-FFR-DAS) constitute a pair of virtual-MIMO based technical options for achieving high spectral efficiency in interference-limited cellular networks. In practice both techniques have their respective pros and cons, which are studied in this paper by evaluating the achievable cell-edge performance on the uplink of multicell systems. We show that assuming the same antenna configuration in both networks, the maximum available cooperative spatial diversity inherent in the MR-FFR-DAS is lower than that of the CoMP-CAS. However, when the cell-edge MSs have a low transmission power, the lower-complexity MR-FFR-DAS relying on the simple single-cell processing may outperform the CoMP-CAS by using the proposed soft-combining based probabilistic data association (SC-PDA) receiver, despite the fact that the latter scheme is more complex and incurs a higher cooperation overhead. Furthermore, the benefits of the SC-PDA receiver may be enhanced by properly selecting the MRs' positions. Additionally, we show that the performance of the cell-edge MSs roaming near the angular direction halfway between two adjacent RAs (i.e. the "worst-case direction") of the MR-FFR-DAS may be more significantly improved than that of the cell-edge MSs of other directions by using multiuser power control, which also improves the fairness amongst cell-edge MSs. Our simulation results show that given a moderate MS transmit power, the proposed MR-FFR-DAS architecture employing the SC-PDA receiver is capable of achieving significantly better bit-error rate (BER) and effective throughput across the entire cell-edge area, including even the worst-case direction and the cell-edge boundary, than the CoMP-CAS architecture.Index Terms-Base station cooperation, coordinated multipoint (CoMP), fractional frequency reuse, distributed antenna system (DAS), multicell uplink, mobile relay.

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Section: Roaming Randomlymentioning

confidence: 99%

Is the Low-Complexity Mobile-Relay-Aided FFR-DAS Capable of Outperforming the High-Complexity CoMP?

Yang

Alanis

et al. 2016

IEEE Trans. Veh. Technol.

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“…A- (1) For N = i, the probability that Similarly, for the resource utilization of JT call, it is obtained as below…”

Section: Appendixmentioning

confidence: 99%

“…In particular, coordinated multi-point transmission (CoMP) can utilize multiple base stations (BSs) to achieve the spectral efficiency requirements for LTE-Advanced system [1] .…”

Section: ⅰ Introductionmentioning

confidence: 99%

Analysis of Call Admission Control for Joint Transmission-Based LTE-Advanced Systems

Kim¹,

Lee²,

Ryu³

2013

The Journal of Korea Information and Communications Society

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Coordinated multi-point transmission (CoMP) is considered to be a promising technique to improve the throughput for LTE-Advanced systems. One important approach for CoMP is Joint Transmission (JT). However, the analytical model of JT has not been fully studied, as user equipments (UEs) receiving the desired signals from an adjacent base station (BS) as well as serving BS, or only serving BS were not distinguished. We derive a new analytical model to describe the call admission control in JT based systems. The performance measures of interest are the call blocking probability, and resource utilization. Furthermore, we compare the performance of JT-based systems and non-JT-based systems. The analytical results are in reasonable agreement with the simulation results.

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“…In the colocated scenario, closely-spaced antennas transmit the same information exploiting channel state information (CSI) to maximize the received signal-to-noise ratio (SNR) [8][9][10][11][12]. For the distributed beamforming scenario techniques such as coordinated multipoint (CoMP) joint transmission (JT) have been introduced and incorporated into the practical systems mainly to improve link reliability and data rate of cell-edge users [13][14][15][16][17]. The performance differences between beamforming methods may depend on the proposed limited feedback method, backhaul quality (especially in case of inter-site CoMP) and other implementation factors.…”

Section: Introductionmentioning

confidence: 99%

“…In general, the more there is feedback capacity, the better the link performance, see e.g. [4,5,12,[17][18][19]. The performance degradation due to feedback errors is presented in [20] while [21] shows that it is possible to design efficient codebooks even under imperfect feedback system.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Hierarchically Combined Practical Beamforming Methods

Haile

Hämäläinen

2015

Wireless Pers Commun

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In literature various limited-feedback beamforming methods applied in co-located and distributed antenna systems have been proposed for enhancing wireless link spectral efficiency and reliability. We focus on practical limited-feedback methods and introduce a hierarchical feedback structure, whereby co-located/distributed transmit antennas are organized into two or more groups. To facilitate robust and flexible use of channel state information we apply independent feedback to antenna groups and between the groups. This structure provides additional implementation flexibility under practical constraints, particularly for coordinated multipoint (CoMP) systems. For the presented methods with hierarchical control structure, we compute closed-form expressions for the signal-to-noise power ratio gain, the fading figure and the average bit-error-probability. Although hierarchical structure leads in some cases to suboptimal methods, results show that performance loss against upper bound given by transmitter equal gain combining is negligible even when number of feedback bits is small. Thus, it is concluded that the hierarchical feedback that is robust against errors can be effectively used when antennas form natural groups like in e.g. CoMP transmission.

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Coordinated multipoint transmission/reception techniques for LTE-advanced [Coordinated and Distributed MIMO

Cited by 582 publications

References 4 publications

Is the Low-Complexity Mobile-Relay-Aided FFR-DAS Capable of Outperforming the High-Complexity CoMP?

Is the Low-Complexity Mobile-Relay-Aided FFR-DAS Capable of Outperforming the High-Complexity CoMP?

Analysis of Call Admission Control for Joint Transmission-Based LTE-Advanced Systems

Performance Analysis of Hierarchically Combined Practical Beamforming Methods

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