Call Control
Physical_Information message to MS and the Handover_Detection
message to BSC. /GSM 08.58:4.3/
P003012A
HANDO ACCESS
PHY INFO
RBS
BSC
HANDO DET
MS
Figure 122
Physical information message
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:
•
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)
To accept the MS handover access, RBS shall receive:
•
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)
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:
•
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.
If no correct frame is received from the MS, transmission of Physical
information shall be repeated.
258 (485)
EN/LZT 720 0008
P2A
2001-11-28
© Ericsson Radio Systems AB
— All Rights Reserved —
P
re
li
m
in
a
ry
Summary of Contents for RBS 2106
Page 2: ...P r e l i m i n a r y ...
