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		<title><![CDATA[ Communications Surveys & Tutorials, IEEE - new TOC ]]></title>
		<link>http://ieeexplore.ieee.org</link>
		<description>TOC Alert for Publication# 9739 </description>
		<year>2010</year>
		<month>February </month>
		<day>09</day>
		<item>
			<title><![CDATA[Fourth quarter 2009 IEEE communications surveys and tutorials]]></title>
			<link><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343059]]></link>
			<description><![CDATA[Welcome to the fourth issue of 2009 of the IEEE Communications Surveys and Tutorials. Paper in this issue survey the research effort in several areas such mobility in Wimax, mobility models in VANET, handoff in cellular networks, admission control in MANETS, physical impairments in optical networks, physical layer issues in the 802.11n standard as well as jamming in wireless sensor networks]]></description>
			<pubDate><![CDATA[Fourth Quarter  2009]]></pubDate>
			<guid><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343059]]></guid>
			<volume>11</volume>
			<issue>4</issue>
			<startPage>1</startPage>
			<endPage>2</endPage>
			<fileSize>54</fileSize>
			<authors><![CDATA[da Fonseca, N.L.S.;]]></authors>
		</item>
		<item>
			<title><![CDATA[A survey on next generation mobile WiMAX networks: objectives, features and technical challenges]]></title>
			<link><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343060]]></link>
			<description><![CDATA[In order to meet the requirements of 4G mobile networks targeted by the cellular layer of IMT-advanced, next generation mobile WiMAX devices based on IEEE 802.16m will incorporate sophisticated signal processing, seamless handover functionalities between heterogeneous technologies and advanced mobility mechanisms. This survey provides a description of key projected features of the physical (PHY) and medium access control (MAC) layers of 802.16m, as a major candidate for providing aggregate rates at the range of Gbps to high-speed mobile users. Moreover, a new unified method for simulation modeling, namely the evaluation methodology (EVM), introduced in 802.16m, is also presented.]]></description>
			<pubDate><![CDATA[Fourth Quarter  2009]]></pubDate>
			<guid><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343060]]></guid>
			<volume>11</volume>
			<issue>4</issue>
			<startPage>3</startPage>
			<endPage>18</endPage>
			<fileSize>1050</fileSize>
			<authors><![CDATA[Papapanagiotou, I.;Toumpakaris, D.;Jungwon Lee;Devetsikiotis, M.;]]></authors>
		</item>
		<item>
			<title><![CDATA[Mobility models for vehicular ad hoc networks: a survey and taxonomy]]></title>
			<link><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343061]]></link>
			<description><![CDATA[Vehicular Ad-hoc Networks (VANETs) have been recently attracting an increasing attention from both research and industry communities. One of the challenges posed by the study of VANETs is the definition of a vehicular mobility model providing an accurate and realistic vehicular mobility description at both macroscopic and microscopic levels. Another challenge is to be able to dynamically alter this vehicular mobility as a consequence of the vehicular communication protocols. Many mobility models have been developed by the community in order to solve these two issues. However, due to the large number of available models claiming to be adapted to vehicular traffic, and also due to their different and somehow incomparable features, understanding their true characteristics, their degree of realism with respect to vehicular mobility, and real capabilities is a hard task. In this survey, we first introduce a framework that proposes a guideline for the generation of vehicular mobility models. Then, we illustrate the different approaches chosen by the community for the development of vehicular mobility models and their interactions with network simulators. Finally, we propose an overview and taxonomy of a large range of mobility models available for vehicular ad hoc networks. The objective is to provide readers with a guideline to easily understand and objectively compare the different models, and eventually identify the one required for their needs.]]></description>
			<pubDate><![CDATA[Fourth Quarter  2009]]></pubDate>
			<guid><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343061]]></guid>
			<volume>11</volume>
			<issue>4</issue>
			<startPage>19</startPage>
			<endPage>41</endPage>
			<fileSize>753</fileSize>
			<authors><![CDATA[Harri, J.;Filali, F.;Bonnet, C.;]]></authors>
		</item>
		<item>
			<title><![CDATA[A survey on jamming attacks and countermeasures in WSNs]]></title>
			<link><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343062]]></link>
