Ericsson RBS 2106 Reference Manual page 260

Call Control
Physical_Information message to MS and the Handover_Detection
message to BSC. /GSM 08.58:4.3/
MS
Figure 122
There are some criterias that have to be fulfilled if the Handover Access
messages shall be accepted.
Acceptance of a Handover_Access message is based on:
•
•
To accept the MS handover access, RBS shall receive:
•
•
The TA difference between acceptable Access Bursts must be less than
or equal to 4 bit periods.
On acceptance of the MS handover access, the RBS takes the following
actions:
•
•
•
If no correct frame is received from the MS, transmission of Physical
information shall be repeated.
258 (485)
HANDO ACCESS
PHY INFO
Physical information message
Handover Reference (received in handover message), which shall
match the value received in the related Channel Activation from
BSC
Measured Access Delay, which must not exceed 63 (≥64 not
accepted)
Two out of three acceptable Handover_Access messages (ABs)
for channel combination (i)
Two out of four acceptable Handover access messages (ABs) for
channel combination (v) and (vii)
Opens all logical channels for transceiving on the air (start
Normal Burst reception) and starts active channel measurements
on the dedicated resource.
Sends Handover detection to BSC /GSM 08.58:8.4.7/ including
the measured access delay value.
Sends a Physical information message to the MS /
GSM 04.08:3.4.4.2.2/. The Physical information shall be repeated.
© Ericsson Radio Systems AB
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RBS
HANDO DET
BSC
P003012A
EN/LZT 720 0008 P2A
2001-11-28