Performance Analysis of Packet Aggregation in WLANs with Simultaneous Multi-user Access

Performance Analysis of Packet Aggregation in WLANs with Simultaneous Multi-user Access
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多用户同时接入 WLAN 中数据包聚合的性能分析

DOI:
10.1007/978-3-642-01399-7_20
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
C. Görg
C. Görg
中科院分区:
--
文献类型:
--
作者:
Md. Shahidul Islam;A. Könsgen;A. Timm-Giel;C. Görg

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考虑跨层无线LAN系统,其使用OFDMA或SDMA传输同时为多个用户发送分组。由于每个用户的分组长度和物理比特率不同,这导致不同的传输时间,使得具有较快传输的用户必须等待,直到较慢用户的传输完成。数据包聚合技术可以在不影响时延的情况下减少传输时间的损失,提高吞吐量。在本文中,吞吐量的确定分析和模拟有和没有数据包聚集的一些给定的分布函数的数据包大小和传输时间。对于一个更现实的信道模型,由于分组聚合的吞吐量增强是由模拟确定的。结果表明,根据不同流的分布,可以实现显着的吞吐量提高。
A cross-layer wireless LAN system is considered which transmits packets for a number of users simultaneously using OFDMA or SDMA transmission. Due to varying packet lengths and physical bitrates for each user, this results in different transmission times so that users with faster transmissions have to wait until the transmission of the slower users is complete. Packet aggregation can reduce the loss of airtime and enhance the throughput without affecting the delay by filling in the gaps with additional packets which are ready for transmission. In this paper, the throughput is determined analytically and by simulation with and without packet aggregation for some given distribution functions of the packet size and the transmission time. For a more realistic channel model, the throughput enhancement due to packet aggregation is determined by simulations. It is shown that dependent on the distribution of the different flows, a significant throughput enhancement can be achieved.
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DOI: --
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