The Experts below are selected from a list of 198 Experts worldwide ranked by ideXlab platform

Dusit Niyato - One of the best experts on this subject based on the ideXlab platform.

  • A Coalition Formation Game for Remote Radio Head Cooperation in Cloud Radio Access Network
    IEEE Transactions on Vehicular Technology, 2017
    Co-Authors: Shun-cheng Zhan, Dusit Niyato
    Abstract:

    With the increasing demand of spectrum and emergence of mobile devices, a cloud radio access network (C-RAN) is a promising technology to improve network capacity and coverage. The key concept of the C-RAN is to separate the radio Function unit in remote radio heads (RRHs) from the Digital Function unit in baseband units (BBUs). This separation facilitates efficient spectrum and infrastructure sharing in the C-RAN. This paper considers the cooperative interference management among RRHs in the C-RAN. The RRHs can form coalitions to mitigate intra-interference and jointly serve their subscribers. To characterize RRH performance under the coalition, this paper develops two signal-to-interference-plus-noise-ratio (SINR)-based downlink throughput models of RRH, where one adopts tools from stochastic geometry to capture the interference from vehicular users (VUs) belonging to noncooperative RRHs, and another ignores the VU interference. In this paper, a coalition formation game is formulated to model the situation in which RRHs of C-RAN can make an individual decision to cooperatively serve their VUs if the throughput of the RRH can be improved. To obtain the solution of the proposed game, we develop a distributed coalition formation algorithm and analyze the stability of the coalition structure using a Markov chain model. Simulation results show that, as compared with the noncoalition and grand coalition, our distributed coalition formation can improve the C-RAN throughput by at least 20% and 80%, respectively. Furthermore, according to extensive simulation, we can define the conditions needed for RRHs to form a coalition and obtain higher throughput.

  • A Coalition Formation Game for Remote Radio Heads Cooperation in Cloud Radio Access Network
    IEEE Transactions on Vehicular Technology, 2016
    Co-Authors: Shun-cheng Zhan, Dusit Niyato
    Abstract:

    With the increasing demand of spectrum and emergence of mobile devices, a Cloud Radio Access Network (CRAN) is a promising technology to improve network capacity and coverage. The key concept of the C-RAN is to separate the radio Function unit in remote radio heads (RRHs) from the Digital Function unit in baseband units (BBUs). This separation facilitates the efficient spectrum and infrastructure sharing in the C-RAN. This paper considers the cooperative interference management among RRHs in the C-RAN. The RRHs can form coalitions to mitigate intra-interference and jointly serve their subscribers. To characterize RRH performance under the coalition, this paper develops two signal-to-interference-plus-noise-ratio (SINR)- based downlink throughput models of RRH, where one adopts tools from stochastic geometry to capture the interference from vehicular users (VUs) belonging to non-cooperative RRHs and another one ignores the VU interference. In this paper, a coalition formation game is formulated to model the situation in which RRHs of C-RAN can make an individual decision to cooperatively serve their VUs if the throughput of the RRH can be improved. To obtain the solution of the proposed game, we develop a distributed coalition formation algorithm and analyze the stability of the coalition structure using a Markov chain model. Simulation results show that, compared with the non-coalition and grand coalition, our distributed coalition formation can improve the C-RAN throughput by at least 20% and 80%, respectively. Furthermore, according to extensive simulation, we can define the conditions needed for RRHs to form a coalition and obtain higher throughput.

Shun-cheng Zhan - One of the best experts on this subject based on the ideXlab platform.

  • A Coalition Formation Game for Remote Radio Head Cooperation in Cloud Radio Access Network
    IEEE Transactions on Vehicular Technology, 2017
    Co-Authors: Shun-cheng Zhan, Dusit Niyato
    Abstract:

    With the increasing demand of spectrum and emergence of mobile devices, a cloud radio access network (C-RAN) is a promising technology to improve network capacity and coverage. The key concept of the C-RAN is to separate the radio Function unit in remote radio heads (RRHs) from the Digital Function unit in baseband units (BBUs). This separation facilitates efficient spectrum and infrastructure sharing in the C-RAN. This paper considers the cooperative interference management among RRHs in the C-RAN. The RRHs can form coalitions to mitigate intra-interference and jointly serve their subscribers. To characterize RRH performance under the coalition, this paper develops two signal-to-interference-plus-noise-ratio (SINR)-based downlink throughput models of RRH, where one adopts tools from stochastic geometry to capture the interference from vehicular users (VUs) belonging to noncooperative RRHs, and another ignores the VU interference. In this paper, a coalition formation game is formulated to model the situation in which RRHs of C-RAN can make an individual decision to cooperatively serve their VUs if the throughput of the RRH can be improved. To obtain the solution of the proposed game, we develop a distributed coalition formation algorithm and analyze the stability of the coalition structure using a Markov chain model. Simulation results show that, as compared with the noncoalition and grand coalition, our distributed coalition formation can improve the C-RAN throughput by at least 20% and 80%, respectively. Furthermore, according to extensive simulation, we can define the conditions needed for RRHs to form a coalition and obtain higher throughput.

