| Overview | | | | tower and which can provide coverage to a very |
| Wi-MAX is an acronym that stands for | | | | large area as big as three thousand sq miles. |
| World-wide interoperability fir Microwave access.it | | | | 1. A Wi-MAX receiver and antenna could be like a |
| is an ideal method for ISP to deli ever high speed | | | | PCMIA (personal computer memory card |
| broadband to location where wired connection | | | | international association) card, or they could be |
| would be difficult or costly. | | | | built into a laptop similar to Wi-Fi access. |
| Wi-MAX delivers a point to multi-point | | | | Services Providei) The non-line-of-sight Wi-Fi sort |
| architecture.It doesn't require a direct line of sight | | | | of service, where a small antenna on your |
| between the source and end point and it has a | | | | computer connects to the tower. In this mode |
| service range of 50 KMs. It provides a shared | | | | Wi-MAX uses a lower frequency range 2 Ghz to |
| data rate of up to 70Mbps,which is enough to | | | | 11 Ghz [similar to Wi-Fi]. As lower wavelength |
| service up to a thousand subscriber with high | | | | transmission are not as easily disrupted by |
| speed access. | | | | physical obstruction they provided non-line-of-sight |
| The Main advantage of Wi-MAX are | | | | coverage.ii) The Line of sight services, where a |
| High speed of broadband service up to 70 Mbps. | | | | fixed dish antenna points straight at the Wi-MAX |
| Wire less rather than wired access,so that it | | | | tower from a rooftop or pole. The line 0f sight |
| would be a lot less expensive than cable or digital | | | | connection is stronger and more stable,so it is able |
| subscriber line and much easier to extend to | | | | to send a lot of data with fewer errors. Line of |
| suburban and rural areas. | | | | Sight transmission use higher frequencies,with |
| Broad coverage like the cell phone network | | | | ranges reaching a possible 66 Ghz. At Higher |
| instead of small Wi-fi hot spots, 50 Kms | | | | frequencies, there is less interference and lots |
| Wi-MAX Standards | | | | more bandwidth. |
| 1. IEEE 802.16-2004 is for fixed point to point and | | | | Wi-MAX Specifications |
| point to multipoint wireless access. It is akin to a | | | | - Range 30 Miles radius from base station. |
| faster,airborne version of Digital Subscriber Line | | | | - Speed 70 Mbps |
| [DSL] or cable-modem services.it is also called first | | | | - Line-of-Sight not needed between user and base |
| Non Line-of-Sight, Broadband wireless access | | | | station. |
| [BWA] standard. | | | | - Frequency bands: 2 to 11 Ghz and 10 to 66 Ghz. |
| 2. IEEE 802.16e is for mobile wireless access fir | | | | - Define both MAC and PHY layers and allows |
| laptops and hand held. It is analogous to a faster | | | | multiple PHY layer specifications. |
| version of third generation 3G telecommunication | | | | Conclusion |
| technology. | | | | Wi-MAX is going to provide seamless connectivity |
| Working of Wi-MAX | | | | throughout the geographical area. It is specially |
| Wi MAX op rates similar to Wi-fi but at higher | | | | suited to the requirement of rural as well as urban |
| speeds, over greater distances and for a greater | | | | population. This is also provide an alternative media |
| number of users.it consist of following parts | | | | of telecommunication for the poorest and the |
| A Wi-MAX tower similar in concept to a cell phone | | | | remotest customer. |