ts_125331v120300p

3GPP TS 25.331 version 12.3.0 Release 12
1243
ETSI TS 125 331 V12.3.0 (2014-10)
10.3.7.96a
UE positioning GPS reference time uncertainty
Information Element/Group
name
UE Positioning GPS Reference
Time Uncertainty
Need Multi Type and
reference
MP
Integer
(0..127)
Semantics description
This element provides the accuracy of
the provided GPS time, or
alternatively the accuracy of the
provided relation between GPS and
UTRAN time. If "GPS TOW" is the
provided GPS time, or alternatively
the GPS time corresponding to the
UTRAN time provided, then the true
GPS time lies in the interval ["GPS
TOW" − "GPS Reference Time
Uncertainty", "GPS TOW" + "GPS
Reference Time Uncertainty"].
The uncertainty r, expressed in
microseconds, is mapped to a
number K with the following formula:
r = C*(((1+x) K )-1)
with C = 0.0022 and x = 0.18.
To encode any higher value of the
uncertainty than that corresponding to
K=127 in the formula above, or to
indicate an undefined value of the
"GPS TOW", the same value, K=127,
shall be used.
Version
REL-7
NOTE:
This IE is not needed in the SRNS RELOCATION INFO message.
10.3.7.97 UE positioning GPS UTC model
The UTC Model field contains a set of parameters needed to relate GPS time to Universal Time Coordinate (UTC).
Information Element/Group Need Multi Type and Semantics description
name
Reference
A 1 MP Bit string(24) sec/sec [12]
A 0 MP Bit string(32) seconds [12]
t ot MP Bit string(8) seconds [12]
WN t MP Bit string(8) weeks [12]
Δt LS MP Bit string(8) seconds [12]
WN LSF MP Bit string(8) weeks [12]
DN MP Bit string(8) days [12]
Δt LSF MP Bit string(8) seconds [12]
10.3.7.97a
UE positioning GANSS time model
The GANSS time model field contains a set of parameters needed to relate GANSS time for the GANSS indicated by
"GANSS ID" to selected time reference indicated by "GNSS_TO_ID".
ETSI