Sidelink PSCCH Resource Allocation for Interference Suppression
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Solution Overview
Problem
Current wireless communication systems, particularly in the context of 5G NR V2X, face challenges in effectively determining and managing transmission resources for the physical sidelink control channel (PSCCH), which affects interference suppression and resource allocation efficiency.
Innovation Solution
A method and apparatus for determining and transmitting PSCCH resources, involving the selection of candidate resources associated with physical sidelink shared channel (PSSCH) resources, where Z successive resource blocks are used, including a center frequency, to maximize interference suppression while considering channel busy ratio, priority, latency, and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PSCCH transmission resources are allocated without optimized selection, then resource allocation is simple, but interference suppression is poor and resource allocation efficiency is low
Solution Approach 1:
The patent applies preliminary action by performing sensing operations before resource allocation to identify suitable PSCCH transmission resources. The UE senses the channel in advance, evaluates interference levels, and selects resources that minimize interference with other transmissions. This pre-selection process ensures reliable interference suppression while maintaining manageable complexity through structured sensing procedures.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting resource selection based on channel conditions, interference measurements, and transmission priorities. The system modifies parameters such as resource block allocation, time-frequency positioning, and power levels according to sensed channel state, thereby achieving optimal interference suppression adaptively without requiring overly complex fixed structures.
2Productivity
If PSCCH candidate resources are selected associated with PSSCH resources, then resource allocation efficiency is improved, but determination complexity increases
Solution Approach 1:
The patent applies merging by associating PSCCH candidate resource selection with PSSCH resource allocation. Instead of treating them as independent processes, the system combines the selection criteria, allowing PSCCH resources to be chosen in conjunction with data channel resources. This integrated approach improves overall resource allocation efficiency by reducing fragmentation and coordinating control and data transmissions.
Solution Approach 2:
The patent uses segmentation by dividing the resource selection process into manageable stages: sensing phase, evaluation phase, and selection phase. Each stage handles specific aspects of resource determination, breaking down the complex task of simultaneous PSCCH-PSSCH resource coordination into discrete, implementable steps that reduce overall determination complexity.
3Reliability
If Z successive resource blocks including center frequency are used for PSCCH, then interference suppression is maximized, but resource flexibility is reduced
Solution Approach 1:
The patent applies local quality by concentrating PSCCH transmission resources around the center frequency in a localized manner. By using Z successive resource blocks centered at the center frequency, the system creates a focused transmission region that benefits from frequency diversity and reduced interference from edge transmissions. This localized resource concentration achieves good interference suppression while the overall system maintains flexibility through selective application to different carrier configurations.
Data Source
AI summary
One embodiment relates to a sidelink terminal device which transmits a PSCCH in a wireless communications system, the device comprising: a memory; and a processor coupled to the memory, wherein the processor transmits a PSCCH by using at least some resources among PSCCH candidate resources associated with PSSCH candidate resources, and the resources for transmitting the PSCCH include a number Z of sequential resource blocks (RBs) and also include the center frequency of the PSCCH candidate resources on the frequency axis.