Gotowe bibliografie tematyczne / 3rd generation wireless networks

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Gotowa bibliografia na temat „3rd generation wireless networks”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 1 lutego 2022

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Artykuły w czasopismach na temat "3rd generation wireless networks"

Geng-Sheng Kuo, A. Mishra i R. Prasad. "QoS and resource allocation in the 3rd-generation wireless networks [Guest Editorial]". IEEE Communications Magazine 39, nr 2 (luty 2001): 115. http://dx.doi.org/10.1109/mcom.2001.900639.

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Marzook, Ali, Hayder Mohammed i Hisham Roomi. "Performance of Non-Orthogonal Multiple Access (NOMA) with Successive Interference Cancellation (SIC)". 3D SCEEER Conference sceeer, nr 3d (1.07.2020): 152–56. http://dx.doi.org/10.37917/ijeee.sceeer.3rd.21.

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Non-Orthogonal Multiple Access (NOMA) has been promised for fifth generation (5G) cellular wireless network that can serve multiple users at same radio resources time, frequency, and code domains with different power levels. In this paper, we present a new simulation compression between a random location of multiple users for Non-Orthogonal Multiple Access (NOMA) and Orthogonal Multiple Access (OMA) that depend on Successive Interference Cancellation (SIC) and generalized the suggested joint user pairing for NOMA and beyond cellular networks. Cell throughput and Energy Efficiency (EE) are gained are developed for all active NOMA user in suggested model. Simulation results clarify the cell throughput for NOMA gained 7 Mpbs over OMA system in two different scenarios deployed users (3 and 4). We gain an attains Energy Efficiency (EE) among the weak power users and the stronger power users.

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Kang, Yoohwa, Changki Kim, Donghyeok An i Hyunsoo Yoon. "Multipath transmission control protocol–based multi-access traffic steering solution for 5G multimedia-centric network: Design and testbed system implementation". International Journal of Distributed Sensor Networks 16, nr 2 (luty 2020): 155014772090975. http://dx.doi.org/10.1177/1550147720909759.

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Various technologies have been developed for the efficient use of the multiple radio access technologies resource at the radio access network level or other network levels to improve user service quality in mobile communication networks. In long-term evolution, mobile carriers are commercializing radio access network-level traffic aggregation technologies such as licensed-assisted access-long-term evolution, long-term evolution-unlicensed, and long-term evolution-wireless local area network aggregation, which use the multi-accesses of the 3rd Generation Partnership Project and WiFi, and the multipath transmission control protocol–based traffic aggregation technologies at the L3 network level. The standardization of 3rd Generation Partnership Project Release 16, which is scheduled to be completed by 2020, is under progress to support the traffic aggregation technology at the L3 network level through a multi-access 5G network. Multipath transmission control protocol is also considered as a traffic aggregation technology. However, it is difficult to apply the multipath transmission control protocol employment model used in long-term evolution to the 5G network structure as it is due to the change to a common core architecture that accommodates multiple radio access technologies through one common interface. Therefore, this article proposes an optimal 5G system architecture and a multipath transmission control protocol adaptation method to support the access traffic steering function based on multipath transmission control protocol in a 3rd Generation Partnership Project 5G mobile communication network. We have verified the development of the multipath transmission control protocol–based multi-access traffic steering technology by implementing the proposed solution in a commercial server on a testbed based on the 5G system standard of 3rd Generation Partnership Project Release 15. Furthermore, this article defines problems that occur when implementing the multipath transmission control protocol–based multi-access traffic steering system and proposes relevant solutions. Based on the implementation results, it is demonstrated that the proposed multipath transmission control protocol–based multi-access traffic steering system can perform traffic steering in the 3rd Generation Partnership Project 5G network.

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XYNOGALAS, STAVROS, IOANNA ROUSSAKI, MARIA CHANTZARA i MILTIADES ANAGNOSTOU. "CONTEXT MANAGEMENT IN VIRTUAL HOME ENVIRONMENT SYSTEMS". Journal of Circuits, Systems and Computers 13, nr 02 (kwiecień 2004): 293–311. http://dx.doi.org/10.1142/s021812660400143x.

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The emerging 3rd generation services are provided through various types of networks and terminals. Roaming users rely on new kinds of wireless networks and terminals to offer mobility and make services available everywhere. The users' requirement for continuous access to personalized services from any place, transparently and independently of the underlying network technology and the terminal or point of access, was satisfied by the first VHE prototypes. The challenge in service engineering is now to make these services smarter by adding context management capabilities to them. In this paper we propose an enhanced framework for efficient context management in a VHE environment.

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Moon, Jihun, i Yujin Lim. "A Reinforcement Learning Approach to Access Management in Wireless Cellular Networks". Wireless Communications and Mobile Computing 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/6474768.

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In smart city applications, huge numbers of devices need to be connected in an autonomous manner. 3rd Generation Partnership Project (3GPP) specifies that Machine Type Communication (MTC) should be used to handle data transmission among a large number of devices. However, the data transmission rates are highly variable, and this brings about a congestion problem. To tackle this problem, the use of Access Class Barring (ACB) is recommended to restrict the number of access attempts allowed in data transmission by utilizing strategic parameters. In this paper, we model the problem of determining the strategic parameters with a reinforcement learning algorithm. In our model, the system evolves to minimize both the collision rate and the access delay. The experimental results show that our scheme improves system performance in terms of the access success rate, the failure rate, the collision rate, and the access delay.

