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A Multi-channel MAC Protocol with Power Control for Ad hoc Networks
Dang Ngoc Minh Duc,Choong Seon Hong 한국정보과학회 2011 한국정보과학회 학술발표논문집 Vol.38 No.2D
The medium access control (MAC) protocol is designed only for single channel in the IEEE 802.11 standard. That means the throughput of the network is limited by the bandwidth of the channel. The multi-channel can be exploited to get more concurrent transmission. Our new scheme of Multi-channel MAC protocol with Power Control named MMAC-PC can avoid the multi-channel hidden terminal problem as well as improve the performance of the network.
Performance Analysis of IEEE 802.11p MAC Protocol in VANETs
Duc Ngoc Minh Dang(단넉민덕),Choongseon Hong(홍충선),Sungwon Lee(이성원),Jongwon Choe(최정원) 한국정보과학회 2014 정보과학회 컴퓨팅의 실제 논문지 Vol.20 No.1
VANET(Vehicular Ad hoc Networks)는 운전의 안전성, 편안함과 효율성을 향상시키는 지능형 교통 시스템(ITS: Intelligent Transportation System)을 위한 기술로 각광받고 있다. IEEE 802.11p/WAVE는 VANET에서 무선 접속을 지원하는 것을 목표로 하는 표준이다. IEEE 802.11p/WAVE MAC은 긴급을 요하는 트래픽을 위한 신뢰성 있는 브로드캐스팅과 성능적인 면에서 서비스 트래픽을 위해 높은 전송률을 지원해야 한다. 따라서 본 논문에서는 2-D 마코브 체인 모델을 사용하여 IEEE 802.11p에서 포화상태의 성능을 분석하고자 한다. 수치적인 결과를 통해 서비스 트래픽의 포화상태 처리량, 패킷 전송률, 그리고 긴급 트래픽의 평균 지연율과 같은 파라미터들이 망 성능에 어떻게 영향을 미치는지 확인할 수 있다. Vehicular Ad hoc Network (VANET) is emerging as a potential technology for the Intelligent Transportation System (ITS) to enhance the safety, comfort and efficiency of driving. The IEEE 802.11p/ WAVE is a standard intended to support wireless access in VANETs. The IEEE 802.11p/WAVE MAC needs to provide the reliable broadcast for emergency traffic and high throughput for service traffic as the performance metrics. Accordingly, in this paper we study on the saturation performance of the IEEE 802.11p by using the 2-D Markov chain model. The numerical results show how the network parameters impact the network performance: normalized saturation throughput of service traffic; packet delivery ratio and average delay of emergency traffic.
An Efficient and Reliable MAC in VANETs
Duc Ngoc Minh Dang,Choong Seon Hong,Sungwon Lee,Eui-Nam Huh IEEE 2014 IEEE communications letters Vol.18 No.4
<P>Vehicular Ad hoc Network (VANET) is developed to enhance the safety, comfort and efficiency of driving. The IEEE 802.11p/WAVE and IEEE 1609.4 family are standards intended to support wireless access in VANETs. In this paper, we propose an Efficient and Reliable MAC protocol for VANETs (VER-MAC) which allows nodes to broadcast safety packets twice during both the control channel interval and service channel interval to increase the safety broadcast reliability. By using the additional data structures, nodes can transmit service packets during the control channel interval to improve the service throughput.</P>
A SINR-Based MAC Protocol for Wireless Ad Hoc Networks
Duc Ngoc Minh Dang,Choong Seon Hong,Sungwon Lee,Jaejo Lee IEEE 2012 IEEE communications letters Vol.16 No.12
<P>In this paper, we propose a power control MAC protocol that improves the spatial reuse of wireless channels and the energy efficiency for the wireless nodes. The main idea is to adopt IEEE 802.11 Power Saving Mechanism (PSM) with the appropriate power control scheme for the wireless ad hoc networks. All control messages containing the transmission power information are transmitted at the maximum transmission power in the Announcement Traffic Indication Message (ATIM) window while the data packets are sent at the minimum required transmission power during the data window. Based on the sensing power or the transmission power information of the control messages, a neighbor node checks whether it can transmit simultaneously. Simulation results show the advantages of the proposed protocol in terms of the aggregate throughput, average delay, energy efficiency and fairness index.</P>
[우수논문] A Novel Multi-channel MAC Protocol for Ad hoc Networks
Duc Ngoc Minh Dang,Nguyen Tran Quang,Choong Seon Hong 한국정보과학회 2012 한국정보과학회 학술발표논문집 Vol.39 No.1D
The medium access control (MAC) protocol is designed only for single channel in the IEEE 802.11 standard. That means the throughput of the network is limited by the bandwidth of the single channel. The multiple channels can be exploited to get more concurrent transmission. In this paper, we propose a novel Multi-channel MAC that utilizes the channel more efficiently than other Multi-channel MAC protocols.