Mobile WiMAX 802.16 / m is the 'air interface' which offers a new spectrum efficiency and throughput in accordance with the requirements of ITU for 4G technology development kedepannnya. IEEE 802.16 / m is to standardize data transmission speed is higher on mobile devices. Data speeds up to 1Gbps and possible distribution via wireless broadband access is an alternative to cable, DSL, and 3G. Broadband spectrum that is used in the frequency range from 2.3 GHz-3.5 GHz and the use of OFDM / OFDMA (Orthogonal Frequency Division Multiplexing Access). With the use of OFDM / OFDMA is considered to bring efficiency gains in terms of frequency bandwidth, coverage areas, installation and cost. Development by the IEEE 802.16 standardization began in March 2007 and scheduled for completion around the year 2009.

Two new wireless technologies are emerging seem to compete. WiMAX (Worldwide Interoperability for Microwave Access) was born earlier than LTE (Long Term Evolution). In the device and handset vendors support more readily than LTE, WiMAX in 2009. While LTE will be developed after the year 2010. Each of these technologies by the International Telecommunications Union (ITU) will be candidates for 4G network standards (at least 100 Mbps for data transfer) at least in the year 2009.

Mobile WiMAX is a wireless broadband solution that enables mobile and fixed network konfergensi broadband via an extensive radio access technology and flexible network architecture. Water interface on Mobile WiMAX applying Orthogonal Frequency Division Multiple Access (OFDMA) to obtain multi-path performance is better in the environment of Non Line Of Sight (NLOS). To support the growing bandwidth channel (scalable) from 1.25 MHz to 20 MHz, IEEE 802.16e introduces the Scalable-OFDMA (SOFDMA), Mobile Technical Group (MTG) on the WiMAX Forum is developing the Mobile WiMAX system profiles that enable mobile system configured

Mobile WiMAX based on IEEE 802.16e standard enables WiMAX systems applied to portable and mobile applications as well as fixed and nomadic. Mobile WiMAX introduces OFDMA technology (Orthogonal Frequency Division Multiple Multiple Access) and supports several other features to provide mobile broadband services for users in the state of motion up to speeds of 120 km / hr. These features include:

Government and local industry optimistic WiMax operators will be held for the Wimax internet service that is affordable, because the market economies of scale will be quickly achieved.

Suhono Harso Supangkat, special staff Minister for Communications and Information Technology (Communication and Information Minister), said the local industry does not need to worry too much for responding to the high costs that are borne by the operator of the tender results.

Base Station (BS)
Element / WiMAX devices generally consist of BS in the center and the CPE at the customer side. However there is still an additional devices like antennas, cables and other accessories. Is a device transceiver (transmitter and receiver) that is usually installed one location (colocated) with a network of Internet Protocol (IP). From this base station will be connected to multiple CPE interfaces with media of radio waves (RF) WiMAX standard. BS components consist of:

Wireless anything what advantages and disadvantages?

Advantages:
When compared with dial-up
· Fast as broadband access
· IP numbers can change, such as Dial-Up Access
· Can access anywhere, provided in hotspot areas
· Cheap, fast and flexible
· Umbrella for many users in a hotspot.
Disadvantages:
· To use the WiFi we must exist in an area accessible by WiFi or the term 'hotspot'.
· WiFi coverage area is still small, the signal can not penetrate walls.
· Access Point is more easily infiltrated by a virus
· Bugged easy data exchange

WiMAX Benefits
Bandwidth and reach of WiMAX enabled technology is used in the following applications:
Linking one-Wi-Fi hotspot with other Wi-Fi hotspots and the Internet;
-Providing the latest broadband access alternatives other than cable and DSL;
-Provide telecommunications services and high speed data;
-Provide a different source for internet connectivity
as part of the company's sustainability plans. Where, if
a company has an Internet connection and cable-based
wireless, especially from different providers, such connectivity
will not be affected by the unavailability of the same services.