Fine-grained channel access in wireless LAN

Tan, Kun; Fang, Jian; Zhang, Yuanyang; Chen, Shouyuan; Shi, Lixin; Zhang, Jiansong; Zhang, Yongguang

doi:10.1145/1851182.1851202

Cited by 148 publications

(45 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the inefficiency of the timedomain contention mechanisms, recently researchers propose backoff mechanisms in frequency-domain. Authors in [17] promote FDMA based fine grained channel access (FICA) in frequency-domain using RTS/CTS. Instead of allocating whole channel bandwidth to a single node, bandwidth is allocated as per node's requirement.…”

Section: Prior Workmentioning

confidence: 99%

No more hidden backoff: Advertise backoff in frequency domain

Alvi

Baig

2014

2014 Australasian Telecommunication Networks and Applications Conference (ATNAC)

View full text Add to dashboard Cite

IEEE 802.11 standard backoff mechanism is vulnerable to selfish MAC layer misbehavior. A greedy node cheating on backoff rules can attain higher bandwidth and cause unfairness among nodes. In addition, selfish behavior is severe when honest nodes use longer contention window size. Contention overhead and unshared backoff value makes backoff mechanism vulnerable. Various studies have addressed misbehavior and overhead problems separately. In this paper, we address both of these problems by proposing a frequency-domain backoff mechanism to mitigate both backoff misbehavior and contention overhead. In this mechanism, the non-interfering capability of OFDM based PHY data-subcarriers is exploited and RTS packets are transmitted using single randomly chosen data-subcarrier. Using RTS, transmitters advertise their backoff value which in-turn is used to monitor selfish behavior at the receiver. Performance analysis suggest that the proposed mechanism promises lower overhead and higher efficiency gains over standard protocol in various network scenarios.Index , MAC, backoff misbehavior, random channel access, OFDM, binary exponential backoff.

show abstract

Section: Prior Workmentioning

confidence: 99%

No more hidden backoff: Advertise backoff in frequency domain

Alvi

Baig

2014

2014 Australasian Telecommunication Networks and Applications Conference (ATNAC)

View full text Add to dashboard Cite

show abstract

“…As wireless multicarrier techniques become prevailing, frequency diversity brings in new challenges and opportunities for MAC protocol design [7]. To see why this happens, we take Orthogonal Frequency Division Multiplexing (OFDM) modulation as illustration.…”

Section: Introductionmentioning

confidence: 99%

FC-MAC: Fine-grained cognitive MAC for wireless video streaming

Wang

Xiao

et al. 2014

2014 IEEE Global Communications Conference

View full text Add to dashboard Cite

Recently, there is a massive growth in the amount of wireless video traffics. To increase the network efficiency and cater to the needs of Quality of Experience (QoE), researchers propose hybrid MAC schemes, with multiple MAC protocols anchored in a single MAC layer. Different MAC protocols are selected for diverse users' requirements. However, the existing hybrid MAC mainly combines various MAC protocols in time domain. Only one type of traffic can be satisfied at a time, and others have to endure poor QoE. Meanwhile, the channel resources are not fully utilized due to coarse usage in time domain. Motivated by this, we propose FC-MAC, a Fine-grained Cognitive MAC for video streaming in wireless networks. Instead of dividing channel time into slots, FC-MAC splits the channel frequency into fine-grained subchannels, and hybrid different MAC protocols in frequency domain. By dynamically adjusting the bandwidth and the MAC protocols according to the users' needs and channel condition, FC-MAC ensures the QoE at low cost and achieves high multiplexing gain. We conduct extensive simulations to verify the effectiveness of FC-MAC. Numerous results show that compared with time domain hybrid MAC, FC-MAC achieves 190% performance gain.

show abstract

“…To copy otherwise, to republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. work [7,15,17,23,25,26] has examined strategies to assign flexible channels. More recently, this problem of choosing the right frequency and width for communication has gained relevance with the onset of white-space networking where agile adaptation of these parameters is essential [6].…”

Section: Introductionmentioning

confidence: 99%

FLUID: Improving Throughputs in Enterprise Wireless LANs through Flexible Channelization

Rayanchu

Shrivastava

Banerjee

et al. 2012

IEEE Trans. on Mobile Comput.

View full text Add to dashboard Cite

This paper introduces models and a system for designing 802.11 wireless LANs (WLANs) using flexible channelization -the choice of an appropriate channel width and center frequency for each transmission. In contrast to current 802.11 systems that use fixed width channels, the proposed system, FLUID, configures all access points and their clients using flexible channels. We show that a key challenge in designing such a system stems from managing the effects of interference due to multiple transmitters employing variable channel widths, in a network-wide setting. We implemented FLUID in an enterprise-like setup using a 50 node testbed (with off-the shelf wireless cards) and we show that FLUID improves the average throughput by 59% across all PHY rates, compared to existing fixed-width approaches.

show abstract

Fine-grained channel access in wireless LAN

Cited by 148 publications

References 18 publications

No more hidden backoff: Advertise backoff in frequency domain

No more hidden backoff: Advertise backoff in frequency domain

FC-MAC: Fine-grained cognitive MAC for wireless video streaming

FLUID: Improving Throughputs in Enterprise Wireless LANs through Flexible Channelization

Contact Info

Product

Resources

About