The Experts below are selected from a list of 5604 Experts worldwide ranked by ideXlab platform
Rahim Tafazolli - One of the best experts on this subject based on the ideXlab platform.
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Memory-full Context-aware Predictive Mobility Management in Dual Connectivity 5G Networks
IEEE Access, 2018Co-Authors: Abdelrahim Mohamed, Muhammad Ali Imran, Pei Xiao, Rahim TafazolliAbstract:—Network densification with small cell deployment is being considered as one of the dominant themes in the fifth generation (5G) cellular system. Despite the capacity gains, such deployment scenarios raise several challenges from mobility management perspective. The small cell size, which implies a small cell residence time, will increase the handover (HO) rate dramatically. Consequently, the HO latency will become a critical consideration in the 5G era. The latter requires an intelligent, fast and light-weight HO procedure with minimal signalling overhead. In this direction, we propose a memory-full context-aware HO scheme with mobility prediction to achieve the aforementioned objectives. We consider a dual connectivity radio access network architecture with Logical Separation between control and data planes because it offers relaxed constraints in implementing the predictive approaches. The proposed scheme predicts future HO events along with the expected HO time by combining radio frequency performance to physical proximity along with the user context in terms of speed, direction and HO history. To minimise the processing and the storage requirements whilst improving the prediction performance, a user-specific prediction triggering threshold is proposed. The prediction outcome is utilised to perform advance HO signalling whilst suspending the periodic transmission of measurement reports. Analytical and simulation results show that the proposed scheme provides promising gains over the conventional approach.
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Predictive and Core-Network Efficient RRC Signalling for Active State Handover in RANs With Control/Data Separation
IEEE Transactions on Wireless Communications, 2017Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imran, Rahim TafazolliAbstract:Frequent handovers (HOs) in dense small cell deployment scenarios could lead to a dramatic increase in signaling overhead. This suggests a paradigm shift toward a signaling conscious cellular architecture with intelligent mobility management. In this direction, a futuristic radio access network with a Logical Separation between control and data planes has been proposed in research community. It aims to overcome limitations of the conventional architecture by providing high data rate services under the umbrella of a coverage layer in a dual connection mode. This approach enables signaling efficient HO procedures since the control plane remains unchanged when the users move within the footprint of the same umbrella. Considering this configuration, we propose a core-network efficient radio resource control signaling scheme for active state HO and develop an analytical framework to evaluate its signaling load as a function of network density, user mobility, and session characteristics. In addition, we propose an intelligent HO prediction scheme with advance resource preparation in order to minimize the HO signaling latency. Numerical and simulation results show promising gains in terms of reduction in HO latency and signaling load as compared with conventional approaches.
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control data Separation architecture for cellular radio access networks a survey and outlook
IEEE Communications Surveys and Tutorials, 2016Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imran, Rahim TafazolliAbstract:Conventional cellular systems are designed to ensure ubiquitous coverage with an always present wireless channel irrespective of the spatial and temporal demand of service. This approach raises several problems due to the tight coupling between network and data access points, as well as the paradigm shift towards data-oriented services, heterogeneous deployments and network densification. A Logical Separation between control and data planes is seen as a promising solution that could overcome these issues, by providing data services under the umbrella of a coverage layer. This article presents a holistic survey of existing literature on the control-data Separation architecture (CDSA) for cellular radio access networks. As a starting point, we discuss the fundamentals, concepts, and general structure of the CDSA. Then, we point out limitations of the conventional architecture in futuristic deployment scenarios. In addition, we present and critically discuss the work that has been done to investigate potential benefits of the CDSA, as well as its technical challenges and enabling technologies. Finally, an overview of standardisation proposals related to this research vision is provided.
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mobility prediction for handover management in cellular networks with control data Separation
International Conference on Communications, 2015Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imran, Seyed Amir Hoseinitabatabaei, Rahim TafazolliAbstract:In research community, a new radio access network architecture with a Logical Separation between control plane (CP) and data plane (DP) has been proposed for future cellular systems. It aims to overcome limitations of the conventional architecture by providing high data rate services under the umbrella of a coverage layer in a dual connection mode. This configuration could provide significant savings in signalling overhead. In particular, mobility robustness with minimal handover (HO) signalling is considered as one of the most promising benefits of this architecture. However, the DP mobility remains an issue that needs to be investigated. We consider predictive DP HO management as a solution that could minimise the out-of-band signalling related to the HO procedure. Thus we propose a mobility prediction scheme based on Markov Chains. The developed model predicts the user's trajectory in terms of a HO sequence in order to minimise the interruption time and the associated signalling when the HO is triggered. Depending on the prediction accuracy, numerical results show that the predictive HO management strategy could significantly reduce the signalling cost as compared with the conventional non-predictive mechanism.
