openapi: 3.0.0

info:
  title: 3gpp-mbs-tmgi
  version: 1.2.0
  description: |
    API for the allocation, deallocation and management of TMGI(s) for MBS.  
    © 2025, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC).  
    All rights reserved.

externalDocs:
  description: >
    3GPP TS 29.522 V19.5.0; 5G System; Network Exposure Function Northbound APIs.
  url: 'https://www.3gpp.org/ftp/Specs/archive/29_series/29.522/'

security:
  - {}
  - oAuth2ClientCredentials: []

servers:
  - url: '{apiRoot}/3gpp-mbs-tmgi/v1'
    variables:
      apiRoot:
        default: https://example.com
        description: apiRoot as defined in clause 5.2.4 of 3GPP TS 29.122.

paths:
  /allocate:
    post:
      summary: Request the allocation of TMGI(s) for new MBS session(s) or the refresh of the expiry time of already allocated TMGI(s).
      operationId: AllocateTmgi
      tags:
        - TMGI Allocation or Timer Expiry Refresh
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TmgiAllocRequest'
      responses:
        '200':
          description: >
            OK. Successful case. The allocated TMGI(s) or a refreshed expiry time for the concerned
            already allocated TMGI(s) is/are returned to the requesting AF.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TmgiAllocResponse'
        '307':
          $ref: 'TS29122_CommonData.yaml#/components/responses/307'
        '308':
          $ref: 'TS29122_CommonData.yaml#/components/responses/308'
        '400':
          $ref: 'TS29122_CommonData.yaml#/components/responses/400'
        '401':
          $ref: 'TS29122_CommonData.yaml#/components/responses/401'
        '403':
          description: >
            The request is rejected by the NEF and more details (along with ProblemDetails) may be
            returned.
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ProblemDetailsTmgiAlloc'
        '404':
          $ref: 'TS29122_CommonData.yaml#/components/responses/404'
        '411':
          $ref: 'TS29122_CommonData.yaml#/components/responses/411'
        '413':
          $ref: 'TS29122_CommonData.yaml#/components/responses/413'
        '415':
          $ref: 'TS29122_CommonData.yaml#/components/responses/415'
        '429':
          $ref: 'TS29122_CommonData.yaml#/components/responses/429'
        '500':
          $ref: 'TS29122_CommonData.yaml#/components/responses/500'
        '503':
          $ref: 'TS29122_CommonData.yaml#/components/responses/503'
        default:
          $ref: 'TS29122_CommonData.yaml#/components/responses/default'
      callbacks:
        TmgiTimerExpiryNotification:
          '{$request.body#/notificationUri}':
            post:
              requestBody:
                description: >
                  Represents the MBS TMGI(s) timer expiry notification information (e.g. list of
                  TMGI(s) for which the timer has expired).
                required: true
                content:
                  application/json:
                    schema:
                      $ref: '#/components/schemas/ExpiryNotif'
              responses:
                '204':
                  description: No content. The notification is successfully received.
                '307':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/307'
                '308':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/308'
                '400':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/400'
                '401':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/401'
                '403':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/403'
                '404':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/404'
                '411':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/411'
                '413':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/413'
                '415':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/415'
                '429':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/429'
                '500':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/500'
                '503':
                  $ref: 'TS29122_CommonData.yaml#/components/responses/503'
                default:
                  $ref: 'TS29122_CommonData.yaml#/components/responses/default'

  /deallocate:
    post:
      summary: Request the deallocation of MBS TMGI(s).
      operationId: DeallocateTmgi
      tags:
        - MBS TMGI Deallocation
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TmgiDeallocRequest'
      responses:
        '204':
          description: No Content. Successful case, the TMGI(s) are deallocated.
        '307':
          $ref: 'TS29122_CommonData.yaml#/components/responses/307'
        '308':
          $ref: 'TS29122_CommonData.yaml#/components/responses/308'
        '400':
          $ref: 'TS29122_CommonData.yaml#/components/responses/400'
        '401':
          $ref: 'TS29122_CommonData.yaml#/components/responses/401'
        '403':
          $ref: 'TS29122_CommonData.yaml#/components/responses/403'
        '404':
          $ref: 'TS29122_CommonData.yaml#/components/responses/404'
        '411':
          $ref: 'TS29122_CommonData.yaml#/components/responses/411'
        '413':
          $ref: 'TS29122_CommonData.yaml#/components/responses/413'
        '415':
          $ref: 'TS29122_CommonData.yaml#/components/responses/415'
        '429':
          $ref: 'TS29122_CommonData.yaml#/components/responses/429'
        '500':
          $ref: 'TS29122_CommonData.yaml#/components/responses/500'
        '503':
          $ref: 'TS29122_CommonData.yaml#/components/responses/503'
        default:
          $ref: 'TS29122_CommonData.yaml#/components/responses/default'


