Annex B (normative): Multicast group fan out procedure

B.0 Introduction

This clause describes the behaviour of CoAP layer for multicast group fan out procedure. Figure B.0‑1 illustrates the steps involved in the interaction.

Figure B.0-1: Multicast group fan out procedureFigure B.0-1: Multicast group fan out procedure
Figure B.0‑1: Multicast group fan out procedure

Figure B.0‑1: Multicast group fan out procedure

  • The Group Hosting CSE (CoAP client) shall use the Non-confirmable Method for the resource to the Member Hosting CSEs (CoAP server). The Group Hosting CSE shall provide a unique Token value in the request.
  • The Member Hosting CSE, upon successful processing of the request, shall send an appropriate response in a separate Non-confirmable message with the same Token value.

B.1 Security

DTLS is not applicable to multicast group fan out messages. Security for multicast group fan out is addressed in clause 6.1.2.2.3 of oneM2M TS-0003 [4].