Fairness-Aware Joint Routing and Scheduling in OFDMA-Based Cellular Fixed Relay Networks

Salem, Mohamed; Adinoyi, Abdulkareem; Rahman, Mahmudur; Yanıkömeroğlu, Halim; Falconer, D.D.; Kim, Y.-D.; Shin, Wonjae; Kim, E.

doi:10.1109/icc.2009.5199024

Cited by 24 publications

(41 citation statements)

References 14 publications

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“…This could be the case as well if comparing the network performance, possibly under the same scheduling policy, with and without relay assistance. These observations have been captured by the performance results of the schemes in [30] and [54], which are presented in the case study in Section VI.…”

Section: B Throughput-fairness Tradeoff In Ofdma Relay Networkmentioning

confidence: 99%

“…However, it is quite challenging to devise efficient RRM schemes that tackle the joint problem. The algorithm presented in the case study is a good example of a class of dynamic joint routing and scheduling strategies discussed in the literature [17], as based on the theory in [18] and as applied to OFDMA relay networks [19]. In such a strategy, CCI is depicted by the achievable rates of individual hops on different OFDM tones.…”

Section: ) Relay Selection or In-cell Routingmentioning

confidence: 99%

“…PFS has also been implemented in [43] considering both halfand full-duplex UTs in a multihop frequency-division duplexing (FDD) network. However, due mainly to the inherent lack of queue awareness in the PFS besides the suboptimal extension strategy, the relay-enhanced scheme proposed in [19] is shown to provide more fairness in the throughput rate sense.…”

Section: Extending Conventional Scheduling Algorithms To Cellularmentioning

confidence: 99%

“…In fact, some works, such as [29] and [30], do employ the cell-edge relays in mitigating the ICI. In [29], an RS located at the cell edge is shared by the surrounding BSs and is equipped with multiple antennas.…”

Section: B CCI In Ofdma Cellular Relay Networkmentioning

confidence: 99%

“…The shared RS separates the received mixed signals and performs interference suppression using multiple-input-multiple-output (MIMO) techniques, on the same resource block, before forwarding to the respective UTs; we will revisit this approach in Section III. Using a different approach, the algorithm in [30] (the case study in Section VI) utilizes the existence of relays and their uniform geographical deployment to spatially randomize the ICI through its inherent cell-load balancing feature, which results in an even distribution of OFDM subchannels among the active relays of each cell. As such, a cell-edge user being served by a relay in one cell is less likely to receive ICI from the closest relay of the adjacent cell.…”

Section: B CCI In Ofdma Cellular Relay Networkmentioning

confidence: 99%

See 4 more Smart Citations

Opportunities and Challenges in OFDMA-Based Cellular Relay Networks: A Radio Resource Management Perspective

Salem

Adinoyi²,

Yanıkömeroğlu

et al. 2010

IEEE Trans. Veh. Technol.

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Abstract-The opportunities and flexibility in relay networks and orthogonal frequency-division multiple access (OFDMA) make the combination a suitable candidate network and air-interface technology for providing reliable and ubiquitous high-data-rate coverage in next-generation cellular networks. Advanced and intelligent radio resource management (RRM) schemes are known to be crucial toward harnessing these opportunities in future OFDMA-based relay-enhanced cellular networks. However, it is not very clear how to address the new RRM challenges (such as enabling distributed algorithms, intra-cell/inter-cell routing, intense and dynamic co-channel interference (CCI), and feedback overhead) in such complex environments comprising a plethora of relay stations (RSs) of different functionalities and characteristics. Employment of conventional RRM schemes in such networks will highly be inefficient if not infeasible. The next-generation networks are required to meet the expectations of all wireless users, irrespective of their locations. High-data-rate connectivity, mobility, and reliability, among other features, are examples of these expectations. Therefore, fairness is a critical performance aspect that has to be taken into account in the design of prospective RRM schemes. This paper reviews some of the prominent challenges involved in migrating from the conventional cellular architecture to the relay-based type and discusses how intelligent RRM schemes can exploit the opportunities in relay-enhanced OFDMA-based cellular networks. We identify the role of multiantenna systems and explore the current approaches in literature to extend the conventional schedulers to next-generation relay networks. This paper also highlights the fairness aspect in such networks in the light of the recent literature, provides some example fairness metrics, and compares the performances of some representative algorithms.

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Section: B Throughput-fairness Tradeoff In Ofdma Relay Networkmentioning

confidence: 99%

Section: ) Relay Selection or In-cell Routingmentioning

confidence: 99%

Section: Extending Conventional Scheduling Algorithms To Cellularmentioning

confidence: 99%

Section: B CCI In Ofdma Cellular Relay Networkmentioning

confidence: 99%

Section: B CCI In Ofdma Cellular Relay Networkmentioning

confidence: 99%

See 3 more Smart Citations

Opportunities and Challenges in OFDMA-Based Cellular Relay Networks: A Radio Resource Management Perspective

Salem

Adinoyi²,

Yanıkömeroğlu

et al. 2010

IEEE Trans. Veh. Technol.

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Energy efficient load balancing for future self-organized shared networks

et al. 2014

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Energy is an expensive commodity in long term evolution-advanced (LTE-A) networks, spurring a myriad of research approaches in recent years to attempt to minimize energy consumption in LTE-A, usually from the mobile users' perspective. In this work, the energy consumption of the network is analyzed, according to the operators' point of view. Network sharing and self-organized network (SON) technologies are attractive solutions for cost reduction, and for the minimization of energy utilization in LTE-A network. In this paper, a novel framework is provided using a selforganized load balancing (SO-LB) algorithm for minimizing energy cost per bit based on the scope of 3GPP standardization. Obtained simulation results show that by employing SO-LB algorithm in a shared network, it is possible to achieve up to 15-20 % savings in energy consumption when compared to LTE-A non-shared networks.Keywords LTE-A · Energy efficiency · Self-organized network (SON) · Network sharing · Load balancing (LB)

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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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Fairness-Aware Joint Routing and Scheduling in OFDMA-Based Cellular Fixed Relay Networks

Cited by 24 publications

References 14 publications

Opportunities and Challenges in OFDMA-Based Cellular Relay Networks: A Radio Resource Management Perspective

Opportunities and Challenges in OFDMA-Based Cellular Relay Networks: A Radio Resource Management Perspective

Energy efficient load balancing for future self-organized shared networks

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

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