Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Chikara Ohta"'
Publikováno v:
IEEE Access, Vol 12, Pp 92348-92367 (2024)
In current mobile communication networks, handover substantially influences the performance of heterogeneous networks (HetNet). The decision process and trigger timing of the handover decision algorithm (HDA) are integral aspects of handover and are
Externí odkaz:
https://doaj.org/article/16428ba462ce4d779617f5e7ee317a56
Publikováno v:
IEEE Access, Vol 12, Pp 45164-45175 (2024)
In outdoor positioning, the global positioning system (GPS) is currently the most commonly used method. Considering the power consumption required to use GPS, it may not be efficient for tracking in smaller areas, such as outdoor grazing areas in Jap
Externí odkaz:
https://doaj.org/article/f1fd9158d6e24d1cb24af10748956496
Publikováno v:
IEEE Access, Vol 12, Pp 8110-8122 (2024)
Wireless sensor networks are a collection of tiny sensor devices powered by energy-scarce batteries. Depending on the nature of the application, those tiny devices might be deployed in areas that make it difficult to recharge or change their battery.
Externí odkaz:
https://doaj.org/article/8c366954389f480bbc57bc1e909d782f
Autor:
Yumi Takaki, Makoto Ando, Keisuke Maesako, Keisuke Fujita, Tomio Kamada, Chikara Ohta, Hisashi Tamaki
Publikováno v:
International Journal of Distributed Sensor Networks, Vol 14 (2018)
In wireless multihop bidirectional communication environment, there is a possibility that packet collision and retransmission owing to the hidden node problem decrease efficiency of throughput. The aim of this article is to achieve efficient and reli
Externí odkaz:
https://doaj.org/article/2d13a262b3fe40298658ef6b06004265
Publikováno v:
International Journal of Distributed Sensor Networks, Vol 12 (2016)
In severe disaster environments, data-gathering wireless sensor networks possibly suffer from spatial node failure due to external factors such as land slide and river overflow. In order to enhance tolerance to spatial node failure, this paper propos
Externí odkaz:
https://doaj.org/article/e980375895964dcc899c4b7c1bd388a1
Publikováno v:
Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol 4, Iss 3, Pp 651-663 (2010)
In this paper, an approach to complement legacy rules for the elevator operation is proposed. The approach is derived from the analysis that the elevator operation in the real world often obeys a heuristic rule, and such a rule can be divided into a
Externí odkaz:
https://doaj.org/article/e681ce5b59e342de844a11bbe4c7b712
Publikováno v:
IEICE Communications Express. 12:333-338
Publikováno v:
IEICE Communications Express. 11:748-753
As IoT devices spread, real-time data analysis and notification are increasingly important. To achieve low latency notifications in edge environments, we have proposed a distributed publish-process-subscribe system that allows multiple edge servers t
Publikováno v:
IEICE Communications Express. 11:625-629
Autor:
Chikara Ohta, Taiyo Tanaka, Hajime Migita, Shuji Yamaguchi, Makoto Takenaka, Patrick Finnerty, Tomio Kamada
Publikováno v:
IEICE Communications Express. 11:429-434
This paper proposes a polling-scheduling for UWB-based in-vehicle networks. The proposed scheduling aims to reduce the preamble overhead by aggregating periodic data readout of the in-vehicle sensors. Experimental results show that the proposed sched