Wireless sensor network routing method based on software defined network

A software-defined network and wireless sensor technology, which is applied in wireless communication, electrical components, transmission systems, etc., can solve the problem of inability to effectively obtain the remaining energy of nodes in the entire network, the transmission power of the sensing range, the inability of real-time and effective transmission of network resources, and the wireless sensor Problems such as frequent network topology changes, to achieve the effects of easy expansion, energy balance, and reduced overhead

CN105530679AInactive Publication Date: 2016-04-27SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-04-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a wireless sensor network routing method based on a software defined network. In the case of emergent service of a monitoring area, a monitoring center executes a routing adjustment process, and the method comprises the following steps: selecting an access node according to the dump energy of SDSN nodes, executing minimum hop routing discovery, calculating optimal access node transmitting power and link service flow rate matrixes according to a data service condition and a power upper limit of the access node in the network, generating a mirror image file according to the calculation result and transmitting the mirror image file to the SDSN nodes, receiving the mirror image file distributed by the monitoring center by the SDSN nodes, and reprogramming and adjusting the transmitting power and routing. The entire routing protocol can be verified on a platform which is established based on CC2530 and PC. The method is used for effectively decoupling a control plane and a data forwarding plane in the network, compensating the defects of poor astringency and adjustment delay of the traditional sensor network distributed algorithm and ensuring the stability and the robustness of the network.
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Description

technical field

[0001] The invention relates to a routing protocol for joint power control in an SDN-based heterogeneous wireless sensor network, and belongs to the field of routing protocols in wireless sensor networks. Background technique

[0002] Wireless sensor network is an intelligent network information system that integrates information perception collection, fusion transmission and information processing functions. More than ten years of development has made the key technologies in wireless sensor networks such as routing and transmission protocols, topology control and data fusion mature, but at the same time it has also encountered bottlenecks: 1) Traditional WSNs are designed for specific applications, and hardware standards are different. Unified and difficult to reuse; 2), due to resource constraints such as node energy and computing power, WSN lacks elastic change capabilities, and node functions need to be manually updated to change configuration; 3), the di...

Examples

Embodiment Construction

[0027] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0028] Such as figure 1 As shown, the wireless sensor network routing method based on the software-defined network of the present invention adds SDSN nodes and a centralized management and control center in the wireless sensor network. A collection of common nodes in the network where n 1 Indicates the number of common nodes; SDSN node set where n 2 Indicates the number of SDSN nodes. The collection of all nodes and control centers is The system works on a sequence of discrete time slots. The time slot t represents the time interval [t, t+1), and each time slot is a unit length. The management and control center first detects whether there is a sudden business in the network. When there is a sudden business, the management and control center needs to readjust the routing in the network and upload the business data in the system as much as possible, s...