quality of service models for ad hoc wireless networks

... Madsen, F H P Fitzek, and R Prasad, “Impact of different mobility models on connectivity probability of a wireless ad hoc network,” in Proceedings of the International Workshop on Wireless Ad- Hoc ... pp 173–219, Addison-Wesley, Reading, Mass, USA, 2001 [2] D B Johnson, D A Maltz, and J Broch, “DSR: the dynamic source routing protocol for multi-hop wireless ad hoc networks, ” in Ad Hoc Networking, ... Ad- Hoc Networks, pp 120–124, June 2004 [5] F Bai, N Sadagopan, and A Helmy, “Important: a framework to systematically analyze the impact of mobility on performance of routing protocols for adhoc networks, ”...

Ngày tải lên: 21/06/2014, 11:20

... in wireless internet and mobile ad hoc networks; algorithms, complexity, power connectivity and coverage in wireless sensor networks; adaptation, design and implementation of dynamic models for ... is, dynamic source routing and ad hoc on-demand distance vector routing Their findings are expected to lead to further performance improvements of various ad hoc networks in the future The sixth ... an Editor for EURASIP Journal on Wireless Communications and Networking, for International Journal of Computer and Their Applications, for International Journal of Sensor Networks, and for International...

Ngày tải lên: 22/06/2014, 22:20

... 1.1 Ad hoc networking 1.2 The ad hoc wireless network: operating principles 1.3 Ad hoc networks: vulnerabilities 1.4 Ad hoc networks: security requirements 1.5 Quality of service 1.6 Further reading ... blank SECURITY AND QUALITY OF SERVICE IN AD HOC WIRELESS NETWORKS Ensuring secure transmission and good quality of service (QoS) are key commercial concerns in ad hoc wireless networks as their ... nature of ad hoc networks, a set of security requirements is subsequently presented The chapter also introduces the quality of service issues that are relevant for ad hoc networks 1.1 Ad hoc networking...

Ngày tải lên: 25/03/2014, 12:07

... techniques in ad hoc wireless networks — part I Routing techniques in ad hoc wireless networks — part II Applications of ad hoc wireless networks Power management in ad hoc wireless networks Connection ... 27 An Integrated Platform for Quality- of- Service Support in Mobile Multimedia Clustered Ad Hoc Networks George N Aggélou 28 Quality of Service Models for Ad Hoc Wireless Networks Xiao Hannan, ... y of Service in Mobile Ad Hoc Networks Sat yabrata Chakrabarti and Amitabh Mishra Power-Conservative Designs in Ad Hoc Wireless Networks Yu-Chee Tseng and Ting-Yu Lin Performance Analysis of Wireless...

Ngày tải lên: 03/06/2014, 01:08

... transmit, leading to even lower efficiency Hence, the exponential backoff of IEEE 802.11 is unsuitable for such ad hoc forwarding of packets, which is also shown in [36] Lastly, the fading channel leads ... capacity of wireless networks, ” IEEE Transactions on Information Theory, vol 46, no 2, pp 388–404, 2000 [2] M Grossglauser and D N C Tse, “Mobility increases the capacity of ad hoc wireless networks, ” ... We assume the same P for all nodes Throughput performance of the aforementioned models for Channel MAC is presented in Figure The results are shown for a different numbers of node pairs (n = and...

Ngày tải lên: 21/06/2014, 22:20

... directly applied to non-homogenous networks In this paper, we study the problem of QoS topology control for non-homogenous ad hoc wireless networks Given a set of wireless nodes in a plane where ... “Algorithmic aspects of topology control problems for ad hoc networks, ” in Proceedings of the 3rd ACM International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc ’02), pp 123–134, ... Krunz, “CDMA-based MAC protocol for wireless ad hoc networks, ” in Proceedings of the 4th ACM Interational Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc ’03), pp 153–164, Annapolis,...

