Fast channel switching technique for interference avoidance with 5 GHz dual channel wireless LAN

2016 ◽  
Author(s):  
Takashi Takeuchi ◽  
Yuki Nishikawa ◽  
Ryosuke Fujiwara
Keyword(s):  
Wireless Lan ◽  
Interference Avoidance ◽  
Channel Switching ◽  
Dual Channel ◽  
5 Ghz

scholarly journals Implementation and Evaluation of WLAN 802.11ac for Residential Networks in NS-3

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Andy Bubune Amewuda ◽  
Ferdinand Apietu Katsriku ◽  
Jamal-Deen Abdulai
Keyword(s):  
Wireless Lan ◽  
Multiple Input Multiple Output ◽  
Access Point ◽  
Operating Conditions ◽  
Network Simulator ◽  
High Data ◽  
Delay Jitter ◽  
Combined Features ◽  
5 Ghz ◽  
Very High

Wi-Fi has been an amazingly successful technology. Its success may be attributed to the fact that, despite the significant advances made in technology over the last decade, it has remained backward compatible. 802.11ac is the latest version of the wireless LAN (WLAN) standard that is currently being adopted, and it promises to deliver very high throughput (VHT), operating at the 5 GHz band. In this paper, we report on an implementation of 802.11ac wireless LAN for residential scenario based on the 802.11ax task group scenario document. We evaluate the 802.11ac protocol performance under different operating conditions. Key features such as modulation coding set (MCS), frame aggregation, and multiple-input multiple-output (MIMO) were investigated. We also evaluate the average throughput, delay, jitter, optimum range for goodput, and effect of station (STA) density per access point (AP) in a network. ns-3, an open source network simulator with features supporting 802.11ac, was used to perform the simulation. Results obtained indicate that very high data rates are achievable. The highest data rate, the best mean delay, and mean jitter are possible under combined features of 802.11ac (MIMO and A-MPDU).

A 5-GHz CMOS transceiver for IEEE 802.11a wireless LAN systems

2002 ◽  
Vol 37 (12) ◽  
pp. 1688-1694 ◽  
Author(s):  
M. Zargari ◽  
D.K. Su ◽  
C.P. Yue ◽  
S. Rabii ◽  
D. Weber ◽  
...  
Keyword(s):  
Wireless Lan ◽  
Ieee 802.11A ◽  
5 Ghz

scholarly journals IEEE 802.11ah: A Long Range 802.11 WLAN at Sub 1 GHz

2013 ◽  
pp. 83-108
Author(s):  
Weiping Sun ◽  
Munhwan Choi ◽  
Sunghyun Choi
Keyword(s):  
Wireless Lan ◽  
Large Scale ◽  
Transmission Range ◽  
Mac Layer ◽  
Medium Access ◽  
Frequency Spectra ◽  
Ieee 802.11Ah ◽  
Phy Layer ◽  
5 Ghz ◽  
Access Mechanisms

IEEE 802.11ah is an emerging Wireless LAN (WLAN) standard that defines a WLAN system operating at sub 1 GHz license-exempt bands. Thanks to the favorable propagation characteristics of the low frequency spectra, 802.11ah can provide much improved transmission range compared with the conventional 802.11 WLANs operating at 2.4 GHz and 5 GHz bands. 802.11ah can be used for various purposes including large scale sensor networks, extended range hotspot, and outdoor Wi-Fi for cellular traffic offloading, whereas the available bandwidth is relatively narrow. In this paper, we give a technical overview of 802.11ah Physical (PHY) layer and Medium Access Control (MAC) layer. For the 802.11ah PHY, which is designed based on the down-clocked operation of IEEE 802.11ac’s PHY layer, we describe its channelization and transmission modes. Besides, 802.11ah MAC layer has adopted some enhancements to fulfill the expected system requirements. These enhancements include the improvement of power saving features, support of large number of stations, efficient medium access mechanisms and throughput enhancements by greater compactness of various frame formats. Through the numerical analysis, we evaluate the transmission range for indoor and outdoor environments and the theoretical throughput with newly defined channel access mechanisms.

scholarly journals Wireless Network Enhancement in the Arctic by Selection of Dielectric Materials of Rooms

2020 ◽  
Vol 9 (3) ◽  
pp. 524-530
Keyword(s):  
Dielectric Constant ◽  
Wireless Lan ◽  
Data Transfer ◽  
Short Circuit ◽  
Dielectric Materials ◽  
The Arctic ◽  
Telecommunication Infrastructure ◽  
5 Ghz ◽  
Mimo Technology ◽  
Multilayer Materials

The Arctic is of fundamental military-strategic importance for Russia. The development of the Arctic without an advanced telecommunication infrastructure is very difficult. To supply working in the Arctic employees with universal means of communication, it is the most efficient to use wireless communication band between 2.4 GHz and 5 GHz. Facilities, where radio telecommunication equipment in the Arctic works, have walls consisting of a multilayer structure. There is the problem of organizing communication of good quality. In such rooms, the best method is to use wireless networks using MIMO technology. We have developed a theory that allows us to determine the time Interflection T based on the determination of the dielectric constant of multilayer materials. In this case, problems arise in determining this coefficient. We propose to use the well-known method of short circuit and idling. We conducted a large number of measurements to determine the dielectric constant of various materials. We used this value to calculate the time T. In the future, we made adjustments to the premises by changing the size and amount of multilayer materials. Experimental results in the range from 2.4 GHz to 5 GHz showed that the data transfer rate increased by 5-10% when we performed the calculation of time Interflection and processed the room with multilayer materials. The proposed method is applicable indoors to build a wireless LAN standard IEEE 802.11 n.

A 0.7V Transformer-Feedback CMOS Low-noise Amplifier for 5-GHz Wireless LAN

PIERS Online ◽  
2007 ◽  
Vol 3 (7) ◽  
pp. 968-970
Author(s):  
Hui I Wu ◽  
R. S. Fan ◽  
C. F. Jou
Keyword(s):  
Wireless Lan ◽  
Low Noise ◽  
Low Noise Amplifier ◽  
Noise Amplifier ◽  
Transformer Feedback ◽  
5 Ghz
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