摘要：A wireless sensor network (WSN) is becoming very popular technology. Wireless networking which is comprised on number of numerous sensors and they are interlinked or connected with each other for performing the same function collectively or cooperatively for the sake of checking and balancing the environmental factors. This type of networking is called as Wireless sensor networking. A wireless sensor network (WSN) consists of a group of self-organizing, lightweight sensor nodes that are used to cooperatively monitor physical or environmental conditions. Each sensor node in a WSN is equipped with a radio transmitter, several sensors, a battery unit and a microcontroller.Because of the size and cost constraints on sensor nodes, they are limited by energy, bandwidth, memory and other resources. Any protocol design for WSNs needs to consider the limitations of sensor nodes carefully. In UWSNs, turbulent conditions of the environments where the sensor nodes are deployed can cause the nodes to die. A contributing effort to explore the reliability issues in multimodal fusion sensor networks. We presented the system reliability for the case of two types of sensors and three types of sensors. WSNs hold the promise of many applications in the area of monitoring and control systems. Many properties of the environment can be observed by the monitoring system with the advent of cheap and tiny sensors. All these applications are meant for the specific purposes, and therefore maintaining data transport reliability is one of the major concern and the most important challenge. To address the reliability, we survey the various existing techniques; each of them has its own unique working to ensure the reliability. Some of the techniques use retransmission mechanism while others use redundant information for insuring the reliability.In the proposed process focus on the routing problem that affects the reliability of WSN. Hereby this problem can be overcome by implementing the Beacon vector routing protocol (BVR) in Hybrid Mechanism. By finding the alternative node in case of any node failure accrues. By this redundancy of information can be reduced and the loss of data can be avoided in Wireless Sensor Network
