Ad-hoc network communication methods and ad-hoc network communication system

Abstract

The invention discloses ad-hoc network communication methods and an ad-hoc network communication system. The ad-hoc network communication system comprises a plurality of wireless nodes for networking,a communication base station and a cloud server. Single-hop information transmission is carried out among the wireless nodes. When the wireless nodes are located in a communication radius range R ofthe communication base station, the wireless nodes in the communication radius range R transmit information to the cloud server wirelessly through utilization of the base station, the information is returned through utilization of the cloud server, and the information is transmitted among the wireless nodes, so ad-hoc network communication is realized. Networking is carried out among the wirelessnodes through adoption of an improved destination sequenced distance vector routing (DSDV) protocol. The main improvement comprises the fact that a conventional destination sequenced distance vector routing (DSDV) protocol is combined with establishment of a multi-tree topology to carry out the networking, and the nodes exchange information with adjacent nodes through utilization of a routing information protocol (RIP). A method comprises the following steps of carrying out initialization; establishing routes among the nodes; and allocating priorities. A route with a higher transmission priority is preferentially selected for data transmission. The networking communication is realized.

Description

technical field [0001] The invention belongs to the technical field of communication, and specifically belongs to an ad hoc network communication method and an ad hoc network communication system. Background technique [0002] The wireless ad-hoc network is composed of nodes and is an autonomous, multi-hop network. The entire network has no fixed infrastructure and can be used when the existing network infrastructure (such as base stations, APs (Access Points)) cannot be used or is inconvenient. In the case of , it provides intercommunication between nodes. Due to the limited transmission power and wireless coverage of nodes, if two nodes that are far away from each other want to communicate, they must use other nodes to forward packets. In this way, a wireless multi-hop network is formed between the nodes. Mobile nodes in the network have routing and packet forwarding functions, and can form any network topology through wireless connections. A wireless ad hoc network can ...

AI Technical Summary

Problems solved by technology

There is such a problem in the prior art: the size of the sequence number is set here based on the priority made when the next hop is a single hop. For an ad hoc network, its distribution is a tree distribution. When the top node of the tree will When the information is transmitted to the leaf nodes, the distribution between each leaf node is scattered, so it is a complex multi-hop distribution. The size of the sequence number alone cannot be the first selection factor for priority transmission. It is possible that the sequence number is small but Its branches are longer, and the next hop is closer to the root node (that is, the node within the wireless communication range of the base station in the wireless ad hoc network), that is, there is a situation where the node has more priority for communication; the serial number broadcast by the node is monotonically increasing Even number, when node B finds that the route to node D (routing sequence number is s) is interrupted, node B broadcasts a routing information, notifying that the sequence number of the route becomes s+l, and sets the number of hops to infinity, so , the routing table of any node A that sends information through B includes an infinite distance, this process until A receives a valid route to D (the route sequence number is s+1-1)

DSDV requires the routing table to be updated frequently, which still consumes energy and network bandwidth when the network is idle

Once the network topology changes, a new serial number will be generated; therefore, standard DSDV cannot be applied to rapidly changing networks, so it is very important to provide an improved DSDV routing protocol for ad hoc networks

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