14.18.1d Minimum Input level for Reference Performance in for EC-GSM-IoT Configuration

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

14.18.1d.1 Definition

The minimum input level is the signal level at the MS receiver input at which a certain BLER is met.

14.18.1d.2 Conformance requirement

1. The block error rate (BLER) performance for Extended Coverage Packet Data Traffic Channels Downlink
(EC-PDTCH/D) shall not exceed 20 % at input levels according to the table 14.18.1d-1.

Table 14.18.1d-1: Input signal level (for EC-GSM-IoT MS) at reference performance for GMSK modulated signals for different Coverage Classes (CC)

E-GSM 900 and GSM 850

Type of

Propagation conditions

Channel

Static

TU1.2

(no FH)

TU1.21)

(ideal FH)

TU50
(no FH)

EC-SCH

dBm

-124.5

-121.5

-123.0

EC-BCCH

dBm

-123.5

-119.5

-121.5

EC-PACCH/D

CC1

dBm

-114.5

-106.5

-110.0

-109.0

EC-PACCH/D/4

CC2

dBm

-120.5

-112.5

-116.0

-115.0

EC-PACCH/D/8

CC3

dBm

-123.5

-115.0

-120.5

-119.5

EC-PACCH/D/16

CC4

dBm

-126.0

-118.0

-124.0

-123.0

EC-CCCH/D2)

CC1

dBm

-111.0

-103.0

-103.5

EC-CCCH/D/8

CC2

dBm

-119.5

-114.5

-116.5

EC-CCCH/D/16

CC3

dBm

-122.0

-117.0

-120.0

EC-CCCH/D/32

CC4

dBm

-124.0

-120.5

-122.5

EC-PDTCH/MCS-14)

CC1

dBm

-112.0

-106.5

-108.5

-108.0

EC-PDTCH/MCS-1/4

CC2

dBm

-118.0

-112.5

-114.5

-114.0

EC-PDTCH/MCS-1/8

CC3

dBm

-121.0

-115.5

-118.0

-117.5

EC-PDTCH/MCS-1/16

CC4

dBm

-124.0

-118.5

-122.0

-121.5

DCS 1800 and PCS 1900

Type of

Propagation conditions

channel

Static

TU1.2

(no FH)

TU1.21)

(ideal FH)

TU50
(no FH)

EC-SCH

dBm

-124.5

-122.0

-123.0

EC-BCCH

dBm

-123.5

-120.0

-121.5

EC-PACCH/D

CC1

dBm

-114.5

-106.5

-109.5

-109.5

EC-PACCH/D/4

CC2

dBm

-120.5

-112.0

-116.0

-115.5

EC-PACCH/D/8

CC3

dBm

-123.5

-115.5

-120.5

-120.0

EC-PACCH/D/16

CC4

dBm

-126.0

-118.5

-124.0

-123.5

EC-CCCH/D2)

CC1

dBm

-111.0

-103.5

-104.0

EC-CCCH/D/8

CC2

dBm

-119.5

-114.5

-117.0

EC-CCCH/D/16

CC3

dBm

-122.0

-117.5

-120.0

EC-CCCH/D/32

CC4

dBm

-124.0

-121.0

-122.5

EC-PDTCH/MCS-14)

CC1

dBm

-112.0

-106.5

-108.5

-108.5

EC-PDTCH/MCS-1/4

CC2

dBm

-118.0

-112.5

-114.5

-114.0

EC-PDTCH/MCS-1/8

CC3

dBm

-121.0

-115.5

-118.0

-118.0

EC-PDTCH/MCS-1/16

CC4

dBm

-124.0

-118.5

-122.0

-121.5

NOTE 1: Ideal FH case assumes perfect decorrelation between bursts. This case may only be tested if such a decorrelation is ensured in the test

NOTE 2: The performance requirements for EC-CCCH apply for EC-PCH and EC‑AGCH.

NOTE 3: For the notation of EC-channels, see 3GPP TS 45.003.

NOTE 4: For MCS-2, MCS-3 and MCS-4 in CC1 the requirements in table 1a apply for Static and TU50 (no FH) and TU50 (ideal FH) propagation conditions

The input levels given in the above Table are applicable to GSM 400, GSM 700, GSM 850, GSM 900 and PCS 1 900 MS, and have to be corrected by the following values for the following classes of MS:

GSM 850, GSM 900 small MS +2 dB;

DCS 1800 class 1 or 2 MS +2/+4 dB**;

DCS 1800 class 3 MS +2 dB;

PCS 1 900 class 1 or 2 MS +2 dB.

** For all DCS 1 800 class 1 and class 2 MS, a correction offset of +2dB shall apply for the reference sensitivity performance as specified in table 1a for the normal conditions defined in Annex D and an offset of +4 dB shall be used to determine all other MS performances.

3GPP TS 45.005, table 1aa; 3GPP TS 45.005, subclause 6.2.

2. The BLER shall not exceed the conformance requirements given in 1. and 2. under extreme conditions; 3GPP TS 45.005, subclause 6.2 and annex D subclauses D.2.1 and D.2.2.

