20.10 Running average of the serving cell BCCH carrier signal level

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

20.10.1 Definition

The MS is required to monitor continuously the BCCH carrier signal level of the serving cell (and to compare it to the BCCH carrier signal levels of the non-serving cells) to guarantee that it is camped on the most suitable cell.

20.10.2 Conformance requirement

1. For the serving cell, receive level measurement samples shall be taken at least for each paging block of the MS. The RLA_C shall be a running average determined using samples collected over a period of 5 s to Max {5s, five consecutive paging blocks of that MS}. New sets of RLA_C values shall be calculated as often as possible.; 3GPP TS 45.008, subclause 6.6.1.

20.10.3 Test purpose

1. To verify that by using suitable varying levels of signal strength for the serving cell, the MS performs a running average over 5 consecutive paging blocks.

20.10.4 Method of test

20.10.4.1 Initial conditions

Parameters changed from Default values table 20.1.

Parameter

Carrier 1

Carrier 2

Carrier 3

Carrier 4

Carrier 5

Carrier 6

RF signal level

(dBV emf() / dBm)

63 / -50

39 / -74

OFF

OFF

OFF

OFF

RxLev_Access_Min (dBV emf() / dBm)

23 / -90

23 / -90

C1

40

16

C2

40

16

NOTE: With BS_PA_MFRMS = 5 (default value), the averaging time of the MS on the serving cell BCCH is 5,9 s.

20.10.4.2 Procedure

a) The SS activates the carriers. The MS is not paged on carrier 1. The SS monitors carriers 1 and 2 for RA requests from the MS.

b) The MS is switched on.

c) After 50 s the SS starts switching the level of carrier 1 between -80 dBm and -50 dBm every 3 s.

NOTE: As a result of the switching in levels, the running average on carrier 1 will be between -62 dBm and ‑68 dBm over five consecutive paging blocks.

d) The SS increases the level of carrier 2 to -56 dBm.

20.10.5 Test requirement

1) After step c), the MS shall not access on carrier 2, within 25 s.

2) After step d), the MS shall access on carrier 2, within 30 s.

NOTE: 13,75 s to perform running average, 10 s to detect C2 differences, 2,4 s to read BCCH of carrier 2, 1 s to perform RA. Total 27,15 s, allow 30 s.