The Experts below are selected from a list of 7206 Experts worldwide ranked by ideXlab platform
Zhisheng Niu - One of the best experts on this subject based on the ideXlab platform.
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A Wait-and-See Two-Threshold Optimal Sleeping Policy for a Single Server With Bursty Traffic
IEEE Transactions on Green Communications and Networking, 2017Co-Authors: Bingjie Leng, Bhaskar Krishnamachari, Xueying Guo, Xi Zheng, Zhisheng NiuAbstract:Making idle servers sleep is considered to be a key approach to reducing energy consumption of various information and communication systems. Optimal sleeping policies for a single server have been derived only for non-Bursty Traffic in prior work. In this paper, for the first time, we study the optimal sleeping operation for a single server with Bursty Traffic to answer the question of whether server sleeping can bring extra benefit with Bursty Traffic or not. Key factors including switchover energy consumption as well as delay performance are considered. We formulate the problem as a partially observable Markov decision process, and show that it can be solved by observing time elapsed since the last arrival. The optimal sleeping policy is shown to be a two-threshold policy with a wait-and-see feature, i.e., the server would wait a period of time to see if there are any extra arrivals before switching modes. Simulation results show that with the optimal sleeping mechanism, Traffic burstiness can enhance system performance on energy cost and delay penalty.
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optimal operation of a green server with Bursty Traffic
Global Communications Conference, 2016Co-Authors: Bingjie Leng, Bhaskar Krishnamachari, Xueying Guo, Zhisheng NiuAbstract:To reduce the energy consumption of various information and communication systems, sleeping mechanism design is considered to be a key problem. Prior work has derived optimal single server sleeping policies only for non-Bursty, memoryless Poisson arrivals. In this paper, for the first time, we derive the optimal sleep operation for a single server facing Bursty Traffic arrivals. Specifically, we model job arrivals as a discrete-time interrupted Bernoulli process (IBP) which models Bursty Traffic arrivals. Key factors including the switching and working energy consumption costs as well as a delay penalty are accounted for in our model. As the arrival process state (busy or quiet) cannot be directly observed by the server, we formulate the problem as a POMDP (partially observable Markov decision process), and show that it can be tractably solved as a belief-MDP by considering the time interval since the last observed arrival t. We prove that the optimal sleeping policy is hysteretic and the numerical results reveal that the optimal policy is a t-based two- threshold policy, where the sleeping thresholds change with t. The simulation results show that our policy outperforms the previously derived Poisson-optimal policy and that the system cost decreases with the burstiness of Traffic.
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base station sleeping control and power matching for energy delay tradeoffs with Bursty Traffic
IEEE Transactions on Vehicular Technology, 2016Co-Authors: Yanan Bao, Guowang Miao, Sheng Zhou, Zhisheng NiuAbstract:In this paper, we study sleeping control (SC) and power matching (PM) for a single cell in cellular networks with Bursty Traffic. The base station (BS) sleeps whenever the system is empty and wakes up when N users are assembled during the sleep period. The service capacity of the BS in the active mode is controlled by adjusting its transmit power. The total power consumption and average delay are analyzed, and based on this, the impact of parameter N and transmit power on the energy–delay tradeoff is studied. It is shown that, given the average Traffic load, the more Bursty the Traffic is, the less total power consumed, although the delay performance of more Bursty Traffic is better only under certain circumstances. The optimal energy–delay tradeoff is then obtained through joint SC and PM optimization. The relationship between the optimal control parameters and the asymptotic performance are also provided. Moreover, the influence of the Traffic autocorrelation is explored, which shows less impact on the system performance compared with that of the burstiness. Numerical results show the energy saving gain of the joint SC and PM scheme, as well as the impact of burstiness on the optimal energy–delay tradeoff.
