Under what scenario(s) is the UE-initiated dedicated bearer request implemented? This is discussed at 3GPP TS 24.301 at section 6.5.3 and 3GPP TS 23.401 at section 5.4.5. I understand that the UE can initiate a dedicated bearer with specific QoS, but am unsure when this occurs as a practical matter. If there were specific applications that required the UE to request a dedicated bearer, that would be helpful to know.