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Celentano, Domenico, Antonio Fresa, Maurizio Longo, Fabio Postiglione i Anton Luca Robustelli. "Secure Mobile IPv6 for Mobile Networks based on the 3GPP IP Multimedia Subsystem". Journal of Communications Software and Systems 3, nr 2 (21.06.2007): 90. http://dx.doi.org/10.24138/jcomss.v3i2.257.

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The rapid spread of new radio access technologies and the consequent service opportunities have stimulated thetechnical and scientific community to investigate future evolution scenarios for 3rd Generation networks (3G), generically referred to as Beyond-3G or 4G. They are going to be characterized by ever stronger requirements for security, as well as the capability for the final users to experience continuous connectivity and uninterrupted services of IP applications as they move about from one access network to another. Key issues are: i) securityprovision for applications exchanging data in diverse wireless networks; ii) seamless mobility (handoff) between different coverage domains and, in case, access technologies. Since many proposals are based on the use of the Mobile IPv6 protocol, in this paper we analyze the security threats emerging from some Mobile IPv6 mechanisms for mobility management, and we propose a solution against such threats, under the assumption that both end users (mobile or not) are attached to a Mobile IPv6-enabled 3GPP IP Multimedia Subsystem network.

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Prakash, Monika, i Atef Abdrabou. "On the Fidelity of NS-3 Simulations of Wireless Multipath TCP Connections". Sensors 20, nr 24 (18.12.2020): 7289. http://dx.doi.org/10.3390/s20247289.

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The multipath transmission control protocol (MPTCP) is considered a promising wireless multihoming solution, and the 3rd generation partnership project (3GPP) includes it as a standard feature in the fifth-generation (5G) networks. Currently, ns-3 (Network Simulator-3) is widely used to evaluate the performance of wireless networks and protocols, including the emerging MPTCP protocol. This paper investigates the fidelity of the Linux kernel implementation of MPTCP in the ns-3 direct code execution module. The fidelity of MPTCP simulation is tested by comparing its performance with a real Linux stack implementation of MPTCP using a hardware testbed for two different setups. One setup emulates the existence of a bottleneck link between the sending and receiving networks, whereas the other setup does not have such a bottleneck. The fidelity of ns-3’s simulation is tested for four congestion control algorithms, namely Cubic, linked-increases algorithm (LIA), opportunistic LIA (OLIA) and wVegas for relatively short and long data flows. It is found that the uplink MPTCP throughput performance exhibited by the ns-3 simulator matches the hardware testbed results only if the flows are long-lived and share no common bottleneck link. Likewise, the MPTCP throughput achieved during a downlink scenario using the ns-3 simulator and the hardware testbed are close to each other across all algorithms except wVegas regardless of the flow size if there is no bottleneck link. Moreover, it is observed that the impact of LTE handover on MPTCP throughput is less significant in the simulator than the real hardware testbed, and it is setup-dependent.

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Lin, Ling, i Antonio Liotta. "Presence in the IP Multimedia Subsystem". Mobile Information Systems 3, nr 3-4 (2007): 187–202. http://dx.doi.org/10.1155/2007/758738.

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With an ever increasing penetration of Internet Protocol (IP) technologies, the wireless industry is evolving the mobile core network towards all-IP network. The IP Multimedia Subsystem (IMS) is a standardised Next Generation Network (NGN) architectural framework defined by the 3rd Generation Partnership Project (3GPP) to bridge the gap between circuit-switched and packet-switched networks and consolidate both sides into on single all-IP network for all services. In this paper, we provide an insight into the limitation of the presence service, one of the fundamental building blocks of the IMS. Our prototype-based study is unique of its kind and helps identifying the factors which limit the scalability of the current version of the presence service (3GPP TS 23.141 version 7.2.0 Release 7 [1]), which will in turn dramatically limit the performance of advanced IMS services. We argue that the client-server paradigm behind the current IMS architecture does not suite the requirements of the IMS system, which defies the very purpose of its introduction. We finally elaborate on possible avenues for addressing this problem.

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Saafi, Salwa, Jiri Hosek i Aneta Kolackova. "Enabling Next-Generation Public Safety Operations with Mission-Critical Networks and Wearable Applications". Sensors 21, nr 17 (28.08.2021): 5790. http://dx.doi.org/10.3390/s21175790.

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Public safety agencies have been working on the modernization of their communication networks and the enhancement of their mission-critical capabilities with novel technologies and applications. As part of these efforts, migrating from traditional land mobile radio (LMR) systems toward cellular-enabled, next-generation, mission-critical networks is at the top of these agencies’ agendas. In this paper, we provide an overview of cellular technologies ratified by the 3rd Generation Partnership Project (3GPP) to enable next-generation public safety networks. On top of using wireless communication technologies, emergency first responders need to be equipped with advanced devices to develop situational awareness. Therefore, we introduce the concept of the Internet of Life-Saving Things (IoLST) and focus on the role of wearable devices—more precisely, cellular-enabled wearables, in creating new solutions for enhanced public safety operations. Finally, we conduct a performance evaluation of wearable-based, mission-critical applications. So far, most of the mission-critical service evaluations target latency performance without taking into account reliability requirements. In our evaluation, we examine the impact of device- and application-related parameters on the latency and the reliability performance. We also identify major future considerations for better support of the studied requirements in next-generation public safety networks.

