Weitere Artikel dieser Ausgabe durch Wischen aufrufen
We investigate the benefits of two-hop opportunistic relay in time division duplex (TDD) OFDMA cellular network configurations. The paper starts with a short analytical model for the two-hop opportunistic relay. The model expresses the probability of finding a suitable relay node in the presence of lognormal fading and it allows the computation of the expected number of out-of-coverage nodes, as well as the end-to-end spectrum efficiency increase due to opportunistic relaying. The paper then presents results for Monte Carlo simulations of opportunistic relay in some realistic scenarios. Specifically, the simulations consider two scenarios. The first scenario uses the propagation model and a wide-area 19-cell configuration specified in 802.16 OFDMA cellular standard evaluation methodologies. In the second scenario, a Manhattan-like 19-cell topology is used. Our simulations show 11% to 33% in throughput increase when the opportunistic relay technology is used. Our results evaluate the benefits of the opportunistic relay in both scenarios in terms of coverage extension and throughput increase.
3rd generation partnership project; technical specification group radio access network; opportunity driven multiple access(3g tr 25.924 version 1.0.0) December 1999, http://www.3gpp.org/
Aggélou GN, Tafazolli R: On the relaying capability of next-generation GSM cellular networks. IEEE Personal Communications 2001, 8(1):40-47. 10.1109/98.904898 CrossRef
IEEE standard for local and metropolitan area networks part 16: air interface for fixed broadband wireless access systems 2004, http://www.wirelessman.org
Draft standard for local and metropolitan area networks—part 16: air interface for fixed and mobile broadband wireless access systems-multihop relay specification 2004, http://www.wirelessman.org
Lin P, Lai W-R, Gan C-H: Modeling opportunity driven multiple access in UMTS. IEEE Transactions on Wireless Communications 2004, 3(5):1669-1677. 10.1109/TWC.2004.833446 CrossRef
Rouse T, McLaughlin S, Haas H: Coverage-capacity analysis of opportunity driven multiple access (ODMA) in UTRA TDD. Proceedings of 2nd International Conference on 3G Mobile Communication Technologies (3G '01), 2001 252-256. CrossRef
Muller C, Klein A, Wegner F: Coverage extensionof wimax using multihop in low user density environment. Proceedings of the 11th International OFDM Workshop, Hamburg, Germany, August 2006
Visotsky E, Bae J, Peterson R, Berryl R, Honig M: Net 22-3: on the uplink capacity of an 802.16j system. Proceedings of IEEE Wireless Communications and Networking Conference (WCNC '08), April 2008 2657-2662.
Cho J, Haas ZJ: Throughput enhancement by multi-hop relaying in cellular radio networks with non-uniform traffic distribution. Proceedings of the 58th IEEE Vehicular Technology Conference (VTC '03), October 2003, Jeju, South Korea 3065-3069.
Lin Y-D, Hsu Y-C: Multihop cellular: a new architecture for wireless communications. Proceedings of the 19th Annual Joint Conference of the IEEE Computer and Communications Societies (INFOCOM '00), March 2000, Tel Aviv, Israel 3: 1273-1282.
Gruber I, Bandouch G, Li H: Ad hoc routing for cellular coverage extension. Proceedings of the 57th IEEE Vehicular Technology Conference (VTC '03), April 2003, Jeju, South Korea 57: 1816-1820.
Wu H, Qiao C, De S, Tonguz O: Integrated cellular and ad hoc relaying systems: iCAR. IEEE Journal on Selected Areas in Communications 2001, 19(10):2105-2115. 10.1109/49.957326 CrossRef
Luo H, Meng X, Ramjee R, Sinha P, Li L: The design and evaluation of unified cellular and ad hoc networks. IEEE Transactions on Mobile Computing 2007, 6(9):1060-1074. CrossRef
Wu J, Jaseemuddin M, Esmailpour A: Integrating UMTS and mobile ad hoc networks. Proceedings of the IEEE International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob '06), June 2006 196-204.
Liu B, Liu Z, Towsley D: On the capacity of hybrid wireless networks. Proceedings of the 22nd Annual Joint Conference of the IEEE Computer and Communications Societies (INFOCOM '03), April 2003, San Francisco, Calif, USA 2: 1543-1552.
Law LK, Krishnatnurthy SV, Faloutsos M: Capacity of hybrid cellular-ad hoc data networks. Proceedings of the 27th Annual Joint Conference of the IEEE Computer and Communications Societies (INFOCOM '08), 2008, Phoenix, Ariz, USA 1606-1614.
Calcev G, Bonta J: Opportunistic two-hop relays for OFDMA cellular networks. Proceedings of the IEEE Globecom Workshops (GLOBECOM '08), December 2008 1-6.
Gudmundson M: Correlation model for shadow fading in mobile radio systems. Electronics Letters 1991, 27(23):2145-2146. 10.1049/el:19911328 CrossRef
Project 802.16m evaluation methology document IEEE Unapproved Draft Std P802.16m, March 2008, http://www.wirelessman.org/
- OFDMA Cellular Networks with Opportunistic Two-Hop Relays
- Springer International Publishing
- EURASIP Journal on Wireless Communications and Networking
Elektronische ISSN: 1687-1499
Neuer Inhalt/© ITandMEDIA, Product Lifecycle Management/© Eisenhans | vege | Fotolia