Uplink Preemption Handling for Carrier Aggregation Reliability
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Solution Overview
Problem
Existing wireless communication systems, particularly in NR and LTE, face challenges in managing uplink preemption due to differing latency and reliability requirements of various services, leading to inefficient resource allocation and interference.
Innovation Solution
Implementing methods and apparatus for uplink preemption handling in systems supporting carrier aggregation and multi-connectivity modes, allowing UEs and BSs to dynamically adjust resource allocation based on preemption indications and capabilities, ensuring seamless transmission on remaining resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink preemption is implemented to meet different latency requirements, then service reliability is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent segments the uplink transmission resources into different sets based on service types (first set for first services, second set for second services). This segmentation allows different services to have dedicated resource pools, enabling preemption to occur only within specific segments rather than across all resources, thus maintaining reliability for critical services while preserving allocation efficiency for others.
Solution Approach 2:
The patent applies local quality by treating different resource sets differently based on their associated service characteristics. Each resource set has customized preemption handling rules tailored to its service type, allowing optimized preemption behavior for each local region (service category) rather than applying a uniform approach across all uplink resources.
2Adaptability or versatility
If dynamic resource allocation is implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple resource sets with different service types and their corresponding preemption handling rules before actual transmission occurs. This advance preparation enables the system to adapt to different service requirements without complex real-time decision-making, reducing device complexity while maintaining high adaptability.
Solution Approach 2:
The patent introduces dynamics by enabling flexible configuration of resource sets and their associated preemption parameters. The system can dynamically adjust which resource sets are activated and their specific preemption behaviors based on current service demands, providing adaptability while using standardized dynamic mechanisms that control complexity growth.
Data Source
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AI summary
Certain aspects of the present disclosure relate to uplink preemption in certain systems, such as new radio (NR) systems, supporting carrier aggregation (CA) and/or multi-connectivity modes. A method for wireless communication, that can be performed by a user equipment (UE), generally includes receiving a resource assignment scheduling the UE for uplink transmission. The UE receives an indication to preempt uplink transmission on a portion of the assigned resources and determines whether to transmit on the remaining assigned resources. A method that can be performed by a base station (BS) generally includes receiving an indication from one or more UEs indicating, for each of a plurality of band combinations, a capability of the UE to transmit on a band when transmission on another band in the band combination is preempted and scheduling the one or more UEs for uplink transmission based on the indication.