Ngày tải lên: 22/06/2014, 22:20

... route discoveries, which is the most critical part of ad hoc wireless sensor networks EARP is well suited for sensor networks due to its ability to adapt to the environment and make routing decisions ... University of California, Los Angeles, Calif, USA, 1999 [16] C E Perkins, E M Royer, S R Das, and M K Marina, “Performance comparison of two on-demand routing protocols for ad hoc networks, ” ... Rappaport, Wireless Communications, Principles and Practice, Prentice-Hall, Upper Saddle River, NJ, USA, 1996 [13] A B McDonald and T Znati, “A path availability model for wireless ad- hoc networks, ”...

Ngày tải lên: 23/06/2014, 00:20

... without waiting for the feedback information of its header, i.e., one-way reservation is adopted for each burst To guarantee the completion of the processing of its header before the burst arrives ... out -of- band signalling protocol is adopted, i.e., headers of bursts are transmitted on a dedicated control wavelength channel This way, the extraction of headers is avoided In addition, headers ... backbone networks 1.3 Quality Of Service In OBS Networks Quality of service (QoS) in OBS networks is mainly evaluated on the burst loss probability due to the buerless nature of OBS Although FDLs can...

Ngày tải lên: 11/09/2015, 16:05

... Member of the academic staff of the Department of Electrical and Computer Engineering of the University of Patras and holds the position of Associate Professor Since 2004, he has been the Director of ... Prabhakaran, “A survey of quality of service in IEEE 802.11 networks, ” IEEE Wireless Communications, vol 11, no 4, pp 6–14, 2004 [13] J Deng and R.-S Chang, “A priority scheme for IEEE 802.11 DCF ... Enhancements for Quality of Service (QoS), D4.4, IEEE Draft Std 802.11e, 2003 [7] F Cali, M Conti, and E Gregori, “IEEE 802.11 protocol: design and performance evaluation of an adaptive backoff...

Ngày tải lên: 22/06/2014, 22:20

... discussions of the results HIGH-SPEED FIBER-BASED WIRELESS NETWORKS 2.1 Advantages of high-speed fiber-based wireless systems As stated above, while the wireless part (subsystem) of the hybrid ... above-mentioned advantages lead to a better QoS in an ad hoc network where dynamic reconfiguration of a wireless network without the need of a centralized control is possible This network is crucial for communications ... and limits the system performance [3, 4] In particular, the use of ad hoc wireless networks, used as an extension to an existing infrastructure, may amplify the difficulty of chromatic dispersion...

Ngày tải lên: 22/06/2014, 22:20

... of HH H The probability density of ξi is fξ (ξ) = 4ξe−2ξ for ξ > and zero elsewhere Proof It is sufficient to give the proof for one eigenvalue, say λ5 The proof for the remaining eigenvalues proceeds ... approximation becomes exact for the case of ZF receiver where µ → 0, that is, the limit for γ → of (35) is 3/2 3.2.2 True diversity The second interpretation of (29) leads to a refined diversity ... maintains 2 its form and therefore, complexity of ML or a linear receiver remains identical to the one antenna case Only the matched filtering needs to be performed additionally for as many receive...

Ngày tải lên: 23/06/2014, 01:20

... “Specification of guaranteed quality of service, ” IETF RFC 2212, September 1997 [17] S Verma, R K Pankaj, and A Leon-Garcia, “Call admission and resource reservation for guaranteed QoS services in ... supported by the Ministry of Information & Communication of the Republic of Korea REFERENCES [1] ISO/IEC 13818 (MPEG-2), “Generic coding of moving pictures and associated audio information,” November ... Effective Quality- of- Service Renegotiating Schemes for Streaming Video [6] Z.-L Zhang, J Kurose, J D Salehi, and D Towsley, “Smoothing, statistical multiplexing, and call admission control for stored...

Ngày tải lên: 23/06/2014, 01:20

... throughput reflects the Quality of Service from the viewpoints of the application and user The focus of the thesis is on the influence of the network on the applicationperceived Quality of Service and thus ... wireless networks for different mobile services, since the influence of the network on the application-perceived Quality of Service is of great significance when it comes to customer satisfaction Therefore, ... UE Uu BS Iub RNC Iu CN End-to-End Service UMTS Bearer Service Radio Access Bearer Service Radio Bearer Service UTRA Service Iu Bearer Service Physical Bearer Service Figure 2.6: UTRAN architecture...

