Measurements

Fill in what we are trying to measure. (A vs B etc etc?)

Measurements

• Latency vs. phone signal strength
• Latency vs. server load (i.e. fake phones)
• Dropped packets vs. server load
• Request rate vs. Pacmen drawn

Methodology

How to measure dropped packets?

• Sent from phone to server, but server never receives
  • Two cause: network OR server
• Response sent from server to phone, but phone never receives
  • Only one real cause: network drops the packet => indep variable signal strength
  • Maybe we don't need to measure this, since we can measure network in the phone sending case.
  • This is the uncommon failure case.

How to measure the latency between two phones?

Potential solutions:

• Compare timestamp of sensing GPS on one phone vs. receiving that sensing on another phone (but this would require fairly accurate time synchronization between phones).
• On a single phone, check roundtrip time with another phone (may require reasoning of concurrent behavior of server to tell when a round-trip has really happened or not).
• Calculate the latency indirectly by summing up various sub-latencies (such as phone-to-server latency, plus server wait latency, etc.)