Reference Manual

Table Of Contents
Frequency Hopping
Supported channel numbers are:
Bm + ACCH
Lm + ACCH
SDCCH/8 + ACCH
This function is initiated when a CHANNEL_ACTIVATION message /
GSM:08.58:8.4.1/ is received from the BSC.
The information element Channel Identication as dened in /
GSM:08.58:9.3.5/ is ignored.
The BPC must have already been congured for frequency hopping by
the BSC (OML link). All frequency hopping parameters are dened for
each BPC at conguration, and cannot be changed at channel activation.
Frequency hopping is performed according to /GSM: 05.02:6.2.3/.
Frequency hopping is not supported for the BPC carrying BCCH.
Other BPCs on the BCCH frequency can be frequency hopping when
baseband hopping is used. The following conguration parameters are
used for administration of frequency hopping, the parameters are used
in the frequency hopping algorithms as described in /GSM: 05.02:6.2.3/.
Table 118 Conguration parameters
Parameter Supported values Description
HSN /GSM: 05.02 6.2.2/ Hopping Sequence Number
0 = cyclic hopping 1-63 = random hopping
MAIO /GSM: 05.02:6.2.2/ Mobile Allocation Index Offset
Frequency list 1-64 elds Information element to provide a list of the
ARFCNs used in a frequency hopping sequence
25.4 Operational Conditions
Both baseband and synthesizer frequency hopping are supported. A
maximum of 64 frequencies can be used in the hopping sequence.
228 (421)
EN/LZT 720 0008 R1A
2001-06-26
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