Cinterion
®
EHS6 AT Command Set
3.2 AT^SIND
EHS6_ATC_V03.001 15/12/3
Confidential / Released
Page 95 of 513
NITZ values are lost when the ME detaches from network. Also when a manual
network selection fails and the ME automatically falls back to the previous net-
work the NITZ values cannot be recalled. Nevertheless an indicated time zone
is valid until a new MMI/GMMI will trigger another NITZ indication.
“psinfo“ Packet Switched Status Indication
"psinfo" indicates the status of the ME related to packet switched data calls.
Please consider that some providers don't support the indication of HSDPA/
HSUPA.
“lsta“ Link Stability Indication (for 2G)
The Link Stability indicator feature allows the EHS6 to output radio link errors
and statistic parameters of signal strength distribution across the band via
URC.
The presentation of the "lsta" indicator is determined by the radio link spectrum
shape. For example, each time a radio link error appears the URC indicates an
Error Downcounter value and the RSSI of the serving cell to provide some kind
of warning. Every consecutive error decrements the Error Downcounter value
and successful downlink signal reception resets it to start value of 11. The fac-
tor on which Error Downcounter is decremented depends on network settings.
Error Downcounter value 0 means that the ME has lost the cell and will start
the cell reselection process. In this case the URC is enhanced and includes the
following statistic parameters of signal strength distribution across the band.
These are:
- Number of reported channels,
- Maximal signal strength value,
- Minimal signal strength value,
- Mean value of signal strength across frequency band and
- Variance of signal strength across frequency band.
To avoid that radio link error URCs are output too often, when radio conditions
are bad, you can select a lower warning level with <lstaLevel>.
Link Stability Indication (for 3G)
URC's are issued for radio link quality and statistic parameters of signal
strength distribution across the band.
In idle mode S-Criteria of serving cell is evaluated each DRX (Discontinuous
Reception) Cycle (64, 128, 256 or 512 frames).
If S-criteria is not met, Cell Reselection Evaluation Process is executed.
If the EHS6 has not found any new suitable cell based on searches and mea-
surements of the neighbor cells indicated in the measurement control system
information for 12 seconds, the EHS6 initiates cell selection procedures for the
selected PLMN.
A DRX counter counts the consecutive DRX cycles that serving cell does not
meet S-criteria during that 12 seconds. This is used for the URCs with <ind-
Value> equals "10".
0 GPRS/EGPRS not available in currently used cell
1 GPRS available in currently used cell
2 GPRS attached
3 EGPRS available in currently used cell
4 EGPRS attached
5 camped on WCDMA cell
6 WCDMA PS attached
7 camped on HSDPA capable cell
8 PS attached in HSDPA capable cell
9 camped on HSDPA/HSUPA capable cell
10 PS attached in HSDPA/HSUPA capable cell
0 Radio link error.
1 Radio link signal strength distribution.
2 Radio link error during voice call.
10 Radio link quality.
11 Radio link signal strength distribution.
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