Improving energy saving and reliability in wireless
- 1. Improving Energy Saving and Reliability in Wireless Sensor Networks Using a Simple CRT-Based Packet-Forwarding Solution Abstract— This paper deals with a novel forwarding scheme for wireless sensor networks aimed at combining low computational complexity and high performance in terms of energy efficiency and reliability. The proposed approach relies on a packet- splitting algorithm based on the Chinese Remainder Theorem (CRT) and is characterized by a simple modular division between integers. An analytical model for estimating the energy efficiency of the scheme is presented, and several practical issues such as the effect of unreliable channels, topology changes, and MAC overhead are discussed. The results obtained show that the proposed algorithm outperforms traditional approaches in terms of power saving, simplicity, and fair distribution of energy consumption among all nodes in the network. Existing system: With regards to energy saving, two main approaches can be found in the literature: duty cycling and in-network aggregation; respectively. The first approach consists in putting the radio transceiver on sleep mode (also known as power-saving mode) whenever communication is not needed. The second approach is intended to merge routing and data aggregation techniques and is primarily aimed at reducing the number of transmissions.
- 2. Demerits: Although the first method is the most effective way to reduce energy consumption, a sleep/wakeup scheduling algorithm is required (which implies solving critical synchronization issues), and energy saving is obtained at the expense of an increased node complexity and network latency. The second method takes into care the attacks in a WSN. Proposed system: With the aim of reducing energy consumption while taking the algorithmic complexity into account, we propose a novel approach that splits the original messages into several packets such that each node in the network will forward only small sub packets. The splitting procedure is achieved applying the Chinese Remainder Theorem (CRT) algorithm, which is characterized by a simple modular division between integers. The sink node, once all sub packets (called CRT components) are received correctly, will recombine them, thus reconstructing the original message. The splitting procedure is especially helpful for those forwarding nodes that are more solicited than others due to their position inside the network. Regarding the complexity, in the proposed approach, almost all nodes operate as in a classical forwarding algorithm and, with the exception of the sink, a few low-complex arithmetic operations are needed. If we consider that the sink node is computationally and energetically more equipped than the other sensor nodes, the overall complexity remains low and suitable for a WSN. Moreover, the proposed technique does not require the use of disjoint paths.