User`s guide
Agilent PXT Wireless Communications Test Set
User’s Guide
164
Table 5-2: LTE to LTE Handovers (Continued)
Handover
Description
Requirements
Intra-frequency
Reselection
Example:
Testing Two Cells
Using One PXT
- UE chooses to move from Cell (ID=X) to a new
Cell (ID=Y) due to a monitored threshold no
longer being met within the current Cell
connection, or UE has lost sync with current
Cell.
- EARFCN stays the same.
1 PXT + Option BB1* or
2 PXTs
Inter-frequency
Reselection
Example:
PXT to PXT
Handover
- UE chooses to move from one EARFCN to a
different EARFCN within the same LTE Band due
to a monitored threshold no longer being met
within the current Cell connection, or UE has
lost sync with current Cell.
- Cell ID of the two PXTs are set to two different
values to emulate two different Cells
- EARFCN may be in a different Band
2 PXTs (BB1* is not
required)
Blind
(Redirection)
Example:
Blind Handover
Configured as a single cell, the PXT explicitly forces
the UE to handover to a new EARFCN (Band must
not change) and/or Cell ID. Immediately after the
handover request is sent, the PXT quickly retunes its
TX/RX to the new EARFCN and/or reconfigures its
Cell ID. This type of handover is typically used for RF
test purposes, for example: to sweep the EARFCN
across the Band.
NOTE: Depending upon UE capability, the forced
redirection may fail and the UE then performs a
reselection procedure to re-establish the connection
on the new EARFCN and/or Cell ID. One reason for
the redirection HO failure may be due to the UE only
supporting inter-frequency EARFCNs explicitly
defined in SIB5 of the scenario file.
NOTE: Unlike Option BB1 involving two cell
emulation, the Blind handover does not support cell
reselection based upon monitored threshold
conditions defined in SIB4.
1 PXT – (BB1* is not
required)
*Option BB1 is Enhanced Baseband Processing. It enables two full cells within one PXT and enables you to make
handovers using one PXT emulating two cells, providing they are both operating on the same EARFCN.
Some UEs may need to perform a measurement report before handovers can
be accomplished successfully.