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Wireless Communications, IEEE

Issue 4 • Date Aug. 2009

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Displaying Results 1 - 18 of 18
  • IEEE Wireless Communications - Front cover

    Page(s): C1
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    Freely Available from IEEE
  • Table of contents

    Page(s): 1
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    Freely Available from IEEE
  • Service-oriented design for broadband wireless networks - [Message from the Editor-in-Chief]

    Page(s): 2 - 3
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    Freely Available from IEEE
  • Spectrum inventory issues

    Page(s): 4 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (714 KB) |  | HTML iconHTML  

    In the United States the issue of a "spectrum inventory" is of much current interest. A bill has been introduced in Congress, S. 649 (http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=111_cong_bills&docid=f:s649is.txt.pdf), that would require both U.S. spectrum regulators, the National Telecommunications and Information Administration/NTIA (for federal government spectrum users) and Federal Communications Commission/FCC (for all other spectrum users) to complete a "radio spectrum inventory" within 180 days. In this column we discuss the potential implications of such legislation. It is hoped that such a spectrum inventory will ultimately result in new spectrum for commercial applications. Since spectrum is a key raw ingredient for wireless systems, this could spur both technical innovation and the provision of new wireless services to the public. Finally, since telecommunications systems are themselves a key economic infrastructure, new and improved services could make existing users more efficient and competitive, as well as open the door to the creation of new businesses that use wireless services to offer nontelecommunications products and services (as Amazon uses the Internet). View full abstract»

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  • Scanning the literature

    Page(s): 6 - 7
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    Freely Available from IEEE
  • Untethered clouds

    Page(s): 8 - 10
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (144 KB) |  | HTML iconHTML  

    Welcome to this first issue on Industry Perspectives, a section dedicated to broad impact articles that aim to bridge the gap between academic research and emerging industry applications. In this issue, we showcase two articles. The usefulness of cloud computing as a virtualized Internet resource has been well documented. The first article by Jan Kruys describes how wireless technologies such as WiFi, WiMax/LTE, and Wi-Fibre can expand the reach of this resource, and enable pervasive on demand computing. The second article by Nada Golmie focuses on the key functionalities for achieving seamless mobility in wireless networks, and explains why deployment challenges remain even though standards and solutions are available. I hope these articles help shed some light on real-world problems that may, in turn, spawn new research topics. I take this opportunity to thank the authors for their fine efforts and to invite potential contributors for future sections. View full abstract»

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  • Seamless mobility: are we there yet?

    Page(s): 12 - 13
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    Seamless mobility is the ability for users to remain connected while roaming across different networks. This paper analyses the issues involved in general mobility scenario for seamless mobility and presents the challenges, solutions and opportunities in achieving seamless mobility. View full abstract»

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  • Service-oriented broadband wireless network architecture [Guest Editorial]

    Page(s): 14 - 15
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    Freely Available from IEEE
  • Security in service-oriented vehicular networks

    Page(s): 16 - 22
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (744 KB) |  | HTML iconHTML  

    Service-oriented vehicular networks support diverse infrastructure-based commercial services including Internet access, real-time traffic concerns, video streaming, and content distribution. The success of service delivery in vehicular networks depends on the underlying communication system to enable the user devices to connect to a large number of communicating peers and even to the Internet. This poses many new research challenges, especially in the aspects of security, user privacy, and billing. In this article we first identify the key requirements of authentication, privacy preservation, and billing for service delivery in vehicular networks. We then review the existing industrial and academic efforts on service- oriented vehicular networks. We also point out two security challenges, minimizing vehicleto- infrastructure authentication latency and distributed public key revocation, which are considered among the most challenging design objectives in service-oriented vehicular networks. A novel fast vehicle-to-infrastructure authentication based on a vehicle mobility prediction scheme and an infrastructure-based short-time certificate management scheme are then proposed to address these two challenges. View full abstract»

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  • Multipath routing for multiple description video communications over wireless mesh networks

    Page(s): 24 - 30
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (250 KB) |  | HTML iconHTML  

