Zte ZXG10 OB06, Technical Manual

Page: 69 / 117

Chapter 4 - System Functions
Confidential and Proprietary Information of ZTE CORPORATION 55
RESPONSE (NACK) message to the FURRM, and then the FURRM returns
an ERROR REPORT message, with the cause “Encryption algorithm cannot
be executed” for example.
If the (RR) CIPH MODE CMD message is considered wrong, the MS returns
a (RR) RR STATUS message with the cause “Protocol error unspecified”
and performs no operation after that.
Channel Release
1. SACCH deactivation
The procedure of SACCH deactivation is shown in Figure 40.
F
I G U R E
4 0 S A C C H D
E A C T I V A T I O N
MS LAPDm FURRM HPIMan LAPD
BSC OAMM
D m _DL_ DATA_
REQ
(CHAN REL)
DL _DATA_ IND (DATA
REQ(CHAN REL))
DATA REQ
( CHAN REL) (CHAN REL)
(DEACT SACCH)
DL _DATA_ IND (DEACT SACCH)
M PH_RRC m dTo
CHP (CHP
DEACT SAC CH)
The BSC releases the SACCH in the OB06 according to the (RR)
CHANNEL RELEASE procedure.
When the BSC sends the (RR) CHANNEL RELEASE, it sends the DEACT
SACCH message to the OB06, to command the OB06 to stop
transmitting downlink SACCH frame.
The FURRM module sends the related information in the DEACT SACCH
message to the CHP for processing.