## 26.18 Dynamic ARFCN mapping tests

3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS

### 26.18.1 Control of dynamic ARFCN mapping with SI14 and SI15

26.18.1.1 Conformance Requirement

The dynamic mapping of ARFCN to carrier frequencies is specified as follow in 3GPP TS 45.005:

“The carrier frequency is designated by the absolute radio frequency channel number (ARFCN). If we call Fl(n) the frequency value of the carrier ARFCN n in the lower band, and Fu(n) the corresponding frequency value in the upper band, we have for the dynamically mapped ARFCNs:

 T-GSM 380 Fl(n) = 380.2 + 0.2*(n-x+y) x  n  x+z Fu(n)=Fl(n) + 10 T-GSM 410 Fl(n) = 410.2 + 0.2*(n-x+y) x  n  x+z Fu(n)=Fl(n) + 10 T-GSM 810 Fl(n) = 806.2 + 0.2*(n-x+y) x  n  x+z Fu(n)=Fl(n) + 45 GSM 710 Fl(n) = 698.2 + 0.2*(n-x+y) x  n  x+z Fu(n) = Fl(n) + 30 GSM 750 Fl(n) = 747.2 + 0.2*(n-x+y) x  n  x+z Fu(n) = Fl(n) + 30 DCS 1 800 Fl(n) = 1710.2 + 0.2*(n-x+y) x  n  x+z Fu(n) = Fl(n) + 95 PCS 1 900 FI(n) = 1850.2 + 0.2*(n-x+y) x  n  x+z Fu(n) = FI(n) + 80

where the applicable band is indicated by the GSM_Band parameter, x = ARFCN_FIRST, y = BAND_OFFSET and z = ARFCN_RANGE (See 3GPP TS 44.018). Parameters defining carrier frequencies not belonging to the indicated band shall not be considered erroneous.

Information about dynamic mapping is provided by System Information type 15 or Packet System Information type 8 if PBCCH exists, and optionally by System Information type 14. Dynamic ARFCN mapping shall be valid for the whole PLMN. Dynamic mapping has priority over the fixed designation of carrier frequencies. The support of dynamic ARFCN mapping is optional for all other mobile stations except those supporting GSM 700 and T-GSM.”

The frequency band for T-GSM and GSM 700 (dynamic ARFCN mapping is mandatory for these frequencies bands as there is no physical mapping specified) are defined as follow in 3GPP TS 45.005:

i) T-GSM 380 band:

– for T-GSM 380, the system is required to operate in the following band:

– 380,2 MHz to 389,8 MHz: mobile transmit, base receive;

– 390,2 MHz to 399,8 MHz base transmit, mobile receive.

ii) T-GSM 410 band:

– for T-GSM 410, the system is required to operate in the following band:

– 410,2 MHz to 419,8 MHz: mobile transmit, base receive;

– 420,2 MHz to 429,8 MHz base transmit, mobile receive.

v) GSM 710 Band:

– for GSM 710, the system is required to operate in the following band:

– 698 MHz to 716 MHz: base transmit, mobile receive;

– 728 MHz to 746 MHz: mobile transmit, base receive.

vi) GSM 750 Band:

– for GSM 750, the system is required to operate in the following band:

– 747 MHz to 762 MHz: base transmit, mobile receive;

– 777 MHz to 792 MHz: mobile transmit, base receive.

vii) T-GSM 810 Band:

– for T-GSM 810, the system is required to operate in the following band:

– 806 MHz to 821 MHz: mobile transmit, base receive;

– 851 MHz to 866 MHz: base transmit, mobile receive.

The way to change dynamic ARFCN mapping is specified as follow in 3GPP TS 44.018:

“SYSTEM INFORMATION TYPE 15 message is broadcast if dynamic ARFCN mapping is used in the PLMN. In this case ARFCN values are allocated and dynamically mapped to physical frequencies, see 3GPP TS 45.005. The presence of dynamic ARFCN mapping shall be indicated in Cell Options (BCCH) IE. When the value of the parameter DM_CHANGE_MARK is changed in the SYSTEM INFORMATION TYPE 15 message, the mobile station shall re-read information on dynamic mapping in a full set of SYSTEM INFORMATION 15 messages.

