9 Control parameters

05.083GPPRadio subsystem link controlTS

The parameters employed to control the radio links are shown in tables 1 and 2.

Table 1: Radio sub‑system link control parameters

Parameter name

Description

Range

Bits

Channel

BSIC

Base station Identification Code

0‑63

6

SCH D/L

BA

BCCH Allocation

BCCH D/L

BA_IND

Sequence number of BA

0/1

1

BCCH D/L

MS_TXPWR_MAX_CCH

The maximum TX power level an

0/31

5

BCCH D/L

MS may use when accessing the

system until otherwise

commanded.

POWER OFFSET

The power offset will be used in

0‑3

2

BCCH D/L

conjunction with the MS TXPWR MAX CCH parameter

by the class 3 DCS 1 800 MS:

0 = 0 dB

1 = 2 dB

2 = 4 dB

3 = 6 dB

RXLEV_ACCESS_MIN

Minimum received signal level at the MS

0‑63

6

BCCH D/L

required for access to the system.

RADIO_LINK_TIMEOUT

The maximum value of the radio

4

BCCH D/L

link counter 4‑64 SACCH blocks,

SACCH D/L

15 steps of 4 SACCH blocks

CELL_RESELECT_HYSTERESIS

RXLEV hysteresis for required

0‑7

3

BCCH D/L

cell re‑selection. 0‑14 dB, 2 dB

steps, i.e. 0 = 0 dB, 1 = 2 dB, etc.

NCC_PERMITTED

Bit map of NCCs for which the MS is permitted to report measurement results.
Bit map relates to NCC part of BSIC.

8

BCCH D/L
SACCH D/L

CELL_BAR_ACCESS

See table 1a.

0/1

1

BCCH D/L

CELL_BAR_QUALIFY

See table 1a

0/1

1

BCCH D/L

CELL_RESELECT_OFFSET

Applies an offset to the C2

0‑63

6

BCCH D/L

reselection criterion. 0 ‑ 126 dB,

2 dB steps, i.e. 0 = 0 dB, 1 = 2 dB, etc.

TEMPORARY_OFFSET

Applies a negative offset to C2 for

0‑7

3

BCCH D/L

the duration of PENALTY_TIME.

0 ‑ 60 dB, 10 dB steps i.e. 0 = 0 dB,.

1 = 10 dB, etc. and 7 = infinity

PENALTY_TIME

Gives the duration for which the

0‑31

5

BCCH D/L

temporary offset is applied.

20 to 620 s, 20 s steps, i.e.

0 = 20 s, 1 = 40 s, etc.

31 is reserved to indicate that

CELL_RESELECT_OFFSET is

subtracted from C2 and

TEMPORARY_OFFSET is ignored.

LSA_OFFSET

Applies an offset to be used for LSA cell re- selection between cells with the same LSA priorities.

0 = 0 dB, 1 = 4 dB, 2 = 8 dB, 3 = 16 dB,

4 = 24 dB, 5 = 32 dB, 6 = 48 dB, 7 =64 dB

0-7

3

BCCH D/L

PRIO_THR

The PRIO signal strength threshold is related to RXLEV_ACCESS_MIN.

0 = 0 dB, 1 = 6 dB, 2 = 12 dB, 3 = 18 dB

4 = 24 dB, 5 = 30 dB, 6 = 36 dB, 7 =  dB

0-7

3

BCCH D/L

LSA ID

The LSA identities for the cell

BCCH D/L

Qsearch_I

Search for 3G cells if signal level is below (0‑7) or above (8‑15) threshold
0 = – 98 dBm, 1 = – 94 dBm, … ,
6 = – 74 dBm, 7 =  (always)
8 = – 78 dBm, 9 = – 74 dBm, … ,
14 = – 54 dBm, 15 =  (never).
Default value =  (never).

0-15

4

BCCH D/L

Qsearch_C_Initial

Indicates the Qsearch value to be used in connected mode before Qsearch_C is received,
0 = use Qsearch_I, 1 =  (always).
Default value = use Qsearch_I.

0/1

1

BCCH D/L

XXX_Qoffset

Applies an offset to RLA_C for cell re‑selection to access technology/mode XXX (one or more)
0 = –  (always select a cell if acceptable),
1 = -28 dB, 2 = -24 dB, … , 15 = 28 dB.
Default value = 0 dB.

0-15

4

BCCH D/L

FDD_Qmin

A minimum threshold for Ec/No for UTRAN FDD cell re-selection,
0= -20dB, 1= -6dB, 2= -18dB, 3= -8dB, 4= -16dB, 5= -10dB, 6= -14dB, 7= -12dB.

Default value= -12dB.

0-7

3

BCCH D/L

Table 1a: Parameters affecting cell priority for cell selection

CELL_BAR QUALIFY

CELL_BAR ACCESS

Cell selection priority

Status for cell reselection

0

0

normal

normal

0

1

barred

barred

1

0

low

normal (see note 2)

1

1

low

normal (see note 2)

If all the following conditions are met, then the "Cell selection priority" and the "Status for cell reselection" shall be set to normal:

‑ the cell belongs to the MS HPLMN;
‑ the MS is in cell test operation mode;
‑ the CELL_BAR_ACCESS is set to "1";
‑ the CELL_BAR_QUALIFY is set to "0";
‑ the Access Control class 15 is barred.

