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Content for  TS 23.558  Word version:  19.1.0

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8  Procedures and information flowsp. 51

8.1  Generalp. 51

This clause provides procedures and information flows necessary for enabling edge application including information elements used in the procedures.

8.2  Common Information Elementsp. 51

8.2.1  Generalp. 51

This clause provides descriptions for Information Elements which are commonly used in several procedures.

8.2.2  AC Profilep. 51

An AC Profile includes information about AC used to determine services and service characteristics required.
Information element Status Description
ACIDMIdentity of the AC.
AC TypeOThe category or type of AC (e.g. V2X). This is an implementation specific value.
Preferred ECSP listOWhen used in a service provisioning request, this IE indicates to the ECS which ECSPs are preferred for the AC. The ECS may use this information in the selection of EESs.
AC ScheduleOThe expected operation schedule of the AC (e.g. time windows)
Expected AC Geographical Service AreaOThe expected location(s) (e.g. route) of the hosting UE during the AC's operation schedule. This geographic information can express a geographic point, polygon, route, signalling map, or waypoint set.
AC Service Continuity Support (NOTE 1)OIndicates if service continuity support is required or not for the application. The IE indicates which ACR scenarios are supported by the AC and which of these are preferred by the AC, also indicates the AC ability (e.g. EAS bundle information) of handling bundled EAS ACR.
Simultaneous EAS connectivity information in service continuityOIndicates if simultaneous EAS connectivity is needed and the inactive time guidance for keeping connectivity towards the S-EAS.
List of EASsOList of EAS that serve the AC along with the service KPIs required by the AC
> EASIDMIdentifier of the EAS
> Expected AC Service KPIsO KPIs expected in order for ACs to receive currently required services from the EAS, as described in Table 8.2.3-1
> Minimum required AC Service KPIsO Minimum KPIs required in order for ACs to receive meaningful services from the EAS, as described in Table 8.2.3-1
List of required EAS bundle informationOInformation related to the EAS bundles which the AC requires.
> Bundle ID (NOTE 2)OBundle ID as described in clause 7.2.10.
> List of EASIDs (NOTE 2)OList of EASIDs associated with the EAS bundle.
> Bundle typeMType of the EAS bundle as described in clause 7.2.10.
> Main EASIDOIndicate which EAS in a bundle takes the main EAS service role.
> EAS bundle requirementsORequirements associated with the EAS bundle as described in clause 8.2.10.
NOTE 1:
The EAS bundle information is not applicable for proxy type of EAS bundle.
NOTE 2:
At least one of the IEs shall be present if EAS bundle information is provided.
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8.2.3  AC Service KPIsp. 52

AC Service KPIs provide information about service characteristics required by the ACs.
Information element Status Description
Connection bandwidthOThe required connection bandwidth in Kbit/s for the application.
Request rateOThe request rate to be generated by the AC.
Response timeOResponse time (NOTE) required for the server servicing the requests.
AvailabilityOPercentage of time the server is required to be available for the AC's use.
ComputeOThe compute resources required by the AC.
Graphical ComputeOThe graphical compute resources required by the AC.
MemoryOThe memory resources required by the AC.
StorageOThe storage resources required by the AC.
NOTE:
The response time includes the round-trip time of the request and response packet, the processing time at the server and the time required by the server to consume 3GPP Core Network capabilities, if any.
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8.2.4  EAS Profilep. 53

