PSFCH Resource Mapping for Scheduling Requests
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing scheduling request transmissions on physical sidelink feedback channels (PSFCH), leading to underutilization of resources and potential interference between scheduling requests and HARQ transmissions.
Innovation Solution
The method involves receiving control signaling indicating a subset of PSFCH resource blocks (RBs) allocated for scheduling request transmission, and transmitting a scheduling request message in those allocated RBs, while also managing HARQ transmissions in overlapping or separate RBs to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PSFCH resources are allocated for scheduling request transmission, then scheduling request capability is improved, but resource utilization efficiency deteriorates due to underutilization
Solution Approach 1:
The PSFCH resources are configured to serve multiple purposes: they can be used for scheduling request transmissions by some UEs and for HARQ feedback transmissions by other UEs. This multi-functional allocation allows the same physical channel resources to support different communication needs, thereby improving overall resource utilization while maintaining scheduling request capability.
2Adaptability or versatility
If PSFCH resources are allocated for scheduling request transmission, then scheduling request capability is improved, but interference increases with HARQ transmissions
Solution Approach 1:
The PSFCH resources are segmented into different subsets: some resource blocks are allocated for scheduling request transmissions while other resource blocks are allocated for HARQ feedback transmissions. By dividing the resources and assigning different functions to different segments, the patent eliminates interference between scheduling requests and HARQ feedback while maintaining both capabilities.
3Adaptability or versatility
If PSFCH resources are allocated for scheduling request transmission, then scheduling request capability is improved, but latency increases due to resource conflicts
Solution Approach 1:
The PSFCH resources are divided into separate subsets for scheduling requests and HARQ feedback transmissions. This segmentation eliminates resource conflicts that would otherwise cause delays, allowing both types of transmissions to occur simultaneously without interference, thereby reducing latency while maintaining scheduling request capability.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support the transmission of a scheduling request via a physical sidelink feedback channel (PSFCH). In some cases, a user equipment (UE) may determine a configuration of a set of PSFCH resource blocks (RBs). The UE may receive a first bit map that may indicate a subset of the set of PSFCH RBs allocated for transmitting a scheduling request on the PSFCH, and the UE may receive a second bit map that may indicate a second subset of the PSFCH RBs allocated for hybrid automatic repeat request (HARQ) messages. The UE may transmit a scheduling request via one or more RBs of the first subset of the PSFCH RBs. In some cases, the UE may generate a waveform for transmitting the scheduling request message, and the waveform may be based on the number of RBs selected.