Content for TS 23.558 Word version: 19.0.0
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8.19 Common EAS announcement
8.19.1 General
8.19.2 Procedure
8.19.3 Information flows
8.19.3.1 General
8.19.3.2 Announce common EAS request
8.19.3.3 Announce common EAS response
8.19.4 APIs
8.19.4.1 General
8.19.4.2 Eees_CommonEasAnnouncement_Declare operation
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8.19 Common EAS announcement |R18| p. 261
8.19.1 General p. 261
Common EAS announcement procedure enables an EES to exchange selected common EAS information with other EES(s).
8.19.2 Procedure p. 261
Pre-conditions:
- The announcing EES may be pre-configured with the EES information of other receiving EES(s), which belongs to the same EDN; or
- The announcing EES may receive the list of receiving EES(s) information (e.g. address information) from the EEC during the EAS information provisioning procedure.
Step 1.
The announcing EES sends Announce common EAS request message to the receiving EES. The request message includes the requestor identifier [EESID], the security credentials, the selected common EAS information, the announcing EES endpoint, and the Application group ID.
Step 2.
Upon receiving the request from the announcing EES, the receiving EES checks if the announcing EES is authorized to provide the selected common EAS. The receiving EES stores the received selected EAS information and announcing EES endpoint along with the Application group ID.
Step 3.
If the processing of the request was successful, the receiving EES sends Announce common EAS response to the announcing EES indicating a successful status; otherwise, the receiving EES shall indicate a failure status and include appropriate reasons.
8.19.3 Information flows p. 262
8.19.3.1 General p. 262
The information flows are specified for Announce common EAS request and response.
8.19.3.2 Announce common EAS request p. 262
Table 8.19.3.2-1 describes the information elements for Announce common EAS request from the announcing EES to the receiving EES.
| Information element | Status | Description |
|---|---|---|
| Requestor identifier | M | The identifier of the announcing EES. |
| Security credentials | M | Security credentials resulting from a successful authorization for the edge computing service. |
| Selected common EAS ID | M | The identifier of the Selected Common EAS. |
| Selected common EAS endpoint | M | The endpoint of the Selected Common EAS. |
| EES endpoint | O | The endpoint address (e.g., URI, IP address) of the announcing EES. |
| Application Group ID | M | Application group identifier as defined in clause 7.2.11. |
8.19.3.3 Announce common EAS response p. 262
Table 8.19.3.3-1 describes the information elements for Announce common EAS response from the receiving EES to the announcing EES.
| Information element | Status | Description |
|---|---|---|
| Successful response | O | Indicates that the request was successful. |
| Failure response | O | Indicates that the request has failed. |
| Cause | O | Indicates the failure cause. Only included when Failure Response is included. |
8.19.4 APIs p. 262
8.19.4.1 General p. 262
Table 8.19.4.1-1 illustrates the API for common EAS announcement.
| API Name | API Operations | Operation Semantics | Consumer(s) |
|---|---|---|---|
| Eees_ | Declare | Request/ Response | EES |
8.19.4.2 Eees_CommonEasAnnouncement_Declare operation p. 262
API operation name:
Eees_CommonEasAnnouncement_Declare
Description:
The consumer declares common EAS information to the EES.
Inputs:
See clause 8.19.3.2.
Outputs:
See clause 8.19.3.3.
See clause 8.19.2 for details of usage of this operation.
