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How to Choose the Best Wireless Router for Your Need?

Tuesday, November 9th, 2010

Wireless router is the main wireless devices needed, besides the modem, to build a wireless network environment in home or in SOHO. Generally when you sign-up for a broadband internet connection from the ISP, the ISP provides you a modem which is connected direct to one single computer in home either using USB port or NIC adapter. So if you want to build a wireless network, you need to buy a wireless router or access point. How do you know which one is the best wireless router you need?

The term the best wireless router is relative; there are some factors you need to consider in deciding which router is the best for your need. If you have limited budget, you really need to consider the basic requirements which are the best for your need. For example, if you just want to share the broadband internet connection with couple of computers, and other share documents and printer within the household, then you don’t need to buy a high features wireless router such as one which is designed specifically for gamers in mind.

There are many types of Wireless Routers at the marketplace you can purchase, but which one is the best? In selecting the wireless router; some people make the mistake of trying to find the best wireless router. Of course, that’s a moving target as router get better and better with each new model introduction, but what you really need is “The perfect wireless router that is best for your need”. So your target is not the “best wireless router” but “the router that is best for your need”.

Best Wireless router for Internet sharing

Based on the principle of the perfect wireless router that is best for your need, if you just want to build a wireless environment in home to share the internet connection, or just for the portability reason so you can browse the internet with your laptop everywhere within the house wirelessly, you just need an all-in-one device which combines the function of modem, router, and the wireless access point.

If you subscribe for ADSL internet from the ISP which includes the monthly charges for the modem, you can purchase all-in-one device which includes the ADSL modem with the price under $100 such as D-Link DSL-2640B, or you can consider Netgear DG834Gv5 – a DSL Wireless Modem with Wireless -G Router and built-in DSL Modem. Both are wireless router with built-in ADSL modem, including 4-port Switch LAN, wireless access point, and with router/firewall feature for security protection against the internet threats.

Both routers would be suitable for your home wireless environment to share the internet, share the files and printer with several computers in the household. All the requirements you need for building a wireless environment in home with this type of modem-router, a single device for all. This type of all-in-one device would be the perfect wireless router for your need. For Cable Internet, you can consider SBG-900 Cable modem router by Motorola.

Wireless Router for Gaming and HD Streaming

The best wireless router for gaming and HD media streaming are demanded high performance, fast, and reliable networks. Both Gaming and streaming HD video applications demand high-speed networks that capable of delivering high bandwidth-sensitive applications. They should be capable to intelligently manage and automatically prioritize network traffic to better execute bandwidth-sensitive applications including VoIP and multimedia applications. You need a wireless router which has QoS (Quality of Service) technology feature.

The fastest wireless network today is based on 802.11n standards. The final version of draft 802.11n standards. The Wi-Fi Alliance said that the final version of the 802.11n Wi-Fi standard should effectively remain the same as it is in the Draft 2.0 spec. The Wi-Fi Alliance is a trade group that owns the trademark Wi-Fi and owns and controls the Wi-Fi CERTIFIED logo, a registered trademark, which is permitted only on equipment which has passed testing. This 802.11n (wireless –N) technology can deliver the speed of up to 300 Mbps (ideal condition, actual speed may vary) with enhanced technology specific to the manufacturers. They should also feature enhanced wireless technology for optimal range and connectivity such as MIMO technology. MIMO is a technology which uses multiple antennas to coherently resolve more information than possible using a single antenna.

The best wireless router for gaming and streaming HD media should be clear from the source of interference. Common source of radio interference is wireless devices which operate in the 2.4 GHz radio band such as cordless phone, baby monitor, microwave oven, home security and monitoring appliances, garage controller, and so on. Wireless 802.11b/g and wireless 802.11n standards operate in 2.4 GHz radio band too. For a clear radio band, the wireless router should include the dual-band feature which can operate both in 2.4 GHz and 5 GHz (802.11a) radio bands either selectable or simultaneous. With dual-band, you can stream HD media as well as for gaming in a clear 5 GHz frequency band, less radio interference as in 2.4 GHz band. This will assure a jitter-free and lag-free wireless environment.

