Bandwidth exchange as an incentive for relaying

Abstract-Cooperative forwarding in wireless networks has shown to yield rate and diversity gains, but it incurs energy costs borne by the cooperating nodes. In this paper we consider an incentive mechanism called Bandwidth Exchange (BE) where the nodes flexibly exchange the transmission bandwidth as a means of providing incentive for forwarding data, without increasing either the total bandwidth required or the total transmit power. The advent of cognitive radios and multicarrier systems such as Orthogonal Frequency Division Multiple Access (OFDMA) with the ability to flexibly delegate and employ a number of subcarriers makes this approach particularly appealing compared to other incentive mechanisms that are often based on abstract notions of credit and shared understanding of worth. We consider a -node wireless network over a fading channel and use a Nash Bargaining Solution (NBS) mechanism to study the benefits of BE in terms of rate and coverage gains. We also propose two heuristic algorithms based on simple probabilistic rules for forwarding and study the tradeoffs in terms of performance among these approaches. Our results reveal that bandwidth exchange based forwarding can provide transmit power savings in OFDMA networks of at least 3dB compared to noncooperation.Index Terms-Cognitive radio, incentive mechanism, bandwidth exchange, Nash bargaining, OFDMA.

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“…For the two-node NBS, a geometric interpertation exists [15] [21] for the solution of (10). The solution is given by in Fig.…”

Section: A the Two-node Nbs Revisitedmentioning

confidence: 99%

“…Our incentive design in a -node network is based on the two-node Nash Bargaining Solution (NBS) with BE, the details of which can be found in [15]. A similar NBS-based cooperation strategy for a two-node network was also discussed in [16].…”

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confidence: 99%

Bandwidth exchange: an energy conserving incentive mechanism for cooperation

Zhang

Shinkuma

Mandayam

2010

IEEE Trans. Wireless Commun.

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“…Equations (1) and (2) deſne the basic mechanism of BE as described in [1] -instead of raising transmission power, cooperation is achieved by autonomously reallocate bandwidth resources among the nodes. Note that they also describe the relationship of the rates (R ij ) and bandwidth portion (ΔW ij ) to the link gain ρ ij .…”

Section: System Model and Bandwidth Exchangementioning

confidence: 99%

“…To circumvent the above difſculties, we have recently proposed Bandwidth Exchange (BE) as an incentive for forwarding. Speciſcally in [1], we have considered a two-node network where each node is endowed with orthogonal frequency resources and shown that a Nash Bargaining Solution (NBS) based mechanism can provide incentive for forwarding. In this paper we consider the extension of BE to a N -node network, i.e., whenever a node asks another node for cooperation, it delegates a portion of its frequency resource to the forwarder as immediate compensation for the forwarder's cost.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Exchange for enabling forwarding in wireless access networks

Zhang

Shinkuma

Mandayam

2009

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications

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Abstract-Cooperative forwarding in wireless networks has shown to yield beneſts of rate and diversity gains, but it needs to be incentivized due to the energy and delay costs incurred by individual nodes in such cooperation. In this paper we consider an incentive mechanism called Bandwidth Exchange (BE) where the cooperating nodes ƀexibly exchange the transmission bandwidth (spectrum) as a means of providing incentive for forwarding data. The advent of cognitive radios with the ability to ƀexibly change their carrier frequency as well as their transmission bandwidth makes this form of incentive particularly attractive compared to other incentive mechanisms that are often based on abstract notions of credit and shared understanding of worth. Speciſcally, we consider a N -node wireless network and use a Nash Bargaining Solution (NBS) mechanism to study the beneſts of BE in terms of rate and coverage gains.

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“…To compensate the relay for these costs, some well known approaches include reputation based mechanisms, credit based incentives and mechanisms based on forwarding games [8]. A novel approach of bandwidth exchange was introduced in [9] in order to compensate the relay for its incurred costs.…”

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Bandwidth Sharing for Relaying in Cellular Systems

Kumarappan

Yates

Mandayam

et al. 2012

IEEE Trans. Wireless Commun.

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Abstract-We investigate bandwidth allocation in next generation cellular systems employing relays similar to LTE advanced systems with type-I relays. We jointly optimize the bandwidth and power usage under constraints on required rate, bandwidth and transmit power. We study scenarios wherein, the relay acts as a forwarder for multiple User Equipments (UEs/users) in both uplink and/or downlink. This includes scenarios when the relay has its own data to send along with forwarding the data of other users. We examine the weighted power minimization problem for relaying with multiple users. We also show specific results with user scenario and also single user case in order to understand how the bandwidth and power are allocated. Numerical evaluations with users on a three sector LTE-A cell employing Fractional Frequency Reuse (FFR) indicate that power savings of at least 3 dB can be achieved by optimizing over both bandwidth and power.

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Bandwidth exchange as an incentive for relaying

Cited by 22 publications

References 14 publications

Bandwidth exchange: an energy conserving incentive mechanism for cooperation

Bandwidth exchange: an energy conserving incentive mechanism for cooperation

Bandwidth Exchange for enabling forwarding in wireless access networks

Bandwidth Sharing for Relaying in Cellular Systems

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