LocByRef Use Cases

1
LocByRef Use Cases

• Rohan Mahy
• November 28, 2006

2
Definition

• LIS combination of an LG (Location Generator)
  and an LS (Location Server)
• pawn ticket URL reference with random
  component. possession authorization.
• authenticated URL reference which requires
  authentication from specific user or group or
  users.

3
Presence Server

• Presence server uses LbyR to subscribe to
  location from LIS
• watcher 1 subscribes to loc/pres value from pres
  server
• watcher 2 clicks find out where I am right now
  on targets web page. web page fetches location
  from pres server using a reference to an
  authenticated URL

my web page
watcher 2
LIS
fetch
subscribe
watcher 1
pres server
subscribe
target
4
Emergency

• If target isnt mobile, it should provide LbyV
• If target is mobile, it should provide LbyR.
  PSAP should subscribe to the location using a
  pawn ticket URL
• going directly to the LG eliminates extra
  machinery
• does the proxy need to fetch the current location
  too? Or is an initial value good enough?

subscription
LIS
PSAP
fetch ?
proxy / SR
target
5
Pizza

• Two ways to provide a ref to Pizza Place
• ref resolving to LIS
• ref resolving to PS
• Looks like this would always be a fetch. So,
  LbyR does not look compelling for Pizza delivery
  (use LbyV instead)

LIS
pizza place
pres server
target
6
Navigation

• My navigation server probably has special
  relationship with me. Often target (me) will
  point its nav server directly at LIS. (Most
  likely subscription but could be fetch)
• I visit a city and go on a tour. I do not want
  to offer direct LIS access to the tourism nav
  server, so I provide a pawn ticket URL from my
  presence server. (Could be either but more
  likely a fetch)

target/ watcher
subscribe or fetch
my nav server
LIS
subscribe
pres server
tourismnav server
subscribe or fetch
target
7
Tracking

• Tracking Server wants to keep track of all
  resources all the time. Needs to subscribe to
  location (probably from LIS). Tracker 1 can
  subscribe or fetch current location
• Tracking app/web page just fetches location
  whenever tracker 2 asks for current location of a
  resource

tracking app/ web page
tracker 2
fetch
fetch
LIS
subscribe
tracking server
tracker 1
subscribe or fetch
target