3G FDD Neighbour Cells

3G FDD Neighbour Cells

Last updated: December 2, 2008

This section is only applicable to the lab applications.

The test set can transmit a list of 3G FDD Neighbour Cells and the associated measurement parameters. The Mobile Station can then decode the information carried about the 3G FDD neighbour cells and subsequently make measurements on them. You can:

Configuring 3G FDD Neighbours Table

You can specify 3G FDD Neighbour cells for the 3G FDD radio interface technology within a GSM/GPRS/EGPRS cell. The test set transmits the list of 3G FDD neighbour cells for the mobile station to decode and measure.

The default 3G FDD neighbour cell list is empty, so there is no information in the list for the test set to transmit to the mobile station. The 3G FDD neighbour cell list must have at least one valid entry in order for the test set to broadcast the information to the mobile station. For each 3G FDD neighbour cell specified the following information must always be provided: UARFCN, scrambling code indication, scrambling code, diversity indicator and the reporting priority. The test set uses the scrambling code indicator to indicate whether or not the scrambling code and diversity indicator are used. The scrmabling code indicator is only applicable if you are setting the 3G FDD neighbour list via GPIB command, it is not present on the MUI.

The number of 3G FDD neighbour cells that may be specified depends on a combination of the number of unique UARFCNs and the number of unique scrambling codes used. The table below shows which combinations of unique UARFCNs and scrambling codes the test set will allow.

Table 1: Unique UARFCN and Scrambling Code Restrictions
Number of Unique UARFCNs Number of Unique Scrambling Codes
1 13
2 6
3 6


5 0

For example, if no unique scrambling codes are used, there can five unique UARFCNs specified. That is, if you wish to have 5 different 3G FDD neighbour cells, no scrambling codes can be used.

Once the FDD neighbour cell list is specified, the test set transmits the list information via a Packet System Information 3 Quater message on the Packet Broadcast Control Channel (PBCCH) , if it is present within the cell. If the PBCCH is not present the list information is transmitted via a System Information 2 Quater message on the Broadcast Control Channel (BCCH).

The test set transmits only the list of neighbour cells, it does not generate any of the FDD neighbour cell signals.


The 3G FDD Neighbours Table allows you to configure the UARFCN, Reporting Priority, Scrambling code, and Diversity for each 3G FDD Neighbour Cell.

The GPIB commands to configure the 3G FDD Neighbour Cell List are as follows:


3G FDD Neighbour Cell List


You can query the number of points in the specified cell list with the command CALL[:CELL]:UTRAN:FDDuplex:TABLe:POINts? .

Extended 3G FDD Neighbour Cell List


You can query the number of points in the specified cell list with the command CALL[:CELL]:UTRAN:FDDuplex:TABLe:EXTended:POINts? .

Settings to the 3G FDD neighbour cell parameters are stored, but not applied until the neighbour cell is enabled.

You can also control 3G FDD neighbour cell parameters via the test set's front panel. The following procedure explains how to access the menus that allow you to configure simulated 3G FDD Neighbour Cell parameters, when available. The Neighbour Cell menus are located in the Cell List menu.

  1. Press CALL SETUP .
  2. Press Cell Info ( F6 ).
  3. Press Cell Lists ( F4 ).-
  4. Press 3G FDD Neighbours ( F4 ).
  5. Use the knob to scroll to and highlight the Neighbour Cell you wish to configure.
  6. Press the knob. This displays the 3G FDD Neighbour Cell menu (similar to the figure below) that contains the configurable parameters for that Neighbour Cell.

    NOTE: You must enable the neighbour cell (set the State parameter to On), before you can access the other neighbour cell parameters.

  7. Use the knob to highlight the desired parameter. Rotate the knob or use the number keys to set the value for the parameter.

Configuring 3G Measurement Reports Parameters

The following table lists the configurable measurement parameters and their associated commands. See 3GPP TS 04.018 Version 8.23.0 and 3GPP TS 05.08 Version 8.16.0 for more details on the information elements defined in the table.

Parameter GPIB Command
3G Measurement Parameters Inclusion CALL[:CELL]:UTRAN[:ALL]:MPDescr

3G Search Priority


FDD GPRS Qoffset

FDD Measurement Parameters Inclusion CALL[:CELL]:UTRAN[:ALL]:MPDescr:FDDinfo
FDD Multi-RAT Reporting CALL[:CELL]:UTRAN[:ALL]:MPDescr:FDDinfo:MREPorting
FDD Reporting Quantity CALL[:CELL]:UTRAN[:ALL]:MPDescr:FDDinfo:RQUantity

FDD Reporting Offset

FDD Reporting Threshold


Qsearch_C_initial CALL[:CELL]:UTRAN[:ALL]:MPDescr:QSC:INITial



Qsearch P


The 3G measurement reports parameters can also be configured manually by doing the following steps:

  1. Press CALL SETUP .
  2. Press the left More key to advance the Control menu to ( 2 of 3 ).
  3. Press Measurement Reports ( F6 ).
  4. Press Configure ( F2 ).
  5. Press 3G Meas Parameters ( F2 )
  6. Use the knob to highlight the desired parameter. Rotate the knob or use the number keys to set the value for the parameter.

Operating Considerations

The 3G FDD neighbour cell settings are sent with the transmitted signal when the test set's Operating Mode is set to one of the following: GSM BCH, GPRS BCH, EGPRS BCH, GSM BCH+TCH, GPRS BCH+PDTCH, EGPRS BCH+PDTCH, or Active Cell with the Serving Cell set to GSM, GPRS, or EGPRS.

Related Topics

Measurement Reports