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Content for  TS 24.257  Word version:  18.3.0

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1…   6…   6.3…   6.4…   6.7…   6.8…   6.9…   7… 
1 Scope  2 References  3 Definitions of terms, symbols and abbreviations  3.1 Terms  3.2 Abbreviations  4 General description  5 SEAL services 
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1  Scope  p. 6

The present document specifies the protocols for application layer support for UAS services as specified in TS 23.255 for:
  1. UAS application communication between the UE and the UAE server (over the U1-AE interface); and
  2. UAS application communication among UEs (over the U1-AE interface using unicast Uu).
The present specification defines the associated procedures for UAS application communication between the UE and the UAE server and among UEs.
The present specification defines the usage and interactions of the UAE layer with SEAL services.
The present specification also defines the message format, message contents, error handling and system parameters applied by the protocols for the UAE layer.
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2  References  p. 6

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 23.255: "Application layer support for Unmanned Aerial System (UAS); Functional architecture and information flows".
[3]
TS 23.256: "Support of Uncrewed Aerial Systems (UAS) connectivity, identification, and tracking; Stage 2".
[4]
TS 23.434: "Service Enabler Architecture Layer for Verticals (SEAL); Functional architecture and information flows".
[5]
RFC 9110:  "HTTP Semantics".
[6]
TS 24.544: "Group Management - Service Enabler Architecture Layer for Verticals (SEAL); Protocol specification".
[7]
TS 24.545: "Location Management - Service Enabler Architecture Layer for Verticals (SEAL); Protocol specification".
[8]
TS 24.546: "Configuration Management - Service Enabler Architecture Layer for Verticals (SEAL); Protocol specification".
[9]
TS 24.547: "Identity Management - Service Enabler Architecture Layer for Verticals (SEAL); Protocol specification".
[10]
TS 24.548: "Network Resource Management - Service Enabler Architecture Layer for Verticals (SEAL); Protocol specification".
[11]
TS 23.032: "Universal Geographical Area Description (GAD)".
[12]
TS 24.543: "Data Delivery Management - Service Enabler Architecture Layer for Verticals (SEAL); Protocol specification".
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3  Definitions of terms, symbols and abbreviations  p. 7

3.1  Terms  p. 7

For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
UAV identifier (UAV ID):
An unique identifier of a UAV. The UAV ID is in the form of a 3GPP UE ID (e.g. GPSI, External Identifier) or CAA level UAV ID as assigned by civil aviation authorities (e.g. FAA) via USS/UTM.
For the purposes of the present document, the following terms and definitions given in TS 23.255 apply:
UAV
UAS Service Supplier (USS)
For the purposes of the present document, the following terms and definitions given in TS 23.256 apply:
Command and Control (C2) Communication
Uncrewed Aerial System (UAS)
UAS Traffic Management (UTM)
UAS Services
For the purposes of the present document, the following terms and definitions given in TS 23.434 apply:
SEAL service
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3.2  Abbreviations  p. 7

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
C2
Command and Control
DAA
Detect And Avoid
GPSI
Generic Public Subscription Identifier
LMS
Location Management Server
SCM-S
SEAL Configuration Management Server
SEAL
Service Enabler Architecture Layer for Verticals
SEALDD
SEAL Data Delivery
SLM-S
SEAL Location Management Server
UAE
UAS Application Enabler
UAS
Uncrewed Arial System
UAV
Uncrewed Aerial Vehicle
UAV-C
Unmanned Aerial Vehicle-Controller
USS
UAS Service Supplier
UTM
UAS Traffic Management
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4  General description  p. 8

The UE can contain a UAE client (UAE-C). The UAE-C and the UAE server (UAE-S) are located in the UAE layer. The UAE layer can offer the UAE capabilities to the UAS application specific layer. The UAE layer can utilize SEAL services provided by SEAL, which may include location management, group management, configuration management, identity management, key management and network resource management (see TS 23.434).
The UAE-C communicates with the UAE-S over the U1-AE interface (see TS 23.255). Furthermore, the UAE-C of a UE can communicate with the UAE-C of another UE over unicast Uu interface (including LTE-Uu or NG-RAN-Uu) (see TS 23.255). Both the UAE-C and the UAE-S can act as an HTTP client or an HTTP server (see RFC 9110). The HTTP protocol interactions are described in detail in clause 6.
By means of using the U1-AE interface:
  1. Communications between UAVs within a geographical area using unicast Uu can be provided as defined by clause 6.2;
  2. C2 communication mode selection and switching can be provided as defined by clause 6.3;
  3. UAS UE registration can be provided as defined by clause 6.4;
  4. UAS UE de-registration can be provided as defined by clause 6.5;
  5. UAS UE registration update can be provided as defined by clause 6.6;
  6. Change of USS during flight can be provided as defined by clause 6.7;
  7. DAA support can be provided as defined by clause 6.8; and
  8. Tracking dynamic UAVs in an application defined area relative to a host UAV as defined by clause 6.9.
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5  SEAL services  p. 8

The UAE layer can utilize following SEAL services to support UAS services:
  1. group management as specified in TS 24.544;
  2. location management as specified in TS 24.545;
  3. configuration management as specified in TS 24.546;
  4. identity management as specified in TS 24.547;
  5. network resource management as specified in TS 24.548; and
  6. data delivery management as specified in TS 24.543.
Interactions between the UAE layer and the SEAL services are described in detail in clause 6.
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