Example of the perfect but not the best wireless router for gaming and HD streaming is D-Link DGL-4500 wireless router. DGL-4500 is specifically designed for gamers in mind. It is powered by award winning GameFuel technology which allows you to customize your network settings to prioritize game traffic so others will not hog all the bandwidth while downloading HD media.
By Ki Grinsing

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DSL Wireless Modem ? An All-In-One Device to Build a Wireless Network in Home

Saturday, October 30th, 2010

Building a wireless network in home or SOHO (Small Office Home Office) is not a very difficult task to do today, even though by someone without computer networking experience. With DSL wireless modem, you can build a wireless network in home easily and securely.

For mostly people without any computer network knowledge, building the wireless network in home is even something that they never imagine before. However, if they know all the requirements to build a wireless network can be replaced by a single all-in-one DSL wireless modem, technical complexities of computer networking, connection, and configuration can be minimized as small as possible.

One of the apparent reasons to build a wireless network in home today is to share the broadband internet connection with many computers in the household. Besides, with the wireless network in home you can browse the internet with your laptop at the pool side, with your Wi-Fi phone or Skype phone – you can make some internet calls anywhere within the house without the need of turning-on the computer, or you can go live game with your XBOX console in the comfort of your living room without the clutter of the wires. All the requirements you need to build a simple wireless network in home or SOHO is a single all-in-one DSL wireless modem. What are actually the requirements to build a wireless network in home?

Firstly, you need a DSL modem. A modem is a digital to analog signal converter and vice versa, and is an interface device between the subscriber premises and the local Telco or the ISP. Generally when you signup for a broadband internet services, the ISP provides you a modem which is connected directly to a single computer using a USB connection or Ethernet connection. A DSL wireless modem includes a built-in DSL modem – the first requirements you need.

Secondly, you need a router or firewall. A router or firewall protects your private internal network from public networks (the internet) against any types of the threats. Typically home routers are powered by the dual-firewall feature – NAT and SPI. Network address translation (NAT) helps you hide the private network from the public network, while the stateful packets inspection (SPI) inspects the incoming packets precisely and thoroughly against any false positive packets. A DSL wireless modem includes the function of dual-firewall – the second requirements you need.

Thirdly, you need a wireless access point. All wireless devices communicate with the wireless network infrastructure using the wireless access point. Access point bridges network devices in the wireless network with the network devices in the wired network. Wireless access points extend your network wirelessly within the wireless coverage. A DSL wireless modem includes the function of the wireless access point – the third requirements you need.

Lastly, you need a LAN Switch that will interface the wireless access point to the wired network. Typically the DSL wireless modem includes a 4-port LAN Switch. With these Ethernet ports, you can also connect the computers directly using the UTP LAN cable; and connect the Ethernet print server to share the printer on the network. The recent products shipped with the 10/100/1,000 Mbps Gigabit port – with auto-sensing Ethernet port. With auto-sensing LAN port, you don’t need to worry about the cable type used, either cross UTP cable or straight-through cable – the system will detect the cable type used and adjust the system automatically.

Typical DSL wireless modem includes the above four functions, a DSL modem, a router / firewall, a wireless access point, and a Switch LAN. By purchasing this single all-in-one device – the DSL wireless modem; you can build a simple wireless network in home or SOHO easily and securely. You do not need to buy separate devices to reduce the complexity of the connection, the configuration, and the setting of the wireless network.

Network Setup and Connection

Since DSL wireless modem is a single device – a single solution in building the wireless network, the connection and configuration is simple. By default, with a single connection to the DSL line – the wireless network will be functional. Off course, with the default setting – no security encryption is applied to the wireless connection. Security feature is not enabled by default.

Connect the Internet port (or the WAN port) of the DSL wireless modem to the phone line (the DSL line). Unlike dial-up connection, DSL internet uses the same line as the phone line without interfering each other; both Internet and voice can work together at the same time. Traditional internet using dial-up modem uses the phone line for Internet connection, but at the same time you cannot use the line for the voice (phone calls) until the internet connection is released. With this single connection, your DSL wireless modem is ready to provide wireless roaming within the house and all the computers (with the Wi-Fi enabled) can connect to the network with a simple configuration and even with a simple plug and play.

Each computer on the network needs an IP address to be able to communicate via the network, so how can you provide and configure the IP address? DSL wireless modem includes a DHCP service which is enabled by default. DHCP server provides and leases the IP address configuration to the computers on the network automatically.