  • A Coalition Formation Game for Remote Radio Heads Cooperation in Cloud Radio Access Network
    IEEE Transactions on Vehicular Technology, 2016
    Co-Authors: Shun-cheng Zhan, Dusit Niyato
    Abstract:

    With the increasing demand of spectrum and emergence of mobile devices, a Cloud Radio Access Network (CRAN) is a promising technology to improve network capacity and coverage. The key concept of the C-RAN is to separate the radio Function unit in remote radio heads (RRHs) from the Digital Function unit in baseband units (BBUs). This separation facilitates the efficient spectrum and infrastructure sharing in the C-RAN. This paper considers the cooperative interference management among RRHs in the C-RAN. The RRHs can form coalitions to mitigate intra-interference and jointly serve their subscribers. To characterize RRH performance under the coalition, this paper develops two signal-to-interference-plus-noise-ratio (SINR)- based downlink throughput models of RRH, where one adopts tools from stochastic geometry to capture the interference from vehicular users (VUs) belonging to non-cooperative RRHs and another one ignores the VU interference. In this paper, a coalition formation game is formulated to model the situation in which RRHs of C-RAN can make an individual decision to cooperatively serve their VUs if the throughput of the RRH can be improved. To obtain the solution of the proposed game, we develop a distributed coalition formation algorithm and analyze the stability of the coalition structure using a Markov chain model. Simulation results show that, compared with the non-coalition and grand coalition, our distributed coalition formation can improve the C-RAN throughput by at least 20% and 80%, respectively. Furthermore, according to extensive simulation, we can define the conditions needed for RRHs to form a coalition and obtain higher throughput.

R.p. Kenan - One of the best experts on this subject based on the ideXlab platform.

  • Integrated optical architectures for tapped delay lines
    Journal of Lightwave Technology, 1990
    Co-Authors: E. Anemogiannis, R.p. Kenan
    Abstract:

    An integrated optics (IO) device that is an implementation of an IO tapped delay line is discussed. It is capable of performing discrete convolution of an optical pulse sequence with a preset Digital Function. Several architectures for the device are presented. A systematic realization of the preset Function samples that permits efficient utilization of all the input light power and maximization of the output signal-to-noise ratio (SNR) for the device is discussed. A detailed analysis of what determines the number of preset samples that can be realized and how to realize them on a LiNbO/sub 3/ crystal is given. Two Digital filter design examples are presented, and the quantization error effects on their performance are examined. The same architectures are shown to implement Digital-to-analog (D/A) conversion and systolic multiplication of a Toeplitz matrix with a vector having the form of optical pulses.

E. Anemogiannis - One of the best experts on this subject based on the ideXlab platform.

  • Integrated optical architectures for tapped delay lines
    Journal of Lightwave Technology, 1990
    Co-Authors: E. Anemogiannis, R.p. Kenan
    Abstract:

    An integrated optics (IO) device that is an implementation of an IO tapped delay line is discussed. It is capable of performing discrete convolution of an optical pulse sequence with a preset Digital Function. Several architectures for the device are presented. A systematic realization of the preset Function samples that permits efficient utilization of all the input light power and maximization of the output signal-to-noise ratio (SNR) for the device is discussed. A detailed analysis of what determines the number of preset samples that can be realized and how to realize them on a LiNbO/sub 3/ crystal is given. Two Digital filter design examples are presented, and the quantization error effects on their performance are examined. The same architectures are shown to implement Digital-to-analog (D/A) conversion and systolic multiplication of a Toeplitz matrix with a vector having the form of optical pulses.

Andy M. Tyrrell - One of the best experts on this subject based on the ideXlab platform.

  • ASP-DAC - Variability mapping at runtime using the PAnDA multi-reconfigurable architecture
    2017 22nd Asia and South Pacific Design Automation Conference (ASP-DAC), 2020
    Co-Authors: Simon J. Bale, James A. Walker, Martin A. Trefzer, Andy M. Tyrrell
    Abstract:

    This paper describes a novel multi-reconfigurable architecture, which allows variability-aware design, rapid prototyping and post-fabrication optimisation of Digital systems. This is achieved by exploiting reconfiguration at both the Digital Function level and the transistor level. A runtime variability map of the architecture, created using ring oscillators, is presented.

  • Variability mapping at runtime using the PAnDA multi-reconfigurable architecture
    2017 22nd Asia and South Pacific Design Automation Conference (ASP-DAC), 2017
    Co-Authors: Simon J. Bale, James A. Walker, Martin A. Trefzer, Andy M. Tyrrell
    Abstract:

    This paper describes a novel multi-reconfigurable architecture, which allows variability-aware design, rapid prototyping and post-fabrication optimisation of Digital systems. This is achieved by exploiting reconfiguration at both the Digital Function level and the transistor level. A runtime variability map of the architecture, created using ring oscillators, is presented.