An Ingenious Method For Organizing Dense Wi Fi Networks
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An Ingenious Method for Organizing Dense Wi-Fi Networks
Author: Jafruddin Khan Baliyana
language: en
Publisher: Classichouse
Release Date: 2024-03-29
WLAN got tremendous growth over recent years. Wireless LANs to support huge number of real time applications such as video steaming, video conferencing, email, media downloading, web browsing and file sharing. As these applications are easily access from anywhere and anytime, low-cost, ease of deployment and very high speed as compared to cellular network there very high demand for these applications. The number of users for these network applications continuously increased day by day and hence results congestion. Congestion is the traffic jam which takes place when data traffic or load over a network exceeds the capacity of network. In that situation the routers are unable to smooth out traffic and to cope up the data. The network performance becomes very poor or collapse completely and almost no packets delivered. Congestion control for on demand data as well as media traffic over network is challenge for researchers and motivate them to develop congestion control mechanism and techniques. Congestion control mechanism is applied to accomplish a high bandwidth utilization, to congregate to fairness quickly and efficiently, to reduce amplitude of oscillations and to sustain a high responsiveness. The important concern in Wireless Local area network is allocation of resources because all wireless nodes battle for same channel of radio. When uplink and downlink transmission congestion protocol (TCP) flows exist together in WLAN, then the service of network is biased towards uplink and it makes downlink TCP flows suffers. In this manner, at the MAC layer, decency among stations in the WLAN is guaranteed. Though, traffic downstream is uniquely transmitted from a passage while traffic upstream is produced from various customer stations. Along these lines, traffic upstream acquires more chances of access to remote (wireless) channel than the traffic downstream. This implies the equality among stations acknowledged at MAC layer doesn't mean the decency among the upper layer's flows. Indeed, unfairness among the upper layer flows has been accounted for. Besides, it has been brought up that TCP streams or flows experience extreme unfairness in case of WLANs. TCP is used as a protocol i.e. transport-layer protocol, the injustice among the flows at the upstream brought about by its congestion control devices. TCP initiates the mechanism of congestion control against data-based packet losses, yet not against ACK based packet losses Per-stream unfairness amongst TCP streams in IEEE 802.11 remote LAN condition has been accounted for in past writing. The past research proposed different answers for reducing the congestion and unfairness control. These arrangements lessen throughput of TCP unfairness mostly by queue management or by modification of MAC convention at passages or access point dependent on nitty-gritty data in wireless remote LAN, for example, the quantity of synchronized stations, flow rates and flow types. Notwithstanding, MAC conventions of remote passages are commonly executed in equipment, so it takes enormous expense to transform them. TCP is intended to perform well in customary wired systems with the uncertainties that packet-based losses are mostly because the system bit error rate (BER) and network congestion is insignificant. In any case, systems with remote connections experience the ill effects of noteworthy packet losses because of random handoffs and bit errors. Consequently, TCP accomplishes inadequately in systems with remote connections since it treats any packet losses in the system to be a consequence of network congestion and hinders its rate of transmission, or causes the sender of TCP to encounter superfluous breaks or timeouts, further decreasing its overall performance. In this theory, we focus on two fundamental methodologies for empowering the mechanism of congestion control to decide the reason for loss of packet.
Wireless Networking Technology
As the demand for higher bandwidth has lead to the development of increasingly complex wireless technologies, an understanding of both wireless networking technologies and radio frequency (RF) principles is essential for implementing high performance and cost effective wireless networks.Wireless Networking Technology clearly explains the latest wireless technologies, covering all scales of wireless networking from personal (PAN) through local area (LAN) to metropolitan (MAN). Building on a comprehensive review of the underlying technologies, this practical guide contains 'how to' implementation information, including a case study that looks at the specific requirements for a voice over wireless LAN application. This invaluable resource will give engineers and managers all the necessary knowledge to design, implement and operate high performance wireless networks.· Explore in detail wireless networking technologies and understand the concepts behind RF propagation.· Gain the knowledge and skills required to install, use and troubleshoot wireless networks.· Learn how to address the problems involved in implementing a wireless network, including the impact of signal propagation on operating range, equipment inter-operability problems and many more.· Maximise the efficiency and security of your wireless network.
802.11ac
The next frontier for wireless LANs is 802.11ac, a standard that increases throughput beyond one gigabit per second. This concise guide provides in-depth information to help you plan for 802.11ac, with technical details on design, network operations, deployment, and monitoring. Author Matthew Gast--an industry expert who led the development of 802.11-2012 and security task groups at the Wi-Fi Alliance--explains how 802.11ac will not only increase the speed of your network, but its capacity as well. Whether you need to serve more clients with your current level of throughput, or serve your existing client load with higher throughput, 802.11ac is the solution. This book gets you started. Understand how the 802.11ac protocol works to improve the speed and capacity of a wireless LAN Explore how beamforming increases speed capacity by improving link margin, and lays the foundation for multi-user MIMO Learn how multi-user MIMO increases capacity by enabling an AP to send data to multiple clients simultaneously Plan when and how to upgrade your network to 802.11ac by evaluating client devices, applications, and network connections