JURNAL INFOTEL https://ejournal.st3telkom.ac.id/index.php/infotel <h2>About Jurnal INFOTEL</h2> <table border="0"> <tbody> <tr> <td><img src="http://ejournal.st3telkom.ac.id/public/site/images/journaladmin/cover_infotel.png" alt="telecommunication journal" width="180" height="250"></td> <td align="justify" valign="top"> <div style="background-color: #ebfeec; border: 1px solid #bae481; border-radius: 5px; text-align: justify; padding: 10px; font-family: sans-serif; font-size: 14px; margin-left: 10px;">Jurnal INFOTEL is a scientific journal published by Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) of Institut Teknologi Telkom Purwokerto, Indonesia. Jurnal INFOTEL covers the field of <strong>informatics, telecommunication, and electronics</strong>. First published in 2009 for a printed version and published online in 2012. The aims of Jurnal INFOTEL are to disseminate research results and to improve the productivity of scientific publications. Jurnal INFOTEL is published quarterly in February, May, August and November. <strong>Starting in 2018, Jurnal INFOTEL uses English as the primary language..</strong></div> </td> </tr> </tbody> </table> <h4><strong><span style="text-decoration: underline; color: #ff0000;">Call for Editors and Reviewers</span></strong></h4> <div style="text-align: justify;"> <p>We invite researchers, scientists, and practitioners to become editors or reviewers in Jurnal INFOTEL. If you are interested, please send us information about yourself, such as your full name, education and degree, affiliation, Scopus ID, orcid ID or other researcher ID, and the area of expertise. Send your biodata via the link below.</p> <p><a href="https://docs.google.com/forms/d/1z8am_OQpUPdDtX93QYcSzv6J5tCd3xoAAN5TWCdNqxU/edit?usp=sharing"><strong>Register for Editor and Reviewer</strong></a><br>Thank you.</p> <h4><strong>Important For Authors</strong></h4> <p>Reminder for all the authors, you are expected to submit papers that:<br> 1. are original and have not been submitted to any other publication.<br> 2. have at least 15 references with 80% of scientific Journals.<br> 3. use references published on the last 5 years.<br> 4. structured using IMRaD format.<br> 5. use template specified by Jurnal INFOTEL.<br> 6. use reference manager e.g. Mendeley or others when managing the references.<br>Thank you</p> <p>&nbsp;</p> </div> LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO en-US JURNAL INFOTEL 2085-3688 <p>Authors who publish with this journal agree to the following terms:</p> <ul> <li style="text-align: justify;">Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="http://creativecommons.org/licenses/by/3.0/" target="_new">Creative Commons Attribution License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li> <li style="text-align: justify;">Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li> <li style="text-align: justify;">Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work&nbsp;</li> </ul> Cross-site Scripting Attack Detection Using Machine Learning with Hybrid Features https://ejournal.st3telkom.ac.id/index.php/infotel/article/view/606 <p>This study aims to measure the classification accuracy of XSS attacks by using a combination of two methods of determining feature characteristics, namely using linguistic computation and feature selection. XSS attacks have a certain pattern in their character arrangement, this can be studied by learners using n-gram modeling, but in certain cases XSS characteristics can contain a certain meta and synthetic this can be learned using feature selection modeling. From the results of this research, hybrid feature modeling gives good accuracy with an accuracy value of 99.87%, it is better than previous studies which the average is still below 99%, this study also tries to analyze the false positive rate considering that the false positive rate in attack detection is very influential for the convenience of the information security team, with the modeling proposed, the false positive rate is very small, namely 0.039%</p> Dimaz Arno Prasetio Kusrini Kusrini M. Rudyanto Arief ##submission.copyrightStatement## http://creativecommons.org/licenses/by-sa/4.0 2021-02-28 2021-02-28 13 1 10.20895/infotel.v13i1.606 A User Recommendation Model for Answering Questions on Brainly Platform https://ejournal.st3telkom.ac.id/index.php/infotel/article/view/548 <p>Brainly is a Community Question Answer (CQA) application that allows students or parents to ask questions related to their homework. The current mechanism is that users ask questions, then other users who are in the same subject interest can see and answer it. As a reward for answering questions, Brainly gives points. The number of points varies by question. The greater of total points users have, Brainly will automatically display them in the smartest user leaderboard on the site's front page. But sometimes, some users do not have good activity in answering questions. Thus, it is possible to have an urgent question that has not been answered by anyone. This study implements Fuzzy C-Means cluster method to improve Brainly's feature regarding the speed and accuracy of answers. The idea is to create student clusters by utilizing the smartest students' leaderboard, subjects interest, and answering activities. The stages applied in this research started with Data Extraction, Preprocessing, Cluster Process, and User Recommender. The optimal number of clusters in the answerer recommendation in the Brainly platform is 2 clusters. The value of the fuzzy partition coefficient for two clusters reached 0.97 for Mathematics and 0.93 for Indonesian. Meanwhile, the results of the recommendations were influenced by answer ratings. Many numbers of the answer are not given rating because the possibility of the answers are not appropriate or user's insensitivity in giving ratings.