mobility models for mulithop wireless networks

... group -mobility users Figure gives an example of group -mobility users traveling onboard a train The real-time traffic performance of groupmobility users is usually lower than that of individual mobility ... teletraffic performance (for more details, refer to Section 3.2) In the case of a batch of users arriving at a new cell, for example, during a handover event involving the mobile platform, there ... that we take group -mobility users into account is to examine worst-case performance for admission control planning, whereas a great number of previous studies overestimated the performance by simplifying...

Ngày tải lên: 22/06/2014, 22:20

... bounds obtained for the MBRC, that is, for hybrid wireless networks where the source node has access to distinct bands (standards) and a second node that overhears the source information relays ... construction of a hybrid wireless network, we examine a scenario where new wireless links can be added to the classical frequency division relay network to form a simple hybrid wireless network Given ... ⎫ ηi +χi ⎬ φi log 1+αi φi ⎭ i=1 We omit the proof for Theorem since the derivation for each mutual information follows directly from [15] For each broadcast channel, if the relay node sees a...

Ngày tải lên: 21/06/2014, 18:20

... “Robust statistical methods for securing wireless localization in sensor networks, ” in Proceedings of the 4th International Symposium on Information Processing in Sensor Networks, pp 91–98, April ... Krishnamurthy, Principles of Wireless Networks: A Unified Approach, Prentice Hall, Upper Saddle River, NJ, USA, 2002 [2] F Gustafsson and F Gunnarsson, “Mobile positioning using wireless networks, ” IEEE Signal ... and G Borriello, “Location systems for ubiquitous computing,” IEEE Computer, vol 34, no 8, pp 57–66, 2001 [16] K Pahlavan and A H Levesque, Wireless Information Networks, John Wiley & Sons, New...

Ngày tải lên: 21/06/2014, 18:20

... and univariate finite field models for genetic networks and show that they are equivalent Each of the models can be converted to the other by a discrete Fourier transform Section is devoted to ... Bioinformatics and Systems Biology The use of polynomial dynamical systems to model biological phenomena, in particular gene regulatory networks, have proved to be as valid as continuous models ... cycle has length l FINITE FIELD MODELS A finite dynamical system constitutes a very natural discrete model for regulatory processes (see [10]), in particular genetic networks Experimental data can...

Ngày tải lên: 22/06/2014, 19:20

... of 33.24 dB for the “Students” stream (i.e., around 6.5 dB better than the “No ER” performance), and 28.45 dB for the “Foreman” stream (i.e., around dB better than the “No ER” performance) The ... (e.g., 99 for quarter common intermediate format: QCIF), and mv j (n) is the motion vector (both in x and y directions) of the nth macroblock in the jth frame The NAI computations for the “Foreman” ... Students Figure 7: The intra-refresh rate computed for the “Foreman” and “Students” streams The results of the computation of this function for both the “Foreman” and “Students” streams are shown in...

Ngày tải lên: 22/06/2014, 20:20

... relay networks, ” IEEE Transactions on Wireless Communications, vol 5, no 6, pp 1433–1444, 2006 ¨ R U Nabar, O Oyman, H B¨ lcskei, and A J Paulraj, “Capaco ity scaling laws in MIMO wireless networks, ” ... for MIMO wireless networks, ” in Proceedings of IEEE International Conference on Communications (ICC ’05), vol 4, pp 2705–2711, Seoul, Korea, May 2005 T M Cover and J A Thomas, Elements of Information ... 4, and N = for K = and 8, respectively The figures show that the GN/QR-P-QR and the GN/AF schemes offer similar capacity for K = However, Figure shows that when K = 8, GN/QR-P-QR outperforms GN/AF...

Ngày tải lên: 22/06/2014, 22:20

... 12 dB for the MMSE coefficients computation Figure illustrates the BER performance of considered single-user detectors for configuration I with Nu = 8, whereas Figure represents performance for configuration ... methodology allows for algorithms and inter-component communications code generation, as well as for C generation and for VHDL generation The next part presents the used architecture for the MCCDMA ... in Figure 14 for the HW-SW implementation using quick ports Before implementation on the testbed platform, the last step of the design process is the generation of the codes both for the SW and...

Ngày tải lên: 23/06/2014, 01:20

... of base stations for cellular radio networks Wireless Networks, 6(4):421–428, 2000 R Mathar and M Schmeink Optimal base station positioning and channel assignment for 3G mobile networks by integer ... generation models for channel assignment in cellular networks Discrete Applied Mathematics, 118:299–322, 2002 M R Karim, M Sarraf, and V B Lawrence W-CDMA and CDMA2000 for 3G Mobile Networks McGraw ... search for the frequency assignment problem in cellular radio networks Technical report, LGI2P, EMA-EERIE, Parc Scientifique Georges Besse, Nimes, France, 1999 M Hata Empirical formula for propagation...

