NPRS (NB-IoT)

The Narrowband Positioning Reference Signal (NPRS) is used for downlink Observed Time Difference of Arrival (OTDOA) based positioning accuracy.

NPRS Active - NPRS Active enables or disables the group of NPRS-related parameters.

Default: Disabled

Choices: Disabled, Enabled

NPRS ID - When NPRS Active is selected (enabled), sets the narrowband positioning reference signal identity (NPRS ID).

Default: 1

Range: 0 to 4095

NPRS Bitmap - When NPRS Active is selected (enabled), sets the NPRS subframe Part A configuration. NPRS Bitmap length is the same as Downlink Bitmap Length. The first/leftmost bit corresponds to subframe #0 of the radio frame satisfying SFN System Frame Number mod x = 0, where x is the size of the bit string divided by 10.

Value 0 in this bitmap indicates that corresponding subframe does not contain an NPRS.

Value 1 in this bitmap indicates that corresponding subframe does not contain an NPRS.

See 3GPP TS Technical Specification 36.211 10.2.6A and 36.355 6.5.1.2 for more information.

Default: Enabled; 1,1,1,1,1,1,1,1,1,1

Sequence Info - Sequence Info is available when Operation Mode is In-Band (same PCI) or In-Band (different PCI) and NPRS Active is selected (enabled). Sequence Info specifies the index of the PRB containing the NPRS as defined in the 3GPP TS 36.355 6.5.1.2 table nprsSequenceInfo to E UTRA UMTS Terrestrial Radio Access: A W-CDMA standard developed ETSI, ARIB and the TIA. This system uses DSSS and either FDD or TDD depending on its frequency assignment and application. PRB index relation. When Auto is selected (enabled), Sequence Info is grayed out and the NB-IoT demodulator tries to autodetect the correct Sequence Info index value.

Default: 0

Range: 0-174

Auto - Sequence Info is available when Operation Mode is In-Band (same PCI) or In-Band (different PCI) and NPRS Active is selected (enabled). When Auto is selected (enabled), the NB-IoT demodulator tries to autodetect the correct Sequence Info index value.

Default: Enabled