Single-Link DSDA RRC Reconfiguration with Shared Common Signaling
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Solution Overview
Problem
Existing dual-SIM (DSDA) wireless communication systems face inefficiencies in radio resource control (RRC) configuration procedures, leading to significant network bandwidth consumption and user latency, with little progress made in enhancing these procedures for dual-SIM configurations.
Innovation Solution
The RRC configurations are partitioned into common and separable configurations, with common configurations being applied only over the first RRC connection, indicated by a flag, thereby reducing redundant network messages and streamlining dual-SIM operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate RRC configurations are applied to both SIMs independently, then each SIM receives complete configuration information, but network bandwidth consumption increases and latency is introduced
Solution Approach 1:
The RRC configuration is segmented into common configuration parameters (applicable to both SIMs) and SIM-specific configuration parameters. The common configuration is transmitted once and applied to both SIMs, while SIM-specific configurations are transmitted separately. This segmentation reduces redundant network transmissions while ensuring each SIM receives its complete required configuration.
Solution Approach 2:
The patent implements a universal configuration transmission mechanism where a single RRC configuration message can serve multiple SIMs simultaneously. The base station transmits common configuration parameters that are universally applicable to both SIMs, eliminating the need for separate transmissions and reducing network bandwidth consumption while maintaining configuration completeness for each SIM.
2Reliability
If separate RRC configurations are applied to both SIMs independently, then each SIM receives complete configuration information, but user latency increases
Solution Approach 1:
By segmenting the configuration into common and SIM-specific parts, the patent enables parallel processing where the common configuration is applied to both SIMs simultaneously through a single transmission, reducing the time required compared to sequential separate transmissions while maintaining complete configuration for each SIM.
Solution Approach 2:
The base station performs preliminary identification of common configuration parameters before transmission, preparing the configuration message in advance to be applied to multiple SIMs. This preliminary action reduces the overall configuration time by avoiding redundant transmission and processing steps that would otherwise increase user latency.
3Loss of energy
If common RRC configurations are applied to both SIMs through a single connection, then network bandwidth consumption is reduced, but configuration complexity increases
Solution Approach 1:
The configuration message is segmented with clear identification of common parameters versus SIM-specific parameters. The UE's RRC module segments the received configuration and applies common parameters to both SIMs while handling SIM-specific parameters separately. This structured segmentation manages complexity by providing clear separation and handling logic rather than creating unmanageable complexity.
Solution Approach 2:
The patent introduces an intermediary RRC configuration management mechanism that mediates between the base station's single transmission and the dual-SIM configuration requirements. The intermediary module in the UE receives the common configuration, identifies applicable parameters, and distributes them appropriately to both SIMs, managing the complexity internally while presenting a simplified interface to the network.
4Ease of manufacture
If existing single-SIM RRC procedures are used for dual-SIM devices, then implementation is straightforward, but dual-SIM operations become inoperable or inefficient
Solution Approach 1:
The patent modifies existing single-SIM RRC procedures to achieve multi-functionality, enabling the same RRC connection and configuration mechanisms to serve both SIMs effectively. By making the RRC configuration system universal, it can handle both single-SIM and dual-SIM operations, maintaining implementation simplicity while achieving dual-SIM operational capability through the common configuration transmission mechanism.
Solution Approach 2:
The RRC configuration system is made dynamic to adapt between single-SIM and dual-SIM modes. The base station dynamically determines whether to transmit common configurations or separate configurations based on the device's SIM status, and the UE dynamically processes configurations appropriately. This dynamic adaptation maintains ease of implementation while enabling versatile dual-SIM operation.
Data Source
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Figure 2A~2D
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AI summary
A Single-Link DSDA apparatus is disclosed. In one aspect of the disclosure, the RRC connections associated with two SIMS have common connections that can both be reconfigured by providing one SIM with the configuration for its RRC connection along with an indication that the other SIM is to use the common configuration for its RRC configuration. In other aspects of the disclosure, a primary SIM is established which can only perform certain tasks. In still other aspects of the disclosure RRC connection establishment and release of a dual-SIM UE can be performed by using on the primary connection to send common configuration, and using both connection for different configurations.