Computer-implemented method performed by a central monitoring unit for adapting at least one pre-defined frame delay, wherein the corresponding at least one frame is communicated via at least one network switch of at least one computing unit in a frame-based computer network, wherein the at least one frame is received and forwarded by the at least one network switch, wherein the at least one network switch is extended with a monitoring or collecting capability, wherein the traffic of the at least one frame is monitored by the at least one network switch, the method comprises the steps: a. Monitoring and collecting input data from the at least one network switch of the at least one computing unit; wherein b. the input data comprises at least one information, wherein the at least one information is based on a correlation between the traffic of the at least one frame at input ports of the at least one network switch and changes in an occupancy of appropriate queues of the at least one frame at output ports of the at least one network switch, wherein the storage unit stores the at least one frame; c. deriving at least one current frame delay of the at least one frame from the at least one information; d. Determining the at least one adapted frame delay by adjusting or correcting the at least one pre-defined frame delay using the at least one current frame delay; and e. Correcting an estimation of an associated or an underlying resource reservation depending on the at least one information. the corresponding at least one frame is communicated via at least one network switch of at least one computing unit in a frame-based computer network, wherein the at least one frame is received and forwarded by the at least one network switch, wherein the at least one network switch is extended with a monitoring or collecting capability, wherein the traffic of the at least one frame is monitored by the at least one network switch, the method comprises the steps: a. Monitoring and collecting input data from the at least one network switch of the at least one computing unit; wherein b. the input data comprises at least one information, wherein the at least one information is based on a correlation between the traffic of the at least one frame at input ports of the at least one network switch and changes in an occupancy of appropriate queues of the at least one frame at output ports of the at least one network switch, wherein the storage unit stores the at least one frame; c. deriving at least one current frame delay of the at least one frame from the at least one information; d. Determining the at least one adapted frame delay by adjusting or correcting the at least one pre-defined frame delay using the at least one current frame delay; and e. Correcting an estimation of an associated or an underlying resource reservation depending on the at least one information. a. Monitoring and collecting input data from the at least one network switch of the at least one computing unit; wherein b. the input data comprises at least one information, wherein the at least one information is based on a correlation between the traffic of the at least one frame at input ports of the at least one network switch and changes in an occupancy of appropriate queues of the at least one frame at output ports of the at least one network switch, wherein the storage unit stores the at least one frame; c. deriving at least one current frame delay of the at least one frame from the at least one information; d. Determining the at least one adapted frame delay by adjusting or correcting the at least one pre-defined frame delay using the at least one current frame delay; and e. Correcting an estimation of an associated or an underlying resource reservation depending on the at least one information.