Cellular phone towers are very widespread, and as cellular networks move to third generation (3G) networks they can support fast data; using technologies such as EVDO, HSDPA and UMTS.
These can give broadband access to the Internet, with a cell phone, with Cardbus, ExpressCard, or USB cellular modems, or with cellular broadband routers, which allow more than one computer to be connected to the Internet using one cellular connection.
Power-line Internet
This is a new service still in its infancy that may eventually permit broadband Internet data to travel down standard high-voltage power lines. However, the system has a number of complex issues, the primary one being that power lines are inherently a very noisy environment. Every time a device turns on or off, it introduces a pop or click into the line. Energy-saving devices often introduce noisy harmonics into the line. The system must be designed to deal with these natural signaling disruptions and work around them.
Broadband over power lines (BPL), also known as Power line communication, has developed faster in Europe than in the US due to a historical difference in power system design philosophies. Nearly all large power grids transmit power at high voltages in order to reduce transmission losses, then near the customer use step-down transformers to reduce the voltage. Since BPL signals cannot readily pass through transformers, repeaters must be attached to the transformers. In the US, it is common for a small transformer hung from a utility pole to service a single house. In Europe, it is more common for a somewhat larger transformer to service 10 or 100 houses. For delivering power to customers, this difference in design makes little difference, but it means delivering BPL over the power grid of a typical US city will require an order of magnitude more repeaters than would be required in a comparable European city.
The second major issue is signal strength and operating frequency. The system is expected to use frequencies in the 10 to 30 MHz range, which has been used for decades by licensed amateur radio operators, as well as international shortwave broadcasters and a variety of communications systems (military, aeronautical, etc.). Power lines are unshielded and will act as transmitters for the signals they carry, and have the potential to completely wipe out the usefulness of the 10 to 30 MHz range for shortwave communications purposes, as well as compromising the security of its users.
Wireless ISP
Wireless Internet service provider
This typically employs the current low-cost 802.11 Wi-Fi radio systems to link up remote locations over great distances, but can use other higher-power radio communications systems as well.
Traditional 802.11b was licensed for omnidirectional service spanning only 100-150 meters (300–500 ft). By focusing the signal down to a narrow beam with a Yagi antenna it can instead operate reliably over a distance of many miles, although the technology's line-of-sight requirements hamper connectivity in areas with hilly and heavily foliated terrain. In addition, compared to hard-wired connectivity, there are security risks (unless robust security protocols are enabled); speeds are significantly slower (2 – 50 times slower); and the network can be less stable, due to interference from other wireless devices and networks, weather and line-of-sight problems.
Rural Wireless-ISP installations are typically not commercial in nature and are instead a patchwork of systems built up by hobbyists mounting antennas on radio masts and towers, agricultural storage silos, very tall trees, or whatever other tall objects are available. There are currently a number of companies that provide this service. A wireless Internet access provider map for USA is publicly available for WISPS.
iBlast
iBlast was the brand name for a theoretical bandwidth (7 Mbit/s), one-way digital data transmission technology from a Digital TV station to users that was developed between June 2000 to October 2005.
Advantages:
1. Low cost, broadband data transmission from TV station to users. This technology can be used for transmitting website / files from Internet.
Disadvantages:
1. One way data transmission. 2. Privacy/security. 3. Lack of 8VSB tuner built into many consumer electronic devices needed to receive the iBlast signal.
In the end, the disadvantages outweighed the advantages and the glut of fiberoptic capacity that ensued following the collapse of the Internet bubble drove the cost of transmission so low that an ancillary service such as this was unnecessary, and the company folded at the end of 2005. The partner television stations as well as over 500 additional television stations not part of the iBlast Network continue to transmit separate digital signals as mandated by the Telecommunications Act of 1996.
WorldSpace
WorldSpace is a digital satellite radio network based in Washington DC. It covers most of Asia and Europe plus all of Africa by satellite. Beside the digital audio, users can receive one way broadband digital data transmission (150 Kilobit/second) from the satellite.
Advantages:
1. Low cost (US$ 100) receiver that combines a digital radio receiver and a data receiver. This technology can be used for transmitting websites / files from Internet. 2. Access from remote places in Asia and Africa.
Disadvantages:
1. One way data transmission. 2. Privacy/security.
Pricing
Traditionally, US Internet service providers have used an "unlimited time" or flat rate model, with pricing determined by the maximum bitrate chosen by the customer, rather than an hourly charge. With increased consumer demand for streaming content such as video on demand and peer-to-peer file sharing, the use of high bandwidth applications has increased rapidly.
For ISPs who are bandwidth limited, the flat rate pricing model may become unsustainable as demand for bandwidth increases. Fixed costs represent 80-90% of the cost of providing broadband service, and although most ISPs keep their cost secret, the total cost (January 2008) is estimated to be about $0.10 per gigabyte. Currently some ISPs estimate that about 5% of users consume about 50% of the total bandwidth. In order to provide additional high bandwidth pay services without incurring the additional costs of expanding current broadband infrastructure, Internet Service Providers are exploring new methods to cap current bandwidth usage by customers.This is despite the lagging broadband infrastructure in the United States, according to the Economic Policy Institute: "The United States has also fallen behind other countries in the deployment of new broadband technologies."
Some ISPs have begun experimenting with usage-based pricing, notably a Time Warner test in Beaumont, Texas. The effort to expand usage-based pricing into the Rochester, New York area met with public resistance, however, and was abandoned.Bell Canada has imposed bandwidth caps on customers.
An often overlooked analysis when choosing an Internet provider is comparing the different DSL and cable Internet services at the plan level. Doing so will ensure that consumers do not overpay for a bandwidth they will not utilize.
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