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Low Overhead Spectrum Allocation and Secondary Access in Cognitive Radio Networks

ISSN 2223-4985
Journal from gdlhub / 2017-08-14 11:52:31
Oleh : Yee Ming Chen , International Journal of Information and Communication Technology Research
Dibuat : 2012-06-23, dengan 1 file

Keyword : Graph coloring problem; Cognitive radio network; Spectrum allocation
Subjek : Low Overhead Spectrum Allocation and Secondary Access in Cognitive Radio Networks
Url : http://esjournals.org/journaloftechnology/archive/vol2no3/vol2no3_5.pdf
Sumber pengambilan dokumen : Internet

Cognitive radio networks spectrum access, which allows secondary users opportunistically access unused licensed channels to


exploit instantaneous spectrum availability, is a promising approach to achieve efficient spectrum utilization and mitigate


spectrum scarcity. In order to reduce spectrum handoff overhead, this paper propose two heuristic spectrum allocation and


reallocation methods based on graph coloring method. For a given network topology, the proposed spectrum allocation method


first generates an interference graph based on the network topology and interference constraints. Then for secondary access on


a graph coloring algorithm is cooperative spectrum reallocation among secondary users to minimize spectrum handoffs.


Obtained results demonstrate that graph coloring method and algorithms are a promising concept that can enhance the


performance of secondary spectrum usage.

Deskripsi Alternatif :

Cognitive radio networks spectrum access, which allows secondary users opportunistically access unused licensed channels to


exploit instantaneous spectrum availability, is a promising approach to achieve efficient spectrum utilization and mitigate


spectrum scarcity. In order to reduce spectrum handoff overhead, this paper propose two heuristic spectrum allocation and


reallocation methods based on graph coloring method. For a given network topology, the proposed spectrum allocation method


first generates an interference graph based on the network topology and interference constraints. Then for secondary access on


a graph coloring algorithm is cooperative spectrum reallocation among secondary users to minimize spectrum handoffs.


Obtained results demonstrate that graph coloring method and algorithms are a promising concept that can enhance the


performance of secondary spectrum usage.

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