Optimal sampling frequency allocation method and device of wireless sensor network

A wireless sensor and sampling frequency technology, which is applied in the field of optimal sampling frequency allocation in wireless sensor networks, and can solve problems such as reducing QoS, too many channels, and conflicts.

Inactive Publication Date: 2013-08-14
无锡赛睿科技有限公司
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Problems solved by technology

On the one hand, the higher the sampling frequency, the higher the QoS; on the other hand, if the sampling frequency is too high, it will cause too many channel conflicts during the transmission process, increase the packet loss rate and retransmission rate, resulting in high energy consumption, unexpected Latency and reduced QoS

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  • Optimal sampling frequency allocation method and device of wireless sensor network
  • Optimal sampling frequency allocation method and device of wireless sensor network
  • Optimal sampling frequency allocation method and device of wireless sensor network

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Embodiment Construction

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0049] Caccamo et al. proposed for the first time the cellular structure network (such as figure 1 shown), providing hardware support for real-time wireless sensor networks. There is a base station located in the center of each cell to provide routing and scheduling functions for itself, and its six sub-sites use non-overlapping single-hop to achieve wireless communication, so different neighbors can transmit data packets to the central base station at the same time. The internal node (inter-station) uses a global synchroniza...

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Abstract

The invention discloses an optimal sampling frequency allocation method and an optimal sampling frequency allocation device of a wireless sensor network. According to the method, in the iteration process, a source node issues the data task information e<j>(t+1); a node j receives the data task information e<j>(t+1) form the source node, and in addition, beta (t<+>) is calculated; the node j judges whether the constraint condition is broken through or not according to the e<j>(t+1) and the beta (t<+>); if the constraint condition is broken through, the updating is carried out, the self link information is sent from the node j to the source node, and if the constraint condition is not broken through, the updating is not carried out; and the source node issues the data task information to a forwarding node of a routing path according to the link information. Through the iteration process, the utility function can be continually increased, when the increase trend of the network utility function approaches to zero, the algorithm completes the convergence, and the optimal solution is obtained. Only when the constraint condition is broken through, the source node and a target node can generate updating data packets, the updating is carried out, and the communication cost can be obviously reduced, so the expenditure of the whole iteration process is far smaller than that of the classical optimization algorithm.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to a method and device for optimal sampling frequency allocation of wireless sensor networks. Background technique [0002] A typical wireless sensor network is composed of a large number of cheap sensor nodes, each sensor node includes a sensor module, a processor module, a wireless communication module and an energy supply module, which can be rapidly deployed in different environments, through the form of wireless self-organization Networking, sensing data and collecting data to the data processing center through multi-hop relay through wireless communication, so that people can obtain a large amount of detailed and reliable environmental information in real time without being limited by time and place. [0003] Nowadays, the development of wireless sensor network has aroused widespread concern all over the world. Compared with traditional network equipment, wir...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W84/18
Inventor 连朔赵季中刘云浩
Owner 无锡赛睿科技有限公司
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