label: url

en: アドホックネットワークにおけるノード移動性推定に基づく適応型ネットワークコーディングを用いたブロードキャスト

en: The Transactions of the Institute of Electronics, Information and Communication Engineers B

ja: 電子情報通信学会論文誌(B)


en: Performance Analysis of IEEE 802.15.4 Bootstrap Process

en: Electronics

ja: Electronics


en: Adaptive Network Coding based on Node Mobility for Broadcasting in Mobile Ad-hoc Networks

en: Mobile ad-hoc networks (MANETs) have limited network resources such as node battery capacity and wireless frequency bands. Therefore, to ensure efficient broadcast communication in such networks, it is critical to reduce unnecessary packet transfers and maximize the use of network resources and power. Network coding (NC) is a technique for reducing the number of transmitted packets over a network and maximizing the use of devices and network resources. The packet-reduction benefits obtained using NC depend considerably on network topology. In this study, we propose an NC method particularly designed for MANETs. In our approach, the nodes switch the type of transmission between an uncoded transmission (simple broadcast) and a coded transmission (NC) based on the estimated neighboring node's proximity. The effectiveness of the proposed method was evaluated using computer simulations. Our evaluations demonstrated that the proposed method can reduce the number of packets in the network without decreasing the packet delivery rate.

en: International Journal of Networking and Computing


en: Collaborative Defense Techniques Against MANETs Malicious Nodes

en: Blackhole (BH) attacks are among the most significant threats in mobile ad-hoc networks. A BH is a security attack in which a malicious node absorbs data packets and sends fake routing information to neighboring nodes. BH attacks have been widely studied. However, existing defense methods wrongfully assume that BH attacks cannot overcome the most common defense approaches. A new wave of BH attacks is known as smart BH attacks. In this study, we used a highly aggressive type of BH attack that can predict sequence numbers to overcome traditional detection methods that set a threshold to sequence numbers. To protect the network from this type of BH attack, we propose a collaborative defense method that uses local information collected from neighboring nodes. We evaluated the performance of our defense method against a smart BH attack and a collaborative attack that uses the collaboration of another malicious node. Our results show that the proposed method successfully detects and contains these threats to some degree. Consequently, the smart BH attack success rate decreases.

ja: International Journal of Networking and Computing


en: IEEE 802.15.4 Now and Then: Evolution of the LR-WPAN Standard

en: ICACT Transactions on Advanced Communications Technology (TACT)


en: Zone-based Energy Aware Data Collection Protocol for WSNs

en: IEICE Transactions on Communications

ja: IEICE Transactions on Communications