Uplink Transmission Handling During Downlink Phase Continuity
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Solution Overview
Problem
In wireless communication systems, maintaining downlink phase continuity is challenging due to the need to avoid uplink transmissions during time intervals associated with downlink phase continuity, as these can disrupt phase coherence and degrade channel estimation accuracy.
Innovation Solution
A method where a user equipment (UE) receives information from a base station indicating a time interval associated with downlink phase continuity and refrains from performing uplink transmissions during this interval, allowing the base station to maintain phase continuity and enable joint channel estimation for improved downlink demodulation and decoding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink transmissions are performed during downlink phase continuity time interval, then uplink communication continuity is maintained, but downlink phase coherence is disrupted and channel estimation accuracy degrades
Solution Approach 1:
The patent extracts and isolates the uplink transmission function from the downlink phase continuity time interval by identifying and removing conflicting uplink transmissions (PUCCH, PUSCH, SRS) from this specific time period, thereby preserving downlink phase coherence without completely suspending uplink communication functionality
Solution Approach 2:
The patent implements dynamic adjustment of transmission timing by introducing a timing adjustment mechanism that shifts uplink transmission occasions based on the presence of downlink phase continuity intervals, allowing the system to adaptively coordinate between uplink and downlink requirements
2Measurement precision
If uplink transmissions are avoided during downlink phase continuity time interval, then channel estimation accuracy is improved, but uplink transmission resources are lost
Solution Approach 1:
The patent applies preliminary action by identifying downlink phase continuity intervals in advance through configuration signaling, allowing the UE to pre-determine which uplink transmissions should be dropped or postponed, thereby avoiding channel estimation degradation while minimizing uplink transmission losses
Solution Approach 2:
The patent implements a discard-and-recover mechanism where uplink transmissions that would conflict with downlink phase continuity are temporarily discarded (dropped or postponed), but the system recovers by rescheduling or compensating for these transmissions in subsequent opportunities, thus preserving both channel estimation accuracy and uplink communication functionality
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, information indicating that a time interval is associated with downlink phase continuity. The UE may refrain from performing, during the time interval associated with downlink phase continuity, an uplink transmission associated with a time domain resource that occurs during the time interval associated with downlink phase continuity. Numerous other aspects are described.