Cooperative communications in wireless networks novel approaches in the mac layer

... used in the relay nodes for achieving diversity gain Other approaches are proposed for exploiting the cooperation diversity in the MAC layer as well The main challenge in MAC is to find the best ... provide the overall maximum cooperation gain by applying CMAC in each hop In contrast to MAC, the process of the proposed cooperative routing scheme is controlled in the destination nodes Again, ... adapted in order to find the minimum-energy cooperative path in an ad hoc wireless network The minimum energy path is defined as the one in which the relays can provide the highest cooperation gain,...

Báo cáo hóa học: " Editorial Cooperative Communications in Wireless Networks" ppt

... 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, ... delve into the ou appropriate coding schemes for a two-user cooperative communications channel They propose the use of coordinate interleaved trellis codes over QPSK and 8PSK modulations exploiting ... will be very useful in order to select appropriate cooperative techniques for practical realizations of cooperative communications in future wireless communication networks In the second article,...

Tài liệu Designing for Profitability in the Physical Layer of Wireless Networks docx

... Designing for Profitability in the Physical Layer of Wireless Networks Introduction Growth in wireless services is increasing the number of copper and fiber cables ... costs by reducing the volume of unneeded repairs Non-intrusive Testing and Monitoring for Proactive Maintenance Maintaining the health of the network is the prime responsibility of Operations ... causing an increased workload for reconfigurations and maintenance Meeting the challenge of increasing profits in the face of fewer capital and operating resources to manage this steadily growing...

Báo cáo hóa học: " Improving network energy efficiency through cooperative idling in the multi-cell systems" pot

... thing, maximizing the NEE needs the global information in the cooperative multi-cell system but the users are difficult to get these global information to control their power cooperatively in the ... ICIC The increasing comes from two reasons The first one comes from the SINR improvement through exploiting the inter-cell interference and the second one comes from the joint EE power control The ... performs the same as MC-JP when rate constraint increases In order to externalize the performance of the network, we plot the NEE in the multi-cell systems Figure 10 plots the network layout in the...

Báo cáo hóa học: " Research Article An MC-SS Platform for Short-Range Communications in the Personal Network Context" pptx

... acts as an interpreter for the messages it receives from the host over the USB link It translates these commands into IEEE-802.15.3 format and forwards them to the M-HDR MAC module for further processing ... index parameters The MAC frame prepared by attaching the MAC header and the payload is then sent to the transmitter for the transmission over the air The transmitter block puts these frames into ... (CTA) The RX-frame processing module is responsible for receiving the frames from the baseband and forwarding them to the FCSL or DME The receiver upon receiving the frame from the baseband veriﬁes...

Báo cáo hóa học: " Editorial Multiuser Cooperative Diversity for Wireless Networks" pot

... end-toend performance of dual-hop cooperative selective diversity links, equipped with nonregenerative relays and operating over nonidentical Nakagami-m fading channels, is studied Closed-form expressions ... proposed scheme can gain eﬀective performance improvement through the adaptive selection of cooperative nodes and the coordination between multihop routing and cooperative MIMO transmissions Moreover, ... are presented for the cumulative distribution function and the probability density function of the end-to-end signal-to-noise ratio (SNR), while analytical formulae are derived for the moments...

Tài liệu Báo cáo Y học: Soluble silk-like organic matrix in the nacreous layer of the bivalve Pinctada maxima A new insight in the biomineralization ﬁeld pptx

... Pereira-Mouries et al (Eur J Biochem 269) Table Glycosaminoglycan analysis and calcium measurements of the water -soluble matrix, the EDTA -soluble matrix and the EDTA-insoluble matrix of Pinctada maxima ... Table Amino acid compositions (mole percent) of the water -soluble matrix, water-insoluble matrix, the EDTA -soluble matrix and the EDTAinsoluble matrix of Pinctada maxima nacre Results are expressed ... shell layer of the pearl oyster P maxima, was extracted by either ultra-pure water or EDTA and then fractionated into soluble and insoluble matrix by centrifugation Demineralization of powdered nacre...

motion in the two layer approximation - integrable case

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Investigation of Mg doping profile in the pcladding layer for highbrightness AlGaInPbased light emitting diodes.