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GLOBECOM - Optimal Operation of a Green Server with Bursty Traffic
2016 IEEE Global Communications Conference (GLOBECOM), 2016Co-Authors: Bingjie Leng, Bhaskar Krishnamachari, Xueying Guo, Zhisheng NiuAbstract:To reduce the energy consumption of various information and communication systems, sleeping mechanism design is considered to be a key problem. Prior work has derived optimal single server sleeping policies only for non-Bursty, memoryless Poisson arrivals. In this paper, for the first time, we derive the optimal sleep operation for a single server facing Bursty Traffic arrivals. Specifically, we model job arrivals as a discrete-time interrupted Bernoulli process (IBP) which models Bursty Traffic arrivals. Key factors including the switching and working energy consumption costs as well as a delay penalty are accounted for in our model. As the arrival process state (busy or quiet) cannot be directly observed by the server, we formulate the problem as a POMDP (partially observable Markov decision process), and show that it can be tractably solved as a belief-MDP by considering the time interval since the last observed arrival t. We prove that the optimal sleeping policy is hysteretic and the numerical results reveal that the optimal policy is a t-based two- threshold policy, where the sleeping thresholds change with t. The simulation results show that our policy outperforms the previously derived Poisson-optimal policy and that the system cost decreases with the burstiness of Traffic.
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Base-Station Sleeping Control and Power Matching for Energy–Delay Tradeoffs With Bursty Traffic
IEEE Transactions on Vehicular Technology, 2016Co-Authors: Yanan Bao, Guowang Miao, Sheng Zhou, Zhisheng NiuAbstract:In this paper, we study sleeping control (SC) and power matching (PM) for a single cell in cellular networks with Bursty Traffic. The base station (BS) sleeps whenever the system is empty and wakes up when N users are assembled during the sleep period. The service capacity of the BS in the active mode is controlled by adjusting its transmit power. The total power consumption and average delay are analyzed, and based on this, the impact of parameter N and transmit power on the energy-delay tradeoff is studied. It is shown that, given the average Traffic load, the more Bursty the Traffic is, the less total power consumed, although the delay performance of more Bursty Traffic is better only under certain circumstances. The optimal energy-delay tradeoff is then obtained through joint SC and PM optimization. The relationship between the optimal control parameters and the asymptotic performance are also provided. Moreover, the influence of the Traffic autocorrelation is explored, which shows less impact on the system performance compared with that of the burstiness. Numerical results show the energy saving gain of the joint SC and PM scheme, as well as the impact of burstiness on the optimal energy-delay tradeoff.
Wook Hyun Kwon - One of the best experts on this subject based on the ideXlab platform.
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ecap a Bursty Traffic adaptation algorithm for ieee 802 15 4 beacon enabled networks
Vehicular Technology Conference, 2007Co-Authors: Jae Yeol Ha, Joseph Jeon, Wook Hyun KwonAbstract:In IEEE 802.15.4 beacon-enabled networks, the length of active periods should be configured appropriately in order to save energy and accommodate Traffic. This paper proposes ECAP, a Bursty Traffic adaptation algorithm for IEEE 802.15.4 beacon-enabled networks. To accommodate Bursty Traffic, the proposed algorithm is designed to extend the active periods dynamically based on the requests from devices. The simulation results show the performance enhancement in terms of end-to-end delay and energy consumption per packet transmission
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ecap a Bursty Traffic adaptation algorithm for ieee 802 15 4 beacon enabled networks
Vehicular Technology Conference, 2007Co-Authors: Jae Yeol Ha, Joseph Jeon, Wook Hyun KwonAbstract:In IEEE 802.15.4 beacon-enabled networks, the length of active periods should be configured appropriately in order to save energy and accommodate Traffic. This paper proposes ECAP, a Bursty Traffic adaptation algorithm for IEEE 802.15.4 beacon-enabled networks. To accommodate Bursty Traffic, the proposed algorithm is designed to extend the active periods dynamically based on the requests from devices. The simulation results show the performance enhancement in terms of end-to-end delay and energy consumption per packet transmission
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VTC Spring - ECAP: A Bursty Traffic Adaptation Algorithm for IEEE 802.15.4 Beacon-Enabled Networks
2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007Co-Authors: Jong-wook Lee, Joseph Jeon, Dong-sung Kim, Wook Hyun KwonAbstract:In IEEE 802.15.4 beacon-enabled networks, the length of active periods should be configured appropriately in order to save energy and accommodate Traffic. This paper proposes ECAP, a Bursty Traffic adaptation algorithm for IEEE 802.15.4 beacon-enabled networks. To accommodate Bursty Traffic, the proposed algorithm is designed to extend the active periods dynamically based on the requests from devices. The simulation results show the performance enhancement in terms of end-to-end delay and energy consumption per packet transmission
Andreas S. Pomportsis - One of the best experts on this subject based on the ideXlab platform.
