DAPS Handover Power Sharing via Uplink Cancellation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing power sharing during handover procedures in 5G networks, particularly when the power sharing modes indicated by user equipment (UE) and the source cell differ, leading to potential errors and performance issues.
Innovation Solution
The system allows the UE to transmit a capability indication for power sharing modes during dual active protocol stack (DAPS)-based handover, enabling it to cancel uplink transmissions to the source cell if overlapping with target cell transmissions, and to prioritize transmissions to the target cell, thus avoiding configuration errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE and source cell use different power sharing modes during DAPS-based handover, then configuration flexibility is improved, but system reliability deteriorates due to potential errors and performance issues
Solution Approach 1:
The UE feeds back its power sharing mode capability indication to the source cell. This feedback mechanism allows the source cell to understand the UE's capabilities and configure appropriate power sharing modes, ensuring both the source cell and UE operate with consistent power sharing mode configurations during handover, thus preventing errors while maintaining configuration flexibility
Solution Approach 2:
The UE transmits its power sharing mode capability indication before the handover process begins. This preliminary action allows the source cell to pre-configure the appropriate power sharing mode based on the UE's capabilities, ensuring that both the source cell and UE are aligned on the power sharing mode configuration before handover execution, thereby preventing configuration errors and improving reliability
2Productivity
If the UE cancels uplink transmission to the source cell during overlapping transmissions, then power management efficiency is improved, but transmission reliability to the source cell deteriorates
Solution Approach 1:
The UE dynamically adjusts its transmission behavior based on real-time conditions. When an uplink transmission to the target cell overlaps with a scheduled uplink transmission to the source cell, the UE cancels the source cell transmission. This dynamic adjustment allows efficient power management during handover while the capability indication mechanism ensures the source cell is aware of the UE's cancellation behavior, maintaining overall system reliability
3Ease of operation
If the UE indicates capability for cancelling uplink transmission, then ease of operation is improved, but device complexity increases due to additional capability management
Solution Approach 1:
The capability indication mechanism serves multiple functions: it informs the source cell of the UE's power sharing mode support, enables the source cell to configure appropriate power sharing modes, and allows the source cell to understand the UE's transmission cancellation behavior. By consolidating multiple information needs into a single capability indication, the patent reduces overall system complexity while improving ease of operation
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for cancelling transmissions during handover operations. In one aspect, a user equipment (UE) can cancel at least a portion of a first uplink transmission where the first uplink transmission overlaps with a second uplink transmission scheduled by a target cell in a dual active protocol stack (DAPS)-based handover (HO). In another aspect, a network can receive, from the UE, a capability indicating whether cancelling uplink transmission from a source cell in DAPS-based HO is supported, and the network can schedule an uplink transmission for the UE during the DAPS-based HO to the target cell based on the capability.