Method, system and node for transmitting data in distributed non-collaboration grid network

The invention discloses a data transmission method, system and node in distributed un-cooperated gridding network. The method includes: A. the first node sends bandwidth requirement to obtain data sending right; B. assuring the using condition of the current network resource based on the failure times of the sent bandwidth requirement and the result of threshold comparison, and assuring the bandwidth used this time data transmission based on said using condition of the network resource, wherein the busier the using of the network resource, the less the distributed bandwidth used for the present time data transmission; C. the first node sends data to the second node based on said bandwidth. The invention judges the using condition of current network resource after applying data transmission right, setting bandwidth used when node sends data flexibly to use resource reasonably, it can avoid some nodes occupy channel that other nodes can not obtain bandwidth in time to increase delay, the equitableness of node is increased.