基于层次分析法的WLAN/蜂窝网络切换判决算法

doi:10.3969/j.issn.1000-436x.2013.02.008

Abstract

Abstract:

For WLAN/cellular network, a handoff decision algorithm was proposed based on analytic hierarchy process.Considering the network status and user’s traffic features, SAW and TOPSIS are simulated in the proposed algorithm.Compared with SAW,simulation results show that the analytic hierarchy ana is with TOPSIS is more suitable for network handoff decision of delay sensitive applications.

Key words: handoff decision, analytic hierarchy process, heterogeneous networks, SAW, TOPSIS

Jun LIU,Xiao-nan LI. Handover algorithm for WLAN/cellular networks with analytic hierarchy process[J]. Journal on Communications, 2013, 34(2): 65-72.

Figures/Tables 19

References 20

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重要性比较	a_ij
相等	1
稍重要	3
重要	5
很重要	7
极重要	9

n	R_I
1	0
2	0
3	0.52
4	0.89
5	1.12
6	1.26
7	1.36
8	1.41
9	1.46
10	1.49
11	1.52
12	1.54

网络	信号强度	带宽/(M/bit·s^{- 1})	价格	时延ms	误比特率/%	安全性
C₁(UMTS)	高	2	非常高	15	9	中
C₂(WLAN1)	中	11	低	40	5	低
C₃(WLAN2)	低	11	非常低	20	7	中

尺度	1 (2级)	2 (3级)	3 (5级)	4 (5级)	5 (6级)	6 (7级)	7 (9级)	8 (11级)
无								0.045
非常低			0.091		0.083	0.091	0.083	0.136
非常低-低							0.13	0.254
低		0.167	0.283	0.115	0.25	0.227	0.25	0.333
较低				0.3	0.417		0.37
不怎么低						0.364		0.409
中	0.584	0.5	0.5	0.5		0.5	0.5	0.5
不怎么高						0.636		0.591
较高				0.7	0.583		0.63
高	0.75	0.833	0.717	0.855	0.75	0.773	0.75	0.667
高-非常高							0.87	0.746
非常高			0.909		0.917	0.909	0.917	0.864
极高								0.955

D	X₁	X₂	X₃	X₄	X₅	X₆
C₁	0.717	2	0.909	15	9	0.5
C ₂	0.5	11	0.283	40	5	0.283
C ₃	0.283	11	0.091	20	7	0.5

Handover algorithm for WLAN/cellular networks with analytic hierarchy process

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			话音业务
话音业务
话音业务
	信号强度	带宽	价格	时延	误比特率	安全性
信号强度	1	5	7	3	9	8
带宽	1/5	1	2	1/3	4	3
价格	1/7	1/2	1	1/5	3	2
时延	1/3	3	5	1	7	6
误比特率	1/9	1/4	1/3	1/7	1	1/2
安全性	1/8	1/3	1/2	1/6	2	1

			下载业务
下载业务
下载业务
	信号强度	带宽	价格	时延	误比特率	安全性
信号强度	1	3	7	9	5	8
带宽	1/3	1	4	7	2	6
价格	1/7	1/4	1	4	1/2	2
时延	1/9	1/7	1/4	1	1/5	1/2
误比特率	1/5	1/2	2	5	1	4
安全性	1/8	1/6	1/2	2	1/4	1

业务	λ_{m ax}	C_I	R_I	C_R
话音业务	6.196	0.039	1.26	0.031＜0.1
下载业务	6.207	0.041	1.26	0.033＜0.1

1.000	0.182	0.1.00	1.000	0.556	1.000
0.697	1.000	0.322	0.375	1.000	0.566
0.395	1.000	1.000	0.750	0.714	1.000

0.780	0.128	0.993	0.318	0.723	0.656
0.544	0.701	0.309	0.848	0.402	0.371
0.308	0.701	0.099	0.424	0.562	0.656

0.370	0.015	0.071	0.083	0.023	0.031
0.258	0.081	0.022	0.221	0.013	0.017
0.146	0.081	0.007	0.111	0.018	0.031

0.372	0.030	0.078	0.009	0.098	0.030
0.260	0.165	0.024	0.025	0.055	0.017
0.147	0.165	0.008	0.012	0.076	0.030

算法	话音业务	下载业务
SAW法	C₁，C₃，C₂	C₂，C₁，C₃
TOPSIS法	C₁，C₂，C₃	C₂，C₁，C₃

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