Function Change
At switch-over to the new software, traffic is affected. This implies a
restart as in chapter Restart and Recovery followed by configuration and
enabling as specified in chapter Functionality Administration.
At start-up (in START_CF_CMD), negotiation will take place between
BTS and BSC. The BTS sends a NEGOTIATION REQUEST message
to the BSC including a list of valid IWDs supported by the BTS. A set
of IWDs is chosen by the BSC in NEGOTIATION REQUEST ACK
message and is sent to the BTS which adapts to the selected IWDs. This
backward compability function introduces the possibility to connect a
BTS (R8) to a BSC (R7). It is also possible to run a BSC (R8) with a
BTS (R7), and with BTS (R8) in either R7 mode or R8 mode.
A BSC (R7) will answer with a reject message,
NEGOTIATION_REQUEST_NAK, to the NEGOTIATION_REQUEST
message as it is not supported by BSC (R7). The BTS will then adapt
to IWDs according to BSC (R7) when a
NEGOTIATION_REQUEST_NAK message is received.
42.3
Operational Conditions
42.3.1
Operation and Maintenance
The visual indicators relevant to Function Change are described in
chapter Operation and Maintenance Terminal.
42.3.2
Capabilities
The download of software via the A-bis to the RBS and internal transfer
of software files does not affect the normal operation of the RBS.
Switch-over, that is, software start of an RBS, takes less than 60
seconds.
The switch-over time is defined as the time elapsed from the reception
of a start command via A-bis to when the Main RU is ready for
re-establishment of the link to the BSC.
338 (485)
EN/LZT 720 0008
P2A
2001-11-28
© Ericsson Radio Systems AB
— All Rights Reserved —
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Summary of Contents for RBS 2106
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