Hiroyuki Yomo

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This paper introduces and analyzes relaying techniques that increase the achievable throughput in multi-hop wireless networks by applying network coding over bi-directional traffic flows. We term each such technique as Bi-directional Amplification of Throughput (BAT)-relaying. While network coding is normally performed by combining decoded packets, here we(More)
This paper considers relaying techniques that increase the achievable throughput in multi–hop wireless networks by taking advantage of the bi–directional traffic flow. Such a relaying technique is termed relaying with Bi–directional Amplification of Throughput (BAT–relaying). The BAT–relaying is utilizing the concept of anti–packets, defined for(More)
In wireless networks, the shared broadcast medium enables interactions among nodes and thus introduction of novel communication modes. This paper introduces and analyzes relaying techniques that increase the achievable throughput in multi– hop wireless networks by taking advantage of the bi–directional traffic flow. Such a relaying technique is termed(More)
This paper addresses a scheduling problem for wireless network coding which has been recently proposed as a novel method to enhance the throughput in wireless networks. The wireless network coding involves broadcast transmission of a network–coded packet which contains unicast data to several receiving nodes. These receiving nodes have time–varying fading(More)
This paper studies various cooperative diversity schemes for orthogonal frequency division multiple access (OFDMA)- time division duplex (TDD) based two-hop cellular networks in low mobility scenarios, where the instantaneous channel state information is available at the base station. A user scheduling and radio resource allocation technique is developed in(More)
As the wireless personal area network (WPAN) gets utilized by more individuals, the interference that collocated WPANs cause to each other, termed self-interference, will be one of the major sources that degrade WPAN's communication performance. The conventional adaptive frequency hopping (AFH) strategies avoid frequency-static interference by reducing the(More)
∗ This paper describes work undertaken partly in the context of the IST-2001-34157 Power aware Communications for Wireless OptiMised personal Area Network (PACWOMAN). The IST program is partially funded by the EC. Abstract--Short-range wireless systems have recently gained a lot of attention to provide seamless, multimedia communications around a(More)
Recent investigations show that access points (APs) of wireless local area networks (WLANs) are idle during much of the time and that an AP in its idle state still consumes a large percentage of power. Wake-up receivers can be used to realize radio-on-demand WLANs, activating APs from the sleep mode only in times of active data communications. A wake-up(More)