Author(s)

Xiaoyan Liu, Qingyi Quan, Peng Lei, Wenbin Guo, Wenbo Wang

WSPN Lab. Key Laboratory of Universal Wireless Communication, Ministry of Education, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, China.

Cognitive Radio (CR) is a promising technology to increase the efficiency of spectrum by opportunistic access. However, in many cases the sensed spectrum is so broken that it cannot be utilized sufficiently with traditional continuous spectrum allocation strategy. Spectrum aggregation can make full use of narrow spectrum fragments while the overhead it brings may reduce the overall performance of the system. This paper proposes a Mixed Contiguous and Aggregated Spectrum Allocation (MixCASA) algorithm for CR based TD-LTE Networks. This algorithm combines contiguous with discontiguous spectrum allocation together in order to guarantee the feasibility and efficiency of system. Simulation results show that the MixCASA algorithm can increase the number of allocated channels, and reduce the overhead brought by excessive spectrum aggregation as well.

Cognitive Radio; TD-LTE; Spectrum Allocation; Spectrum Aggregation

Liu, X. , Quan, Q. , Lei, P. , Guo, W. and Wang, W. (2013) Mixed Contiguous and Aggregated Spectrum Allocation Algorithm for CR based TD-LTE System. Communications and Network, 5, 298-302. doi: 10.4236/cn.2013.53B2055.