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A MAC Protocol for Bursty Traffic Ad-Hoc Wireless LANs with Energy Efficiency
Wireless Personal Communications, 2011Co-Authors: Petros Nicopolitidis, Georgios I. Papadimitriou, Andreas S. PomportsisAbstract:A Self-Adaptive Low Power MAC protocol with carrier sensing for ad-hoc Wireless LANs (WLANs), which is capable of operating efficiently under Bursty Traffic is proposed in this letter. The protocol utilizes a Learning Automaton structure at each station of the WLAN. Each such structure uses the network feedback to select the mobile station that will transmit. A low-power mode is implemented in order to significantly reduce the energy consumption of the protocol. Simulation results reveal that the low power mode of the proposed protocol reduces the average energy consumption at the mobile stations by as much as 70%.
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Adaptive MAC protocols for broadcast networks with Bursty Traffic
IEEE Transactions on Communications, 2003Co-Authors: Georgios I. Papadimitriou, Andreas S. PomportsisAbstract:An adaptive medium access control protocol for broadcast networks, which is capable of operating efficiently under Bursty Traffic conditions, is introduced. According to the proposed protocol, the station which grants permission to transmit at each time slot is selected by taking into account the network feedback information. In this way, the number of idle slots is minimized and the network performance is significantly improved. Furthermore, the portion of the bandwidth assigned to each station is dynamically adapted to the station's needs.
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Learning-automata-based TDMA protocols for broadcast communication systems with Bursty Traffic
IEEE Communications Letters, 2000Co-Authors: G I Papadimitriou, Andreas S. PomportsisAbstract:A learning automata-based time-division multiple-access protocol for broadcast networks, which is capable of operating efficiently under Bursty Traffic conditions, is introduced. According to the proposed protocol, the station which grants permission to transmit at each time slot is selected by means of learning automata. The learning automata update the choice probability of each station according to the network feedback information in such a way that it asymptotically tends to be proportional to the probability that this station is ready. In this manner, the number of idle slots is minimized and the network performance is significantly improved. Furthermore, the portion of the bandwidth assigned to each station is dynamically adapted to the station's needs.
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Wavelength-Conversion-Based Protocols for Single-Hop Photonic Networks with Bursty Traffic
Photonic Network Communication, 1999Co-Authors: Georgios I. Papadimitriou, Andreas S. PomportsisAbstract:WDM star networks using fixed lasers and tunable optical filters are favored by the current state-of-the-art in technology over the other WDM star architectural forms. However, networks of this architectural form suffer from low efficiency when the offered Traffic is Bursty. Under Bursty Traffic conditions, it is probable that some wavelengths are idle, while some other wavelengths are overloaded. Therefore, the overall network performance is degraded. In this paper, a new MAC protocol which is capable of operating efficiently under Bursty Traffic conditions is introduced. According to the proposed protocol an array of tunable wavelength converters is placed at the network hub in order to uniformly distribute the incoming packets to the available wavelengths. In this way, the load is balanced between the wavelengths and consequently, the network performance is improved. The performance of the proposed protocol is studied via analytical and simulation results which indicate that a WDM Star network operating under this protocol achieves a high throughput-delay performance under both Bursty and non-Bursty Traffic conditions.
