It can theoretically deliver download speeds of about 3. But in the real world, speeds are closer to Kbps to Kbps. That said, the next generation of 3G for both technologies is on its way.
And it offers faster speeds. Actual peak download speeds would likely fall around 4. The actual speed is likely to be around 4 Mbps and 6.
By comparison, WiMax can deliver theoretical download speeds to individual users around 10 Mbps to 20 Mbps. But most people using a mobile WiMax service will get between 2 Mbps and 4 Mbps of bandwidth. Why do theoretical speeds differ from actual speeds? There are several variables to consider when it comes to calculating performance of wireless networks. All wireless networks are a shared medium, meaning the more users on the network, the less total capacity is available for individual users.
Also physics plays a role. And distance is always a factor when it comes to wireless technology. Typically, the further a wireless signal travels, the weaker it becomes, which translates into slower bandwidth speeds.
And they actually have more similarities than differences. Both technologies are IP-based and as a result are designed for data rather than voice. And because they are IP-based they will both be able to offer consumers a true mobile broadband experience on portable devices like smartphones and consumer electronics.
Both technologies use the same fundamental technology, OFDM or orthogonal frequency-division multiplexing. This means that companies, such as Motorola and Nokia, will have an easier time developing products and equipment for either network because they can re-use some technology built for one technology.
Who is deploying mobile WiMax in the U. But most of these are fixed deployments in developing markets where WiMax is used to provide broadband to areas without fixed line infrastructure. In the U. WiMAX is cheaper than wired DSL because it does not require placing wires around the area to be covered, which represents an enormous investment for the provider.
Not requiring this investment opens the door to many service providers who can start retailing out wireless broadband with low capital, thereby causing prices to drop due to competition.
Data transferred beyond the limit of this package is paid per excess MB. This can end up being quite expensive for heavy users. On the other hand, WiMAX allows unlimited connectivity for all kinds of data, including data, voice, and video. In these early days of WiMAX integration, the former will be expensive, but the latter quite affordable and even free.
When we subscribed to a WiMAX service some time back, we were given a modem free of charge to be returned at the end of the contract. We only had to pay the monthly fee, which was a flat rate for unlimited access. So finally, WiMAX, especially at home and in the office, can be relatively quite cheap. WiMAX is quite powerful, with a speed of up to 70 Mbps, which is a lot. Now, what comes after determines the quality of the connection you receive. Some providers try to accommodate too many subscribers on one line on their servers , which results in poor performances during peak times and for certain applications.
WiMAX has a range of around 50 km in a circle. Terrain, weather, and buildings affect this range and this often results in many people not receiving signals good enough for a proper connection. Orientation is also an issue, and some people have to choose to place their WiMAX modems near windows and turned in certain specific directions for good reception. At press time, Chernish had been waiting several weeks for his incumbent operator to install a T1 as a backup redundant link to his wireless link in a critical location.
Chernish says he would "love to see the incumbents get taken out of the picture. Graetz says that wireless allows his company to "bypass the incumbent switched network and control the last-mile and overall experience for the customer. He observes that earlier CLECs raised funding to just resell incumbent services. Willis is predicting "early adoption in rural markets and wireless backhaul within the carrier networks" but says the industry won't see broad adoption of WiMax until , when economies of scale are likely to kick in.
Wexler is a freelance writer in Campbell, Calif. She can be reached at joanie wexler. Here are the latest Insider stories. More Insider Sign Out. Sign In Register. Sign Out Sign In Register. Latest Insider. Check out the latest Insider stories here. Many public safety organizations have used Wi-Fi systems to take advantage of the common access and minimal costs available in the license-exempt spectrum bands.
One of the major issues related to Wi-Fi though is the limited range that results from the maximum power available coupled with the restrictions associated with the interference acceptance requirements. In a follow-on effort, the industry has attempted to resolve many of the issues of Wi-Fi by developing the next generation of wireless local area network 1 WLAN technologies. The first wireless local area network WLAN technology called Wi-Fi was developed in under the auspices of the Wi-Fi Alliance to satisfy a demand for short range wireless access for local area networks.
This technology was developed in response to the FCC spectrum allocations for license-exempt use under Part 15 of the Rules. Interestingly, the Wi-Fi standards were developed for specific spectrum allocations as opposed to the WiMAX standards that were developed without any specific spectrum designation. So Wi-Fi was a set of standards developed pursuit to a detailed spectrum allocation, whereas WiMAX was a set of standards developed prior to any specific spectrum allocation and in fact was a standard in search of spectrum.
In general, broadband wireless applications have been expanding rapidly. Future public safety communications applications will demand mobile broadband service, migrating from the current dominant voice-only mode to multimedia applications.
The use of common standards-based commercial technologies naturally supports interoperability and the sharing of commercial or municipal wireless network infrastructures at a lower cost for public safety systems.
As indicated in the previous note, public safety agencies across the country have been able to leverage the widely successful private sector broadband wireless technology, Wi-Fi and Mesh Networks, as a complementary solution for disaster and municipal public safety communications. Several shortfalls to using this method for public safety communications were also addressed.
These include higher data rates, new modulation schemes and access methods; channel bonding that simultaneously uses two separate non-overlapping channels to transmit data; antenna diversity; and spatial multiplexing of multiple independent data streams that are then transferred simultaneously within one channel of spectral bandwidth.
MIMO is a technology that uses multiple antennas for multipath signal diversity to coherently resolve more information than possible using a single antenna. This results in increasing a receiver's ability to recover the data information from the source signal.
0コメント