Span-Based Control Channel Distribution for Multi-TRP Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently distributing control channel elements (CCEs) and blind decodes (BDs) across carriers with different transmit receive point (TRP) capabilities, leading to sub-optimal resource utilization and increased complexity, especially in supporting ultra-reliable low latency communication (URLLC) applications.
Innovation Solution
The method involves determining a distribution of non-overlapped CCEs and BDs based on whether carriers are single-TRP or multi-TRP carriers, using span-based monitoring capabilities to optimize resource allocation and align search space sets with span configurations, thereby improving network performance and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform distribution of CCEs and BDs is applied across all carriers regardless of TRP capability, then implementation is simple, but resource utilization becomes sub-optimal
Solution Approach 1:
The patent applies different distribution strategies for CCEs and BDs based on the specific TRP capability of each carrier. Single-TRP carriers receive a different distribution pattern compared to multi-TRP carriers, optimizing resource allocation for each carrier's specific capability rather than using a uniform approach across all carriers.
2Productivity
If separate distribution strategies are developed for single-TRP and multi-TRP carriers, then resource utilization efficiency improves, but system complexity increases
Solution Approach 1:
The patent changes the distribution parameters (number of CCEs and BDs) based on the TRP capability parameter of each carrier. By dynamically adjusting these parameters according to whether a carrier is single-TRP or multi-TRP, the system achieves efficient resource utilization without requiring fundamentally different distribution mechanisms, thus managing complexity through parameter variation rather than structural complexity.
3Reliability
If the UE monitors all carriers with maximum CCEs and BDs, then reliability is improved, but UE processing complexity and power consumption increase
Solution Approach 1:
The patent applies partial monitoring action by allocating different numbers of CCEs and BDs to different carriers based on their TRP capability. Instead of monitoring all carriers with maximum resources, the UE monitors each carrier with an appropriate level of resources matched to its capability, achieving sufficient reliability without excessive processing burden.
4Productivity
If span-based monitoring is implemented to align with per-span capabilities, then resource allocation efficiency improves, but configuration complexity increases
Solution Approach 1:
The patent segments the monitoring resources into spans, where each span contains a specific number of CCEs and BDs configured according to the UE's per-span capability. This segmentation allows efficient resource allocation within each span while maintaining manageable configuration complexity through standardized span structures.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive configuration information for a plurality of carriers, wherein a set of first carriers of the plurality of carriers are single transmit receive point (single-TRP) carriers and a set of second carriers of the plurality of carriers are multi-TRP carriers; determine, for the plurality of carriers, a distribution that satisfies a per-span capability of the UE, wherein the distribution is of at least one of a plurality of non-overlapped control channel elements or a plurality of blind decodes, wherein the distribution is based at least in part on which carriers, of the plurality of carriers, are single-TRP carriers or multi-TRP carriers; and receive communications on the plurality of carriers in accordance with the distribution. Numerous other aspects are provided.