Dynamic Time-Frequency Resource Pool Association for Wireless Communication
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Solution Overview
Problem
In wireless communication systems, particularly in multi-TRP communications, achieving multiple repetitions of PDCCH transmissions within an acceptable delay range is challenging, leading to potential excessive latency due to inconsistent periodic configurations of search space sets and other factors, which affects the system's efficiency and reliability.
Innovation Solution
A method involving the monitoring of first and second time-frequency resource pools, where association is determined by overlapping or orthogonal time-domain resources, allowing for joint demodulation or decoding only when delay restrictions are met, thereby avoiding excessive latency and enhancing scheduling flexibility and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple repetitions of PDCCH transmissions are performed in multi-TRP communications, then reliability is improved, but latency increases due to excessive delay
Solution Approach 1:
The patent applies dynamics by making the association between time-frequency resource pools conditional rather than fixed. The association relationship is dynamically determined based on whether time-domain resources overlap and whether delay restrictions are satisfied, allowing the system to adapt between associated and non-associated states to balance reliability and latency
Solution Approach 2:
The patent changes the parameter of resource pool association status based on delay conditions. When delay restrictions are met, resource pools are associated for joint decoding; when not met, they are treated as non-associated. This parameter change allows flexible control over the trade-off between reliability (through association) and latency (through independent decoding)
2Reliability
If time-frequency resource pools are always associated for joint demodulation, then reliability is improved, but scheduling flexibility is reduced
Solution Approach 1:
The patent makes the association relationship dynamic rather than static. The resource pools can switch between associated and non-associated states based on real-time conditions such as delay restrictions and resource overlap, providing both reliability when conditions permit and flexibility when they don't
Solution Approach 2:
The patent introduces delay restriction conditions as an intermediary criterion that mediates between the desire for reliable joint demodulation and the need for scheduling flexibility. This intermediary condition determines whether association is appropriate, allowing the system to adapt to different scenarios
3Reliability
If multiple PDCCH candidates are monitored across different resource pools, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the monitoring process into two distinct paths: associated resource pools that require joint demodulation and non-associated resource pools that allow independent decoding. This segmentation reduces complexity by allowing the receiver to choose the appropriate processing path based on association status, rather than always performing complex joint demodulation across all resource pools
Data Source
AI summary
The present disclosure provides a method and a device in a node used for wireless communications. A first receiver, monitoring in a first time-frequency resource pool and a second time-frequency resource pool; herein, a first instant of time is a boundary instant of the first time-frequency resource pool in time domain, the first instant of time being used to indicate a first time window; when time-domain resources occupied by the second time-frequency resource pool and the first time window are overlapping, the first time-frequency resource pool is associated with the second time-frequency resource pool; when time-domain resources occupied by the second time-frequency resource pool and the first time window are orthogonal, the first time-frequency resource pool is not associated with the second time-frequency resource pool.