We heard you did a great job at nak - dong river 听说你在洛东江作战非常出色
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You want to give up nak - dong river 你想要放弃洛东江
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Ack nak transmission 认可字符不认可字符传输
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This thesis discusses detailedly the flow process of ip multicast , error discovery method and error recovery method , and also proposes a new error control method to implement reliable multicast in computer supported cooperative design system : serial integrates with timer are used to discover error , arq mechanism based on nak feedback is modified to correct error , " sliding window " mechanism is imported to make up the drawbacks of traditional nak , and " slotting and damping " technique is used to resolve the question of " feedback implosion " which results from multicast reliability control 详细研究了ip多播传输的流程、数据传输的差错检测方法及差错恢复方法，提出在协同设计系统中实现可靠多播的控制方法：利用序列号和计时器相结合的方法进行传输数据的差错检测，改进了基于nak反馈信息的arq重传机制来实现差错恢复，并引入了滑动窗口机制来解决传统nak方法的不足，采用“时间分槽?抑制”技术来解决由于进行多播可靠控制而产生的“反馈内陷”问题。
