LTE-Advanced时隙接入中动态帧长选择算法

doi:10.11959/j.issn.1000-0801.2017060

Abstract

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

CLC Number:

TN915.6

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.

Figures/Tables 7

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

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