interference in wireless networks

... aggregating per-link information, if desired Correspondingly, each outgoing link from a node to a different neighbor also maintains an independent value of CWmin, which would be adjusted according ... as the victim link and the link CD (in Figure 3.1(a)), link CB (in Figure 3.1(b)) and link DC (in Figure 3.1(c)) as the offending links The sender on the offending link is referred to as the offender ... effect in a mesh network we propose a Minimum Power for ACK (MinPACK) protocol to improve efficiency by mitigating the interference due to MAC Acknowledgment frames in WLAN [78] In this thesis, we investigate...

Ngày tải lên: 09/09/2015, 11:30

... of Engineering School of Engineering Publisher: Blekinge Institute of Technology Blekinge Institute of Technology Printed by Kaserntryckeriet, Karlskrona, Sweden 2006 ISBN 91-7295-096-X Printed ... typeset using L TEX To my family Abstract Wireless and Mobile Internet have changed the way people and businesses operate Communication from any Internet access point, including wireless networks ... context of demand modeling and provisioning For instance, [27] is using a ΔT = interval when measuring the point-to-point traffic matrix in the IP backbone Data are analyzed e.g regarding the mean-variance...

Ngày tải lên: 18/10/2013, 12:15

... presence of link errors In order to handle wireless link errors within TaLE framework, we need to measure and reflect link reliability into the proposed algorithm Underlying reasoning for this information ... when a wireless link error scenario comes into play in order to see whether the fairness is supported in time-varying unreliable wireless link, which is to verify the role of ωis in calculating ... unfairness by reducing the chances of transmission for the sending stations in the way of increasing the minimum contention window size The downlink compensation access (DCA) algorithm in [16] gives...

Ngày tải lên: 20/06/2014, 22:20

... since we model the interference more accurately through the SINR interference model We follow a different approach from [4-9] since we formulate the minimum-length scheduling problem as finding ... fairness in wireless networks, in Proceedings of Conference on Information Sciences and Systems (CISS) (2008) 24 A Pantelidou, A Ephremides, What is optimal scheduling in wireless networks? , in Proceedings ... problem of joint scheduling and rate control in single-hop wireless networks under the objective of minimizing the required time to deliver all data traffic to the intended destinations First,...

Ngày tải lên: 20/06/2014, 22:20

... presence of link errors In order to handle wireless link errors within TaLE framework, we need to measure and reflect link reliability into the proposed algorithm Underlying reasoning for this information ... when a wireless link error scenario comes into play in order to see whether the fairness is supported in time-varying unreliable wireless link, which is to verify the role of ωis in calculating ... unfairness by reducing the chances of transmission for the sending stations in the way of increasing the minimum contention window size The downlink compensation access (DCA) algorithm in [16] gives...

Ngày tải lên: 21/06/2014, 00:20

... Robin Scheduling Max CNR Scheduling Proportional Fair Scheduling Normalized CNR Scheduling Borst&Whiting Scheduling Optimal Scheduling Adaptive Optimal Scheduling Adaptive Optimal Scheduling ... Robin Scheduling Max CNR Scheduling Proportional Fair Scheduling Normalized CNR Scheduling Borst&Whiting Scheduling Optimal Scheduling Adaptive Optimal Scheduling Adaptive Optimal Scheduling ... Robin Scheduling Max CNR Scheduling Proportional Fair Scheduling Normalized CNR Scheduling Borst&Whiting Scheduling Optimal Scheduling Adaptive Optimal Scheduling Adaptive Optimal Scheduling...

Ngày tải lên: 21/06/2014, 01:20

... one interface card to connect to different wireless networks Since the MN has many available network interfaces, the link between the CN and MN has many independent transmission paths (multihoming) ... Packet Loss Model for Wireless Packet losses in wireless networks often result from a user moving out of range of the signal, interference from other signals, or handoff Wireless channel errors ... for wireless networks called qualityaware SCTP This mechanism uses cycle counting—rather than single counting as in standard SCTP—to detect path failures Cycle counting improves on the original...

Ngày tải lên: 21/06/2014, 18:20

... RTTmin updating algorithm, in which RTTmin is multiplied by a reducing factor less than one However, since the RTTmin updating algorithm is invoked whenever a congestion event occurs, RTTmin goes ... only consider last-hop wireless networks, that is, only the link between BS and user equipments is wireless, such as cellular networks and infrastructure Wireless Local Area Networks (WLANs) The ... the wireless link In LL-ELSN, there is no additional transmission over the wireless link and thus it has no detection failure in uplink communication LL-ELSN also has no detection failure in downlink...

Ngày tải lên: 21/06/2014, 20:20

... collaboratively detect wireless intrusions [5, 11] Wavelet Theory Fundamentals Intrusion Detection in Wireless Networks This section examines the state of intrusion detection in wireless networks, with ... fingerprinting using signal phase,” in Proceedings of the Secure Mobile Ad-hoc Networks and Sensors Workshop, Held in Conjunction with the International Industrial Simulation Conference (ISC ’05), Singapore, ... Kranakis, “Detecting rogue devices in bluetooth networks using radio frequency fingerprinting,” in Proceedings of the 3rd IASTED International Conference on Communications and Computer Networks (CCN...

Ngày tải lên: 21/06/2014, 22:20

... 2 EURASIP Journal on Wireless Communications and Networking this protocol, both under an individual and a sum-power constraint assuming perfect channel state information ¨ In the third article, ... multiplexing The system uses a distributed implementation of an Alamouti code and discusses several interesting implementation issues Experimental results show gains in the order of dB to maintain ... the two-hop relay channel, including the direct link, is considered In both cases, the goal is to design protocols to touch all points of the optimal diversity multiplexing tradeoff region Cooperative...