			<description><![CDATA[Jamming represents the most serious security threat in the field of wireless sensor networks (WSNs), as it can easily put out of order even WSNs that utilize strong highlayer security mechanisms, simply because it is often ignored in the initial WSN design. The objective of this article is to provide a general overview of the critical issue of jamming in WSNs and cover all the relevant work, providing the interested researcher pointers for open research issues in this field. We provide a brief overview of the communication protocols typically used in WSN deployments and highlight the characteristics of contemporary WSNs, that make them susceptible to jamming attacks, along with the various types of jamming which can be exercised against WSNs. Common jamming techniques and an overview of various types of jammers are reviewed and typical countermeasures against jamming are also analyzed. The key ideas of existing security mechanisms against jamming attacks in WSNs are presented and open research issues, with respect to the defense against jamming attacks are highlighted.]]></description>
			<pubDate><![CDATA[Fourth Quarter  2009]]></pubDate>
			<guid><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343062]]></guid>
			<volume>11</volume>
			<issue>4</issue>
			<startPage>42</startPage>
			<endPage>56</endPage>
			<fileSize>765</fileSize>
			<authors><![CDATA[Mpitziopoulos, A.;Gavalas, D.;Konstantopoulos, C.;Pantziou, G.;]]></authors>
		</item>
		<item>
			<title><![CDATA[Handoff prioritization and decision schemes in wireless cellular networks: a survey]]></title>
			<link><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343063]]></link>
			<description><![CDATA[Handoff is a key element in wireless cellular networks in order to provide quality of service (QoS) to the users and to support users' mobility. Handoff failure will result in the forced termination of an ongoing call. From the user's point of view, the service of a handoff request is more important, as the forced termination of an ongoing call is more annoying than the blocking of new calls. Therefore, in order to support QoS to the users and to provide ubiquitous coverage, the handoff procedure ought to be further investigated. This paper provides a comprehensive survey of the basic elements, the different types and phases of the handoff procedure. Moreover, particular interest has been given in the horizontal handoff execution phase by discussing and classifying the most recent handoff prioritization schemes into categories based on the concepts that these schemes adopt, e.g. channel reservation, handoff queueing, channel transferred, subrating, genetic and hybrid schemes and in the vertical handoff decision phase by presenting different decision algorithms.]]></description>
			<pubDate><![CDATA[Fourth Quarter  2009]]></pubDate>
			<guid><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343063]]></guid>
			<volume>11</volume>
			<issue>4</issue>
			<startPage>57</startPage>
			<endPage>77</endPage>
			<fileSize>586</fileSize>
			<authors><![CDATA[Sgora, A.;Vergados, D.;]]></authors>
		</item>
		<item>
			<title><![CDATA[Admission control schemes for 802.11-based multi-hop mobile ad hoc networks: a survey]]></title>
			<link><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343064]]></link>
			<description><![CDATA[Mobile ad hoc networks (MANETs) promise unique communication opportunities. The IEEE 802.11 standard has allowed affordable MANETs to be realised. However, providing quality of service (QoS) assurances to MANET applications is difficult due to the unreliable wireless channel, the lack of centralised control, contention for channel access and node mobility. One of the most crucial components of a system for providing QoS assurances is admission control (AC). It is the job of the AC mechanism to estimate the state of the network's resources and thereby to decide which application data sessions can be admitted without promising more resources than are available and thus violating previously made guarantees. Unfortunately, due to the aforementioned difficulties, estimating the network resources and maintaining QoS guarantees are non-trivial tasks. Accordingly, a large body of work has been published on AC protocols for addressing these issues. However, as far as it is possible to tell, no wide-ranging survey of these approaches exists at the time of writing. This paper thus aims to provide a comprehensive survey of the salient unicast AC schemes designed for IEEE 802.11- based multi-hop MANETs, which were published in the peer-reviewed open literature during the period 2000-2007. The relevant considerations for the design of such protocols are discussed and several methods of classifying the schemes found in the literature are proposed. A brief outline of the operation, reaction to route failures, as well as the strengths and weaknesses of each protocol is given. This enables patterns in the design and trends in the development of AC protocols to be identified. Finally, directions for possible future work are provided.]]></description>
			<pubDate><![CDATA[Fourth Quarter  2009]]></pubDate>
			<guid><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343064]]></guid>
			<volume>11</volume>
			<issue>4</issue>
			<startPage>78</startPage>
			<endPage>108</endPage>
			<fileSize>685</fileSize>
			<authors><![CDATA[Hanzo, L.;Tafazolli, R.;]]></authors>
		</item>
		<item>
			<title><![CDATA[Physical layer impairment aware routing (PLIAR) in WDM optical networks: issues and challenges]]></title>
