Salp Swarm Algorithm for Node Localization in Wireless Sensor Networks

Table 2

Performance metrics of different localization algorithms.

Target nodes	Anchor nodes	No. of iterations	PSO			BOA			FA			GWO			SSA
			EL(m)	T(s)	NL	EL(m)	T(s)	NL	EL(m)	T(s)	NL	EL(m)	T(s)	NL	EL(m)	T(s)	NL
25	10	25	0.818	0.40	16	0.232	0.37	22	0.265	0.6	19	0.744	0.22	20	0.465	0.35	22
		50	0.812	0.40	15	0.225	0.38	23	0.262	1.2	20	0.741	0.41	21	0.462	0.35	23
		75	0.803	0.41	18	0.223	0.39	25	0.258	1.5	21	0.741	0.54	21	0.458	0.36	23
		100	0.792	0.41	18	0.221	0.40	25	0.251	1.8	19	0.740	0.79	23	0.451	0.37	24
50	15	25	0.419	0.71	41	0.338	0.84	47	0.477	1.6	46	0.690	0.42	44	0.477	0.67	43
		50	0.426	0.73	47	0.332	0.85	48	0.473	1.9	49	0.688	0.63	45	0.472	0.69	47
		75	0.429	0.76	46	0.326	0.86	49	0.465	2.5	49	0.686	0.81	46	0.468	0.69	48
		100	0.434	0.76	48	0.323	0.86	49	0.465	3.5	48	0.682	0.98	48	0.464	0.70	50
75	20	25	0.735	1.31	73	0.257	1.49	66	0.519	2.9	71	0.641	0.72	72	0.519	0.90	69
		50	0.728	1.32	74	0.257	1.49	66	0.513	3.8	72	0.641	0.95	72	0.513	0.92	72
		75	0.728	1.33	74	0.255	1.50	70	0.504	4.7	73	0.638	1.3	73	0.504	0.95	73
		100	0.724	1.35	75	0.253	1.52	72	0.503	5.2	73	0.635	1.4	74	0.503	0.96	75
100	25	25	0.661	2.10	97	0.355	2.40	97	0.711	3.8	98	0.611	1.1	95	0.511	1.31	98
		50	0.658	2.16	97	0.355	2.44	99	0.709	4.2	98	0.606	1.5	97	0.509	1.33	98
		75	0.642	2.17	99	0.333	2.47	100	0.702	5.6	99	0.602	1.8	98	0.502	1.36	99
		100	0.641	2.20	100	0.331	2.50	100	0.704	6.3	98	0.602	2.1	98	0.504	1.37	100
125	30	25	0.754	4.87	120	0.549	3.84	122	0.829	2.7	122	0.589	1.5	122	0.529	1.67	123
		50	0.748	4.86	121	0.548	3.85	123	0.824	4.5	123	0.580	2.2	123	0.524	1.68	124
		75	0.750	4.89	122	0.534	3.86	124	0.822	5.9	125	0.580	2.8	123	0.522	1.70	125
		100	0.752	4.95	125	0.534	3.89	124	0.822	6.5	124	0.572	3.3	125	0.522	1.72	125
150	35	25	0.625	5.41	145	0.766	5.88	147	0.911	2.5	149	0.559	2.8	148	0.511	2.12	149
		50	0.622	5.42	146	0.765	5.61	148	0.909	4.2	150	0.547	3.6	149	0.509	2.14	149
		75	0.619	5.44	148	0.763	5.64	149	0.904	6.4	150	0.523	4.3	150	0.504	2.16	150
		100	0.616	5.45	150	0.763	5.69	149	0.904	7.2	149	0.523	4.8	150	0.504	2.18	150