MAC Protocol Using Asynchronous Multi-Channels in Ad Hoc Networks

Son, Chunghwan; Lee, Neung-Hyung; Kim, Byungseung; Bahk, Saewoong

doi:10.1109/wcnc.2007.79

Cited by 8 publications

(15 citation statements)

References 8 publications

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“…It uses control channel bandwidth more efficiently to reduce the chance of shared channel congestion, particularly in heavily congested networks. In [13], time offsets between channels were introduced for asynchronous multichannel environments. Nodes that have no tasks involved in the current channel can switch to some other channels for more data transmission trials, thereby enhancing the total throughput.…”

Section: Related Workmentioning

confidence: 99%

“…Most of the above multichannel 802.11 protocols proposed in the literature (e.g., [4], [6], [7], [13], and [15]) appear to achieve less than the n · C targeted capacity, where n is the number of channels used, and C is the capacity achieved by a single-channel protocol. Their inefficiencies can be attributed to three reasons: 1) A dedicated control channel is used to allocate transmission channels; 2) the overhead that is induced by extra information added to the packet headers; and 3) the transmissions of RTS/DATA and the receptions of CTS/ACK by a node are assigned to the same channel, which limit the potential of simultaneous transmissions (details will be explained in Section III).…”

Section: Related Workmentioning

confidence: 99%

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Scaling Capacity by Two Channels in IEEE 802.11 Ad Hoc Networks With an SIR Comparison Algorithm

Ng¹,

Edwards

Liew

2010

IEEE Trans. Veh. Technol.

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Abstract-When an IEEE 802.11 ad hoc network achieves a capacity C using a single channel, the targeted capacity using two channels should be 2 · C. We believe that this should be used as the benchmark for capacity comparisons for multichannel schemes. However, most of the dual-channel 802.11 protocols proposed in the literature appear to achieve less than 60% of the 2 · C targeted capacity. In previous work, we proposed a linkdirectionality-based dual-channel medium-access-control (MAC) protocol (DCP) to boost the network capacities by up to 78% of our targeted capacities, i.e., 78% × 2 · C = 1.56 · C. However, the DCP still fails to reach the 2 · C capacity target due to the overheads incurred by the protocol. In this paper, we implement a signal-to-interference ratio (SIR) comparison algorithm (SCA) on top of the DCP in an attempt to further improve network capacity. This algorithm incurs relatively small overheads and can further relax the protocol constraints that are imposed by the virtual carrier-sensing mechanism. Interestingly, while the capacity of the pure DCP decreases when link lengths are short, the capacity of the pure SCA increases when link lengths are short. The two algorithms compensate for the downside of each other to bring about a more uniform capacity improvement. Simulations show that the proposed scheme [described as DCP with SCA (DCPwSCA)] can increase the network throughputs by 430% in lattice topologies and 213% in random topologies.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Scaling Capacity by Two Channels in IEEE 802.11 Ad Hoc Networks With an SIR Comparison Algorithm

Ng¹,

Edwards

Liew

2010

IEEE Trans. Veh. Technol.

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“…Classification of multi-channel MAC protocols with dedicated without dedicated control channel control channel multiple-transceiver [4,5,10,11] [ 3,9] single-transceiver [6,12] [2, 7,8], ours Equipped with multiple transceivers, nodes can access multiple channels simultaneously. Several solutions belong to the multiple-transceiver, with dedicated control channel category [4,5,10,11].…”

Section: Introductionmentioning

confidence: 99%

“…The weakness of having a dedicated control channel is that it may become a bottleneck if the network is heavy-loaded. The other solutions avoid using a dedicated control channel [2,7,8]. Some of them [7,8] adopt the concept of ATIM window in IEEE 802.11 PSM to complete channel allocation.…”

Section: Introductionmentioning

confidence: 99%

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Load Awareness Multi-Channel MAC Protocol Design for Ad Hoc Networks

Chao

2008

2008 IEEE International Conference on Sensor Networks, Ubiquitous, and Trustworthy Computing (Sutc 2008)

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Exploiting multiple channels improves the system performance in a heavy-loaded wireless ad hoc network. Many multi-channel MAC protocols have been proposed recently. The number of channels being used is fixed for these protocols, which limits their flexibility. As a result, these protocols may suffer from either longer delay in a light-loaded network or higher collision probability in a heavy-loaded one. In this paper, we propose a Load Awareness Multichannel MAC (LAMM) protocol which dynamically adjusts the number of channels being used according to the network load. Our scheme is able to utilize multiple channels to increase throughput when the network is heavily loaded. It can also switch back to use a single channel to reduce transmission delay when the network is lightly loaded. Simulation results verify that our LAMM significantly improves the network performance.

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Multi-channel cooperative MAC protocol for wireless LANs

Cetinkaya

2015

Ad Hoc Networks

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MAC Protocol Using Asynchronous Multi-Channels in Ad Hoc Networks

Cited by 8 publications

References 8 publications

Scaling Capacity by Two Channels in IEEE 802.11 Ad Hoc Networks With an SIR Comparison Algorithm

Scaling Capacity by Two Channels in IEEE 802.11 Ad Hoc Networks With an SIR Comparison Algorithm

Load Awareness Multi-Channel MAC Protocol Design for Ad Hoc Networks

Multi-channel cooperative MAC protocol for wireless LANs

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