The Experts below are selected from a list of 7761 Experts worldwide ranked by ideXlab platform

Tony Q.s. Quek - One of the best experts on this subject based on the ideXlab platform.

  • Joint Uplink and Downlink Resource Configuration for Ultra-reliable and Low-latency Communications
    IEEE Transactions on Communications, 2018
    Co-Authors: Changyang She, Chenyang Yang, Tony Q.s. Quek
    Abstract:

    Supporting ultra-reliable and low-latency communications (URLLC) is one of the major goals for the fifth-generation cellular networks. Since spectrum usage efficiency is always a concern, and large bandwidth is required for ensuring stringent quality-of-service (QoS), we minimize the total bandwidth under the QoS constraints of URLLC. We first propose a packet delivery mechanism for URLLC. To reduce the required bandwidth for ensuring queueing delay, we consider a statistical multiplexing queueing mode, where the packets to be sent to different devices are waiting in one queue at the base station, and broadcast mode is adopted in Downlink transmission. In this way, Downlink bandwidth is shared among packets of multiple devices. In uplink transmission, different subchannels are allocated to different devices to avoid strong interference. Then, we jointly optimize uplink and Downlink bandwidth configuration and delay components to minimize the total bandwidth required to guarantee the overall packet loss and end-to-end delay, which includes uplink and Downlink transmission delays, queueing delay and backhaul delay. We propose a two-step method to find the optimal solution. Simulation and numerical results validate our analysis and show remarkable performance gain by jointly optimizing uplink and Downlink configuration.

  • Joint Uplink and Downlink Resource Configuration for Ultra-Reliable and Low-Latency Communications
    IEEE Transactions on Communications, 2018
    Co-Authors: Chenyang Yang, Tony Q.s. Quek
    Abstract:

    Supporting ultra-reliable and low-latency communications (URLLC) is one of the major goals for the fifth-generation cellular networks. Since spectrum usage efficiency is always a concern, and large bandwidth is required for ensuring stringent quality-of-service (QoS), we minimize the total bandwidth under the QoS constraints of URLLC. We first propose a packet delivery mechanism for URLLC. To reduce the required bandwidth for ensuring queueing delay, we consider a statistical multiplexing queueing mode, where the packets to be sent to different devices are waiting in one queue at the base station, and broadcast mode is adopted in Downlink transmission. In this way, Downlink bandwidth is shared among packets of multiple devices. In uplink transmission, orthogonal subchannels are allocated to different devices to avoid strong interference. Then, we jointly optimize uplink and Downlink bandwidth configuration and delay components to minimize the total bandwidth required to guarantee the overall packet loss and end-to-end delay, which includes uplink and Downlink transmission delays, queueing delay, and backhaul delay. We propose a two-step method to find the optimal solution. Simulation and numerical results validate our analysis and show remarkable performance gain by jointly optimizing uplink and Downlink configuration.

Jon W Mark - One of the best experts on this subject based on the ideXlab platform.

  • Downlink Resource management for packet transmission in ofdm wireless communication systems
    IEEE Transactions on Wireless Communications, 2005
    Co-Authors: Jun Cai, Xuemin Shen, Jon W Mark
    Abstract:

    In this paper, an optimal Downlink Resource management scheme for heterogeneous packet transmission in orthogonal frequency-division multiplexing (OFDM) wireless communication systems is proposed. By making use of the channel impulse response and the properties of the OFDM physical layer, a Resource management scheme is developed by integrating power distribution, subcarrier allocation, and the generalized processor sharing (GPS) scheduling. The scheme can: 1) maximize system throughput; 2) guarantee the required signal-to-noise ratio for heterogeneous traffic; 3) provide fairness to all the traffic admitted in the system; and 4) satisfy the total transmission power constraint. For practical implementation, a simplified power and subcarrier allocation algorithm, a robust H/sub /spl infin// channel estimation algorithm, and a truncated GPS (TGPS) scheduling scheme are introduced. Simulation results show that the proposed Resource management scheme exhibits good throughput performance.

