4 research outputs found
A Novel Energy-Driven Architecture for Wireless Sensor Networks
This paper proposes a novel Energy-Driven Architecture (EDA) as a durable architecture and considers almost all principal energy constituents of wireless sensor networks applications. By creating a single overall model, a tolerable formulation is then offered to communicate the total energy use of a wireless sensor network application regarding the energy constituents. The formulation provides a tangible illustration for analyzing the performance of a wireless sensor network application, optimizing its constituent's operations, as well as creating more energy saving applications. The simulations are employed to show the feasibility of our model and also energy formulation
A Novel Energy-Driven Architecture for Wireless Sensor Networks
This paper proposes a novel Energy-Driven Architecture (EDA) as a durable architecture and considers almost all principal energy constituents of wireless sensor networks applications. By creating a single overall model, a tolerable formulation is then offered to communicate the total energy use of a wireless sensor network application regarding the energy constituents. The formulation provides a tangible illustration for analyzing the performance of a wireless sensor network application, optimizing its constituent's operations, as well as creating more energy saving applications. The simulations are employed to show the feasibility of our model and also energy formulation
Π ΠΎΠ·Π²ΠΈΡΠΎΠΊ ΠΌΠ΅ΡΠΎΠ΄ΡΠ² Π΅Π½Π΅ΡΠ³ΠΎΠ·Π±Π΅ΡΠ΅ΠΆΠ΅Π½Π½Ρ Π² ΠΌΠΎΠ±ΡΠ»ΡΠ½ΠΈΡ ΡΠ΅Π½ΡΠΎΡΠ½ΠΈΡ ΠΌΠ΅ΡΠ΅ΠΆΠ°Ρ
ΠΠ»Ρ Π΄ΠΎΡΡΠ³Π½Π΅Π½Π½Ρ ΠΌΠ΅ΡΠΈ Π² Π΄Π°Π½ΡΠΉ ΡΠΎΠ±ΠΎΡΡ Π²ΠΈΡΡΡΡΡΡΡΡΡ Π½Π°ΡΡΡΠΏΠ½Ρ Π·Π°Π²Π΄Π°Π½Π½Ρ:
- Π°Π½Π°Π»ΡΠ· ΡΡΠ½ΡΡΡΠΈΡ
ΡΠΏΠΎΡΠΎΠ±ΡΠ² Π·Π°ΠΎΡΠ°Π΄ΠΆΠ΅Π½Π½Ρ Π΅Π»Π΅ΠΊΡΡΠΎΠ΅Π½Π΅ΡΠ³ΡΡ ΠΏΡΠΈ ΡΠΎΠ±ΠΎΡΡ Π΄Π°ΡΡΠΈΠΊΠ° ΠΠ‘Π;
- ΠΎΠΏΠΈΡ ΠΌΠ΅ΡΠΎΠ΄Ρ ΡΠΎΠ·ΠΏΠΎΠ΄ΡΠ»Π΅Π½ΠΎΠ³ΠΎ ΠΊΠΎΠ΄ΡΠ²Π°Π½Π½Ρ Π΄ΠΆΠ΅ΡΠ΅Π»Π°;
- ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ½Π΅ ΠΌΠΎΠ΄ΡΠ»ΡΠ²Π°Π½Π½Ρ ΠΌΠΎΠ΄ΠΈΡΡΠΊΠΎΠ²Π°Π½ΠΎΡ ΡΡ
Π΅ΠΌΠΈ ΡΠΎΠ±ΠΎΡΠΈ Π΄Π°ΡΡΠΈΠΊΠ°;
- Π°Π½Π°Π»ΡΠ· ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡΠ² ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΡΠ²Π°Π½Π½Ρ ΡΠ° ΠΏΠΎΡΡΠ²Π½ΡΠ½Π½Ρ Π΅Π½Π΅ΡΠ³ΠΎΠ΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ Π· ΡΠ½ΡΠΈΠΌΠΈ ΡΡ
Π΅ΠΌΠ°ΠΌΠΈ ΡΠΎΠ±ΠΎΡΠΈ Π΄Π°ΡΡΠΈΠΊΠ°.To achieve the goal, the following tasks are solved in this work:
- analysis of existing ways of saving electricity during the operation of the BSM sensor;
- description of the method of distributed coding of the source;
- mathematical modulation of the modified sensor operation scheme;
- analysis of the results of mathematical modeling and comparison of energy efficiency with other schemes of sensor operation
Power Optimisation and Relay Selection in Cooperative Wireless Communication Networks
Cooperative communications have emerged as a significant concept to improve reliability and throughput in wireless systems. In cooperative networks, the idea is to implement a scheme in wireless systems where the nodes can harmonize their resources thereby enhancing the network performance in different aspects such as latency, BER and throughput. As cooperation spans from the basic idea of transmit diversity achieved via MIMO techniques and the relay channel, it aims to reap somewhat multiple benefits of combating fading/burst errors, increasing throughput and reducing energy use. Another major benefit of cooperation in wireless networks is that since the concept only requires neighbouring nodes to act as virtual relay antennas, the concept evades the negative impacts of deployment costs of multiple physical antennas for network operators especially in areas where they are difficult to deploy. In cooperative communications energy efficiency and long network lifetimes are very important design issues, the focus in this work is on ad hoc and sensor network varieties where the nodes integrate sensing, processing and communication such that their cooperation capabilities are subject to power optimisation. As cooperation communications leads to trade-offs in Quality of Services and transmit power, the key design issue is power optimisation to dynamically combat channel fluctuations and achieve a net reduction of transmit power with the goal of saving battery life. Recent researches in cooperative communications focus on power optimisation achieved via power control at the PHY layer, and/or scheduling mechanism at the MAC layer. The approach for this work will be to review the power control strategy at the PHY layer, identify their associated trade-offs, and use this as a basis to propose a power control strategy that offers adaptability to channel conditions, the road to novelty in this work is a channel adaptable power control algorithm that jointly optimise power allocation, modulation strategy and relay selection.
Thus, a novel relay selection method is developed and implemented to improve the performance of cooperative wireless networks in terms of energy consumption. The relay selection method revolves on selection the node with minimum distance to the source and destination. The design is valid to any wireless network setting especially Ad-hoc and sensor networks where space limitations preclude the implementation of bigger capacity battery. The thesis first investigates the design of relay selection schemes in cooperative networks and the associated protocols. Besides, modulation strategy and error correction code impact on energy consumption are investigated and the optimal solution is proposed and jointly implemented with the relay selection method. The proposed algorithm is extended to cooperative networks in which multiple nodes participate in cooperation in fixed and variable rate system. Thus, multi relay selection algorithm is proposed to improve virtual MIMO performance in terms of energy consumption. Furthermore, motivated by the trend of cell size optimisation in wireless networks, the proposed relay selection method is extended to clustered wireless networks, and jointly implemented with virtual clustering technique.
The work will encompass three main stages: First, the cooperative system is designed and two major protocols Decode and Forward (DF) and amplify and forward (AF) are investigated. Second, the proposed algorithm is modelled and tested under different channel conditions with emphasis on its performance using different modulation strategies for different cooperative wireless networks. Finally, the performance of the proposed algorithm is illustrated and verified via computer simulations. Simulation results show that the distance based relay selection algorithm exhibits an improved performance in terms of energy consumption compared to the conventional cooperative schemes under different cooperative communication scenarios