internet protocols over wireless networks

... nodes in selfish packet-forwarding wireless networks, ” in Proceedings of the 5th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt ’07), Limassol, ... March 2003 [6] J N Laneman, D N C Tse, and G W Wornell, “Cooperative diversity in wireless networks: efficient protocols and outage behavior,” IEEE Transactions on Information Theory, vol 50, no ... and F Paganini, “Mechanism-based resource allocation for multimedia transmission over spectrum agile wireless networks, ” IEEE Journal on Selected Areas in Communications, vol 25, no 3, pp 601–...

Ngày tải lên: 21/06/2014, 20:20

... overflow of the buffer in nodes [2] In this paper, we use fuzzy logic techniques to develop a new queue management scheme in hop by hop wireless networks The application of fuzzy control in networks ... by hop wireless networks 3.3 Fuzzy control algorithm Our model of fuzzy control system is based on a queue management scheme to provide transmission rate control in hop by hop wireless networks ... incompleted, often poor and time delayed In order to enable wireless image and multimedia communication, the bottlenecks to communicating image data over wireless must be addressed Network congestion control...

Ngày tải lên: 28/03/2014, 13:20

... h.kazemian@londonmet.ac.uk Abstract This article studies a vital issue in wireless communications, which is the transmission of audio signals over wireless networks It presents a novel interleaver scheme for protection ... received audio signal It improves the amount of the throughput over the wireless link through the packet loss reduction Keywords: wireless networks; Bluetooth; fading channels; interleaving techniques; ... Performance of the audio signals transmission over wireless networks with the channel interleaving considerations Mohsen Ahmed Mahmoud Mohamed El-Bendary1,...

Ngày tải lên: 20/06/2014, 20:20

... improve the performance of TCP over wireless networks To address this issue, we propose a unified solution called TCP NCE for improving the performance of TCP over wireless networks by reducing the ... improvement over other popular TCP variants The rest of this article is organized as follows In ‘TCP in wireless networks Page of 20 section, we describe the behavior of TCP in wireless networks ... contention of nodes Moreover, in wireless networks, the interferences between neighboring nodes are much higher compared to local area networks As a result, the bit error rates of wireless links are...

Ngày tải lên: 21/06/2014, 02:20

... h.kazemian@londonmet.ac.uk Abstract This article studies a vital issue in wireless communications, which is the transmission of audio signals over wireless networks It presents a novel interleaver scheme for protection ... received audio signal It improves the amount of the throughput over the wireless link through the packet loss reduction Keywords: wireless networks; Bluetooth; fading channels; interleaving techniques; ... Performance of the audio signals transmission over wireless networks with the channel interleaving considerations Mohsen Ahmed Mahmoud Mohamed El-Bendary1,...

Ngày tải lên: 21/06/2014, 20:20

... considered only the packet loss during the transmission over the wireless link without taking into account the congestion due to the background traffic over the same link and the video resolution in terms ... implemented a wireless IEEE 802.11g [36] network that can support nominal data rate up to 54 Mbps; yet in practice only half of the advertised bit rate can be achieved because wireless networks are ... system performances varying the wireless link quality in terms of signal power level Using network stumbler [37] we obtained the signal power level values over the wireless link depending on the...

Ngày tải lên: 21/06/2014, 22:20

... handover mobility scheme for next-generation IP-based wireless systems In the fourth paper, A Fernandez-Duran et al propose a dimensioning method for conversational video applications in wireless ... environment in heterogeneous wireless networks comes from the limited power supply of small-size and low-cost mobile terminals as in stand-alone WLANs or cellular networks, S Lee et al propose ... the transmission of multiple video streams over a wireless local area network (WLAN) A cross-layer optimization framework is proposed to minimize the wireless transceiver energy consumption while...

Ngày tải lên: 21/06/2014, 22:20

... Comparison of Reliable Protocols We now use wireless traces collected over real networks to empirically evaluate protocols under study The first part of EURASIP Journal on Wireless Communications ... used in wireless ARQ protocols, ” Wireless Networks, vol 5, pp 279–286, 1999 [14] Y Sankarasubramaniam, I F Akyildiz, and S W McLaughlin, “Energy efficiency based packet size optimization in wireless ... Krishnamurthy, “PSFQ: a reliable transport protocol for wireless sensor networks, ” in Proceedings of the ACM International Workshop on Wireless Sensor Networks and Applications (WSNA ’02), pp 1–11, Atlanta,...

Ngày tải lên: 21/06/2014, 22:20

... frame: FDA = overlap(GT, AR) , (1/2) #GTo + #ARo (17) where again #GTo is the number of GT objects for a given frame (#ARo accordingly) The overlap ratio is given by #(ARo →GTo ) overlap(GT, AR) ... Journal on Image and Video Processing Overlap ratio thresholded (ORT) [32] TN This metric takes into account a required spatial overlap between the objects The overlap is defined by a minimal threshold: ... of overlapping frames Result tracks Step [o 11, o 12, , o 1Nr] [o 21, o 22, , o 2Nr] Frame no (time) { Overlap o i j ··· [o Ng1, , o NgNr] Ng ×Nr correspondence matrix with number of overlapping...

Ngày tải lên: 22/06/2014, 00:20

... not consider packet loss rates beyond 10% for wired networks, we consider higher loss rates considering “shadowing” and interference in wireless networks, which could be ad hoc [12] (where hosts ... discuss novel strategies for wireless network management, including QoS provisioning, hybrid channel allocation, and database and location management schemes for wireless networks [20–24]; however, ... 46–48], the base layer cannot be lost Retransmission adds an overhead on bandwidth limited connections, in particular on wireless and mobile networks Without the need to retransmit the base layer,...

