802.11n/ac/ad中的两级聚合重传算法设计

doi:10.3969/j.issn.1001-2400.2018.02.016

Abstract

Abstract:

The IEEE802.11n/ac/ad support multiple aggregation schemes, which can improve the efficiency of the MAC layer by aggregating MAC protocol data units and thus reducing the overhead of the MAC and PHY layer. However, in error-prone environments, the aggregation level of retransmitted aggregation frames severely fluctuates, incurring the instability of system throughput. In this paper, we propose a novel two-level retransmission aggregation scheme in erroneous environments. This scheme first introduces the aggregation sliding window in the MAC layer to increase the aggregation level; second, through theoretical analysis, the second level aggregation level and the first level A-MSDU frame length are optimized and adjusted dynamically according to the subframe size, the maximum aggregation level (MAL) allowed by the current two-level frame aggregation and the real-time channel bit-error-rate (BER). Simulation by using NS-3 shows that this scheme outperforms other schemes for different subframe sizes and aggregation levels.

Key words: 802.11n/ac/ad, two-Level aggregation, BER, NS-3, subframe size, aggregation level

QIAN Xu;WU Bin;YE Tianchun. Two-level frame aggregation retransmission scheme design in 802.11n/ac/ad[J].Journal of Xidian University, 2018, 45(2): 90-96.

References

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Two-level frame aggregation retransmission scheme design in 802.11n/ac/ad

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