scispace - formally typeset
Search or ask a question

An Analysis of Smart Antenna Usage for WiMAX Vehicular Communications

TL;DR: In this article, the authors present results of an experimental, simulation-based study, for mobile WiMAX V2I communications for different mobile station (MS) speeds, applicable to both omni-directional and beam forming smart antenna use.
Abstract: WiMAX communications for vehicular use is a topic of significant interest in the research and industry communities, for both V2V (vehicle-to-vehicle) and V2I (vehicle-to-infrastructure) scenarios. This paper presents results of an experimental, simulation-based study, for mobile WiMAX V2I communications for different mobile station (MS) speeds. The scenario results are applicable to both omni-directional and beam forming smart antenna use. This study describes a database consolidation process in order to determine multi-dimensional regions where different lower layer parameters have influence on the overall performance of WiMAX V2I communications. Based on the multi-dimensional graphs, optimal parameter sets and network topology information can be provided by the network operator to vehicular MS, (e.g. a car or a train), providing essential support for the mobile station’s smart antenna tracking systems and allow adaptation of the major WiMAX parameters to its speed and network topology.
Citations
More filters
Journal ArticleDOI
TL;DR: A hexagonal microstrip patch antenna has been developed to cover the navigational frequencies, WiMAX at 3.7 GHz and DSRC/IEEE802.11p at 5.9 GHz to meet the demands of various vehicular applications, which makes the antenna suitable for wireless applications of interest.
Abstract: Vehicle-to-everything communications (V2X), whose main objective is to improve security and efficiency, are provided by ad hoc vehicle networks that allow communication between vehicles. In the current study, a hexagonal microstrip patch antenna has been developed to cover the navigational frequencies, WiMAX at 3.7 GHz and DSRC/IEEE802.11p at 5.9 GHz to meet the demands of various vehicular applications. The antenna design is based on Cantor fractal slot, partial ground plane, and inset feed which is directly fed through the microstrip line. The proposed antenna shields the frequency band from 3.22 to 6.5 GHz with VSWR 2 within all the frequency bands. The presented antenna can resonate well in the 5.85–5.95 GHz band assigned for DSRC/IEEE802.11p and 3.7 GHz assigned for LTE/V2X. Simulated antenna gain varies from 3.06 to 5.25 dB within the operated frequency range providing an omnidirectional simulated radiation pattern in the most azimuth plane. To prove the validity of the simulation results, the chosen antenna structure has been fabricated and tested using a vector network analyzer MS2630. The measurement shows good results, which make the antenna suitable for wireless applications of interest.

14 citations

Journal ArticleDOI
TL;DR: The research results indicate that the smart cell structure can improve the dwell time of users within the cell and improve the traffic system performance.
Abstract: Based on the application of smart antennas in cellular mobile communications, this paper introduces the impact of the width of the antenna beams playing on the dwell time probability density function in cellular geometry with smart antenna. The research results indicate that the smart cell structure can improve the dwell time of users within the cell and improve the traffic system performance.

4 citations

Proceedings ArticleDOI
21 Jun 2012
TL;DR: This paper continues a complex study related to WiMax vehicular communications evaluation and optimization, focusing on simulations of a real smart antenna in WiMAX vehicular environments.
Abstract: The use of smart antenna systems in WiMAX vehicular communications increases the coverage and throughput thus reducing the infrastructure costs, creates the lower levels support for new high level innovative services and may increase applications security. However, new challenges appear related to interference range, neighbor discovery, mobility management, scheduling issues, in addition to some already existing ones as base station (BS) coverage and bandwidth availability, velocity versus application throughput, and service availability/continuity. The paper continues a complex study related to WiMAX vehicular communications evaluation and optimization, focusing on simulations of a real smart antenna in WiMAX vehicular environments.

