LTE TDD系统中下行HARQ机制的研究

doi:10.3969/j.issn.1000-0801.2013.04.015

Abstract

Abstract:

Based on a detailed research on the mechanism of downlink data transmission in LTE system，an errorfree HARQ solution to realize the downlink data transmission process was provided.According to the relations of the feedback delay，associated decision of feedback judgment and retransmission priority were adopted to complete the correspondence between them.A research on RTT of synchronous and asynchronous HARQ and the influence of different UL-DL configurations on HARQ RTT were also studied.Then a method to minimize RTT was put forward to provide reference for eNode B to choice configurations when providing different communication services.

Key words: LTE, round trip time, UL-DL configuration, HARQ

Fatang Chen,Cui Wan,Xi Fan. Research of Downlink HARQ Mechanism in LTE TDD System[J]. Telecommunications Science, 2013, 29(4): 74-77.

配置	上下行子帧比	进程数						子帧n
配置	上下行子帧比	上行	下行	0	1	2	3	4	5	6	7	8	9
0	3：2	7	4	-	-	6	-	4	-	-	6	-	4
1	2：3	4	7	-	-	7，6	4	-	-	-	7，6	4	-
2	1：4	2	10	-	-	8，7，6，4	-	-	-	-	8，7，6，4	-	-
3	3：7	3	9	-	-	11，7，6	6，5	5，4	-	-	-	-	-
4	2：8	2	12	-	-	12，11，8，7	7，6，5，4	-	-	-	-	-	-
5	1：9	1	15	-	-	13，12，11，9，8，7，6，5，4	-	-	-	-	-	-	-
6	5：5	6	6	-	-	7	7	5	-	-	7	7	-

上下行子帧配置				子帧n的 k＇值（ms）
上下行子帧配置	0	1	2	3	4	5	6	7	8	9
0	6	4	-	-	-	6	4	-	-	-
1	7	4	-	-	7	7	4	-	-	7
2	8	4	-	6	7	8	4	-	6	7
3	7	7	-	-	-	11	4	5	6	6
4	7	8	-	-	11	12	4	5	6	7
5	8	9	-	11	12	13	4	5	6	7
6	6	4	-	-	-	7	4	-	-	6

1	3GPP TS 36.211 V9.0.1.Evolved Universal Terrestrial Radio Access（E-UTRA）；Physical Channels and Modulations， 2009
2	Dalhlman E ， Parkvall S ， Skold J ， et al. 3G Evolution：HSPA and LTE for Mobile Broadband，2nd ed. Academic Press， 2008
3	3GPP TS 36.321 V9.1.0.Evolved Universal Terrestrial Radio Access （E-UTRA）Medium Access Control （MAC）Protocol Specification， 2009
4	3GPP TS 36.213 V9.0.1.Evolved Universal Terrestrial Radio Access（E-UTRA）；Physical Layer Procedures， 2009
5	Susitaival R ， Meyer M . LTE coverage improvement by TTI bundling. Proceedings of VTC 2009-Spring， Spain， 2009

[1]	Hao XU, Lin WU. Research on VoWi-Fi interoperability based on 5G network [J]. Telecommunications Science, 2023, 39(5): 144-154.
[2]	Bin ZHUGE, Zhenghu YIN, Wenxue SI, Lei YAN, Ligang DONG, Xian JIANG. Student knowledge tracking based multi-indicator exercise recommendation algorithm [J]. Telecommunications Science, 2022, 38(9): 129-143.
[3]	Fengxun GONG, Jiankun LI. Characteristics of simplified frequency-domain Volterra series based S-mode receiver [J]. Telecommunications Science, 2022, 38(6): 100-110.
[4]	Hanyang LI, Weiwen WENG, Nan LI, Long ZHANG, Jinxia CHENG. Research of 5G NR RedCap technology [J]. Telecommunications Science, 2022, 38(3): 93-101.
[5]	Bei LI, Yuhua HU, Guanghai LIU, Tian XIAO, Chuntao SONG, Yi ZHANG, Bo WANG, Qunqing WANG. Research on co-spectrum sharing technology in LTE 2.1 GHz [J]. Telecommunications Science, 2022, 38(12): 112-120.
[6]	Shanzhi CHEN, Yuming GE, Yan SHI. Technology development, application and prospect of cellular vehicle-to-everything (C-V2X) [J]. Telecommunications Science, 2022, 38(1): 1-12.
[7]	Xiaorong XU, Weiwei ZHU, Jianrong BAO, Weiping ZHU, Wei FENG, Yingbiao YAO. Energy-efficiency priority based beamforming design and optimization in IRS-assisted SWIPT system [J]. Telecommunications Science, 2022, 38(1): 36-46.
[8]	Guangyu LI, Yanping LIANG, Li YU, Kun WANG, Yangming CHEN, Sijia LIU. AI based scheme on voice service quality evaluation and assurance [J]. Telecommunications Science, 2021, 37(5): 64-71.
[9]	Bingjiang CAI. LTE resource-aware dynamic adaptive wireless multimedia streaming system [J]. Telecommunications Science, 2021, 37(1): 147-158.
[10]	Lu CHENG,Lihua YANG,Zenghao WANG,Jie ZHANG,Yan LIANG. Historical information based iterative soft Kalman time-varying channel estimation method [J]. Telecommunications Science, 2020, 36(9): 23-31.
[11]	Haiyan CAO,Wenjuan HU,Yingjuan ZHI,Fangmin XU,Xin FANG. Energy efficiency joint optimization algorithm for low-precision ADC massive MIMO systems [J]. Telecommunications Science, 2020, 36(6): 90-96.
[12]	Feng LIN,Liujing XU,Xiaohua CHEN,Weiqiang QI,Ke CHEN,Tiantian ZHU. Method of Webshell detection based on multi-view feature fusion [J]. Telecommunications Science, 2020, 36(6): 125-132.
[13]	Wei LIU,Yipeng ZHANG,Xuying GUAN,Shangchao KUANG,Feng LI. C-V2X city-scale demonstration application [J]. Telecommunications Science, 2020, 36(4): 27-35.
[14]	Ke ZHANG,YueJia SUN,Hai HAN. Customer credit modeling and credit granting method based on hybrid algorithm of collaborative filtering and social network [J]. Telecommunications Science, 2020, 36(2): 52-60.
[15]	Dan LI,Lancheng QIN,Jianping WU,Yingying SU,Mingwei XU,Xingang SHI,Yunan GU,Tao LIN. Internet source address verification method based on synchronization and dynamic filtering in address domain [J]. Telecommunications Science, 2020, 36(10): 21-28.

Research of Downlink HARQ Mechanism in LTE TDD System

RichHTML

PDF下载

Knowledge

Cited

Abstract

Cite this article

share this article

Figures/Tables 8

References 5

Related Articles 15

Metrics

Recommended 0

上下行子帧配置					子帧号
上下行子帧配置	0	1	2	3	4	5	6	7	8	9
0	D	S	U	U	U	D	S	U	U	U
1	D	S	U	U	D	D	S	U	U	D
2	D	S	U	D	D	D	S	U	D	D
3	D	S	U	U	U	D	D	D	D	D
4	D	S	U	U	D	D	D	D	D	D
5	D	S	U	D	D	D	D	D	D	D
6	D	S	U	U	U	D	S	U	U	D