There are many DSL wireless modems available at the market today ranging from devices with 802.11g standards and the latest standard is the draft 2.0 802.11n. Draft 802.11n is the future wireless technology which is not ratified yet, but mostly all the wireless manufacturers have shipped their products using 802.11n standards.
By Ki Grinsing

Ki Grinsing was graduated from a university with the additions of MCSE and CCNA certifications. He has long years of working experiences in IT. For a complete article please visit DSL Wireless modem and Wireless adapter for XBOX .

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How to Build a High Performance and Secured Wireless Network?

Wednesday, October 20th, 2010

If you would like to build a wireless network from the scratch, it is recommended to use the best wireless network based devices, using the current wireless technologies available at the marketplace today. The best wireless network should consist of wireless devices and wireless standards which can provide the best technologies in three main areas. Firstly, the wireless devices and standards should provide the fastest wireless network. Secondly, wireless devices and technology used should provide the farthest network coverage. Thirdly, the wireless security standard should provide the most secured network to protect the private network against any types of network threats. The Best Wireless Network in Speed The fastest and the best wireless network available at the market today is 2.0 802.11n standards. This is the latest industrial standards today – the future technology, it was just ratified by the IEEE last Sep 2009. Mostly all the wireless manufacturers ship their lines of wireless products based on this draft and final standards. The recent manufacturers ship their products and claimed that the wireless network can provide the speed up to 300 Mbps. However, this is all theoretical, in a sense, due to the fact that routers never achieve the maximum throughput they’re rated at (802.11b at 11 Mbps and 802.11g at 54 Mbps). Many wireless devices were shipped based on the draft version of 802.11n standards. But this draft version is assured to be backward compatibility with the current industrial standards 802.11b and wireless 802.11g wireless devices, and can be used to fill in the gaps of your wireless network today. Besides, draft 802.11n has been ratified officially as the fastest wireless industrial standards, there will be no hardware changes. The only thing you need to upgrade is the firmware that will be freely downloaded from the official vendor’s websites. Even some vendors design their products with the capability of download the recent firmware automatically when it connects to the internet. Now, the final version of the 802.11n has been adopted by many new wireless devices today. The Best Wireless Network in Network Coverage Selecting the best wireless network should provide the technology with the farthest network coverage. A current technology widely adopted by the manufacturers to provide the farther wireless network coverage is the combination of wireless –N and Multiple-in-multiple-out (MIMO) antenna technology. MIMO uses multiple transmitter and receiver antennas to improve the system performance. MIMO technology relies on multipath signals. Multipath signals are the reflected signals arriving at the receiver some time after the line of sight (LOS) signal transmission has been received. MIMO technology combined with the wireless –N creates robust signals for maximum range and speed with reduced dead spots. Some manufacturers embedded their product with their own competitive technology for better network coverage. For example D-Link introduces Extreme –N technology to provide the speed up to 14x faster and provide 6x the range farther when compared to 802.11g wireless devices. The Best Wireless Network in Security Selecting the best wireless network, you should think about the best security the network can protect against any threats. As a general rule, you should employ a level of security that corresponds to the sensitivity of the data on your network. Unlike wired systems, which can be physically secured, wireless networks are not confined to the inside of buildings. They can be picked up as far as 1,000 feet outside of the premises with a laptop and a gain antenna. This makes WLANs inherently vulnerable to interception. The latest industrial wireless security standard is WPA2. WPA stands for Wi-Fi Protected Access which is a certification program created by the Wi-Fi Alliance to indicate compliance with the security protocol created by the Wi-Fi Alliance to secure wireless computer networks. This protocol was created in response to several serious weaknesses researchers had found in the previous system, Wired Equivalent Privacy (WEP). The other features you should consider in selecting the wireless devices for the best wireless network is the Quality of Services (QoS) feature which capable of providing the prioritization of the data stream. With wireless routers (without the QoS feature), all wired and wireless traffic, including VoIP, Video Streaming, Online Gaming, and Web browsing are mixed together into a single data stream. By handling data this way, applications like video streaming could pause or delay. With Intelligent QoS Technology, wired and wireless traffic is analyzed and separated into multiple data streams. These streams are then categorized by sensitivity to delay, so applications like VoIP, Video Streaming, and Online Gaming are given priority over Web browsing. This enables multiple applications to stream smoothly to your TV or PC. D-Link introduces Gamer Lounge DGL-4500 with intelligent QoS technology which is designed specifically for gamers in mind. The last but not the least for the best wireless network you can also consider the dual-band feature of the wireless access point and also the wireless clients. With the dual band technology, the wireless devices support 2.4GHz & 5GHz wireless signals at the same time. This allows you to check e-mail and browse the Internet using the 2.4GHz band while simultaneously streaming High-Definition (HD) movies and other media on the 5GHz band. With the best wireless network, it is not perfect if you do not deploy the antivirus software for each of the computers on the network. By Ki Grinsing