  • Downlink Resource management for packet transmission in ofdm wireless communication systems
    Global Communications Conference, 2003
    Co-Authors: Jun Cai, Xuemin Shen, Jon W Mark
    Abstract:

    In this paper, Downlink Resource management scheme is proposed for heterogeneous packet transmission in orthogonal frequency-division multiplexing (OFDM) wireless communication systems. By making use of the properties in the physical layer of the OFDM system, the Resource management scheme is developed by integrating power allocation, subcarrier allocation, and generalized processor sharing (GPS) scheduling. With the scheme, maximum system throughput can be achieved, while guaranteeing the required signal-to-noise ratio (SNR) for heterogeneous traffic, providing fairness to all the traffic in the system, and satisfying the total transmission power constraint. For practical implementation, a truncated GPS (TGPS) scheduling and a simplified power and subcarrier allocation algorithm are introduced. Simulation results are given to demonstrate the performance of the proposed Resource management scheme.

Chenyang Yang - One of the best experts on this subject based on the ideXlab platform.

  • Joint Uplink and Downlink Resource Configuration for Ultra-reliable and Low-latency Communications
    IEEE Transactions on Communications, 2018
    Co-Authors: Changyang She, Chenyang Yang, Tony Q.s. Quek
    Abstract:

    Supporting ultra-reliable and low-latency communications (URLLC) is one of the major goals for the fifth-generation cellular networks. Since spectrum usage efficiency is always a concern, and large bandwidth is required for ensuring stringent quality-of-service (QoS), we minimize the total bandwidth under the QoS constraints of URLLC. We first propose a packet delivery mechanism for URLLC. To reduce the required bandwidth for ensuring queueing delay, we consider a statistical multiplexing queueing mode, where the packets to be sent to different devices are waiting in one queue at the base station, and broadcast mode is adopted in Downlink transmission. In this way, Downlink bandwidth is shared among packets of multiple devices. In uplink transmission, different subchannels are allocated to different devices to avoid strong interference. Then, we jointly optimize uplink and Downlink bandwidth configuration and delay components to minimize the total bandwidth required to guarantee the overall packet loss and end-to-end delay, which includes uplink and Downlink transmission delays, queueing delay and backhaul delay. We propose a two-step method to find the optimal solution. Simulation and numerical results validate our analysis and show remarkable performance gain by jointly optimizing uplink and Downlink configuration.

  • Joint Uplink and Downlink Resource Configuration for Ultra-Reliable and Low-Latency Communications
    IEEE Transactions on Communications, 2018
    Co-Authors: Chenyang Yang, Tony Q.s. Quek
    Abstract:

    Supporting ultra-reliable and low-latency communications (URLLC) is one of the major goals for the fifth-generation cellular networks. Since spectrum usage efficiency is always a concern, and large bandwidth is required for ensuring stringent quality-of-service (QoS), we minimize the total bandwidth under the QoS constraints of URLLC. We first propose a packet delivery mechanism for URLLC. To reduce the required bandwidth for ensuring queueing delay, we consider a statistical multiplexing queueing mode, where the packets to be sent to different devices are waiting in one queue at the base station, and broadcast mode is adopted in Downlink transmission. In this way, Downlink bandwidth is shared among packets of multiple devices. In uplink transmission, orthogonal subchannels are allocated to different devices to avoid strong interference. Then, we jointly optimize uplink and Downlink bandwidth configuration and delay components to minimize the total bandwidth required to guarantee the overall packet loss and end-to-end delay, which includes uplink and Downlink transmission delays, queueing delay, and backhaul delay. We propose a two-step method to find the optimal solution. Simulation and numerical results validate our analysis and show remarkable performance gain by jointly optimizing uplink and Downlink configuration.

Jun Cai - One of the best experts on this subject based on the ideXlab platform.