After the release of a dedicated connection, when returning to idle mode or packet idle mode, the mobile station may keep the dynamic ARFCN mapping information for the PLMN of the chosen cell under the following conditions:

– there has not been any handover during the connection; or

– the mobile station chooses the last cell (identified by the BCCH carrier and BSIC) that was used during the connection and there has not been any handover including dynamic ARFCN mapping information after reception of the dynamic ARFCN mapping information.

Otherwise, the mobile station shall acquire new dynamic ARFCN mapping information.”

References:

3GPP TS 45.005, subclause 2.

3GPP TS 44.018, subclauses 3.2.2.1, 9.1.43i, 9.1.43j, 10.5.2.3, 10.5.2.11b, 10.5.2.37j, 10.5.2.37k.

26.18.1.2 Test Purpose

To verify that for the frequencies bands for which Dynamic ARFCN mapping is mandatory, the MS:

1) detects that dynamic ARFCN mapping is supported in the cell (signalled via the DN-IND field of the Cell Options (BCCH) IE in the SI3)

2) decodes and interprets correctly the parameters x = ARFCN_FIRST, y = BAND_OFFSET and z = ARFCN_RANGE transmitted in the SI15 message broadcast on the BCCH.

3) decodes and interprets correctly the parameters x = ARFCN_FIRST, y = BAND_OFFSET and z = ARFCN_RANGE transmitted in the SI14 message broadcast on the SACCH.

4) detects a change of dynamic ARFCN mapping in the SI15 message broadcast on the BCCH (signalled via the DM_CHANGE_MARK field in SI15)

26.18.1.3 Method of Test

Initial Conditions

MS:

Switched off

MS operating in a band for which support of Dynamic ARFCN mapping is mandatory.

System Simulator:

1 cell, default setting for the frequency band to be tested.

Cell Options (BCCH) IE shall indicate that Dynamic ARFCN is supported

Specific PICS statements:

PIXIT statements:

Test Procedure

Two dynamic ARFCN mapping of the carrier frequencies of the band to be tested are defined (the two mappings shall not overlap):

a) the first mapping referred as DM1 maps the N carrier frequencies of the band to be tested to the ARFCNs 438 to 438 + N.

b) the second mapping referred as DM2 maps N – 1 carrier frequencies (the first frequency is excluded) of the band to be tested to the ARFCNs 438 + N +1 to 438 + N + N

The parameters of the SI14/SI15 rest octets corresponding to these mapping are defined in the following table:

 SI14/SI15 rest octets parameters DM1 mapping DM2 mapping GSM_Band GSM T 380 or GSM T 410 or GSM T 810 or GSM 710 GSM T 380 or GSM T 410 or GSM T 810 or GSM 710 ARFCN_FIRST 438 438 + N ARFCN_OFFSET 0 1 ARFCN_RANGE N N – 1

With:

N = 47 for T-GSM 380,

N = 47 for T-GSM 410,

N = 89 for GSM 710,

N = 74 for GSM 750,

N = 74 for T-GSM 810.

The default layer 3 messages of the section 26.6.19 shall be used but when the DM2 mapping is used, the ARFCN numbers shall be modified by adding N.

The test is done in 3 steps:

1) Checking that the MS takes into account the ARFCN mapping defined in SI15

The SS broadcasts on the BCCH the default SIs and the SI15 containing the DM1 parameters. The MS is switched on. The MS shall trigger a IMSI Attach procedure. The SS assigns a SDCCH channel according to the dynamic ARFCN mapping defined in DM1. It is checked that the MS uses the frequency assigned in the IMMEDIATE ASSIGNMENT message. Before releasing the SDCCH channel, the SS sends to the MS on the SACCH the SI14 containing the DM2 parameters.

2) Checking that the MS takes into account the ARFCN mapping defined in SI14

When the channel has been released and before the MS receives on the BCCH the SI14 containing the DM2 parameters, the SS establishes a SDCCH by assigning a channel according to the dynamic ARFCN mapping defined in DM2. It is checked that the MS uses the frequency assigned in the IMMEDIATE ASSIGNMENT message.

3) Checking that the MS takes into account a change of dynamic ARFCN mapping in SI15

When the channel has been released by the MS the SS broadcasts on the BCCH the SI15 containing the DM2 parameters and then the DM1 parameters. The SS establishes a SDCCH by assigning a channel according to the dynamic ARFCN mapping defined in DM1. It is checked that the MS uses the frequency assigned in the IMMEDIATE ASSIGNMENT message.

Maximum Duration of Test

1 minutes

Expected Sequence