Dynamic Control Signaling Field Adjustment for URLLC
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face challenges in effectively interpreting control information based on a repetition factor, particularly in adjusting control signaling for subsequent messages based on the number of retransmissions, which affects the reliability and latency of ultra-reliable and low-latency communications.
Innovation Solution
The described techniques involve modifying the parameters of subsequent messages and control signaling by adjusting the size or range of fields in downlink control information based on the repetition factor, including determining the redundancy version sequence, number of layers, DMRS indication, modulation and coding scheme, and HARQ process, to optimize communication for ultra-reliable and low-latency messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of repetitions of a subsequent message is increased to improve reliability, then the reliability is improved, but the latency increases
Solution Approach 1:
The patent applies dynamics by making the control signaling parameters dynamic rather than static. The size or range of fields in downlink control information is adjusted based on the repetition factor, allowing the system to adapt control signaling to the specific needs of each transmission scenario. This dynamic adjustment optimizes the balance between reliability and latency by tailoring control overhead to the actual repetition requirements.
Solution Approach 2:
The patent changes parameters of control signaling based on the repetition factor. Specifically, the size or range of fields in downlink control information is modified according to the number of repetitions. This parameter change allows efficient use of control resources while maintaining reliability requirements, thereby reducing unnecessary latency caused by excessive control overhead.
2Productivity
If the size or range of fields in downlink control information is adjusted based on repetition factor, then the efficiency of control signaling is improved, but the complexity of interpreting control information increases
Solution Approach 1:
The patent applies preliminary action by indicating the repetition factor in advance within the downlink control information. This allows the user equipment to pre-determine the appropriate field size or range before interpreting the control information, simplifying the interpretation process despite the dynamic nature of the parameters. The repetition factor serves as a key that unlocks the correct interpretation mode.
Solution Approach 2:
The patent applies local quality by making different parts of the control information have different properties based on the repetition factor. Specifically, the size or range of certain fields is locally adjusted according to the repetition requirements, while other parts of the control information remain unchanged. This localized adjustment optimizes efficiency without requiring complete restructuring of the control information format.
3Reliability
If control signaling parameters are dynamically adjusted based on repetition factor, then the quality of service for ultra-reliable and low-latency communications is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a control information structure that can serve multiple functions based on the repetition factor. The same downlink control information format can accommodate different field sizes or ranges to support various repetition scenarios, making the system versatile for different service requirements without requiring separate control structures for each scenario.
Solution Approach 2:
The patent makes the control signaling dynamic by adjusting field sizes or ranges based on the repetition factor, allowing the system to adapt to different quality of service requirements. This dynamic capability enables the system to optimize for ultra-reliable and low-latency communications when needed, while maintaining compatibility with standard communication scenarios.
Data Source
AI summary
Techniques are described herein for adjusting control signaling for a subsequent message based on a number of retransmissions of the subsequent message. The number of repetitions of the subsequent message may be used to modify the parameters of the subsequent message and/or modify the control signaling related to the parameters of the subsequent message. Downlink control information may include a plurality of fields related to one or more parameters of the subsequent message. A size or a range of at least some of the plurality of fields may vary based on the number of repetitions of the subsequent message. The number of repetitions may be based on a repetition factor.