The scheme on network control, clustering and routing is the key technology in wireless network.

An intelligent QoS unicast routing algorithm for NGI;

In order to solve the problem that QoS route meets while studying at present, this paper utilizes the characteristic of ant colony algorithm that can look for the shortest-path, and proposes an algorithm of QoS unicast routing, based on ant colony systematic principles, and used for solving bandwidth and delay.

In allusion to the flaws of ant colony algorithm,a multi-behaved ant colony algorithm in combination with QPSO was presented for solving the QoS unicast routing problem.

The analysis shows that under multi-path routing,the throughput from source node to destination node has little to do with their distance;under single-path routing,the throughputs from source node to destination node decrease quickly with the increase of their hops of path length.