The Interplay Between Data Transmission Power and Transmission Link Utilization

In a wireless sensor network, sensor nodes are deployed in an ad hoc fashion and they deliver data packets using multihop transmission. However, transmission failures occur frequently in the multihop transmission over wireless media. Thus, a loss recovery mechanism is required to provide end-to-end reliability. In addition, because the sensor nodes are very small devices and have insufficient resources, energy-efficient data transmission is crucial for prolonging the lifetime of a wireless sensor network. This paper proposes a transmission power control mechanism for reliable data transmission, which satisfies communication reliability through recovery of lost packets. The proposed method calculates packet reception rate (PRR) of each hop to maintain end-to-end packet delivery rate (PDR), which is determined based on the desired communication reliability. Then, the transmission power is adjusted based on the PRR to reduce energy consumption. The proposed method was evaluated through extensive simulations, and the results show that it leads to more energy-efficient data transmission compared to existing methods.

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100 Gb/s single VCSEL data transmission link

Optical Fiber Communication Conference ◽

10.1364/ofc.2012.pdp5d.10 ◽

2012 ◽

Cited By ~ 10

Author(s):

R. Rodes ◽

J. Estaran ◽

B. Li ◽

M. Muller ◽

J. B. Jensen ◽

...

Keyword(s):

Data Transmission ◽

Transmission Link

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FPGA based Multichannel Bit Error Rate Tester for Spacecraft Data Acquisition System

International Journal of Reconfigurable and Embedded Systems (IJRES) ◽

10.11591/ijres.v3.i2.pp76-84 ◽

2014 ◽

Vol 3 (2) ◽

pp. 76

Author(s):

Manoj Kumar A ◽

R V Nadagouda ◽

R Jegan

Keyword(s):

Bit Error Rate ◽

Error Rate ◽

Data Transmission ◽

Modulation Scheme ◽

Link Performance ◽

Ethernet Controller ◽

Transmission Link ◽

Spacecraft Data ◽

To Receive ◽

Ber Analysis

Bit Error Rate (BER) is a principle measure of data transmission link performance. BER tester (BERT) consists of a Pattern Generator and an Analyzer that can be set to the same pattern. The payload data transmitted from the spacecraft consists of one, two or three channels per carrier based on the modulation scheme. The traditional equipments can do BER analysis for only one channel at a time. In order to support multichannel BER analysis, a Personal Computer (PC) based system is designed and implemented in Altera Stratix II (EP2S130F1508C5N) FPGA. Ethernet is configured using WIZnet 5300 (Ethernet Controller) and it is used for communication between FPGA and PC with an application. Application is used to transmit the Pattern Generator’s configurations from PC to FPGA and to receive Analyzer’s status. Packet processing is done for this communication using User Datagram protocol (UDP). On the whole, traditional equipments are replaced by the designed and implemented bit error rate tester.

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Directional Pattern versus Omnidirectional Pattern of Switched Beamform Antennas for Asymptotic Connectivity

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.235.147 ◽

2012 ◽

Vol 235 ◽

pp. 147-151 ◽

Cited By ~ 1

Author(s):

Rong Ding ◽

Ran Dong Xiao

Keyword(s):

Data Transmission ◽

Unit Area ◽

Network Connectivity ◽

Directional Pattern ◽

Directional Antennas ◽

Transmission Range ◽

Transmission Power ◽

Omnidirectional Antenna ◽

Viable Solution ◽

Pattern Versus

The connectivity of wireless networks is important for data transmission. Gupta and Kumar have already proved that if n nodes with omnidirectional antennas are located randomly, uniformly in a disk of unit area, the critical transmission range to achieve asymptotic connectivity is O( )[1]. In this work, we studied the network connectivity where nodes equipped with switched beamform antennas are randomly and uniformly distributed in a disc of unit area in R2, the antenna can be modeled in omnidirectional and directional patterns. We ﬁrst assume that nodes in the network cooperate in routing each others’ packets without considering the scheduling, there exists critical transmission range to achieve asymptotic connectivity of the overall network, which responding to critical transmission power. Directional antennas are considered to be a viable solution for improving the network’s connectivity, However, we ﬁnd that, without considering schedule, the smallest critical transmission range was obtained when omnidirectional antenna patterns were used in both the transmitter and receiver instead of directional antenna patterns in our model.

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Chained Data Acquisition and Transmission System Protype for Cabled Seafloor Earthquake Observatory

Journal of Marine Science and Engineering ◽

10.3390/jmse9080880 ◽

2021 ◽

Vol 9 (8) ◽

pp. 880

Author(s):

Jingyang Qiao ◽

Wu Liu ◽

Jingquan Liu ◽

Jianping Zhou

Keyword(s):

Data Transmission ◽

Seismic Data ◽

High Speed ◽

Clock Synchronization ◽

Theoretical Calculations ◽

Transmission System ◽

Data Sampling ◽

Crystal Oscillator ◽

Optical Cable ◽

Transmission Link

Seafloor observatories can provide long-term, real-time submarine monitoring data, which has great significance for the study of major scientific technology in marine science, especially in the seafloor earthquake observation. The chained submarine data sampling and transmission system is the prototype and foundation of cabled seafloor earthquake observatories. This paper designs and builds a chained data sampling and transmission system (SQSTS) based on Zynq-7000 Soc (System on chip) and clock synchronization. At the beginning, we realized high-precision submarine data (24 bit) sampling based on Zynq-7000 Soc and ADS 1256. Using the PPS (Pulse per second) signal provided by the P88 1588 PTP (Precise time protocol) clock synchronization board and the inner crystal oscillator of the Zynq-7000 Soc, the time stamp up to the microsecond level, for the seismic data sampled in each seismometer node can support subsequent inversion of seismic data. In addition, a high-speed data transmission link connecting nodes in SQSTS, which is based on the Gigabit transceiver and optical cable, has been investigated. The transmission link has been realized by using the Aurora IP core. The theoretical calculations indicate that the data transmission bus bandwidth can reach 4 Gbps, while in the meantime its reliability has been proved by experiments. The experimental results show that the system owns the characteristics of high data sampling accuracy, stable and reliable high-speed transmission, and has promising application prospects.

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