Multi-Carrier Preemption Indicator Signaling
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently signaling preemption information across multiple carriers, particularly in scenarios where ultra-reliable low-latency communications (URLLC) preempt enhanced mobile broadband (eMBB) transmissions, leading to decoding errors and increased complexity in managing resource preemption.
Innovation Solution
The system employs a method and apparatus for wireless communication that includes receiving preemption information in a downlink control channel, determining the availability of preemption on multiple carriers, and communicating with a base station based on variable-size preemption information, allowing for efficient identification and management of preempted resources across carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If preemption information is signaled for each carrier separately, then decoding accuracy is improved, but signaling overhead and message size increase
Solution Approach 1:
The patent combines preemption information for multiple carriers into a single DCI message. The base station transmits a unified preemption indication that covers multiple component carriers simultaneously, allowing the UE to decode preemption status across carriers without receiving separate messages for each carrier, thus reducing overall signaling overhead while maintaining decoding accuracy.
Solution Approach 2:
The preemption indication mechanism is designed to serve multiple carriers universally through a single DCI format. The indication structure is configured to cover a plurality of carriers, making the signaling mechanism multi-functional rather than carrier-specific, which reduces the total message size while still providing precise preemption information for each affected carrier.
2Quantity of substance
If preemption information is compressed to reduce message size, then signaling overhead is reduced, but decoding precision deteriorates
Solution Approach 1:
The preemption indication uses local quality by applying different indication patterns or formats to different carriers or carrier groups within the same DCI message. This allows the system to maintain high decoding precision for each carrier's specific preemption status while using a compressed unified structure, achieving both reduced message size and preserved precision through carrier-specific indication fields within the consolidated message.
3Productivity
If the system supports multiple carriers with preemption, then system capacity and multiplexing efficiency are improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the plurality of carriers into different groups or sets, where each group can be independently configured with preemption indication parameters. This segmentation allows the UE to manage complexity by processing preemption information in organized groups rather than handling all carriers as a single complex entity, thereby supporting multi-carrier operations efficiently while reducing the perceived device complexity through structured organization.
Data Source
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AI summary
Methods, systems, devices, and apparatuses for wireless communication are disclosed. In one aspect, a base station multiplexes services on shared channel resources with preemption. The base station may send one or more control messages with multi-carrier preemption information to user equipment (UE) devices which may be affected by the preemption. The preemption information may relate to a primary component carrier and one or more secondary component carriers designated for the UEs. In some aspects, the control message may comprise an indication of the availability of preemption information for each carrier in a plurality of carriers and may also include variable-size preemption information which is identifiable to the plurality carriers based on the subset of carriers for which preemption information is indicated as available. UEs may adjust the manner in which they send or receive a data transmission based on the preemption information. Additional aspects, embodiments, and features are described and claimed.