WiMAX Limtations - WiMAX Deployment Limitations

A general perception for WiMAX is that it delivers high speed data that is 70 Mbps 50 kilometers, but in factual situation WiMAX do some thing different. It increase Bit error rate if it operates at 50 kilometers, that’s why it important to use lower bitrates. If the range is low it helps in operating at higher bitrates.

As we know, there are majorly two types of WiMAX, fixed WiMax and Mobile WiMax, in fixed WiMAX network higher gain directional antenna is installed near the subscriber location which helps in increasing signal strengths, better data rate and throughput. However mobile networks are designed for indoors, it uses customer premises equipment (CPE) which is attached with computers and laptops or other WiMax products.

In mobile WiMax Omni directional antennas are used, which have lower-gain when compared to directional antenna; directional antennas are easy to use as they portable. 10 Mbps speed can be achieved within 10 km range if portable mobile WiMAX CPE used in line-of-sight. In contrast to this 10 Mbps speed can be delivered to only 2 km in urban areas as it is not possible to keep antenna on line-of-sight.

In current situation fixed WiMax throughputs 2Mbps at 10 km using high gain antenna. Higher gain directional antenna can be used with Mobile WiMax networks with good range and throughput but in result loose mobility.

As in all wireless or wired networks, the given bandwidth is divided among the users, it is same in WiMax also, available bandwidth is divided among the users in certain radio sector, and performance of the network can drop in case of many users in give sector. To improve the performance in this situation more radio cards are required to be installed in the base station for give sector.

Because of this varying performance of WiMax networks, lots architectures are incorporated into WiMax by independent development and within the 802.16j mobile multi-hop relay (MMR) task group.

WiMAX Features

WiMax have lots of features to its name. Lots of limitations were found as the use of Wifi technology grew around the world, to overcome these limitations and to invent better and more efficient wireless technology was realized which turned out to be WiMax. WiMax have lots of features which helped in increase usability of WiMAX around the world. It is still not been used to its full potential that’s why there may be more features which may not be known as yet, more and more exploration is required to get WiMax technology to its full use, however we know some of its significant features which are important enough to mention.

• Long Rang

Connectivity from long range is much highlighted feature of WiMax. Theoretically it is believed that WiMax technology provides range up 30 mils (50 Km). However in practical experience it is observed that it provides range up to 10 km which is still huge break through in long range connectivity. Users can connect to WiMax base station using SUI from their homes.

• Mobility

Another significant feature of WiMax technology is the connectivity on move. This technology amaze the world hence increasing the use of WiMax in some parts of the world dramatically. Especially to the urban places where cables and other network equipments are not feasible to install. Using its long range feature it provides connectivity on such area where other means of high speed Internet are not available.

The other major mobility feature of WiMax technology is that connecting devices (Laptops, PDA etc) can move in certain area and still be connected to the network.

• Interfacing
  
  

WiMax radio signals are broadcasted to its subscribers from base stations. Base stations are area where all necessary hardware is installed to provide WiMax with in its range. Since one Base station covers limited range so connecting multiple base stations to each other increase that much range for connectivity. Connecting multiple base stations to each other is not big task and can be perform in few hours.

• Accessibility

Accessing WiMax base station is not a difficult task, its long range capability provides connectivity at home from base stations within the range. To get high speed internet it’s only required to be because subscriber to WiMax service providers. They will provide you appropriate hardware to become of the subscriber. Installing the hardware is very easy; it is just plug and play. Hardware mostly connects through USB ports or Ethernet and connection can be made by clicking just a button.

There may be several other features which will surely come up as the growth of WiMax technology increases.

WiBro-wireless broadband internet - WiMax

WiBro is better than WiMAX?

The cumbersome and time-consuming negotiations and tests for the WiMAX technology could possibly be the alternative technique to an unexpected WiBro give up. That at least is speculation from the market researcher ABI Research indicates. During the WiMAX Forum is still with compatibility problems and the possible introduction of the IEEE 802.16e substandard employed, the Korean founder of the once dismissed WiBro technology even further: WiBro is already in a position to data on fast-moving equipment to pass. In tests succeeded a broadband connection to a mobile device that is 60 km / h and moving between two base stations to pass.

In Asia, demand for mobile technology is particularly high. Therefore, preparation are already in, two telecommunications companies in South Korea on the large-scale are launching WiBro wireless networks. Sections commend at the beginning of the year 2006. Even Japanese government is the very open and interested in Mobile technology

International Worldwide Interoperability for Microwave Access.

Forum (WiMAX) had official tests of the WiMAX standard IEEE 802.16-2004 for the month of October 2005. WiMAX, which stands for Worldwide Interoperability for Microwave Access. There is a new standard (IEEE 802.16e) for regional radio networks. With theoretically up to 50 km range and a data transfer rate of up to 109 Mbps (at 28 MHz bandwidth) than WiMAX the current WLAN technology, the outdoor use on-3-6 km range. WiMAX wireless LANs can transit voice data, for example voice over Ip protocol (VoIP). This is a special Quality of Service (QoS) mode planned. The WiMAX technology enables broadband connections in those regions were DSL services can not provided.

WiBro is a Korean standard. These Wimax variant is mainly the broadband data with onboard devices support. According to the company's Samsung WiBro allows Handovers for up to 120 km / h and thus as an alternative to mobile technologies of third generation (3G) UMTS as relevant.

For development outfitters WiBro and the Korean Electronics and Telecommunications Research Institute (ETRI)are working together. It had the Korean government in 2002, a frequency band of 100 MHz in the 2.3GHz spectrum for WiBro was released. In June 2004 the standard Phase 1 of WiBro allows a data throughput from 20 to 30 Mbps in cells whose radii of one to five kilometers amount.