Blind Decoding Scheduling for Wireless Communication Delay Reduction
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Solution Overview
Problem
In wireless communication systems, the use of PDCCH to indicate an analog receiving beam for PDSCH in the current subframe limits system scheduling flexibility and delays decoding, preventing UE from receiving the PDSCH within the decoding time due to channel decoding delays.
Innovation Solution
A method where the UE conducts blind decoding for a first radio signal in a second time interval and receives a second radio signal in a third time interval, using the same antenna port and shared scheduling information, allowing for effective utilization of decoding time without relying on correct decoding of the first signal, enabling flexible scheduling and reduced delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If PDCCH in current subframe is used to indicate analog receiving beam for PDSCH in current subframe, then the antenna array gain for PDSCH is improved, but the UE cannot receive PDSCH within decoding time due to channel decoding delays
Solution Approach 1:
The patent applies preliminary action by having the UE receive and conduct blind decoding on a first radio signal (PDCCH) in advance, before the second radio signal (PDSCH) is transmitted. The UE performs channel decoding during the second time interval, which is completed before the third time interval when PDSCH reception occurs. This preliminary decoding action resolves the timing conflict between decoding completion and PDSCH reception, allowing the UE to use the decoded scheduling information for subsequent PDSCH reception without waiting for current subframe decoding.
2Productivity
If PDCCH in current subframe is used to indicate analog beam for PDSCH, then the throughput of cell is improved, but the flexibility of system scheduling is limited
Solution Approach 1:
The patent segments the scheduling process into distinct time intervals: the first time interval for PDCCH transmission, the second time interval for blind decoding and channel decoding, and the third time interval for PDSCH reception. This segmentation allows independent optimization of each stage - control signaling can be sent early to enable throughput improvement, while the decoded scheduling information can flexibly determine PDSCH parameters in later intervals, thus maintaining scheduling flexibility while achieving high throughput.
Solution Approach 2:
The patent introduces dynamic scheduling by allowing the first signaling decoded from PDCCH to determine first scheduling information that is shared by both second and third radio signals. The scheduling parameters (such as time-frequency resources, MCS, antenna ports) can be dynamically adjusted based on channel conditions and system requirements, rather than being fixed in advance. This dynamic approach enables both high throughput through efficient resource utilization and scheduling flexibility through adaptive parameter selection.
Data Source
AI summary
The present disclosure provides a method and a device in a User Equipment (UE) and a base station used for wireless communication. The UE in sequence receives a first radio signal in a first time interval, conducts blind decoding for the first radio signal in a second time interval and receives a second radio signal in a third time interval, and receives a third radio signal in a fourth time interval. The second radio signal and the third radio signal are transmitted by the same antenna port. The end time of the second time interval is behind the start time of the third time interval, and the fourth time interval is behind the third time interval. The present disclosure reduces the delay in beam scheduling, improves the efficiency of transmission and improves the flexibility of system scheduling.