Euijik Kim

Machine-to-machine platform architecture for horizontal service integration

Nowadays, machine-to-machine (M2M) communication is being considered as the most promising solution for revolutionizing the future intelligent pervasive applications. This article presents the design of an M2M service platform architecture and prototype implementation of a home automation system based on the designed M2M platform. The proposed service platform consists of three subsystems: M2M service enablement, M2M device management, and M2M communication management. These subsystems include the essential function blocks and interact with each other to horizontally accommodate various M2M applications. The prototype implementation of the full “smart home automation” system, including the M2M service platform, M2M area network, and user/administrator domains, shows the feasibility of the proposed M2M platform architecture.

Joint routing and scheduling in multi-channel capillary machine-to-machine networks

In recent times, machine-to-machine (M2M) communication is considered the most promising solution for revolutionizing future intelligent pervasive applications. The capillary M2M network is a key component of the M2M system, and it should support a data rate that is sufficient to accommodate various vertical applications with limited resources of end devices. This paper presents a joint routing and scheduling (JRS) framework for a capillary M2M network. To achieve the conflicting goals of maximizing network performance and conserving energy, the JRS framework is designed with an integrated concept of routing and transmission scheduling, which provides time division multiple access (TDMA)-based transmission scheduling based on the established routing path of data. Moreover, to extend the number of available transmission frames and enhance network performance, JRS uses the multi-channel communication approach. Experimental results of the prototype implementation demonstrate that JRS outperforms conventional schemes, even under heavy traffic conditions.

Integrated hybrid MAC and topology control scheme for M2M area networks

This paper presents the design and performance evaluation of an integrated hybrid MAC and topology control scheme (abbreviated IMTC) for machine-to-machine (M2M) area networks that require comparatively the high data rate communications. In order to maximize the network performance, IMTC is designed with a cross-layer concept of MAC and network layers, which provides the multi-channel TDMA scheduling based on the information of network topology optimized by transmission power control. Simulation results show that by using the proposed scheme, the network throughput and the energy efficiency can be significantly improved.

Integrated multicast routing algorithms considering traffic engineering for broadband IPTV services

With the rapid growth of broadband network deployment and multimedia streaming development, Internet protocol (IP) multicast networks have become a delivery mechanism for Internet protocol television (IPTV). IPTV provides a two-way interactive service to the viewers, which generates the path request for IP multicast network. Thus, it is essential to evaluate the path rejection probability accurately and further to reduce it. In this paper, we propose a new dynamic multicast routing algorithm for broadband IPTV services and apply it to three legacy algorithms. These integrated multicast routing algorithms support the minimum cost and the traffic engineering features, in order to maximize the acceptance rate for bandwidth constraint path request under IPTV service environments. Furthermore, we compare their network performances in terms of the acceptance rate and delay by experimental simulations. The simulation result gives us that the nearest node first Dijkstra algorithm can be the optimal solution of multicast connection for IPTV service delivery.