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Media access control

About: Media access control is a(n) research topic. Over the lifetime, 7947 publication(s) have been published within this topic receiving 111855 citation(s).

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Papers
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Proceedings ArticleDOI
Jungmin So1, Nitin H. Vaidya1Institutions (1)
24 May 2004-
TL;DR: This paper proposes a medium access control (MAC) protocol for ad hoc wireless networks that utilizes multiple channels dynamically to improve performance and solves the multi-channel hidden terminal problem using temporal synchronization.

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Abstract: This paper proposes a medium access control (MAC) protocol for ad hoc wireless networks that utilizes multiple channels dynamically to improve performance. The IEEE 802.11 standard allows for the use of multiple channels available at the physical layer, but its MAC protocol is designed only for a single channel. A single-channel MAC protocol does not work well in a multi-channel environment, because of the multi-channel hidden terminal problem . Our proposed protocol enables hosts to utilize multiple channels by switching hannels dynamically, thus increasing network throughput. The protocol requires only one transceiver per host, but solves the multi-channel hidden terminal problem using temporal synchronization. Our scheme improves network throughput signifiantly, especially when the network is highly congested. The simulation results show that our protocol successfully exploits multiple hannels to achieve higher throughput than IEEE 802.11. Also, the performance of our protocol is comparable to another multi-hannel MAC protocol that requires multiple transceivers per host. Since our protocol requires only one transceiver per host, it an be implemented with a hardware complexity comparable to IEEE 802.11.

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1,465 citations


DOI
01 Jan 2004-
TL;DR: This document is FOR COMMENT as a potential DRAFT standard for medium-access physical layer components that meet the functional requirements of a point-to-multipoint Broadband (BWA) system as defined by the IEEE 802.16 Working Group.

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Abstract: This chapter contains sections titled: Overview MAC convergence sublayer MAC common part sublayer MAC security sublayer MAC enhancements for 2-11 GHz operation IEEE 802.16 physical layers Coexistence BWA business and technology trends

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1,093 citations


Proceedings ArticleDOI
Alec Woo1, David E. Culler1Institutions (1)
16 Jul 2001-
TL;DR: This work proposes an adaptive rate control mechanism aiming to support media access control in sensor networks and finds that such a scheme is most effective in achieving the authors' fairness goal while being energy efficient for both low and high duty cycle of network traffic.

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Abstract: We study the problem of media access control in the novel regime of sensor networks, where unique application behavior and tight constraints in computation power, storage, energy resources, and radio technology have shaped this design space to be very different from that found in traditional mobile computing regime. Media access control in sensor networks must not only be energy efficient but should also allow fair bandwidth allocation to the infrastructure for all nodes in a multihop network. We propose an adaptive rate control mechanism aiming to support these two goals and find that such a scheme is most effective in achieving our fairness goal while being energy efficient for both low and high duty cycle of network traffic.

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1,066 citations


30


Journal ArticleDOI
Guocong Song1, Ye Li1Institutions (1)
TL;DR: The utility is used in this study to build a bridge between the physical layer and the media access control (MAC) layer and to balance the efficiency and fairness of wireless resource allocation.

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Abstract: In this paper, we provide a theoretical framework for cross-layer optimization for orthogonal frequency division multiplexing (OFDM) wireless networks. The utility is used in our study to build a bridge between the physical layer and the media access control (MAC) layer and to balance the efficiency and fairness of wireless resource allocation. We formulate the cross-layer optimization problem as one that maximizes the average utility of all active users subject to certain conditions, which are determined by adaptive resource allocation schemes. We present necessary and sufficient conditions for utility-based optimal subcarrier assignment and power allocation and discuss the convergence properties of optimization. Numerical results demonstrate a significant performance gain for the cross-layer optimization and the gain increases with the number of active users in the networks.

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671 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2021117
2020208
2019285
2018270
2017306
2016431

Top Attributes

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Topic's top 5 most impactful authors

Mao Yang

12 papers, 114 citations

Zhongjiang Yan

11 papers, 112 citations

Santosh Paul Abraham

11 papers, 156 citations

Choong Seon Hong

10 papers, 207 citations

Hiroshi Harada

9 papers, 30 citations