In-Device Hotspot Sharing for Multi-SIM RCS Availability
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Solution Overview
Problem
Existing protocols and network configurations do not allow for simultaneous availing of Rich Communication Services (RCS) on multiple SIMs in a user equipment (UE) operating in multi-SIM-multi-standby (MSMS) mode, due to hardware and implementation restraints.
Innovation Solution
A method and system for managing communications in user equipment with multiple SIMs, where an in-device hotspot is used to enable any SIM to access network services available on another SIM, allowing data transfer even when the primary SIM's network service is unavailable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE operates in MSMS mode with a single radio shared among multiple SIMs, then power consumption is reduced and device complexity is lowered, but RCS services cannot be simultaneously availed on multiple SIMs due to network service unavailability
Solution Approach 1:
The patent introduces an intermediary mechanism (hotspot sharing and network service sharing protocols) that enables SIM1 to access network services through SIM2's established connection. This intermediary approach allows RCS services to be available on multiple SIMs without requiring each SIM to independently establish network connections, thus maintaining MSMS mode simplicity while enabling multi-SIM RCS functionality.
2Adaptability or versatility
If network service is shared between multiple SIMs in MSMS mode, then RCS services become accessible on all SIMs, but traffic may be dropped by networks due to non-trusted RCS signaling and Media flows
Solution Approach 1:
The patent implements preliminary actions by establishing network service sharing agreements and configuring trusted signaling paths before RCS traffic is generated. The system pre-configures the network paths and signaling protocols to ensure that when RCS traffic flows through the shared network service, it is recognized as trusted and not dropped by the network.
3Adaptability or versatility
If multiple radios are used in MSMA mode to support simultaneous RCS on multiple SIMs, then RCS service availability improves, but power consumption and device complexity increase significantly
Solution Approach 1:
The patent applies universality by enabling a single radio and network service to serve multiple SIMs for RCS communications. Instead of requiring separate radios for each SIM, the system makes the network service universal across all SIMs, allowing any SIM to access RCS services through the shared network connection, thereby reducing power consumption while maintaining service availability.
4Adaptability or versatility
If network protocols are updated to support simultaneous RCS on multiple SIMs in MSMS mode, then service availability improves, but implementation cost and network changes required increase
Solution Approach 1:
The patent implements partial action by introducing network service sharing only for RCS traffic while leaving other network services operating independently for each SIM. This selective approach enables multi-SIM RCS support without requiring comprehensive protocol updates across the entire network infrastructure, reducing implementation complexity and cost.
Data Source
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AI summary
A method for managing communication in a user equipment with a plurality of subscriber identity modules (SIM), the method includes detecting that a network service is unavailable to a first SIM from a plurality of SIMs and is available to a second SIM from the plurality of SIMs; detecting availability of an in-device hotspot; and providing to the first SIM an access to the in-device hotspot for using the network service available to the second SIM for sending data to a network.