Ki Grinsing actively manages blogs which relates to computer networking. Graduated from a university with MCSE, CCNA certifications, he has long years of experiences in IT. Read more detail about the best wireless networking and DSL Wireless modem

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Proposed Planning of Wireless Power Transmission Demonstration

Sunday, October 10th, 2010

I. INTRODUCTION

In our present electricity generation system we waste more than half of its resources. Especially the transmission and distribution losses are the main concern of the present power technology. Much of this power is wasted during transmission from power plant generators to the consumer. The resistance of the wire used in the electrical grid distribution system causes a loss of 26-30% of the energy generated. This loss implies that our present system of electrical distribution is only 70-74% efficient. We have to think of alternate state – of – art technology to transmit and distribute the electricity. Now- a- days global scenario has been changed a lot and there are tremendous development in every field. If we don’t keep pace with the development of new power technology we have to face a decreasing trend in the development of power sector. The transmission of power without wires may be one noble alternative for electricity transmission.

William C. Brown, the leading authority on wireless power transmission technology, has loaned this demonstration unit to the Texas Space Grant Consortium to show how power can be transferred through free space by microwaves. A block diagram of the demonstration components is shown below. The primary components include a microwave source, a transmitting antenna, and a receiving rectenna.

Fig.1 Block of wireless power transmission

The microwave source consists of a microwave oven magnetron with electronics to control the output power. The output microwave power ranges from 50 W to 200 W at 2.45 GHz. A coaxial cable connects the output of the microwave source to a coax-to-waveguide adapter. This adapter is connected to a waveguide ferrite circulator which protects the microwave source from reflected power. The circulator is connected to a tuning waveguide section to match the waveguide impedance to the antenna input impedance.

The slotted waveguide antenna consists of 8 waveguide sections with 8 slots on each section. These 64 slots radiate the power uniformly through free space to the rectenna. The slotted waveguide antenna is ideal for power transmission because of its high aperture efficiency (> 95%) and high power handling capability.

A rectifying antenna called a rectenna receives the transmitted power and converts the microwave power to direct current (DC) power. This demonstration rectenna consists of 6 rows of dipoles antennas where 8 dipoles belong to each row. Each row is connected to a rectifying circuit which consists of low pass filters and a rectifier. The rectifier is a GaAs Schottky barrier diode that is impedance matched to the dipoles by a low pass filter. The 6 rectifying diodes are connected to light bulbs for indicating that the power is received. The light bulbs also dissipated the received power. This rectenna has a 25% collection and conversion efficiency, but rectennas have been tested with greater than 90% efficiency at 2.45 GHz.

II. THE TECHNOLOGIES AVAILABLE

In this remarkable discovery of the “True Wireless” and the principles upon which transmission and reception, even in the present day systems, are based, Dr. Nikola Tesla shows us that he is indeed the “Father of the Wireless.” The most wellknown and famous Wardenclyffe Tower (Tesla Tower) was designed and constructed mainly for wireless transmission of electrical power, rather than telegraphy [1]. The most popular concept known is Tesla Theory in which it was firmly believed that Wardenclyffe (Fig.2) would permit wireless transmission and reception across large distances with negligible losses [2]. In spite of this he had made numerous experiments of high quality to validate his claim of possibility of wireless transmission of electricity (Fig.3). But this was an unfortunate incidence that people of that century was not in a position to recognize his splendid work otherwise today we may transmit electricity wirelessly and will convert our mother earth a wonderful adobe full of electricity.

Fig.2. The 187-foot Wardenclyffe Tower (Tesla Tower)

The modern ideas are dominated by microwave power transmission (MPT, Figure 3) called Solar power satellite to be built in high earth orbit to collect sunlight and convert that energy into microwaves, then beamed to a very large antenna on earth, the microwaves would be converted into conventional electrical power.

