Improving the Channel Utilization of IEEE 802.11p/1609 Networks

Wang, S. Y.; Chou, C. L.; Liu, K. C.; Ho, Tse‐Lok; Hung, Wei-Hsiang; Huang, Chia-Chi; Hsu, Ming-Yi; Chen, H. Y.; Lin, Chun-Cheng

doi:10.1109/wcnc.2009.4917753

Cited by 49 publications

(22 citation statements)

References 3 publications

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“…Existing 802.11p performance evaluation has been done only by means of analysis and/or simulation [1], [2], [3], or even testbeds for 802.11p physical layer measurements [4], [5]. Some work has been done on measuring performance of legacy IEEE 802.11a/b/g in vehicular environments [6].…”

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confidence: 99%

Measuring IEEE 802.11p Performance for Active Safety Applications in Cooperative Vehicular Systems

Martelli

Renda

Santi

2011

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)

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Abstract-In this paper, we present a measurement study of application layer performance in IEEE 802.11p vehicular networks. More specifically, our focus is on active safety applications, which are based on the exchange of beacon messages containing status information between close-by vehicles. We consider two performance metrics relevant to active safety applications: the first is application-layer goodput, which can be used to optimize congestion control techniques aimed at limiting the beaconing load on the wireless channel; the second is the beacon reception rate, which is useful to estimate the level of situation awareness achievable onboard vehicles. Our measurements were conducted using a prototypal, 802.11p compliant communication device developed by NEC, in both stationary and mobile V2V scenarios, and disclosed several useful insights on 802.11p application-level performance. To the best of our knowledge, the ones presented in this paper are the first application-level measurements of IEEE 802.11p based vehicular networks reported in the literature. I. INTRODUCTIONGiven their potential of considerably reducing car accidents and improving traffic conditions, active safety applications are of primary importance in vehicular networking. This explains the extensive interest this class of applications has gathered in the research and industry community. Despite these intensive efforts, active safety application performance has been mostly evaluated through analysis and simulation. This is mainly due to the fact that the IEEE 802.11p standard for short range vehicular communications, upon which active safety application will be built, is still in draft form. Thus, 802.11p compliant hardware is still difficult to find, and often turns out to be rather expensive.To the best of our knowledge, no application-level IEEE 802.11p measurement study has been reported in the literature so far.

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confidence: 99%

Measuring IEEE 802.11p Performance for Active Safety Applications in Cooperative Vehicular Systems

Martelli

Renda

Santi

2011

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)

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“…However if the network remains in a bad state more the 60% the throughput decreases dramatically. It is worthy to note that this is not likely to happen [26].…”

Section: B Extended Sch Protocolmentioning

confidence: 96%

“…As such the IEEE 802.11p/1609 draft standards recommend that in such a condition the transmitting node should prevent sending out the packet but instead should send it in the next service frame, although the design avoids bandwidth wastage caused by incomplete packet reception, it results in bandwidth wastage at the end of each service frame due to not using the residual time. Even with the problems of multichannel operations, there have been many solutions put forth to overcome these problems [25], [26]. Considering the problem with SCH utilization mentioned above, the same study also proposed a solution by extending the time the SCH has to transmit a packet and additional protocols to ensure that the CCH can still be used and that the SCH isnt using unnecessary time when it is not needed [25], [26].…”

Section: A Bandwidth Wastage Problemmentioning

confidence: 99%

“…Even with the problems of multichannel operations, there have been many solutions put forth to overcome these problems [25], [26]. Considering the problem with SCH utilization mentioned above, the same study also proposed a solution by extending the time the SCH has to transmit a packet and additional protocols to ensure that the CCH can still be used and that the SCH isnt using unnecessary time when it is not needed [25], [26]. Another solution to the SCH utilization problem in multipacket size environment is to incorporate a Best-fit scheme where an output queue of different size packets is maintained and instead of fragmenting the data, the channel chooses the smaller packet in the output queue that can be transmitted in the current time frame [25].…”

Section: A Bandwidth Wastage Problemmentioning

confidence: 99%

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Evaluation of the IEEE 802.11p multi-channel operation in vehicular networks

Behravesh

Butler²

2016

Preprint

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“…But there are still several areas where improvement is desired [4], [5]. [6] aimed at enhancing channel utilization of 802.11p. Beam steering techniques to improve connectivity were proposed in [7].…”

Section: Introductionmentioning

confidence: 99%

A V2V communication system with enhanced multiplicity gain

Zhan¹,

Gottumukkala²,

Yokoyama³

et al. 2013

2013 IEEE Globecom Workshops (GC Wkshps)

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Abstract-Vehicle to vehicle (V2V) communication has gained renewed interest among research community which is further signified by the allocation of dedicated spectrum and an IEEE standard for their usage in recent years. However, 802.11p, the current IEEE standard for vehicular communications, has a relatively low multiplicity (the number of links that it can simultaneously support). In this work, we propose a new vehicular communication scheme based on sectored antennas in order to improve the multiplicity performance. We first show that a sectored antenna based vehicular communication system has higher multiplicity than 802.11p. To further enable multiple transmit sectors to communicate with a receive node simultaneously in a single receive sector, using an OFDMA system design, we propose a new sector-specific pilot design and corresponding channel estimation over time and frequency domains of the channels corresponding to various sectors. Finally, the performance characteristics of the proposed scheme are shown through simulations.

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Improving the Channel Utilization of IEEE 802.11p/1609 Networks

Cited by 49 publications

References 3 publications

Measuring IEEE 802.11p Performance for Active Safety Applications in Cooperative Vehicular Systems

Measuring IEEE 802.11p Performance for Active Safety Applications in Cooperative Vehicular Systems

Evaluation of the IEEE 802.11p multi-channel operation in vehicular networks

A V2V communication system with enhanced multiplicity gain

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