Improvement in vehicular networking efficiency using a new combined WiMAX and DSRC system design

Doyle, Nicholas C.; Jaber, Nabih; Tepe, Kemal

doi:10.1109/pacrim.2011.6032865

Cited by 11 publications

(7 citation statements)

References 6 publications

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“…We have shown in [1] that the system efficiency decreased from 92% with a single active bi-directional connection to 58-59% with 70 active bi-directional connections. These results are also shown in Figure 3.…”

Section: Calculating N Sd For the Downlink Subframesmentioning

confidence: 92%

“…The overall efficiency of the system can be defined by the ratio of MAC data transmitted over the air interface to the total data transmitted [1,25]:…”

Section: Calculating N Sd For the Downlink Subframesmentioning

confidence: 99%

“…The metropolitan area WiMAX network is intended for blanketing a wide area with high-speed network capability, and correspondingly serves a relatively large number of users. We have previously shown in [1] that this high connection number seems to be Mobile WiMAX's weakness. We also show that by using an intermediate technology such as Dedicated Short-Range Communications (DSRC), concentrations of DSRC users can be served by a smaller number of WiMAX connections.…”

Section: Introductionmentioning

confidence: 98%

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New combined WiMAX/DSRC infrastructure design for efficient vehicular networking

Jaber

Doyle

Tepe

2012

J Wireless Com Network

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In this article, a new infrastructure of a combined Worldwide Interoperability for Microwave Access (WiMAX) and Dedicated Short-Range Communications (DSRC) link layer is proposed with the purpose of reducing simultaneous WiMAX connections. WiMAX offers wide area connectivity of vehicles to ground-based base stations, while DSRC offers relatively shorter communication that allows for vehicles in proximity of each other to communicate directly. The proposed design uses the fact that WiMAX amendments support the concept of a WiMAX relay node, and substitutes the WiMAX relay nodes with nodes that are capable of both WiMAX and DSRC communications. This change allows for the number of WiMAX connections to be concentrated while supporting more subscribing users via WiMAX tunnelled over DSRC relay. The focus of this design is on the use case of providing broadband Internet access to a large number of DSRC capable vehicles in a WiMAX served region. The design uses DSRC as a WiMAX tunnel, but with changes to the WiMAX protocol, specifically network entry and handover processes are redesigned to have different behaviour only when operating over DSRC. Network entry over DSRC modifications are described and illustrated with comparison to existing WiMAX standards. Handover process facilitated over both WiMAX and DSRC layers are described, illustrated and are also standard compliant. Unified modeling language is used to assist with the explanations of the components to improve understanding of the design in relation to existing WiMAX standards. In addition to standard WiMAX operability, the design can also support WiMAX data subscription using a software-defined WiMAX radio via DSRC relay connectivity. This proposed design improves WiMAX communication by reducing the number of WiMAX connections between vehicles. We plotted the throughput of various cluster sizes of WiMAX only mobile relay, versus our proposed DSRC-enabled WiMAX mobile relay in order to show the efficiency benefit of our design. We also provide a simulated curve of percentage improvement efficiency for varying amount of active users. We show that as the total number of users in the system increases, our proposed system significantly improves the overall system efficiency, especially in heavily congested traffic.

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Section: Calculating N Sd For the Downlink Subframesmentioning

confidence: 92%

“…The overall efficiency of the system can be defined by the ratio of MAC data transmitted over the air interface to the total data transmitted [1,25]:…”

Section: Calculating N Sd For the Downlink Subframesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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New combined WiMAX/DSRC infrastructure design for efficient vehicular networking

Jaber

Doyle

Tepe

2012

J Wireless Com Network

Self Cite

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“…We could expect upcoming deployments at a city level to support the high connectivity required by the upcoming smart cities. In both cases, the high mobility of the users and the high volume of potential connections may noticeably increase the network signaling overhead [5]. Thus, studying how to reduce the number of control messages exchanged by the network becomes crucial, especially those related to the management of the user mobility.…”

Section: Introductionmentioning

confidence: 99%

A 2-D random walk mobility model for WiMAX location update

Zhang

Das

Rodríguez-Carrión

2016

Computer Communications

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“…In [10] and [11], the performance of long term evolution (LTE) and worldwide interoperability for microwave access (WiMAX), respectively, are investigated, showing the feasibility of orthogonal frequency division multiple access (OFDMA) in vehicular scenarios. In [12] and [13] a combination of dedicated short range communication (DSRC) and OFDMA protocols is proposed to improve the performance of VANETs, and in [14] a comparison of Wi-Fi and WiMAX for vehicle-to-infrastructure communication in static urban environment is provided showing that WiMAX can offer a longer communication range than Wi-Fi, at the expense of a larger latency at a short distance.…”

Section: Introductionmentioning

confidence: 99%

On the exploitation of OFDMA properties for an efficient alert message flooding in VANETs

Bazzi

Masini

Zabini

2013

2013 IEEE International Conference on Communications (ICC)

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Vehicular ad hoc networks (VANETs) drive new challenging research issues at different layers of the protocol pillar, from physical to application. Focusing on the medium access layer, one of the most promising and not yet fully explored option is the adoption of orthogonal frequency division multiple access (OFDMA). Besides guaranteeing high spectral efficiency and effective resource allocation, it relies at the physical layer on orthogonal frequency division multiplexing, which allows repetitions of the same signals to be opportunistically combined at the receiver even if they are not perfectly synchronized. Exploiting this property, here we suggest and discuss the use of OFDMA for alert message flooding in VANETs to increase reliability and resource usage efficiency. The achievable benefit and the potential drawback (in terms of high delivery delay) are here assessed through a simple yet realistic model that allows to compare, in highway scenarios, OFDMA with carrier sensing multiple access/collision avoidance, currently adopted by IEEE 802.11p for distributed communications in high mobility scenarios.

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Improvement in vehicular networking efficiency using a new combined WiMAX and DSRC system design

Cited by 11 publications

References 6 publications

New combined WiMAX/DSRC infrastructure design for efficient vehicular networking

New combined WiMAX/DSRC infrastructure design for efficient vehicular networking

A 2-D random walk mobility model for WiMAX location update

On the exploitation of OFDMA properties for an efficient alert message flooding in VANETs

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