Abstract: IEEE802.17 standard proposes that the stations transmit data according to service class.This would lead to HOL，reducing the RPR’s bandwidth utilization and increasing the packets’loss rate.To reduce these deficiencies，this paper presents a new data transmitting scheme.It uses virtual output queuing based on TTL as the buffered queue of being sent data.The satisfied virtual output queuing should be ascertained by some method based on data stream.Finally，those satisfied queuing with dynamic weighted round-robin algorithm is dispatched.The simulation results show that the new scheme has been effective in overcoming the HOL and ensuring the fairness of every data stream.So it plays a significant role in spatial multiplexing of RPR.

Key words: resilient packet ring, virtual output queuing, dynamic weighted round-robin algorithm, spatial multiplexing

摘要： 针对IEEE802.17标准建议的数据发送方案在发送数据时，会出现头阻塞，降低RPR的带宽利用率的不足，设计了一种新的数据发送方案，采用基于TTL的虚拟输出队列作为待发送数据的缓冲队列，用基于数据流的数据发送方法来确定满足发送要求的虚拟输出队列，对满足要求的队列用基于帧的动态加权轮询调度算法进行调度。仿真结果表明，新方案有效地克服了头阻塞问题，保证了各个数据流的公平性，能极大地发挥弹性分组环的空间复用功能。

关键词: 弹性分组环, 虚拟输出队列, 动态加权轮询算法, 空间复用