The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform

V.k. Bhargava - One of the best experts on this subject based on the ideXlab platform.

  • joint downlink Cell association and Bandwidth allocation for wireless backhauling in two tier hetnets with large scale antenna arrays
    IEEE Transactions on Wireless Communications, 2016
    Co-Authors: Ning Wang, Ekram Hossain, V.k. Bhargava
    Abstract:

    The problem of joint downlink Cell association (CA) and wireless backhaul Bandwidth allocation (WBBA) in two-tier Cellular heterogeneous networks (HetNets) is investigated. Large-scale antenna array is implemented at the macro base station (BS), while the small Cells within the macro Cell range are single-antenna BSs and they rely on over-the-air links to the macro BS for backhauling. A sum logarithmic user rate maximization problem is studied under the wireless backhaul constraints. Duplex and spectrum sharing with co-channel reverse time-division duplex (TDD) and dynamic soft frequency reuse is considered for interference management in the two-tier HetNet employing large-scale antenna arrays at the macro BS and wireless backhauling for small Cells. Two in-band WBBA scenarios, namely, unified Bandwidth allocation and per-small-Cell Bandwidth allocation, are investigated for joint CA-WBBA in the HetNet. A two-level hierarchical decomposition method for relaxed optimization is employed to solve the mixed-integer nonlinear program (MINLP). Solutions based on the General Algorithm Modeling System (GAMS) optimization solver and fast heuristics are also proposed for Cell association in the per-small-Cell WBBA scenario. It is shown that when all small Cells have to use in-band wireless backhaul, the system load has more impact on both the sum logarithmic rate and per-user rate performance than the number of small Cells deployed within the macro Cell range. The proposed joint CA-WBBA algorithms have an optimal load approximately equal to the size of the large-scale antenna array at the macro BS. The Cell range expansion (CRE) strategy, which is an efficient Cell association scheme for HetNets with ideal backhauling, is shown to be inefficient when in-band wireless backhauling for small Cells comes into play.

  • joint downlink Cell association and Bandwidth allocation for wireless backhauling in two tier hetnets with large scale antenna arrays
    arXiv: Networking and Internet Architecture, 2014
    Co-Authors: Ning Wang, Ekram Hossain, V.k. Bhargava
    Abstract:

    The problem of joint downlink Cell association (CA) and wireless backhaul Bandwidth allocation (WBBA) in two-tier Cellular heterogeneous networks (HetNets) is considered. Large-scale antenna array is implemented at the macro base station (BS), while the small Cells within the macro Cell range are single-antenna BSs and they rely on over-the-air links to the macro BS for backhauling. A sum logarithmic user rate maximization problem is investigated considering wireless backhauling constraints. A duplex and spectrum sharing scheme based on co-channel reverse time-division duplex (TDD) and dynamic soft frequency reuse (SFR) is proposed for interference management in two-tier HetNets with large-scale antenna arrays at the macro BS and wireless backhauling for small Cells. Two in-band WBBA scenarios, namely, unified Bandwidth allocation and per-small-Cell Bandwidth allocation scenarios, are investigated for joint CA-WBBA in the HetNet. A two-level hierarchical decomposition method for relaxed optimization is employed to solve the mixed-integer nonlinear program (MINLP). Solutions based on the General Algorithm Modeling System (GAMS) optimization solver and fast heuristics are also proposed for Cell association in the per-small-Cell WBBA scenario. It is shown that when all small Cells have to use in-band wireless backhaul, the system load has more impact on both the sum log-rate and per-user rate performance than the number of small Cells deployed within the macro Cell range. The proposed joint CA-WBBA algorithms have an optimal load approximately equal to the size of the large-scale antenna array at the macro BS. The Cell range expansion (CRE) strategy, which is an efficient Cell association scheme for HetNets with perfect backhauling, is shown to be inefficient when in-band wireless backhauling for small Cells comes into play.

Ning Wang - One of the best experts on this subject based on the ideXlab platform.

  • joint downlink Cell association and Bandwidth allocation for wireless backhauling in two tier hetnets with large scale antenna arrays
    IEEE Transactions on Wireless Communications, 2016
    Co-Authors: Ning Wang, Ekram Hossain, V.k. Bhargava
    Abstract:

    The problem of joint downlink Cell association (CA) and wireless backhaul Bandwidth allocation (WBBA) in two-tier Cellular heterogeneous networks (HetNets) is investigated. Large-scale antenna array is implemented at the macro base station (BS), while the small Cells within the macro Cell range are single-antenna BSs and they rely on over-the-air links to the macro BS for backhauling. A sum logarithmic user rate maximization problem is studied under the wireless backhaul constraints. Duplex and spectrum sharing with co-channel reverse time-division duplex (TDD) and dynamic soft frequency reuse is considered for interference management in the two-tier HetNet employing large-scale antenna arrays at the macro BS and wireless backhauling for small Cells. Two in-band WBBA scenarios, namely, unified Bandwidth allocation and per-small-Cell Bandwidth allocation, are investigated for joint CA-WBBA in the HetNet. A two-level hierarchical decomposition method for relaxed optimization is employed to solve the mixed-integer nonlinear program (MINLP). Solutions based on the General Algorithm Modeling System (GAMS) optimization solver and fast heuristics are also proposed for Cell association in the per-small-Cell WBBA scenario. It is shown that when all small Cells have to use in-band wireless backhaul, the system load has more impact on both the sum logarithmic rate and per-user rate performance than the number of small Cells deployed within the macro Cell range. The proposed joint CA-WBBA algorithms have an optimal load approximately equal to the size of the large-scale antenna array at the macro BS. The Cell range expansion (CRE) strategy, which is an efficient Cell association scheme for HetNets with ideal backhauling, is shown to be inefficient when in-band wireless backhauling for small Cells comes into play.

  • joint downlink Cell association and Bandwidth allocation for wireless backhauling in two tier hetnets with large scale antenna arrays
    arXiv: Networking and Internet Architecture, 2014
    Co-Authors: Ning Wang, Ekram Hossain, V.k. Bhargava
    Abstract:

    The problem of joint downlink Cell association (CA) and wireless backhaul Bandwidth allocation (WBBA) in two-tier Cellular heterogeneous networks (HetNets) is considered. Large-scale antenna array is implemented at the macro base station (BS), while the small Cells within the macro Cell range are single-antenna BSs and they rely on over-the-air links to the macro BS for backhauling. A sum logarithmic user rate maximization problem is investigated considering wireless backhauling constraints. A duplex and spectrum sharing scheme based on co-channel reverse time-division duplex (TDD) and dynamic soft frequency reuse (SFR) is proposed for interference management in two-tier HetNets with large-scale antenna arrays at the macro BS and wireless backhauling for small Cells. Two in-band WBBA scenarios, namely, unified Bandwidth allocation and per-small-Cell Bandwidth allocation scenarios, are investigated for joint CA-WBBA in the HetNet. A two-level hierarchical decomposition method for relaxed optimization is employed to solve the mixed-integer nonlinear program (MINLP). Solutions based on the General Algorithm Modeling System (GAMS) optimization solver and fast heuristics are also proposed for Cell association in the per-small-Cell WBBA scenario. It is shown that when all small Cells have to use in-band wireless backhaul, the system load has more impact on both the sum log-rate and per-user rate performance than the number of small Cells deployed within the macro Cell range. The proposed joint CA-WBBA algorithms have an optimal load approximately equal to the size of the large-scale antenna array at the macro BS. The Cell range expansion (CRE) strategy, which is an efficient Cell association scheme for HetNets with perfect backhauling, is shown to be inefficient when in-band wireless backhauling for small Cells comes into play.

Ekram Hossain - One of the best experts on this subject based on the ideXlab platform.

  • joint downlink Cell association and Bandwidth allocation for wireless backhauling in two tier hetnets with large scale antenna arrays
    IEEE Transactions on Wireless Communications, 2016
    Co-Authors: Ning Wang, Ekram Hossain, V.k. Bhargava
    Abstract:

    The problem of joint downlink Cell association (CA) and wireless backhaul Bandwidth allocation (WBBA) in two-tier Cellular heterogeneous networks (HetNets) is investigated. Large-scale antenna array is implemented at the macro base station (BS), while the small Cells within the macro Cell range are single-antenna BSs and they rely on over-the-air links to the macro BS for backhauling. A sum logarithmic user rate maximization problem is studied under the wireless backhaul constraints. Duplex and spectrum sharing with co-channel reverse time-division duplex (TDD) and dynamic soft frequency reuse is considered for interference management in the two-tier HetNet employing large-scale antenna arrays at the macro BS and wireless backhauling for small Cells. Two in-band WBBA scenarios, namely, unified Bandwidth allocation and per-small-Cell Bandwidth allocation, are investigated for joint CA-WBBA in the HetNet. A two-level hierarchical decomposition method for relaxed optimization is employed to solve the mixed-integer nonlinear program (MINLP). Solutions based on the General Algorithm Modeling System (GAMS) optimization solver and fast heuristics are also proposed for Cell association in the per-small-Cell WBBA scenario. It is shown that when all small Cells have to use in-band wireless backhaul, the system load has more impact on both the sum logarithmic rate and per-user rate performance than the number of small Cells deployed within the macro Cell range. The proposed joint CA-WBBA algorithms have an optimal load approximately equal to the size of the large-scale antenna array at the macro BS. The Cell range expansion (CRE) strategy, which is an efficient Cell association scheme for HetNets with ideal backhauling, is shown to be inefficient when in-band wireless backhauling for small Cells comes into play.