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Energy Efficient 5G Network with Logical Separation of Control and Data Functionality
2015Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Rahim TafazolliAbstract:As soon as 2020, network densification and spectrum extension will be the dominant theme to support enormous capacity and massive connectivity [1]. However, this approach may not guarantee wide area coverage due to the poor propagation capabilities of high frequency bands. In addition, energy efficiency and signalling overhead will become critical considerations in ultra-dense deployment scenarios. This calls for a futuristic two layer RAN architecture with dual connectivity, where the high frequency bands are used for data services, complemented by a coverage layer at conventional cellular bands [2]. This Separation of control and data planes will enable a transition from always-on to always-available systems and could result in order of magnitude savings in energy and signalling overhead.
Abdelrahim Mohamed - One of the best experts on this subject based on the ideXlab platform.
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Memory-full Context-aware Predictive Mobility Management in Dual Connectivity 5G Networks
IEEE Access, 2018Co-Authors: Abdelrahim Mohamed, Muhammad Ali Imran, Pei Xiao, Rahim TafazolliAbstract:—Network densification with small cell deployment is being considered as one of the dominant themes in the fifth generation (5G) cellular system. Despite the capacity gains, such deployment scenarios raise several challenges from mobility management perspective. The small cell size, which implies a small cell residence time, will increase the handover (HO) rate dramatically. Consequently, the HO latency will become a critical consideration in the 5G era. The latter requires an intelligent, fast and light-weight HO procedure with minimal signalling overhead. In this direction, we propose a memory-full context-aware HO scheme with mobility prediction to achieve the aforementioned objectives. We consider a dual connectivity radio access network architecture with Logical Separation between control and data planes because it offers relaxed constraints in implementing the predictive approaches. The proposed scheme predicts future HO events along with the expected HO time by combining radio frequency performance to physical proximity along with the user context in terms of speed, direction and HO history. To minimise the processing and the storage requirements whilst improving the prediction performance, a user-specific prediction triggering threshold is proposed. The prediction outcome is utilised to perform advance HO signalling whilst suspending the periodic transmission of measurement reports. Analytical and simulation results show that the proposed scheme provides promising gains over the conventional approach.
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Predictive and Core-Network Efficient RRC Signalling for Active State Handover in RANs With Control/Data Separation
IEEE Transactions on Wireless Communications, 2017Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imran, Rahim TafazolliAbstract:Frequent handovers (HOs) in dense small cell deployment scenarios could lead to a dramatic increase in signaling overhead. This suggests a paradigm shift toward a signaling conscious cellular architecture with intelligent mobility management. In this direction, a futuristic radio access network with a Logical Separation between control and data planes has been proposed in research community. It aims to overcome limitations of the conventional architecture by providing high data rate services under the umbrella of a coverage layer in a dual connection mode. This approach enables signaling efficient HO procedures since the control plane remains unchanged when the users move within the footprint of the same umbrella. Considering this configuration, we propose a core-network efficient radio resource control signaling scheme for active state HO and develop an analytical framework to evaluate its signaling load as a function of network density, user mobility, and session characteristics. In addition, we propose an intelligent HO prediction scheme with advance resource preparation in order to minimize the HO signaling latency. Numerical and simulation results show promising gains in terms of reduction in HO latency and signaling load as compared with conventional approaches.
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control data Separation architecture for cellular radio access networks a survey and outlook
IEEE Communications Surveys and Tutorials, 2016Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imran, Rahim TafazolliAbstract:Conventional cellular systems are designed to ensure ubiquitous coverage with an always present wireless channel irrespective of the spatial and temporal demand of service. This approach raises several problems due to the tight coupling between network and data access points, as well as the paradigm shift towards data-oriented services, heterogeneous deployments and network densification. A Logical Separation between control and data planes is seen as a promising solution that could overcome these issues, by providing data services under the umbrella of a coverage layer. This article presents a holistic survey of existing literature on the control-data Separation architecture (CDSA) for cellular radio access networks. As a starting point, we discuss the fundamentals, concepts, and general structure of the CDSA. Then, we point out limitations of the conventional architecture in futuristic deployment scenarios. In addition, we present and critically discuss the work that has been done to investigate potential benefits of the CDSA, as well as its technical challenges and enabling technologies. Finally, an overview of standardisation proposals related to this research vision is provided.
