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arXiv 2201.04257cs.ITcs.NImath.IT
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包擦除链路的信息速率

The Information Velocity of Packet-Erasure Links

Elad Domanovitz, Tal Philosof, Anatoly Khina

摘要:

我们考虑的问题,顺序数据包传输的级联数据包擦除链路与确认(ACK)信号,由中继互连。我们治疗的情况下,首先传输一个单一的数据包,其中ACK是不必要的,在独立的同分布的擦除链接。对于这种情况下,我们推导出严格的上限和下限的概率到达失败内允许的端到端的通信延迟在给定数量的链接。当链接的数量是相称的允许的延迟,我们确定的最大比率之间的两个-创造的信息速度-到达失败的概率衰减到零,我们进一步推导出界限的到达失败的概率时,该比率是低于信息速度,确定指数到达失败的衰减率,并延长治疗与不同的擦除概率的链接。然后,我们提升所有这些结果的数据包流与独立的几何分布的到达间隔时间,并证明信息速度和指数衰减率保持不变的任何平稳遍历到达过程和确定性的到达间隔时间。我们证明了派生的基本限制的意义-信息速度和到达失败的指数衰减率-通过比较它们的模拟结果。

英文摘要:

We consider the problem of in-order packet transmission over a cascade of packet-erasure links with acknowledgment (ACK) signals, interconnected by relays. We treat first the case of transmitting a single packet, in which ACKs are unnecessary, over links with independent identically distributed erasures. For this case, we derive tight upper and lower bounds on the probability of arrive failure within an allowed end-to-end communication delay over a given number of links. When the number of links is commensurate with the allowed delay, we determine the maximal ratio between the two -- coined information velocity -- for which the arrive-failure probability decays to zero; we further derive bounds on the arrive-failure probability when the ratio is below the information velocity, determine the exponential arrive-failure decay rate, and extend the treatment to links with different erasure probabilities. We then elevate all these results for a stream of packets with independent geometrically distributed interarrival times, and prove that the information velocity and the exponential decay rate remain the same for any stationary ergodic arrival process and for deterministic interarrival times. We demonstrate the significance of the derived fundamental limits -- the information velocity and the arrive-failure exponential decay rate -- by comparing them to simulation results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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