FDM Uplink Scheduling for Interlaced RBs in Shared Spectrum
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Solution Overview
Problem
Conventional FDM uplink scheduling techniques fail to account for resource allocations in shared RF spectrum bands, leading to incompatibility with FDM operations, particularly in unlicensed frequency bands where devices from different technologies may interfere.
Innovation Solution
A user equipment (UE) partitions a set of resource blocks (RBs) into two groups for FDM transmission based on an interlace assignment and RB set assignment, using different transmission parameters for each group, enabling efficient and reliable communication in shared RF spectrum bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional FDM uplink scheduling techniques are used, then simplicity of scheduling is maintained, but compatibility with interlaced RB allocation in shared RF spectrum bands is lost
Solution Approach 1:
The set of resource blocks is divided into two separate groups (first group and second group), each transmitted using different transmission parameters. This segmentation allows the system to accommodate interlaced RB allocation requirements while maintaining FDM operation, resolving the contradiction between adaptability and complexity by structuring the resource allocation in manageable segments.
Solution Approach 2:
The patent introduces dynamic partitioning rules that can adapt based on the interlace assignment and RB set assignment received in control signaling. The UE dynamically determines how to split RBs into groups based on received parameters, enabling flexibility and compatibility with varying interlaced allocation patterns without requiring a completely new static scheduling framework.
2Adaptability or versatility
If resource blocks are partitioned into two groups with different transmission parameters, then FDM transmission compatibility is improved, but processing complexity at the UE increases
Solution Approach 1:
The partitioning rule is pre-configured or pre-agreed upon between the gNB and UE, allowing the UE to simply apply the rule based on received interlace and RB set assignments without performing complex real-time optimization. This preliminary establishment of partitioning logic reduces UE processing complexity while maintaining FDM compatibility.
3Manufacturing precision
If interlace assignment and RB set assignment are both considered in partitioning, then allocation accuracy is improved, but computational requirements increase
Solution Approach 1:
The patent applies a partitioning rule that considers interlace assignment and RB set assignment to the extent necessary for FDM compatibility, rather than optimizing all possible parameters. This partial consideration approach achieves sufficient allocation precision for FDM operation without requiring exhaustive computational analysis of all resource allocation dimensions.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control signaling scheduling a frequency division multiplexed (FDM) uplink shared channel message. The control signaling may include a resource allocation for a set of resource blocks (RBs), the resource allocation indicating an interlace assignment and an RB set assignment. The UE may allocate, according to a rule, the set of RBs into a first group of RBs and a second group of RBs based on the interlace assignment and the RB set assignment. The UE may transmit the FDM uplink shared channel message including the first group of RBs and the second group of RBs. The first group of RBs may be transmitted in accordance with a first set of transmission parameters and the second group of RBs may be transmitted in accordance with a second set of transmission parameters.