Description

UCE shim service UCE = User Capability Exchange. A shim is basically a compatibility layer for an API, that makes sure anything that uses the API does so correctly. Used for RCS. Provides a discovery service for users to see the capabilities of other users. UCE is based on SIP PUBLISH and SIP SUBSCRIBE/NOTIFY. Devices PUBLISH their capabilities to a presence server, when another device wants to find out what the other party supports, the device sends a SUBSCRIBE to the presence server which then returns a NOTIFY of what the other party supports. https://fr.wikipedia.org/wiki/Session_Initiation_Protocol