移动终端异系统间切换的改进

doi:10.12305/j.issn.1001-506X.2022.08.33

Abstract

Abstract:

In the early stage of 5G network construction, compared with the comprehensive coverage of 4G network, the coverage of 5G network is not wide enough. In that case, 5G terminals will frequently switch between the two networks. If the terminals only pass through the area covered with 5G network in a short period of time, the terminals will perform unnecessary switching procedures twice, resulting in waste of signaling and power. After analyzing the signaling flow in the non-access layer of the mobile terminal protocol stack, the method of delayed handover is proposed to reduce the times of unnecessary switches, where the terminals have to wait for a period of time before switching to the 5G network. As can be seen from the modeling and simulation part, the method of delayed handover can guarantee the user experience as well as reducing handover times. Through analysis, this paper also shows the optimal delay time to make the benefits of the delay switching strategy greater.

Key words: intersystem switching, non-access stratum, delayed switching, signaling overhead

CLC Number:

TN929.53

Fatang CHEN, Jietang ZHANG, Pei HE, Junlin HUANG. Improvement of handover between different systems of mobile terminals[J]. Systems Engineering and Electronics, 2022, 44(8): 2668-2676.

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References 25

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$\mathrm{E}\left[t_{c}\right]=1 / \lambda=50, \eta_{l}=50 \lambda, v_{l}=10 / \eta_{l}^{2}, \eta_{n}=200 \lambda, v_{n}=1000 / \eta_{n}^{2}$
t_d		1/10λ	1/20λ	1/30λ	1/40λ	1/50λ
r(t_d)	分析值	0.002 346 2	0.003 064 9	0.003 483 2	0.003 778 5	0.004 006 7
	仿真值	0.002 265 9	0.002 965 0	0.003 398 6	0.003 861 8	0.003 897 9
	误差	0.035 453 0	0.033 676 9	0.024 913 2	0.022 231 7	0.027 909 8
ρ(t_d)	分析值	0.913 286 7	0.949 793 8	0.963 851 2	0.971 462 1	0.976 284 3
	仿真值	0.911 432 17	0.951 084 4	0.964 770 8	0.970 058 9	0.975 159 3
	误差	0.002 034 87	0.001 357 0	0.000 953 1	0.001 446 5	0.001 153 7

$\mathrm{E}\left[t_{c}\right]=1 / \lambda=50, v_{l}=10 / \eta_{l}^{2}, \eta_{n}=200 \lambda, v_{n}=1000 / \eta_{n}^{2} $
t_d		1/10λ	1/20λ	1/30λ	1/40λ	1/50λ
r(t_d)	η_l=50λ	0.002 346 2	0.003 064 9	0.003 483 2	0.003 778 5	0.004 006 7
r(t_d)	η_l=100λ	0.002 346 2	0.003 064 9	0.003 483 2	0.003 778 5	0.004 006 7
ρ(t_d)	η_l=50λ	0.913 286 7	0.949 793 8	0.963 851 2	0.971 462 1	0.976 284 3
ρ(t_d)	η_l=100λ	0.913 286 7	0.949 793 8	0.963 851 2	0.971 462 1	0.976 284 3

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Improvement of handover between different systems of mobile terminals

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