Effect of payload size on goodput when message segmentations occur for wireless networks: Case of packet corruptions recovered by stop-and-wait protocol
Effect of payload size on goodput when message segmentations occur for wireless networks: Case of packet corruptions recovered by stop-and-wait protocol
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发表时间：
2019-03
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通讯作者：
Takashi Ikegawa
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作者：
Takashi Ikegawa
研究了有效载荷大小对无线网络吞吐量的影响，在无线网络中，通过分段函数从消息中产生的分组由于误码而丢失，并通过停止和等待协议进行恢复。为了实现这一点，在给定消息大小分布和有效负载大小的情况下，我们使用分组大小分布的解析形式来推导吞吐量的精确解析形式。在以前的工作中，分组大小被假设为恒定的，即有效载荷大小加上报头大小，尽管实际分段的分组大小不是恒定的。因此，这种恒定的数据包大小假设可能不适用于产出量分析。数值结果表明，在低误码率下，恒定分组大小的假设是不合理的。此外，我们还指出，在高误码率下，有效载荷大小的产出量曲线是凹形的。此外，我们还表明，平均误码突发长度越大，吞吐量的凹形曲线越小。
This paper investigates the effect of payload size on goodput for wireless networks where packets created from a message through a segmentation function are lost due to bit errors and they are recovered by a stop-and-wait protocol. To achieve this, we derive the exact analytical form of goodput using the analytical form of a packet-size distribution, given a message-size distribution and a payload size. In previous work, the packet sizes are assumed to be constant, which are payload size plus header size, although actual segmented packets are not constant in size. Hence, this constant packet-size assumption may be not justified for goodput analysis. From numerical results, we show that the constant packet-size assumption is not justified under low bit-error rates. Furthermore, we indicate that the curves of goodput are concave in payload size under high bit-error rates. In addition, we show that the larger mean bit-error burst length yields less concave curves of goodput.