Ping latency optimization
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.
1. A method for reducing Packet Internet Grope (PING) latency in one of a 5G New Radio (NR) or a Long Term Evolution (LTE) system, comprising:
for a second PING request received from a user equipment (UE) following a first PING request received from the UE, performing the following by a distributed unit (DU) of the one of the 5G NR or the LTE system:
estimating a first delay timer (Delay Timer #1) corresponding to anticipated occurrence of a third PING request; and
at the end of the first delay timer, starting a first proactive allocation window containing at least one uplink (UL) grant for the third PING request, wherein the first proactive allocation window contains 11 UL allocations for the third PING request, each UL allocation having three Transmit Time Intervals (TTIs), whereby the size of the first proactive allocation window is 33 TTIs.