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논문 기본 정보
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- 학술저널
- 저자정보
- 발행연도
- 2014.4
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- 1 - 13 (13page)
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In IEEE 802.11p/1609-based vehicular networks, vehicles are allowed to exchange safety and control messages only within time periods, called control channel (CCH) interval, which are scheduled periodically. Currently, the length of the CCH interval is set to the fixed value (i.e. 50ms). However, the fixed-length intervals cannot be effective for dynamically changing traffic load. Hence, some protocols have been recently proposed to support variable-length CCH intervals in order to improve channel utilization. In existing protocols, the CCH interval is subdivided into safety and non-safety intervals, and the length of each interval is dynamically adjusted to accommodate the estimated traffic load. However, they do not consider the presence of hidden nodes. Consequently, messages transmitted in each interval are likely to overlap with simultaneous transmissions (i.e. interference) from hidden nodes. Particularly, life-critical safety messages which are exchanged within the safety interval can be unreliably delivered due to such interference, which deteriorates QoS of safety applications such as cooperative collision warning. In this paper, we therefore propose a new interference-aware Dynamic Safety Interval (DSI) protocol. DSI calculates the number of vehicles sharing the channel with the consideration of hidden nodes. The safety interval is derived based on the measured number of vehicles. From simulation study using the ns-2, we verified that DSI outperforms the existing protocols in terms of various metrics such as broadcast delivery ration, collision probability and safety message delay.
목차
Abstract
1. Introduction
2. Related works
3. DSI : Dynamic Safety Interval
4. Performance evaluation
5. conclusion
References
참고문헌 (13)
참고문헌 신청
1. [학술대회논문] - H. Yoo. / 2012 / A Dynamic Safety Interval Protocol for VANETs / Proc. of ACM RACS 2012
2. [기타자료] - / 2007 / IEEE P802.11p/D3.0, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Amendment: Wireless Access in Vehicular Environments (WAVE), Draft 3.0
3. [기타자료] - / 2010 / IEEE Trial-Use Standard for Wireless Access in Vehicular Environments (WAVE) - Multi-Channel Operation / IEEE Std, 1609.4-2010
4. [학술대회논문] - L. Liu. / 2009 / An adaptive multi-channel MAC protocol with dynamic interval division in vehicular environment / Proc. of ICISE 2009 12
5. [학술지(정기간행물)] - Q. Wang. / 2012 / An IEEE 802. 11p-Based Multichannel MAC Scheme With Channel Coordination for Vehicular Ad Hoc Networks / IEEE Transactions on Intelligent Transportation Systems 13 (2) : 449 ~ 458
2. [기타자료] - / 2007 / IEEE P802.11p/D3.0, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Amendment: Wireless Access in Vehicular Environments (WAVE), Draft 3.0
3. [기타자료] - / 2010 / IEEE Trial-Use Standard for Wireless Access in Vehicular Environments (WAVE) - Multi-Channel Operation / IEEE Std, 1609.4-2010
4. [학술대회논문] - L. Liu. / 2009 / An adaptive multi-channel MAC protocol with dynamic interval division in vehicular environment / Proc. of ICISE 2009 12
5. [학술지(정기간행물)] - Q. Wang. / 2012 / An IEEE 802. 11p-Based Multichannel MAC Scheme With Channel Coordination for Vehicular Ad Hoc Networks / IEEE Transactions on Intelligent Transportation Systems 13 (2) : 449 ~ 458
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UCI(KEPA) : I410-ECN-0101-2015-004-001420118