Besides , the system can simultaneously monitor the real - time transmission condition of the audio and video packets , such as the loss and delay condition during the transmission in the lan , and apply some elementary solutions to it . so it is of a great applicative value
2.
Firstly , we study problems where job preemption is allowed under the generalized delay condition , i . e . delay is caused by both setup time and time of some fraction of work must be repeated if preemption occurs . we generalize the notion of job preemption by using two kinds of preempt - setup - repeat models representing these conditions