90 Text Telephony (TTY) Services

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

This subclause contains test cases for Text Telephony (TTY) services.

90.1 Transmission of CTM Bearer Code

90.1.1 Mobile Originated TTY Call

90.1.1.1 Conformance requirement

1) When establishing a mobile originated call with TTY mode enabled in the MS, bit 6 of Octet 3a in the Bearer Capability Information Element shall be ‘1’.

2) When establishing a mobile originated call with TTY mode disabled in the TTY-compatible MS, bit 6 of Octet 3a in the Bearer Capability Information Element shall be ‘0’.

Reference(s):

For conformance requirement 1 and 2:

3GPP TS 04.08 / TS 24.008, subclause 10.5.4.5

90.1.1.2 Test purpose

  1. To verify that a TTY compatible MS, with TTY mode enabled, correctly sets bit 6 of Octet 3a in the Bearer Capability Information Element to 1 when made to originate a call.
  2. To verify that a TTY compatible MS, with TTY mode disabled, correctly sets bit 6 of Octet 3a in the Bearer Capability Information Element to 0 when made to originate a call.

90.1.1.3 Method of test

90.1.1.3.1 void

90.1.1.3.2 Initial conditions

System Simulator:

– 1 cell, default parameters.

Mobile Station:

– The MS is in MM-state “idle, updated” with valid TMSI and CKSN.

90.1.1.3.3 Final foreseen state of the MS

U0, null.

90.1.1.3.4 Test Procedure

a) The MS is set to TTY mode using the normal MMI. A mobile originated call is established following the generic call set-up procedure for mobile originating speech calls.

b) After receipt of the SETUP message from the MS, the SS shall disconnect the call.

c) TTY mode is disabled in the MS using the normal MMI. A mobile originated call is established following the generic call set-up procedure for mobile originating speech calls.

d) After receipt of the SETUP message from the MS, the SS shall disconnect the call.

90.1.1.4 Test requirement

1) In step a), the MS shall send a SETUP message where bit 6 of Octet 3a of the Bearer Capability Information Element is set to 1.

2) In step c), the MS shall send a SETUP message where bit 6 of Octet 3a of the Bearer Capability Information Element is set to 0.

90.1.2 Mobile Terminated TTY Call

90.1.2.1 Conformance requirement

1) When establishing a mobile terminated call with TTY mode enabled in the MS, bit 6 of Octet 3a in the Bearer Capability Information Element shall be ‘1’.

2) When establishing a mobile terminated call with TTY mode disabled in the TTY-compatible MS, bit 6 of Octet 3a in the Bearer Capability Information Element shall be ‘0’.

Reference(s):

For conformance requirement 1 and 2:

3GPP TS 04.08 / TS 24.008, subclause 10.5.4.5

90.1.2.2 Test purpose

  1. verify that a TTY compatible MS, with TTY mode enabled, correctly sets bit 6 of Octet 3a in the Bearer Capability Information Element to 1 when receiving a mobile terminated call.
  2. To verify that a TTY compatible MS, with TTY mode disabled, correctly sets bit 6 of Octet 3a in the Bearer Capability Information Element to 0 when receiving a mobile terminated call.

90.1.2.3 Method of test

90.1.2.3.1 void

90.1.2.3.2 Initial conditions

System Simulator:

– 1 cell, default parameters.

Mobile Station:

– The MS is in MM-state “idle, updated” with valid TMSI and CKSN.

90.1.2.3.3 Final foreseen state of the MS

U0, null.

90.1.2.3.4 Test Procedure

a) The MS is set to TTY mode using the normal MMI. A mobile terminated call is established following the generic call set-up procedure for mobile terminating speech calls.

b) After receipt of the CALL CONFIRMED message from the MS, the SS shall disconnect the call.

c) TTY mode is disabled in the MS using the normal MMI. A mobile terminated call is established following the generic call set-up procedure for mobile terminating speech calls.

d) After receipt of the CALL CONFIRMED message from the MS, the SS shall disconnect the call.

90.1.2.4 Test requirement

1) In step a), the MS shall send a CALL CONFIRMED message where bit 6 of Octet 3a of the Bearer Capability Information Element is set to 1.

2) In step c), the MS shall send a CALL CONFIRMED message where bit 6 of Octet 3a of the Bearer Capability Information Element is set to 0.

Annex A1 (normative):
Reference test methods