ip addressing in computer networks ppt

... SS (uplink traffic) and in the BS (downlink and uplink traffic). However, in this study, it is being addressed the scheduling packets for the uplink traffic in the BS. The uplink scheduling is ... environments, minimizing the average delay according to the MCSs used in the PHY. This algorithm also interacts with the polling mechanism, adapting the polling interval, and guaranteeing the mini- mal bandwidth ... scheduling mech anisms. The scheduling algorithm proposed in this study differs from these previous studies mainly because it interacts with the polling mechanisms aiming at adjusting the interval

Ngày tải lên: 20/06/2014, 22:20

... Analytical modeling of TCP clients in Wi-Fi hot spot networks, in Proceedings of IFIP Networking (2004) 36 S Choi, K Park,... 802.11: Separating collision from weak signal, in IEEE INFOCOM 2008 ... unfairness by reducing the chances of transmission for the sending stations in the way of increasing the minimum conten- tion window size. The downlink compensation access (DCA) algorithm in [16] gives ... services, intelligent traffic alerts, tracking, pinpointing child’s location, and local map pro- visioning have been dealt with much attention in the community [2-4]. Noticeable point is that

Ngày tải lên: 21/06/2014, 00:20

... sort of combining al- gorithm. In this study two different combining procedures are considered, namely, selective combining (SC) and maxi- mal ratio combining (MRC). 4.1. Selective combining Figure ... A, 3 km/h selective combining and increasing the number of received radio links provides reduction in the transmitted power in- dependently of the combining technique. In Figure 8, for the reference ... [...]... currently working for his Ph.D degree in electrical engineering in Instituto Superior T´ cnico His research e interests include wideband CDMA systems, OFDM, channel coding, channel estimation,

Ngày tải lên: 22/06/2014, 22:20

... MINIMIZING QUEUEING DELAYS IN COMPUTER NETWORKS NGIN HOON TONG (B.Eng(Hons.), NUS) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING ... First-Out Generalized Minimum Queueing Delay Generalized Processor Sharing Internet Engineering Task Force Integrated Services JoBS Joint Buffer Management and Scheduling LIRA Location Independent Resource ... service classes traversing a single link The GMQD is a model that minimizes the total queueing delay of all backlogged service classes traversing a single link Depending on... applications

Ngày tải lên: 17/09/2015, 17:20

... central coordinating role in facilitating information sharing, with other actors remaining on the periphery However, that analysis also shows the important role other actors play in relaying information ... actors within the network, indicating that its reach beyond primary points of contact is relatively low Other influential actors, as indicated by high information sending and receiving means and ... Quarantine Services and Technical Services have very high means for both information sending and receiving, and high levels of closeness and betweenness, indicating influential roles in information

Ngày tải lên: 21/02/2014, 01:20

... accuracy and integrity of this document Date: 2005.03.13 22:26:27 +08'00' QOS IN PACKET NETWORKS THE KLUWER INTERNATIONAL SERIES IN ENGINEERING AND COMPUTER SCIENCE QOS IN PACKET NETWORKS by Kun ... MITRE Corporation USA Springer eBook ISBN: Print ISBN: 0-387-23390-3 0-387-23389-X ©2005 Springer Science + Business Media, Inc Print ©2005 Springer Science + Business Media, Inc Boston All rights ... of Queue ILM 222-224 Incoming Label Map See ILM Integrated Services See IntServ Inter-arrival time 47-48, 113 Interleaving 71-74, 80, 82-83 Internet Service Provider See ISP IntServ 6, 105, 159,

Ngày tải lên: 01/06/2014, 12:38

... For information about publishing your research in Advances in Difference Equations go to http://www.advancesindifferenceequations.com/authors/instructions/ For information about other SpringerOpen ... (dij (n)) =  0.1 sin(0.2πn) 0 0 0.01 sin(0.2πn)   7 + sin(0.2πn) 0.1 sin(0.2πn) 0.01 sin(0.2πn)  0 B(n) = (bij (n)) =  0.1 cos(0.2πn) 7 + sin(0.2πn) 0.01 sin(0.2πn) 0 7 + sin(0.2πn)... be relaxed ... in continuous-time and discrete-time delayed bidirectional neural networks Physica D 159,... Multiperiodicity of discrete-time delayed neural networks evoked by periodic external inputs

Ngày tải lên: 20/06/2014, 20:20

... that increasing the frequency diversity in the source-to -relay channel results in a more pronounced coding gain than increasing the frequency diversity in the relay- to-destination ... methods In examining the power gain of best relay selection over the other two relaying strategies, we note an interesting trend When the fading channels contain L = 2 taps, the power gain of ... Hermitian, Weyl’s Inequality [29, Theorem 4.3.1] gives λ eff,min ≥ λ sd,min + λ r m d,min . (42) Since l sd,min >0and λ r m d,min > 0 again due to [28, Lemma IV.1], we have l eff,min >0andthus

Ngày tải lên: 20/06/2014, 22:20

... issues to obtain high throughput, as follows: BCO maintains all free slots as a continuous area by constructing each burst in the corner of the available bandwidth area for minimizing external ... construction problem as a variant of the bin packing problem So -In et al [10] designed the enhanced onecolumn striping with non-increasing area first mapping algorithm (eOCSA), which constructs each ... slots are within a continuous area A corner is the intersection of the horizontal edge and left-hand vertical edge of the free bandwidth area To minimize internal fragmentation, BCO shrinks the area

