Joint Relay Assignment and Power Allocation for Multicast Cooperative Networks

Uddin, Mohammad Faisal; Assi, Chadi; Ghrayeb, Ali

doi:10.1109/lcomm.2012.012412.112327

Cited by 17 publications

(17 citation statements)

References 8 publications

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“…With green networking, power efficient multicasting has become increasingly important. This has been studied for single multicast session, for example, , as well as multiple multicast sessions, for example, . There are two basic directions towards minimizing energy consumption, one is reducing transmission power, provided the required service quality is satisfied based on current channel conditions , and another is reducing transmission time by transmitting at high rate when the channel conditions are sufficiently good .…”

Section: Related Workmentioning

confidence: 99%

Power efficient multicasting for pre‐cached multiple description traffic in a wireless network

Alganas

Zhao

2016

Wireless Communications

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In this paper, we study multicasting multiple description traffic to a group of mobile stations (MSs). The traffic is pre‐cached at a number of access points (APs), and the MSs have different quality requirements in terms of number of required descriptions. Each AP transmits one description and forms a single‐hop multicast group to reach a certain number of MSs. Different APs can transmit the same or different descriptions. MSs requiring multiple descriptions should be covered by at least the same number of the APs that transmit different descriptions. We study two problems, description assignments, and power allocations. The former is to assign a description for each AP, and the latter is to allocate the transmission power for each AP. Two objectives are considered subject to satisfying the requirements of the MSs, one is to minimize the total transmission power of all the APs, and another is to minimize the maximum transmission power of the APs. For each objective, a centralized and a distributed scheme are proposed, and their performance is compared with the optimum. Numerical results show very good performance of the heuristic schemes. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Related Workmentioning

confidence: 99%

Power efficient multicasting for pre‐cached multiple description traffic in a wireless network

Alganas

Zhao

2016

Wireless Communications

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“…As the core factors in cooperative relaying, rational relay selection and power allocation are the keys to improve system performance [7]. Whereas radio resource management of cooperative multicast systems remains an open problem, various studies have focused on relay selection and power allocation [4,[8][9][10][11][12][13][14][15][16][17][18]. Most studies in this field focus on only some of these issues.…”

Section: Introductionmentioning

confidence: 99%

“…A number of researchers have realized the importance of optimizing both relay selection and power allocation together, but have approached this as two independent problems rather than a joint optimization [12]. To address this problem, both Mei et al [13] and Uddin et al [14] attempt to maximize the combined capacity of the network by jointly optimizing relay selection and the sharing of relay powers in wireless cellular networks with multicast traffic. However, the performance of multicast traffic is not significantly improved, because this is determined by the weakest link rather than all the links in the co-MGroup.…”

Section: Introductionmentioning

confidence: 99%

Joint relay selection and power control for robust cooperative multicast in mmWave WPANs

Chu

Wang

et al. 2016

Sci. China Inf. Sci.

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We propose an optimization algorithm for joint relay selection and source and relay power allocation under mixed line-of-sight (LoS) and non-LoS path scenarios for both power saving and robustness enhancement of cooperative multicast in millimeter-wave wireless personal area networks. Our aims are to reduce power consumption and enhance the robustness of cooperative multicasts in millimeter-wave wireless personal area networks. First, we describe a novel beam training protocol that is capable of overhearing and information feedback to filter relay candidates with non-LoS links and avoid selecting relays for transceivers with LoS paths. Second, the joint relay selection and power allocation issue is formulated as an optimization problem with the objective of minimizing the maximum combined power consumption of the source and relay under maximum tolerable outage probabilities and transmit powers. By introducing relaxation and Lagrange multiplier methods, a closed-form expression for the joint relay selection and power allocation is obtained. Finally, simulation results indicate significant improvements in terms of both outage probability and power consumption over the conventional combined transmit power minimization algorithm.

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“…As cores of cooperative relaying, rational relay selection and power allocation are consequently the keys of improving system performance. While radio resource management of such a system remains an open problem, various attempts have been focused on relay selection and power allocation [7][8][9][10][11][12][13]. Most studies on this field merely focus on solving part of these issues.…”

Section: Introductionmentioning

confidence: 99%

“…There are researchers realizing the importance of treating both optimizations of relay selection and power allocation together, but in the way of as two independent problems rather than jointly optimizing [11]. To address this problem, both [12] and [13] aim to maximize the sum capacity of network by performing a joint problem of relay selection and optimal sharing of relay powers in wireless cellular networks with multicast traffic. However, the performances of multicast traffic fails to be significantly improved because they are determined by the weakest transmission.…”

Section: Introductionmentioning

confidence: 99%

Joint relay selection and power control for robust cooperative multicast in MmWave WPANs

Chu

Yang

et al. 2015

2015 IEEE International Conference on Communication Workshop (ICCW)

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We put forward a joint optimization algorithm for relay selection and source & relay power allocations under lineof-sight (LoS) and non-LoS mixed conditions for both power saving and robustness enhancement in practical cooperative multicast millimeter-wave (mmWave) wireless personal area networks (WPANs). Firstly, a novel beam training protocol capable of overhearing is devised to filter relay candidates with non-LoS links and avoid relays selection for LoS paths through feedback 1-bit channel amplitude information (CAI). Secondly, we provide the problem formulation that minimizes the maximum total transmit power consumption under constraints of maximum tolerable outage probability and limited power. As these two problems are coupled together, the formulation is non-convex with extremely high complexity of finding optimal solution. By introducing relaxation method and Lagrange multipliers algorithm, we propose an optimal approach to reduce complexity while maintaining reasonable performance, and derive a closed-form expression of optimal joint relay selection and power allocation. Lastly, simulation results indicate significant improvements both on outage probability and power consumption performances over the existing sum transmit power minimization algorithm.

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Joint Relay Assignment and Power Allocation for Multicast Cooperative Networks

Cited by 17 publications

References 8 publications

Power efficient multicasting for pre‐cached multiple description traffic in a wireless network

Power efficient multicasting for pre‐cached multiple description traffic in a wireless network

Joint relay selection and power control for robust cooperative multicast in mmWave WPANs

Joint relay selection and power control for robust cooperative multicast in MmWave WPANs

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