Zte ZXG10-OB06, Техническое руководство

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ZXG10-OB06 (V1.0) Integrated Outdoor GSM Base Station Technical Manual
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• Physical channel establish procedure indication
• Handover reference
• Time lead (optional)
• Encryption mode setting (optional)
It also controls the connection of MS if it is required to connect in
synchronous activation mode.
In synchronous handover, when MS is to connect on the allocated
channel, it sends four (RR) HANDOVER ACESS messages on active
SACCH in one access burst. This message contains the handover
reference-information unit. OB06 immediately start sending these
messages on the active channel in specified mode with the encryption,
if required.
OB06 start sending on SACCH, using MS power or MS power with time
advance.
When OB06 receives one access burst with correct handover reference
or one correct decoding frame, it starts the normal receiving procedure
on the SACCH and the active channel. It also starts the handover
detection procedure that is sent to BSC. The measured access burst
delay is contained in the HANDO DET message.
In asynchronous handover, when MS is connected to the allocated
channel, the first half procedure is the same as in synchronous
handover (see above). After sending HANDO DET message, OB06
sends the (RR) PHY INFO message to MS in non-acknowledgment
mode on the active signaling channel. At the same time, it starts timer
T3105. If T3105 expires before receiving a correct decoding frame,
OB06 resends the message. If no correct decoding frame is received
after sending the message for Ny1 times, OB06 sends CONNECTION
FAILURE message to BSC, with the reason ‘Handover access failed’. On
reception of this message, BSC disconnects the new channel. At this
stage, the RR session-release procedure begins: The channel release
and link release.
In pseudo-synchronous cell, the procedure is same as that in
synchronous cell. When the connection establishes, the MS returns
transparent (RR) HANDOVER COMPLETE message on the active SACCH.
If the connection fails, the MS returns HANDOVER FAILURE message.
On receiving the message, network side disconnects the new channel
and starts the RR session release procedure.
The parameters T3105 and Ny1 are sent by OAMM module to the
FURRM during the system initialization.
Similar to the link establishment procedure, when a TCH channel is set
up in the service mode, it waits for a synchronization message.