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Dilli, Ravilla. "Performance analysis of multi user massive MIMO hybrid beamforming systems at millimeter wave frequency bands". Wireless Networks 27, nr 3 (4.02.2021): 1925–39. http://dx.doi.org/10.1007/s11276-021-02546-w.

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AbstractMillimeter-wave (mmWave) and massive multi-input–multi-output (mMIMO) communications are the most key enabling technologies for next generation wireless networks to have large available spectrum and throughput. mMIMO is a promising technique for increasing the spectral efficiency of wireless networks, by deploying large antenna arrays at the base station (BS) and perform coherent transceiver processing. Implementation of mMIMO systems at mmWave frequencies resolve the issue of high path-loss by providing higher antenna gains. The motivation for this research work is that mmWave and mMIMO operations will be much more popular in 5G NR, considering the wide deployment of mMIMO in major frequency bands as per 3rd generation partnership project. In this paper, a downlink multi-user mMIMO (MU-mMIMO) hybrid beamforming communication system is designed with multiple independent data streams per user and accurate channel state information. It emphasizes the hybrid precoding at transmitter and combining at receiver of a mmWave MU-mMIMO hybrid beamforming system. Results of this research work give the tradeoff between multiple data streams per user and required number of BS antennas. It strongly recommends for higher number of parallel data streams per user in a mmWave MU-mMIMO systems to achieve higher order throughputs.

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Rozprawy doktorskie na temat "3rd generation wireless networks"

Venkatachalaiah, Suresh, i suresh@catt rmit edu au. "Mobility prediction and Multicasting in Wireless Networks: Performance and Analysis". RMIT University. Electrical and Computer Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070301.130037.

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Handoff is a call handling mechanism that is invoked when a mobile node moves from one cell to another. Such movement may lead to degradation in performance for wireless networks as a result of packet losses. A promising technique proposed in this thesis is to apply multicasting techniques aided by mobility prediction in order to improve handoff performance. In this thesis, we present a method that uses a Grey model for mobility prediction and a fuzzy logic controller that has been fine-tuned using evolutionary algorithms in order to improve prediction accuracy. We also compare the self-tuning algorithm with two evolutionary algorithms in terms of accuracy and their convergence times. Our proposed method takes into account signal strengths from the base stations and predicts the signal strength of the next candidate base station in order to provide improved handover performance. The primary decision for mobility prediction is the accurate prediction of signal strengths obtained from the base stations and remove any unwanted errors in the prediction using suitable optimisation techniques. Furthermore, the model includes the procedures of fine-tuning the predicted data using fuzzy parameters. We also propose suitable multicasting algorithms to minimise the reservation of overall network resource requirements during handoff with the mobility prediction information. To be able to efficiently solve the problem, the situation is modelled using a multicast tree that is defined to maintain connectivity with the mobile node, whilst ensuring bandwidth guarantees and a minimum hop-count. In this approach, we have tried to solve the problem by balancing two objectives through putting a weight on each of two costs. We provide a detailed description of an algorithm to implement join and prune mechanisms, which will help to build an optimal multicast tree with QoS requirements during handoff as well as incorporating dynamic changes in the positions of mobile nodes. An analysis of how mobility prediction helps in the selection of potential Access Routers (AR) with QoS requirements - which affects the multicast group size and bandwidth cost of the multicast tree -- is presented. The proposed technique tries to minimise the number of multicast tree join and prune operations. Our results show that the expected size of the multicast group increases linearly with an increase in the number of selected destination AR's for multicast during handoff. We observe that the expected number of joins and prunes from the multicast tree increases with group size. A special simulation model was developed to demonstrate both homogeneous and heterogeneous handoff which is an emerging requirement for fourth generation mobile networks. The model incorporates our mobility prediction model for heterogeneous handoff between the Wireless LAN and a cellular network. The results presented in this thesis for mobility prediction, multicasting techniques and heterogeneous handoff include proposed algorithms and models which aid in the understanding, analysing and reducing of overheads during handoff.

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Shafin, Rubayet. "3D Massive MIMO and Artificial Intelligence for Next Generation Wireless Networks". Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/97633.

