Survey on cooperative strategies for wireless relay channels

Dai, Mingjun; Wang, Peng; Zhang, Shengli; Chen, Bin; Wang, Hui; Lin, Xiaohui; Sun, Cong

doi:10.1002/ett.2789

Cited by 43 publications

(41 citation statements)

References 203 publications

(241 reference statements)

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“…The fuzzy prediction method has been proposed by [13] to avoid the shortage of the resources in the route selection process. However, network coding, firstly proposed in [14] for noiseless wired networks, allows linear/nonlinear coding of multiple information flows at intermediate nodes, and it greatly outperforms the traditional routing-based methods in terms of the achievable data rates [15]. In VANET literature, in addition to content distribution protocols [16][17][18][19], protocols use the network coding to maintain the network bandwidth and/or power consumption as well as to enhance the robustness and the reliability of the network.…”

Section: The Literature Reviewmentioning

confidence: 99%

Network coding techniques for VANET advertising applications

Ahmed

Ariffin

Fisal

2015

J Wireless Com Network

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Network coding is an emerging technique known to improve the network performance in many aspects. In Vehicular Ad-hoc Networks (VANET), the bandwidth is considered to be one of the most important network resources. In this paper, we propose a network coding technique to improve the bandwidth utilization for non-safety applications in VANET. In a scenario where there are two sources broadcasting the data into the same area at the same time, the relay will use the network coding technique to decrease the number of rebroadcasting events and the consumption of the bandwidth, However, a fundamental problem for the relay when it receives a packet, is whether to wait for a coding opportunity and save the bandwidth or send the packet directly and reduce the delay. In order to address such tradeoff, we introduce two versions of our protocol, namely buffer size control scheme (BSCS) and time control scheme (TCS); by both versions we aim to control the delay that is experienced by the packet at each hop, while achieving better bandwidth utilization. Up to 38 % improvement in the bandwidth utilization has been recorded, and both schemes have shown a considerable amount of control on the imposed delay.

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Section: The Literature Reviewmentioning

confidence: 99%

Network coding techniques for VANET advertising applications

Ahmed

Ariffin

Fisal

2015

J Wireless Com Network

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“…First, set n D 0 for the subcarriers with the largest n n , until P N nD1 n n 6 P R . We repeat the P R,n calculation for all subcarriers, guarantee necessary and sufficient conditions using Equations (18) and (19) and set n D 0 for the subcarriers with the largest n n , until P N nD1 n n 6 P R , Á EE is reduced, D 0 or D 0.…”

Section: Iterative Energy-efficient Subcarrier Selection and Power Almentioning

confidence: 99%

Energy‐efficient resource allocation for amplify‐and‐forward relaying in OFDM systems

Kazemi

Omidi

Navaie

2014

Trans. Emerging Tel. Tech.

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In this paper, we study end‐to‐end energy efficiency of an orthogonal frequency‐division multiplexing relay‐based system under power constraints for the base station and relay node with system circuit power considerations. Using a two‐phase amplify‐and‐forward relaying protocol, we assume that relay has a fixed power constraint and the source power can vary in transmission power interval where the source employs a selective relaying mechanism for each individual subcarrier. Therefore, in our model, the source is able to adaptively select some subcarriers to be relayed. The radio resource allocation is then formulated as an energy‐efficient mixed binary integer programming, and then we propose a heuristic algorithm to find the suboptimal solution. The solution consists of the suboptimal transmit power of the source, the suboptimal set of subcarriers for relaying and the optimal transmit power of each subcarrier at the source and relay in the first and second time slots. The algorithm obtains energy‐efficient transmission power for a given relay transmission power based on a gradient descent method. Then a two‐step iterative scheme is proposed to obtain the subcarriers to be relayed as well as the optimal power allocation at the source and relay in the first and second time slots. To evaluate the efficiency of the proposed method, we compare its efficiency through simulations with the cases without using selective subcarrier relaying and without circuit power consideration in low and high relay transmit power regimes. The simulation results indicate that using our proposed method results in a significant improvement in the energy efficiency. Copyright © 2014 John Wiley & Sons, Ltd.

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“…Similar observations can be made for w 2 and w 3 . Thus, both the positive and the negative impacts of w 1 on the whole system can be expressed as 1 should be designed to make p p 1 as large as possible. However, it also introduces the severe interference to UE 3 , which deteriorates the total sum rate from the whole system point of view.…”

Section: Precoder Optimisationmentioning

confidence: 99%

“…The interference issue of multi‐cell systems is recognised as one of the most important topics , which has been researched extensively in this literature. The existing schemes can be classified into three categories according to the different locations of the mobile terminal on the cell‐edge.…”

Section: Introductionmentioning

confidence: 99%

Interference‐tolerating transmission protocol design for three‐cell systems

Wang

Sun

et al. 2014

Trans. Emerging Tel. Tech.

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The three‐cell system each having one cell‐edge mobile terminal (MT) is studied for the scenario of each MT only receiving the interference from the adjacent cell. Based on the observations that the inter‐cell interference could be exploited as a positive role, a two‐time‐slot‐based transmission protocol is designed for this system by allowing the existence of the interference received at MT, which saves one time slot over the conventional time division multiple access yet introduces the inter‐cell interference. In order to tackle the interference at the cell‐edge users, the problem for designing the precoder of the base station in these two time slots is proposed to achieve the potential gain from the new transmission protocol. In this paper, the well‐known criterion of the signal‐to‐leakage‐plus‐noise ratio is employed for designing the precoder in a closed‐form expression to demonstrate the significant gain of the new transmission protocol. Furthermore, an adaptive receiver is designed based on the linear and the nonlinear receivers to further suppress the inter‐cell interference. Simulation results have demonstrated the gain of the designed protocol, the optimised precoder and the adaptive receiver. Copyright © 2014 John Wiley & Sons, Ltd.

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Survey on cooperative strategies for wireless relay channels

Cited by 43 publications

References 203 publications

Network coding techniques for VANET advertising applications

Network coding techniques for VANET advertising applications

Energy‐efficient resource allocation for amplify‐and‐forward relaying in OFDM systems

Interference‐tolerating transmission protocol design for three‐cell systems

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