An EAS Profile includes information about an EAS used to describe services and service characteristics offered.
Information element Status Description
EASIDMThe identifier of the EAS
EAS EndpointMEndpoint information (e.g. URI, FQDN, IP address) used to communicate with the EAS. This information maybe discovered by EEC and exposed to ACs so that ACs can establish contact with the EAS.
List of EAS bundle informationOList of EAS bundles to which the EAS belongs and related bundling requirements.
> Bundle ID (NOTE 3)OBundle ID as described in clause 7.2.10.
> List of EAS IDs (NOTE 2, NOTE 3)OList of the EAS IDs of the EASs to be invoked by the EAS for an EAS driven association of EASs.
> Bundle typeMType of the EAS bundle as described in clause 7.2.10.
> Main EASIDOIndicate which EAS in a bundle takes the main EAS service role.
> EAS bundle requirementsORequirements associated with the EAS bundle as described in clause 8.2.10.
ACID(s)OIdentifies the AC(s) that can be served by the EAS
EAS Provider IdentifierOThe identifier of the ASP that provides the EAS.
EAS TypeOThe category or type of EAS (e.g. V2X, UAV, application enabler).
Allowed MNO information (NOTE 4)OInformation of the allowed operator (e.g. MNO name, PLMN ID) from which its subscriber can consume the EAS services.
EAS descriptionOHuman-readable description of the EAS.
EAS ScheduleOThe availability schedule of the EAS (e.g. time windows).
EAS Geographical Service AreaOThe geographical service area that the EAS serves. ACs in UEs that are located outside that area shall not be served.
EAS Topological Service AreaO The EAS serves UEs that are connected to the Core Network from one of the cells included in this service area. ACs in UEs that are located outside this area shall not be served. See possible formats in Table 8.2.7-1.
EAS Service KPIsO Service characteristics provided by EAS, detailed in Table 8.2.5-1.
EAS service permission levelOLevel of service permissions e.g. trial, gold-class supported by the EAS.
EAS Feature(s)OService features e.g. single vs. multi-player gaming service supported by the EAS.
EAS synchronization supportOIndicates if the EAS supports content synchronization between EASs.
EAS Service continuity supportOIndicates if the EAS supports service continuity or not. This IE indicates which ACR scenarios are supported by the EAS, also indicates the EAS ability (e.g. EAS bundle information) of handling bundled EAS ACR.
EAS Transport layer service continuity supportOThis IE indicates the EAS service continuity support for seamless transport layer (e.g. TCP/TLS/QUIC) relocation.
General context holding time duration (NOTE 1)OThe time duration that the EAS holds the context before the AC connects to the EAS in case of ACR for service continuity planning. It is an indication of the time the EAS holds the application context for a UE to move to its service area after receiving an ACR notification from the EES following an ACR request from the EEC.
List of EAS DNAI(s)ODNAI(s) associated with the EAS. This IE is used as Potential Locations of Applications in clause 5.6.7 of TS 23.501.
It is a subset of the DNAI(s) associated with the EDN where the EAS resides.
List of N6 Traffic Routing requirementsOThe N6 traffic routing information and/or routing profile ID corresponding to each EAS DNAI.
EAS Availability Reporting PeriodOThe availability reporting period (i.e. heartbeat period) that indicates to the EES how often it needs to check the EAS's availability after a successful registration.
EAS StatusOThe status of the EAS (e.g. enabled, disabled, etc.)
NOTE 1:
Since the EASID of the EAS identifies the type of the application (e.g. SA6Video, SA6Game etc) as described in clause 7.2.4, "General context holding time duration" determined by EAS can depend on the EASID (type of the application).
NOTE 2:
This IE may be provided when only bundle ID is provided, and the bundle type indicates the proxy bundle.
NOTE 3:
At least one of the IEs shall be present if EAS bundle information is provided.
NOTE 4:
For edge node sharing scenario, in order to restrict the access to the subscriber of the partner operator, this IE should only include MNO information of the leading operator.
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8.2.5  EAS Service KPIsp. 54

EAS Service KPIs provide information about service characteristics provided by the EAS
Information element Status Description
Maximum Request rateOMaximum request rate from the AC supported by the server.
Maximum Response time (NOTE)OThe maximum response time advertised for the AC's service requests.
AvailabilityOAdvertised percentage of time the server is available for the AC's use.
Available ComputeOThe maximum compute resource available for the AC.
Available Graphical ComputeOThe maximum graphical compute resource available for the AC.
Available MemoryOThe maximum memory resource available for the AC.
Available StorageOThe maximum storage resource available for the AC.
Connection BandwidthOThe connection bandwidth in Kbit/s advertised for the AC's use.
NOTE:
The maximum response time includes the round-trip time of the request and response packet, the processing time at the server and the time required by the server to consume 3GPP Core Network capabilities, if any.
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8.2.6  EES Profilep. 55

