name: UDRE
full_form: User Differential Range Error
context: The UTRAN Location System Operations Function (U-LSOF) is responsible for provisioning of data, positioning capabilities, data related to clients and subscription (LCS client data and UE data), fault management and performance management of LCS within the RNC. An LSOF may be associated with each entity. The LSOF interacts with Internal (OAM) Clients for administration and maintenance of the data. The Iur interface may pass messages relating to changes or reporting of the data associated with the LSOF in the RNC. The Iub interface may pass messages relating to changes or reporting of the data associated with the LSOF in the Node B or the LMU. The Uu interface may pass messages relating to changes or reporting of the data associated with the LSOF in the UE or the remote LMU. When the SAS is present, with either RNC or SAS centric mode, the U-LSOF may be split across SAS and SRNC.
description: The User Differential Range Error (UDRE) is a parameter that provides an estimate of the uncertainty in the corrections for a particular satellite. It is used by the UE to determine the accuracy of the pseudorange measurements and is multiplied by the UDRE Scale Factor to obtain the final UDRE estimate.
explanation: The context describes UDRE as a field within a message that contains differential corrections, which provides an estimate of uncertainty in these corrections. This indicates that UDRE is a specific value or parameter used in calculations related to satellite positioning and pseudorange measurements.
section_title: 10.5.1.2	DGPS corrections
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