    During the past few years, wireless mesh networks have drawn significant attention from academia and industry as a fast, easy, and inexpensive solution for broadband wireless access. In WMNs it is important to support video communications in an efficient way. To address this issue, this article studies the multipath routing for multiple description video delivery over IEEE 802.11-based WMNs. Specifically, we first design a framework to transmit MD video over WMNs through multiple paths. We then investigate the technical challenges encountered in the framework. To overcome these challenges, we develop an enhanced version of a guaranteed rate packet scheduling algorithm, virtual reserved rate GR, to shorten the packet delay of video communications in multiservice network environments. Our simulation study shows that the proposed approach can reduce the latency of video delivery and achieve good performance of traffic engineering across a WMN. View full abstract»

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  • Using P2P overlays to provide QoS in service-oriented wireless networks

    Page(s): 32 - 38
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (232 KB) |  | HTML iconHTML  

    An increasing number of applications require some form of guarantees from the network, in terms of bandwidth or access and transfer delay. This demand for quality of service can be met by means of different mechanisms, depending on the networks being traversed, as well as the degree of integration of the services with the communication infrastructure. Whereas end-to-end QoS provision is still an open problem, several possibilities now exist in local environments. The article investigates the capabilities offered by a P2P overlay for distributed bandwidth management in a controlled ad hoc deployment, to support specific requirements in service-oriented wireless networks. The mechanism proposed allows complementing the core functionalities of the IEEE 802.11e protocol, and enhancing them to handle local mobility and dynamic requests for bandwidth. The performance evaluation is provided in an emulated environment to show the effectiveness of the presented approach. View full abstract»

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  • Network-coding-based scheduling and routing schemes for service-oriented wireless mesh networks

    Page(s): 40 - 46
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (279 KB) |  | HTML iconHTML  

    Service-oriented wireless mesh networks have recently been receiving intensive attention as a pivotal component to implement the concept of ubiquitous computing due to their easy and cost-effective deployment. To deliver a variety of services to subscriber stations, a large volume of traffic is exchanged via mesh routers in the mesh backbone network. One of the critical problems in service-oriented wireless mesh networks is to improve the network throughput. Wireless network coding is a key technology to improve network throughput in multihop wireless networks since it can exploit not only the broadcast nature of the wireless channel, but also the native physical-layer coding ability by mixing simultaneously arriving radio waves at relay nodes. We first analyze the throughput improvement obtained by wireless network coding schemes in wireless mesh networks. Then we develop a heuristic joint link scheduling, channel assignment, and routing algorithm that can improve the network throughput for service-oriented wireless mesh networks. Our extensive simulations show that wireless network coding schemes can improve network throughput by 34 percent. View full abstract»

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  • A quality-driven decision engine for live video transmission under service-oriented architecture

    Page(s): 48 - 54
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1097 KB) |  | HTML iconHTML  

    Service-oriented architecture provides a solution to the increasing network complexity due to ever-growing heterogeneous networks. As the most significant component of SOA, the decision engine is to create a workflow, defined as a sequence of individual data processing entities, for providing end-to-end QoS of a given task. Although the workflow of video transmission is generally known, existing solutions are often monolithic. Furthermore, there is no decision engine to select a workflow based on the best user-perceived quality. In this article we propose a service-oriented decision engine framework, which consists of a decision engine, a performance evaluation component, and other major SOA components to support real-time video transmission over wireless multihop networks, aiming to provide the best user-perceived video quality under application-centric QoS constraints. Based on the investigation of the state of- the-art research efforts on SOA, some key issues for wireless live video transmission are discussed, and a case study for live video transmission is given to illustrate the proposed scheme. The superior performance of the proposed service-oriented decision engine is validated by experimental results. View full abstract»

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  • Dynamic composition of services for end-to-end information transport

    Page(s): 56 - 62
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (199 KB) |  | HTML iconHTML  