</p> Puji Winar Cahyo Kartikadyota Kusumaningtyas Ulfi Saidata Aesyi ##submission.copyrightStatement## http://creativecommons.org/licenses/by-sa/4.0 2021-02-28 2021-02-28 13 1 10.20895/infotel.v13i1.548 Rain Effect to A 60 GHz Broadband Wireless System’s Performance: Study Case In Purwakarta https://ejournal.st3telkom.ac.id/index.php/infotel/article/view/556 <p>Nowadays, world wide telecommunication researchers are developing 5G technology. One of most important key technology in 5G is Milimeter-Wave (mmWave). This study measure 60 GHz broadband wireless system performance because of it’s promising potentials. However, the use of these frequencies is quite sensitive to rain that resulting an atenuation in the channel. Therefore, this study proposes two schemes to address the problem. The first scheme is the use of QAM modulation (Quadrature Amplitude Modulation) and the second scheme is an addition of LDPC (Low Density Parity Check) code techniques. From the results of this study, by using 4-QAM modulation and LDPC coderate 1/2, the broadband wireless system’s performance on the second scheme is better compared to the first scheme with 8.33 dB Signal to Noise Ratio (SNR) value to provides BER (Bit Error Rate) 10<sup>-4</sup></p> Endah Setyowati Galura Muhammad Suranegara Ichwan Nul Ichsan ##submission.copyrightStatement## http://creativecommons.org/licenses/by-sa/4.0 2021-02-28 2021-02-28 13 1 10.20895/infotel.v13i1.556 Planning of Indoor Femtocell Network for LTE 2300 MHz on Railways Carriages Using Radiowave Propagation Simulator 5.4 https://ejournal.st3telkom.ac.id/index.php/infotel/article/view/542 <p>The&nbsp;indoor&nbsp;communication&nbsp;system is a system to solve the problem of weak signals received by placing a&nbsp;Femtocell Access Point&nbsp;(FAP) indoor area.&nbsp;The design of an&nbsp;indoor&nbsp;cellular communication network system&nbsp;is&nbsp;carried out using the&nbsp;Radiowave Propagation Simulator&nbsp;5.4.&nbsp;The parameters observed were&nbsp;Received Signal Level&nbsp;(RSL) and&nbsp;Signal to Interface Ratio (SIR).&nbsp;The case study is the passenger carriage of the executive, business and economy passenger class.&nbsp;The research includes&nbsp;link budget&nbsp;calculations based on&nbsp;coverage&nbsp;and&nbsp;capacity&nbsp;by considering the type of train carriage material and train passenger capacity.&nbsp;The calculation results based on&nbsp;capacity&nbsp;obtained 1 FAP for executive and business class train passenger cars, while economy class train passenger cars obtained 2 FAP.&nbsp;The best scenario for&nbsp;executive class namely scenario 1A,&nbsp;the receiver gets average RSL of approximately -32.26 dBm and&nbsp;SIR of&nbsp;0 dB. The best scenario for business class namely scenario&nbsp;2A, the receiver gets average RSL of approximately -32.57 dBm and&nbsp;SIR of 0 dB.&nbsp; The best scenario for&nbsp;economy class namely scenario&nbsp;3A,&nbsp;the receiver gets average RSL of approximately -29.80 dBm and the receiver gets average SIR of approximately 6.97 dB</p> Adisti Nabilah Naufallia Anggun Fitrian Isnawati Khoirun Ni’amah ##submission.copyrightStatement## http://creativecommons.org/licenses/by-sa/4.0 2021-02-28 2021-02-28 13 1 10.20895/infotel.v13i1.542 Cellular Communication Propagation at Drone around Building Environment with Single Knife Edge at 10 GHz https://ejournal.st3telkom.ac.id/index.php/infotel/article/view/541 <p>The drone communication systems used a cellular network for controlling a drone from a long distance. That communication propagations between drone and base station were analyzed. The drone moved at the track around building environment. That environment used variations in building height. The communication propagation around building environment caused diffraction mechanism. Single knife edge method is used for that diffraction mechanism. The frequency of communication used 10 GHz. That frequency was influenced by atmospheric attenuation. This research was using some variations such as height of drone track location, transmitter power, and AMC (Adaptive Modulation Coding). MCS (Modulation Coding Scheme) was used AMC such as QPSK, 16 QAM, and 64 QAM. Some result was obtained at this research consist of LOS and NLOS distance, SNR, MCS probability, and percentage of drone coverage. NLOS propagation was caused by building height. The SNR value become increase when higher at drone position, such as drone was moving at 20 meters with height of flying drone 80 m and transmitter power 30 dBm obtained SNR 38.21 dBm. That SNR is affected AMC, so a higher SNR value increases AMC. The drone’s coverage 100%, with a height of flying drone 80 meters and transmitter power of 30 dBm. That condition showed more increasing coverage percentage than 64.8% for height of flying drone 20 meters and transmitter power 30 dBm. That result showed that more drone height increased of coverage percentage, probability modulation, and SNR value.</p> Andrita Ceriana Eska ##submission.copyrightStatement## http://creativecommons.org/licenses/by-sa/4.0 2021-02-28 2021-02-28 13 1 10.20895/infotel.v13i1.541