A case for adapting channel width in wireless networks

Chandra, Ranveer; Mahajan, Ratul; Moscibroda, Thomas; Raghavendra, Ramya; Bahl, Paramvir

doi:10.1145/1402958.1402975

Cited by 164 publications

(33 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prior works [15], [16] show experimentally that halving a single Wi-Fi channel increases the total energy in the bandwidth, yielding an SNR gain of ≈3 dB. We enhance these tests to check whether the SNR statement holds when the total active bandwidth remains the same but the number (then the width) of channels changes.…”

Section: B Improved Signal To Noise Ratiomentioning

confidence: 92%

Breaking through the Full-Duplex Wi-Fi capacity gain

Queiroz

Vilela

Hexsel

2016

2016 7th International Conference on the Network of the Future (NOF)

View full text Add to dashboard Cite

In this work we identify a seminal design guideline that prevents current Full-Duplex (FD) MAC protocols to scale the FD capacity gain (i.e. 2× the half-duplex throughput) in single-cell Wi-Fi networks. Under such guideline (referred to as 1:1), a MAC protocol attempts to initiate up to two simultaneous transmissions in the FD bandwidth. Since in single-cell Wi-Fi networks MAC performance is bounded by the PHY layer capacity, this implies gains strictly less than 2× over half-duplex at the MAC layer. To face this limitation, we argue for the 1:N design guideline. Under 1:N, FD MAC protocols 'see' the FD bandwidth through N>1 orthogonal narrow-channel PHY layers. Based on theoretical results and software defined radio experiments, we show the 1:N design can leverage the Wi-Fi capacity gain more than 2× at and below the MAC layer. This translates the denser modulation scheme incurred by channel narrowing and the increase in the spatial reuse offer enabled by channel orthogonality. With these results, we believe our design guideline can inspire a new generation of Wi-Fi MAC protocols that fully embody and scale the FD capacity gain.

show abstract

Section: B Improved Signal To Noise Ratiomentioning

confidence: 92%

Breaking through the Full-Duplex Wi-Fi capacity gain

Queiroz

Vilela

Hexsel

2016

2016 7th International Conference on the Network of the Future (NOF)

View full text Add to dashboard Cite

show abstract

“…This is motivated by the observation that marginal true value per channel is also non-increasing with the demand [29].…”

Section: Weakly Strategy-proof Algorithm For Non-uniform Demandmentioning

confidence: 99%

Strategy-Proof Spectrum Allocation among Multiple Operators

Yadav

Kulkarni

Karandikar

2019

2019 IEEE Wireless Communications and Networking Conference (WCNC)

View full text Add to dashboard Cite

To address the exponentially increasing data rate demands of end users, necessitates efficient spectrum allocation among co-existing operators in licensed and unlicensed spectrum bands to cater to the temporal and spatial variations of traffic in the wireless network. In this paper, we address the spectrum allocation problem among non-cooperative operators via auctions. The classical Vickrey-Clarke-Groves (VCG) approach provides the framework for a strategy-proof and social welfare maximizing auction at high computational complexity, which makes it infeasible for practical implementation. We propose sealed bid auction mechanisms for spectrum allocation which are computationally tractable and hence applicable for allocating spectrum by performing auctions in short durations as per the dynamic load variations of the network. We establish that the proposed algorithm is strategy-proof for uniform demand. Furthermore, for non-uniform demand we propose a algorithm that satisfies weak strategy-proofness. We also consider non-linear increase in the marginal valuations with demand. Simulation results are presented to exhibit the performance comparison of the proposed algorithms with VCG and other existing mechanisms.

show abstract

“…In all those previous works, the case of multimedia traffics in WBAN is not considered. Adapting spectrum width is an ambitious deal for multimedia traffics even if it has some drawbacks in energy consumption and transmission range, 5 and it is a complex problem for maintaining the network performances. Thus, the game theory approach is likely to be a good solution.…”

Section: Related Workmentioning

confidence: 99%

“…For every number of retry, the value of the contention window is computed depending on whether it is odd or even. 32 Chandra et al 5 have shown that extending bandwidth increases throughput (+) and energy consumption (−) and decreases delay (+) and transmission range (−), denoted by h, e, d, and r, respectively. Let i = h + d + e + r. In this way, the node's utility function is given by relation (6) as follows:…”

Section: System Modelmentioning

confidence: 99%

GATE, a game theory approach on traffic volume aware channel width adaptation for WBAN medical applications

Manirabona

Boudjit

2018

Int J Communication

View full text Add to dashboard Cite

Summary Traditional single channel communication in Wireless Sensor Networks (WSN) offers limited network throughput due to frequent interferences and congestion caused by concurrent transmissions in the same neighborhood. On the one hand, successful packet delivery requires mostly multiple retransmissions because of frequent collisions which also uses much battery. On the other hand, concurrent transmissions over multiple channels not only offer better network throughput and delays, but also reduce power consumption as packet collisions are minimized or eliminated depending upon the efficiency of the concerned channel assignment scheme. This may ensure QoS requirements of transmissions demanding high bandwidth and those that are delay sensitive such as in the case of wireless body area networks. In this paper, we consider a multiple channel wireless body area networks and propose GATE, a theoretical game approach to adapt the channel bandwidth to the volume traffic requirement. In this way, medical video and audio traffics which are likely to be much bandwidth consumer are mainly considered using their priority classes. The simulation results show good performances of the proposed system in terms of increasing throughput and significantly reducing delay and energy consumption.

show abstract

A case for adapting channel width in wireless networks

Cited by 164 publications

References 15 publications

Breaking through the Full-Duplex Wi-Fi capacity gain

Breaking through the Full-Duplex Wi-Fi capacity gain

Strategy-Proof Spectrum Allocation among Multiple Operators

GATE, a game theory approach on traffic volume aware channel width adaptation for WBAN medical applications

Contact Info

Product

Resources

About