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mobility prediction for handover management in cellular networks with control data Separation
International Conference on Communications, 2015Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imran, Seyed Amir Hoseinitabatabaei, Rahim TafazolliAbstract:In research community, a new radio access network architecture with a Logical Separation between control plane (CP) and data plane (DP) has been proposed for future cellular systems. It aims to overcome limitations of the conventional architecture by providing high data rate services under the umbrella of a coverage layer in a dual connection mode. This configuration could provide significant savings in signalling overhead. In particular, mobility robustness with minimal handover (HO) signalling is considered as one of the most promising benefits of this architecture. However, the DP mobility remains an issue that needs to be investigated. We consider predictive DP HO management as a solution that could minimise the out-of-band signalling related to the HO procedure. Thus we propose a mobility prediction scheme based on Markov Chains. The developed model predicts the user's trajectory in terms of a HO sequence in order to minimise the interruption time and the associated signalling when the HO is triggered. Depending on the prediction accuracy, numerical results show that the predictive HO management strategy could significantly reduce the signalling cost as compared with the conventional non-predictive mechanism.
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Energy Efficient 5G Network with Logical Separation of Control and Data Functionality
2015Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Rahim TafazolliAbstract:As soon as 2020, network densification and spectrum extension will be the dominant theme to support enormous capacity and massive connectivity [1]. However, this approach may not guarantee wide area coverage due to the poor propagation capabilities of high frequency bands. In addition, energy efficiency and signalling overhead will become critical considerations in ultra-dense deployment scenarios. This calls for a futuristic two layer RAN architecture with dual connectivity, where the high frequency bands are used for data services, complemented by a coverage layer at conventional cellular bands [2]. This Separation of control and data planes will enable a transition from always-on to always-available systems and could result in order of magnitude savings in energy and signalling overhead.
Hou Chun-long - One of the best experts on this subject based on the ideXlab platform.
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Research on Weapons and Equipments Training Simulation Software Metamodel Design
Computer Simulation, 2012Co-Authors: Hou Chun-longAbstract:To solve the development problems of current WETS(Weapons and Equipments Training Simulation Software),a development approach of WETS was proposed based on a domain-oriented metamodel.After analyzing basic characteristics of WETS,the WSML(Weapons and Equipments Training Simulation Software Modeling Language) metamodel was constructed on metamodeling method,covering function and non-function,Logical Separation and description of every part of the system and relations between them.A domain-oriented modeling language could be generated from the metamodel by the metamodel interpreter.Then,the development approach was proposed based on WETS metamodel.Lots applications indicate that this method supports model reuse and can improve development efficiency of WETS.
Chuntao Wang - One of the best experts on this subject based on the ideXlab platform.
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Application of Role-Based Access Control in Network Management System
2010 International Conference on Internet Technology and Applications, 2010Co-Authors: Chuntao WangAbstract:In order to solve the access control problems of network management system in development, This paper presents a role-based multi-granularity access control program, this program implements Logical Separation between user and access rights, you can customize roles for different user according to their needs, making network management system more flexible and secure in the user management; the program has put fine-grained control of the roles into practice and solve the problem of regional resources access control.
Muhammad Imran - One of the best experts on this subject based on the ideXlab platform.
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Predictive and Core-Network Efficient RRC Signalling for Active State Handover in RANs With Control/Data Separation
IEEE Transactions on Wireless Communications, 2017Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imran, Rahim TafazolliAbstract:Frequent handovers (HOs) in dense small cell deployment scenarios could lead to a dramatic increase in signaling overhead. This suggests a paradigm shift toward a signaling conscious cellular architecture with intelligent mobility management. In this direction, a futuristic radio access network with a Logical Separation between control and data planes has been proposed in research community. It aims to overcome limitations of the conventional architecture by providing high data rate services under the umbrella of a coverage layer in a dual connection mode. This approach enables signaling efficient HO procedures since the control plane remains unchanged when the users move within the footprint of the same umbrella. Considering this configuration, we propose a core-network efficient radio resource control signaling scheme for active state HO and develop an analytical framework to evaluate its signaling load as a function of network density, user mobility, and session characteristics. In addition, we propose an intelligent HO prediction scheme with advance resource preparation in order to minimize the HO signaling latency. Numerical and simulation results show promising gains in terms of reduction in HO latency and signaling load as compared with conventional approaches.
