Question: In E-UTRAN, when an E-SMLC requests uplink positioning using SRS signals, what action can an eNodeB take if the requested resources are not available?
Option 1: The eNodeB must deny the request and notify the UE directly.
Option 2: The eNodeB can only assign alternative resources but must always allocate some resources.
Option 3: The E-SMLC will automatically select a different positioning method without eNodeB intervention.
Option 4: The eNodeB may assign other available resources (or no resources if none are available) and report the allocation to the E-SMLC.
Explanation: This is because, according to uplink positioning method support in E-UTRAN, if an E-SMLC requests resources for SRS signals for uplink positioning and those specific resources are not available, the eNodeB has flexibility to assign different resources (if any are free) or allocate no resources at all, then informing the E-SMLC about its decision regarding resource allocation.