Ngày tải lên: 08/07/2014, 16:56

... by different kinds of wireless networks such as cellular networks, wireless local area networks (WLANs), wireless personal area networks (WPANs) and so on These wireless networks give users the ... model for distributed networks 1.4 System models for cooperative networks 2.1 System model for downlink cellular network in scenario (i) and (ii) 18 2.2 Models for ... control (MAC) techniques are essential for all types of wireless networks, many researchers and engineers are attracted to this field As wireless networks are formed by multiple terminals, cooperation...

Ngày tải lên: 09/09/2015, 09:59

... that results from network congestion Mobility Models Mobility models can be categorized into two categories: entity and group mobility models The entity mobility models represent the behavior of ... optimized Bypass-AODV for a wide range of mobility models including VANET models Simulation results show that Bypass-AODV is insensitive to random mobility models and has a clear performance improvement ... outperforms the AODV especially for uniformly distributed nodes and long TCP connections 5.3 Impact of Group Mobility Models on Bypass-AODV we explore the dependency of routing protocols performance...

Ngày tải lên: 21/06/2014, 11:20

... Radio Link Performance of Third Generation (3G) Technologies For Wireless Networks Gustavo Nader (Abstract) Third generation wireless mobile communication networks are characterized ... Three header formats are used: one for MCS-7, MCS-8 and 27 MCS-9 (MCS’s with four payload units), one for MCS-5 and MCS-6 and one for MCS-1 to MCS-4 The first and second formats are for 8PSK modulation, ... convolutional code for forward error correction (FEC) and a 40-bit FIRE code for BCS (optionally Forward Error Correction) CS-2 and CS-3 are punctured versions of the same FEC code as CS-1 For CS-1 the...

Ngày tải lên: 26/04/2013, 11:15

... Designing for Profitability in the Physical Layer of Wireless Networks Introduction Growth in wireless services is increasing the number of copper and ... • High quality services Figure Critical Measures for External and Internal Customers Operations: The Custodians of Evolving Networks Wireless networks are in constant change Reconfiguring circuits ... infrastructure Page  Foundation of Connectivity – Design for Craft Efficiency The wireless physical layer is destined to be a hybrid network for the foreseeable future Circuit-switched equipment will...

Ngày tải lên: 21/12/2013, 08:17

... connection/interface point Contact product management or TAC for more information X X Connectivity Solutions and Services for Wireless Networks Enabling Voice, VoIP, Messaging and IP Data Fiber ... business strategy when it comes time for any future upgrades, where flexibility is crucial for ongoing success For ‘Flexible Network’ network solutions, look to ADC for the copper and fiber infrastructure ... Protection for Coaxial lines also available (i.e DS3) (Lit# 101039AE) Multimedia Converion Solutions An optical extension platform providing a carrier-class, intelligent, scalable platform for Ethernet...

Ngày tải lên: 17/01/2014, 11:20

... non-cellular standards like for example Wireless LAN and Bluetooth In-building solutions are increasingly deployed and introduced to mobile networks, as user demands for “everywhere coverage” are ... end-users for fixed to mobile substitution, everywhere coverage etc, highlights the need for dedicated in-building solutions In-building solutions are required for providing good quality wireless ... are widely used for coverage of e.g road and train tunnels, but can also be used for other types of buildings or parts of buildings A repeater has a donor antenna that is used for communicating...

Ngày tải lên: 27/01/2014, 15:20

... proposes an opportunistic network coded cooperation scheme for small networks [13] To achieve a potential larger diversity gain of large wireless networks, in this paper, we propose Feedbackbased network ... performance Exploiting the network coding technology, ANCC adapts to the changing network topology to combat the wireless fading, which significantly outperforms Zhang et al EURASIP Journal on Wireless ... system mutual information can be written as the sum of the Shannon formula with all the instantaneous SNRs For fairness, the energy saved in the relay phase of FANCC is added uniformly to the terminals...

Ngày tải lên: 20/06/2014, 22:20

... throughput guarantee will be fulfilled For telecommunications networks in general, and for wireless networks in particular, soft throughput guarantees are more suitable for specifying QoS than hard throughput ... experimental investigations, is valuable for network providers We also develop an expression for the approximate TGVP for users in time-slotted networks, for any scheduling algorithm with the given ... scheduling techniques for wireless data networks, Master Thesis (Department of Physics, University of Oslo, Norway, 2005) S Lu, V Bharghavan, R Srikant, Fair scheduling in wireless packet networks IEEE/ACM...

Ngày tải lên: 21/06/2014, 01:20

... Improving TCP performance in integrated wireless communications networks Comput Netw 47, 219–237 (2005) CP Fu, SC Liew, TCP Veno, TCP enhancement for transmission over wireless access networks IEEE ... approach for multihop wireless networks Mobile Comput IEEE Trans 6(2), 192–205 (2007) D Yang, KC Leung, VOK Li, Simulation-based comparisons of solutions for TCP packet reordering in wireless networks, ... receiving TCP For delivering information successfully over wireless networks, the modification of TCP congestion control algorithms is necessary especially fast retransmission and recovery For the...

Ngày tải lên: 21/06/2014, 02:20