radio resource management for heterogeneous wireless access networks

... Wireless Communications and Networking Volume 2011, Article ID 921623, 15 pages doi:10.1155/2011/921623 Research Article Interference-Aware Radio Resource Management for Local Area Wireless Networks Pekka ... cited. Interference-aware multiple access is an enabler to cost-efficient and reliable high data-rate local area wireless access. In this paper, we propose an interference-aware radio resource management scheme ... for resource allocation in shared computer systems,” DEC Research Report TR-301, September 1984. [2] B. Radunovi ´ c and J. Y. L. Boudec, “Rate performance objec- tives of multihop wireless networks, ”...

Ngày tải lên: 21/06/2014, 05:20

... effectively improve radio resource utility and system performance of the whole network. Keywords: radio resource management, public femtocell networks, resource utility, system performance 1. Introduction With ... 16 3. Radio resource management schemes 3.1. Long-term resource management: spectrum allocation between macrocell and public femtocells Spectrum is one of the most important resources for wireless ... K = 12). 4.3. Fast resource management In addition to the simulation results of the medium- term resource management, we further evalua te the per- formance of fast resource management. We implement coordinated...

Ngày tải lên: 20/06/2014, 22:20

... Corporation EURASIP Journal on Wireless Communications and Networking Volume 2006, Article ID 70903, Pages 1–12 DOI 10.1155/WCN/2006/70903 Effective Radio Resource Management for Multimedia Broadcast/Multicast ... the key issues in multicast transmission is the management of radio resources. The main requirement is to make an efficient overall usage of the radio resources. This makes the use of a common channel ... power for 16-QAM strong and weak blocks of bits (SF = 32), k = 0.5. for VehA (actually the 90% coverage for weak bocks is not achievable for the later propagation channel with a single radio...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 24/08/2014, 10:50

... these profiles, a BS implements a RRA (radio resource agent), the difference being where the RRC (radio resource controller) is located. A RRA collects information on radio resources and supervises the ... users share radio resources. This sharing can be enabled through a simple mechanism where cell-edge users use radio resources first and the cell-interior users use the residual radio resources. This ... of PF scheduling. 8. Conclusion We have proposed a new RRM framework for wide- area wireless data networks that manages radio resources of cell-interior and cell-edge users separately. We believe that...

Ngày tải lên: 21/06/2014, 11:20

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Ngày tải lên: 22/06/2014, 22:20

... 5: Mean tree depth for Case C and Case D. performance and help us foresee how such performance would scale to larger networks. 6.1. System Configuration. The experimental platform was developed ... improve the performance of CSMA/CA. For instance, Sift is a medium access control which was introduced in [8]. It makes use of a fixed- size contention window and nonuniform probabilities for selecting ... observe the performance of the proposed protocol under different scenarios. For our performance study, we implemented the SA-MAC and 2C-WSN protocols using OMNeT++ and the project Castalia [15]. For comparison...

Ngày tải lên: 21/06/2014, 11:20

... in all -wireless networks, ” Wireless Networks, vol. 11, no. 1-2, pp. 177–188, 2005. [26] G. Jolly, M. C. Kuscáu, P. Kokate, and M. F. Younis, “A lowen- ergy key management protocol for wireless ... scheme for heterogeneous sensor networks, ” Ad Hoc Networks, vol. 5, no. 1, pp. 24–34, 2007. [28] F. Kausar, S. Hussain, L. T. Yang, and A. Masood, “Scalable and efficient key management for heterogeneous ... Qian, M. Guizani, and H H. Chen, “A framework for a distributed key management scheme in heterogeneous wireless sensor networks, ” IEEE Transactions on Wireless Communications, vol. 7, no. 2, pp....

Ngày tải lên: 21/06/2014, 11:20

... relay (mpr) extension for ad hoc networks, ” IETF Request for Comments: 5449, February. [9] B. Mans and N. Shrestha, “Performance evaluation of approx- imation algorithms for multipoint relay selection,” ... networks, ” Journal of Com- munications and Networks, vol. 11, no. 5, pp. 509–517, 2009. [20] S. Capkun, L. Buttyan, and J. P. Hubaux, “Self-organized public key management for mobile ad hoc networks, ” ... ad-hoc networks, ” Computer Communi- cations, vol. 30, no. 7, pp. 1498–1512, 2007. [23] R. Li, J. Li, P. Liu, and H H. Chen, “On-demand public- key management for mobile ad hoc networks, ” Wireless Communications...

