The Experts below are selected from a list of 7059 Experts worldwide ranked by ideXlab platform
Eduardo Jacob - One of the best experts on this subject based on the ideXlab platform.
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VTC Spring - Host Identity Protocol Based NEMO Solutions: An Evaluation of the Signaling Overhead
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Nerea Toledo, Marivi Higuero, Jean-marie Bonnin, Eduardo JacobAbstract:With the goal of solving shortcomings of MIPv6, alternative protocols such as HIP have been proposed by the research community. In the same way as for MIPv6, solutions to cover NEMO scenarios based on HIP have been worked out. However, there is little agreement on which the best way is to handle NEMO scenarios when using HIP. In this work we analyze different HIP based NEMO solutions and define mathematical models for their analysis. These models are utilized for evaluating the Signaling Overhead of HIP based NEMO protocols in order to provide insight in the specification of the features a HIP based NEMO solution should fulfill.
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Host identity protocol based NEMO solutions: An evaluation of the Signaling Overhead
IEEE Vehicular Technology Conference, 2011Co-Authors: Nerea Toledo, Marivi Higuero, Jean-marie Bonnin, Eduardo JacobAbstract:With the goal of solving shortcomings of MIPv6, alternative protocols\nsuch as HIP have been proposed by the research community. In the\nsame way as for MIPv6, solutions to cover NEMO scenarios based on\nHIP have been worked out. However, there is little agreement on which\nthe best way is to handle NEMO scenarios when using HIP. In this\nwork we analyze different HIP based NEMO solutions and define mathematical\nmodels for their analysis. These models are utilized for evaluating\nthe Signaling Overhead of HIP based NEMO protocols in order to provide\ninsight in the specification of the features a HIP based NEMO solution\nshould fulfill.
Huai-lei Fu - One of the best experts on this subject based on the ideXlab platform.
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reducing Signaling Overhead for femtocell macrocell networks
IEEE Transactions on Mobile Computing, 2013Co-Authors: Huai-lei FuAbstract:Femtocell technology has been proposed to offload user data traffic from the macrocell to the femtocell and extend the limited coverage of the macrocell in mobile communications networks. In existing commercial femtocell/macrocell networks, a widely accepted solution to configure the location areas (LAs) is to partition the femtocells overlapped with a macrocell into small groups and to assign each group with a unique LA ID different from that of the macrocell. Such configuration can reduce the paging cost in the mobility management, but increases registration Signaling Overhead due to discontinuous coverage of femtocells. To reduce Signaling Overhead in the femtocell/macrocell network, we propose a delay registration (DR) algorithm that postpones the registration until the delay timer expires when the mobile station (MS) moves into the overlapped femtocell. Analytical models and simulation experiments are proposed to investigate the performance of the DR algorithm. Our analytical models are generally enough to accommodate various MS mobility behaviors. Our study can provide guidelines for the operators to set up a delay timer to reduce Signaling Overhead while sustaining the traffic offloading capability of the femtocell.
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Reducing Signaling Overhead for Femtocell/Macrocell Networks
IEEE Transactions on Mobile Computing, 2013Co-Authors: Huai-lei FuAbstract:Femtocell technology has been proposed to offload user data traffic from the macrocell to the femtocell and extend the limited coverage of the macrocell in mobile communications networks. In existing commercial femtocell/macrocell networks, a widely accepted solution to configure the location areas (LAs) is to partition the femtocells overlapped with a macrocell into small groups and to assign each group with a unique LA ID different from that of the macrocell. Such configuration can reduce the paging cost in the mobility management, but increases registration Signaling Overhead due to discontinuous coverage of femtocells. To reduce Signaling Overhead in the femtocell/macrocell network, we propose a delay registration (DR) algorithm that postpones the registration until the delay timer expires when the mobile station (MS) moves into the overlapped femtocell. Analytical models and simulation experiments are proposed to investigate the performance of the DR algorithm. Our analytical models are generally enough to accommodate various MS mobility behaviors. Our study can provide guidelines for the operators to set up a delay timer to reduce Signaling Overhead while sustaining the traffic offloading capability of the femtocell.
