Wireless telecommunications, which is communication using radiowaves, is quickly becoming the dominant factor in the development of infrastructure in the emerging economies.
Radio’s use for mobile services as well as microwave links, mobile telephone and broadcasting is widely known and widely used. Recently, however, it has been introduced to this scene is broadband radio that do not only offer the traditional wired services such as telephone and internet access, but also offer high-speed data transmission and access to digital TV. They are freed from the bandwidth restrictions as well as the costs of deployment and security issues of copper wires, Wireless site survey offer public services that weren’t even thought of just a couple of years ago.
In addition, the speed of use of these services as submarket segments in a number of industrialized countries has been sufficient to propel technological advancement and the pricing of devices until they become affordable in the less developed countries. In actual fact, the price of deployment of wireless technology is significantly lower than traditional copper wire technology .
From a technical point of view From a technical perspective, three opportunities for wireless communications illustrate the current trend. Local loop wireless, also called “WLL” is a direct substitute for the traditional telephone line for home or office. High-speed data transmission referred to as Wireless Digital Data or “WDD” provides commercial or Internet access to information at speeds that are not available over phone lines. Multichannel digital television distribution often referred to by the name “MMDS” allows a direct route to televisions at home with an array of programming options.
Another benefit of these technologies is that a well planned network, equipped with a suitable frequency spectrum, is able to accommodate all types simultaneously. The most cost-effective method for providing these services to emerging markets is to utilize digital bandwidth to the maximum extent possible. This was recently recognized by the United States Federal Communications Commission that has authorized spectrum without content restrictions or usage restrictions, except for those that are necessary to shield others from interference from frequencies.
These services all run on frequencies within the range of 2000-3000 megahertz. The allocation of 200 megahertz of this spectrum allows for the efficient creation of systems that provide the best services with a minimum costs at first. A lot of low-cost consumer hardware devices are designed to operate between 2500 and 2700 megahertz. This is a frequency range that is not in conflicts with satellite signals across the globe. Furthermore that spectrum is used in a limited manner to provide microwave interconnects to infrastructure-based transmitting points. This ought to be readily available, depending on the local requirements for design.
Wireless local loop is similar to local phone service but is far more reliable. The WLL system is used to serve the local area by installing many base stations that transmit and receive multichannels that are in the vicinity of the customers who are intended to use it. Each customer has an unpowered mini-station and into which the phone (or an PBX) connects. In the event that calls come in through the telephone, it informs the base station to establish a connection. The connection is established by a switch central similar to conventional telephone. The caller is recognized by the switch center, and then routed towards the central station designated to the telephone calling. The wireless connection is created, and the call concluded in a normal manner.
In the way described, the complete rural or metropolitan telephone system could be constructed and operated in a way that is which is completely transparent to users. No wires are required and no access to public roads is needed, and all concerns of theft and security issues of the plant are eliminated. With no outside plants, the reliability of WLL is dramatically increased, due to the fact that well-designed WLL facilities do not be affected by weather vandalism, mishaps, and other accidents.
The most important thing is that WLL systems have more bandwidth than conventional telephone systems, top customer service capabilities and high-quality are available. WLL systems provide high-quality signals, data transfer, as well as all the latest customer service functions.
The design of the infrastructure for WLL systems typically utilizes the most advanced transmission technology, like CDMA that allows support for massive subscriber bases by arranging expansion of stations. These systems are able to provide a mix of urban and rural coverage which allows modern telephone services to be economically expanded to populations that are less fortunate. Payphones that are public are also supported.
High-speed data is now an essential part of modern day personal and business. Before the advent of Wireless Digital Data there was no cost-effective method to deliver megabyte data streams. However, the enormous demand for data in modern business and the increasing use by business and personal users of the Internet has made this transmission essential.
WDD is a wireless network technology which can be used in a variety of varieties. The most common configuration is broadband data transmitters that are located strategically to send the broadband stream of data to antennas in the main users within a specific market. Receiving facilities with lower bandwidth, like WLL, or phone access, are set up to provide a return route to complete the two-way data connection. In general, less expensive connection with lower bandwidth is possible for a portion of the WDD connection, but full broadband connectivity is offered to customers who require it.
It is the WDD network is linked to internal computer servers and routers that control the flow of customer data as well as the interconnection with other satellite, microwave or fiber optic high-speed data backbone networks.
Multichannel wireless digital TV or MMDS is a technique that allows simultaneous distribution of hundreds of television shows to viewers. By strategically locating, low-power transmitters to transmit multichannel signal, MMDS is able to “blanket” a region with reception capabilities that may not be financially or physically feasible using conventional cable television.
The equipment that subscribers receive is affordable, easy to installed and maintenance-free. It is programmed to respond only to approved channels, which allows of the identical network be used to support entertainment as well as education, private conferencing and other government channels with no conflict and with complete security. Furthermore, the technology can be able to support high-quality “high definition TV” in the near future.
MMDS systems can also accommodate an amalgamation of digital and analog transmission, which allows the possibility of transferring between an earlier “conventional” analog TV offering to an “state-of-art” full digital facility in response to demand from subscribers.