B.1 Messages

04.713GPPLocation Services (LCS)Mobile radio interface Layer 3 specificationRelease 1998TS

The following TOA related messages are exchanged between the SMLC and the LMU.

1) Perform TOA Measurement (MLC->LMU)

2) TOA Measurement Result (response to 1. LMU-> MLC)

B.1.1 Perform TOA Measurement Message

The Perform TOA Measurement is a message from the SMLC to the LMU. As a response to it the LMU measures Time Of Arrival of MS transmitted signals. The signal characteristics are specified in the message. It contains the following information elements.

Table B.1: Perform TOA Measurement message content

Information element

Type/Reference

Presence

Message Type

Message Type IE 3.1

M

Measurement Device Info

Measurement Device Info IE 3.2

M

Channel Description

Channel Description IE 3.3

M

Signal Description

Signal Description IE 3.4

M

Timing Description

Timing Description IE 3.5

M

Measurement Options

Measurement Options IE 3.6

O

B.1.2 TOA Measurement Result Message

The TOA Measurement Result is a message from the LMU to the MLC. It is a response to the Perform TOA Measurement message and contains the following information elements.

Table B.2: TOA Measurement Result message content

Information element

Type/Reference

Presence

Message Type

Message Type IE 3.1

M

Number of Measurement Devices

Number of Measurement Devices IE 3.7

M

Timing Info

Timing Info IE 3.8

M

The following is repeated "Number of Measurement Devices" times

Measurement Device ID

Measurement Device ID IE 3.10

M

Measurement Info

Measurement Info IE 3.11

M

Number of Peaks

Number of Peaks IE 3.12

M

The following is repeated "Number of Peaks" times

Measured TOA

Measured TOA IE 3.13

M

TOA Quality

TOA Quality IE 3.14

M