| 21. |
- Norin, Anna, 1977-, et al.
(författare)
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Intelligent Air Transportation - A Resource Management Perspective
- 2007
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Ingår i: 14th world congress on intelligent transport systems,2007. - Beijing : Ministry of communications.
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Konferensbidrag (refereegranskat)abstract
- In this paper we look at the air transportation system from a resource management perspective. In particular, we introduce the concept airport logistics, with the general focus of efficiently managing all the logistic activities and processes at, or nearby, an airport. One important goal is to utilize and process the available information for intelligent resource management. Some previous research in the air transportation system area is reviewed and classified into three categories; airline operations, airport operations and air traffic management. A conceptual framework of a decision support system is presented and motivated with a clear emphasis on the airport system.
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| 22. |
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| 23. |
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| 24. |
- Siomina, Iana, 1977-, et al.
(författare)
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An effective optimization algorithm for configuring radio base station antennas in UMTS networks
- 2006
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Ingår i: The 64th IEEE Vehicular Technology Conference 2006 Fall VTC2006-fall,2006. - : IEEE.
-
Konferensbidrag (refereegranskat)abstract
- In this paper we propose an effective algorithm for configuring radio base station antennas in UMTS networks and optimizing the Primary Common Pilot Channel (CPICH) transmit power. The algorithm is based on tabu search and utilizes the advantage of a problem size reduction technique which allows us to detect the most critical parts of the service area where the coverage loss probability is very sensitive to the choice of antenna configuration in neighboring cells. We report numerical results for a test network originating from a realistic planning scenario for the city of Lisbon.
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| 25. |
- Siomina, Iana, 1977-, et al.
(författare)
-
Automated optimization of service coverage and base station antenna configuration in UMTS networks
- 2006
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Ingår i: IEEE wireless communications. - 1536-1284 .- 1558-0687. ; 13:6, s. 16-25
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Tidskriftsartikel (refereegranskat)abstract
- Deployment and maintenance of UMTS networks involve optimizing a number of network configuration parameters in order to meet various service and performance requirements. In this article we address automated optimization of service coverage and radio base station antenna configuration. We consider three key configuration parameters: transmit power of the common pilot channel (CPICH), antenna tilt, and antenna azimuth. CPICH power greatly influences coverage. From a resource management point of view, satisfying the coverage requirement using minimum CPICH power offers several performance advantages. In particular, less CPICH power leads to less interference and higher system capacity. Optimal CPICH power, in its turn, is highly dependent on how the other two parameters, tilt and azimuth, are configured at radio base station antennas. Optimizing antenna tilt and azimuth network-wise, with the objective of minimizing the CPICH power consumption, is a challenging task. The solution approach in this article adopts automated optimization. Our optimization engine is a simulated annealing algorithm. Staring from an initial configuration, the algorithm searches effectively in the solution space of possible configurations in order to find improvements. The algorithm is computationally efficient, thus, we can optimize large networks without using excessive computing resources. We present a case study for a UMTS planning scenario in Lisbon. For this network, automated optimization saves up to 70 percent of the CPICH power used in the reference network configuration. In addition, the optimized network configuration offers significant performance improvement in terms of fewer overloaded cells and lower downlink load factor. © 2006 IEEE.
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| 26. |
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| 27. |
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| 28. |
- Yuan, Di, 1970-, et al.
(författare)
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Resource allocation of spatial time division multiple access in multi-hop radio networks
- 2005. - 1
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Ingår i: Resource Management in Wireless Networking. - New York : Springer. - 0387238077 - 9780387238081 ; , s. -695
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- This is the first book that provides readers with a deep technical overview of recent advances in resource management for wireless networks at different layers of the protocol stack. The subject is explored in various wireless networks, such as ad-hoc wireless networks, 3G/4G cellular, IEEE 802.11, and Bluetooth personal area networks.Survey chapters give an excellent introduction to key topics in resource management for wireless networks, while experts will be satisfied by the technical depth of the knowledge imparted in chapters exploring hot research topics.The subject area discussed in this book is very relevant today, considering the recent remarkable growth of wireless networking and the convergence of wireless personal communications, Internet technologies and real-time multimedia.This volume is a very good companion for practitioners working on implementing solutions for multimedia and Quality of Service – sensitive applications over wireless networks.
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