Cognitive wireless sensor network routing method based on opportunistic forwarding
A sensor network and cognitive wireless technology, applied in the field of cognitive wireless sensor networks, can solve the problems of affecting the transmission quality of the primary user, increasing the transmission delay, and wasting resources.
Active Publication Date: 2020-10-27
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Problems solved by technology
[0005] Aiming at the problems of the routing protocol adopted by the traditional cognitive sensor network that affect the transmission quality of the primary user, waste resources and increase the transmission delay, the present invention proposes a routing protocol based on opportunistic forwarding for cognitive wireless sensor networks, which can ensure real-time, At the same time of reliable transmission, it also effectively protects the main user
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[0028] The present invention will be further described in detail below in conjunction with the examples.
[0029] The invention relates to the cognitive wireless sensor network technology, and is a routing protocol for the cognitive wireless sensor network. The cognitive nodes in the cognitive sensor network adopt a periodic sleep-wake mechanism. First, the spectrum sensing technology is used to judge the status of the primary user. If the primary user is not active, the data sending node uses the broadcast preamble to establish a communication link. According to the remaining energy and the average successful transmission time of each neighbor node, it is judged whether it meets the forwarding condition. The protocol is a cognitive wireless sensor network routing protocol based on opportunistic forwarding, so among the nodes that meet the forwarding conditions within the communication range of the data sending node, the node that wakes up first responds. In addition, since t...
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The invention relates to a cognitive wireless sensor network technology, in particular to a cognitive wireless sensor network routing method based on opportunistic forwarding. Cognitive nodes in the cognitive sensor network adopt a periodic dormancy-awakening mechanism; firstly, the state of a main user is judged through the spectrum sensing technology, if a main user is inactive, a data sending node builds a communication link in a lead code broadcasting mode, and whether the data sending node meets the forwarding condition or not is judged according to the residual energy of all neighbor nodes and the average successful transmission time. The protocol is a cognitive wireless sensor network routing protocol based on opportunistic forwarding, so that the node awakened at first responds inthe nodes meeting the forwarding condition within the communication range of the data sending node. Besides, due to the fact that regression or missed alarm of the main user may cause transmission conflict between the cognitive node and the main user, a retransmission mechanism based on confirmation is adopted to ensure the reliability of data packet transmission.
Description
technical field [0001] The invention relates to the cognitive wireless sensor network technology, in particular to a routing protocol for the cognitive wireless sensor network. Background technique [0002] Wireless sensor network is a wireless personal area network composed of a large number of low-capability sensor nodes in a self-organizing and multi-hop manner, and is widely used in medical, agricultural, industrial and national defense fields. With the rapid growth of wireless technology, there are more and more networks operating in the unlicensed industrial, scientific and medical frequency band (ISM 2.4GHz), which makes the ISM 2.4GHz frequency band very crowded. The resources of traditional wireless sensor networks are strictly limited, and they are extremely vulnerable to interference from coexisting networks, which leads to a significant decrease in transmission performance such as delay and reliability. [0003] Cognitive wireless sensor networks introduce cogni...
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Login to View More IPC IPC(8): H04W40/12H04L12/721H04B17/382
CPCH04W40/12H04B17/382H04L45/44
Inventor 郑萌王楚晴梁炜苑旭东夏晔张思超
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI