Base Station Uplink Response Signal Bandwidth Control
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Solution Overview
Problem
Current mobile communication systems face challenges in efficiently scheduling downlink control signals with hybrid automatic repeat request (HARQ) in self-contained operations, leading to increased delay and complexity due to limited resources for uplink response signals, particularly in 5G new radio access technology (NR).
Innovation Solution
The proposed solution involves a base station and terminal configuration that efficiently schedules downlink control signals by controlling the uplink frequency resource for the response signal within the same time unit as the downlink data, ensuring the transmission bandwidth of the response signal is equal to or lower than that of the corresponding downlink data, and associating the radio resource for the response signal with the downlink control signal's resource, thereby simplifying scheduling and reducing delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the uplink frequency resource for response signal is limited in self-contained operation, then the scheduling complexity is reduced, but the probability of failed orthogonal resource assignments increases and delay increases
Solution Approach 1:
The patent changes the bandwidth parameter of the uplink response signal to be equal to or lower than the downlink data bandwidth. This parameter adjustment allows the response signal to fit within the available frequency resources while maintaining orthogonal resource assignment success and reducing scheduling complexity.
Solution Approach 2:
The patent applies local quality by making the response signal bandwidth adaptive to the specific downlink data bandwidth allocation. Instead of using a fixed system-wide bandwidth, the response signal bandwidth is locally adjusted to match the actual data transmission bandwidth, optimizing resource utilization and reducing failed assignments.
2Adaptability or versatility
If the response signal bandwidth is not constrained, then the resource assignment flexibility is improved, but the scheduling complexity and delay increase
Solution Approach 1:
The patent introduces a bandwidth constraint parameter that links the uplink response signal bandwidth to the downlink data bandwidth. This parameter change maintains flexibility within bounds, allowing adaptive resource assignment while simplifying scheduling by establishing a clear bandwidth relationship.
3Quantity of substance
If the response signal bandwidth is not constrained, then the transmission capacity is improved, but the delay increases
Solution Approach 1:
The patent adjusts the bandwidth parameter of the response signal to be equal to or lower than the downlink data bandwidth. This parameter optimization ensures sufficient transmission capacity for HARQ feedback while reducing the time required for resource allocation and signal processing, thereby minimizing communication delay.
Data Source
AI summary
In a base station, a transmission unit transmits a downlink control signal and downlink data assigned by the downlink control signal in a time unit including a downlink time resource for the downlink control signal, a downlink time resource for the downlink data, and an uplink time resource for a response signal for the downlink data. A reception unit receives the response signal in the time unit. A transmission bandwidth of the response signal is equal to or lower than a transmission bandwidth of the downlink data corresponding to the response signal.