Patent ID: 7406078

Claim:
A method for providing QoS in a wireless network communicating through a point-to-point network, the method comprising: (a) at least one of intermediate nodes and a receiving node, selecting at least one QoS management node among different nodes within a predetermined range which are not included on a forwarding route, the forwarding route reaching from a transmitting node to the receiving node via at least one intermediate node satisfying QoS requirements; (b) the selected QoS management node, managing QoS management information of the different nodes which are not included on the forwarding route; and (c) the QoS management node, changing the forwarding route on the basis of the QoS management information so that the changed forwarding route passes through a different node satisfying the QoS requirements, if it is expected that at least one intermediate node existing on the forwarding route will not satisfy the QoS requirements, wherein (c) comprises: (c1) the at least one intermediate node existing on the forwarding route, requesting a route change to the QoS management node if its own QoS information exceeds a predetermined threshold value; (c2) the QoS management node receiving the route change request, selecting a node among the different nodes which are not included on the forwarding route, which optimally satisfy QoS requirements, on the basis of the QoS management information; and (c3) the QoS management node, changing the forwarding route so that the changed forgwarding route passes through the selected node.