How can I access future samples of a discrete time signal in Simulink?

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Adriaan Sadie 2018-3-15

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https://ww2.mathworks.cn/matlabcentral/answers/388502-how-can-i-access-future-samples-of-a-discrete-time-signal-in-simulink

I am busy with a project that implements model predictive control and it uses a reference signal's future sample values, i.e. f(k+1), f(k+2), etc. It is easy to generate and access these values in the MATLAB workspace, since all lines are executed sequentially, e.g. :

t = 0:0.02:2;
I_a = sine(2*pi*t);

but Simulink solves all blocks at once. I generate the three-phase signals and convert them to alpha-beta format using the gain, and I want to be able to access the k+1, k+2, etc. timesteps of the two output signals I_alpha and I_beta. See the attached image.