Wireless Technologies
Introduction
As wireless technology has begun to mature, the demand for wireless products has increased as new applications for the technology are realized. One application for wireless technology at the U.S. Naval Academy is to use the wireless capability to enhance classroom instruction. Currently the Electrical Engineering and Physics Departments have wireless access points and wireless laptops/desktops available for classroom instruction. The purpose of this report is to provide the technical research necessary to aid decision makers in determining which wireless technologies the Naval Academy should invest.
Background
In a wireless network, computers communicate with the network through a radio
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Each access point can practically service between 32 to 64 users, depending upon manufacturer. The bandwidth will be shared by all users. The number of radio channels associated with each technology will vary by technology and product manufacturer. Multiple channels allows for multiple access points to be collocated in order to provide access for a larger number of users.
Current USNA Uses
The Electrical Engineering Department currently uses the Dell suite with a wireless access point and 24 wireless laptops. They use the wireless network for “in class” projects where the use of either simulation (OPNET) or design software (PSPICE) is being taught and used.
The Physics department is using a LinkSys 802.11b wireless access point and LinkSys wireless NIC cards with desktop computers. Their primary use is for internet access.
Recommendation
The best technology system for the Naval Academy would be the 802.11a standard. It has 54 Mbps throughput capability as well as adequate range, sufficient for classroom use. Since the 54 Mbps is shared amongst all users, it would allow, at a minimum, 2 Mbps for each user in a class of 20 midshipmen operating simultaneously. It also has higher data rates at comparable distances
It was designed to replace 802.11a, 802.11b and 802.11g. It has the fastest transfer rate of (600Mbps) and the longest signal range compared to its predecessors. It operates in both 2.4GHz and 5GHz range.
Thus the speed and reliability can be improve by judging the number of antennas. In the aspect of data rate, Option 1 has the highest transfer rate comparing to routers that has single-band capabilities. This indicates that Option 1 is able to perform better by transferring 600Mb data per second, 150 Mb more than other routers. Option 1 is strongly recommended as it is more affordable in prices with comparably better performance. Furthermore, Option 1 is equipped with various wireless LAN standard that provides faster and reliable wireless signals. It uses either 2.4GHz (single band) or 5GHz (dual band) band of frequencies in which wireless communications operate. Demands of dual band arise when there are intensive work within a LAN network and provides better internal network performance due to less interference (Lynn,
Wireless network infrastructure has become just another connection method for corporate and home users alike. This rapid acceptance can be attributed from:
The devices that need to connect are workstations, wireless access points, security cameras, servers, phones and printers, with enough available bandwidth between buildings and devices. The wireless network itself will be able to handle multiple devices and there needs to be enough coverage throughout the campus, including the outdoors. Separate wireless network will need to be establish to ensure that guest traffic does not affect church network traffic.
Leonard Cooper Charter School is a K-12 school with approximately 1,000 students. The school wants to develop a local area network that meets the needs of the school now and is scalable for the future. There have been numerous complaints about the speed and reliability of the network, especially since a new addition to the building was added a few years back.
In week’s three individual dissection of Patton-Fuller Community Hospital Networking Department, I will discuss three topics that will help with a better understanding of the Hospital’s Networking Department. During the first topic, a complete analysis will be completed on the network systems in use. While covering the second topic, discussion on what standards may be missing from the Hospital’s current network. During last topic, I will identify the Hospital’s wireless technology in currently in use and how it may enhance the hospitals network.
This is a direct extension of the 802.11b that extends the maximum data rate to 54Mbps, making it possible to serve up to five times as many users. Our Wi-Fi network is based on the IEEE 802.11 b/g standards, which is the most commonly used standard. We have added Wi-Fi access points in our network to give easier access to corporate data and services. Most of the devices in this network, for example the personal computers, smartphones, digital cameras, tablets and digital audio players connected using the Wi-Fi technology. The hotspot will be in the range of 20 meters (66 feet) indoors and a greater range outside.
Today’s current standard of 802.11 is 802.11ac. When comparing newer routers for home use, you will run across routers labeled AC1200, AC1750, AC3200, and so on. The “AC” refers to the wireless standard, while the number following it refers to the speed. The current range of 802.11ac routers can provide speeds up to 1300Mbps on the 5 GHz band, and up to 450 Mbps on 2.4 GHz band. The base level for 802.11ac is more than twice the speed offered from the previous standard, 802.11n. Most routers available in stores today offer 802.11n or 802.11ac, older standards such the “a,” “b,” and, “g” are out of
4. Use the Internet to research one to two applications of the identified wireless technology. List each application found. Reference the websites you used to locate this information.
Outline a wireless network and technology that you use regularly. The WLANs which are derived from the IEEE 802.11 standards, and marketed under the Wi-Fi trademark name. The WLANs security is neither forthright/candid nor simple, and it is continuously varying. Even though, as WLAN increase client output, they also expose the networks to a new group of potential hackers. With the present inherent security weakness of the 802.11 standard, all companies, small, medium or large, need to find out their security conditions derived from the applications using the WLAN. The standards also provide requirements for high-speed networks that support most modern-day applications. What sorts of security issues do
Each site slated for secure indoor wireless had a site survey done. The site survey method was top-down with the roof as the starting point. As with most site surveys the locations for equipment was identified and the cabling pathways were determined. In addition, a wireless survey was performed to identify possible sources of interference and find best install sites for AP’s. This was performed using wireless analysis tools to get the best installation places.
If you were implementing a low-cost wireless network that had to cover a very large area and support only a few users, the use of 802.11g technology would be a very good option. 11g technology operates at the 2.4Ghz range which allows for access points to provide signals up to 300 feet. The 2.4GHz signal also has lower rates of signal loss from obstructions. This means that a fewer number of AP's would need to be purchased for complete are coverage. Also, by providing throughput of up 54Mbps it could easily support bandwidth needs of multiple users who require minimal bandwidth. This would be the case of a warehouse or large department store where the applications would not place major demands on network resources.
It’s very important to determine the device and application requirements based on bandwidth, protocols and frequency. In wireless network, bandwidth, protocols and sometime environmental conditions affect the speed of the channel so we need to calculate the aggregate throughputs before designing the network. Today, users carry Wi-Fi devices such as notebooks, laptops, tablets and Smartphone’s so total throughput must be calculated by estimating number of connections rather than the number of the seats. Some common wireless networking standards such as 802.11a/b/g/n invented in the IEEE association must be supported by wireless network. For better performance and for faster devices (802.11n devices), dual-ratio access points should be deployed. Table1 [3] illustrate the different IEEE standards and throughput.
Wireless networking hardware requires the use of underlying technology that deals with radio frequencies as well as data transmission. The most widely used standard is 802.11 produced by the Institute of Electrical and Electronic Engineers (IEEE). This is a standard defining all aspects of Radio Frequency Wireless networking
To ensure maximum flexibility and reliability I recommend that the network be configured as a wireless only network. The number of devices is relatively small; two workstations, one printer and one router