Abstract: In this paper, a novel differentiated service scheduling algorithm based on the transmission condition is introduced The proposed scheduling scheme, called weighted switch deficit round robin （WSDRR）, categorises the different frame types of compressed video which are handled in separate queues and prioritizes time sensitive and visually important data WSDRR also introduces an overdraft threshold that basically allows a packet to be scheduled even if its flow’s deficit is not large enough in a given scheduling round By numerical experiments, WSDRR achieves better delay and delay jitter performance than the DRR scheduling algorithm Hence the delay and jitter can further meet the requirement for real time VBR video transmission