  • Downlink Resource management for packet transmission in ofdm wireless communication systems
    IEEE Transactions on Wireless Communications, 2005
    Co-Authors: Jun Cai, Xuemin Shen, Jon W Mark
    Abstract:

    In this paper, an optimal Downlink Resource management scheme for heterogeneous packet transmission in orthogonal frequency-division multiplexing (OFDM) wireless communication systems is proposed. By making use of the channel impulse response and the properties of the OFDM physical layer, a Resource management scheme is developed by integrating power distribution, subcarrier allocation, and the generalized processor sharing (GPS) scheduling. The scheme can: 1) maximize system throughput; 2) guarantee the required signal-to-noise ratio for heterogeneous traffic; 3) provide fairness to all the traffic admitted in the system; and 4) satisfy the total transmission power constraint. For practical implementation, a simplified power and subcarrier allocation algorithm, a robust H/sub /spl infin// channel estimation algorithm, and a truncated GPS (TGPS) scheduling scheme are introduced. Simulation results show that the proposed Resource management scheme exhibits good throughput performance.

  • Downlink Resource management for packet transmission in ofdm wireless communication systems
    Global Communications Conference, 2003
    Co-Authors: Jun Cai, Xuemin Shen, Jon W Mark
    Abstract:

    In this paper, Downlink Resource management scheme is proposed for heterogeneous packet transmission in orthogonal frequency-division multiplexing (OFDM) wireless communication systems. By making use of the properties in the physical layer of the OFDM system, the Resource management scheme is developed by integrating power allocation, subcarrier allocation, and generalized processor sharing (GPS) scheduling. With the scheme, maximum system throughput can be achieved, while guaranteeing the required signal-to-noise ratio (SNR) for heterogeneous traffic, providing fairness to all the traffic in the system, and satisfying the total transmission power constraint. For practical implementation, a truncated GPS (TGPS) scheduling and a simplified power and subcarrier allocation algorithm are introduced. Simulation results are given to demonstrate the performance of the proposed Resource management scheme.

Qi Liao - One of the best experts on this subject based on the ideXlab platform.

  • dynamic uplink Downlink Resource management in flexible duplex enabled wireless networks
    arXiv: Signal Processing, 2017
    Co-Authors: Qi Liao
    Abstract:

    Flexible duplex is proposed to adapt to the channel and traffic asymmetry for future wireless networks. In this paper, we propose two novel algorithms within the flexible duplex framework for joint uplink and Downlink Resource allocation in multi-cell scenario, named SAFP and RMDI, based on the awareness of interference coupling among wireless links. Numerical results show significant performance gain over the baseline system with fixed uplink/Downlink Resource configuration, and over the dynamic TDD scheme that independently adapts the configuration to time-varying traffic volume in each cell. The proposed algorithms achieve two-fold increase when compared with the baseline scheme, measured by the worst-case quality of service satisfaction level, under a low level of traffic asymmetry. The gain is more significant when the traffic is highly asymmetric, as it achieves three-fold increase.

  • dynamic uplink Downlink Resource management in flexible duplex enabled wireless networks
    International Conference on Communications, 2017
    Co-Authors: Qi Liao
    Abstract:

    Flexible duplex is proposed to adapt to the channel and traffic asymmetry for future wireless networks [1]. In this paper, we propose two novel algorithms within the flexible duplex framework for joint uplink and Downlink Resource allocation in multi-cell scenario, named successive approximation of fixed point (SAFP) and Resource muting for dominant interferer (RMDI), based on the awareness of interference coupling among wireless links. Numerical results show significant performance gain over the baseline system with fixed uplink/Downlink Resource configuration, and over the dynamic time division duplex (TDD) scheme that independently adapts the configuration to time-varying traffic volume in each cell. The proposed algorithms achieve two-fold increase when compared with the baseline scheme, measured by the worst-case quality of service satisfaction level, under a low level of traffic asymmetry. The gain is more significant when the traffic is highly asymmetric, as it achieves three-fold increase.