UPDATE-1 Update message of ongoing warning in local language. No indication.

Description

Update the message content of an ongoing cell broadcast in local language. the alert area is not modified and indication is not requested from the network.

Pre-requisites

• Activate a cell broadcast message in local language in a specific area (e.g. following the procedure in TC START-1). For simplicitly, this TC is assumes that the area is fully covered by eNBs controlled by the same MME.
• Alert timing defined so that the broadcast will run for suficient time to execute this test completely.
• Configure the different systems to not request SBc-AP indication messages.

Steps to execute

1. CBE sends CAP Alert message with:
   • msgType sub-element set to "Update".
   • references sub-element contains the identifier of the CAP Alert message that triggered the current active broadcast.
   • A single info element with the updated message in local language. The message shall be at least 2 pages long but not more than 4 pages.
   • Time information that allows the CBC to calculate the repetition period and the number of repetitions.
   • Alert area shall be the same as that in the CAP Alert message (flow 1) that triggered the broadcast message being updated.

Information flow

Result

A CBC has two different ways to process this update request from the CBE. The result depends on the option implemented.

Option 1 - CBC uses WRWReq

Verify that:

1. The CBC sends a WRITE-REPLACE WARNING REQUEST (flow 5.a) to the MME that controls the eNBs that cover the alert area. Presence of parameters in this message shall be as shown in the following table:

   Information Element	Included	Value
   Message Identifier	Yes	for current iteration
   Serial Number	Yes	Same values of GS and Message code as in flow 2 but different update number
   List of TAIs	Should	Same as flow 2
   Warning Area List	Yes	Same as flow 2
   Repetition Period	Yes	According to the timing requested in flow 4
   Extended Repetition Period	No
   Number of Broadcast Requested	Yes	According to the timing requested in flow 4
   Warning Type	No
   Warning Security Information	No
   Data Coding Scheme	Yes	Set for local language according to 3GPP TS 23.038
   Warning Message Contents	Yes	Alert message encoded according to the value of DCS above
   Concurrent Warning Message Indicator	Yes	true
   Send Write-Replace-Warning-Indication	No
   Global eNB ID	No

2. The MME responds with a WRITE-REPLACE WARNING RESPONSE (flow 6.a) with contents according to the following table.

   Information Element	Included	Value
   Message Identifier	Yes	Same as in flow 5.a
   Serial Number	Yes	Same as in flow 5.a
   Cause	Yes	Set to value Message accepted
   Criticality Diagnostics	No
   Unknown Tracking Area List	No

3. Handsets in the alert area receive the updated alert and display it correctly, regardless of whether they were in the area and displayed the first version of this message or entered the area once the message was updated.

Option 2 - CBC Stops the initial message and sends the updated as a new message

Verify that:

1. The CBC sends a STOP WARNING REQUEST (flow 5.b) to the MME that controls the eNBs that cover the alert area. Presence of parameters in this message shall be as shown in the following table:

   Information Element	Included	Value
   Message Identifier	Yes	for current iteration
   Serial Number	Yes	Same as in flow 2
   List of TAIs	May	Same as in flow 2
   Warning Area List	May	Same as in flow 2
   Send Stop Warning Indication	No
   Stop All Indication	No

2. The MME responds with a STOP WARNING RESPONSE (flow 6.b) with contents according to the following table.

   Information Element	Included	Value
   Message Identifier	Yes	Same as in flow 2
   Serial Number	Yes	Same as in flow 2
   Cause	Yes	Set to value Message accepted
   Criticality Diagnostics	No
   Unknown Tracking Area List	No

3. Broadcast of the alert has stopped in all the cells in which it was active.

4. The CBC sends a WRITE-REPLACE WARNING REQUEST (flow 7.b) to the MME that controls the eNBs that cover the alert area. Presence of parameters in this message shall be as shown in the following table:

   Information Element	Included	Value
   Message Identifier	Yes	for current iteration
   Serial Number	Yes	Different to the one in flow 2
   List of TAIs	Should	Same as flow 2
   Warning Area List	Yes	Same as flow 2
   Repetition Period	Yes	According to the timing requested in flow 4
   Extended Repetition Period	No
   Number of Broadcast Requested	Yes	According to the timing requested in flow 4
   Warning Type	No
   Warning Security Information	No
   Data Coding Scheme	Yes	Set for local language according to 3GPP TS 23.038
   Warning Message Contents	Yes	Alert message encoded according to the value of DCS above
   Concurrent Warning Message Indicator	Yes	true
   Send Write-Replace-Warning-Indication	No
   Global eNB ID	No

5. The MME responds with a WRITE-REPLACE WARNING RESPONSE (flow 8.b) with contents according to the following table.

   Information Element	Included	Value
   Message Identifier	Yes	Same as in flow 7.b
   Serial Number	Yes	Same as in flow 7.b
   Cause	Yes	Set to value Message accepted
   Criticality Diagnostics	No
   Unknown Tracking Area List	No

6. Handsets in the alert area receive the updated alert and display it correctly, regardless of whether they were in the area and displayed the first version of this message or entered the area once the message was updated.

Iterations

This TC should be iterated for the alert types in the following table that are applicable in the country in which the CBC is deployed:

Iteration	Alert Type	Message identifier
1	EU-Alert Level 1 \ WEA Presidential	4370 (0x1112)
2	EU-Alert Level 2 \ WEA Extreme	[4371, 4372] ([0x1113, 0x1114])
3	EU-Alert Level 3 \ WEA Severe	[4373 ... 4378] ([0x1115 ... 0x111A)
4	EU-Alert & WEA AMBER	4379 (0x111B)
5	WEA RMT	4380 (0x111C)
6	WEA Exercise	4381 (0x111D)
7	WEA Operator defined use	4382 (0x111E)
8	EU-Alert Level 4 \ WEA Public Safety	4396 (0x112C)
9	WEA State/Local test	4398 (0x112E)
10	EU-Info	6400 (0x1900)