Tomoko Adachi

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The standardization of IEEE802.11n which aims to achieve 100 Mbps at MAC-SAP (medium access control - service access point) is under work in IEEE802.11, wireless LAN standardization committee. The frame aggregation scheme in which MAC (medium access control) frames are aggregated into one PHY (physical) frame is proposed for IEEE802.11n, because it(More)
The authors have proposed a dual mode system for indoor mobile communication [l]. Mobile terminals (MTs) in this system communicate with each other directly or via BSs. The former mode is regarded as ad-hoc mode and the latter, as cellular mode. The decision which mode to use is given at an MT comparing the received power level from its partner and a base(More)
The standardization of IEEE802.11n aims to achieve 100 Mbps at MAC-SAP (medium access control - service access point). The frame aggregation scheme in which MAC (medium access control) frames are aggregated into one PHY (physical) frame is proposed as the main MAC technique of IEEE802.11n, because it decreases MAC overhead. The block ack mechanism of(More)
IEEE 802.11 is widely known as a standard of WLAN and has a number of amendments and supplements. The one now attracting a great deal of attention is IEEE 802.11n, which is aimed at achieving high throughput. To achieve high throughput, one of the main discussion points is the channel bundling method which extends the channel bandwidth from 20 MHz to 40(More)
This paper proposes two energy-efficient standby mode algorithms in short-range one-to-one 60 GHz millimeter wave (mmWave) communications. Among the many usage scenarios for mmWave radio, file downloading from kiosk terminals or peer-to-peer sync service with portable terminals are of great interest. For these portable terminals, the power consumption of(More)
HpcG catalyses the hydration of a carbon-carbon double bond without the aid of any cofactor other than a simple divalent metal ion such as Mg(2+). Since the substrate has a nearby carbonyl group, it is believed that it first isomerises to form a pair of conjugated double bonds in the enol tautomer before Michael addition of water. Previous chemical studies(More)
The design of large disk array architectures leads to interesting combinatorial problems. Minimizing the number of disk operations when writing to consecutive disks leads to the concept of “cluttered orderings” which were introduced for the complete graph by Cohen et al. (2001). Mueller et al. (2005) adapted the concept of wrapped Δ-labellings to the(More)