Ngày tải lên: 18/10/2013, 12:15

... Except for English, the best results on the userspecific test sets are produced by the adaptation of the web mixture models The benefit of using message adaptation instead of simple unigram adaptation ... 17.0 for English, 18.7 for Spanish, and 22.5 for French For English, we also created web mixture models with KN smoothing The error rates were 16.5, 15.9 and 15.7 for the 20 MB, 40 MB and 70 MB models, ... size of the model Since it is possible to create larger mixture models than in-domain models, there are no in-domain results for the largest model sizes Especially if large models can be afforded,...

Ngày tải lên: 22/02/2014, 02:20

... the added bigrams will affect the calculation of "importance" of bigrams to be added Generally, adding more bigrams at one time will lead to more negative impacts Thus, it is expected that models ... over the saturated model of "Step-2K", we obtain combined models containing from 100K to million bigrams The performance of the combined models and that of the baseline KLD models are illustrated ... F-Measure of 96.33%, number of bigrams decreases by up to 90% In addition, by combining the discriminative pruning method with the baseline method, we obtain models that achieve better performance for...

Ngày tải lên: 17/03/2014, 04:20

... {topic→information} index requires identification of the topic for each call to make use of information available in the model Below we show examples of the use of the model for topic identification Topic Identification ... not ready with details like printer name, ip address of the printer, resulting in long hold time whereas for cluster-2, which is about online courses, users Application of Domain Model Information ... 2002), word-error rates are in the range of 78% for read speech whereas for telephonic speech it is more than 30% This degradation is due to the spontaneity of speech as well as the telephone channel...

Ngày tải lên: 31/03/2014, 01:20

... degraded the performance of the classifier Ivl P (w t ci; 0) Nit 11 Nit! 1— r P(di ci; ) = t=1 (7) The parameters O = P(w t Ici; 0) of the mixture component cj can be estimated as the fraction of ... number of times word w t occurs in class e j , the total number of word occurrences in ej, and the total number of occurrences of w t , respectively Let d(c) = P(ci ld i ) denote the number of documents ... multi-variate model Mladenia and Grobelnik (1999) used a multinomial model in a different context In this paper we present results of experiments in which we evaluated the performance of a Naive Bayes...

Ngày tải lên: 31/03/2014, 20:20

... BPH-QoL: A Quality of Life Scale for patients with BPH; WHOQoL-100: the WHO Quality of Life Competing interests The compliance of subjects is a very important indicator of the effectiveness of a scale, ... Statistics; 2003, Additional file Factor loadings of the short form of BPH-QLS The table showed the factor analysis of the short form of BPH-QLS Click here for file [http://www.biomedcentral.com/content/supplementary/14777525-7-24-S4.doc] ... domains of the short-form of BPH-QLS and SF-36 were significantly correlated (p < 0.01) with CCs of 0.267~0.773, most of which were > 0.300 The disease domain of the new scale and that of the...

Ngày tải lên: 18/06/2014, 19:20

... the basis for the development of an adult form (MMQL-UK (PF)) Methods Before wider administration of the MMQL-UK (PF) could take place, the phrasing of the questions from the child form had to be ... [19] The original version of the MMQL had three different forms, one for children aged 8–11 (Child form, MMQL-CF), one for 12–18 year olds (Youth Form, MMQL-YF) and one for young people aged 19–25 ... represent the lowest and highest scores for the individual components of each of the sub-scales Page of (page number not for citation purposes) Health and Quality of Life Outcomes 2008, 6:19 http://www.hqlo.com/content/6/1/19...

Ngày tải lên: 18/06/2014, 22:20

... Page of 12 Half of the summation of PCSA values for non-primary flexors was added to each of the two primary flexors while a third of the summation of PCSA values for nonprimary extensors was added ... accuracy for same session models Table compares NRMSE and R2 for two extreme a cases where 25% and 90% of the data set is used for training models and the rest of the data set is used for testing ... estimation of thumb-tip forces under four different configurations In another study, performance of a Hillbased physiological muscle model was compared to a neural network for estimation of forearm...

Ngày tải lên: 19/06/2014, 08:20