SIB11 Cell Info List
Last updated: January 15, 2009
You can specify neighbor cell information for the test set to broadcast in SIB11 on the BCCH.
There are three cell lists that the test set can send in SIB11: intra-frequency cell info list, inter-frequency cell info list and inter-RAT (GSM) cell list. To specify the details of these cell lists, see:
These settings can only be changed when the call status is idle. Changing any of these settings while in active cell operating mode will result in the execution of the BCCH Update procedure (see
Broadcast Channel (BCCH) Update Procedure (SIB Contents)
).
You can also specify that no cell lists are included using the
Cell Info List
setting.
Note that regardless of the
Cell Info List
setting, the test set does not actually generate any of these neighbor cells, it simply broadcasts a list of neighbor cells to the UE. However if you set
Intra-freq 1st Cell Scrambling Code
to the same value as the
Primary Scrambling Code
for cell 1 (see
Downlink Channel Codes and Levels
), then the
Intra-freq 1st
neighbor cell is mapped to the actual cell 1 signal from the test set. Also, for the lab application only, if you set
Intra-freq 2nd Cell Scrambling Code
to the same value as
Cell2 Primary Scrambling Code
then the
Intra-freq 2nd
neighbor cell is mapped to the actual cell 2 signal from the test set. Mapping the intra-frequency neighbor cells to cell 1 and cell 2 in this way allows you to most closely emulate a real network situation. Also, for some devices, mapping cell 2 in this way may be required to allow successful soft handover (see
Some UEs require Cell 2 Primary Scrambling Code = Intra Freq 2nd Cell Scrambling Code
)
Cell Numbering Convention
Note, the information specified by
Intra-freq
1st
Cell State
and
Intra-freq
1st
Cell Scrambling Code
is transmitted in SIB11 as the information pertaining to "intra-frequency cell id" =
0
, as the "intra-frequency cell id" Information Element begins its numbering at 0; see 3GPP TS 25.331 10.3.7.33). Likewise, the information specified by
Intra-freq
2nd
Cell State
and
Intra-freq
2nd
Cell Scrambling Code
is transmitted in SIB11 as the information pertaining to "intra-frequency cell id" =
1
, etc. If you set the state of a cell to
Off
, then no information is sent for the "intra-frequency cell id" corresponding to that cell. This numbering convention is also true for the "inter-frequency cell id" for inter-frequency cells (see 3GPP TS 25.331 10.3.7.13) and "inter-RAT cell id" for GSM cells (see 3GPP TS 25.331 10.3.7.23).
Cell Lists
-
Intra-frequency Cells
Intra-frequency cells are WCDMA neighbor cells on the same frequency as the serving cell, but with a different primary scrambling code.
The intra-frequency cell info list sent in SIB11 can include up to 8 cells, indexed from 0 to 7.
-
Intra-freq <num> Cell State
You can specify that some or all of the 8 intra-frequency neighbor cells are present (
Intra-freq <num> Cell State
=
On
) or not present (
Intra-freq <num> Cell State
=
Off
) in the intra-frequency cell info list.
GPIB command:
CALL[:CELL]:BCCHannel:ITAFrequency:STATe
-
Intra-freq <num> Cell Scrambling Code
You can specify each intra-frequency cell's primary scrambling code. You may include the serving cell (test set) in the intra-frequency cell info list by including its primary scrambling code as one of the
Intra-freq <num> Cell Scrambling Code
entries.
GPIB command:
CALL[:CELL]:BCCHannel:ITAFrequency:SCODe
-
Intra-freq <num> Cell Cell Reselection Offset1
In the lab application only, this setting specifies the Qoffset1 value signalled for each intra-frequency cell (see 3GPP TS 25.304 s5.2.6.1.4). This setting is only used by the UE when
Quality Measure
is set to CPICH RSCP.
GPIB command:
CALL[:CELL]:BCCHannel:ITAFrequency:CRESelection:OFFSet[1]
-
Intra-freq <num> Cell Cell Reselection Offset2
In the lab application only, this setting specifies the Qoffset2 value signalled for each intra-frequency cell (see 3GPP TS 25.304 s5.2.6.1.4). This setting is only used by the UE when
Quality Measure
is set to CPICH Ec/N0.
GPIB command:
CALL[:CELL]:BCCHannel:ITAFrequency:CRESelection:OFFSet2
-
Inter-frequency Cells
Inter-frequency cells are W-CDMA neighbor cells on a different frequency than the serving cell, and possibly with a different primary scrambling code.
The inter-frequency cell info list sent in SIB11 can include up to 8 cells, indexed from 0 to 7.
-
GSM Cells
The inter-RAT cell list sent in SIB 11 can include up to 8 GSM cells, indexed from 0 to 7.
-
GSM <num> Cell State
You can specify that some or all of the 8 inter-RAT neighbor cells are present (
GSM <num> Cell State
=
On
) or not present (
GSM <num> Cell State
=
Off
) in the inter-RAT cell list.
GPIB command:
CALL[:CELL]:BCCHannel:GSMSystem:STATe
-
GSM <num> Cell NCC
You can specify each GSM cell's NCC.
GPIB command:
CALL[:CELL]:BCCHannel:GSMSystem:NCC
-
GSM <num> Cell BCC
You can specify each GSM cell's BCC.
GPIB command:
CALL[:CELL]:BCCHannel:GSMSystem:BCC
-
GSM <num> Cell Shared ARFCN Indicator
You can specify each GSM cell's Shared ARFCN Indicator.
GPIB command:
CALL[:CELL]:BCCHannel:GSMSystem:BAND
-
GSM <num> Cell BCH ARFCN
You can specify each GSM cell's BCH ARFCN.
GPIB command:
CALL[:CELL]:BCCHannel:GSMSystem:BCHannel
-
GSM <num> Cell Cell Reselection Min Rx Level
This parameter is only available in the lab application.
This parameter sets 3GPP TS 25.331 s10.3.2.3 "Qrxlevmin" for GSM in the "Cell selection and re-selection info for SIB11/12" information element (see 25.331 s10.3.2.4). According to 3GPP TS 25.304 s5.2.6.1.4, Qrxlevmin is the "minimum required RX level in the cell (dBm)". For GSM cells, the UE compares the RSSI it measures for the cell with Qrxlevmin to determine if it may select/reselect to the cell. (Note that this is similar to the RXLEV_ACCESS_MIN parameter defined in 3GPP TS 44.018 s10.5.2.4 and 45.008 s6.4 and s9.)
GPIB command:
CALL[:CELL]:BCCHannel:GSMSystem:CRESelection:RLMinimum
You can specify whether or not the test set broadcasts these neighbor cell lists in SIB11 using the following setting:
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