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3-dimensional (3D) massive multiple-input-multiple-output (MIMO)/full dimensional (FD) MIMO and application of artificial intelligence are two main driving forces for next generation wireless systems. This dissertation focuses on aspects of channel estimation and precoding for 3D massive MIMO systems and application of deep reinforcement learning (DRL) for MIMO broadcast beam synthesis. To be specific, downlink (DL) precoding and power allocation strategies are identified for a time-division-duplex (TDD) multi-cell multi-user massive FD-MIMO network. Utilizing channel reciprocity, DL channel state information (CSI) feedback is eliminated and the DL multi-user MIMO precoding is linked to the uplink (UL) direction of arrival (DoA) estimation through estimation of signal parameters via rotational invariance technique (ESPRIT). Assuming non-orthogonal/non-ideal spreading sequences of the UL pilots, the performance of the UL DoA estimation is analytically characterized and the characterized DoA estimation error is incorporated into the corresponding DL precoding and power allocation strategy. Simulation results verify the accuracy of our analytical characterization of the DoA estimation and demonstrate that the introduced multi-user MIMO precoding and power allocation strategy outperforms existing zero-forcing based massive MIMO strategies. In 3D massive MIMO systems, especially in TDD mode, a base station (BS) relies on the uplink sounding signals from mobile stations to obtain the spatial information for downlink MIMO processing. Accordingly, multi-dimensional parameter estimation of MIMO channel becomes crucial for such systems to realize the predicted capacity gains. In this work, we also study the joint estimation of elevation and azimuth angles as well as the delay parameters for 3D massive MIMO orthogonal frequency division multiplexing (OFDM) systems under a parametric channel modeling. We introduce a matrix-based joint parameter estimation method, and analytically characterize its performance for massive MIMO OFDM systems. Results show that antenna array configuration at the BS plays a critical role in determining the underlying channel estimation performance, and the characterized MSEs match well with the simulated ones. Also, the joint parametric channel estimation outperforms the MMSEbased channel estimation in terms of the correlation between the estimated channel and the real channel. Beamforming in MIMO systems is one of the key technologies for modern wireless communication. Creating wide common beams are essential for enhancing the coverage of cellular network and for improving the broadcast operation for control signals. However, in order to maximize the coverage, patterns for broadcast beams need to be adapted based on the users' movement over time. In this dissertation, we present a MIMO broadcast beam optimization framework using deep reinforcement learning. Our proposed solution can autonomously and dynamically adapt the MIMO broadcast beam parameters based on user' distribution in the network. Extensive simulation results show that the introduced algorithm can achieve the optimal coverage, and converge to the oracle solution for both single cell and multiple cell environment and for both periodic and Markov mobility patterns.
Doctor of Philosophy
Multiple-input-multiple-output (MIMO) is a technology where a transmitter with multiple antennas communicates with one or multipe receivers having multiple antennas. 3- dimensional (3D) massive MIMO is a recently developed technology where a base station (BS) or cell tower with a large number of antennas placed in a two dimensional array communicates with hundreds of user terminals simultaneously. 3D massive MIMO/full dimensional (FD) MIMO and application of artificial intelligence are two main driving forces for next generation wireless systems. This dissertation focuses on aspects of channel estimation and precoding for 3D massive MIMO systems and application of deep reinforcement learning (DRL) for MIMO broadcast beam synthesis. To be specific, downlink (DL) precoding and power allocation strategies are identified for a time-division-duplex (TDD) multi-cell multi-user massive FD-MIMO network. Utilizing channel reciprocity, DL channel state information (CSI) feedback is eliminated and the DL multi-user MIMO precoding is linked to the uplink (UL) direction of arrival (DoA) estimation through estimation of signal parameters via rotational invariance technique (ESPRIT). Assuming non-orthogonal/non-ideal spreading sequences of the UL pilots, the performance of the UL DoA estimation is analytically characterized and the characterized DoA estimation error is incorporated into the corresponding DL precoding and power allocation strategy. Simulation results verify the accuracy of our analytical characterization of the DoA estimation and demonstrate that the introduced multi-user MIMO precoding and power allocation strategy outperforms existing zero-forcing based massive MIMO strategies. In 3D massive MIMO systems, especially in TDD mode, a BS relies on the uplink sounding signals from mobile stations to obtain the spatial information for downlink MIMO processing. Accordingly, multi-dimensional parameter estimation of MIMO channel becomes crucial for such systems to realize the predicted capacity gains. In this work, we also study the joint estimation of elevation and azimuth angles as well as the delay parameters for 3D massive MIMO orthogonal frequency division multiplexing (OFDM) systems under a parametric channel modeling. We introduce a matrix-based joint parameter estimation method, and analytically characterize its performance for massive MIMO OFDM systems. Results show that antenna array configuration at the BS plays a critical role in determining the underlying channel estimation performance, and the characterized MSEs match well with the simulated ones. Also, the joint parametric channel estimation outperforms the MMSE-based channel estimation in terms of the correlation between the estimated channel and the real channel. Beamforming in MIMO systems is one of the key technologies for modern wireless communication. Creating wide common beams are essential for enhancing the coverage of cellular network and for improving the broadcast operation for control signals. However, in order to maximize the coverage, patterns for broadcast beams need to be adapted based on the users' movement over time. In this dissertation, we present a MIMO broadcast beam optimization framework using deep reinforcement learning. Our proposed solution can autonomously and dynamically adapt the MIMO broadcast beam parameters based on user' distribution in the network. Extensive simulation results show that the introduced algorithm can achieve the optimal coverage, and converge to the oracle solution for both single cell and multiple cell environment and for both periodic and Markov mobility patterns.

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Nordio, Alessandro. "Advanced signal processing algorithms for 3rd generation wireless mobile systems /". [S.l.] : [s.n.], 2002. http://library.epfl.ch/theses/?nr=2550.

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Yew, Alvin. "Policy-based management of context-aware services in 3rd Generation mobile networks". Thesis, University of Surrey, 2007. http://epubs.surrey.ac.uk/843082/.

