26.8.3 User to user signalling
3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS
26.8.3.1 Definition
The "user to user" information element is used to convey information between the mobile user and a remote ISDN user. This test is therefore applicable for any equipment supporting at least one mobile terminating circuit switched basic service.
NOTE: There is no test for an MS originating call including a "user-user" information element since it is not a mandatory MS feature.
26.8.3.2 Conformance requirement
The inclusion of the "user-user" information element in downlink call control messages shall cause no adverse effects on the operation of the MS.
References
3GPP TS 04.08 / 3GPP TS 24.008 subclauses 5.2.2, 9.3.7, 9.3.23.1 and 10.5.4.25.
26.8.3.3 Purpose of the test
The purpose of this test is to verify that inclusion of the "user-user" information element in either of the down link messages, SETUP or DISCONNECT causes no adverse effects on the operation of the MS.
26.8.3.4 Method of test
Specific PICS statements
–
PIXIT statements
–
Initial conditions.
System Simulator:
The SS simulates 1 cell, with default parameters.
Mobile Station:
The MS is in MM-state "idle updated", with a valid TMSI and CKSN.
Foreseen final state of the MS
The MS is in MM-state "idle updated", with a valid TMSI and CKSN.
Maximum duration of test
2 minutes.
Test procedure
The SS attempts to set up a mobile terminated call, with one of the supported circuit switched basic services which has been arbitrarily chosen, using one of the generic call set up procedures,(either speech or data) as specified in clause 10. The default SETUP message contents are modified to include the user-user Information Element. The MS shall not respond adversely to the inclusion of the user-user information element.
After 30 s the SS sends a DISCONNECT message, again the MS shall not respond adversely to the inclusion of the user-user information element, but shall continue to clear down the call normally.
Expected sequence
|
Step |
Direction |
Message |
Comments |
|
1 |
Generic Call Setup procedure defined in clauses 10.1 or 10.3, depending on choice of Bearer Capability. The SETUP message in either case contains the user-user IE, see Specific message contents. |
||
|
2 |
The SS waits 30 s. |
||
|
3 |
SS -> MS |
DISCONNECT |
Message contains the user-user IE, see Specific message contents |
|
4 |
MS -> SS |
RELEASE |
As defined in subclause 26.8.4 |
|
5 |
SS-> MS |
RELEASE COMPLETE |
As defined in subclause 26.8.4 |
|
6 |
SS-> MS |
CHANNEL RELEASE |
As defined in subclause 26.8.4 |
Specific message contents:
SETUP
As default message contents as defined in the Generic Call setup procedures subclauses 10.1 or 10.3 except:
|
Information Element |
value/remark |
|
Bearer Capability |
Bearer capability arbitrarily chosen from those supported by the Mobile Station under test. |
|
user-user |
|
|
– length |
Length of user-user contents (note) |
|
– PD |
IA5 characters (note) |
|
– user-user |
The following string coded in IA5 characters: "Call Setup" (note) |
DISCONNECT
As default message contents as defined in subclause 26.8.4, except:
|
Information Element |
value/remark |
|
user-user |
|
|
– length |
Length of user-user contents (note) |
|
– PD |
IA5 characters (note) |
|
– user-user |
The following string coded in IA5 characters: "Call Disconnect" (note) |
|
NOTE: The codings above are for example only. For the case of an MS which supports "user-user" signalling it may be necessary to add meaning to the data fields, see PICS/PIXIT statement(s). |
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