Table 2. Related information summary.

Descriptions	Notations
Raw dataset for all devices	D = {d1, d2, …, dw}
Single device datasets	di = ((t1, x1), (t2, x2), …, (tn, xn)) i ∈ [1, w]
Noise added dataset for all devices	$D^{*}=\{d_1^{*},d_2^{*},\dots ,d_w^{*}\}$
Single device reconstructed datasets	$d_i^{*}=((t_1,x_1^{*}),(t_2,x_2^{*}),\dots ,(t_n,x_n^{*}))$ i ∈ [1, w]