hi,
currently i am
working on radio ressource layer and the sub processes for 1) network selection,
2) cell selection, and 3) location update trigger process. i have problems
expecially with the cell selection task. since it requires measurements and
detection of carriers (for some time depending on the slot configuration),
it must work together with the layer 1 (radio part). here are some examples
of messages what i think must exist between layer 1 and cell selection
process:
(the primitive
names are just examples and do not conform to GSM
specs.)
L1CTL_DM_EST_REQ
(which already exists) tune to a channel in dedicated mode (by given
channel, frequency and later hopping sequence)
L1CTL_IM_EST_REQ
tune to a BCCH channel in idle mode (by given frequency)
L1CTL_IM_EST_CNF
confirm valid carrier signal.
L1CTL_IM_INFO_IND
info when reading of BCCH was enough for a cell selection (depends on the
channel configuration), shall include measurement
L1CTL_MEAS_IND
periodic info of measurements from the selected channel. (required for cell
reselection)
take these only as
examples, not as required messages. while reading GSM 05.08, this is
what i think is required to do cell (re-)selection process or abort radio
connection if fails (below minimum level).
any
help/ideas/suggestions?
andreas