Performance analysis of ad-hoc wireless LANs for real-time traffic

Eshghi, Farshad; Elhakeem, A.K.

doi:10.1109/wpmc.2002.1088401

Cited by 9 publications

(14 citation statements)

References 13 publications

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“…10,11). If the distance between nodes is equal to 20 m, the MCS capac- ity drops by 50-60% in comparison to the effective capacity, while in 100 m case the MCS capacity is 70-80 % lower than the effective capacity.…”

Section: Figmentioning

confidence: 99%

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Impact of Spatial Channel Reuse and Adaptive Modulation on Wireless Mesh Network Capacity

Krenz

2012

Wireless Pers Commun

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The capacity analysis based on the concept of collision domains may be applied to wireless networks with mesh topology, e.g. wireless backhaul networks for rural areas, sensor networks, etc. The strength of the method is the fact that it may be easily fitted to any MAC protocol, routing algorithm, channel allocation method, and, therefore, is a valuable tool for verification and performance analysis of such algorithms. However, simplifications assumed by some authors may lead to erroneous results, e.g. significantly underestimated capacity of the WMN. Therefore, phenomena specific to wireless networks, such as spatial channel reuse, and features specific to wireless standards, such as link adaptivity, should be included in the analysis, as presented in this paper.

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Section: Figmentioning

confidence: 99%

“…Most of the results presented in [3][4][5][6][7][8][9][10][11] were obtained assuming MAC mechanisms typical to IEEE 802.11 standard. However, the contention-based multiple access results in an excessive collisions in WMN and should be avoided [12,13].…”

Section: Related Workmentioning

confidence: 99%

Impact of Spatial Channel Reuse and Adaptive Modulation on Wireless Mesh Network Capacity

Krenz

2012

Wireless Pers Commun

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“…Since the IEEE 802.11 was standardized, there have been many research efforts conducted on analyzing and improving the performance and capacity of the 802.11 MAC protocol for WLANs and supporting real-time traffic [2]- [6].…”

Section: B Related Workmentioning

confidence: 99%

Selective bit-error checking at the MAC layer for voice over mobile ad hoc networks with IEEE 802.11

Dong

Chakares

Gersho

et al. 2004

2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733)

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Abstract-Mobile ad hoc networks (MANET) have more severe operating conditions than traditional wireless networks. The MAC protocol of IEEE 802.11 mitigates collisions and ensures error-free packet transmissions at the cost of limiting capacity and increasing latency. For voice transmission over MANETs this cost should be minimized. We propose and examine selective error checking (SEC) at the MAC layer of 802.11 that takes advantage of the fact that many of the speech bits can tolerate errors while other bits must be protected for effective reconstruction of the speech. Simulation results demonstrate that the network performance and the speech quality are substantially improved by modifying the MAC layer with SEC to suit a particular GSM speech compression standard, the Narrow-Band Adaptive MultiRate (NB-AMR) coder operating at a rate of 7.95 kbps.1

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“…Flexibility and mobility have made wireless local area networks (WLANs) a rapidly emerging field of activity in computer networking, attracting significant interests in the communities of academia and industry [1,2,3,5,6,7,8,9,10,11,13]. In the meantime, the IEEE standard for WLANs, IEEE 802.11 [14], has gained global acceptance and popularity in wireless computer networking markets and has also been anticipated to continue being the preferred standard for supporting WLANs applications.…”

Section: Introductionmentioning

confidence: 99%

Design and Performance Evaluation of an Optimal Collision Avoidance Mechanism over Congested and Noisy Channels for IEEE 802.11 DCF Access Method

Deng

Yen

2005

Information Networking. Convergence in Broadband and Mobile Networking

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Abstract. For the IEEE 802.11 protocol, the basic access method in its medium access control (MAC) layer protocol is the distributed coordination function (DCF). However, this strategy incurs a high collision probability and channel utilization is degraded in bursty arrival or congested scenarios. Besides, when a frame is collided on a wired network, the sender should slow down, but when one is lost on a wireless network, the sender should try harder. Extending the backoff time just makes matters worse because it brings bandwidth wastage. In this paper, we identify the relationship between backoff parameters and channel BER and put forth a pragmatic problem-solving solution. In addition to theoretical analysis, simulations are conducted to evaluate the performance scheme. As it turns out, our design indeed provides a remarkable improvement in a heavy load and error-prone WLANs environment.

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Performance analysis of ad-hoc wireless LANs for real-time traffic

Cited by 9 publications

References 13 publications

Impact of Spatial Channel Reuse and Adaptive Modulation on Wireless Mesh Network Capacity

Impact of Spatial Channel Reuse and Adaptive Modulation on Wireless Mesh Network Capacity

Selective bit-error checking at the MAC layer for voice over mobile ad hoc networks with IEEE 802.11

Design and Performance Evaluation of an Optimal Collision Avoidance Mechanism over Congested and Noisy Channels for IEEE 802.11 DCF Access Method

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