A Survey on Rural Broadband Wireless Access Using Cognitive Radio Technology: IEEE 802.22 Wireless Regional Area Networks
Universal Journal of Communications and Network
The previous and most popular broadband wireless technology i.e. WiMAX which is limited about to 10 miles, there are power and line of sight issues yet to be resolved for a broader coverage area. WiMAX deployment is therefore limited to densely populate metropolitan areas. What about rural and sparsely populated, geographically dispersed regional areas? Here is the upcoming solution for that which is implemented by IEEE .The IEEE 802.22 standard defines a system for a Wireless Regional Area
... s Regional Area Network i.e. WRAN that uses unused or white spaces within the television bands between 54 and 862 MHz, especially within rural areas .The 802.22 standard is the first standard to adopt cognitive radio spectrum sensing as a means of gaining greater use of the radio spectrum. Cognitive radios are to provide broadband wireless access (BWA) in the licensed TV bands on a secondary access basis. This concept is examined to see under what conditions BWA could be viable. Rural areas require long range communication which cognitive radios may not be able to support with enough secondary spectrum. By using cognitive radio networking techniques, it is able to sense the environment and adjust the network to accommodate any changes. In this paper we present the complete overview and broad survey of this CR based WRAN technology, how it will be fulfill the upcoming challenges and other factors and some survey based comparisons between and IEEE 802.16 WiMAX and IEEE 802.22 WRAN. Also we list some of the minor and major security issues regarding to this IEEE 802.22 standard technology.