... having different Mg doping profiles in the p-cladding layer The layer As the [Cp2 Mg] /[III] value in the “b” zone was inset in (b) shows the relative increase of brightness for the same LEDs increased ... having different Mg doping profiles in the p-cladding layer Table I Detailed Mg doping profiles for “a,” “b,” and “c” zones in the p-cladding layer of LED structures Mg Doping profile at p-cladding ... rate of about teristics of LEDs having different Mg doping levels in the 1.5 m/h The multi-quantum well (MQW) structures for “b” zone In addition, the relative increase of Pout (RIP) of emitting...

Báo cáo hóa học: " Research Article Cross-Layer Handover Scheme for Multimedia Communications in Next Generation Wireless Networks" potx

... algorithm providing better performance to the multiinterface terminals in the integrated networks can be found in [18] 3.2.4 SIP and MIP Bing Update After sending UNA to the NAR for announcing its existence, ... For achieving the fast handover procedure, cross-layer schemes have been investigated widely Among them, some use MIH to facilitate handover while others not In [12], an integrated mobility scheme ... deleted in FASM, and thereby the signaling load can be reduced The MN obtains the network’s neighboring information by the MIH Get Information request/response messages, and stores the information...

Báo cáo hóa học: " Research Article Cooperative Coding and Caching for Streaming Data in Multihop Wireless Networks" ppt

... original data segments, and we refer to it as Cooperative Coding and Caching (C ); compre for example Network Coding (NC) and no coding at all (Non-NC ) 3.1 Overview of Cooperative Coding and Caching ... the caching data management This paper takes advantages of coding to facilitate the caching management for streaming data in multihop wireless networks Network coding was ﬁrst introduced in [21] ... networks Conclusion and Future Work In this paper, we introduced a novel solution for caching management of streaming data in multihop wireless networks, Cooperative Coding and Caching (C ), which...

báo cáo hóa học:" Multiple access communications in future-generation wireless networks" potx

... “Polarization Division Multiple Access With Polarization Modulation for LOS Wireless Communications by Bin Cao, Qin-Yu Zhang, and Lin Jin discusses a potential multiple access and modulation ... Multiple access communications in future-generation wireless networks Norman Abramson1, Claudio Sacchi2, Boris Bellalta*3 and Alexey Vinel4 Department of Electrical Engineering, University ... orthogonality among training sequences and introduce multiple access interference (MAI) To reduce the effect of the MAI, the authors find the CAZAC sequence that maximizes the signal-to-interference ratio...

Báo cáo hóa học: " Research Article An 802.11k Compliant Framework for Cooperative Handoff in Wireless Networks" docx

... communication interface for information exchange In other words, we could keep the ﬁrst interface for data communication and the second for channel scanning and control information sharing This approach ... on top of the main mechanisms determined by the 802.11k standard and it is fully compliant with it More information about the performance of the 802.11k standard can be obtained in [28] Our simulation ... STAs/APs Our cooperative framework is compliant to 802.11k and it utilizes information exchange and measurement mechanisms that are speciﬁed in the standard in order to eliminate the scanning/probe...

Báo cáo hóa học: " Editorial Cooperative Localization in Wireless Ad Hoc and Sensor Networks" pdf

... two papers address the problem of localizing and tracking objects using a WSN In particular, the paper Localization capability of cooperative anti-intruder radar systems” by E Paolini et al considers ... position themselves without injecting network traffic UWB is a promising technology for accurate localization in harsh environments and it is specifically addressed in the following two papers The first ... time-based algorithm for positioning mobile terminals in wireless networks” by I Martin-Escalona and F Barcelo-Arroyo, a hybrid localization technique is proposed The positioning algorithm, named time...

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