随机接入中基于一次碰撞序列的接入策略设计

doi:10.19665/j.issn1001-2400.2020.06.003

西安电子科技大学学报 ›› 2020, Vol. 47 ›› Issue (6): 13-20.doi: 10.19665/j.issn1001-2400.2020.06.003

• 面对B5G/6G的信息传输与接入技术进展 • 上一篇下一篇

随机接入中基于一次碰撞序列的接入策略设计

汤小波(),李里,郝莉,范平志

西南交通大学信息科学与技术学院,四川成都 610031

收稿日期:2020-06-30 出版日期:2020-12-20 发布日期:2021-01-06
作者简介:汤小波 (1992—),男,西南交通大学博士研究生,E-mail: xiaobo576212387@163.com
基金资助:
国家重点研发项目(2018YFB1801104);四川省国际科技创新合作项目(2020YFH0011)

Access strategy design based on one-coincidence sequence in random access

TANG Xiaobo(),LI Li,HAO Li,FAN Pingzhi

The School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

Received:2020-06-30 Online:2020-12-20 Published:2021-01-06

摘要/Abstract

摘要：

在基于多阶段前导序列传输的随机接入策略中,由于基站可能无法正确恢复设备所使用的多阶段前导序列,从而出现多阶段前导序列检测模糊性问题。针对多阶段前导序列检测模糊性问题,提出了一种基于一次碰撞序列的多阶段前导序列设计方法。该方法通过绑定多个前导序列间组合方式,有效地消除了多阶段前导序列检测模糊性。此外,为有效扩展前导序列资源池规模,在所设计的多阶段前导序列基础上,还引入了标签前导机制。仿真表明,相比于传统基于单阶段前导序列传输的接入策略,带标签多阶段前导序列传输的接入策略能在消除序列检测模糊性的同时扩展前导资源池,进而降低前导碰撞概率,并提高随机接入成功率。

关键词: 随机接入, 多阶段前导序列传输, 一次碰撞序列

Abstract:

In multi-stage preamble (MSPA) transmission based random access (RA), the base station may fail to combine every individually detected preamble to a legitimate MSPA selected by an active device. This phenomenon is called the preamble detection ambiguity of MSPA transmission based RA. In this paper, we propose a one-coincidence sequence aided MSPA construction method. The proposed method which effectively extends the RA resource pool and eliminates the MSPA detection ambiguity. Furthermore, a tag is further incorporated into our RA strategy to facilitate active MSPA detection. Simulation results show that compared with the traditional single-stage PA transmission based RA strategy, our tagged MSPA RA strategy achieves a better RA performancein terms of the probability of PA collision and access success probability.

Key words: random access, multi-stage preamble transmission, one-coincidence sequence

中图分类号:

TN929.5

汤小波,李里,郝莉,范平志. 随机接入中基于一次碰撞序列的接入策略设计[J]. 西安电子科技大学学报, 2020, 47(6): 13-20.

TANG Xiaobo,LI Li,HAO Li,FAN Pingzhi. Access strategy design based on one-coincidence sequence in random access[J]. Journal of Xidian University, 2020, 47(6): 13-20.

图/表 8

表1

可用发生器序列示例"

G₀	$G 0, G 1, G 2, G 3$
30	{30,31,34,33},{30,33,34,31}
31	{31,30,33,34},{31,34,33,30}
33	{33,30,31,34},{33,34,31,30}
34	{34,31,30,33},{34,33,30,31}

表1

图1

表2

图2

图3

图4

图5

图6

参考文献 11

[1]	JANG H S, KIM S M, KO K S, et al. Spatial Group Based Random Access for M2M Communications[J]. IEEE Communications Letters, 2014, 18(6): 961-964. doi: 10.1109/LCOMM.2014.2320970
[2]	KIM T, JANG H S, SUNG D K. An Enhanced Random Access Scheme with Spatial Group Based Reusable Preamble Allocation in Cellular M2M Networks[J]. IEEE Communications Letters, 2015, 19(10): 1714-1717.
[3]	PRATAS N K, THOMSEN H, STEFANOVIC Ĉ, et al. Code Expanded Random Access for Machine-type Communications[C]// Proceedings of the 2012 IEEE Globecom Workshops. Washington: IEEE Computer Society, 2012: 1681-1686.
[4]	VURAL S, WANG N, FOSTER G, et al. Success Probability of Multiple-preamble-based Single-attempt Random Access to Mobile Networks[J]. IEEE Communications Letters, 2017, 21(8): 1755-1758. doi: 10.1109/LCOMM.2017.2697420
[5]	3GPP TSG RAN WG1 Meeting #88 On NR RACH Preamble Designc.R1-1702065[R/ON].[2020-04-20]. http//www3gppong/ttp/TTS.RAN/EG1.RL1/TSGR1.88Docs/R1-1702065.zip.
[6]	3GPP TSG RAN WG1 Meeting #88bis. On NR RACH Preamble Design.R1-1704540[R/ON].[2020-04-20]. https//www3gpp ong/ttp/TTS.RAN/EG1.RL1/TSGR1.88b/Docs/R1-1704540.zip.
[7]	JIANG H, QU D, DINGJ, et al. Multiple Preambles for High Success Rate of Grant-Free Random Access with Massive MIMO[J]. IEEE Transactions on Wireless Communications, 2019, 18(10): 4779-4789.
[8]	BIN L. One-Coincidence Sequences with Specified Distance Between Adjacent Symbols for Frequency-Hopping Multiple Access[J]. IEEE Transactions on Communications, 1997, 45(4): 408-410.
[9]	SHAAR A A, DAVIES P A. Survey of One-coincidence Sequences for Frequency-hopped Spread-spectrum Systems[J]. IEE Proceedings. Part F. Communications, Radar and Signal Processing, 1984, 131(7): 719-724.
[10]	FUKSHANSKY L, SHAAR A A. A New Family of One-coincidence Sets of Sequences with Dispersed Elements for Frequency Hopping CDMA Systems[J]. Advancesin Mathematics of Communications, 2018, 12(1): 181-188.
[11]	JANG H S, KIM S M, PARKH S, et al. An Early Preamble Collision Detection Scheme Based on Tagged Preambles for Cellular M2M Random Access[J]. IEEE Transactions on Vehicular Technology, 2017, 66(7): 5974-5984. doi: 10.1109/TVT.2016.2646739

参数	取值
总设备个数M	1 000,3 000,5 000,7 000,10 000
信噪比(SNR)/dB	-10
前导传输阶段个数S	1,2,4
前导序列和标签ZC序列检测阈值γ_PA和γ_tag/dB	-6, -6
多阶段前导序列集个数n_MSPA	2,4
设备到达时间周期/s	2.0,0.5
设备到达时间分布	Beta分布,(α,β)=(3,4)
式(7)中参数j	0
通用资源池前导序列长度N_ZC	139
通用资源池前导个数N_PA	64
单阶段前导序列个数	64
单阶段前导序列长度	279(S=2),557(S=4)
无标签多阶段前导资源池序列个数	64
带标签多阶段前导资源池序列个数	128(n_MSPA=2),256(n_MSPA=4)
可分配PUSCH资源个数	15

随机接入中基于一次碰撞序列的接入策略设计

Access strategy design based on one-coincidence sequence in random access

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