The EES profile includes information about the EES and the services it provides.
Information element Status Description
EESIDMThe identifier of the EES
EES EndpointMEndpoint information (e.g. URI, FQDN, IP address) used to communicate with the EES. This information is provided to the EEC to connect to the EES.
EASIDsMList of EASIDs registered or expected to be registered with the EES.
>Allowed MNO informationOInformation of the allowed operator as described in EAS profile clause 8.2.4, Only subscribers from these operators can consume the EES services.
List of EAS bundle informationOList of EAS bundles per EASID to which the EAS belongs and related bundling requirements.
> Bundle ID (NOTE 2)OA bundle ID as described in clause 7.2.10.
> List of EASIDs (NOTE 2)OList of EASIDs associated with the EAS bundle.
> Bundle typeMType of the EAS bundle as described in clause 7.2.10.
> EAS bundle requirementsORequirements associated with the EAS bundle as described in clause 8.2.10.
Instantiable EAS informationOThe EAS instantiation status per EASID (e.g. instantiated, instantiable but not be instantiated yet).
> Instantiation criteria (NOTE 1)OThe criteria upon which EAS can be instantiated (e.g. based on specific date and time).
EEC registration configurationMIndicates whether the EEC is required to register on the EES to use edge services or not.
ECSP IDOThe identifier of the ECSP that provides the EES.
EES Topological Service AreaO The EES serves UEs that are connected to the Core Network from one of the cells included in this service area. EECs in UEs that are located outside this area shall not be served. See possible formats in Table 8.2.7-1.
EES Geographical Service AreaOThe area being served by the EES in Geographical values (as specified in clause 7.3.3.3)
List of EES DNAI(s)ODNAI(s) associated with the EES. This IE is used as Potential Locations of Applications in clause 5.6.7 of TS 23.501.
It is a subset of the DNAI(s) associated with the EDN, where the EES resides.
EES Service continuity supportOIndicates if the EES supports service continuity or not. This IE indicates which ACR scenarios are supported by the EES, also indicates the EES ability (e.g. EAS bundle information) of handling bundled EAS ACR.
NOTE 1:
"Instantiation criteria" IE shall be present only when the value of "Instantiable EAS information" IE is "instantiable but not be instantiated yet".
NOTE 2:
At least one of the IEs shall be present if EAS bundle information is provided.
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8.2.7  Topological Service Areap. 56

The following formats may be used for expressing a Topological Service Area:
Information element Status Description
Cell IDs (NOTE)OThe list of cell IDs defining the Topological Service Area
TAIs (NOTE)OThe list of Tracking Area IDs defining the Topological Service Area
PLMN IDs (NOTE)OThe list of PLMN IDs defining the Topological Service Area
NOTE:
A combination of these information elements can be used to define the Topological Service Area. Combinations should not have duplicate or overlapping information for the same Topological Service Area.
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8.2.8  EEC Contextp. 57