    An increasing number of communication technologies in access and core segments of the network belonging to different providers and subject to different network design criteria are making networks complex and difficult to manage. In such networks it is also more difficult to guarantee requested levels of quality of service. Service oriented design can be the answer to problems facing the providers of services for information transport. In this article we propose an end-to-end service composition for information transport based on principles from service oriented architecture (i.e., dynamically composing transport services with characteristics matching the requirements of a given application). SOA principles are similar to those behind the division of labor, and therefore should give providers incentive to adopt them to make better use of resources and increase revenue. As we show, some SOA concepts are similar to concepts in the open systems interconnection reference model, with the key advantages of dynamism and flexibility. We discuss service oriented networks based on transport service composition across access and core segments, and describe access network selection for online gaming. In particular, we show how semantic technologies can be used for layer 2 queries and discuss the advantages of using knowledge bases over traditional approaches. View full abstract»

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  • Topology control for service-oriented wireless mesh networks

    Page(s): 64 - 71
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (334 KB) |  | HTML iconHTML  

    Topology control is one of the most critical design issues in multihop wireless networks. Topology control has been investigated extensively in the literature. Nevertheless, it is noted that most existing studies do not consider the requirements on upper layer applications or services. In this article we address the topology control issues on service-oriented wireless mesh networks. In particular, we provide a comprehensive survey of existing works on topology control from a service- oriented perspective. We then propose a general framework for topology control in service- oriented WMNs. To demonstrate the effectiveness of the framework, we conduct a case study in which the main objective is to maximize the overall throughput in a network with random unicast traffic. The performance of this topology control scheme is evaluated by numerical results. In addition, it is illustrated that the generated topology can support advanced technologies, including network coding and physical-layer network coding, which can significantly improve the throughput capacity of a network. View full abstract»

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  • Downlink scheduling for multimedia multicast/broadcast over mobile wimax: connection-oriented multistate adaptation

    Page(s): 72 - 79
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (356 KB) |  | HTML iconHTML  

    With its comprehensive QoS support and ubiquitous coverage, the mobile WiMAX network offers promising opportunities for unwiring the last mile connectivity to Internet. However, stringent QoS demands of multimedia applications entail studies on service-oriented radio resource management. This article systematically examines the design issues and the state of the art of multimedia downlink scheduling in the multicast/broadcast-based WiMAX system. We propose a viable end-to-end framework, connection-oriented multistate adaptation, by considering cross-layer adaptations in source coding, queue prioritization, flow queuing, and scheduling. Its performance is confirmed by simulations on important metrics, showing that the framework can effectively accommodate heterogeneity in link variations, queue fluctuations, and reception diversities. View full abstract»

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  • Security, privacy, and accountability in wireless access networks

    Page(s): 80 - 87
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (724 KB) |  | HTML iconHTML  

    The presence of ubiquitous connectivity provided by wireless communications and mobile computing has changed the way humans interact with information. At the same time, it has made communication security and privacy a hot-button issue. In this article we address the security and privacy concerns in wireless access networks. We first discuss the general cryptographic means to design privacy-preserving security protocols, where the dilemma of attaining both security and privacy goals, especially user accountability vs. user privacy, is highlighted. We then present a novel authentication framework that integrates a new key management scheme based on the principle of separation of powers and an adapted construction of Boneh and Shacham's group signature scheme, as an enhanced resort to simultaneously achieve security, privacy, and accountability in wireless access networks. View full abstract»

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  • Wake-up receivers for wireless sensor networks: benefits and challenges

    Page(s): 88 - 96
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (197 KB) |  | HTML iconHTML  

    For successful data delivery, the destination nodes should be listening to the medium to receive data when the sender node starts data communication. To achieve this synchronization, there are different rendezvous schemes, among which the most energy-efficient is utilizing wakeup receivers. Current hardware technologies of wake-up receivers enable us to evaluate them as a promising solution for wireless sensor networks. In this article the benefits achieved with wake-up receivers are investigated along with the challenges observed. In addition, an overview of state-of-the-art hardware and networking protocol proposals is presented. As wake-up receivers offer new opportunities, new potential application areas are also presented and discussed. View full abstract»

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Aims & Scope

IEEE Wireless Communications Magazine deals with all technical and policy issues related to personalization, location-independent communications in all media.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Hsiao-Hwa Chen
Cheng Kung University, Taiwan