A wireless mesh network routing method for mine emergency rescue based on cross-layer link state feedback

Abstract

The invention discloses a mine emergency rescue wireless mesh network routing method based on cross-layer link state feedback. The method comprises the steps as follows: a backbone route node selects link information with the highest transmission success rate for maintaining and updating a route list according to backbone link state information between an MAC (media access control) layer and other backbone route nodes. Further, each wireless Mesh terminal maintains an adjacent backbone route node list and records backbone route nodes in a communication range of the terminal; and when information is required to be uploaded to a gateway, if no effective routing information is found, an adjacent backbone route node list is first inquired, and a backbone route node has a best transmission state with the gateway is taken as a next node communicated with the gateway.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a mine emergency rescue wireless mesh network routing method based on cross-layer link state feedback. Background technique [0002] Wireless mesh network, also known as wireless Mesh network, is a wireless multi-hop relay network capable of self-organizing and self-configuring. It has the characteristics of portability, flexibility, and strong environmental adaptability. popular technology. At present, the wireless Mesh network based on the hybrid mesh network structure is the most widely used in mine emergency rescue communications. Under this structure, wireless terminal devices such as voice phones, sensor nodes, and cameras have wireless Mesh routing functions and can participate in wireless Mesh network networking, thereby enhancing the robustness of mine emergency rescue network information transmission. However, the increase of the wireless Mesh routing function also m...

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Problems solved by technology

However, when the first data packet is sent to an unknown destination node or the current path fails, the routing protocol based on the route request (Route Request, RREQ) / route reply (Route Reply, RREP) mechanism needs to broadcast the route request message. For routing discovery, the entire discovery process takes time and will generate a certain response delay, and the delay will increase with the expansion of the network relay scale

Therefore, when this type of protocol is applied to the mine emergency rescue wireless Mesh network, it will seriously affect the real-time performance of delay-sensitive services such as voice and sensor data.

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