Ngày tải lên: 22/06/2014, 00:20

... session over 3GPP networks (GPRS, EDGE, and UMTS) Packet errors are simulated using error masks generated from link-level simulations at various bearer rates and block error rate (BLER) values Moreover, ... study proposes a complete framework for scalable and media aware adaptive video streaming over wireless networks At the source coding, we developed an efficient coding method to detect ROIs and transmit ... 2004 [7] E Setton, Z Xiaoqing, and B Girod, “Congestion-optimized scheduling of video over wireless ad hoc networks, ” in Proceedings of the IEEE International Symposium on Circuits and Systems...

Ngày tải lên: 22/06/2014, 01:20

... is being reduced) WIRELESS ROUTER SYSTEM WITH PARALLEL SEQUENTIAL DECODERS This section provides a study over a wireless router that manages all the traffic coming from wireless networks Our study ... quential decoding system for UDP-based systems for wireless multimedia networks, ” in Proceedings of the International Conference on Wireless Networks (ICWN ’06), Las Vegas, Nev, USA, June 2006 ... send Internet packets (typically of size KB) over a wireless link (where packets have the size of around 300 bytes) or over the so-called ATM networks (in which cells have the size of 52 bytes)...

Ngày tải lên: 22/06/2014, 19:20

... high-priority layer varies with the overall rate That is why we need the complex adaptation described in Section On the other hand with SNR scalability, as Figure shows, over a wide range from 20 to ... and Ph.D degrees from University of Essex, UK, in computer and information networks (2000) and layered image and video wireless transmission (2005), respectively Currently he is a Lecturer at the ... layer will have less opportunity for protection, that is, RLP will be more often switched to 1/1 To overcome this problem, we employ HQAM to offer prioritisation as discussed below 2.2 UEP-DP with...

Ngày tải lên: 22/06/2014, 23:20

... every frame Since the precoded video is transmitted over error prone wireless networks, sublayers are subject to loss and have certain recovery rates given a particular rate shaping decision ... of the overall PSNR At all wireless channel conditions, FGRS outperforms UPPRS Figure 25b shows the overall PSNR at various speeds at SNR = 10 dB Fixed SNR value gives the same BER of the wireless ... preferred over the hill-climbingbased approach In addition, as mentioned in Section 3.2, Step can be skipped without too much performance degradation FGRS for Video Streaming over Wireless Networks...

Ngày tải lên: 23/06/2014, 01:20

... Abstract This thesis addresses the problem of developing MAC protocols for wireless networks, in particularly, wireless sensor networks and wireless ad-hoc network Firstly, to provide energy-efficient ... MAC protocols for wireless ad-hoc networks and also energy-efficient MAC protocols for WSNs Chapter presents the design and evaluation of our traffic-adaptive multi-channel MAC protocol for wireless ... receiving • Overheads There are several forms of overheads Firstly, control or signaling packets consume resources too Therefore, it is wise to measure the impact of using such overheads in overcoming...

Ngày tải lên: 10/11/2015, 11:29

... 2003 Preface Wireless networks are evolving into wireless IP (Internet Protocol) networks to overcome the limitations of traditional circuit-switched wireless networks Wireless IP networks are ... systems covering larger geographical areas Therefore, wireless networks are usually optimized to fit different coverage areas and communications needs Based on radio coverage ranges, wireless networks ... multimedia traffic over the wireless networks significantly The evolution of mobile services is illustrated in Figure 1.8 1.3 MOTIVATIONS FOR IP-BASED WIRELESS NETWORKS Wireless networks are evolving...

Ngày tải lên: 03/06/2014, 01:45

... approach to CoD media delivery over composite wireless networks Channel model 2.1 Dynamic channel model Understanding the dynamic nature of channel load (such as from the Internet traffic), using a ... doi:10.1186/1687-1499-2011-148 Cite this article as: Farnham: Adaptive cognitive media delivery over composite wireless networks EURASIP Journal on Wireless Communications and Networking 2011 2011:148 Submit your manuscript ... centric optimisation for the wireless local area, in IEEE PIMRC, pp 1–5 (2007) T Farnham, M Sooriyabandara, C Efthymiou, Enhancing multimedia streaming over existing wireless LAN technology using...

Ngày tải lên: 20/06/2014, 22:20

... Westwood still overestimates the available bandwidth The incorrect estimation may result in poor performance in the wireless network Besides, over asymmetric links, such as 3G wireless networks, cannot ... attractive in the wired -wireless networks, this paper proposed a new congestion control scheme with end-to-end semantics which is based on jitter ratio over wired -wireless networks, called JSCTP ... BER wireless networks Based on the characteristic of SCTP packet, SCTP sender can transmit chunks into small packets by disassembling large packets, to alleviate wireless losses in high BER wireless...

Ngày tải lên: 21/06/2014, 05:20

... content over hybrid wired /wireless ad hoc networks and the design of innovative radio access schemes Details of the API allowing highfidelity simulations by transmitting bits and bytes over the ... framework (MF) for simulating wireless and mobile networks using OMNeT++,” http://mobility-fw.sourceforge net/ [4] A Kopke, et al., “Simulating wireless and mobile networks in omnet++ the mixim ... transmission of multimedia data [16, 17], in particular over unreliable protocols such as UDP or UDP-Lite, the resilience of advanced decoders can be used to overcome remaining errors or losses thanks to...

Ngày tải lên: 21/06/2014, 23:20