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Current 3rd Generation (3G) mobile networks have the ability to deploy and offer context- aware services. 3G service frameworks such as the Open Service Access and the Location Service provide context-aware services easy access to the user's context. Service adaptation is fundamental to context-aware service provisioning and to the realisation of the Virtual Home Environment concept, which is now an integral part of the 3G service framework. The additional complexity in service adaptation inherent in context-aware services, however, requires a powerful and appropriate management framework to control service behaviour. Policy-based management, a proven solution in the network management field, is an appropriate framework to manage adaptable context-aware services as it reduces complexity through a rule-based approach of mapping events and conditions to management actions to achieve management goals. 3GPP has incorporated a policy management interface in the OSA specifications but has not provided any mappings or bindings to the underlying 3G network to achieve its realisation. This thesis proposes a framework that realizes the OSA policy management API while maintaining strict compliance to the plethora of 3G specifications regarding the underlying 3G network. It explores the various operating requirements for deploying the policy-based management framework including the various 3G business models, the VHE concept, and the context-aware service adaptation requirements. Solutions to managing and enforcing multi-dimensional context-aware service adaptation are also presented in this thesis. A policy information model to aid the creation of context-aware service adaptation policies was designed and developed with strict compliance to the various 3G specifications. A prototype of the framework was implemented as a proof of concept and its evaluation is provided with an empirical analysis of its performance.

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Shepstone, Sven E. "AAL2 switching node to support voice services in 3rd and 4th generation networks". Master's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/9773.

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Includes bibliographical references.
The research community and industry alike have, over the past decade, been showing considerable interest in packet-switching networks to support voice services as well as data services. A technology that was standardised to accommodate these delay-sensitive requirements is Asynchronous Transfer Mode (ATM), which deals particularly well at transporting uncompressed voice and data. However, due to the exponential increase in wireless applications and their supporting access technologies, a need has arisen for an infrastructure in the wide area network to support and maintain the QoS requirements of low-bit rate, compressed voice. An adaptation layer known as AAL2 was re-standardised to support these specialised voice services. However, a severe side-effect of using AAL2 with traditional ATM switches results in inefficient routing and waste-age of resources. In this study, a design for an AAL2 switching node will be proposed to address the above-mentioned issues. The design is comprised of modules that perform the following functions: Buffering, payload interrogation, protocol translations, packet classification, packet re- routing, timing, scheduling and support for signalling and management interfacing. The supporting architecture is targeted towards an embedded >286-based computing system, which itself is overlaid upon one or several ports of a high-speed, research-oriented ATM switch, known as the Washington University Gigabit Switch (WUGS). In order to evaluate the operation and performance of the AAL2 switch architecture, a testbed is proposed and implemented, comprising the AAL2 switch at the core, with a supporting infrastructure to emulate the generation and analysis of low bit-rate voice traffic over an AAL2 connection. By conducting a set of experiments, a series of operational and performance results will be presented. Particular focus will be placed on the performance and efficiency of the AAL2 layer over ATM, as well as the ability of the switch to route packets from multiple sources to a set of output connections in the correct manner.

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Velayutham, Aravind Murugesan. "Transport Protocols for Next Generation Wireless Data Networks". Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6957.

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Emerging wireless networks are characterized by increased heterogeneity in wireless access technologies as well as increased peer-to-peer communication among wireless hosts. The heterogeneity among wireless access interfaces mainly exists because of the fact that different wireless technologies deliver different performance trade-offs. Further, more and more infrastructure-less wireless networks such as ad-hoc networks are emerging to address several application scenarios including military and disaster recovery. These infrastructure-less wireless networks are characterized by the peer-to-peer communication model. In this thesis, we propose transport protocols that tackle the challenges that arise due to the above-mentioned properties of state-of-the-art wireless data networks. The main contributions of this work are as follows: 1. We determine the ideal nature and granularity of transport adaptation for efficient operation in heterogeneous wireless data networks by performing comprehensive experimental analysis. We then design and implement a runtime adaptive transport framework, *TP, which accommodates the capabilities of the ideal transport adaptation solution. 2. We prove that conversational transport protocols are not efficient under peer-to-peer wireless data networks. We then design and implement NCTP which is a non-conversational transport protocol.

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Wang, Qi. "Mobility support architectures for next-generation wireless networks". Thesis, University of Plymouth, 2006. http://hdl.handle.net/10026.1/2078.

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With the convergence of the wireless networks and the Internet and the booming demand for multimedia applications, the next-generation (beyond the third generation, or B3G) wireless systems are expected to be all IP-based and provide real-time and non-real-time mobile services anywhere and anytime. Powerful and efficient mobility support is thus the key enabler to fulfil such an attractive vision by supporting various mobility scenarios. This thesis contributes to this interesting while challenging topic. After a literature review on mobility support architectures and protocols, the thesis starts presenting our contributions with a generic multi-layer mobility support framework, which provides a general approach to meet the challenges of handling comprehensive mobility issues. The cross-layer design methodology is introduced to coordinate the protocol layers for optimised system design. Particularly, a flexible and efficient cross-layer signalling scheme is proposed for interlayer interactions. The proposed generic framework is then narrowed down with several fundamental building blocks identified to be focused on as follows. As widely adopted, we assume that the IP-based access networks are organised into administrative domains, which are inter-connected through a global IP-based wired core network. For a mobile user who roams from one domain to another, macro (inter-domain) mobility management should be in place for global location tracking and effective handoff support for both real-time and non-real-lime applications. Mobile IP (MIP) and the Session Initiation Protocol (SIP) are being adopted as the two dominant standard-based macro-mobility architectures, each of which has mobility entities and messages in its own right. The work explores the joint optimisations and interactions of MIP and SIP when utilising the complementary power of both protocols. Two distinctive integrated MIP-SIP architectures are designed and evaluated, compared with their hybrid alternatives and other approaches. The overall analytical and simulation results shown significant performance improvements in terms of cost-efficiency, among other metrics. Subsequently, for the micro (intra-domain) mobility scenario where a mobile user moves across IP subnets within a domain, a micro mobility management architecture is needed to support fast handoffs and constrain signalling messaging loads incurred by intra-domain movements within the domain. The Hierarchical MIPv6 (HMIPv6) and the Fast Handovers for MIPv6 (FMIPv6) protocols are selected to fulfil the design requirements. The work proposes enhancements to these protocols and combines them in an optimised way. resulting in notably improved performances in contrast to a number of alternative approaches.