Ngày tải lên: 21/06/2014, 11:20

... Introduction Cognitive radio networks are envisaged as the key technology to realize dynamic spectrum access (DSA). Such paradigm shift in wireless communications aims at solving the scarcity of radio spectrum ... I.F.Akyildiz,W Y.Lee,M.C.Vuran,andS.Mohanty,“NeXt generation/dynamic spectrum access/ cognitive radio wireless networks: a survey,” Computer Networks, vol. 50, no. 13, pp. 2127–2159, 2006. [3] S. S. C. (SSC), ... call admission control in cellular networks, ” Wireless Networks, vol. 3, no. 1, pp. 29–41, 1997. [11] A. Ghasemi and E. S. Sousa, “Spectrum sensing in cognitive radio networks: requirements, challenges...

Ngày tải lên: 21/06/2014, 17:20

... resource required to achieve  r th . Fortunately again there are several solutions available for different scenarios. For example, in [20]agenericprocedure,CLARA,waspresentedforcross- layer resource ... all users compete for resources according to the criteria that the Highest Quality Improvement the Highest Possibility Resources (HQIHPR) [2]. Using KSBS, users compete for resources to make ... Ratios (PSNRs) in rate allocation for collaborative video transmissions [1]. Optimal resource allocation for multiuser wireless transmissions is studiedin[2] from an information theoretic perspective,...

Ngày tải lên: 21/06/2014, 22:20

... 0.80.85 0.90.95 Precision of sensors PD for 2-CV PF for 2-CV PD for CV-VT PF for CV-VT PD for CV-FT PF for CV-FT PD for WAS PF for WAS PD for Counting PF for Counting Figure 8: Numerical plots ... (majority rule) to perform reasonably well. However, WAS and the proposed q-CV fusion rule are independent of the link cost used for tree formation since they perform equally well for unbalanced trees. ... node. Computation of performance indices Here we show how the performance indices P i mn ,forany node S i , can be computed when the performance indices, p i mn of its observation and the performance indices...

Ngày tải lên: 21/06/2014, 23:20

... Introduction With the rapid growth of demands on wireless multimedia applications and wireless data services, it is expected that broadband wireless access (BWA) networks should be able to support high-speed, ... packet scheduling algorithms for wireless multimedia networks are required to concurrently achieve three performance objectives: QoS differentiation and guarantee, wireless bandwidth utilization ... difficult for traditional heuristic scheduling algorithms to handle the situation and guarantee satisfying performance in BWA networks. In this paper, we introduce learning-based approach for a better...

Ngày tải lên: 21/06/2014, 23:20

... regenerative decode-and-forward (RDF), nonregenerative decode-and-forward (NDF), amplify-and-forward (AF), and compress-and-forward (CF). For RDF and NDF we show that the problem can be formulated as a ... channel resource sharing parameter r. In addition to the desirable property in Proposition 1, for any given channel resource allocation and for any feasible R 2,tar , a closed-form solution for the ... have shown that for a given resource allocation, a closed-form solution for the optimal power allocation can be obtained. These results mean that we can determine the optimal value for r using a...

Ngày tải lên: 22/06/2014, 01:20

... both homogeneous and hetero- geneous sensor networks. For homogeneous networks, SR is fixed at 10 m. For heterogeneous networks, a sensor’s SR is uniformly chosen from three possible values: 5 ... coverage-preserving node scheduling scheme for large wireless sensor networks, ” in Pro- ceedings of the 1st ACM International Workshop on Wireless Sensor Networks and Applications (WSNA ’02), pp. ... on Wireless Sensor Networks and Applications (WSNA ’03), pp. 115–121, San Diego, Calif, USA, September 2003. [6] T. Yan, T. He, and J. A. Stankovic, “Differentiated surveil- lance for sensor networks, ”...

Ngày tải lên: 22/06/2014, 19:20

... pages doi:10.1155/2008/457307 Research Article Code Design for Multihop Wireless Relay Networks Fr ´ ed ´ erique Oggier and Babak Hassibi Department of Electr ical Engineering, California Institute of Technology, Pasadena ... multiple -access communication,” to appear in IEEE Transactions on Informa- tion Theory. [8] Y. Jing and H. Jafarkhani, “CTH17-1: using orthogonal and quasi-orthogonal designs in wireless relay networks, ” ... on Information Theory (ISIT ’06),pp. 542–546, Seattle, Wash, USA, September 2006. [10] F. Oggier and B. Hassibi, “An algebraic family of distributed space-time codes for wireless relay networks, ”...

Ngày tải lên: 22/06/2014, 19:20

... committee for major wireless communication conferences. His research inter- ests are in the area of radio resource management techniques and MAC and signaling layer protocols for high-speed wireless- access networks ... communication, mobile networks, and system per- formance analysis; and in particular QoS-aware radio resource management, joint study of wireless physical/link layer character- istics, cross-layer resource ... ra- dio resources. With the required support for multimedia ser- vices to multiple users over diverse wireless networks and the ever-increasing demand for high-quality wireless services, the need for...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 22/06/2014, 22:20

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