Phase Continuity Indication for Wireless Repeater Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face challenges with phase discontinuities at repeater devices, which can reduce the reliability of communications between base stations and user equipment (UEs) due to phase changes during signal amplification and retransmission.
Innovation Solution
The described techniques provide a method for mitigating phase discontinuities by scheduling wireless communications based on identified phase discontinuities, using demodulation reference signal (DMRS) configurations, and adjusting channel estimation algorithms, allowing for accurate channel estimation and frequency offset estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a repeater device amplifies and retransmits wireless communications, then signal coverage is extended, but phase discontinuities occur that reduce communication reliability
Solution Approach 1:
The system performs preliminary actions by scheduling communications during specific time periods when phase discontinuities are known to occur, and by configuring DMRS in advance for the affected symbol set. The base station identifies phase discontinuities beforehand and uses this information to schedule downlink communications during the discontinuity period, allowing the UE to receive communications with improved reliability despite the repeater's signal amplification.
2Duration of action of moving object
If phase discontinuities are present in wireless communications, then signal transmission continues, but channel estimation accuracy deteriorates
Solution Approach 1:
The system segments the communication symbols into two distinct sets: a first subset of symbols that experience phase discontinuities and a second subset of symbols that maintain phase continuity. By separating these symbol sets, the system can configure DMRS specifically for the second subset, allowing accurate channel estimation during periods when phase discontinuities are present, while still transmitting signals throughout the entire time period.
3Measurement precision
If DMRS configuration is adjusted for phase discontinuities, then channel estimation improves, but system complexity increases
Solution Approach 1:
The system applies local quality by configuring DMRS specifically for the second subset of symbols that maintain phase continuity, rather than attempting to correct phase discontinuities across all symbols. This localized approach allows the UE to perform accurate channel estimation using DMRS from the second subset during phase discontinuity periods, while leaving the first subset of symbols with phase discontinuities unchanged, thus reducing overall system complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A first device may receive a grant that schedules a wireless communication between the first device and a second device. The grant may indicate a demodulation reference signal (DMRS) configuration for a set of symbols associated with the wireless communication. The first device may receive control signaling that indicates a phase discontinuity associated with a first subset of symbols of the set of symbols. The first device may receive the wireless communication during a second subset of symbols of the set of symbols based on the DMRS configuration and the indication of the phase discontinuity. The first device may perform channel estimation based on receiving the wireless communication during the second subset of symbols.