LAA系统在非授权频段上的动态子帧配置策略

doi:10.11959/j.issn.1000-0801.2016193

Abstract

Abstract:

The use of dynamic TDD technology in heterogeneous network can effectively increase the system throughput and improve the performance of the system.Due to the limitation of signaling control and other issues,there is usually a dynamic switching between the traditional seven fixed sub-frame ratios in the licensed bands.But as a complement to the LTE system worked in the licensed bands,the unlicensed bands can achieve a more flexible and complete dynamic sub-frame configuration without considering signaling control and other issues.Two new dynamic sub-frame configuration algorithms in unlicensed bands were proposed and compared with traditional static sub-frame configuration,then the impact of dynamic sub-frame allocation algorithms on system performance was verified by LAA system level simulation platform.The results show that the proposed dynamic sub-frame configuration strategies can effectively improve the resource utilization and the overall system throughput.

Key words: dynamic sub-frame configuration, licensed-assisted access, unlicensed band, system level simulation

Wei JIANG,Shixiao LIU,Heng HU,Chenlu ZHANG. LAA system dynamic sub-frame configuration strategy in unlicensed bands[J]. Telecommunications Science, 2016, 32(7): 61-67.

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References 13

[1]	3GPP.Study on licensed-assisted access using LTE:RP-14146[S]. 2014.
[2]	GHOSH A , RATASUK R , MONDAL B , et al. LTE-advanced:next-generation wireless broadband technology[J]. IEEE Wireless Communications, 2010,17(3): 10-11.
[3]	KHORYAEV A , CHERVYAKOV A , SHILOV M , et al. Performance analysis of dynamic adjustment of TDD uplink-downlink configuration in outdoor picocell LTE networks[C]// IEEE International Congress on Ultra Modern Telecommunications and Control Systems and Workshop (ICUMT), October 3-5, 2012, St.Peterburg,Russia. New Jersey: IEEE Press, 2012: 914-921.
[4]	李原草，高月红，张欣 . 动态TDD在LTE异构网络下的性能分析[J]. 移动通信， 2013(8): 175-178. LI Y C , GAO Y H , ZHANG X . Dynamic TDD LTE under heterogeneous network performance analysis[J]. Journal of Mobile Communications, 2013(8): 175-178.
[5]	CATANIA D , SARRET M G , CATTONI A F , et al. The potential of flexible UL/DL slot assignment in 5G systems[C]// 2014 IEEE 80th Vehicular Technology Conference(VTC Fall), September 14-17, 2014, Vancouver,USA. New Jersey: IEEE Press, 2014: 1-6.
[6]	王映民，孙韶辉 . TD-LTE技术原理与系统设计[J]. 北京：人民邮电出版社， 2010: 56-57. WANG Y M , SUN S H . LTE principle and system design[M]. Beijing: Posts and Telecom Press, 2010: 56-57.
[7]	3GPP.Physical channels and modulation: TS36.211v9.1.0[S]. 2012.
[8]	邓一伟，申敏，张晨璐，等. LAA信道检测机制研究与仿真[J]. 移动通信， 2015,39(22): 40-44. DENG Y W , SHEN M , ZHANG C L , et al. The LAA channel detection mechanism research and simulation[J]. Journal of Mobile Communications, 2015,39(22): 40-44.
[9]	3GPP.Discussion on LAA issues: R2-150548,HTC[S]. 2015.
[10]	3GPP.Study on licensed-assisted access to unlicensed spectrum: TR 36.889[S]. 2014.
[11]	李忻，聂在平 . MIMO信道中衰落信号的空域相关性评估[J]. 电子学报， 2004(12): 14-18. LI X , NIE Z P . Space correlation evaluation of fading signal in MIMO channel[J]. Journal of Electronics, 2004(12): 14-18.
[12]	3GPP.Further advancements for E-UTRA physical layer aspects: TR36.814 v9.0.0[S]. 2012.
[13]	ANIBA G , AISSA S . Adaptive proportional fairness for packet scheduling in HSDPA[C]// IEEE Global Telecommunications Conference, November 29-December 3, 2004, Alcatel,USA. New Jersey: IEEE Press, 2004: 4033-4037.

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上下行配置格式	上下行转换周期/ms					子帧号
上下行配置格式	上下行转换周期/ms	0	1	2	3	4	5	6	7	8	9
0	5	D	S	U	U	U	D	S	U	U	U
1	5	D	S	U	U	D	D	S	U	U	D
2	5	D	S	U	D	D	D	S	U	D	D
3	10	D	S	U	U	U	D	D	D	D	D
4	10	D	S	U	U	D	D	D	D	D	D
5	10	D	S	U	D	D	D	D	D	D	D
6	5	D	S	U	U	U	D	S	U	U	D

参数	假设
小区拓扑结构	7小区，正六边形部署，3扇区/小区， 1个簇（2个运营商）/扇区，4个 LAA基站/运营商/簇
系统带宽	20 MHz，单载波
载波频率	5 GHz
微基站发射功率	18 dBm
UE发射功率	18 dBm
簇内微基站的半径	50 m
每个簇内UE的距离	同运营商之间大于3 m，异运营商间大于10 m
UE噪声参数	9 dB
路径损耗	微基站—微基站，微基站—用户：TR 36.814^[12]ITU Umi；
	用户—用户：TR 36.843（D2D）
穿透损耗	室外：0 dB
	室内：27 dB+0.5 din（din是[0,min（25，用户到微基站的距离）的一个随机数值]）
阴影衰落	ITU Umi（参照TR 36.814表B.1.2.1-1）
天线配置	下行：2Tx 2Rx 上行：1Tx 2Rx
天线高度	10 m
UE天线高度	1.5m
天线增益+连接器损耗	5 dBi
UE天线增益	0 dBi
传输机制	下行：TM4,QPSK/16QAM/64QAM
	上行：TM1
调度模型	PF
CCA-ED	-62 dBm
业务模型	FTP3，分组大小为0.5 MB

LAA system dynamic sub-frame configuration strategy in unlicensed bands

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