Content for TS 23.434 Word version: 19.0.0

0… 4… 5 6… 6.4… 6.5… 6.5.3… 7… 8… 8.2.2… 9… 9.3… 9.3.2.21… 9.3.3… 9.3.6… 9.3.11… 9.3.13… 9.3.14… 9.4… 9.4.6… 9.5… 10… 10.3… 10.3.2.22… 10.3.3… 10.3.7… 10.3.10… 10.4… 11… 11.3… 11.3.3… 11.4… 12… 12.3… 13… 14… 14.2.2.2… 14.3… 14.3.2.20… 14.3.2.40… 14.3.3… 14.3.3.3… 14.3.4… 14.3.4.6 14.3.4.7… 14.3.4A… 14.3.4A.3… 14.3.4A.4… 14.3.4A.6… 14.3.4A.8… 14.3.4A.9… 14.3.4A.10… 14.3.5… 14.3.6… 14.3.9… 14.3.12… 14.4… 15… 16… 17… 18… A B…

C.1 General C.2 Usage of CoAP as LWP

B SEAL functional model mapping with Common functional architecture (CFA) p. 292

The Table B-1 shows the mapping between the SEAL functional model and the Common functional architecture (CFA). The details of CFA functional entities and reference points are specified in TS 23.280.

Table B-1: SEAL functional model mapping with CFA

SEAL service	Aspects	SEAL	CFA
Location management	Functional entity	Location management client	Location management client
	Functional entity	Location management server	Location management server
	Reference points	LM-UU	CSC-14
		LM-S	CSC-15
		LM-C	Not defined
		LM-E	Not defined
		LM-PC5	Not defined
Group management	Functional entity	Group management client	Group management client
	Functional entity	Group management server	Group management server
	Reference points	GM-UU	CSC-2
		GM-S	CSC-3
		GM-C	Not defined
		GM-E	CSC-16
		GM-PC5	CSC-12
Configuration management	Functional entity	Configuration management client	Configuration management client
	Functional entity	Configuration management server	Configuration management server
	Reference points	CM-UU	CSC-4
		CM-S	CSC-5
		CM-C	Not defined
		CM-E	CSC-17
		CM-PC5	CSC-11
Identity management	Functional entity	Identity management client	Identity management client
	Functional entity	Identity management server	Identity management server
	Reference points	IM-UU	CSC-1
		IM-S	Not defined
		IM-C	Not defined
		IM-E	Not defined
		IM-PC5	Not defined
Key management	Functional entity	Key management client	Key management client
	Functional entity	Key management server	Key management server
	Reference points	KM-UU	CSC-8
		KM-S	CSC-9
		KM-PC5	Not defined
Network resource management	Functional entity	Network resource management client	Not defined (see NOTE)
	Functional entity	Network resource management server	Not defined (see NOTE)
	Reference points	NRM-UU	Not defined (see NOTE)
		NRM-S	Not defined
		NRM-C	Not defined
		NRM-E	Not defined
		NRM-PC5	Not defined
NOTE: Defined in the application layer for Mission Critical service (e.g. MCPTT).

C (Normative) Protocol realizations of LWP in the signalling control plane |R17| p. 293

C.1 General p. 293

This Annex specifies protocol realizations of the light-weight protocol in the signalling control plane.

C.2 Usage of CoAP as LWP p. 293

This clause specifies how the CoAP protocol shall be used to realize the generic light-weight protocol in the signalling control plane.

The Constrained Application Protocol (CoAP) is a light-weight protocol defined by IETF in RFC 7252 and designed specifically for application layer communication for constrained devices. CoAP provides a request/response interaction model between application endpoints, supports built-in discovery of services and resources, and includes key concepts of the Web such as URIs and Internet media types. CoAP is designed to easily interface with HTTP for integration with the Web while meeting specialized requirements such as multicast support, very low overhead, and simplicity for constrained environments. RFC 7252 specifies bindings to UDP and DTLS. RFC 8323 specifies bindings to TCP, WebSocket and TLS.

Figure C.2-1 illustrates the functional model for the LWP signalling control plane when CoAP is used as the LWP.

Reproduction of 3GPP TS 23.434, Fig. C.2-1: Functional model for LWP signalling control plane when CoAP is used as LWP

Figure C.2-1: Functional model for LWP signalling control plane when CoAP is used as LWP

When CoAP is used to realize the generic light-weight protocol defined in clause 6.2, then,

CoAP client is a realization of the LWP client
CoAP proxy is a realization of the LWP proxy, with the following clarifications:
1. CoAP proxy shall be able to terminate a DTLS, TLS or secure WebSocket session on LWP-1 reference point;
2. CoAP proxy shall be able to act as a cross-protocol CoAP-HTTP proxy to support LWP-HTTP-2 and LWP-HTTP-3 reference points;
CoAP server is a realization of the LWP server
CoAP supports the interactions over LWP-1, LWP-2 and LWP-3 reference points
The usage of CoAP by the SEAL service enablers shall follow the rules set out in clause 6.4.3.5.

D Exemplary location profile attributes |R18| p. 294

The Table D-1 shows the example of attributes that can be used for the location profiles.

Table D-1: Exemplary location profile attributes