The EEC Context includes information about an EEC for receiving edge enabler services.
Information element Status Description
EEC IDMUnique identifier of the EEC.
EEC Context IDMIdentifier assigned to the EEC Context
Source EES EndpointMThe endpoint address (e.g., URI, IP address) of the EES that provided EEC context ID.
UE IdentifierOThe identifier of the hosting UE (i.e., GPSI or identity token)
List of EDGE-1 subscriptionsOList of subscriptions IDs for capability exposure to the EEC ID (NOTE).
UE locationOLatest UE location of the UE hosting the EEC which was available at the EES.
List of AC ProfilesO Information about the ACs as described in Table 8.2.2-1.
UE Mobility Support RequirementOIndicates UE requires mobility support or not.
For the request over EDGE-1 interface, the EES as per ECSP policy and EAS requirements, may decide whether to subscribe to NEF or NWDAF for UE location information based on this information.
List of Service Session ContextsOList of associated Service Session Context IEs. Each Service Session Context includes information maintained by the EES for the services (involving UE related resources) received from an EAS registered to the EES.
> Service Session ContextM Service Session Context is described in Table 8.2.8-2
EEC Service Continuity SupportOIndicates if the EEC supports service continuity or not. The IE also indicates which ACR scenarios are supported by the EEC.
NOTE:
The corresponding EDGE-1 subscription information may include 3GPP CN subscription information such as subscription correlation ID
Information element Status Description
EAS IDMIdentifier of the EAS providing the application services
EAS EndpointMEndpoint information of the EAS.
AC IDOIdentifier of the AC ID for which the service session is provided, if determined.
Selected ACR scenario listOList of selected ACR scenarios.
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8.2.9  Geographical Service Areap. 57

The following formats may be used for expressing a Geographical Service Area:
Information element Status Description
Geographical Area DescriptionOA shape defined in TS 23.032
Civic LocationOAn area identified by a civic location element, e.g. building, park, arena, civic address or ZIP code.
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8.2.10  EAS bundle requirements |R18|p. 57

The following IEs describe the EAS bundle requirements:
Information element Status Description
Coordinated EAS discoveryOIndicates if coordinated EAS discovery is required i.e., if EAS discovery request for one of the bundled EAS is processed, then EAS discovery response should include information of all the EASs belonging to the bundle.
Coordinated ACROIndicates if coordinated ACR is required i.e., if EAS ACR is initiated for one of the bundled EAS, then ACR should be initiated for all the EASs belonging to the bundle.
The IE may further indicate what actions must be taken if ACR for one or more bundled EAS fails e.g. ACR for all other EAS that are part of the bundle must be cancelled or not.
AffinityO Indicates the affinity requirement of the EAS bundle. The IE can be set to "strong" indicating that the EASs must be in the same EDN, "preferred" indicating that it is nice to have EASs in the same EDN but not essential or "weak" indicating that it's not essential for EASs to be in the same EDN.
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8.2.11  Application Group profile |R18|p. 58

An Application Group profile includes information about the Application Group used to determine common EAS.
Information element Status Description
Application Group IDMApplication group identifier as defined in clause 7.2.11.
EAS IDMIdentifier of EAS.
Expected Group Geographical Service AreaOThe expected location(s) (e.g. route) of the group of UEs during the AC's operation schedule. This geographic information can express a geographic point, polygon, route, signalling map, or waypoint set.
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8.2.12  ECS Profile |R18|p. 58

The ECS profile includes information about the ECS and EDN configuration information it provides.
Information element Status Description
ECS addressMEndpoint information of ECS (e.g. URI, FQDN, IP address).
ECSP IdentifierOThe identifier of the ECSP (e.g., the MNO or a 3rd party service provider) that provides the ECS.
Spatial Validity ConditionsOSpatial validity condition, as described in TS 23.548.
Federation informationOList of information for different federation agreements related to the ECS.
> List of partner ECSPsOList of ECSPs that are authorized to receive the information of this ECS.
List of supported PLMN(s)OThe List of PLMNs and associated ECSPs for which EDN configuration information can be provided by the ECS.
> PLMN IDOThe identifier of a PLMN for which EDN configuration information can be provided by the ECS.
> List of supported ECSP(s)OThe identifier of the ECSP(s) associated with the PLMN and whose information is available at the ECS.
>> ECSP IDMIdentifier of an ECSP.
>>> EASIDsMList of EASIDs available or expected to be available through the ECSP.
> PDU configurationODNN and S-NSSAI information for roaming UEs to establish an PDU session with the ECS.
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