The Experts below are selected from a list of 1050 Experts worldwide ranked by ideXlab platform
Kandaraj Piamrat - One of the best experts on this subject based on the ideXlab platform.
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Punishment Protocol for Backoff Manipulation in MAC IEEE 802.11
2006 International Symposium on Communications and Information Technologies, 2006Co-Authors: Kandaraj PiamratAbstract:Wireless Network is now everywhere, therefore, competing for access to Wireless channel is becoming an important issue. The IEEE 802.11 Wireless standard requires nodes contending for channel access to wait for a "backoff" interval, randomly selected from a specified range, before initiating a transmission. However, today's Wireless Network Adapter provides users with possibility to configure protocol parameter hence CSMA/CA access method may not work properly. Selfish users may disobey the rules by choosing smaller backoff value resulting in unfair throughput advantage. Although, there is a correction protocol proposed but it comes with the new MAC protocol. This new protocol is incompatible with the original standard and thus infeasible to be deployed. In this paper, we present a new punishment protocol which can be incrementally applied to any Wireless access point. In addition, it can be used with any detection scheme without any change in an original MAC protocol
Qian Wang - One of the best experts on this subject based on the ideXlab platform.
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New Multifunctional Industrial Wireless Network Adapter
Energy Procedia, 2017Co-Authors: Wang Fudong, Zhongfeng Wang, Kai Chang, Huang Jianlong, Qian WangAbstract:Abstract: Design has realized a new multifunctional industrial Wireless Network Adapter. The purpose of this design is to avoid the isolated information island in an industrial system, and allow devices with different types of communication protocol to form one industrial Network. It has realized by hardware and software. On the hardware side, the device is composed of MCU, power supply module, two rs232 communication modules, one rs485 communication module, two ethernet communication modules and the watchdog. On the software side, the Adapter integrates the protocols of Modbus TCP, Modbus RTU, rs232 transparent transmission, rs485 transparent transmission, TCP server transparent transmission, TCP client transparent transmission and UDP transparent transmission. Because the device has realized the calibration algorithm, it can control rs232-HART protocol converter to achieve interconnection of the HART equipment. One of the rs232 port is used to interconnection of a Wireless communication module. The Wireless communication module is designed by ourselves, the Wireless modules can automatically form a Network of each other and communication with the host. Now the multifunctional industrial Wireless Network Adapter has been tested and verified that it can make multiple equipments with different communication protocols form one Network and works steadily.
Srivaths Ravi - One of the best experts on this subject based on the ideXlab platform.
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DATE - Transport Protocol Optimization for Energy Efficient Wireless Embedded Systems
2003 Design Automation and Test in Europe Conference and Exhibition, 1Co-Authors: Davide Bertozzi, Anand Raghunathan, Luca Benini, Srivaths RaviAbstract:For Wireless embedded systems, the power consumption in the Network interface (radio) plays a dominant role in determining battery life. In this paper, we explore transport protocol optimizations for reducing the energy consumption of Wireless LAN interfaces. Our work is based on the observation that, the transport protocol, which implements flow control to regulate the Network traffic, plays a significant role in determining the workload of the Network interface. Hence, by monitoring run-time parameters in the transport protocol, coarse-granularity idle periods, which present the best opportunities for Network interface power reduction, can be accurately identified. We further show that, by tuning parameters in the protocol software implementation, we can shape the activity profile of the Network interface, making it more energy efficient while remaining compliant to the TCP standard. We have performed extensive current measurements using an experimental testbed that consists of a Compaq iPAQ PDA with a Cisco Aironet Wireless Network Adapter, to validate the proposed techniques. Our measurements indicate energy savings ranging from 28% to 69% compared to the use of state-of-the-art MAC layer power reduction techniques, with little or no impact on performance.
Wang Fudong - One of the best experts on this subject based on the ideXlab platform.
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New Multifunctional Industrial Wireless Network Adapter
Energy Procedia, 2017Co-Authors: Wang Fudong, Zhongfeng Wang, Kai Chang, Huang Jianlong, Qian WangAbstract:Abstract: Design has realized a new multifunctional industrial Wireless Network Adapter. The purpose of this design is to avoid the isolated information island in an industrial system, and allow devices with different types of communication protocol to form one industrial Network. It has realized by hardware and software. On the hardware side, the device is composed of MCU, power supply module, two rs232 communication modules, one rs485 communication module, two ethernet communication modules and the watchdog. On the software side, the Adapter integrates the protocols of Modbus TCP, Modbus RTU, rs232 transparent transmission, rs485 transparent transmission, TCP server transparent transmission, TCP client transparent transmission and UDP transparent transmission. Because the device has realized the calibration algorithm, it can control rs232-HART protocol converter to achieve interconnection of the HART equipment. One of the rs232 port is used to interconnection of a Wireless communication module. The Wireless communication module is designed by ourselves, the Wireless modules can automatically form a Network of each other and communication with the host. Now the multifunctional industrial Wireless Network Adapter has been tested and verified that it can make multiple equipments with different communication protocols form one Network and works steadily.
Davide Bertozzi - One of the best experts on this subject based on the ideXlab platform.
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DATE - Transport Protocol Optimization for Energy Efficient Wireless Embedded Systems
2003 Design Automation and Test in Europe Conference and Exhibition, 1Co-Authors: Davide Bertozzi, Anand Raghunathan, Luca Benini, Srivaths RaviAbstract:For Wireless embedded systems, the power consumption in the Network interface (radio) plays a dominant role in determining battery life. In this paper, we explore transport protocol optimizations for reducing the energy consumption of Wireless LAN interfaces. Our work is based on the observation that, the transport protocol, which implements flow control to regulate the Network traffic, plays a significant role in determining the workload of the Network interface. Hence, by monitoring run-time parameters in the transport protocol, coarse-granularity idle periods, which present the best opportunities for Network interface power reduction, can be accurately identified. We further show that, by tuning parameters in the protocol software implementation, we can shape the activity profile of the Network interface, making it more energy efficient while remaining compliant to the TCP standard. We have performed extensive current measurements using an experimental testbed that consists of a Compaq iPAQ PDA with a Cisco Aironet Wireless Network Adapter, to validate the proposed techniques. Our measurements indicate energy savings ranging from 28% to 69% compared to the use of state-of-the-art MAC layer power reduction techniques, with little or no impact on performance.
