Dual SIM Paging Conflict Resolution via Network Mediator
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Solution Overview
Problem
Dual SIM dual standby mobile phones face a paging conflict issue due to overlapping paging occasions for the two SIM cards, leading to ineffective paging and potential failure of receiving paging messages.
Innovation Solution
A communication method and apparatus that allow a terminal device to send information indicating the association of multiple user identities to network side devices, enabling effective paging by receiving paging information using one user identity while the other user identity is in an idle or inactive state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two SIM cards share one transceiver and work in TDM mode, then device complexity is reduced, but paging reliability deteriorates due to paging conflicts
Solution Approach 1:
The patent introduces an intermediary mechanism where the first network side device acts as a mediator to forward paging information for the second user identity to the terminal device. This allows paging messages for both SIM cards to be received through a single transceiver configuration, resolving the paging conflict while maintaining dual SIM functionality.
Solution Approach 2:
The terminal device is configured to receive paging information for both user identities through a single transceiver and single cell monitoring. The first network side device forwards paging messages for the second user identity alongside normal paging for the first user identity, making the single transceiver universally functional for both SIM cards without requiring separate receivers.
2Productivity
If paging occasions of SIM A and SIM B overlap, then time resource utilization increases, but paging reliability deteriorates due to conflicts
Solution Approach 1:
When paging occasions overlap, the first network side device serves as an intermediary that receives paging information for the second user identity and forwards it to the terminal device through the first cell. This mediator approach allows both SIM cards to share the same time resources without conflict, as the network side coordinates the paging delivery.
Solution Approach 2:
The patent merges the paging reception functionality for both SIM cards into a single reception channel. The terminal device monitors only the first cell for paging information, and both paging messages (for first and second user identities) are delivered through this single channel, combining what would traditionally require separate monitoring channels.
3Reliability
If the terminal device monitors paging for both user identities in separate cells, then paging reliability improves, but device complexity increases
Solution Approach 1:
The single first cell is configured to serve multiple functions: it monitors paging for the first user identity directly and simultaneously receives forwarded paging information for the second user identity. This universal cell configuration eliminates the need for separate cell monitoring while maintaining reliable paging for both SIM cards.
Solution Approach 2:
The patent combines the paging monitoring functions for both user identities into a single cell monitoring operation. Instead of requiring the terminal device to monitor two separate cells, both paging messages are delivered through the first cell, merging the monitoring requirements into one unified process.
4Reliability
If frequent transceiver switching is performed between SIM cards, then paging coverage improves, but loss of time increases
Solution Approach 1:
The patent merges the paging reception for both SIM cards into a single continuous operation through one transceiver. The terminal device maintains a single connection state with the network and receives paging for both user identities through this persistent connection, eliminating the need to switch transceiver states between SIM cards.
Solution Approach 2:
The terminal device maintains continuous connection and paging monitoring through the first user identity, providing uninterrupted paging coverage. Instead of discontinuously switching between SIM cards, the system maintains continuous useful action by forwarding all paging messages through the active first user identity channel.
Data Source
AI summary
A communication method includes: a terminal device sends, to a network side device, information indicating that a first user identity of the terminal device and a second user identity of the terminal device are associated with the terminal device; and the terminal device receives, by using the first user identity, paging information corresponding to the second user identity of the terminal device. In the method, the terminal device receives a paging-related message or paging-related information in a cell corresponding to a single user identity, to monitor paging information of a plurality of user identities of the terminal device, so that the plurality of user identities of the terminal device can be effectively paged.