Jae Woo So - One of the best experts on this subject based on the ideXlab platform.
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Performance analysis of VoIP services in mobile WiMAX systems with a hybrid ARQ scheme
Journal of Communications and Networks, 2012Co-Authors: Jae Woo SoAbstract:This paper analyzes the performance of voice-over-Internet protocol (VoIP) services in terms of the system throughput, the packet delay, and the Signaling Overhead in a mobile WiMAX system with a hybrid automatic repeat request (HARQ) mechanism. Furthermore, a queueing analytical model is developed with due consideration of adaptive modulation and coding, the Signaling Overhead, and the retransmissions of erroneous packets. The arrival process is modeled as the sum of the arrival rate at the initial transmission queue and the retransmission queue, respectively. The service rate is calculated by taking the HARQ retransmissions into consideration. This paper also evaluates the performance of VoIP services in a mobile WiMAX system with and without persistent allocation; persistent allocation is a technique used to reduce the Signaling Overhead for connections with a periodic traffic pattern and a relatively fixed payload. As shown in the simulation results, the HARQ mechanism increases the system throughput as well as the Signaling Overhead and the packet delay.
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An efficient uplink mapping scheme for VoIP services in the IEEE 802.16e OFDMA system
Aeu-international Journal of Electronics and Communications, 2008Co-Authors: Jae Woo SoAbstract:Abstract Informing subscriber stations about new resource assignments creates a Signaling Overhead that influences the system throughput. In particular, the performance of voice over Internet protocol (VoIP) services is seriously affected by the Signaling Overhead because the VoIP packet size is small. In this paper, we address the problem of allocation representation of VoIP packets and propose an efficient uplink mapping scheme that decreases the size of the allocation map in the IEEE 802.16e OFDMA system. We also develop analytical and simulation models to evaluate the performance of the VoIP services. The results show that the Signaling Overhead is greatly decreased when the proposed mapping scheme is used.
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Performance analysis of VoIP services in the IEEE 802.16e OFDMA system with inband Signaling
IEEE Transactions on Vehicular Technology, 2008Co-Authors: Jae Woo SoAbstract:Although the voice over Internet protocol (VoIP) service is expected to be widely supported in wireless mobile networks, the feasibility and capacity of the protocol have not previously been studied in relation to the emerging IEEE 802.16e orthogonal frequency-division multiple access (OFDMA) system. Informing subscriber stations about new downlink or uplink resource assignments creates a Signaling Overhead that influences the system throughput. In particular, the performance of VoIP services is seriously affected by the Signaling Overhead because the symmetry between the downlink and uplink causes immense downlink Overheads. However, previous research on the IEEE 802.16e OFDMA system has not taken the Signaling Overhead into consideration. In the analytical model presented here, the Signaling Overhead is considered in the evaluation of the uplink and downlink performance of VoIP services in the IEEE 802.16e OFDMA system. © 2008 IEEE.
Nerea Toledo - One of the best experts on this subject based on the ideXlab platform.
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VTC Spring - Host Identity Protocol Based NEMO Solutions: An Evaluation of the Signaling Overhead
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Nerea Toledo, Marivi Higuero, Jean-marie Bonnin, Eduardo JacobAbstract:With the goal of solving shortcomings of MIPv6, alternative protocols such as HIP have been proposed by the research community. In the same way as for MIPv6, solutions to cover NEMO scenarios based on HIP have been worked out. However, there is little agreement on which the best way is to handle NEMO scenarios when using HIP. In this work we analyze different HIP based NEMO solutions and define mathematical models for their analysis. These models are utilized for evaluating the Signaling Overhead of HIP based NEMO protocols in order to provide insight in the specification of the features a HIP based NEMO solution should fulfill.