Yanan Bao - One of the best experts on this subject based on the ideXlab platform.
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base station sleeping control and power matching for energy delay tradeoffs with Bursty Traffic
IEEE Transactions on Vehicular Technology, 2016Co-Authors: Yanan Bao, Guowang Miao, Sheng Zhou, Zhisheng NiuAbstract:In this paper, we study sleeping control (SC) and power matching (PM) for a single cell in cellular networks with Bursty Traffic. The base station (BS) sleeps whenever the system is empty and wakes up when N users are assembled during the sleep period. The service capacity of the BS in the active mode is controlled by adjusting its transmit power. The total power consumption and average delay are analyzed, and based on this, the impact of parameter N and transmit power on the energy–delay tradeoff is studied. It is shown that, given the average Traffic load, the more Bursty the Traffic is, the less total power consumed, although the delay performance of more Bursty Traffic is better only under certain circumstances. The optimal energy–delay tradeoff is then obtained through joint SC and PM optimization. The relationship between the optimal control parameters and the asymptotic performance are also provided. Moreover, the influence of the Traffic autocorrelation is explored, which shows less impact on the system performance compared with that of the burstiness. Numerical results show the energy saving gain of the joint SC and PM scheme, as well as the impact of burstiness on the optimal energy–delay tradeoff.
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Base-Station Sleeping Control and Power Matching for Energy–Delay Tradeoffs With Bursty Traffic
IEEE Transactions on Vehicular Technology, 2016Co-Authors: Yanan Bao, Guowang Miao, Sheng Zhou, Zhisheng NiuAbstract:In this paper, we study sleeping control (SC) and power matching (PM) for a single cell in cellular networks with Bursty Traffic. The base station (BS) sleeps whenever the system is empty and wakes up when N users are assembled during the sleep period. The service capacity of the BS in the active mode is controlled by adjusting its transmit power. The total power consumption and average delay are analyzed, and based on this, the impact of parameter N and transmit power on the energy-delay tradeoff is studied. It is shown that, given the average Traffic load, the more Bursty the Traffic is, the less total power consumed, although the delay performance of more Bursty Traffic is better only under certain circumstances. The optimal energy-delay tradeoff is then obtained through joint SC and PM optimization. The relationship between the optimal control parameters and the asymptotic performance are also provided. Moreover, the influence of the Traffic autocorrelation is explored, which shows less impact on the system performance compared with that of the burstiness. Numerical results show the energy saving gain of the joint SC and PM scheme, as well as the impact of burstiness on the optimal energy-delay tradeoff.
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base station sleeping and power control for Bursty Traffic in cellular networks
International Conference on Communications, 2014Co-Authors: Yanan Bao, Guowang Miao, Zhisheng NiuAbstract:In this paper, we study sleeping and power control of a single-cell cellular network with Bursty Traffic. The base station (BS) sleeps whenever the system is empty, and wakes up when N users are assembled. The service capacity of the BS in the active mode is controlled through its transmitting power. The total power consumption and average delay for Bursty Traffic that follows the Interrupted Poisson Process (IPP) are analyzed. We discuss when the BS should sleep and the impact of Traffic burstiness on it. The impact of the sleeping threshold and the transmitting power on the system performance is also investigated. The numerical results show that given the average Traffic load, the more Bursty the Traffic is, the less the total power is consumed, while the delay performance of the more Bursty Traffic is better only under certain circumstances.