Ngày tải lên: 20/06/2014, 22:20

... Multi-channel Mac for Ad Hoc Networks: Handling Multichannel Hidden Terminals Using a Single Transceiver, in 5th ACM International Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc ‘04, 222–233 ... Kim, H Shin, H Cha, Y-MAC: An Energy-Efficient Multi-channel MAC Protocol for Dense Wireless Sensor Networks, in International Conference on Information Processing in Sensor Networks, IPSN ‘08, ... probabilities are derived in Appendix B The amount of successful data negotiations during an ATIM window is on average E[packets] = Ps ga Tatim (18) In the beginning of each ATIM window all the channels

Ngày tải lên: 20/06/2014, 22:20

... be explained by exam- ining the particular distribution involved, for one sin- gle as well as for multiple interfering cells. A typical cdf of the interference gain (single or multiple inter- ... seen in Section III-B.1). 1) Preliminaries: We begin this section by examining two important points. When taking into account multipath fading as well as shadowing as the fading effects in the ... in Sec- tion IV-B, we obtain the histogram of the interference gain G n (one single interferer) by applying the non-uni - form partitioning generalized inverse method described in III-B.2. Finally,

Ngày tải lên: 21/06/2014, 00:20

... · W d i / 2 in Equation 4. In Figure 8, win- dow-size delegation i ncreases an incre asing slope of W ci (x)inanintervaloflinearto(1+a)-fold from W i (x). If we want to control window-size delegation ... relationship between throughput a nd window size without window-size delegation. Ideally, in the steady state, the congestion window size of STA i W i (t) changes as the dashed line does in Figure 8. In ... cooperation methods in wireless networks including [11] and [12] were discussed only in the link or/and physical... Shenker, Integrated Services in the Internet Architecture: An Overview,

Ngày tải lên: 21/06/2014, 01:20

... Using theorem proving techni- ques, for example, will allow inferring theorems describ- ing the root cause of the incident and steps involved in the attacks. Investigating Attacks in Wireless Networks ... and point of access. Using a formal model of digital investigation in wireless networks should integrate such mobility-based information when modeling actions in the attack scenario. K eeping track, ... wireline networks where intermediate routers are in most cases supposed to be trusted, usually all nodes in the networks can participate in forwarding datagrams from the source to the destination

Ngày tải lên: 21/06/2014, 02:20

... possibility to provide interworking between the two different networks In the literature, Frattasi et al [23] proposed an architecture for the interworking of WiMAX and HiperLAN, where HiperLAN is a European ... been increasingly integrated into devices and peripherals Because WiMAX may use 2−11 GHz where the spectrum overlaps with that of the existing IEEE 802.11 WLANs, the coexistence of both of the networks ... main scenario in this collaborative effort between the two networks is the use of the IEEE 802.16 networks for the wireless backhaul connecting the Internet to a number of local IEEE 802.11 networks

Ngày tải lên: 21/06/2014, 11:20

... imization in multi-hop wireless networks in the presence of self interference,” in Proceedings of the 8th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks ... an initial SINR guess γ containing entries with nearly zero values. A standard way to deal with the self-interference problem consists of adding a supplementary combinatorial constraint in the ... for incrementally increasing values of the self-interference coefficient. It alternates between twosteps:increasingthevalueofavirtualself-interference coefficient g v (note that this increasing is

Ngày tải lên: 21/06/2014, 11:20

... given as SFi = SFi,time × SFi,freq Increasing time domain spreading reduces intrauser multicode interference, whereas increasing frequency domain spreading increases frequency diversity Thus ... the same time domain code is low. However, when the number of users using the same time domain code increases, intercode interference increases. In order to reduce the intercode interference, users ... line 1 On lines 2 to 18, the time domain and frequency domain codes are determined On lines 2 and 3, an initial assignment of time domain code is made... example of code assignment in

Ngày tải lên: 21/06/2014, 11:20

... implementation 4.4 Training Algorithm The classification process basically consists of two phases: training phase and testing phase A training set is used in supervised training to present the proper ... allows speeding its learning process and reducing its size Among several possible features selection algorithms, we will investigate principal component analysis (PCA) and linear discriminate analysis ... that certain value A minimum SNR for which the FRP is less than 1%, SNRmin has been considered in these results Accordingly, the SNRmin for inter-class recognition (Case I) is dB, for inter-class

Ngày tải lên: 21/06/2014, 16:20

... important original data segment c 0 in the system, we can simply drop the combined data segments containing c 0 . Intuitively, c 0 is included in the combined data segments 4 EURASIP Journal on ... Therefore, many existing schemes have focused on achieving a full cardinality in data combination. For example, the proposals in [11, 12, 15, 24] generally increase the cardinality by combining as much ... distributed data in large-scale sensor networks through decentralized erasure codes,” in Proceedings of the 4th International Symposium on Information Processing in Sensor Networks (IPSN ’05), pp.

Ngày tải lên: 21/06/2014, 17:20

... respect to that obtained in the following. A pictorial description of the proposed scenario is given in Figure 1(c).Inparticular,we investigate the performance when the communication links between the ... in Proceedings of the 2nd International Workshop on Information Processing in Sensor Networks, pp 80–95, Palo Alto, Calif, USA, April 2003 [8] R Nowak, U Mitra, and R Willett, “Estimating ... filtering,” in Proceedings of the International Conference on Image Processing (ICIP ’04), vol 1, pp 251–254, Singapore, October 2004 ` [18] G Ferrari, M Martalo, and M Sarti, Sensor networks

Ngày tải lên: 21/06/2014, 17:20

... privacy-enhancing technologies. Information networks serve as the context in which privacy is investigated. Within information networks, the concepts of information ecosystems and con- tamination are introduced. ... different online registers or databases con- taining personal information may be combined by powerful search engines in order to get an apprehension about groups of individuals. In effect, this informa- tion ... and several startups joined in creat- ing Internet products and services. By the beginning of 2000, the Internet was supporting a great number of popular applications, including typical killer appli- cations...

Ngày tải lên: 16/01/2014, 16:33