6.1a MS conditions

3GPP45.005GSM/EDGE Radio transmission and receptionTS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

In order to assess the error rate performance that is described in this clause it is required for a mobile equipment to have a "loop back" facility by which the equipment transmits back the same information that it decoded, in the same mode. This facility is specified in 3GPP TS 44.014. In this clause power levels are given also in terms of field strength, assuming a 0 dBi gain antenna, to apply for the test of MS with integral antennas.

The requirements specified in this clause shall be met by a MS in CTS mode. In particular the requirement of subclause 6.6 on frequency hopping performance shall be met by a MS performing CTS frequency hopping (as specified in 3GPP TS 45.002 subclause 6.2).

The requirements for the receiver performance in non-static channels with 16QAM, 32QAM and QPSK modulations are specified for training sequence 6 (TSC-6, as defined in 3GPP TS 45.002).

In case of VAMOS mode, one of the VAMOS subchannels (see 3GPP TS 45.001) shall use training sequence 5 from TSC set 1 (and is referred to as VAMOS subchannel 1) and the other VAMOS subchannel shall use training sequence 5 from TSC set 2 (and is referred to as VAMOS subchannel 2). The requirements for the receiver performance for speech and control channels in VAMOS mode shall be met on VAMOS subchannel 1 and VAMOS subchannel 2 when the values of SCPIR_DL specified in tables 1s, 1t, 1u, 1x, 1y, 2aa, 2ab and 2ag are used for the AQPSK signal.

An EC-GSM-IoT MS only needs to support packet-switched service. Support of modulation- and coding schemes MCS-1 is mandatory for Coverage Class CC1 using one PDCH per TDMA frame and for Coverage Classes CC2, CC3 and CC4 using 4 consecutive PDCHs per TDMA frame (EC-PDTCH) as well as for Coverage Classes CC2, CC3, CC4 and CC5 using 2 consecutive PDCHs per TDMA frame (EC-PDTCH/2TS). Support of MCS-1 is mandatory for uplink Coverage Class CC5. Other GMSK modulation- and coding schemes, MCS-2, MCS-3 and MCS-4 shall be supported only in CC1. The support of 8-PSK modulation- and coding schemes is optional and restricted to CC1.
An EC-GSM-IoT MS shall fulfil the requirements in subclauses 5.1.2, 5.2.1 and 5.3.1, applying coding scheme MCS-1 and associated reference sensitivity performance, derived from table 1a.

For a MS indicating support for DLMC the following applies for the requirements specified in this subclause and in clause 5:

In case of a DLMC configuration, DLMC specific requirements apply, except

– whenever the maximum supported carrier frequency spacing only allows for a single carrier to be received in a given radio block period, see 3GPP TS 45.002.

– when fallback to single carrier reception is performed, see 3GPP TS 45.002. In case of inter-band reception, the requirements only apply for the carrier in the frequency band on which the fallback is performed

– when PTCCH/D is being received,

in which case the requirements not specific to DLMC apply.

In case of MS in DLMC configuration, the stated performance at each receive antenna port shall be achieved for any of the wanted input signals at the specified power level when receiving up to the supported maximum number of downlink carriers at equal power within the maximum supported DLMC carrier frequency spacing. The required receiver resources for the supported maximum number of downlink carriers (see 3GPP TS 24.008) shall be allocated and activated simultaneously, distributed over maximum supported DLMC frequency spacing during the complete test.

NOTE: When testing for compliance of DLMC specific performance requirements, the applied input signals may, when appropriate, be limited to two useful signals with equal power for requirements in subclause 5.1 and 5.2, and one useful signal for requirements in clause 6, unless otherwise stated.

For a MS supporting DLMC the signalled Maximum Bandwidth, see 3GPP TS 24.008, corresponds to a maximum supported DLMC carrier frequency spacing as shown in Table 6a-1.

Table 6a-1. Nominal maximum supported DLMC carrier frequency spacing.

Maximum DLMC Bandwidth (MHz)	5 MHz	10 MHz	15 MHz	20 MHz
Maximum supported DLMC carrier frequency spacing / Number of GSM channels	4.2 MHz/22	8.8 MHz/45	13.2 MHz/67	18 MHz /91

For a MS indicating support for DLMC, no separate requirements apply for inter-band reception unless otherwise stated.

For a MS indicating support for non-contiguous intra-band reception, requirements additionally apply at carrier spacings larger than the maximum supported DLMC carrier frequency spacing, with carrier frequency spacing in each of the two carrier groups separated by at most the maximum supported DLMC carrier frequency spacing.

NOTE: There are no requirements defined for EGPRS2-B for DLMC configuration.