Service Capabilities Exchange via Fallback Signaling
Solution Overview
Problem
Current Rich Communication Services (RCS) systems lack a mechanism for users to discover and exchange service capabilities between UEs without prior authorization, leading to restricted service visibility and potential delays in service adoption due to privacy settings.
Innovation Solution
A method involving a first UE requesting service capabilities using a primary signaling protocol, and upon rejection, sending a service capabilities exchange invitation via a secondary signaling protocol unaffected by authorization rules, allowing the exchange of service capabilities even if the first user is not authorized, using protocols like SMS or MMS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If service capabilities exchange is restricted by authorization rules to protect user privacy, then user privacy is protected, but service discovery and adoption are delayed
Solution Approach 1:
The patent introduces an intermediary mechanism (alternative signaling protocol) that mediates between privacy protection requirements and service discovery needs. The first UE uses this intermediary channel to send service capabilities exchange invitations to the second UE, bypassing the authorization restrictions of the primary protocol while still enabling controlled service discovery.
Solution Approach 2:
The patent segments the service capabilities exchange process into two distinct phases: (1) an initial phase using the primary signaling protocol subject to authorization rules, and (2) a fallback phase using an alternative signaling protocol when authorization is denied. This segmentation allows the system to maintain privacy protection while providing a path for service discovery.
2Ease of operation
If a primary signaling protocol is used for service capabilities exchange, then service exchange can occur between authorized users, but service exchange is blocked for unauthorized users
Solution Approach 1:
The patent implements a dynamic protocol selection mechanism where the system transitions from using only the primary signaling protocol to conditionally using an alternative signaling protocol based on authorization outcomes. This dynamic adaptation enables the system to adjust its behavior based on real-time authorization status, improving both service exchange capability and service visibility.
Solution Approach 2:
The patent changes the protocol parameter (signaling protocol type) based on the authorization result. When the primary protocol fails due to authorization restrictions, the system switches to an alternative protocol with different authorization characteristics, thereby changing the system's behavior to achieve service exchange while respecting privacy settings.
3Ease of operation
If privacy settings limit service capability visibility to authorized users only, then user control over information sharing is maintained, but potential service users cannot discover available services
Solution Approach 1:
The alternative signaling protocol serves as an intermediary channel that allows service capability information to be shared with potential service users who are not yet in the authorized list. This intermediary mechanism enables information flow while maintaining the user's control over formal authorization status.
Solution Approach 2:
The patent enables preliminary service capability exchange through the alternative signaling protocol before formal authorization is established. This preliminary action allows potential users to discover and express interest in services before being added to the authorized users list, facilitating smoother service adoption.
Data Source
AI summary
A method performed by a first UE. The method includes: the first UE sending via a first signaling protocol to a network node a service capabilities request, the service capabilities request requesting service capability information for a second UE; the first UE receiving from the network node a response to the service capabilities request, the response rejecting the service capabilities request; and as a result of receiving the response rejecting the service capabilities request, the first UE sending to the second UE, via a second signaling protocol other than the first signaling protocol, a service capabilities exchange invitation requesting an exchange of service capabilities.