3 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a new key lab of New Generation Broadband Wireless Mobile Communication Technology, Standard and Verification, China Academy of Telecommunication Research of MIIT (CATR), Beijing 100191, China.
Abstract: 1 Beijing Key Lab of New Generation Broadband Wireless Mobile Communication Technology, Standard and Verification, China Academy of Telecommunication Research of MIIT (CATR), Beijing 100191, China 2 Faculty Development Center, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, China 3 School of Telecommunications and Information Engineering, Xi’an University of Posts and Telecommunications, Xi’an 710121, China 4The Communications Group, Department of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK 5McGill University, 3480 Rue University, Montreal, Canada H3A 0E9

1 citations

References
More filters
Proceedings ArticleDOI
18 May 2009
TL;DR: The initial measurement studies show that while WiMAX can offer a longer communication range than WiFi, its latency can be significantly larger than that of WiFi at a short distance (e.g. less than 100m).
Abstract: Vehicular Network is becoming increasingly popular in recent years, in which vehicles constitute a wireless mobile network. Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) are two different modes of communication in a vehicular network. Some measurement studies have previously been undertaken to understand the feasibility of using WiFi for V2V and V2I communication. Recently WiMAX is emerging as one of the possible candidates for next generation mobile networks. In this work, we set out to understand the feasibility of using WiMAX for V2I communication as compared to the use of WiFi. Due to the hardware limitation, we focus on a static setting in urban environment. Our initial measurement studies show that while WiMAX can offer a longer communication range than WiFi, its latency can be significantly larger than that of WiFi at a short distance (e.g. less than 100m). In addition, we show the setting of frame size has a strong impact on the performance of WiMAX.

85 citations

Proceedings ArticleDOI
12 Oct 2009
TL;DR: An architecture based on the recently standardized IEEE 802.21 framework, integrating both mobility and Quality of Service (QoS) mechanisms, is evaluated through an advanced mobility scenario using a real WiMAX testbed, showing that it is able to provide QoS under dynamic scenarios, with fast integrated QoS and mobility signaling.
Abstract: Although IEEE 802.16 has emerged as one of the major candidates for next generation networks, it is also clear that in the near future the combination of several technologies will be required. In this sense, the support of mobility in heterogeneous environments, addressing broadband wireless, is one of the main requirements in next generation networks. This paper evaluates an architecture based on the recently standardized IEEE 802.21 framework, integrating both mobility and Quality of Service (QoS) mechanisms, through an advanced mobility scenario using a real WiMAX testbed. This architecture supports seamless mobility in broadband wireless access (BWA) networks, integrates different technologies, such as WiMAX and Wi-Fi, and thus, it is suitable for next generation network environments. The results, obtained through real experimentation of the implemented architecture, show that it is able to provide QoS under dynamic scenarios, with fast integrated QoS and mobility signaling.

8 citations

Proceedings ArticleDOI
20 Sep 2010
TL;DR: In this paper, the authors investigated the vehicular downlink performance for a number of on-car antenna configurations and found that the directionality and optimum polarization of the vehicle antennas improved both the range and throughput of the system.
Abstract: In this paper, mobile WiMAX trials are analysed to investigate the vehicular down-link performance for a number of on-car antenna configurations. The directionality and optimum polarization of the vehicular antennas are shown to improve both the range and throughput of the system. These improvements are attributed to the additional directive gain, and the reduced multi-input multi-output spatial correlation that results from orthogonal polarization. The mobile-WiMAX trials cover an urban vehicular scenario using a 2x2 MIMO system configuration. Results show that the throughput can be doubled for a wide range of received SNR levels (via STBC or SM) when a pair of directional dual polarized antennas are used at the vehicle (compared to omni-directional devices).

7 citations

Proceedings ArticleDOI
09 May 2010
TL;DR: The simulation campaign undertaken to identify the sets of configuration parameters having a major impact on the handover process for the IEEE 802.16e mobile station could be used to construct a database for guiding some cross-layer optimization algorithms deciding upon handover trigger, in order to increase the hand over performance, from the application point of view.
Abstract: In the context of micro and macro-mobility capabilities defined by IEEE 802.16e/WiMAX standards, the paper presents the simulation campaign undertaken to identify the sets of configuration parameters having a major impact on the handover process for the IEEE 802.16e mobile station. Simulation results could then be used to construct a database for guiding some cross-layer optimization algorithms deciding upon handover trigger, in order to increase the handover performance, from the application point of view.

6 citations

Proceedings ArticleDOI
10 Jun 2010
TL;DR: A SIP-based solution for terminal mobility and real-time applications, using SIP and cross-layer interactions to improve the hard HO in WiMAX is proposed.
Abstract: The IEEE 802.16e/WiMAX standards introduced the micro and macro-mobility capabilities as a promising technology. While the procedures for mobility management are defined, the decision on performing the handover is left to the developers. The paper proposes a SIP-based solution for terminal mobility and real-time applications, using SIP and cross-layer interactions to improve the hard HO in WiMAX.

5 citations