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The spectrum scarcity problem emerged in recent years, due to unbalanced utilization of RF (radio frequency) bands in the current state of wireless spectrum allocations. Spectrum access scheduling addresses challenges arising from spectrum sharing by interleaving the channel access among multiple wireless systems in a TDMA fashion. Different from cognitive radio approaches which are opportunistic and noncollaborative in general, spectrum access scheduling proactively structures and interleaves the channel access pattern of heterogeneous wireless systems, using collaborative designs by implementing a crucial architectural component—the base stations on software defined radios (SDRs). We discuss our system design choices for spectrum sharing from multiple perspectives and then present the mechanisms for spectrum sharing and coexistence of GPRS+WiMAX and GPRS+WiFi as use cases, respectively. Simulations were carried out to prove that spectrum access scheduling is an alternative, feasible, and promising approach to the spectrum scarcity problem.
FCC : Spectrum Policy Task Force Report, ET Docket No. 02-155. November 2002
Chiasserini CF, Rao RR: Coexistence mechanisms for interference mitigation between IEEE 802.11 WLANs and Bluetooth. Proceedings of the 21st Annual Joint Conference of the IEEE Computer and Communications Societies (INFOCOM '02), June 2002, New York, NY, USA 2: 590-598.
Kurose J, Ross K: Computer Networking: A Top-Down Approach Featuring the Internet. Addison Wesley, New York, NY, USA; 2005.
Chandrasekhar V, Andrews JG, Gatherer A: Femtocell networks: a survey. IEEE Communications Magazine 2008, 46(9):59-67. CrossRef
Yeh S-P, Talwar S, Lee S-C, Kim H: WiMAX femtocells: a perspective on network architecture, capacity, and coverage. IEEE Communications Magazine 2008, 46(10):58-65. CrossRef
Verizon Inc http://www22.verizon.com
Ericsson's Femto Cell Solution http://www.ericsson.com
Vanu Inc http://www.vanu.com
Harada H: A study on a new wireless communications system based on cognitive radio technology. IEICE, Tokyo, Japan; 2005.
Akyildiz IF, Lee W-Y, Vuran MC, Mohanty S: A survey on spectrum management in cognitive radio networks. IEEE Communications Magazine 2008, 46(4):40-48. CrossRef
Mitola J III: Cognitive radio for flexible mobile multimedia communications. IEEE International Workshop on In Mobile Multimedia Communications (MOMUC '99), 1999 3-10.
Mitola J III: Software Radios: Wireless Architecture for the 21st Century. John Wiley & Sons, New York, NY, USA; 1999.
Mitola J III: Cognitive radio: an integrated agent architecture for software defined radio, Ph.D. thesis. Royal Institute of Technology, Stockholm, Sweden; 2000.
Mitola J III, Maguire GQ Jr.: Cognitive radio: making software radios more personal. IEEE Personal Communications 1999, 6(4):13-18. 10.1109/98.788210 CrossRef
Kolodzy P, et al.: Next generation communications: Kickoff meeting. Proceedings of the Defense Advanced Research Projects Agency (DARPA '01), October 2001
Sahai A, Hoven N, Tandra R: Some fundamental limits on cognitive radio. Proceedings of Allerton Conference, October 2004, Monticello, Minn, USA
Weiss TA, Jondral FK: Spectrum pooling: an innovative strategy for the enhancement of spectrum efficiency. IEEE Communications Magazine 2004, 42(3):S8-S14. CrossRef
Weiss TA, Hillenbrand J, Krohn A, Jondral FK: Efficient signaling of spectral resources in spectrum pooling systems. Proceedings of the 10th Symposium on Communications and Vehicular Technology (SCVT '03), Novenber 2003, Benelux
Brodersen RW, Wolisz A, Cabric D, Mishra SM, Willkomm D: Corvus: a cognitive radio approach for usage of virtual unlicensed spectrum. Berkeley Wireless Research Center (BWRC), Berkeley, Clif, USA; 2004.
