| Presentation | 2008-10-22 A Dual-Level Management Scheme of Cognitive Radio Wireless Network Chen SUN, Hiroshi HARADA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A cognitive radio system (CRS) senses the radio spectrum environment and adaptively use unoccupied spectrum resource. The CRS should optimize between two conflicting goals for different applications. One is the minimization of interference to primary users and the other is the maximization of usage of spectrum opportunities of the secondary users. In this paper, we propose a dual-level management scheme that performs spectrum analysis and access decision making at both network level and terminal level. Using this scheme, secondary users obtain the distribution of the silent period and control their sensing performance. A closed-form optimal threshold is obtained using the maximum a posteriori (MAP) rule based on the distribution of the silent period of primary users. Furthermore, applying this optimal detection threshold, we set up an analytical model to study the tradeoff between protection to primary users and spectrum usage of secondary users. Results show that the optimal threshold changes according to the duration of sensing. Furthermore, increasing the duration of sensing might not necessarily improve the protection to primary users. Using this analytical model, the scheme chooses sensing period conditioned on the distribution of silent period of licensed users for specific applications. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | cognitive radio / sensing / silence period / collision / throughput / maximum a posteriori (MAP) |
| Paper # | SR2008-38 |
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| Conference Information | |
| Committee | SR |
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| Conference Date | 2008/10/15(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Software Radio(SR) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Dual-Level Management Scheme of Cognitive Radio Wireless Network |
| Sub Title (in English) | |
| Keyword(1) | cognitive radio |
| Keyword(2) | sensing |
| Keyword(3) | silence period |
| Keyword(4) | collision |
| Keyword(5) | throughput |
| Keyword(6) | maximum a posteriori (MAP) |
| 1st Author's Name | Chen SUN |
| 1st Author's Affiliation | New Generation Wireless Communications Research Center Nation Institute of Information and Communication Technology (NICT)() |
| 2nd Author's Name | Hiroshi HARADA |
| 2nd Author's Affiliation | New Generation Wireless Communications Research Center Nation Institute of Information and Communication Technology (NICT) |
| Date | 2008-10-22 |
| Paper # | SR2008-38 |
| Volume (vol) | vol.108 |
| Number (no) | 250 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |