A.11 Multilateration OTD Response
3GPP44.031Location Services (LCS)Mobile Station (MS) - Serving Mobile Location Centre (SMLC) Radio Resource LCS Protocol (RRLP)Release 17TS
A.11.1 General
The Multilateration OTD (MOTD) Response is a RRLP component from the MS to network. This message is sent by the MS in response to the Multilateration OTD Request message containing the multilateration OTD measurement results.
Table A.65 Multilateration OTD Request content
|
Element |
Type/Reference |
Presence |
|
Serving Cell Downlink synchronisation Accuracy |
Serving Cell DL Synch Accuracy. 11.2.1 |
M |
|
MOTD Measurement Results |
MOTD Measurement Results 11.2.2 |
O |
|
MOTD Receive Level Measurements |
MOTD Receive level Measurements 11.2.3 |
O |
A.11.2 Elements
A.11.2.1 Serving Cell Downlink Synchronisation Accuracy
This element indicates the downlink synchronisation accuracy estimated for the serving cell at MS when it measures the OTD with neighbour cells for Multilateration OTD Response.
A.11.2.2 MOTD Measurement Results
This element consists of up to 7 OTD Measurement Information elements each containing the OTD measurement results along with the cell related information. OTD Measurement Information is shown in Table A.66.
Table A.66: OTD Measurement Information
|
OTD Measurement Information |
|
ReportedCell |
|
MS Synchronisation Accuracy |
|
OTD Measurement Result |
The MS Synchronisation Accuracy
This parameter refers to the estimated synchronisation accuracy of the cell for which the OTD measurement with respect to serving cell is measured. MS estimates the synchronisation accuracy based on received downlink synchronisation bursts as specified in 3GPP TS 45.010.
Reported Cell
This field indicates whether the reported cell is cell index within the CellSets given on MOTD Measurement Request message or combination of BSIC and ARFCN.
‘0’ = Reported Cell is given as the index to the cell in the serving Cell Set and Neighbour Cell Sets provided in the MOTD Measurement Request.
‘1’ = Reported Cell is given as BSIC(9 bit) and ARFCN of the cell.
CellIdx
The index of the cell within the Serving Cell Set and Neighbour Cell Sets provided in the MOTD Measurement Request message. The index spans across all the cells of the Serving Cell Set and Neighbour Cell Sets. (For example Index 0 refers to the first cell in the ServingCellSet. If ServingCellSet contains 3 cells, then index 3 refers to the first cell of the first Neighbour Cell Set).
OTD Measurement Result
This parameter indicates the observed time difference between the TDMA frame timing of the measured cell and the serving cell. The time difference is reported modulo 125 normal symbol periods in terms of 1/8 normal symbol period granularity. (For example, if the TDMA frame timing of the neighbour cell is observed to be ⅛ normal symbol period earlier than the TDMA frame timing of the serving cell, 8·((1250-⅛) mod 125) = 999 is reported.)
A.11.2.3 MOTD Receive Level Measurements
This element is included in the MOTD Measurement Response when only one MOTD measurement result can be reported as part of the MOTD Measurement Response. This element consists of Receive Level Information parameters for all neighbour cells that the MS can receive, each consisting of receive level measurement and the cell identity related information. The MOTD Receive Level Measurement Information parameter is shown in Table A.67.
Table A.67: OTD Measurement Information
|
OTD Measurement Information |
|
ReportedCell |
|
Receive Level Measurement |
Reported Cell
Refer to subclause A.10.2.2 for definition and encoding of this parameter.
Receive Level Measurement
This parameter contains the RXLEV measurement of the reported cell. MS measures and reports this value as specified in 3GPP TS 45.008.
Annex B (informative):
Change History
|
Change history |
|||||||
|
Date |
Meeting |
TDoc |
CR |
Rev |
Cat |
Subject/Comment |
New version |
|
2017-03 |
Release 14 version (frozen at TSG-75) |
14.0.0 |
|||||
|
2017-06 |
RP-76 |
RP-170923 |
0227 |
8 |
B |
Introduction of Multilateration |
14.1.0 |
|
2017-06 |
RP-76 |
RP-170923 |
0228 |
3 |
B |
Introduction of Multilateration OTD |
14.1.0 |
|
2017-09 |
RP-77 |
RP-171593 |
0230 |
– |
F |
Clarification to GANSS time model |
14.2.0 |
|
2017-12 |
RP-78 |
RP-172189 |
0231 |
– |
F |
RRLP ASN.1 syntax corrections for Multilateration Positioning and GANSS |
14.3.0 |
|
2018-06 |
RP-80 |
RP-180822 |
0234 |
– |
B |
Security Enhancement for MTA in network configuration without LLC security |
15.0.0 |
|
2020-07 |
RP-88e |
– |
– |
– |
– |
Upgrade to Rel-16 version without technical change |
16.0.0 |
|
2022-03 |
RP-95e |
– |
– |
– |
– |
Upgrade to Rel-17 version without technical change |
17.0.0 |