Fig.3. The basis for Tesla’s system for the wireless transmission of electrical

power[3].

III. MERITS, DEMERITS & ECONOMICS OF

WIRELESS TECHNOLOGIES

3.1 Merits

An electrical distribution system, based on this method would eliminate the need for an inefficient, costly, and capital intensive grid of cables, towers, and substations. The system would reduce the cost of electrical energy used by the consumer and rid the landscape of wires, cables, and transmission towers.

There are areas of the world where the need for electrical power exists, yet there is no method for delivering power. Africa is in need of power to run pumps to tap into the vast resources of water under the Sahara Desert. Rural areas, such as those in China, require the electrical power necessary to bring them into the 20th century and to equal standing with western nations. The wireless transmission will solve many of these problems The electrical energy can be economically transmitted without wires to any terrestrial distance, so there will be no transmission and distribution loss. More efficient energy distribution systems and sources are needed by both developed and under developed nations. In regards to the new systems, the market for wireless power transmission is enormous. It has the potential to become a multi-billion dollar per year market.

The increasing demand for electrical energy in industrial nations is well documented. If we include the demand of third world nations, pushed by their increasing rate of growth, we could expect an even Faster rise in the demand for electrical power in the near future. These systems can only meet these requirements with 90–94 %efficient transmission [3, 8].

High Transmission Integrity and Low Loss: – To transmit

wireless power to any distance without limit. It makes no difference what the distance is. The efficiency of the transmission can be as high as 96 or 97 per cent, and there are

practically no losses.

 

3.2. Demerits

 

Biological Impact: – One common criticism of the Tesla wireless power system is regarding its possible biological effects. Calculating the circulating reactive power, it was found that the frequency is very small and such a frequency is very biologically compatible [3, 8].

 

3.3.Economic Impact

 

The concept looks to be costly initially. The investment cost of Tesla Tower was $150,000 (1905). In terms of economic theory, many countries will benefit from this service. Only private, dispersed receiving stations will be needed. Just like television and radio, a single resonant energy receiver is required, which may eventually be built into appliances, so no power cord will be necessary! Monthly electric utility bills from old-fashioned, fossil-fuelled, lossprone electrified wire-grid delivery services will be optional, much like “cable TV” of today. In the 21st century, “Direct TV” is the rage, which is an exact parallel of Tesla’s “Direct Electricity.”

IV. ADDITIONAL REMARKS

Many concepts, research papers, patents are available on wireless transmission of electricity but most research work were carried out in isolation, so it needs a joint collaborative efforts to get a very useful results on this advanced technology on power transmission for the benefit of mankind globally in future. Whatever the future may bring, the universal application of these great principles is fully assured, though it may be long in coming. With the opening of the first power plant, incredulity will give way to wonderment, and this to ingratitude, as ever before.

The world is still not able to achieve the benefit of the God gifted potential of Dr N.Tesla. People neglected him and his good work. He deserved much better treatment from the tycoons of his age, than to spend the last 40 years of his life in abject poverty. However, he was too much of a gentleman to hold a grudge. Instead, regarding the magnifying transmitter, Tesla wrote in his autobiography, “I am unwilling to accord to some small-minded and jealous individuals the satisfaction of having thwarted my efforts. These men are to me nothing more than microbes of a nasty disease. My project was retarded by laws of nature. The world was not prepared for it. It was too far ahead of time. But the same laws will prevail in the end and make it a triumphal success.” [3, 8-9]. If this has had not been happened, then today we will be in a wonder world of plenty of power using the technology of wireless transmission of electricity.

V. CONCLUSION

The transmission of power without wires is not a theory or a mere possibility, it is now a reality. The electrical energy can be economically transmitted without wires to any terrestrial distance. Many researchers have established in numerous observations, experiments and measurements, qualitative and quantitative. Dr.N.Tesla is the pioneer of this invention. Wireless transmission of electricity have tremendous merits like high transmission integrity and Low Loss (90 – 97 % efficient) and can be transmitted to any where in the globe and eliminate the need for an inefficient, costly, and capital intensive grid of cables, towers, and substations. The system would reduce the cost of electrical energy used by the consumer and get rid of the landscape of wires, cables, and transmission towers. It has negligible demerits like reactive power which was found insignificant and biologically compatible.