  • joint downlink Cell association and Bandwidth allocation for wireless backhauling in two tier hetnets with large scale antenna arrays
    arXiv: Networking and Internet Architecture, 2014
    Co-Authors: Ning Wang, Ekram Hossain, V.k. Bhargava
    Abstract:

    The problem of joint downlink Cell association (CA) and wireless backhaul Bandwidth allocation (WBBA) in two-tier Cellular heterogeneous networks (HetNets) is considered. Large-scale antenna array is implemented at the macro base station (BS), while the small Cells within the macro Cell range are single-antenna BSs and they rely on over-the-air links to the macro BS for backhauling. A sum logarithmic user rate maximization problem is investigated considering wireless backhauling constraints. A duplex and spectrum sharing scheme based on co-channel reverse time-division duplex (TDD) and dynamic soft frequency reuse (SFR) is proposed for interference management in two-tier HetNets with large-scale antenna arrays at the macro BS and wireless backhauling for small Cells. Two in-band WBBA scenarios, namely, unified Bandwidth allocation and per-small-Cell Bandwidth allocation scenarios, are investigated for joint CA-WBBA in the HetNet. A two-level hierarchical decomposition method for relaxed optimization is employed to solve the mixed-integer nonlinear program (MINLP). Solutions based on the General Algorithm Modeling System (GAMS) optimization solver and fast heuristics are also proposed for Cell association in the per-small-Cell WBBA scenario. It is shown that when all small Cells have to use in-band wireless backhaul, the system load has more impact on both the sum log-rate and per-user rate performance than the number of small Cells deployed within the macro Cell range. The proposed joint CA-WBBA algorithms have an optimal load approximately equal to the size of the large-scale antenna array at the macro BS. The Cell range expansion (CRE) strategy, which is an efficient Cell association scheme for HetNets with perfect backhauling, is shown to be inefficient when in-band wireless backhauling for small Cells comes into play.

Tatsuya Suda - One of the best experts on this subject based on the ideXlab platform.

  • an adaptive Bandwidth reservation scheme for high speed multimedia wireless networks
    IEEE Journal on Selected Areas in Communications, 1998
    Co-Authors: C Oliveira, Tatsuya Suda
    Abstract:

    In the next generation high-speed wireless networks, it is important to provide quality-of-service (QoS) guarantees as they are expected to support multimedia applications. This paper proposes an admission control scheme based on adaptive Bandwidth reservation to provide QoS guarantees for multimedia traffic carried in high-speed wireless Cellular networks. The proposed scheme allocates Bandwidth to a connection in the Cell where the connection request originates and reserves Bandwidth in all neighboring Cells. When a user moves to a new Cell and a handoff occurs, Bandwidth is allocated in the new Cell, Bandwidth is reserved in the new Cell's neighboring Cells, and reserved Bandwidth in more distant Cells is released. The amount of Bandwidth to reserve is dynamically adjusted, reflecting the current network conditions. The performance of the proposed scheme is evaluated through simulations of realistic Cellular environments. The simulated network consists of a large number of Cells, mobile users with various movement patterns are assumed, and a variety of multimedia applications (e.g., audio phone, video conference, video on demand, file transfer, etc.) is considered. It is shown that the proposed scheme provides small handoff dropping probability (i.e., the probability that handoff connections are dropped due to a lack of Bandwidth) and achieves high Bandwidth utilization.

Weihua Zhuang - One of the best experts on this subject based on the ideXlab platform.

  • multi service load sharing for resource management in the Cellular wlan integrated network
    IEEE Transactions on Wireless Communications, 2009
    Co-Authors: Wei Song, Weihua Zhuang
    Abstract:

    With the interworking between a Cellular network and wireless local area networks (WLANs), an essential aspect of resource management is taking advantage of the overlay network structure to efficiently share the multi-service traffic load between the interworked systems. In this study, we propose a new load sharing scheme for voice and elastic data services in a Cellular/WLAN integrated network. Admission control and dynamic vertical handoff are applied to pool the free Bandwidths of the two systems to effectively serve elastic data traffic and improve the multiplexing gain. To further combat the Cell Bandwidth limitation, data calls in the Cell are served under an efficient service discipline, referred to as shortest remaining processing time (SRPT). The SRPT can well exploit the heavy-tailedness of data call size to improve the resource utilization. An accurate analytical model is developed to determine an appropriate size threshold so that data calls are properly distributed to the integrated Cell and WLAN, taking into account the load conditions and traffic characteristics. It is observed from extensive simulation and numerical analysis that the new scheme significantly improves the overall system performance.