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ICC Workshops - Base station sleeping and power control for Bursty Traffic in cellular networks
2014 IEEE International Conference on Communications Workshops (ICC), 2014Co-Authors: Yanan Bao, Guowang Miao, Zhisheng NiuAbstract:In this paper, we study sleeping and power control of a single-cell cellular network with Bursty Traffic. The base station (BS) sleeps whenever the system is empty, and wakes up when N users are assembled. The service capacity of the BS in the active mode is controlled through its transmitting power. The total power consumption and average delay for Bursty Traffic that follows the Interrupted Poisson Process (IPP) are analyzed. We discuss when the BS should sleep and the impact of Traffic burstiness on it. The impact of the sleeping threshold and the transmitting power on the system performance is also investigated. The numerical results show that given the average Traffic load, the more Bursty the Traffic is, the less the total power is consumed, while the delay performance of the more Bursty Traffic is better only under certain circumstances.
Georgios I. Papadimitriou - One of the best experts on this subject based on the ideXlab platform.
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A MAC Protocol for Bursty Traffic Ad-Hoc Wireless LANs with Energy Efficiency
Wireless Personal Communications, 2011Co-Authors: Petros Nicopolitidis, Georgios I. Papadimitriou, Andreas S. PomportsisAbstract:A Self-Adaptive Low Power MAC protocol with carrier sensing for ad-hoc Wireless LANs (WLANs), which is capable of operating efficiently under Bursty Traffic is proposed in this letter. The protocol utilizes a Learning Automaton structure at each station of the WLAN. Each such structure uses the network feedback to select the mobile station that will transmit. A low-power mode is implemented in order to significantly reduce the energy consumption of the protocol. Simulation results reveal that the low power mode of the proposed protocol reduces the average energy consumption at the mobile stations by as much as 70%.
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A high performance MAC protocol for broadcast LANs with Bursty Traffic
Computer Communications, 2006Co-Authors: Georgios I. PapadimitriouAbstract:An new medium access control protocol for broadcast LANs, which is capable of achieving a high performance under Bursty Traffic conditions, is introduced. According to the proposed protocol, the network stations are separated into groups. All the groups are granted permission to transmit in a round-robin fashion. The main objective of the grouping algorithm is to have exactly one ready station in each group. In this way, idle slots and collisions are minimized and a nearly optimal throughput-delay performance is achieved. The grouping of stations is dynamically modified at each time slot according to the network feedback information. Due to the dynamic nature of the grouping algorithm, the protocol is capable of being adapted to the sharp changes of the stations' Traffic.
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Adaptive MAC protocols for broadcast networks with Bursty Traffic
IEEE Transactions on Communications, 2003Co-Authors: Georgios I. Papadimitriou, Andreas S. PomportsisAbstract:An adaptive medium access control protocol for broadcast networks, which is capable of operating efficiently under Bursty Traffic conditions, is introduced. According to the proposed protocol, the station which grants permission to transmit at each time slot is selected by taking into account the network feedback information. In this way, the number of idle slots is minimized and the network performance is significantly improved. Furthermore, the portion of the bandwidth assigned to each station is dynamically adapted to the station's needs.
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Wavelength-Conversion-Based Protocols for Single-Hop Photonic Networks with Bursty Traffic
Photonic Network Communication, 1999Co-Authors: Georgios I. Papadimitriou, Andreas S. PomportsisAbstract:WDM star networks using fixed lasers and tunable optical filters are favored by the current state-of-the-art in technology over the other WDM star architectural forms. However, networks of this architectural form suffer from low efficiency when the offered Traffic is Bursty. Under Bursty Traffic conditions, it is probable that some wavelengths are idle, while some other wavelengths are overloaded. Therefore, the overall network performance is degraded. In this paper, a new MAC protocol which is capable of operating efficiently under Bursty Traffic conditions is introduced. According to the proposed protocol an array of tunable wavelength converters is placed at the network hub in order to uniformly distribute the incoming packets to the available wavelengths. In this way, the load is balanced between the wavelengths and consequently, the network performance is improved. The performance of the proposed protocol is studied via analytical and simulation results which indicate that a WDM Star network operating under this protocol achieves a high throughput-delay performance under both Bursty and non-Bursty Traffic conditions.
