PUSCH Frequency Hopping Intervals for Long SLIV Allocation
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Solution Overview
Problem
In wireless communication systems, particularly those beyond 5G, the allocation of physical uplink shared channel (PUSCH) resources using a long start and length indicator value (SLIV) that spans across multiple slots without aligning with slot boundaries poses challenges for frequency hopping, including determining how to partition resources and specify carrier frequencies for effective frequency hopping.
Innovation Solution
A method and apparatus for configuring a group of frequency hopping intervals associated with a long SLIV, allowing the allocation of PUSCH resources to span across multiple slots irrespective of slot boundaries, with each interval associated with a subset of symbols, and enabling frequency hopping across these intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PUSCH resources are allocated using a long SLIV spanning across multiple slots irrespective of slot boundaries, then the flexibility and adaptability of resource allocation is improved, but the complexity of determining frequency hopping intervals and partitioning resources increases
Solution Approach 1:
The patent segments the long SLIV allocation into multiple frequency hopping intervals, where each interval corresponds to a specific subset of symbols. This segmentation allows the system to maintain flexibility in resource allocation while providing a structured approach to frequency hopping, reducing the complexity of determining hopping intervals and partitioning resources across multiple slots.
2Reliability
If frequency hopping is implemented across PUSCH resources allocated by long SLIV, then transmission quality and interference mitigation are improved, but the complexity of channel estimation and DMRS symbol placement increases
Solution Approach 1:
The patent incorporates DMRS (demodulation reference signal) symbols within each frequency hopping interval as a preliminary action. These pre-placed DMRS symbols enable the receiver to perform channel estimation before data transmission begins, facilitating accurate channel characterization and improving transmission quality while managing channel estimation complexity through structured placement.
3Productivity
If PUSCH resources are allocated across multiple slots irrespective of slot boundaries, then the productivity and spectral efficiency are improved, but the difficulty of detecting and measuring frequency hopping intervals increases
Solution Approach 1:
The patent employs frequency hopping that changes the carrier frequency across different time intervals, analogous to color changes. By transitioning between different frequency carriers in a structured manner across the long SLIV allocation, the system achieves improved spectral efficiency while the frequency changes serve as detectable markers that facilitate the measurement and detection of hopping intervals.
Data Source
AI summary
A method for wireless communication at a user equipment (UE), includes receiving, from a network node, a first downlink control information (DCI) message that includes a long start and length indicator value (SLIV) indicating an allocation of physical uplink shared channel (PUSCH) resources to a group of slots. The allocation of PUSCH resources is irrespective of slot boundaries of the group of slots and the PUSCH resources including a set of symbols. The method also includes receiving, from the network node, a first radio resource control (RRC) message configuring a group of frequency hop (FH) intervals associated with the long SLIV. Each FH interval may be associated with a respective subset of symbols of the set of symbols. Additionally, the method includes transmitting, to the network node, uplink data via the allocated PUSCH resources in accordance with the group of FH intervals.