User:Sandeepreddyus

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Mesh Wi-Fi by L.M.Sandeep, Thondavada

The technology uses the de-licensed spectrum of 2.4 GHz. The spectrum is good enough for most Point-to-Multipoint connections and Point-to-point backhaul connections. The technology allows a cloud of Internet over an entire city by meshing access points (transmitters) providing an anytime anywhere network access.

The network can be built in a matter of days. The network is non-line-of sight (NLOS) for a distance of 0.5 Kilometers around an access point. Its Line-of-sight operation, with access points installed at highest points in the neighborhoods, can extend to typical distances of 15 + Kilometers. The access points can either be placed on tall buildings, water tanks or cellular towers available through out the city. This is to achieve better coverage through Line-of-sight operation.

Wireless Broadband with mesh Wi-fi technology is being offered in several towns around Dallas, Texas and Seattle, Washington state has overcome several disadvantages of Wi-fi hot zone model and made the metro-wide Broadband Wireless coverage a reality. The technology is providing up to 15 miles coverage (with Line of Sight to the TV tower) in a city in Louisiana state in U.S.A. City of Garland, Texas, a suburb of Dallas, Texas has built a mesh Wi-fi network for all the government and police communications by installing 6 nodes for the entire city of 15 X 18 miles. Philadelphia and Atlanta are planning to install mesh networks in covering the entire cities in the next 6 months. These two cities are in the 10 largest cities list in U.S.A, covering more than 350 sq. km each. This wireless network is competing with DSL offerings by Incumbent Local Carriers.

Fault Tolerance and High availability:

Our network is designed to be resilient to Failure of Other nodes in the network. The network is self-healing and can re-route the data traffic in the rare event of failure of any node in the original traffic path. Our network engineer’s will ensure that there is no single point of failure. The network does this by discovering the routes along which messages can be passed. The network makes sure these routes do not contain loops and tries to find the shortest route possible. The network is also able to handle changes in routes and can create new routes if there is an error.

We are also ensuring that there is no failure due to natural calamities like rain and lightning all our network nodes are protected by most powerful and latest lightning arresters, which thwarts the lightning from damaging the network nodes Advantages of our wireless technology

Broadband technology is mature, reliable and can reach the rural areas that are not accessible to wireline broadband technologies like DSL and Cable.

Robust security for the data of the customer. Cannot be tapped in transit.

No physical connection required: The customer need not have wire running into their homes or office to gain access to high speed Internet.

Service providers like telephone carriers, due to distances from their telephone exchanges, often ignore semi-urban and even urban suburbs. These areas can be well served with Broadband wireless technology.

PORTABILITY is one of the strongest advantages of the design.

A customer can carry his modem/set-top-box and instantaneously connect to the broadband Internet from a different building.

Access Anytime – Anywhere: Network access is assured at all times and from all locations. No missed E-mails and increased productivity due to constant connectivity.

MOBILITY is the greatest convenience of the design. A customer can sit outdoors with his computer and get connected to high speed Internet. Link layer mobility is achieved in this technology.

No geographical limitations: A user can take a handheld or laptop computer anywhere without losing the connection in their home.

Service connection can be provided to the customers in a matter of hours. It typically takes days for DSL and cable to provide the connection.

Wireline high-speed services in India, where the wires carrying the data are over-head wires, are prone to frequent disruptions.

Normal Emergencies: A rapidly deployable and robust communications between each member when firemen are involved in difficult operations inside buildings, towers, or surrounded in forest fires

Catastrophe Emergencies: When emergency and medical services personnel establish a wireless network to communicate with each other after a catastrophe has destroyed the regular communication infrastructure

Wireless connectivity to rural areas The Last Mile Connectivity to the rural areas in Andhra Pradesh is a major challenge for the System integrators. The Wireless technology of CRR Wireless can be a great solution for broadband connectivity from Mandal Headquarters to end customers in Villages. It can also be the primary or secondary connection from Mandal Head quarters to District Head Quarters. Wireless connectivity of campuses of institutes of higher education

Blanketing a complete campus of an institute of higher education will enable the students and faculty of the institutes to connect to the high speed Internet from anywhere in the campus. This will result in a dramatic rise in the productivity of the institution.

