Sidelink Carrier Aggregation PSFCH Slot Alignment
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Solution Overview
Problem
In wireless communication systems, particularly in sidelink communication carrier aggregation, there is a challenge in aligning physical sidelink feedback channel (PSFCH) slots across different component carriers, leading to incorrect automatic gain control (AGC) settings and transmission and reception contention.
Innovation Solution
The method involves obtaining configuration information that specifies each PSFCH resource of a plurality of PSFCH resources associated with a carrier aggregation operation to have a same time domain location across all component carriers, and configuring each bandwidth part with a same sidelink symbol length and start symbol, ensuring alignment of PSFCH slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation operation is performed across multiple component carriers without aligning PSFCH slots, then communication capacity is improved, but AGC settings become incorrect and transmission/reception contention occurs
Solution Approach 1:
The patent changes the time domain location parameter of PSFCH resources across different component carriers to be identical, ensuring that PSFCH slots are aligned. This parameter adjustment resolves the AGC setting issues while maintaining the carrier aggregation capacity benefits
Solution Approach 2:
The patent creates equipotential conditions by configuring all component carriers to have the same PSFCH time domain location, eliminating the potential differences (misalignments) that cause AGC errors and reception contention
2Productivity
If carrier aggregation operation is performed across multiple component carriers without aligning PSFCH slots, then communication capacity is improved, but transmission and reception contention occurs
Solution Approach 1:
The patent modifies the time domain location parameter of PSFCH resources to be consistent across all component carriers, which eliminates the transmission and reception contention caused by slot misalignment while preserving the enhanced communication capacity from carrier aggregation
3Adaptability or versatility
If different bandwidth parts are configured with different sidelink symbol lengths and start symbols, then flexibility in resource allocation is improved, but PSFCH slot alignment across component carriers deteriorates
Solution Approach 1:
The patent adjusts the sidelink symbol length and start symbol parameters of different bandwidth parts to ensure consistent PSFCH time domain locations across component carriers, achieving slot alignment while maintaining resource allocation flexibility through configurable bandwidth parts
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain configuration information associated with a sidelink communication, the configuration information indicating that each physical sidelink feedback channel (PSFCH) resource of a plurality of PSFCH resources associated with a carrier aggregation operation is to have a same time domain location across all component carriers of a plurality of component carriers, and indicating that each bandwidth part of a plurality of bandwidth parts associated with the carrier aggregation operation is to be configured with a same sidelink symbol length and a same sidelink start symbol. The UE may transmit or receive a sidelink communication in accordance with the configuration information. Numerous other aspects are described.