Westermo GDW-11 - Manual (Page 365)

Information about BCCH channel list
This is an extract from GSM 11.14
Byte(s) Description Length
1 BCCH channel list tag 1
2 Length (X) of bytes following 1
3 to X+2 BCCH channel list X
BCCH channel list
Contents: the list of absolute RF channels for BCCH carriers, as known by the ME from
the SYSTEM INFORMATION messages. The BCCH channel list is composed of one to
three BCCH channel sub lists, each sub list is derived from the set of frequencies defined
by reference neighbor cells description information element or elements. In the latter
case the set is the union of the different subsets defined by the neighbor cells description
information elements. The length of the BCCH channel list field depends on the length
of the received BCCH channel list derived from the different SYSTEM INFORMATION
messages to be considered.
Coding: Each ARFCN (Absolute Radio Frequency Channel Number) is represented by 10
bits. Spare bit(s) are to be filled with 0.
Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Byte 1 ARFCN#1 (high part)
Byte 2 ARFCN#1 (low part) ARFCN#2 (high part)
Byte 3 ARFCN#2 (low part) ARFCN#3 (high part)
... ...
Byte X-1 ARFCN#m-1 (low part) ARFCN#m (high part)
Byte X ARFCN#m (low part) Spare bit Spare bit
(0) (0)
SIM applications should take into account that early implementations of SIM application
toolkit may have coded this field differently, because of an inconsistency between the
content and the coding of this element in previous versions of 11.14. The SIM is able
to identify MEs that are using the coding described above by evaluating t“he indication
"BCCH Chann”el List coding" in the TERMINAL PROFILE command.
Structure of TERMINAL PROFILE 365 6615-2220