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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳健輝(Gen-Huey Chen),吳曉光(Hsiao-Kuang Wu) | |
| dc.contributor.author | Shao-Yi Hung | en |
| dc.contributor.author | 洪韶憶 | zh_TW |
| dc.date.accessioned | 2021-06-13T02:05:16Z | - |
| dc.date.available | 2007-07-17 | |
| dc.date.copyright | 2007-07-17 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2007-07-02 | |
| dc.identifier.citation | [1] 'Spectrum policy task force,' Federal Communication Commission, Rep. 02-135, Nov. 2002.
[2] S. Haykin, 'Cognitive radio: brain-empowered wireless communications,' Selected Areas in Communications, IEEE Journal on, vol. 23, no. 2, pp. 201-220,2005, 0733-8716. [3] D. C. S. M. M. R. W. Broderson, A. Wolisz and D. Willkomm, 'Corvus: A cognitive rasio approach for usage of virtual unlicensed spectrum, White Paper,' 2004. [4] J. Mitola, 'The software radio architecture,' Communications Magazine, IEEE, vol. 33, no. 5, pp. 26-38, 1995, 0163-6804. [5] M. J. III and M. G. Q. Jr., 'Cognitive radio: making software radios more personal,' Personal Communications, IEEE [see also IEEE Wireless Communications], vol. 6, no. 4, pp. 13-18, 1999, 1070-9916. [6] J. Mitola, 'Cognitive radio: An integrated agent architecture for software defined radio,' Ph.D. dissertation, The Royal Institute of Technology (KTH), 2000. [7] 'IEEE 802.22, the working group on wireless regional area networks ('wrans'), http://www.ieee802.org/22/.' [8] C. Cordeiro, K. Challapali, D. Birru, and S. Sai, 'Ieee 802.22: the first world-wide wireless standard based on cognitive radios,' in New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005. 2005 First IEEE International Symposium on, 2005, pp. 328-337. [9] D. X. WG, 'The xg architecture framework, version 1.0,' 2003. [10] I. F. Akyildiz, W.-Y. Lee, M. C. Vuran, and S. Mohanty, 'Next generation/dynamic spectrum access/cognitive radio wireless networks: A survey,' Computer Networks, vol. 50, no. 13, pp. 2127-2159, 2006. [11] D. Cabric, S. M. Mishra, and R. W. Brodersen, 'Implementation issues in spectrum sensing for cognitive radios,' in Signals, Systems and Computers, vol. 1, 2004, pp. 772-776 Vol.1. [12] T. Fujii and Y. Suzuki, 'Ad-hoc cognitive radio - development to frequency sharing system by using multi-hop network,' in New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005. 2005 First IEEE International Symposium on, 2005, pp. 589-592. [13] H. Shang-Ching, H. Shao-Yi, E. H. K. Wu, and C. Gen-Huey, 'A decentralized CR system algorithm for cognitive borrowing scheme from primary users,' in Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on, 2006, pp. 1-5. [14] N. Devroye, P. Mitran, and V. Tarokh, 'Achievable rates in cognitive radio channels,' Information Theory, IEEE Transactions on, vol. 52, no. 5, pp. 1813-1827, 2006, 0018-9448. [15] B. Wild and K. Ramchandran, 'Detecting primary receivers for cognitive radio applications,' in New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005. 2005 First IEEE International Symposium on, 2005, pp. 124-130. [16] N. Hoven and A. Sahai, 'Power scaling for cognitive radio,' in International Conference on Wireless Networks, Communications and Mobile Computing, vol. 1, 2005, pp. 250-255 vol.1. [17] H. Yamaguchi, 'Active interference cancellation technique for mb-ofdm cognitive radio,' in Microwave Conference, 2004. 34th European, vol. 2, 2004, pp. 1105-1108. [18] V. D. Chakravarthy, A. K. Shaw, M. A. Temple, and J. P. Stephens, 'Cognitive radio - an adaptive waveform with spectral sharing capability,' in Wireless Communications and Networking Conference, 2005 IEEE, vol. 2, 2005, pp. 724-729 Vol. 2. [19] N. Nie and C. Comaniciu, 'Adaptive channel allocation spectrum etiquette for cognitive radio networks,' in New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005. 2005 First IEEE International Symposium on, 2005, pp. 269-278. [20] J. O. Neel, J. H. Reed, and R. P. Gilles, 'Convergence of cognitive radio networks,' in New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005. 2005 First IEEE International Symposium on, vol. 4, 2004, pp. 2250-2255 Vol.4. [21] T. Mansi, S. Venkatesan, P. Ravi, and R. Chandrasekaran, 'Mac-layer scheduling in cognitive radio based multi-hop wireless networks,' 2006, 1139406 191-202. [22] C. Peng, H. Zheng, and B. Y. Zhao, 'Utilization and fairness in spectrum assignment for opportunistic spectrum access,' Mobile Networks and Applications, vol. V11, no. 4, pp. 555-576, 2006, 10.1007/s11036-006-7322-y. [23] C. Frederico, C. Marco, and G. Enrico, 'Dynamic tuning of the ieee 802.11 protocol to achieve a theoretical throughput limit,' IEEE/ACM Trans. Netw., vol. 8, no. 6, pp. 785-799, 2000, 358920. [24] 'The network simulator ns2. http://www.isi.edu/nsnam/ns/.' | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/30492 | - |
