Relay Selection and Resource Allocation Schemes for Effective Utilization of Relay Zones in Relay-Based Cellular Networks

Choi, Bum-Gon; Bae, Sueng Jae; Cheon, Kyung-yul; Park, Aesoon; Chung, Min Young

doi:10.1109/lcomm.2011.022411.101831

Cited by 23 publications

(18 citation statements)

References 6 publications

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“…Joint subframe and RB allocation for the Type 1 inband relay network has been studied in [14]- [17]. However, none considers power allocation, even though it is supported in the standard [18].…”

Section: Related Workmentioning

confidence: 99%

Dynamic Joint Resource Optimization for LTE-Advanced Relay Networks

Liang

et al. 2013

IEEE Trans. Wireless Commun.

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Abstract-A dynamic optimization algorithm is proposed for the joint allocation of subframes, resource blocks, and power in the Type 1 inband relaying scheme mandatory in the LTEAdvanced standard. Following the general framework of Lyapunov optimization, we decompose the original problem into three sub-problems in the forms of convex programming, linear programming, and mixed-integer programming. We solve the last sub-problem in the Lagrange dual domain, showing that it has zero duality gap, and that a primal optimum can be obtained with probability one. The proposed algorithm dynamically adapts to traffic and channel fluctuations, it accommodates both instantaneous and average power constraints, and it obtains arbitrarily near-optimal sum utility of each user's average throughput. Simulation results demonstrate that the joint optimum can significantly outperform suboptimal alternatives.

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Section: Related Workmentioning

confidence: 99%

Dynamic Joint Resource Optimization for LTE-Advanced Relay Networks

Liang

et al. 2013

IEEE Trans. Wireless Commun.

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“…Many researchers have endeavored to develop efficient subchannel allocation schemes to improve the system performance in relay-based OFDMA networks [1,[5][6][7][8][9] . In [5], a subchannel allocation scheme is proposed to improve the total system throughput while maintaining the throughput of cell-edge users in LTE-advanced systems.…”

mentioning

confidence: 99%

“…The authors of [6] propose a subchannel allocation scheme, where the transmission time in each link is adaptively adjusted according to the channel state in an OFDMA cellular system with fixed RSs. In [1] and [7][8][9], the performance of the subchannel allocation scheme in two-hop relay systems has been evaluated in consideration of the quality of services (QoS)…”

mentioning

confidence: 99%

“…In [8] and [9], the authors proposed a subchannel assignment scheme in consideration of a minimum data rate requirement of users.…”

mentioning

confidence: 99%

“…However, although [1] and [5][6][7][8][9] proposed various subchannel allocation schemes to maximize the system performance, the conventional schemes do not exploit the frequency diversity in a two-hop relay link. In the conventional schemes, subchannels used in a BS-RS link and subchannels used in a RS-ship link use the same frequency band.…”

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confidence: 99%

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An Opportunistic Subchannel Allocation Scheme in Relay-based Marine Communication Networks

Lee

2014

The Journal of Korea Information and Communications Society

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This paper proposes an opportunistic subchannel allocation (OSA) scheme for relay-based marine communication networks to improve a sum-rate capacity. In most previous works for relay-based networks, each RS delivers the data received from the BS immediately to the corresponding ships in each frame. The achievable data-rate of the two-hop transmission (BS-RS and RS-ship links) is thus limited by the channel quality between BS-RS and RS-ship links. Hence, the radio resources can be wasted according to the difference in the channel quality between the BS-RS link and the RS-ship link. The proposed OSA scheme reduces the waste of radio resources by efficiently and independently allocating the radio resources at the BS-RS link and at the RS-ship link according to the channel quality of each link. The proposed OSA scheme, however, increases the computational complexity, because the BS finds the optimal OFDMA resource by checking the channel quality of all BS-RS links and RS-ship links. The simulation results show that the sum-rate capacity of the proposed OSA scheme improves maximum 14.0% compared with the conventional scheme.

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Channel and queue aware joint relay selection and resource allocation for MISO-OFDMA based user-relay assisted cellular networks

Baştürk

Özbek

2017

Telecommun Syst

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User-relay assisted orthogonal frequency division multiple access (OFDMA) networks are cost-effective solutions to meet the growing capacity and coverage demands of the next generation cellular networks. These networks can be used with multiple antennas technology in order to obtain a diversity gain to combat signal fading and to obtain more capacity gain without increasing the bandwidth or transmit power. Efficient relay selection and resource allocation are crucial in such a multi-user, multi-relay and multi-antenna environment to fully exploit the benefits of the combination of user-relaying and multiple antennas technology. Thus, we propose a channel and queue aware joint relay selection and resource allocation algorithm for multiple-input singleoutput (MISO)-OFDMA based user-relay assisted downlink cellular networks. Since, the proposed algorithm is not only channel but also queue-aware, the system resources are allocated efficiently among the users. The proposed algorithm for the MISO-OFDMA based user-relay assisted scheme is compared to existing MISO-OFDMA based non-relaying and fixed relay assisted schemes and it is also compared with the existing single-input single-output (SISO)-OFDMA based user-relay assisted scheme. Simulation results revealed that the proposed scheme outperforms the existing schemes in terms of cell-edge users' total data rate, average backlog and average delay.

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Relay Selection and Resource Allocation Schemes for Effective Utilization of Relay Zones in Relay-Based Cellular Networks

Cited by 23 publications

References 6 publications

Dynamic Joint Resource Optimization for LTE-Advanced Relay Networks

Dynamic Joint Resource Optimization for LTE-Advanced Relay Networks

An Opportunistic Subchannel Allocation Scheme in Relay-based Marine Communication Networks

Channel and queue aware joint relay selection and resource allocation for MISO-OFDMA based user-relay assisted cellular networks

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