Meeting memo-30/12/07

The memo of technical meeting with engineers.

1. Issue of scenario
+Global map
-hight-popularity/frequency
-colour - types of music

-colour-freshness of the information
-2D map(colour-density)
-Size of the Map

-I like it -privacy(ad) Should we really need personal information?

+Function I like it
-to tell specific personal information is bit dangerous.
it might cause the issue of AD. some company use this info.
So think about the amount of information we give.

2.Technical issue
+pocket issue ( How GPS can work when the object is in the pocket)

+size of the bubble-10m
if the users works 4m/sec, it takes 4-5sec these users cross by each other.
But, usually to listen to sample music file, each company provide 15-sec.
Maybe, it should be better if each of them can hear at least 7-8sec.
In this case, there is two way to achieve this condition.
1. change the size of the bubble ex) n=>15m
2. when people are crossing, they can exchange 10sec of music file.
so, still people can hear 10sec.
(And then, the volume does fade in and fade out)
-how much data we can send
with Wi-Fi : Each 1sec-20sec of music files

+Accuracy of GPS is 10-15m. so only with GPS we can not show our position on the screen as we want. So the possibility is here.
1. put additional emitter and receiver for each devise.
-put the some sensor and signal
tech how it works) each 0.5 sec culiculate the speed of the signal from other side

But in this case, we can know the distance but not orientation(position of the other user)

2.celle phone-antena- but still its accuracy is wider than GPS

+rather than Wi-FI , bluetooth must be better(can be 10m)
-Wi-Fi takes lots of power