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Zhang, Shunqing. "Cooperative relay in the next generation wireless networks /". View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?ECED%202009%20ZHANGS.

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Arino, Perez Victor. "Efficient Key Generation and Distributionon Wireless Sensor Networks". Thesis, KTH, Kommunikationsnät, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-141493.

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Wireless Sensor Networks have become popular during the last years. The introduction ofIPv6 which broadened the address space available, IEEE802.15.4 and adaption layers such as6loWPAN have allowed the intercommunication of small devices. These networks are usefulin many scenarios such as civil monitoring, mining, battle eld operations, as well as consumerproducts. Hence, practical security solutions for the intercommunication must be provided,ensuring privacy, authenticity, integrity and data freshness. In most cases, WSN nodes arenot tamper-proof and have very limited available resources and capabilities which makes PKIcurrently not attractive for this environment. At the same time, key pre-distribution providetoo low security for most applications. Therefore, the communication bootstrapping or thekey generation and distribution problem is an important concern to be addressed with theadditional di culty of the constrained capabilities of WSN nodes. In this thesis, a solution tothis problem is described. It makes use of ECDH and the curve K-163 for key exchange, AESCCM-128 for symmetric encryption to lower the processing overhead and a partial challengesolving chain as well as a TAS to provide strong authentication. Several hash functions havebeen analysed as well as several random number generating approaches. At the same time, inorder to t the key generation and distribution algorithms together with the regular sensoroperation, code optimizations were carried out on the cryptographic library Relic-Toolkit,reducing the memory footprint in 4KB; code reductions on Contiki OS allowed it to run usingonly 18KB of ash; and the peripheral drivers developed for the CC430 reduced as well thecomputation time. The solution allows to generate and distribute the keys in situ and isproved to be resilient to most adversaries while taking into account scalability, portability,energy consumption and making it suitable for consumer applications.

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Nader, Gustavo. "Ultra Wideband Interference on Third-Generation Wireless Networks". Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/30046.

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As a license-exempt technology, Ultra Wideband (UWB) can be used for numerous commercial and military applications, including ranging, sensing, low-range networking and multimedia consumer products. In the networking and consumer fields, the technology is envisioned to reach the mass market, with a very high density of UWB devices per home and office. The technology is based on the concept of transmitting a signal with very low power spectral density (PSD), while occupying a very wide bandwidth. In principle, the low emissions mask protects incumbent systems operating in the same spectrum from being interfered with, while the wide bandwidth offers the possibility of high data rates, in excess of 250 Mbps. UWB has been regulated to operate in the 3.1 to 10.6 GHz portion of the spectrum, with an emissions mask for the lower and upper bands outside this range. The commercial wireless mobile services based on third generation (3G) networks occupy a portion of the spectrum in the 2 GHz band, falling under the UWB emissions mask. UWB and UMTS (Universal Mobile Telephone Systems) devices will coexist, sharing the same spectrum. In this research, we investigate the UWB-3G coexistence problem, analyzing the impact of UWB on UMTS networks. Firstly, we review the mathematical model of the UWB signal, its temporal and spectral properties. We then analyze and model the effects of the UWB signal on a narrowband receiver. Next, we characterize the response of the UMTS receiver to UWB interference, determining its statistical behavior, and establishing a model to replicate it. We continue by proposing a link level model that offers a first order quantitative estimate of the impact of a UWB interferer on a UMTS victim receiver, demonstrating the potentially harmful effect of UWB on the UMTS link. We elaborate on that initial evidence by proposing and implementing a practical systemlevel algorithm to realistically simulate the behavior of the UMTS network in the presence of multiple sources of UWB interference. We complete the research by performing UMTS system level simulations under various conditions of UWB interference, with the purpose of assessing its impact upon a typical UMTS network. We analyze the sensitivity of the main UWB parameters affecting UMTS performance, investigating the coverage and capacity performance aspects of the network. The proposed analysis methodology creates a framework to characterize the impact that mass-deployed UWB can have on the performance of a 3G system. The literature on UWB-3G coexistence is inconclusive, and even contradictory, as to the impact UWB can have on the performance of third-generation wireless networks. While some studies show that UWB can be highly detrimental to 3G networks, others have concluded that both systems can gracefully coexist. Through this study, we found that at the current emissions limits regulated for UWB, a mass uptake of this technology can negatively affect the performance of third-generation (3G) wireless networks. The quality of service experienced by a 3G user in close proximity to an active UWB device can be noticeably degraded, in the form of reduced coverage range, poor voice quality (for a voice call), lower data rates (for a data session) or, in a extreme situation, complete service blockage. As the ratio of UWB devices surrounding a 3G user grows, the degradation becomes increasingly more evident. We determined that in order for UWB tocoexist with 3G networks without causing any performance degradation, a minimum power backoff of 20 dB should be applied to the current emission limits.
Ph. D.