Cabric D, Mishra SM, Willkomm D, Brodersen R, Wolisz A: A cognitive radio approach for usage of virtual unlicensed spectrum. Proceeding of the 14th IST Mobile and Wireless Communications Summit, June 2005, Dresden, Germany
IEEE Working Group on Wireless Regional Area Networks (WRANs) : IEEE 802 LAN/MAN standards committee 802.22 WG on WRANs. IEEE, New York, NY, USA; April 2008. http://www.ieee802.org/22
Jeong PJ, Yoo M: Resource-aware rendezvous algorithm for cognitive radio networks. Proceedings of the 9th International Conference on Advanced Communication Technology (ICACT '07), February 2007, Gangwon-do, South Korea 3: 1673-1678. CrossRef
FCC. ET Docket No. 03-108 : Facilitating Opportunities for Flexible and Efficient and Reliable Spectrum Use Employing Cognitive Radio Technologies. March 2005
Holland O, Attar A, Olaziregi N, Sattari N, Aghvami AH: A universal resource awareness channel for cognitive radio. Proceedings of IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '06), September 2006, Helsinki, Finland 1-5.
Krishnamurthy S, Thoppian M, Venkatesan S, Prakash R: Control channel based MAC-layer configuration, routing and situation awareness for cognitive radio networks. Proceedings of IEEE Military Communications Conference (MILCOM '05), October 2005, Atlantic City, NJ, USA 1: 455-460.
Ma L, Han X, Shen C-C: Dynamic open spectrum sharing MAC protocol for wireless ad hoc networks. Proceedings of the 1st IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks (DySPAN '05), November 2005, Baltimore, Md, USA 203-213.
Buddhikot MM, Kolody P, Miller S, Ryan K, Evans J: DIMSUMNet: new directions in wireless networking using coordinated dynamic spectrum access. Proceedings of the 6th IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks (WoWMoM '05), June 2005, Taormina, Italy 78-85. CrossRef
Raychaudhuri D, Jing X: A spectrum etiquette protocol for efficient coordination of radio devices in unlicensed bands. Proceedings of the 14th IEEE Personal, Indoor and Mobile Radio Communications (PIMRC '03), September 2003, Beijing, China 1: 172-176.
Hsu AC-C, Wei DSL, Kuo C-CJ: A cognitive MAC protocol using statistical channel allocation for wireless ad-hoc networks. Proceedings of IEEE Wireless Communications and Networking Conference (WCNC '07), March 2007, Kowloon, Hong Kong 105-110.
Mitola J III: Software radio architecture: a mathematical perspective. IEEE Journal on Selected Areas in Communications 1999, 17(4):514-538. 10.1109/49.761033 CrossRef
CRC SCARI-OPEN http://www.crc.ca
Haykin S: Communication Systems. 4th edition. John Wiely & Sons, New York, NY, USA; 2001.
Bharghavan V, Demers A, Shenker S, Zhang L: MACAW: a media access protocol for wireless LANs. Proceedings of the ACM Conference on Communications Architectures, Protocols and Applications (SIGCOMM '94), August 1994, London, UK 212-225. CrossRef
IEEE Std 802.11 : Wireless lAN medium access control (MAC) and physical layer (PHY) specifications. IEEE, New York, NY, USA; July 1997.
Singh S, Raghavendra CS: PAMAS: power aware multi-access protocol with signalling for ad hoc networks. Computer Communication Review 1998, 28(3):5-25. 10.1145/293927.293928 CrossRef
Schiller J: Mobile Communication. 2nd edition. Addison Wesley, New York, NY, USA; 2003.
IEEE Std 802.11 : Part 11: wireless lAN medium access control (MAC) and physical layer (PHY) specifications. IEEE, New York, NY, USA; 2007.
McGuiggan P: GPRS in Practice: A Companion to the Specification. John Willey & Sons, New York, NY, USA; 2004. CrossRef
IEEE Std 802.16-2004 : IEEE standard for local and metropolitan area networks—part 16: air interface for Fixed Broadband Wireless Access Systems. IEEE, New York, NY, USA; October 2004.
NCTUns 4.0 Network Simulator and Emulator http://nsl.csie.nctu.edu.tw/nctuns.html
- Scheduling Heterogeneous Wireless Systems for Efficient Spectrum Access
- Springer International Publishing
EURASIP Journal on Wireless Communications and Networking
Elektronische ISSN: 1687-1499
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