Ngày tải lên: 21/06/2014, 22:20

... Krizanc, and P Morin, “Improving distance based geographic location techniques in sensor networks, ” in Proceedings of the 3rd International Conference on Ad-Hoc, Mobile, and Wireless Networks (ADHOC-NOW ... original incarnation of CL is described by Bulusu et al [17] and localizes the transmitting source of a message to the (x, y) coordinates obtained from averaging the coordinates of all receiving ... defined for WCL in (2), but with a linearly increasing weight assigned to each receiver according to its presumed proximity to the transmitter Given the RSS values in Υ, as found in Definition 4.1,...

Ngày tải lên: 21/06/2014, 23:20

... (INFOCOM ’06), Barcelona, Spain, April 2006 [13] S Shin, A G Forte, A S Rawat, and H Schulzrinne, “Reducing MAC layer handoff latency in IEEE 802.11 wireless LANs,” in Proceedings of the 2nd International ... containing the neighbor request to the old AP Old AP sends back a neighbor report (included into the probe response) containing information about neighboring APs, that was collected by them during ... gains in performance as compared to other schemes The main reason for this improvement is that in our framework we avoid unavailing channel scanning Besides, the information sharing that is introduced...

Ngày tải lên: 21/06/2014, 23:20

... minimum Then we assign each variable xi in F a value depending on which set of edges with endpoints in {xi1 , xi2 } is included in the feedback arc set If all the edges from xi1 to xi2 are in ... will be interesting topics to dig in more REFERENCES [1] N Dunlop, J Indulska, and K Raymond, “Methods for conflict resolution in policy-based management systems,” in Proceedings of 7th IEEE International ... Professor at Florida International University His research area includes network security and multicasting, wireless networks, intrusion detection, adaptive routing and forwarding protocols, flow...

Ngày tải lên: 22/06/2014, 22:20

... help in preparing the final manuscript REFERENCES [1] IEEE Signal Processing Magazine, “Location is everything: positioning in wireless networks (a special issue),” IEEE Signal Processing Magazine, ... Khajehnouri, “Network-based wireless location: challenges faced in developing techniques for accurate wireless location information,” IEEE Signal Processing Magazine, vol 22, no 4, pp 24–40, ... Gunnarsson, “Mobile positioning using wireless networks: possibilities and fundamental limitations based on available wireless network measurements,” IEEE Signal Processing Magazine, vol 22, no 4, pp...

Ngày tải lên: 22/06/2014, 23:20

... attacks against wireless communications Since there is no physical boundary existing in wireless networks like in wired networks, attackers can easily gain unauthorized access to wireless networks ... attacks are more effective in wireless networks since wireless networks are resource-constrained Moreover, privacy information like identity and location in wireless networks can be the target ... protocols cannot be directly used in wireless networks since they are originally designed for wired networks and differences of wireless networks make them inapplicable in wireless environments Previous...

Ngày tải lên: 11/09/2015, 14:35

... decision making, overhead minimization, and etc In this thesis, these issues are studied in the field of Wireless LANs and Wireless Sensor Networks by applications In the area of Wireless LANs, ... improvement, without incurring significant network overheads, in the downlink of Wireless LAN In chapter 5, a novel hybrid opportunistic forwarding protocol for wireless sensor networks, which we ... directly in the graph A maximal independent set is an independent set that is not a subset of any other independent set A maximal independent set is also a dominating set in the graph, and every dominating...

Ngày tải lên: 14/09/2015, 08:42

... of them are interested in forming an ad hoc network for sharing some information, instead, for them, accessing to the internet are much more interesting In this case, users are looking for multipurpose ... function of SINR and a decreasing function of power By increasing power, the user can increase her SINR, however, it may require others to increase their own power to maintain the desired SINR Thus, ... Coverage Game in Wireless Sensor Networks After the introduction of game theory and Nash equilibrium in Chapter 2, in this chapter we apply game theoretical methods in wireless sensor networks and...

Ngày tải lên: 15/09/2015, 22:30

... some delay in sending CSR is allowed The measurement of channel conditions can be achieved using some pilot/training bits in each frame, e.g., the training bits in a GSM frame [65] In UMTS, a ... the main functionality of each module Transmission scheduling From a single user’s point of view, transmission scheduling determines the times for transmitting the head of line packet in the ... integer nonlinear programming technique in the design of optimal resource management [74] In this thesis, we apply MDP theory in policy design for the three allocation problems Before going into...

Ngày tải lên: 16/09/2015, 17:12

... providing significant performance gains for the wireless channel due to the fact that fading occurs independently in each link and hence, the probability of having a good link to D increases by increasing ... link is considered, whereas in [74] the effect of multi user interference on the link quality is also taken into consideration In addition, a reinforcement learning framework is introduced in ... found in [3], and also online at [45] 16 1.2 Ultra Wideband Networks Ultra wide band (UWB) emerging technology has received increasing research attention during the past decade since its introduction...

Ngày tải lên: 03/10/2015, 21:57

... maximization 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 ... for incrementally increasing values of the self -interference coefficient It alternates between two steps: increasing the value of a virtual self -interference coefficient gv (note that this increasing ... techniques by reinterpreting appropriately the interference coefficients For example, in the case of wireless CDMA networks the interference coefficient gi j (t) would model the residual interference...

Ngày tải lên: 21/06/2014, 11:20