| CPC H04W 12/068 (2021.01) [H04W 4/12 (2013.01); H04W 60/04 (2013.01); H04W 60/06 (2013.01)] | 14 Claims |

|
1. A method for communicating with a message in fifth generation (MSGin5G) server by a first user equipment (UE), the method comprising:
receiving, by the first UE from a second UE, a registration request comprising a security credential required for the second UE to register to the MSGin5G server; and
transmitting, to the second UE, a registration response indicating success or failure of a registration performed by the first UE for the second UE based on the registration request,
wherein the first UE is a constrained device or an unconstrained device with advanced capabilities, and the first UE communicates with the MSGin5G server over MSGin5G-1 reference point, and
wherein the second UE is a constrained device not having a capability to communicate with the MSGin5G Server.
|