Mobile Phone Update

One of the newest technology that is now developing WiMAX technology with wireless standards IEEE.802.16X-2004. WiMAX is a platform that is used in the Metropolitan Area Network (MAN) previously used fiber optic, GSB, FSL.

What is WiMAX? WiMAX stands for Worldwide Interoperability for Microwave Access. This is one form of wireless technology is becoming the focus of telecommunications operators, businesses and Internet users in dunia.WiMAX (Worldwide Interoperability for Microwave Access) solution exists as a limited access to Wi-Fi that in fact are designed for use in space. Uses OFDM technology that is able to provide speed data services up to 70 Mbps within a radius of 50 km. Radius is enough to make WiMax as a broadband telecommunications network to replace fixedline technology. When compared with fixedline WiMAX network installation cost is much cheaper. With WiMAX technology, the dream will service data information

cheap high speed to be realized, cheap quality far more baik.WiMAX come to answer the problem in the broadband sector. When the phone and started to move the local network to wireless systems, broadband access for business or housing still tend to rely on cable for transmitting data. Clearly this is detrimental service to existing customers as well as outside the reach of the cable.

Reports research firm Park Associates, a while ago, there will be about seven million subscribers access to broadband services based on WiMAX at the end of 2009. The operator will initially using WiMAX-based equipment

fixed version, which means more customers intended for housing and offices.

Recently, WiMAX is also a step forward to leave other wireless broadband technologies that are still in the developmental stage. WiMAX standard, which is approved 802.16X2004 industrial world, so that the manufacture and sale of inexpensive devices can be more accelerated. After passing the test and certification, these products may be entered into the market in 2006.

Other WiMAX standard, 802.16e is now also being developed. Function, is more related to the cellular industry, which allows mobile phones to send and receive data greater. WiMAX technology can be a leap besaar for communications companies worldwide, particularly for countries that are developing in Asia. Country that still rely on cable networks. With this technology leap to broadband networks or broadband could be expedited. The reason this makes communications company China and India were interested in joining.

Characteristics WiMAX

To get WiMAX services, requires a special antenna that can be operated by 60 companies with a connection each approximately 1 Mbps.

The main characteristics of WiMAX owned, among others:

In early versions of IEEE 802.16a works at frequencies from 10 to 66 GHz, making it suitable for point-to-point technology.

For this version of IEEE 802.16 can be used for connection nonline outsite (NLOS). Compatible with existing digital switches (ATM, etc.) with the optimal data rate per user between 300 kbps – 2 Mbps and rangenya 5 to 8 km for the maximum throughput. For the version of IEEE 802.16d, the technology appeared in October 2004. The technique is going to solve the canal smallest canals using Op-Amp and Antenna Amart technology. Used for fixed access, which includes a BS and a CPE receiver. BS Proxim Tsunami MP.16 form will be marketed to both telecom operators and user companies. IEEE 802.16e version released this year-end 2004 which will be used to support mobility (Handover, roaming) in the cellular system to 120 km / h and working in NLOS. Used to access mobile applications. Configured for services in rural areas until the maximum radius of 50 km, or services in densely populated areas in cities to a distance of 1 to 4 km, with data rate up to 75 MB / s. Can imagine with this technology, wireless devices point-to-multipoint, broadband, none-line-of-sight (NLOS), last-mile access and allowing complete solutions, expand, and even replacing the network infrastructure using cables. This system supports video streaming technology, VoIP telephony, silent and moving impressions, e-mail, Web browsing, e-commerce, and location-based services.

WiMAX is the key to success is at a frequency that does not require permits and fees, for example, if dibandingkandengan AT & T Wireless to pay billions of dollars to the U.S. government to use exclusively a particular frequency radio waves, which allows these companies provide mobile services or mobile phone to its customers without interruption , but restrict its competitors using the same frequency. WIMAX – IEEE 802.16

WiMAX Components

The main components of the system is WiMAX Subscriber Station (SS) or known as the CPE and Base Station (BS). BS and one or more SS can form a cell with the structure of point-to-multipoint (P2MP). In the air, the BS controls the cell activities together, including access to the media by the SS, the allocation for quality of service (QoS) and manage the subordinate network security. 802.16 systems using antenna at the SS site. These antennas cover the coverage area. Equipment such as Adaptive Antenna System (AAS) and sub-channel is also supported by the standard to link budget planning for indoor installation. IEEE 802.16e standard to work specifically for mobility and support forces to the SS terminal. BS antenna sector generally use d / directional or omni-directional. Fixed SS typically uses directional antenna while mobile or portable SS typically uses directional antenna. Multiple BS can be configured to form a cellular network wirelessw. When Orthogonal Frequency Division Multiplexing (OFDM) is used, including cell radius 30 mile. At the very least, the practical minimum radius of the cell includes approximately 5 mile. 802.16 standard can also be used in point-to-point (P2P) or Mesh topology, using a pair of directional antennas. This can digunkan untuik increase the effective range with a relative system to support P2MP mode. WiMAX vs. Wi-Fi vs. DSL.

My comment:

In my opinion, in the development of wireless technology in this day and age, there is a better ternologi of WiMAX technology. Good progress because of the existence of WiMAX technologies use OFDM is able to provide speed data services up to 70 Mbps within a radius of 50km. With a radius of 50km could make WiMax as a broadband telecommunications network technology to replace fixedline because compared with fixedline WiMAX network installation cost is much cheaper. besides that this technology does not require fees and permission to use a frequency that comes from the U.S. Government.

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