Bandwidth allocation method for scalable video streaming in multi-overlay network based on auction

The invention relates to a bandwidth allocation method for scalable video streaming in a multi-overlay network based on auction. The invention realizes the optimization of the multi-coverage network band width allocation by the method comprising the following steps: 1, the band width allocation optimization problems of the multi-coverage network is converted into band width allocation optimization problems of a series of monolayer overlay networks, thereby reducing the computational complexity and is convenient to realize by utilizing a distributed arithmetic; 2, double auction among nodes isadopted, namely on one hand the node sales own uplink bandwidth to the other nodes, on the other hand purchases bandwidth from other nodes, thereby solving the problem of bandwidth collision of the nodes in the multi-overlay network; and 3, a self-adapting layer joining/exiting algorithm is provided so as to ensure that the node can carry out the bandwidth sale and auction and select the number of the overlay network laye