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Książki na temat "3rd generation wireless networks"

EURO-NGI Conference on Next Generation Internet Networks (3rd 2007 Trondheim, Norway). 2007 Next Generation Internet networks: 3rd EURO-NGI Conference on Next Generation Internet Networks : design and engineering for heterogeneity : NGI 2007, 21-23 May 2007, Trondheim, Norway. Piscataway, NJ: IEEE, 2007.

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Tekinay, Sirin. Next generation wireless networks. New York: Kluwer Academic Publishers, 2002.

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Harvey, Michael G. Wireless Next Generation Networks. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11903-8.

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Tekinay, Sirin, red. Next Generation Wireless Networks. Boston: Kluwer Academic Publishers, 2002. http://dx.doi.org/10.1007/b117132.

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Nanda, Sanjiv. Third Generation Wireless Information Networks. Boston, MA: Springer US, 1992.

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Nanda, Sanjiv, i David J. Goodman, red. Third Generation Wireless Information Networks. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-4012-0.

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Black, Uyless D. Second generation mobile and wireless networks. Upper Saddle River, NJ: Prentice Hall, 1999.

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Chen, Jyh-Cheng. IP-Based Next-Generation Wireless Networks. New York: John Wiley & Sons, Ltd., 2004.

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Chen, Hsiao-Hwa, i Mohsen Guizani. Next Generation Wireless Systems and Networks. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470024569.

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Ghafoor, Saim, Mubashir Husain Rehmani i Alan Davy. Next Generation Wireless Terahertz Communication Networks. New York: CRC Press, 2021. http://dx.doi.org/10.1201/9781003001140.

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Części książek na temat "3rd generation wireless networks"

Tomarchio, Orazio, Andrea Calvagna i Giuseppe Di Modica. "Virtual Home Environment for Multimedia Services in 3rd Generation Networks". W NETWORKING 2002: Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communications, 1221–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-47906-6_111.

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Filipe Santos, João, Carlos Rodrigues i João Paulo. "Mobility Management Experiments in Beyond 3rd Generation Wireless Networks Using Mobile IPv6". W Mobile Communications, 304–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/3-540-36555-9_32.

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Kumar, Sumit, Garimella Rama Murthy i Naveen Chilamkurti. "Cooperative Mesh Networks". W Next-Generation Wireless Technologies, 7–13. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5164-7_2.

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Manoj, B. S., Ramesh R. Rao i Michele Zorzi. "Architectures and Protocols for Next Generation Cognitive Networking". W Cognitive Wireless Networks, 271–84. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-5979-7_14.

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Abdo, Jacques Bou, Hakima Chaouchi i Jacques Demerjian. "Security in Emerging 4G Networks". W Next-Generation Wireless Technologies, 243–72. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5164-7_12.

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Misra, Sudip, Sujata Pal i Barun Kumar Saha. "Cooperation in Delay Tolerant Networks". W Next-Generation Wireless Technologies, 15–35. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5164-7_3.

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Zhong, Sheng, Hong Zhong, Xinyi Huang, Panlong Yang, Jin Shi, Lei Xie i Kun Wang. "Networking Cyber-Physical Systems: System Fundamentals of Security and Privacy for Next-Generation Wireless Networks". W Wireless Networks, 1–32. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01150-5_1.

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Zhong, Sheng, Hong Zhong, Xinyi Huang, Panlong Yang, Jin Shi, Lei Xie i Kun Wang. "Networking Cyber-Physical Systems: Algorithm Fundamentals of Security and Privacy for Next-Generation Wireless Networks". W Wireless Networks, 33–48. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01150-5_2.

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Shaikh, Faisal Karim, Sherali Zeadally i Farhan Siddiqui. "Energy Efficient Routing in Wireless Sensor Networks". W Next-Generation Wireless Technologies, 131–57. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5164-7_8.

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Chilamkurti, Naveen. "Trends and Challenges of the Emerging Wireless Networks". W Next-Generation Wireless Technologies, 3–5. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5164-7_1.

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Streszczenia konferencji na temat "3rd generation wireless networks"

Agrawal, Prathima, i David Famolari. "Mobile computing in next generation wireless networks". W the 3rd international workshop. New York, New York, USA: ACM Press, 1999. http://dx.doi.org/10.1145/313239.313277.

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Li, Yangzi, i Gengguo Cheng. "Fourth generation wireless communication network". W 2013 3rd International Conference on Consumer Electronics, Communications and Networks (CECNet). IEEE, 2013. http://dx.doi.org/10.1109/cecnet.2013.6703334.

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Lijie, Gao, i Chen Zhigang. "Security in Next-Generation Wireless Sensor Networks". W 3rd International Conference on Computer Science and Service System. Paris, France: Atlantis Press, 2014. http://dx.doi.org/10.2991/csss-14.2014.119.

