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Content for  TS 23.542  Word version:  18.4.0

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8.5.12 PIN heartbeat  8.5.12.1 General  8.5.12.2 Procedure  8.5.12.2.1 PIN heartbeat  8.5.12.3 Information flows  8.5.12.3.1 General  8.5.12.3.2 PIN heartbeat 
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8.5.12  PIN heartbeat  p. 78

8.5.12.1  General  p. 78

Periodic PIN heartbeats are sent by PINE(s) and PEGC(s) to the PEMC. These heartbeats are used by the PEMC to keep track of the availability of PINE(s) and PEGC(s) and detect if/when they are no longer available within the PIN. Likewise, periodic heartbeats are also sent by the PEMC to the PIN server to allow the PIN server to detect if/when the PEMC is no longer available.

8.5.12.2  Procedure  p. 78

8.5.12.2.1  PIN heartbeat  p. 78
Figure 8.5.12.2.1-1 illustrates the PIN heartbeat procedure.
Pre-conditions:
  1. The PIN is successfully created and in use.
  2. The PIN Server/PEMC and each PINE/PEGC/PEMC have set periodic timers corresponding to the heartbeat timer values respectively sent or received.
Reproduction of 3GPP TS 23.542, Fig. 8.5.12.2.1-1: PIN heartbeat procedure
Figure 8.5.12.2.1-1: PIN heartbeat procedure
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Step 1.
Before the periodic heartbeat timer at the PINE/PEGC/PEMC expires, the PINE/PEGC/PEMC triggers the sending of a PIN heartbeat.
Step 2.
The PINE/PEGC/PEMC sends a PIN heartbeat to either the PEMC (in the case of a PINE/PEGC) or PIN server (in the case of a PEMC). The PIN heartbeat includes the identifier of the PINE/PEGC/PEMC.
Step 3.
Upon receiving the PIN heartbeat, the PIN Server/PEMC updates the availability of the PINE/PEGC/PEMC.
If the periodic heartbeat timer expires at the PIN server/PEMC without receiving a PIN heartbeat message from the PINE/PEGC/PEMC, the PIN server/PEMC determines that PINE/PEGC/PEMC is not available.
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8.5.12.3  Information flows  p. 80

8.5.12.3.1  General  p. 80
The PIN heartbeat information flow is specified for the PIN heartbeat.
8.5.12.3.2  PIN heartbeat  p. 80
Information element Status Description
PIN client IDMUnique identifier of the PINE/PEGC/PEMC.
PIN IDMIdentifier of the PIN.

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