3. The reference sensitivity performance specified above need not be met in the following cases:

For MS at the static channel, if the received level on either of the two adjacent timeslots to the wanted exceed the wanted timeslot by more than 20 dB.

For MS on a multislot configuration, if the received level on any of the timeslots belonging to the same multislot configuration as the wanted time slot, exceed the wanted time slot by more than 6 dB.

The interfering adjacent time slots shall be static with valid GSM signals in all cases.

3GPP TS 45.005, subclause 6.2.

Specific PICS statements:

14.18.1d.3 Test purpose

1. To verify that the MS sends a Packet Not Acknowledge in the EC Packet Downlink Ack/Nack message, see TS in case of the Block Check Sequence (BCS) indicating a Block Error.

2. To verify that the MS does not exceed 20% BLER for EC-PDTCH/MCS-1 and EC-PDTCH/MCS-1/16 as specified in conformance requirement 1 under different propagation conditions with an allowance for the statistical significance of the test.

3. To verify that the MS does not exceed 20% BLER for EC-PDTCH/MCS-1 and EC-PDTCH/MCS-1/16 as specified in conformance requirement 2 under STATIC, TU1.2, and TU50 propagation conditions for the EC-PDTCH

14.18.1d.4 Method of test

Initial conditions

NOTE 1: The BA list sent on the EC-BCCH will indicate at least six surrounding cells with at least one near to each band edge. It is not necessary to generate any of these BCCHs but, if provided the signal strengths of BCCHs shall be in the range 15 dBVemf(  ) to 35 dBVemf(  ). Surrounding cell signal levels and cell reselection parameters are set so that the MS will not try a cell reselection.

NOTE 2: The ARFCN of any BCCH shall not be co-channel or on adjacent channels to the wanted traffic channel.

NOTE 3: When frequency hopping is used under static conditions, the traffic channel may fall on any of the ARFCNs defined in clause 6. When frequency hopping is used under non-static conditions any ARFCNs shall be chosen.

A downlink EC TBF is set up according to the generic procedure specified in clause 40 for packet switched on an ARFCN in the Mid range. The power control parameter ALPHA (α) is set to 0. The SS shall transmit on the maximum number of receive timeslots. The SS commands the MS to transmit at maximum power.

Test procedure

For GMSK Modulation:

a) The SS transmits packets under static conditions, using EC-PDTCH/MCS-1 coding at a level of 1 dB above the level given in table14.18.1d-1. Out of the 400 blocks transmitted by the SS, 20 blocks are sent with incorrect BCS, at (pseudo) random positions. The SS checks, for the blocks it transmitted with incorrect BCS, whether or not the MS EC Packet Downlink Ack/Nack, see TS 44.018 sub-clause 11.2.51, as sent by the MS indicates these blocks as not acknowledged.

b) The SS transmits packets under static conditions, with the MS commanded to hopping mode using the hopping sequence used in clause 6, and using EC-PDTCH/MCS-1 coding to the MS on all allocated timeslots, at a level of 1 dB above the level given in table 14.18.1d-1.

c) The SS counts the number of blocks transmitted with EC-PDTCH/MCS-1 and the number of these blocks not acknowledged based on the content of the EC Packet Downlink Ack/Nack Description information element (see 3GPP TS 44.060, subclause 11.2.51) in the EC Packet Downlink Ack/Nack as sent from the MS to the SS on the PACCH.

d) Once the number of blocks transmitted with EC-PDTCH/MCS-1 as counted in step c) reaches or exceeds the minimum number of blocks as given in table 14-18-2, the SS calculates the Block error ratio. The SS resets both counters.

e) The SS repeats step b) to d) with the following two fading conditions and hopping modes: TU1.2/noFH and TU1.2/FH in case ideal decorrelation can be ensured between the burst. For these tests with fading channels , the SS does not transmit on the timeslots not allocated to the MS.

f) The SS repeats steps b) to d) using EC-PDTCH/MCS-1/16 CC4 coding with TU1.2/No FH, EC-PDTCH/MCS-1/8 CC2 coding with TU50/No FH, EC-PDTCH/MCS-1/8 CC2 coding with TU1.2 No FH and EC-PDTCH/MCS-1/4 CC3 coding with TU1.2/FH. For these tests, the SS does not transmit on the timeslots not allocated to the MS.

g) The SS repeats steps b) to e) under extreme test conditions for EC-PDTCH/MCS-1 coding only.

14.18.1d.5 Test requirements

In step a) the Packet Downlink Ack/Nack as sent by the MS shall indicate every block transmitted by the SS with incorrect BCS as not acknowledged.

The block error ratio, as calculated by the SS for different channels and under the different propagation conditions, under any combination of normal and extreme test voltages and ambient temperatures, shall not exceed the conformance requirement.

In the case when downlink power control is not used and the output power used on the transmitted blocks is not equal to (BCCH level – Pb) then the MS is not required to fulfil 3GPP TS 45.005 requirements for the first 25 blocks addressed to this MS (3GPP TS 45.008, subclause 10.2.2).