| Autor: |
ZHANG Jing, ZHU Hong-bo |
| Jazyk: |
čínština |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
Tongxin xuebao, Vol 31, Pp 188-194 (2010) |
| Druh dokumentu: |
article |
| ISSN: |
1000-436X |
| Popis: |
Aiming at the opportunistic spectrum access（OSA） system with periodic channel sensing,sensing activity of secondary users was modeled and analyzed with Markov process.Combining physical layer index with MAC layer index,a cross-layer performance measure termed effective transmission capacity（ETC） was introduced.Under the criterion of maximizing ETC,a cross-layer optimal OSA algorithm was proposed and the achievable average ETC of opportunistic spectrum sharing was deduced.Theoretical analysis and simulation results indicate that the proposed algorithm is better than single-layer optimal schemes for it provides the secondary users with higher ETC. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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