NOTE 1: A low priority cell is only selected if there are no suitable cells of normal priority (see 3GPP TS 03.22).

NOTE 2: Two identical semantics are used for cross phase compatibility reasons. This allows an operator to declare a cell always as a low priority one for a phase 2 MS, but keeps the opportunity for an operator to decide whether a phase 1 MS is permitted to camp on such a cell or not.

Table 2: Handover and power control parameters ‑ slow ACCH

Parameter name

Description

Range

Bits

Message

MS_TXPWR_REQUEST

The power level to be used by an

0‑31

5

L1 header

(ordered MS power level)

MS

downlink

MS_TXPWR_CONF.

Indication of the power

0‑31

5

L1 header

(actual MS power level)

level in use by the MS.

uplink

POWER_LEVEL

The power level to be used by an

0‑31

5

HO/assignment

MS on the indicated channel

command

RXLEV_FULL_SERVING_CELL

The RXLEV in the current

0‑63

6

Measurement

serving cell accessed over

results

all TDMA frames

RXLEV_SUB_SERVING_CELL

The RXLEV in the current

0‑63

6

Measurement

serving cell accessed over

results

a subset of TDMA frames

RXQUAL_FULL_SERVING_CELL

The RXQUAL in the current

0‑7

3

Measurement

serving cell, assessed over

results

all TDMA frames.

RXQUAL_SUB_SERVING_CELL

The RXQUAL in the current

0‑7

3

Measurement

serving a cell, assessed over

results

subset of TDMA frames.

DTX_USED

Indicates whether or not the MS

1

Measurement

used DTX during the previous

results

measurement period.

BA_USED

Value of BA_IND for

0/1

1

Measurement

BCCH allocation used

results

RXLEV_NCELL_(1‑6)

The RXLEV assessed on BCCH

0‑63

6

Measurement

carrier as indicated

results

in the BCCH Allocation

BCCH_FREQ_NCELL_(1‑6)

The BCCH carrier RF channel

0‑31

5

Measurement

number in NCELL.

results

BSIC_NCELL_(1‑6)

Base station identification

0‑63

6

Measurement

code for NCELL.

results

MULTIBAND_REPORTING

Indication of the number of cells to be reported for each band in multiband operation.

0‑3

2

BCCH D/L
SACCH D/L

SCALE

Indication of the offset, which applies for the reported RXLEV values.

0 = 0 dB, 1 = +10 dB

0-1

1

Enhanced Measurement Report

SCALE_ORD

Indication of the offset, which shall be used for the reported RXLEV values.

0 = +0 dB, 1 = + 10 dB, 2 = automatic

Default value = 0 dB.

0-2

2

SACCH D/L

Qsearch_C

Search for 3G cells if signal level below threshold (0-7):
– 98, – 94, … , – 74 dBm,  (always)
or above threshold (8-15):
– 78, – 74, … , – 54 dBm,  (never)

0-15

4

SACCH D/L

REPORT_TYPE

Indicates which report type the MS shall use,
0 = enhanced, 1 = normal

Default value = normal

0/1

1

BCCH D/L

SACCH D/L

XXX_MULTIRAT_REPORTING

The number of cells from the access technology/mode XXX (one or more) that shall be included in the list of strongest cells or in the measurement report.

0-3

2

BCCH D/L
SACCH D/L

SERVING_BAND_REPORTING

The number of cells from the GSM serving frequency band that shall be included in the list of strongest cells or in the measurement report.

Default value = 3

0-3

2

BCCH D/L
SACCH D/L

REP_PRIORITY

Indicates the reporting priority per cell,
0 = normal, 1 = high

Default value = normal

0/1

1

SACCH D/L

REPORTING_RATE

Indicates the allowed reporting rate,
0 = normal, 1 = reduced
Default value = normal.

0/1

1

SACCH D/L

INVALID_BSIC_REPORTING

Indicates if GSM cells with invalid BSIC and allowed NCC part may be reported,

0 = no, 1 = yes
Default value = no.

0/1

1

SACCH D/L

XXX_REPORTING_THRESHOLD

Apply priority reporting if the reported value is above threshold for GSM frequency band or access technology/mode XXX (one or more),
0, 6, … , 36,  (never).

Default value = always.

0-7

3

SACCH D/L

XXX_REPORTING_OFFSET

Apply an offset to the reported value when prioritising the cells for reporting for GSM frequency band or access technology/mode XXX (one or more),
0, 6, … , 42 dB.
Default value = 0 dB.

0-7

3

SACCH D/L

FDD_REP_QUANT

Indicates the reporting quantity for UTRAN FDD cells,
0 = RSCP, 1 = Ec/No

0/1

1

BCCH D/L
SACCH D/L

3G_SEARCH_PRIO

Indicates if 3G cells may be searched when BSIC decoding is required,
0 = no, 1 = yes

Default value = yes

0/1

1

SACCH D/L

RTD

The real time difference to other GSM cells, modulo 51 TDMA frames,
step: 1 or 1/64 TDMA frame

0-50
or
0-3263

6
or
12

SACCH D/L

NOTE 1: RXLEV and RXQUAL fields are coded as described in clause 8.

NOTE 2: BCCH_FREQ_NCELL_(1‑6) is coded in accordance with 3GPP TS 04.18 as the position in the list of BA carriers.

NOTE 3: For the details of the Measurement Result message see 3GPP TS 04.18.