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Akkari, Nadine, Samir Tohme i Mahmoud Doughan. "Toward A Seamless Mobility Mangement in Next Generation Networks". W 2006 3rd International Symposium on Wireless Communication Systems. IEEE, 2006. http://dx.doi.org/10.1109/iswcs.2006.4362271.

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"Path Location Register for Next-Generation Heterogeneous Mobile Networks". W The 3rd International Workshop on Wireless Information Systems. SciTePress - Science and and Technology Publications, 2004. http://dx.doi.org/10.5220/0002670301420151.

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Falowo, Olabisi E., i H. Anthony Chan. "Fuzzy Logic Based Call Admission Control for Next Generation Wireless Networks". W 2006 3rd International Symposium on Wireless Communication Systems. IEEE, 2006. http://dx.doi.org/10.1109/iswcs.2006.4362364.

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Badia, Leonardo, i Nicola Bui. "A group mobility model based on nodes' attraction for next generation wireless networks". W the 3rd international conference. New York, New York, USA: ACM Press, 2006. http://dx.doi.org/10.1145/1292331.1292402.

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Kaddachi, Med Lassaad, Leila Makkaoui, Adel Soudani, Vincent Lecuire i Jean-Marie Moureaux. "FPGA-based image compression for low-power Wireless Camera Sensor Networks". W 2011 3rd International Conference on Next Generation Networks and Services (NGNS). IEEE, 2011. http://dx.doi.org/10.1109/ngns.2011.6142537.

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Xu, Fangmin, Luyong Zhang, Zheng Zhou i Yabin Ye. "Architecture for Next-Generation Reconfigurable Wireless Networks using Cognitive Radio". W 2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom). IEEE, 2008. http://dx.doi.org/10.1109/crowncom.2008.4562537.

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Ben Alla, Said, Abdellah Ezzati, Ahmed Mouhsen, Abderrahim Beni Hssane i Moulay Lahcen Hasnaoui. "Balanced and Centralized Distributed Energy Efficient Clustering for heterogeneous wireless sensor networks". W 2011 3rd International Conference on Next Generation Networks and Services (NGNS). IEEE, 2011. http://dx.doi.org/10.1109/ngns.2011.6142539.

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Raporty organizacyjne na temat "3rd generation wireless networks"

Ludwig, R., A. Gurtov i F. Khafizov. TCP over Second (2.5G) and Third (3G) Generation Wireless Networks. Redaktorzy H. Inamura i G. Montenegro. RFC Editor, luty 2003. http://dx.doi.org/10.17487/rfc3481.

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Dafflon, Baptiste, S. Wielandt, S. Uhlemann, Haruko Wainwright, K. Bennett, Jitendra Kumar, Sebastien Biraud, Susan Hubbard i Stan Wullschleger. Revolutionizing observations and predictability of Arctic system dynamics through next-generation dense, heterogeneous and intelligent wireless sensor networks with embedded AI. Office of Scientific and Technical Information (OSTI), kwiecień 2021. http://dx.doi.org/10.2172/1769774.

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Milek, Karen, i Richard Jones, red. Science in Scottish Archaeology: ScARF Panel Report. Society of Antiquaries of Scotland, wrzesień 2012. http://dx.doi.org/10.9750/scarf.06.2012.193.

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The main recommendations of the panel report can be summarised under four key headings:  High quality, high impact research: the importance of archaeological science is reflected in work that explores issues connected to important contemporary topics, including: the demography of, the nature of movement of, and contact between peoples; societal resilience; living on the Atlantic edge of Europe; and coping with environmental and climatic change. A series of large-scale and integrated archaeological science projects are required to stimulate research into these important topics. To engage fully with Science in Scottish Archaeology iv these questions data of sufficient richness is required that is accessible, both within Scotland and internationally. The RCAHMS’ database Canmore provides a model for digital dissemination that should be built on.  Integration: Archaeological science should be involved early in the process of archaeological investigation and as a matter of routine. Resultant data needs to be securely stored, made accessible and the research results widely disseminated. Sources of advice and its communication must be developed and promoted to support work in the commercial, academic, research, governmental and 3rd sectors.  Knowledge exchange and transfer: knowledge, data and skills need to be routinely transferred and embedded across the archaeological sector. This will enable the archaeological science community to better work together, establishing routes of communication and improving infrastructure. Improvements should be made to communication between different groups including peers, press and the wider public. Mechanisms exist to enable the wider community to engage with, and to feed into, the development of the archaeological and scientific database and to engage with current debates. Projects involving the wider community in data generation should be encouraged and opportunities for public engagement should be pursued through, for example, National Science Week and Scottish Archaeology Month.  Networks and forums: A network of specialists should be promoted to aid collaboration, provide access to the best advice, and raise awareness of current work. This would be complemented by creating a series inter-disciplinary working groups, to discuss and articulate archaeological science issues. An online service to match people (i.e. specialist or student) to material (whether e.g. environmental sample, artefactual assemblage, or skeletal assemblage) is also recommended. An annual meeting should also be held at which researchers would be able to promote current and future work, and draw attention to materials available for analysis, and to specialists/students looking to work on particular assemblages or projects. Such meetings could be rolled into a suitable public outreach event.

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