Sidelink DMRS Sequence Generation for Reliable V2X Synchronization
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently generating and utilizing demodulation reference signals (DMRS) for sidelink communication, particularly in vehicle-to-everything (V2X) systems, which affect the synchronization and decoding of direct user equipment communications.
Innovation Solution
A method for generating a demodulation reference signal (DMRS) based on first and second identifiers of a sidelink device, enabling synchronization and decoding of broadcast signals between devices, and utilizing this DMRS for sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DMRS sequences are generated using conventional methods in sidelink communication, then basic demodulation functionality is provided, but synchronization efficiency and decoding reliability are insufficient for direct device-to-device communication
Solution Approach 1:
The patent changes the initialization parameters of the DMRS sequence generator by incorporating first and second identifiers specific to sidelink devices. This modification transforms the sequence generation process to be tailored for direct device-to-device communication, improving synchronization reliability while maintaining manageable complexity through parameter adjustment rather than structural redesign
Solution Approach 2:
The patent segments the DMRS generation process by introducing device-specific identifiers that divide the communication into identifiable transmitter and receiver pairs. This segmentation enables reliable synchronization between specific devices without requiring complex centralized coordination, thus improving reliability while keeping the system relatively simple
2Measurement precision
If device-specific identifiers are incorporated into DMRS sequence generation, then synchronization precision is improved, but the complexity of sequence generation increases
Solution Approach 1:
The patent achieves improved synchronization precision by changing the initialization parameters of the pseudo-random sequence generator to include device-specific identifiers. This approach enhances measurement precision through parameter modification rather than through complex algorithmic changes, thereby improving synchronization accuracy while maintaining relatively simple generation complexity
Data Source
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AI summary
Aspects relate to a demodulation reference signal (DMRS) in a sidelink wireless communication network. In some examples, a sidelink device generates a DMRS based on first and second identifiers of the sidelink device. In some examples, a sidelink device generates a DMRS based on an initialization parameter and/or at least one scaling parameter. In some examples, the initialization parameter may be based on a first identifier of a sidelink device. In some examples, the at least one scaling parameter may be based on a second identifier of a sidelink device. In some examples, a first sidelink device synchronizes with a second sidelink device based on broadcast channel information that is obtained by using DMRS information to decode a received broadcast signal. In some examples, the DMRS information may be based on first and second identifiers of the first sidelink device.