			<link><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343065]]></link>
			<description><![CDATA[In WDM optical networks, the physical layer impairments (PLIs) and their significance depend on network type-opaque, translucent, or transparent; the reach-access, metro, or core/long-haul; the number and type of network elements-fiber, wavelengths, amplifiers, switching elements, etc.; and the type of applications-real-time, non-real time, missioncritical, etc. In transparent optical networks, PLIs incurred by non-ideal optical transmission media accumulate along an optical path, and the overall effect determines the feasibility of the lightpaths. If the received signal quality is not within the receiver sensitivity threshold, the receiver may not be able to correctly detect the optical signal and this may result in high bit-error rates. Hence, it is important to understand various PLIs and their effect on optical feasibility, analytical models, and monitoring and mitigation techniques. Introducing optical transparency in the physical layer on one hand leads to a dynamic, flexible optical layer with the possibility of adding intelligence such as optical performance monitoring, fault management, etc. On the other hand, transparency reduces the possibility of client layer interaction with the optical layer at intermediate nodes along the path. This has an impact on network design, planning, control, and management. Hence, it is important to understand the techniques that provide PLI information to the control plane protocols and that use this information efficiently to compute feasible routes and wavelengths. The purpose of this article is to provide a comprehensive survey of various PLIs, their effects, and the available modeling and mitigation techniques. We then present a comprehensive survey of various PLI-aware network design techniques, regenerator placement algorithms, routing and wavelength assignment algorithms, and PLI-aware failure recovery algorithms. Furthermore, we identify several important research issues that need to be addressed to realize dynamical-
ly reconfigurable next-generation optical networks. We also argue the need for PLI-aware control plane protocol extensions and present several interesting issues that need to be considered in order for these extensions to be deployed in real-world networks.]]></description>
			<pubDate><![CDATA[Fourth Quarter  2009]]></pubDate>
			<guid><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343065]]></guid>
			<volume>11</volume>
			<issue>4</issue>
			<startPage>109</startPage>
			<endPage>130</endPage>
			<fileSize>757</fileSize>
			<authors><![CDATA[Saradhi, C.V.;Subramaniam, S.;]]></authors>
		</item>
		<item>
			<title><![CDATA[Evolution, insights and challenges of the PHY layer for the emerging ieee 802.11n amendment]]></title>
			<link><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343066]]></link>
			<description><![CDATA[IEEE 802.11n is a newly emerged WLAN standard capable of providing dramatically increased throughput, as well as improved range, reduced signal fading, over the existing IEEE 802.11a/g WLAN standards. These benefits are achieved through use of MIMO (multiple-input,multiple-output). The latest draft for IEEE 802.11n describes rates up to 600 Mbps, exceeding the maximum rate with the 11a/g standards by more than ten times. In addition, techniques such as space-time block coding and beamforming provide the potential of increasing signal strength at the receiver with optimal efficiency, based on the diversity order used. In this paper, a comparative analysis of the physical (PHY) layers in the original main proposals for the 11n amendment (the TGn Sync, WWiSE and TGn Joint proposals) is presented. The key architectural differences governing the performance of these proposals are outlined. In addition, insights are provided into the choices leading to the TGn Joint proposal, which reflects the PHY architecture described in the 11n standard. The insights and challenges described relate to the choices made in the TGn Joint proposal regarding the areas of channel estimation (considering the use of beamforming, channel smoothing), bit interleaving techniques (for maximizing coding gain under channels with high frequency diversity), space-time block coding (STBC) options (designed in an effort to achieve a good balance between achieving high diversity gain and low receiver design complexity), and pilot tone selection (for a reasonable tradeoff of robustness and link-level performance). Performance curves (based on simulation models developed in MATLAB/SIMULINK) are used to verify the analysis presented. This paper also includes a discussion of some of the future challenges for the 11n amendment.]]></description>
			<pubDate><![CDATA[Fourth Quarter  2009]]></pubDate>
			<guid><![CDATA[http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=5343058&arnumber=5343066]]></guid>
			<volume>11</volume>
			<issue>4</issue>
			<startPage>131</startPage>
			<endPage>150</endPage>
			<fileSize>4174</fileSize>
			<authors><![CDATA[Paul, T.K.;Ogunfunmi, T.;]]></authors>
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