| 摘要: |
| 混合自动重传请求（Hybrid Automatic Repeat Request，HARQ）是一种利用前向纠错和自动重传请求（Automatic Repeat Request，ARQ）方案来对抗数据包丢失和损坏从而提高无线通信可靠性的有效技术。然而，ARQ方案会增加数据包的传输次数，从而导致吞吐量的损失特别是在低信噪比区域。针对此问题，提出了一种部分合并重传HARQ（Partial Combining Retransmission HARQ，PCR-HARQ）方案。当接收端恢复失败时，与重复冗余HARQ方案在发送端重传整个错误数据包相比，该方案在发送端将错误数据包与新数据包合并起来进行传输，使得接收端在恢复原始错误数据包的同时也可恢复新数据包，从而提高了吞吐量。此外，推导了PCR-HARQ方案的吞吐量表达式，并分析了该方案的复杂度。仿真结果表明，在信噪比为0 dB时，PCR-HARQ方案吞吐量最大可提升至0240 9，平均传输次数由4次减少至1.99次。 |
| 关键词: 混合自动重传请求（HARQ） 前向纠错 高吞吐量 低复杂度 |
| DOI：10.20079/j.issn.1001-893x.241112001 |
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| 基金项目:国家自然科学基金资助项目（62471385， 62271386）；陕西省自然科学基金项目（2024JC-YBQN-0692） |
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| High Throughput Hybrid ARQ Scheme Based onPartial Combining Retransmission |
| LIU Yang,JIANG Hongxiao,WANG Bin,ZHANG Yuzhi |
| (1.School of Telecommunication and Information Engineering，Xi’an University of Science and Technology，Xi’an 710054，China;2.Xi’an Key Laboratory of Network Convergence Communication，Xi’an 710054，China) |
| Abstract: |
| Hybrid automatic repeat request(HARQ) is an effective technique that utilizes forward error correction and automatic repeat request(ARQ) to combat packet loss and corruption to enhance the reliability of wireless communication.However，ARQ will increase the number of the transmissions of data packets and thereby resulting in the throughput loss especially at low signal-to-noise ratio(SNR) region.To address this issue，the authors propose a cross-packet HARQ scheme named Partial Combining Retransmission HARQ(PCR-HARQ) scheme.When the receiver fails to recover，compared with the repetition redundancy HARQ scheme which retransmits the entire erroneous packet at the transmitter，the proposed scheme combines the erroneous packet with the new packet at the transmitter for transmission，so that the receiver can recover the new packet while recovering the original erroneous packet，thereby improving the throughput.Besides，the throughput expression is derived and the complexity for the proposed PCR-HARQ scheme is analyzed.Simulation results show that the proposed PCR-HARQ scheme improves the throughput maximally to 0.240 9 and decreases the average number of transmissions from 4 times to 1.99 times when the SNR is 0 dB. |
| Key words: hybrid automation repeat request（HARQ） forward error correction high throughput low complexity |
《电讯技术》编辑部 