In the context of wireless communication (specifically device-to-device communication) what is the difference between Power control and Power allocation. I guess the latter is a form of resource allocation however, it seems some researchers (or authors) use them interchangeably. Could anyone clarify this?
An example of such is this Page 10, bottom left
One interesting point is that the performance degradation of the cellular user is not significant as the number of D2D links increases when the centralized power allocation method is applied because the proposed admission control ensures that the uplink user is protected. This implies that the centralized power control method is able to support reliable uplink performance regardless of the density of D2D links.
Another is this Page 1, right column, second paragraph
Apart from resource allocation, power control is also a key technique to achieve high performance –. The authors in  applied a simple power control method to D2D communications, which constrains the signal to interference-plus-noise ratio (SINR) degradation of the cellular link to a certain level. In , the optimum power allocation for different resource sharing modes was derived.