ZTE Corporation ZXG-OB06 Manuale Utente

ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual

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7. Um L3 message transparent forwarding procedure in non-

acknowledgement-mode: This procedure allows the BSC to request the
OB06 to transparently forward a Um interface L3 message in the non-

acknowledgement mode.

Um L3 message transparent receiving procedure in non-
acknowledgement mode: This procedure allows the OB06 to give the

BSC an indication that a Um interface L3 message is received
transparently in the non-acknowledgement mode.

9. Link error indication procedure: This procedure allows the OB06 to give

the BSC an indication about the abnormity of a radio link layer.

Link Establishment

The procedure of the link establishment originated by MS is shown in

Figure 23.

I G U R E

2 3

M S - O

R I G I N A T E D

I N K

S T A B L I S H M E N T

LAPDm

FURRM

HPIMan

LAPD

BSC

OAMM

D m_DL_EST_IND

DL_DATA_REQ (EST IND)

DL_DATA_IND

(EST IND)

(SABM)

Set Timer

MPH_CHPIndToRR

(CHP

SYNCHRONIZED)

DL_DATA_REQ(CONN FAIL IND )

(CONN FAIL IND)

kill Timer

The OB06 gives the BSC an indication that one multi-frame-mode L2 link
has been established on the wireless path.

During the paging, the GSM04.08 message PAGING RESPONSE will be
contained in DL_EST_IND and sent to the FURRM module.

After the FURRM module sends the EST IND message, if the current
channel is the TCH activated in the service mode, the synchronization

timer will be enabled to wait for the synchronization between CHP and TC.
If the synchronization is not implemented till the timer expires, the FURRM

sends the CONN FAIL IND message to the BSC, to wait for the BSC to
release the channel where the conversation cannot be established
normally.