Uplink Shared Channel Frequency Hopping Indexing
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Solution Overview
Problem
Conventional frequency hopping techniques for uplink shared channel repetitions in wireless communications systems result in unbalanced frequency hop usage and reduced transmission performance due to unalternated frequency hop selection based on physical slot numbers.
Innovation Solution
Determining frequency hops for each repetition of the uplink shared channel transmission based on an uplink shared channel index, such as an uplink transmission occasion index or repetition index, to enhance alternation and balance frequency hop usage, thereby improving transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is applied to uplink shared channel repetitions, then transmission reliability is improved, but frequency hop usage becomes unbalanced and alternation is reduced
Solution Approach 1:
The patent changes the parameter used for frequency hop determination from physical slot number to uplink shared channel index. This parameter change ensures that frequency hops alternate properly and usage is balanced, resolving the contradiction between maintaining reliability through frequency hopping and achieving productive frequency hop usage.
Solution Approach 2:
The patent introduces dynamic frequency hop selection based on the uplink shared channel index, which varies with each transmission occasion. This dynamic approach ensures that frequency hops are selected adaptively, improving both alternation and balance compared to static methods based on physical slot numbers.
2Ease of operation
If frequency hops are determined based on physical slot numbers, then implementation is simple, but frequency hop alternation is reduced and usage is unbalanced
Solution Approach 1:
The patent changes the determining parameter from physical slot number to uplink shared channel index. While this requires additional indexing logic, it achieves much better frequency hop alternation and balance, improving the overall effectiveness of frequency hopping for uplink transmissions.
3Reliability
If multiple repetitions are transmitted using frequency hopping, then uplink transmission performance is improved, but frequency resource utilization becomes unbalanced
Solution Approach 1:
By changing the frequency hop determination parameter to uplink shared channel index, the patent achieves more balanced distribution of frequency resources across multiple repetitions. This ensures that different frequency resources are utilized more evenly, improving overall resource utilization while maintaining transmission performance.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, a control message identifying a frequency hop configuration that configures the UE to use frequency hopping when transmitting repetitions of an uplink shared channel transmission. The UE, the base station, or both may determine, based on the UE being configured with the frequency hop configuration, a frequency hop for each repetition of the uplink shared channel transmission. Each frequency hop may be determined based on a corresponding uplink shared channel index for a respective repetition a frequency hop for each repetition of the uplink shared channel transmission. The uplink shared channel index may be an uplink transmission occasion index, or a repetition index. The UE may transmit the repetitions of the uplink shared channel transmission using respective frequency hops in accordance with the determination and the frequency hop configuration.