components:
  securitySchemes:
    oAuth2ClientCredentials:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: '{tokenUrl}'
          scopes: {}

  schemas: 
    TmgiAllocRequest:
      description: >
        Represents the full set of parameters to initiate an MBS TMGI(s) allocation request
        or the refresh of the expiry time of already allocated TMGI(s).
      type: object
      properties:
        afId:
          type: string
        tmgiParams:
          $ref: 'TS29532_Nmbsmf_TMGI.yaml#/components/schemas/TmgiAllocate'
        notificationUri:
          $ref: 'TS29122_CommonData.yaml#/components/schemas/Uri'
        mbsServiceArea:
          $ref: 'TS29571_CommonData.yaml#/components/schemas/MbsServiceArea'
        extMbsServiceArea:
          $ref: 'TS29571_CommonData.yaml#/components/schemas/ExternalMbsServiceArea'
        requestTestNotification:
          type: boolean
        websockNotifConfig:
          $ref: 'TS29122_CommonData.yaml#/components/schemas/WebsockNotifConfig'
        suppFeat:
          $ref: 'TS29571_CommonData.yaml#/components/schemas/SupportedFeatures'
      required:
        - afId
        - tmgiParams
      not:
        required: [mbsServiceArea, extMbsServiceArea]

    TmgiAllocResponse:
      description: >
        Represents MBS TMGI(s) allocation information or the refreshed expiry time for
        already allocated TMGI(s)
      type: object
      properties:
        tmgiInfo:
          $ref: 'TS29532_Nmbsmf_TMGI.yaml#/components/schemas/TmgiAllocated'
        suppFeat:
          $ref: 'TS29571_CommonData.yaml#/components/schemas/SupportedFeatures'
      required:
        - tmgiInfo

    TmgiDeallocRequest:
      description: Represents information to request the deallocation of MBS TMGI(s).
      type: object
      properties:
        afId:
          type: string
        tmgis:
          type: array
          items:
            $ref: 'TS29571_CommonData.yaml#/components/schemas/Tmgi'
          minItems: 1
      required:
        - afId
        - tmgis

    ExpiryNotif:
      description: Represents MBS TMGI(s) timer expiry notification information.
      type: object
      properties:
        tmgis:
          type: array
          items:
            $ref: 'TS29571_CommonData.yaml#/components/schemas/Tmgi'
          minItems: 1
      required:
        - tmgis

    ReducedMbsServArea:
      description: >
        Represents the reduced MBS Service Area information.
      type: object
      properties:
        reducedMbsServArea:
          $ref: 'TS29571_CommonData.yaml#/components/schemas/MbsServiceArea'
        reducedExtMbsServArea:
          $ref: 'TS29571_CommonData.yaml#/components/schemas/ExternalMbsServiceArea'
        reducedMbsServAreas:
          type: array
          items:
            $ref: 'TS29571_CommonData.yaml#/components/schemas/MbsServiceArea'
          minItems: 1
        reducedExtMbsServAreas:
          type: array
          items:
            $ref: 'TS29571_CommonData.yaml#/components/schemas/ExternalMbsServiceArea'
          minItems: 1
      oneOf:
        - required: [reducedMbsServArea]
        - required: [reducedExtMbsServArea]
      allOf:
        - not:
            required: [reducedMbsServArea, reducedExtMbsServAreas]
        - not:
            required: [reducedExtMbsServArea, reducedMbsServAreas]

    ProblemDetailsTmgiAlloc:
      description: >
        Represents an extension to the ProblemDetails data structure with additional error
        information related to TMGI Allocation.
      allOf:
        - $ref: 'TS29122_CommonData.yaml#/components/schemas/ProblemDetails'
        - $ref: '#/components/schemas/ReducedMbsServArea'