Dynamic UE Capability Reporting for Dual-SIM Resource Allocation
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Solution Overview
Problem
5G NR user equipment (UE) may temporarily reduce its capabilities due to dual-SIM operations, leading to inefficient resource allocation by base stations unaware of the limited or suspended connections.
Innovation Solution
The UE is configured to determine an upcoming state change and transmit an indication to the network, allowing the network to adjust resource allocation based on the UE's state changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE temporarily reduces its capabilities to conserve resources during dual-SIM operations, then power consumption is reduced and multi-network support is enabled, but the base station becomes unaware of the limited connection state and allocates resources inefficiently
Solution Approach 1:
The UE provides feedback to the base station about its capability state changes by transmitting indicators (e.g., suspend indicator, resume indicator, capability indicator) that inform the network when the UE enters or exits limited capability states. This feedback mechanism enables the base station to adjust resource allocation dynamically, preventing wasted resources during tune-away periods while maintaining efficient utilization when the UE is fully operational.
Solution Approach 2:
The UE transmits capability indicators to the base station before actually transitioning to a limited capability state (upcoming capability change indication). This preliminary notification allows the base station to proactively adjust resource allocation and scheduling decisions in advance, ensuring that resources are not allocated during periods when the UE will be unavailable, thereby improving overall resource utilization efficiency.
2Adaptability or versatility
If the UE maintains simultaneous connection to multiple RANs, then network versatility and service availability are improved, but the UE must periodically tune away from one connection to monitor another, causing connection interruptions
Solution Approach 1:
The UE uses suspend and resume indicators to inform the base station about its connection state transitions. When the UE needs to tune away to monitor another network, it transmits a suspend indicator to pause data transmission on the current connection. Upon returning, it sends a resume indicator to reestablish the connection. This feedback mechanism maintains connection reliability by ensuring the base station is aware of temporary disconnections and can manage resource allocation accordingly.
Solution Approach 2:
The UE dynamically adjusts its connection state by transitioning between active, suspended, and resumed states based on its need to monitor multiple networks. The capability indicators allow the UE to flexibly manage its radio resources, enabling it to switch between full capability mode and limited capability mode as needed for dual-SIM operations, thereby maintaining both versatility and connection stability.
3Device complexity
If the base station allocates resources without knowledge of UE capability changes, then resource allocation simplicity is maintained, but resource utilization efficiency deteriorates due to allocations during UE tune-away periods
Solution Approach 1:
The base station receives capability indicators from the UE that provide real-time information about the UE's operational state. Based on this feedback, the base station adjusts its resource allocation strategy - reducing or pausing allocations when the UE indicates it is in a limited capability state, and resuming normal allocations when the UE returns to full capability. This feedback-driven approach improves resource utilization without significantly increasing base station complexity.
Solution Approach 2:
The base station modifies its resource allocation parameters based on the capability indicators received from the UE. When the UE transmits an indicator indicating limited capability, the base station changes allocation parameters such as scheduling intervals, resource block assignments, and transmission power levels to match the UE's current operational constraints. This dynamic parameter adjustment optimizes resource utilization efficiency while maintaining manageable base station complexity.
Data Source
AI summary
A device, system and method for a user equipment (UE) to report a network resource and capability state to a network for coordinating network resource allocations. The UE is configured to establish a first connection to a first network based on a first subscriber identity module (SIM) of the UE and further configured to establish a second connection to a second network based on a second SIM of the UE. The method includes determining an upcoming first change of a state of the UE with respect to the first connection and transmitting, to the first network, an indication of the first change of state of the UE. The method further includes changing the state of the UE with respect to the first connection.