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On Routing Protocol and Metric for Multiradio Multichannel WMNs
고휘(Hui Gao),이형옥(Hyung-Ok Lee),남지승(Ji-Seung Nam) 한국컴퓨터정보학회 2012 한국컴퓨터정보학회 학술발표논문집 Vol.20 No.1
Wireless mesh networks are considered a promising solution to last mile broadband. The unique characteristics of WMN impose unique requirements on designing routing protocols and metrics for WMN. However, existing routing schemes that are designed for single-channel multi-hop wireless networks may lead to inefficient routing paths in multichannel. This paper focuses on the routing problem for multi-radio multichannel WMNs. We list the challenges in designing routing algorithms for multi-radio multichannel WMNs. Then we examine the requirements and considerations for designing routing metrics according to the characteristics of multi-radio multichannel WMNs. Finally we survey and investigate the existing routing metrics in terms of their ability to satisfy these requirements.
Understanding Channel-diversity Oriented Routing Metrics for Multicast in Wireless Mesh Networks
고휘 ( Hui Gao ),남지승 ( Ji-seung Nam ) 한국정보처리학회 2013 한국정보처리학회 학술대회논문집 Vol.20 No.1
Issues on design of routing scheme and routing metric for multicast in multi-channel multi-radio (MCMR) wireless mesh networks (WMNs) are discussed. Emphasis is placed on channel-diversity oriented routing metrics. From case study the conclusion to be drawn is that the key for design of channel-diversity oriented routing metrics is how to construct an optimization function to quantify interdependence between channel assignment and multicast routing throughput.
Multipath Routing for Load Balancing in Wireless Mesh Network
고휘 ( Hui Gao ),곽용완 ( Young-wan Kwag ),이형옥 ( Hyung-ok Lee ),남지승 ( Ji-seung Nam ) 한국정보처리학회 2013 한국정보처리학회 학술대회논문집 Vol.20 No.2
Multipath routing is proposed to perform better load balancing and to provide high fault tolerance. In this paper common factors on multi-path routing for WMNs are discussed and joint multi-channel and multipath routing approaches for load balancing are introduced at the same time. The key issues on how to design an effective multi-path routing protocol with appropriate performance metrics for WMNs are also discussed through the case studies in the paper
A Scheme of Channel Diversity Load Balancing Consideration for Path Selection in WMNs
고휘 ( Hui Gao ),곽용완 ( Young-wan Kwag ),이형옥 ( Hyung-ok Lee ),남지승 ( Ji-seung Nam ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.1
This paper proposes a channel diversity based load-balancing cross-layer routing scheme for Wireless Mesh Networks (WMNs). The proposed scheme deals with channel diversity phase and load balancing phase in WMNs. Channel diversity factor metric<sub>ch-d</sub> and load balancing factor f<sub>load</sub> are defined and employed cooperatively as a combined path selection policy.
Design of Routing Protocols for WMN: Factors and Case Study
고휘 ( Hui Gao ),이형옥 ( Hyung-ok Lee ),곽용완 ( Young-wan Kwag ),남지승 ( Ji-seung Nam ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.2
Wireless Mesh Network (WMN) can be defined as a communication network consisting of radio nodes organized in a mesh topology, which has been attracting much attention due to its promising technology. This paper addressed the factors on how to design routing protocols for WMN. 2 examples of designing routing metric and routing algorithm are given for case study. With consideration of those factors such as wireless broadcast advantage (WBA)/channel assignment (CA) or intra-flow/inter-flow interference high throughput is achieved.
고휘 ( Hui Gao ),이형옥 ( Hyung-ok Lee ),곽용완 ( Young-wan Kwag ),남지승 ( Ji-seung Nam ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.2
Research on 4A(Any-time, Any-where, Any-device, Any-contents) services for the next-generation multimedia services is developed with the trend of the integration of wire and wireless networks and the convergence of telecommunications and broadcasting. In this paper we proposed a design of SVC(Scalable Video Coding) overlay multicast mechanism which can provide typical next-generation multimedia services such as SVC streaming. A novel overlay multicast algorithm called ACK-Flow tree optimization algorithm is proposed to guarantee SVC streaming with high efficiency.
A Study on WMNs Based Routing Metrics for High Throughput Multicast
고휘 ( Hui Gao ),곽용완 ( Young-wan Kwag ),이형옥 ( Hyung-ok Lee ),박준석 ( Jun-seok Park ),남지승 ( Ji-seung Nam ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.2
There has been growing interest in multicast technologies for wireless mesh networks with increasing demand for enjoying seamless multimedia broadcast service such as mobile IPTV anytime anywhere for any content on any device. This paper addressed the factors that should be considered when designing multicast algorithm in WMNs. Several routing metrics which are adapted for WMNs based multicast are described in detail to show that the main design goal for multicast metric is to achieve high throughput. Those metrics that take into account the characteristics of WMNs such as wireless broadcast advantage or channel diversity can arrange load balancing more effectively.
A Scheme of 3D Objects Viewing and Editing System
고휘 ( Hui Gao ),강미영 ( Mi-young Kang ),남지승 ( Ji-seung Nam ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1
In this paper, we introduce a general method for constructing 3D models viewing, editing and synthesizing system, including the practical algorithms that are necessary in 3D animation and game programming. While at the same time, the user’s customized acquirements are considered in our system by providing a flexible and friendly interface. Also 3D objects file formats and the method for writing 3D file sparser and loader program are introduced.
A Study on Multicast Routing Metric for Wireless Mesh Network
고휘(Hui Gao),이형옥(Hyung-Ok Lee),남지승(Ji-Seung Nam) 한국컴퓨터정보학회 2012 한국컴퓨터정보학회 학술발표논문집 Vol.20 No.1
This paper gives an introduction to multicast in wireless mesh networks. The factors to be addressed when designing a multicast protocol for wireless mesh network are presented. Emphases are paid on selection of multicast routing metrics in wireless mesh networks. Also details of adapting these metrics to gain high-throughput multicast in wireless mesh network are described in the paper.