RCS Interworking Function for Pre-UP and UP Client Communication
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Solution Overview
Problem
Interoperability issues exist between Pre-Universal Profile (Pre-UP) and Universal Profile (UP) clients in Rich Communication Services (RCS) due to different implementations of RCS services, leading to challenges in communication and service compatibility.
Innovation Solution
The implementation of an Interworking Function (IWF) that includes a Session Initiation Protocol (SIP) Application Server and a Message Session Relay Protocol (MSRP) Server, enabling protocol translation and message mediation between Pre-UP and UP clients for various RCS services such as messaging, file transfer, and group chat, by establishing necessary servers and servers for each service type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Pre-UP and UP clients use different RCS service implementations, then each client type can maintain its own service features, but interoperability between the two client types deteriorates
Solution Approach 1:
The patent introduces an Interworking Function (IWF) as an intermediary system between Pre-UP and UP clients. The IWF includes a SIP Application Server and MSRP Server that perform protocol translation and message mediation, allowing clients with different RCS implementations to communicate seamlessly while maintaining their native service features.
2Reliability
If protocol translation and message mediation are performed between Pre-UP and UP clients, then interoperability is improved, but system complexity increases
Solution Approach 1:
The Interworking Function is segmented into distinct components: a SIP Application Server for protocol translation and a MSRP Server for message mediation. This segmentation allows each component to handle specific translation tasks independently, making the overall system more manageable and maintainable despite the added complexity.
3Reliability
If SIP Application Server translates SIP MESSAGE to SIP INVITE for messaging interworking, then messaging compatibility is improved, but translation processing time increases
Solution Approach 1:
The SIP Application Server performs preliminary protocol translation actions by maintaining translation rules and message templates in advance. Common messaging patterns are pre-configured with their translation mappings, allowing the server to quickly translate SIP MESSAGE to SIP INVITE without extensive real-time processing.
Data Source
AI summary
This invention is a system and method for an interworking function that handles communications between Rich Communication Services (RCS) Pre-Universal Profile (Pre-UP) and Universal Profile (UP) clients, and their Controlling Function and Participating Function service points. The interworking function supports the interworking for Pre-UP and UP clients in the following scenarios: 1) CPM Standalone Messaging and CPM 1-to-1 Chat, 2) CPM Chat and IM/SIMPLE Chat, 3) File Transfer by MSRP and File Transfer by HTTP, and 4) Open Group Chat and Closed Group Chat. The interworking function performs the necessary SIP message conversation and/or headers and message bodies manipulation, acts as MSRP client and server, acts as a HTTP server to store file for file transfer interworking, and acts as message proxy for Controlling Function and Participating Function.