Packet-level erasure protection coding in aggregated packet transmissions
    8.
    发明授权
    Packet-level erasure protection coding in aggregated packet transmissions 有权
    聚合分组传输中的分组级擦除保护编码

    公开(公告)号:US08473821B2

    公开(公告)日:2013-06-25

    申请号:US13043259

    申请日:2011-03-08

    IPC分类号: H03M13/00

    摘要: In a first aspect, an aggregated packet (A-MPDU) includes packets (MPDUs) and EC-Blocks (Error Correction Blocks) containing error correction coding information. A transmitter uses a Fountain coding scheme (for example, Raptor or RaptorQ) to generate the error correction coding information from the MPDUs. If a receiver detects an error in a received MPDU, then the receiver uses the error correction coding information from the EC-Blocks to correct the error. In a second novel aspect, a determination is made as to whether a change in error rate is more likely due to collisions or to a low SNR. If the determination is that the change is due to collisions then the MCS index is adjusted to restore a target error rate, whereas if the determination is that the change is due to a low SNR then the number of EC-Blocks per A-MPDU is adjusted to restore the target error rate.

    摘要翻译: 在第一方面,聚合分组(A-MPDU)包括包含纠错编码信息的分组(MPDU)和EC-块(纠错块)。 发射机使用喷泉编码方案(例如,Raptor或RaptorQ)从MPDU生成纠错编码信息。 如果接收机检测到接收到的MPDU中的错误,则接收机使用来自EC-Block的纠错编码信息来校正错误。 在第二个新颖的方面,确定误差率的变化是否更可能是由于冲突或低SNR。 如果确定改变是由于冲突,则MCS索引被调整以恢复目标错误率,而如果确定改变是由于低SNR,则每个A-MPDU的EC块的数量是 调整以恢复目标错误率。