DocumentCode :
3430419
Title :
Improved Resource Awareness Channel for Cognitive Radio
Author :
Li, Cuiran ; Zuo, Jie ; Xie, Jianli ; Li, Chengshu
Author_Institution :
Sch. of Electron. & Inf. Eng., Lanzhou Jiaotong Univ., Lanzhou
fYear :
2008
fDate :
12-14 Oct. 2008
Firstpage :
1
Lastpage :
5
Abstract :
Cognitive radio has been considered as an efficient approach to opportunistic spectrum sharing between primary users and cognitive radio users. The most important challenge of a cognitive radio system is to identify the primary users over a wide rage of the spectrum. Considering that the existing sensing techniques would be time-consuming and wasteful of power, Holland etc. give the concept of Resource Awareness Channel (RAC) - a fixed frequency random access channel on which all radios periodically transmit information about which resources are being used by the data that are receiving. In this paper, we propose an improvement on the scheme, for the radio´s transmission on the RAC, we use five different channel access protocols for the control field. Meanwhile, the transmitter-based code assignment is applied for spreading the data portion of each packet based on the idea of joint detection. The success probability for a radio trying to transmit on the RAC is analyzed and the effects on the performance for the transmission power, the period of radio´s transmission on the RAC, and the ratio of data signal lengths in bits for a transmission packet are evaluated. Also, the throughput per packet length is deduced and simulated for different channel access protocols and joint detection capacity.
Keywords :
access protocols; cognitive radio; packet radio networks; probability; wireless channels; channel access protocols; cognitive radio system; cognitive radio users; control field; data portion; data signal lengths; fixed frequency random access channel; joint detection capacity; opportunistic spectrum sharing; primary users; radio transmission; resource awareness channel; success probability; transmission packet; transmitter-based code assignment; Access protocols; Analytical models; Cognitive radio; Computer vision; Detectors; Frequency; Performance analysis; Power engineering and energy; Radio control; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
Type :
conf
DOI :
10.1109/WiCom.2008.300
Filename :
4678209
Link To Document :
بازگشت