A method of reducing the Packet Internet Grope (PING) latency, e.g., in 5G New Radio (NR) or LTE system, is provided. When first two PING requests are received from a user equipment (UE) in uplink (UL), the UE will use Scheduling Request (SR) and Buffer Status Report (BSR) cycle to obtain UL grants for the first two PING requests. Starting from the third PING request, the size of the proactive allocation window for giving UL allocation to the PING request is uniquely configured, using a “delay timer” and a “proactive allocation window.” The delay timer is to delay the start of the proactive allocation window from the transmission time interval (TTI) in which the packet type is detected. The proactive allocation window is the number of TTIs over which the proactive allocations are given to a UE.