REFERENCES

[1] Nikola Tesla, “The Transmission of Electrical Energy Without Wires as a Means for Furthering Peace,” Electrical World and Engineer. Jan. 7, p. 21, 1905.

[2] Nikola Tesla, My Inventions, Ben Johnston, Ed., Austin, Hart Brothers, p. 91,1982.

[3] Thomas F. Valone, “ Tesla’s Wireless Energy… For the 21st Century!!! One Step Beyond Direct TV!!!” Extra Ordinary Technology, 1, no. 4, Oct / Nov / Dec 2003.

[4] James O. McSpadden, “ Wireless Power Transmission Demonstration”, Texas A&M University, June, 1997.

[5] Thomas W. Benson , “ Wireless transmission of power now possible”, News Letter, pp1118 – 9, March , 1920.

[6] Charych Arthur (Setauket, NY), “ System and method for wireless electrical power transmission”, Patent No. 6,798,716, September 28, 2004.

[7] Joe T. Howell, et. al , “Advanced receiver / converter experiments for laser wireless power transmission”5th. Wireless transmission conference, pp 1-8, Garanda, Spain,2004.

[8] Nikola Tesla, “ The true wireless”, Electrical Experiments ,May, 1919.

[9] Toby Grotz,” Wireless transmission of power”, Courtesy of the Tesla BBS at 719 486-2775, August 28, 1990.

Assistant professor in lord venkateswara engineering college.I am doing phd in sathyabama university, Tamil Nadu,India.

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The Period of Wireless Internet

Thursday, September 30th, 2010

Wireless internet connections have many advantages. If you are a businessman and run your own business then WiFi is the best solution to access internet and manage your business when you are away from your desk. Even if you are a common user, wireless connection is a good opportunity to chat to relatives, friends, being able to read your mail letters when you are on your holiday and just surf some interesting sites. Positive and practical sides of wireless networks are mobility, rapidness, security and attainability to distant places.

Over the last years broadband width for Wireless networks has considerably increased. This growth rises due to up-to- date technologies and modern devices like mobile phones, laptops, personal digital assistants, iphones, iPods etc. Network by wireless has become faster and more reasonably priced thanks to progress in the bandwidth arena. Now it can transfer data up to two megabytes per second, as usually in the past it was just one megabyte. Furthermore, wireless broadband connection is more secure than a satellite one due to the fact that the signal does not travel in the process of transfer, but goes straight to the recipient. Also, you are pleased with the wireless connection’s speed while downloading web pages. It is rather easy to check your mail letters as well as send them. Interactive functions. Regarding applications like games, audio-video programs, chats, multimember chats, video-conference calls, local networking or wide area network are rather painless to navigate. On the whole, your computer usage becomes more and more efficient.

Wireless connection for rural users means internet access, high rate and comfort as no need to set up additional wires or lines. By the way, you can install such a wireless internet connection so that you can access it within a one-hundred foot radius. Thus, you can move your laptop freely about the house or have a nice cup of tea in your arbor enjoying internet surfing. Now it is no need to sacrifice internet connection if you want to move to another room. Wireless networks means work well for a businessman. He/she can contact any person anytime and anywhere. This is a big advantage. Almost all new PCs have already installed wireless chipsets that allows you to connect internet automatically. It saves you time and does not involve devices or cables. Also any Bluetooth works simply with the wireless connection. To make our life easier, wireless technology enabled us with a wide range of new and advanced wireless gadgets like wireless microphones, wireless headsets, wireless stereo speakers, computer peripherals, televisions.

The leading UK Telecom company can provide you with a piece of advice on wireless broadband internet connectivity. Certainly, we can say that our generation steps a new era. This era is called Wireless Connection. Wireless connection spreads rapidly and we become a wireless society. Technologies for wireless are improving constantly. These described above advantages of wireless connection make our life less stressful. Moreover, it is very valuable and helpful in both professional sphere and personal life. Apply network by wireless and enjoy your life!

MLL Telecom is the top UK Telecom network operator. Who we are? What we do? We work with wire connection, hybrid networks, wireless networks, wide area network for more than 16 years. Thus, we dare to say that the first ?rate quality of our services is guaranteed. If you want to protect you business connectivity, MLL Telecom is glad to help you.

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