| dc.description.abstract | 近幾十年來，隨著無線網路的成長以及相關應用服務的開發，市場對於無線頻譜的需求急速增加。但最近已有不少研究報告指出，分配固定頻帶執照給特定使用者的這種傳統分配資源方式，並沒有充分利用有限的頻帶。當頻帶的擁有者沒有使用其頻帶時，這個頻帶就會一直呈現無人傳輸的狀態。在感知型無線網路的概念被提出後，這種浪費頻寬的情形即將獲得改善。它創新的概念，允許第二種使用者在頻帶所有人不使用其頻帶時，得以有效利用這空閒的資源，以提高整體頻譜的效能。這是前所未有的想法，打破了頻帶與頻帶間的界線進行傳輸，因此感知型無線網路需要一個新的媒體存取層協定，使其適應變動快速的環境並進行傳輸。這篇論文提出了一個新興的感知型無線網路媒體存取層協定(Opportunistic Cognitive MAC Protocol)，使感知型無線網路設備可以有效利用空閒的資源，與該頻段和平共存。這項協定藉由預測高優先權使用者的行為和禮讓性的傳輸規則，避免對資源擁有者造成致命的傷害。接著，我們對於這項協定進行傳輸瓶頸以及公平性的分析。最後，在ns2網路模擬器上的實驗結果證明，OC-MAC的預測模組與禮讓機制，使得我們的媒體存取層設計可以有效的提升原本網路8.74%的整體使用率至37.49%，而且對頻帶擁有者只造成了0.52%的碰撞。這效能甚至是我們在2006年提出之協定的九倍。這些數據證明了OC-MAC可以有效地達成感知型無線網路的目標。 | zh_TW |
| dc.description.abstract | In last decades, the demand of wireless spectrum has increased rapidly with the development of mobile communication services. Recent studies recognize that traditional fixed spectrum assignment does not use spectrum efficiently. When licensees are not transmitting, spectrum remains idle. Such a wasting phenomenon could be amended after the present of cognitive radio. Cognitive radio is
a new type of technology that enables secondary usage to unlicensed user. Because its innovative idea overthrows the exclusive spectrum policy, cognitive radio requires a new open spectrum access protocol to transmit intelligently in fluctuant environment. This thesis presents a MAC protocol, namely Opportunistic Cognitive MAC Protocol (OC-MAC), for cognitive radios to access unoccupied resource opportunistically and coexist with wireless local area network (WLAN). By a primary traffic predication model and transmission etiquette, OC-MAC avoids to producing fatal damage to licensed users. Then We examine and analyze the design of OC-MAC in the aspects bottleneck and fairness. Finally, a ns2 simulation model is developed to evaluate the performance of OC-MAC in scenarios with coexisting WLAN and cognitive network. The results indicate OC-MAC enhances network utilization from 8.74% to 37.49% and only results in 0.52% collision to legacy users. The efficiency is almost nine times of our former work while with the same level of damage. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T02:05:16Z (GMT). No. of bitstreams: 1 ntu-96-R94922060-1.pdf: 1866496 bytes, checksum: 5786b808a64d3c0b934116211331a3bb (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | 1 Introduction 1
1.1 Spectrum Assignment Policy and Utilization . . . . . . . . . . . . . . 2 1.2 Cognitive Radio Technology . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 MAC Protocol over CR Network . . . . . . . . . . . . . . . . . . . . . 4 2 Related Work 7 2.1 Distributed Heuristic MAC Scheduling . . . . . . . . . . . . . . . . . 7 2.2 Vertex-labeling Spectrum Allocation . . . . . . . . . . . . . . . . . . 8 2.3 Decentralized Cognitive MAC . . . . . . . . . . . . . . . . . . . . . . 9 2.4 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 Opportunistic Cognitive MAC Protocol (OC-MAC) 11 3.1 Basic idea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.2 Protocol Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.2.1 Data structure . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.2.2 Prediction of transmission duration . . . . . . . . . . . . . . . 15 3.2.3 Evaluating function . . . . . . . . . . . . . . . . . . . . . . . . 15 3.2.4 Channel reservation and transmission policy . . . . . . . . . . 16 3.2.5 Deferral rules . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.2.6 Collision avoidance . . . . . . . . . . . . . . . . . . . . . . . . 21 4 Protocol Analysis 22 4.1 Bottleneck Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.2 Fairness Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5 Performance Evaluation 24 5.1 Network Environment . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.2 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 6 Conclusion & Future Works 34 Reference 36 | |
| dc.language.iso | en | |
| dc.title | 感知型無線網路之網路存取層設計 | zh_TW |
| dc.title | An Opportunistic Cognitive MAC Protocol for Coexistence with WLAN | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 95-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 蔡子傑,王藏億,周承復 | |
| dc.subject.keyword | 感知型無線網路,網路媒體存取層協定,機會式頻帶分享,公用式網路存取,跨網路各層整合性設計, | zh_TW |
| dc.subject.keyword | Cognitive Radio,MAC Protocol,Opportunistic Spectrum Sharing,Open Spectrum Access,Cross-layer design, | en |
| dc.relation.page | 38 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2007-07-03 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 資訊工程學研究所 | zh_TW |
| 顯示於系所單位： | 資訊工程學系 | |
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|---|---|---|---|
| ntu-96-1.pdf 目前未授權公開取用 | 1.82 MB | Adobe PDF |
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