LTE-Advanced时隙接入中动态帧长选择算法

doi:10.11959/j.issn.1000-0801.2017060

电信科学 ›› 2017, Vol. 33 ›› Issue (3): 8-13.doi: 10.11959/j.issn.1000-0801.2017060

LTE-Advanced时隙接入中动态帧长选择算法

段红光,卢松品,王利飞,王胜,李同会,谭丹

重庆邮电大学，重庆400065

修回日期:2017-02-23 出版日期:2017-03-01 发布日期:2017-04-05
作者简介:段红光（1969-），男，重庆邮电大学正高级工程师、硕士生导师，主要研究方向为新一代宽带移动通信核心芯片、协议及系统应用、宽带无线通信。|卢松品（1990-），男，重庆邮电大学硕士生，主要研究方向为新一代宽带移动通信核心芯片、无线接入网、5G MTC增强。|王利飞（1990-），男，重庆邮电大学硕士生，主要研究方向为移动通信、卫星系统时频同步。|王胜（1990-），男，重庆邮电大学硕士生，主要研究方向为物联网、无线资源管理。|李同会（1992-），女，重庆邮电大学硕士生，主要研究方向为移动通信技术、无线资源管理。|谭丹（1990-），女，重庆邮电大学硕士生，主要研究方向为5G双连接技术及无线接入网。
基金资助:
国家科技重大专项基金资助项目(2015ZX03001026-002)

Dynamic frame length selection algorithm for slotted access in LTE-Advanced

Hongguang DUAN,Songpin LU,Lifei WANG,Sheng WANG,Tonghui LI,Dan TAN

Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Revised:2017-02-23 Online:2017-03-01 Published:2017-04-05
Supported by:
The National Science and Technology Major Project of China(2015ZX03001026-002)

摘要/Abstract

摘要：

通过分析LTE-Advanced系统中基于时隙接入信道控制协议（SCACP）的随机接入模型，提出一种时隙接入方法中接入帧长的优化算法。利用网络实时接入负载实现时隙接入中动态帧长的选择，使得优化后的接入帧长更适合当前接入负载，保障了较高的接入成功率，消除了不必要的接入时延，还在一定程度上减少了前导重传次数。最后通过仿真验证了所提动态帧长选择算法的有效性和实用性。

关键词: LTE-Advanced, 随机接入, 时隙接入, 动态帧长

Abstract:

Through analyzing the random access model of slotted access based channel access control protocol (SCACP) in LTE-Advanced system, an optimization algorithm for access frame length selection based on slotted access was proposed. The dynamic frame length selection in slotted access based on network real-time access load was realized. Moreover, the optimized access frame length was more suitable for current access load than before. It could ensure a high success rate of access, eliminate the unnecessary access delay and decrease the number of retransmissions to some extent. The simulation results demonstrate that the proposed dynamic frame length selection algorithm is more effective and practical.

Key words: LTE-Advanced, random access, slotted access, dynamic frame length

中图分类号:

TN915.6

段红光,卢松品,王利飞,王胜,李同会,谭丹. LTE-Advanced时隙接入中动态帧长选择算法[J]. 电信科学, 2017, 33(3): 8-13.

Hongguang DUAN,Songpin LU,Lifei WANG,Sheng WANG,Tonghui LI,Dan TAN. Dynamic frame length selection algorithm for slotted access in LTE-Advanced[J]. Telecommunications Science, 2017, 33(3): 8-13.

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参考文献 13

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参数	含义	配置
M	MTC设备数量	5 000～30 000
p(t)	MTC设备到达	Beta(3,4)
T/s	MTC设备到达周期	10
N_A	可用前导数目	54
T_RAR/子帧	基站处理时间	2
W_RAR/子帧	响应窗口	5
T_RA/子帧	相邻接入时隙间隔	5
W_bo/子帧	退避窗口	20
N_ptmax	前导最大重传次数	10
N_UL	msg2响应限制	15
p_n	基站检测概率	p_n=1-e^-n
T_RA/子帧	相邻接入时隙间隔	5
N_HARQ	msg3/msg4重传限制	5
p_f	msg3/msg4重传概率	0.1
W_s/RAslot	滑动窗口	16
H_thr/L_thr	高/低负载门限	120/40
R	滞后提前量	10
L	接入帧长	1～128

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LTE-Advanced时隙接入中动态帧长选择算法

Dynamic frame length selection algorithm for slotted access in LTE-Advanced

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