drcl.intserv.scheduler
Class admission_PTSP

java.lang.Object
  drcl.DrclObj
      drcl.intserv.Admission
          drcl.intserv.scheduler.admission_PTSP

All Implemented Interfaces:

java.lang.Cloneable, ObjectCloneable, ObjectDuplicable, java.io.Serializable

public class admission_PTSP

extends Admission

Works with TrafficModel that implements TrafficPeriodic, SpecR_PTSP and traffic shaper for traffic_Periodic. The admission test is conducted by calculating the minimum worst-case traversal time (non-preemptive version).

See Also:

SpecR_PTSP, TrafficModel, TrafficPeriodic, traffic_Periodic, Serialized Form

Constructor Summary

admission_PTSP()

Method Summary

SpecAd	advertisement(SpecAd adspec_) Returns a new Adspec that summarizes the QoS of the path from the sender up to the current hop.
double	MWTT(int handle_, SpecR_PTSP rspec_)
SpecFlow	removeFlowspec(int handle_) Removes an installed flowspec by its handle.
void	reset() Resets to the initial state.
SpecFlow	setFlowspec(int handle_, long[] tos_, long[] tosmask_, SpecFlow fspec_) Installs a new flowspec or changes an existing flowspec with the specified handle.

Methods inherited from class drcl.intserv.Admission

addFlowspec, addFlowspec, addFlowspec, duplicate, getScheduler, info, removeAllFlowspecs

Methods inherited from class drcl.DrclObj

clone, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

admission_PTSP

public admission_PTSP()

Method Detail

reset

public void reset()

Description copied from class: Admission

Resets to the initial state.

Overrides:

reset in class Admission

setFlowspec

public SpecFlow setFlowspec(int handle_,
                            long[] tos_,
                            long[] tosmask_,
                            SpecFlow fspec_)

Description copied from class: Admission

Installs a new flowspec or changes an existing flowspec with the specified handle. This method checks if the available resources (buffer and bandwidth) are sufficient for the flow. It returns null if the flow passes; returns a suggested flowspec if failed. Also, the "handle" field in fspec_ is set to either a valid value (success) or a negative value (failure). A subclass may need to override this method to create its own data structure for the successfully installed flow.

Overrides:

setFlowspec in class Admission

Parameters:

handle_ - the handle assigned to this flow, -1 if installing a new flow.

tos_ - ID's of flows that share the flowspec.

tosmask_ - masks of flow ID's.

fspec_ - the flowspec.

Returns:

null if the installation succeeds or a suggested flowspec if failed.

removeFlowspec

public SpecFlow removeFlowspec(int handle_)

Description copied from class: Admission

Removes an installed flowspec by its handle. This method releases the resources (buffer and bandwidth) reserved for the flow. A subclass may need to override this method to further release any data structure allocated for the flow.

Overrides:

removeFlowspec in class Admission

Returns:

the removed flowspec.

advertisement

public SpecAd advertisement(SpecAd adspec_)

Description copied from class: Admission

Returns a new Adspec that summarizes the QoS of the path from the sender up to the current hop. Specifically, this method updates hop, packet loss rate, MTU, propagation delay and bandwidth. Subclasses should override this method to update end-to-end delay and jitter.

Overrides:

advertisement in class Admission

MWTT

public double MWTT(int handle_,
                   SpecR_PTSP rspec_)