I have never played a game in 24 years of online gaming that EVER used ping as a one way measurement.
Granted that doesn’t mean all games do that, but Overwatch is the first game I’ve ever played that does it.
And no they haven’t done it for more than 10 years, because 20 years ago, there was no one way defined ping time.
Even BNS doesn’t use one way ping times, and it only measures skill ping times, but DOES NOT include motion in game as part of the ping value.
Furthermore,
Round-trip delay time. In telecommunications, the round-trip delay time (RTD) or round-trip time (RTT) is the length of time it takes for a signal to be sent plus the length of time it takes for an acknowledgement of that signal to be received.
Latency Definition. Latency is the amount of time a message takes to traverse a system. In a computer network, it is an expression of how much time it takes for a packet of data to get from one designated point to another. It is sometimes measured as the time required for a packet to be returned to its sender.
The ping is the reaction time of your connection–how fast you get a response after you’ve sent out a request. A fast ping means a more responsive connection, especially in applications where timing is everything (like video games). Ping is measured in milliseconds (ms).
I’m sorry but I don’t see the difference in definition you are trying to illustrate, can you explain more what you mean exactly?
Even the Ping command itself doesn’t work in one direction.
The Internet Ping program works much like a sonar echo-location, sending a small packet of information containing an ICMP ECHO_REQUEST to a specified computer, which then sends an ECHO_REPLY packet in return. The IP address 127.0.0.1 is set by convention to always indicate your own computer.
I believe what you are confusing is what’s called OWAMP:
OWAMP is a command line client application and a policy daemon used to determine one way latencies between hosts. It is an implementation of the OWAMP protocol as defined by SNIP (When referring to the protocol within this document, “OWAMP” will be in italicized. In all other instances, “OWAMP” will be referring to this implementation.)
Ping works through TCP and UDP protocols. To clarify OWAMP has it’s own network protocol. Which most people don’t use on gaming client machines, short of if they are playing the game from work then the possibility exists.