Author Tajima, Shigeto| Funabiki, Nobuo| Higashino, Teruo|
Abstract Nowadays, various types of access-points (APs) and hosts such as dedicated APs, laptop personal computers (PCs), and mobile terminals have been used in IEEE802.11 wireless local-area networks (WLANs). As a result, the optimal assignment of holding APs with different types into the network field, depending on the host type distribution, has become another important task to design high-performance WLANs. In this paper, we first define this holding access-point assignment problem as a combinatorial optimisation problem and propose its two-phase heuristic algorithm. Then, since plural partially overlapping channels are available in IEEE802.11 WLANs, we present the channel assignment extension to the APs such that the communication time of the APs is minimised, and the model to estimate the communication time increase by interferences. The effectiveness of our proposal is verified through simulations in six instances using the WIMNET simulator.
Keywords wireless local-area network WLAN holding access-point partially overlapping channel assignment algorithm combinatorial optimisation problem
Note This fulltext will be available in Apr 2019
Published Date 2018-04-10
Publication Title International Journal of Space-Based and Situated Computing
Volume volume8
Issue issue1
Publisher INDERSCIENCE ENTERPRISES
Start Page 50
End Page 58
ISSN 2044-4893
Content Type Journal Article
language 英語
OAI-PMH Set 岡山大学
File Version author
DOI 10.1504/IJSSC.2018.091196
Web of Sience KeyUT 000437395700006
Related Url isVersionOf https://doi.org/10.1504/IJSSC.2018.091196
FullText URL Int_J_Spce_Situat_Comput_7_3_145.pdf
Author Khin Khin Zaw| Funabiki, Nobuo|
Abstract To advance Java programming educations, we have developed the web-based Java programming learning assistant system (JPLAS) that provides the code writing problem. This problem asks a student to write a source code for a given assignment, where the correctness is verified by running the test code on JUnit. In this paper, we propose a design-aware test code approach for the code writing problem. The design-aware test code tests any important method in the model source code that has the advisable design for the assignment. Thus, by writing a code that can pass it, a student is expected to implement the code with the proper classes/methods in the model code. In evaluations of the proposal, all the students could complete highly qualitative codes for five graph algorithms using the design-aware test codes, where the code quality metrics were measured by metrics plugin for Eclipse.
Keywords Java programming learning assistant system JPLAS design-aware test code JUnit metric plugin breadth-first-search BFS
Published Date 2017-12-29
Publication Title International Journal of Space-Based and Situated Computing
Volume volume7
Issue issue3
Publisher INDERSCIENCE ENTERPRISES
Start Page 145
End Page 154
ISSN 2044-4893
Content Type Journal Article
language 英語
OAI-PMH Set 岡山大学
File Version author
DOI 10.1504/IJSSC.2017.089006
Related Url isVersionOf https://doi.org/10.1504/IJSSC.2017.089006