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control data Separation architecture for cellular radio access networks a survey and outlook
IEEE Communications Surveys and Tutorials, 2016Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imran, Rahim TafazolliAbstract:Conventional cellular systems are designed to ensure ubiquitous coverage with an always present wireless channel irrespective of the spatial and temporal demand of service. This approach raises several problems due to the tight coupling between network and data access points, as well as the paradigm shift towards data-oriented services, heterogeneous deployments and network densification. A Logical Separation between control and data planes is seen as a promising solution that could overcome these issues, by providing data services under the umbrella of a coverage layer. This article presents a holistic survey of existing literature on the control-data Separation architecture (CDSA) for cellular radio access networks. As a starting point, we discuss the fundamentals, concepts, and general structure of the CDSA. Then, we point out limitations of the conventional architecture in futuristic deployment scenarios. In addition, we present and critically discuss the work that has been done to investigate potential benefits of the CDSA, as well as its technical challenges and enabling technologies. Finally, an overview of standardisation proposals related to this research vision is provided.
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mobility prediction for handover management in cellular networks with control data Separation
International Conference on Communications, 2015Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imran, Seyed Amir Hoseinitabatabaei, Rahim TafazolliAbstract:In research community, a new radio access network architecture with a Logical Separation between control plane (CP) and data plane (DP) has been proposed for future cellular systems. It aims to overcome limitations of the conventional architecture by providing high data rate services under the umbrella of a coverage layer in a dual connection mode. This configuration could provide significant savings in signalling overhead. In particular, mobility robustness with minimal handover (HO) signalling is considered as one of the most promising benefits of this architecture. However, the DP mobility remains an issue that needs to be investigated. We consider predictive DP HO management as a solution that could minimise the out-of-band signalling related to the HO procedure. Thus we propose a mobility prediction scheme based on Markov Chains. The developed model predicts the user's trajectory in terms of a HO sequence in order to minimise the interruption time and the associated signalling when the HO is triggered. Depending on the prediction accuracy, numerical results show that the predictive HO management strategy could significantly reduce the signalling cost as compared with the conventional non-predictive mechanism.
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Energy Efficient 5G Network with Logical Separation of Control and Data Functionality
2015Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Rahim TafazolliAbstract:As soon as 2020, network densification and spectrum extension will be the dominant theme to support enormous capacity and massive connectivity [1]. However, this approach may not guarantee wide area coverage due to the poor propagation capabilities of high frequency bands. In addition, energy efficiency and signalling overhead will become critical considerations in ultra-dense deployment scenarios. This calls for a futuristic two layer RAN architecture with dual connectivity, where the high frequency bands are used for data services, complemented by a coverage layer at conventional cellular bands [2]. This Separation of control and data planes will enable a transition from always-on to always-available systems and could result in order of magnitude savings in energy and signalling overhead.
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ICC - Correlation-based adaptive pilot pattern in control/data Separation architecture
2015 IEEE International Conference on Communications (ICC), 2015Co-Authors: Abdelrahim Mohamed, Muhammad Imran, Oluwakayode Onireti, Ali Imrany, Rahim TafazolliAbstract:Most of the wireless systems such as the long term evolution (LTE) adopt a pilot symbol-aided channel estimation approach for data detection purposes. In this technique, some of the transmission resources are allocated to common pilot signals which constitute a significant overhead in current standards. This can be traced to the worst-case design approach adopted in these systems where the pilot spacing is chosen based on extreme condition assumptions. This suggests extending the set of the parameters that can be adaptively adjusted to include the pilot density. In this paper, we propose an adaptive pilot pattern scheme that depends on estimating the channel correlation. A new system architecture with a Logical Separation between control and data planes is considered and orthogonal frequency division multiplexing (OFDM) is chosen as the access technique. Simulation results show that the proposed scheme can provide a significant saving of the LTE pilot overhead with a marginal performance penalty.
