Outage analysis and optimal power allocation for multinode relay networks

Seddik, Karim G.; Sadek, Ahmed K.; Su, Weifeng; Liu, K.J.R.

doi:10.1109/lsp.2006.888424

Cited by 167 publications

(112 citation statements)

References 8 publications

Supporting

Mentioning

112

Contrasting

Order By: Relevance

“…Note that the channel average mutual information is a function of several factors including the coding protocol, the relay selection scheme for constructing the decoding set R sj,t , and the fading coefficients of the channel [13], [18], [20]. I sj,t,d(sj,t) is also a random variable.…”

Section: A Relay Selection Game Formulationmentioning

confidence: 99%

Self-Organized Relay Selection for Cooperative Transmission in Vehicular Ad-Hoc Networks

Tian

Zhou

Sheng

et al. 2017

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

Abstract-Cooperation is a promising paradigm to improve spatial diversity in vehicular ad-hoc networks. In this paper, we pose a fundamental question: how the greediness and selfishness of individual nodes impact cooperation dynamics in vehicular ad-hoc networks. We map the self-interest-driven relay selection decision-making problem to an automata game formulation and present a non-cooperative game-theoretic analysis. We show that the relay selection game is an ordinal potential game. A decentralized self-organized relay selection algorithm is proposed based on a stochastic learning approach where each player evolves toward a strategic equilibrium state in the sense of Nash. Furthermore, we study the exact outage behavior of the multi-relay decode-and-forward cooperative communication network. Closed-form solutions are derived for the actual outage probability of this multi-relay system in both independent and identically distributed channels and generalized channels, which need not assume an asymptotic or high signal-to-noise ratio. Two tight approximations with low computational complexity are also developed for the lower bound of the outage probability. With the exact closed-form outage probability, we further develop an optimization model to determine optimal power allocations in the cooperative network, which can be combined with the decentralized learning-based relay selection. The analysis of the exact and approximative outage behaviors and the convergence properties of the proposed algorithm toward a Nash equilibrium state are verified theoretically and numerically. Simulation results are also given to demonstrate that the resulting cooperative network induced by the proposed algorithm achieves high energy efficiency, transmission reliability, and network-wide fairness performance.Index Terms-Vehicular ad-hoc networks, cooperative communication, relay selection, outage probability, energy efficiency, noncooperative game.

show abstract

Section: A Relay Selection Game Formulationmentioning

confidence: 99%

Self-Organized Relay Selection for Cooperative Transmission in Vehicular Ad-Hoc Networks

Tian

Zhou

Sheng

et al. 2017

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

show abstract

“…The idea of cooperative transmission was originally conceived by simply relying on the fundamental broadcast feature of the wireless medium, which is frequently regarded as a drawback. In a nutshell, in multi-user wireless systems, single-antenna-assisted MSs may cooperatively share their antennas in order to achieve the so-called cooperative diversity as well as a path-loss-reduction based power gain by forming a virtual antenna array (VAA) [21,22] in both uplink (UL) and downlink (DL) transmissions. The concept of user cooperation has been first proposed in [19,20] for a twouser cooperative CDMA system, where orthogonal codes are employed by the active users in order to avoid multiple access interference.…”

Section: A Motivations Behind Cooperative Communicationsmentioning

confidence: 99%

Dispensing with Channel Estimation: Differentially Modulated Cooperative Wireless Communications

Wang

Hanzo

2011

IEEE Commun. Surv. Tutorials

View full text Add to dashboard Cite

Abstract-As a benefit of bypassing the potentially excessivecomplexity and yet inaccurate channel estimation, differentially encoded modulation in conjunction with low-complexity noncoherent detection constitutes a viable candidate for usercooperative systems, where estimating all the links by the relays is unrealistic. In order to stimulate further research on differentially modulated cooperative systems, a number of fundamental challenges encountered in their practical implementations are addressed, including the time-variant-channel-induced performance erosion, flexible cooperative protocol designs, resource allocation as well as its high-spectral-efficiency transceiver design. Our investigations demonstrate the quantitative benefits of cooperative wireless networks both from a pure capacity perspective as well as from a practical system design perspective.