Wireless connectivity of Government and Corporate office buildings

The present day executive requires Broadband access in the conference rooms as well as in his office. A conference rooms typically has multiple meeting participants connecting to the Broadband. This is best accomplished by providing Wireless Broadband connectivity at all the necessary points in an office building

The company has demonstrated a viable solution at the secretariat of Maharashtra (also known as Mantralaya) and is working on providing Wireless mesh connectivity for all the conference rooms and offices of ministers and the secretaries of the Maharashtra government.

Wireless connectivity of campuses of institutes of higher education

Blanketing a complete campus of an institute of higher education will enable the students and faculty of the institutes to connect to the high speed Internet from anywhere in the campus. This will result in a dramatic rise in the productivity of the institution.

Wireless connectivity to Law enforcement agencies and Medical personnel

Normal Emergencies: A rapidly deployable and robust communications between each member when firemen are involved in difficult operations inside buildings, towers, or surrounded in forest fires

Catastrophe Emergencies: When emergency and medical services personnel establish a wireless network to communicate with each other after a catastrophe has destroyed the regular communication infrastructure

Innovative solutions from CRR Wireless

The company has developed and acquired innovative components like Smart antennas, which will make this technology affordable to the common man in India. The premise with which the technology has been perfected is to bring this technology to the rural masses of India.

The Technology of Smart Antenna It’s an electronically steer able antenna. It forms pencil like beam for both point-point & point-multi point modes and then it locks on to the wireless modem The beam after getting locked on to the client avoids dead spots by moving the electronic beam with wireless modem. It works on horizontal polarity which superior to vertical polarity

[Hardware and Software needed for our Wireless Broadband]

The company has all the hardware and software components and maintains a supply chain of all the assets listed below to provide Last mile wireless connectivity.

Smart antenna powered Wireless modems needed for the service.

Access points and Transmitters needed for Broadband Wireless Access (BWA) service.

The Network Management Software (NMS) and a Network Operations Center (NOC) needed to do a 24X7 monitoring of the service for the subscribers.

Passive components like amplifiers, CAT 5 cable needed to offer a superior service.

Next generation in Mesh Wi-Fi The next extension of WiFi "mesh networks" is to add VoIP to it. This could in theory render cell phone carriers obsolete! Think about it. A SIP-enabled PDA or WiFi-enabled cell phone can logon to the Internet via the WiFi mesh network and make phone calls for FREE! Of course, the mesh networks no doubt will charge something for the data/Internet access, but if you are like me and you want Internet access anywhere you go, and are willing to pay for it, then having voice access (via VoIP) is just icing on the cake! Well I was intrigued to learn that there is a company that is providing VoIP using the SIP protocol across a WiFi mesh network. The LocustWorld MeshAP now supports standards based Voice over IP, with SIP routing capability at every node. Now the mesh can be used to provide high quality wireless IP telephony, in addition to established wireless broadband services. Meshing allows network operators to provide services over large areas, and these new telephony routing features let operators offer voice services to customers throughout the range of their mesh.

Voice over IP has been a long time coming, but recent developments mean that the waiting is now over. LocustWorld have brought together the latest developments in VOIP using the SIP protocol to deliver a fully workable system with the capacity to cover very large areas. -Using SIP on the Mesh users can : - Make and receive calls to any SIP compatible phone service - Use wired or wireless devices over the mesh for full function telephony services - Roam all over the mesh, using the same phone number - Call to other Internet users for no charge Until recently there was a shortage of free SIP client software and cheap hardware devices. Today there are many free client soft-phones for almost every platform and with the industry standard SIP protocol being the most widely supported. Hardware SIP phones are now priced within the reach of most consumers and WiFi based mobile SIP handsets are now entering the market in mass produced numbers.

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