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Content for  TS 23.434  Word version:  18.0.0

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9  Location managementWord‑p. 40

9.1  GeneralWord‑p. 40

The location management is a SEAL service that offers the location management related capabilities to one or more vertical applications.

9.2  Functional model for location managementWord‑p. 40

9.2.1  GeneralWord‑p. 40

The functional model for the location management is based on the generic functional model specified in clause 6. It is organized into functional entities to describe a functional architecture which addresses the support for location management aspects for vertical applications. The on-network and off-network functional model is specified in this clause.

9.2.2  On-network functional model descriptionWord‑p. 40

Figure 9.2.2-1 illustrates the generic on-network functional model for location management.
Reproduction of 3GPP TS 23.434, Fig. 9.2.2-1: On-network functional model for location management
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The location management client communicates with the location management server over the LM-UU reference point. The location management client provides the support for location management functions to the VAL client(s) over LM C reference point. The VAL server(s) communicate with the location management server over the LM-S reference point.
The location management server communicates with the SCEF via T8 reference point to obtain location information from the underlying 3GPP network system. The location management server obtains location information from the NEF via N33 reference point by mechanism defined in clause 5.2.6.2 of TS 23.502.
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9.2.3  Off-network functional model descriptionWord‑p. 41

Figure 9.2.3-1 illustrates the off-network functional model for location management.
Reproduction of 3GPP TS 23.434, Fig. 9.2.3-1: Off-network functional model for location management
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The location management client of the UE1 communicates with the location management client of the UE2 over the LM-PC5 reference point.

9.2.4  Functional entities descriptionWord‑p. 41

9.2.4.1  GeneralWord‑p. 41

The functional entities for location management SEAL service are described in the following subclauses.

9.2.4.2  Location management clientWord‑p. 42

The location management client functional entity acts as the application client for location management functions. It interacts with the location management server. The location management client also supports interactions with the corresponding location management client between the two UEs.

9.2.4.3  Location management serverWord‑p. 42

The location management server is a functional entity that receives and stores user location information and provides user location information to the vertical application server. The location management server may also acquire location information provided by PLMN operator via T8 reference point. The location management server acts as CAPIF's API exposing function as specified in TS 23.222. The location management server also supports interactions with the corresponding location management server in distributed SEAL deployments.
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9.2.5  Reference points descriptionWord‑p. 42

9.2.5.1  GeneralWord‑p. 42

The reference points for the functional model for location management are described in the following subclauses.

9.2.5.2  LM-UUWord‑p. 42

The interactions related to location management functions between the location management client and the location management server are supported by LM-UU reference point. This reference point utilizes Uu reference point as described in TS 23.401 and TS 23.501.
LM-UU reference point provides a means for the location management server to receive location information report from the location management client. The LM-UU reference point shall use SIP-1 and SIP-2 reference points for subscription/notification related signalling. And for transport and routing of location management related signalling LM-UU reference point uses the HTTP-1 and HTTP-2 signalling control plane reference points.
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9.2.5.3  LM-PC5Word‑p. 42

The interactions related to location management functions between the location management clients located in different VAL UEs are supported by LM-PC5 reference point. This reference point utilizes PC5 reference point as described in TS 23.303.

9.2.5.4  LM-CWord‑p. 42

The interactions related to location management functions between the VAL client(s) and the location management client within a VAL UE are supported by LM-C reference point.

9.2.5.5  LM-SWord‑p. 42

The interactions related to location management functions between the VAL server(s) and the location management server are supported by LM-S reference point. This reference point is an instance of CAPIF-2 reference point as specified in TS 23.222.
LM-S reference point is used by the VAL server to request and receive location information from location management server. The LM-S reference point shall use SIP-1 and SIP-2 reference points for subscription/notification related signalling. And for transport and routing of location management related signalling LM-S reference point uses the HTTP-1 and HTTP-2 signalling control plane reference points.
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9.2.5.6  LM-EWord‑p. 42

The interactions related to location management functions between the location management servers in a distributed deployment are supported by LM-E reference point.

9.2.5.7  T8Word‑p. 43

The reference point T8 supports the interactions between the location management server and the SCEF and is specified in TS 23.682. The functions related to location management of T8 are supported by the location management server.

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