User Equipment PSFCH Cyclic Shift Determination for 5G V2X
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Solution Overview
Problem
Current V2X communication technologies, particularly in 5G NR networks, face challenges in efficiently determining cyclic shifts for sidelink feedback channels, which affects the reliability and resource allocation in V2X application scenarios.
Innovation Solution
A method for user equipment to determine sidelink resource pool configuration information and cyclic shifts of the physical sidelink feedback channel (PSFCH) based on received sidelink control information and pre-configured parameters, ensuring effective resource allocation and feedback mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cyclic shift determination methods are used in sidelink feedback channels, then implementation is simpler, but resource utilization and communication reliability deteriorate in V2X scenarios
Solution Approach 1:
The patent changes the parameters used for cyclic shift determination from conventional methods to a new approach based on PSFCH resource index, intra-group identifier, and cyclic shift pair configuration. This parameter transformation resolves the contradiction by using systematically generated parameters that improve reliability while maintaining manageable complexity through standardized formulas.
Solution Approach 2:
The patent applies preliminary action by pre-configuring cyclic shift pair information and establishing determination formulas before actual sidelink feedback transmission. The base station pre-configures multiple cyclic shift pairs, and the UE prepares the cyclic shift value using predetermined formulas involving PSFCH resource index and intra-group identifiers, ensuring reliable communication without complex real-time calculations.
2Productivity
If detailed cyclic shift determination methods are implemented, then resource allocation efficiency improves, but implementation complexity increases
Solution Approach 1:
The patent transforms the cyclic shift determination into a systematic parameter-based approach using PSFCH resource index, intra-group identifier, and pre-configured cyclic shift pairs. This resolves the contradiction by using standardized parameter combinations that improve resource allocation efficiency through systematic differentiation while maintaining implementation simplicity through formula-based calculation.
Solution Approach 2:
The patent segments the cyclic shift determination into distinct components: PSFCH resource index, intra-group identifier, and cyclic shift pair selection. Each component serves a specific function in resource differentiation, allowing efficient resource allocation through modular parameter combination rather than complex monolithic determination logic.
Data Source
AI summary
Provided in the present invention are a method performed by user equipment, and user equipment. The method comprises: determining sidelink resource pool configuration information to be first configuration information (S101); receiving, from another user equipment, sidelink control information (SCI) and a corresponding or associated physical sidelink shared channel (PSSCH) (S102); and determining a cyclic shift of a physical sidelink feedback channel (PSFCH) corresponding to the PSSCH.