tcp throughput
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2021 ◽  
Vol 21 (11) ◽  
pp. 279
Author(s):  
Jie Wang ◽  
Hai-Long Zhang ◽  
Na Wang ◽  
Xin-Chen Ye ◽  
Wan-Qiong Wang ◽  
...  

Abstract Data Center of Xinjiang Astronomical Observatory (XAO-DC) commenced operating in 2015, and provides services including archiving, releasing and retrieving precious astronomical data collected by the Nanshan 26m Radio Telescope (NSRT) over the years, and realises the open sharing of astronomical observation data. The observation data from NSRT are transmitted to XAO-DC 100 km away through dedicated fiber for long-term storage. With the continuous increase of data, the static architecture of the current network cannot meet NSRT data-transmission requirements due to limited network bandwidth. To get high-speed data-transmission using the existing static network architecture, a method for reconstruction data-transmission network using Software-Defined Networks (SDN) is proposed. Benefit from the SDNʼs data and control plane separation, and open programmable, combined with the Mininet simulation platform for experiments, the TCP throughput (of single thread) was improved by ∼24.7%, the TCP throughput (of multi threads) was improved by ∼9.8%, ∼40.9%, ∼35.5% and ∼11.7%. Compared with the current network architecture, the Latency was reduced by ∼63.2%.


Author(s):  
Aizaz U. Chaudhry

AbstractIs it possible to find hidden relationships among variables in WiFi network using machine learning (ML)? Can we use ML to find a variable that significantly affects the TCP throughput in WiFi? In this work, we employ a publicly available WiFi dataset to investigate these questions. We use ML techniques, including principal component analysis (PCA), linear regression (LR), and random forest (RF), to study the effect of link speed, received signal strength, round-trip time (RTT), and number of available access points on TCP throughput in WiFi. More specifically, we are interested in employing ML to find the variable that most accurately predicts and thereby most significantly affects the throughput. Simple correlation analysis indicates that a combination of multiple variables is more likely to act as a reasonable predictor of the throughput, whereas a single variable, such as RTT, alone is not likely to predict the throughput with reasonable accuracy. From PCA, the first principal component (PC1) is seen as highly correlated to RTT. During predictive analysis, it is observed that the LR model is unable to find any hidden relationship between throughput and other variables. However, the RF model discovers that RTT explains the variation in throughput more closely and as such it predicts the throughput more accurately compared to other variables. PC1 captures nearly all of the variation in throughput with the RF model and predicts throughput with very high accuracy, which indirectly confirms RTT as the variable that most significantly affects the TCP throughput in WiFi. Consequently, we discover a very close relationship between RTT and TCP throughput using appropriate ML techniques, and these results can be helpful in developing a better understanding of the relationship between latency and throughput for designing future low-latency networks.


2021 ◽  
pp. e00855
Author(s):  
Olatilewa ABOLADE ◽  
Alexander OKANDEJI ◽  
Alice OKE ◽  
Martins OSIFEKO ◽  
Olufunmi SANUSI ◽  
...  

Author(s):  
Yan Peng ◽  
Yiqing Zhou ◽  
Ling Liu ◽  
Jintao Li ◽  
Zhengang Pan ◽  
...  

2020 ◽  
Vol 19 (2) ◽  
pp. 12-15
Author(s):  
Omar Abdul Aziz ◽  
Jafri Din ◽  
Rozeha A. Rashid ◽  
Mohd. Adib Sarijari ◽  
Nur Aqilah Yusri

Careful control of indoor wireless coverage is crucial to ensure better signal reception at user-end, mitigate interference to other adjacent wireless systems plus reduce possibility of signal reception by unintended users. Existing solutions are either costly or difficult to configure. This paper presents empirical IEEE802.11 indoor coverage and Transmission Control Protocol (TCP) throughput analysis for WLAN Access Point with corner reflector. The integration of two corner reflector configurations to Access Point was shown to successfully weaken signals by up to 19 dB and 100% of TCP throughput while strengthening signals by up to 6 dB and 40% of TCP throughput for respective intended regions. The results demonstrate potential application of corner reflector to customize indoor coverage and regulate reliable internet connectivity of Access Point.


Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3880
Author(s):  
Dmitri Moltchanov ◽  
Aleksandr Ometov ◽  
Pavel Kustarev ◽  
Oleg Evsutin ◽  
Jiri Hosek ◽  
...  

Dynamic blockage of radio propagation paths between the user equipment (UE) and the 5G New Radio (NR) Base Station (BS) induces abrupt rate fluctuations that may lead to sub-optimal performance of the Transmission Control Protocol (TCP) protocol. In this work, we characterize the effects of dynamic human blockage on TCP throughput at the 5G NR air interface. To this aim, we develop an analytical model that expresses the TCP throughput as a function of the round-trip time (RTT), environmental, and radio system parameters. Our results indicate that the blockage affects TCP throughput only when the RTT is comparable to the blocked and non-blocked state durations when the frequency of state changes is high. However, such conditions are not typical for dynamic body blockage environments allowing TCP to benefit from the high bandwidth of 5G NR systems fully.


2020 ◽  
Author(s):  
José A. R. Pacheco de Carvalho ◽  
Cláudia F. F. P. Ribeiro Pacheco ◽  
Antonio D. Reis . ◽  
Hugo Veiga

The increasing importance of wireless communications, involving electronic devices, has been widely recognized. Performance is a fundamental issue, resulting in more reliable and efficient communications. Security is also crucially important. Laboratory measurements are presented about several performance aspects of Wi-Fi IEEE 802.11ac WPA2 point-to-point links. Our study contributes to performance evaluation of this technology under WPA2 encryption, using available equipment (Cisco 2702i access points and TP-Link AC1900 USB 3.0 adapters). New results are given from TCP and UDP experiments concerning TCP throughput versus TCP packet length, jitter and percentage datagram loss versus UDP datagram size. Comparisons are made to corresponding results for WPA2 802.11n. Conclusions are drawn about the comparative performance of the links. Keywords: Wi-Fi, WLAN, IEEE 802.11ac, Wireless network laboratory performance, Point-to-Point WPA2 links


2020 ◽  
Author(s):  
José A. R. Pacheco de Carvalho ◽  
Cláudia F. F. P. Ribeiro Pacheco ◽  
Antonio D. Reis . ◽  
Hugo Veiga

The increasing importance of wireless communications, involving electronic devices, has been widely recognized. Performance is a fundamental issue, resulting in more reliable and efficient communications. Security is also crucially important. Laboratory measurements are presented for several performance aspects of Wi-Fi IEEE 802.11a54 Mbps WPA2 point-to-point and four node point-to-multipoint links. Our study contributes to performance evaluation of this technology under WPA2 encryption, using available equipment (HP V-M200 access points and Linksys WPC600N adapters). New results are given from TCP and UDP experiments concerning TCP throughput versus TCP packet length, jitter and percentage datagram loss versus UDP datagram size. Comparisons are made to corresponding results for Open links. Conclusions are drawn about the comparative performance of the links. Keywords: Wi-Fi, WLAN, IEEE 802.11a, Wireless network laboratory performance, Multi-Node WPA2 links


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