scholarly journals Customizing WLAN Access Point’s Indoor Coverage and Throughput with Corner Reflector

2020 ◽  
Vol 19 (2) ◽  
pp. 12-15
Author(s):  
Omar Abdul Aziz ◽  
Jafri Din ◽  
Rozeha A. Rashid ◽  
Mohd. Adib Sarijari ◽  
Nur Aqilah Yusri
Keyword(s):  
Potential Application ◽  
Transmission Control Protocol ◽  
Wireless Systems ◽  
Access Point ◽  
Corner Reflector ◽  
Transmission Control ◽  
Internet Connectivity ◽  
Indoor Coverage ◽  
Indoor Wireless ◽  
Tcp Throughput

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.

Techniques for Throughput Enhancement in Wireless Networks

2016 ◽  
Vol 4 ◽  
pp. 1
Author(s):  
Abubakar Muhammad Miyim
Keyword(s):  
Wireless Networks ◽  
Transmission Control Protocol ◽  
Wireless Systems ◽  
Round Trip ◽  
Signal Degradation ◽  
Throughput Enhancement ◽  
Throughput Gain ◽  
Simulated Network ◽  
Retransmission Timeout ◽  
Tcp Throughput

In wireless systems, unnecessary signal degradation are caused by spurious timeouts from highly variable round-trip times (RTTs) for transmission control protocol (TCP). This paper proposes two methods of improving TCP throughput in wireless networks. Selecting a threshold higher than standard for retransmission timeout (RTO) and use of select-N-repeat (SNR) and trace-N-retransmit (TNR) as retransmission policies upon packet timeout are the two techniques adopted in this study. Simulations reveals that the former method helps reduce timeouts and provides relative throughput gain in a simulated network environment. However in the later method, TNR was found to improve throughput gain by about 8% over the SNR policy when packets at the receiver end arrive out-of-order.

scholarly journals CoAP-Based Streaming Control for IoT Applications

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1320
Author(s):  
Joong-Hwa Jung ◽  
Moneeb Gohar ◽  
Seok-Joo Koh
Keyword(s):  
Flow Control ◽  
Transmission Control Protocol ◽  
Buffer Size ◽  
Lossy Networks ◽  
Transmission Control ◽  
Error Handling ◽  
Streaming Applications ◽  
Throughput Enhancement ◽  
Iot Applications ◽  
Data Message

The Constrained Application Protocol (CoAP) is a representative messaging protocol for Internet of Things (IoT) applications. It is noted that a lot of IoT-based streaming applications have been recently deployed. Typically, CoAP uses User Datagram Protocol (UDP) as its underlying protocol for lightweight messaging. However, it cannot provide reliability, since it is based on UDP. Thus, the CoAP over Transmission Control Protocol (TCP) was recently proposed so as to provide reliability. However, the existing schemes do not provide the error handling and flow controls suitably for IoT-based streaming applications. This tends to induce throughput degradation in wireless lossy networks. In this paper, we propose a CoAP-based streaming control (CoAP-SC) scheme, which is an extension of CoAP over UDP with error handling and flow control for throughput enhancement. The proposed CoAP-SC scheme is designed by considering the sequence number of data message, the use of ACK messages, and the buffer size of sending buffer. To do this, a new CoAP option is defined. For performance analysis, the proposed scheme is implemented and compared with the existing schemes. From the testbed experimentations in various network environments, we see that the proposed CoAP-SC scheme can provide better throughput than the existing CoAP-based schemes by performing the error handling and flow control operations effectively.

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