show abstract

“…However, it is often impractical for the mobile to employ a large number of antennas for the sake of achieving a diversity gain due to its limited size. Fortunately, in multi-user wireless systems cooperating mobiles may share their antennas in order to achieve uplink transmit diversity by formig a virtual antenna array (VAA) in a distributed fashion [2,3]. On the other hand, in order to avoid channel estimation for a VAA-aided system, which may impose both an excessive complexity and a high pilot overhead, especially in mobile environments associated with relatively rapidly fluctuating channel conditions, differentially encoded transmissions combined with non-coherent detection and hence requiring no channel state information (CSI) at the receiver becomes an attractive design alternative, leading to differential modulation assisted cooperative communications [4][5][6].…”

Section: Background and Motivationmentioning

confidence: 99%

To Cooperate or Not: A Capacity Perspective

Wang

Kong

et al. 2010

2010 IEEE 71st Vehicular Technology Conference

View full text Add to dashboard Cite

Abstract-It is widely recognized that differential decode-andforward (DDF) cooperative transmission scheme is capable of providing a superior performance compared to classic direct transmissions employing differential detection, where no channel coding is used. However, the diversity gains achieved by the cooperative system become modest in practical channel coded scenarios, where the interleaving and channel coding gains dominate. Therefore, when a cooperative wireless communication system is designed to approach the maximum achievable spectral efficiency by taking the cooperation-induced multiplexing loss into account, it is not obvious, whether or not the relay-aided system becomes superior to its direct-transmission based counterpart, especially, when advanced channel coding techniques are employed. Hence in this paper the capacity of the single-relayassisted DDF based cooperative system was studied in comparison to that of its direct-transmission based counterpart in order to answer the above-mentioned dilemma. I. BACKGROUND AND MOTIVATIONThe technological advances in integrated circuits and radiofrequency electronics facilitate the employment of ever more sophisticated signal processing and coding algorithms. At the same time, it is increasingly important to find energy-and bandwidth-efficient solutions for reliable digital communication over time-varying wireless channels. Multiple antenna aided diversity techniques [1] constitute powerful arrangements of mitigating the deleterious effects of fading, hence improving the end-to-end system performance, which is usually achieved by multiple co-located antenna elements at the transmitter and/or receiver. However, it is often impractical for the mobile to employ a large number of antennas for the sake of achieving a diversity gain due to its limited size. Fortunately, in multi-user wireless systems cooperating mobiles may share their antennas in order to achieve uplink transmit diversity by formig a virtual antenna array (VAA) in a distributed fashion [2,3]. On the other hand, in order to avoid channel estimation for a VAA-aided system, which may impose both an excessive complexity and a high pilot overhead, especially in mobile environments associated with relatively rapidly fluctuating channel conditions, differentially encoded transmissions combined with non-coherent detection and hence requiring no channel state information (CSI) at the receiver becomes an attractive design alternative, leading to differential modulation assisted cooperative communications [4][5][6].In point-to-point communication systems using a singleantenna or co-located multiple antennas, it is feasible to achieve a high spectral efficiency by approaching Shannon's capacity limit with the aid of channel coding [7,8]. However, in contrast to the well-understood limitations of point-to-point single-user transmissions, researchers are only beginning to understand the fundamental performance limits of wireless multiuser networks, such as, for example the differentially The authors are with...

show abstract

Outage analysis and optimal power allocation for multinode relay networks

Cited by 167 publications

References 8 publications

Self-Organized Relay Selection for Cooperative Transmission in Vehicular Ad-Hoc Networks

Self-Organized Relay Selection for Cooperative Transmission in Vehicular Ad-Hoc Networks

Dispensing with Channel Estimation: Differentially Modulated Cooperative Wireless Communications

To Cooperate or Not: A Capacity Perspective

Contact Info

Product

Resources

About