Dynamic Uplink Control Repetition Timing for Reliable Coverage
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Solution Overview
Problem
Wireless communication systems face challenges in managing wireless channel resources due to signal attenuation and blocking in complex environments, undermining established channel measuring and reporting mechanisms, necessitating improvements in uplink control channel reliability and coverage.
Innovation Solution
Applying a repetition factor to uplink control channels, where the configuration is indicated on a downlink control channel and implemented after a configured time period, ensuring sufficient processing time for user equipment to enhance coverage and reliability by transmitting multiple repetitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a repetition factor is applied to uplink control channels to enhance coverage and reliability, then the likelihood of successful reception is improved, but the processing time and system complexity increase
Solution Approach 1:
The patent applies preliminary action by configuring the repetition factor in advance through RRC signaling before the actual uplink control channel transmission occurs. This allows the UE to prepare the repetition configurations beforehand, so when the DL control channel indicates to apply the repetition factor, the UE can immediately execute without complex real-time processing, thus improving reliability while minimizing processing time delays.
2Reliability
If a repetition factor is dynamically indicated on DL control channel to apply to both scheduled and unscheduled UL control channels, then coverage and reliability are improved, but the device complexity and signaling overhead increase
Solution Approach 1:
The patent applies universality by creating a unified repetition mechanism that can be dynamically applied to multiple types of uplink control channels (both scheduled PUCCH and unscheduled PUCCH carrying UCI) through a single DL control channel indication. The UE maintains a unified configuration for repetition factors that can be activated across different UL control channel types, reducing the need for separate processing logic for each channel type and thereby managing device complexity while achieving improved reliability across multiple channels.
Solution Approach 2:
The patent applies parameter changes by dynamically modifying the repetition factor parameter based on DL control channel indications. The system transitions from static repetition configurations to dynamic parameter adjustment, where the repetition factor can be changed on-demand to match current channel conditions and requirements, allowing the system to adapt reliability enhancements to actual needs rather than applying fixed complex configurations always.
3Length of stationary object
If multiple repetitions of uplink control channels are transmitted, then coverage is enhanced, but the signaling overhead and resource consumption increase
Solution Approach 1:
The patent applies partial action by implementing selective repetition where the repetition factor is only applied when explicitly indicated by the DL control channel. Instead of transmitting multiple repetitions unconditionally for all uplink control channels, the system applies repetitions partially - only when the dynamic indication triggers the configured repetition factor. This reduces unnecessary signaling overhead and resource consumption while still providing coverage enhancement when needed, avoiding excessive repetition transmissions.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for application of a repetition factor to uplink (UL) control channels. A method that may be performed by a user equipment (UE) includes receiving, on a downlink (DL) control channel, an indication of a configuration for repetition of a UL control channel scheduled by the DL control channel and another UL control channel, wherein the configuration is applied for repetition of the other UL control channel after a configured time period starting from reception of the DL control channel; and transmitting the repetition of the UL control channel and the repetition of the other UL control channel in accordance with the configuration.