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Host identity protocol based NEMO solutions: An evaluation of the Signaling Overhead
IEEE Vehicular Technology Conference, 2011Co-Authors: Nerea Toledo, Marivi Higuero, Jean-marie Bonnin, Eduardo JacobAbstract:With the goal of solving shortcomings of MIPv6, alternative protocols\nsuch as HIP have been proposed by the research community. In the\nsame way as for MIPv6, solutions to cover NEMO scenarios based on\nHIP have been worked out. However, there is little agreement on which\nthe best way is to handle NEMO scenarios when using HIP. In this\nwork we analyze different HIP based NEMO solutions and define mathematical\nmodels for their analysis. These models are utilized for evaluating\nthe Signaling Overhead of HIP based NEMO protocols in order to provide\ninsight in the specification of the features a HIP based NEMO solution\nshould fulfill.
Fredrik Gunnarsson - One of the best experts on this subject based on the ideXlab platform.
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Dynamic Tracking Area List configuration and performance evaluation in LTE
2010 IEEE Globecom Workshops, 2010Co-Authors: Sara Modarres Razavi, Di Yuan, Fredrik GunnarssonAbstract:Reducing the Signaling Overhead for tracing user equipment (UE), while maintaining the improved performance over time despite the changes in UE location and mobility patterns, is a challenging issue in the area of mobility management. Flexibility and automatic reconfiguration are two significant features in Long Term Evolution (LTE) systems. The Tracking Area List (TAL) is a novel concept in LTE systems, which allows a more flexible configurations, expecting to reduce the overall Signaling Overhead. In this paper, we first present a ”rule of thumb” method to allocate and assign TALs for a network. The easily applied approach does not require any data other than what is available for conventional TA design. Second we compare the performance of an optimum conventional TA design with the suggested TAL design for a large scale network in Lisbon, Portugal. A thorough computation is done to make a justified evaluation. We follow the comparison during specific time intervals for one complete day, and we illustrate the performance of reconfiguration for each approach. The results clearly demonstrate the ability of dynamic TAL in reducing the Signaling Overhead and maintaining a good performance due to reconfiguration compared to the conventional TA design.
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Exploiting Tracking Area List for Improving Signaling Overhead in LTE
2010 IEEE 71st Vehicular Technology Conference, 2010Co-Authors: Sara Modarres Razavi, Di Yuan, Fredrik GunnarssonAbstract:Reducing the Overhead required for tracing mobile devices is one of the major aspects in the study of mobility management of a cellular network. The Long Term Evolution (LTE) systems give a more flexible configuration of Tracking Area (TA) design by means of Tracking Area List (TAL). Being a novel concept, TAL goes beyond the capability of the conventional TA approach. Although TAL is expected to be able to reduce the overall Signaling Overhead by overcoming a couple of major limitations of the conventional TA concept, how to apply TAL in large scale networks, remains unexplored. In this paper, we present a novel approach for allocating and assigning TA lists. The approach does not require any data other than what is needed for conventional TA design. We present numerical results to illustrate the approach for a realistic network of Lisbon city. The experiments demonstrate the ability of TAL in reducing the Signaling Overhead compared to the conventional TA concept.
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VTC Spring - Exploiting Tracking Area List for Improving Signaling Overhead in LTE
2010 IEEE 71st Vehicular Technology Conference, 2010Co-Authors: Sara Modarres Razavi, Di Yuan, Fredrik GunnarssonAbstract:Reducing the Overhead required for tracing mobile devices is one of the major aspects in the study of mobility management of a cellular network. The Long Term Evolution (LTE) systems give a more flexible configuration of Tracking Area (TA) design by means of Tracking Area List (TAL). Being a novel concept, TAL goes beyond the capability of the conventional TA approach. Although TAL is expected to be able to reduce the overall Signaling Overhead by overcoming a couple of major limitations of the conventional TA concept, how to apply TAL in large scale networks, remains unexplored. In this paper, we present a novel approach for allocating and assigning TA lists. The approach does not require any data other than what is needed for conventional TA design. We present numerical results to illustrate the approach for a realistic network of Lisbon city. The experiments demonstrate the ability of TAL in reducing the Signaling Overhead compared to the conventional TA concept.
