DCI Early Termination for Power Saving in Repeated Transmissions
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Solution Overview
Problem
In LTE 4G systems, there is a lack of effective indication solutions for early termination of repeated transmissions in coverage enhancement scenarios, particularly for normal terminals, which leads to inefficient power usage due to excessive repeated transmissions.
Innovation Solution
The proposed solution involves reconstructing the information domain in Downlink Control Information (DCI) to enable early termination of repeated transmissions for both normal NR terminals and Redcap terminals, by using specific bit information or states within the DCI to indicate when a terminal should stop retransmissions, thereby improving power saving in coverage enhancement scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated transmissions are configured for coverage enhancement, then transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements early termination through feedback mechanisms where the network monitors transmission status and sends termination indications to the terminal. The terminal receives feedback information (e.g., through DCI format 1A with specific bit patterns) that indicates when to stop repeated transmissions, thereby avoiding unnecessary power consumption while maintaining reliable transmission when needed.
Solution Approach 2:
The patent introduces dynamic control of repeated transmissions by allowing the network to adjust the transmission count based on real-time conditions. Through configurable parameters and dynamic termination indications, the system transitions from static fixed-repetition schemes to dynamic adaptive repetition, enabling the terminal to adjust its behavior based on actual transmission success and network instructions.
2Reliability
If excessive repeated transmissions are performed, then coverage enhancement is achieved, but power saving efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by configuring the terminal with maximum repetition counts and termination indication mechanisms in advance. The network pre-configures DCI formats and bit patterns that indicate termination conditions, allowing the terminal to prepare for early termination before unnecessary transmissions occur, thus improving power saving efficiency while maintaining coverage enhancement capability.
Solution Approach 2:
The system uses feedback mechanisms where the network monitors transmission status and sends termination indications to the terminal. The terminal receives feedback information (e.g., through DCI format 1A with specific bit patterns) that indicates when to stop repeated transmissions, thereby avoiding unnecessary power consumption while maintaining reliable transmission when needed.
3Use of energy by moving object
If early termination indication is added to DCI, then power saving is improved, but DCI structure complexity increases
Solution Approach 1:
The patent applies universality by making existing DCI fields serve multiple functions. The same DCI format (e.g., format 1A) that previously only carried basic transmission information is now also used to convey early termination indications through specific bit patterns. This multi-functionality approach allows early termination capability to be added without creating entirely new DCI structures, thus minimizing complexity increase while achieving power saving benefits.
Solution Approach 2:
The patent uses parameter changes by modifying the interpretation of existing DCI bits rather than adding new fields. By changing the semantic meaning of specific bit patterns in existing DCI formats (e.g., using specific combinations of bits in format 1A to indicate termination), the system achieves early termination functionality with minimal structural changes, thereby limiting the increase in DCI structure complexity.
Data Source
AI summary
The present disclosure provides an early termination method and apparatus, a communication device, and a storage medium. The method includes: instructing a terminal to terminate a repeated transmission by means of an information domain in downlink control information (DCI).