Preemption Indicator Techniques for Wireless Resource Partitioning
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Solution Overview
Problem
Wireless communication systems face challenges in accommodating different cellular services with varying reliability, latency, and data rate requirements within a unified physical layer framework, while maintaining performance, low complexity, and low power consumption.
Innovation Solution
The implementation of dynamic resource partitioning and preemption mechanisms, where unused time and frequency resources are utilized for low-latency services, and preemption indicators are transmitted to allow successful decoding and reduce blind decoding in mobile devices, using RRC, DCI, and dedicated frequency signaling to specify time and frequency resources for preemption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If preemption is allowed for low-latency services in shared physical layer frames, then latency requirement is improved, but reliability of high-rate data services deteriorates
Solution Approach 1:
The physical layer frame is segmented into multiple partitions, with some partitions designated for preemption and others protected. This allows low-latency services to access specific time-frequency resources without affecting the reliability of high-rate data services in protected partitions.
Solution Approach 2:
Different partitions of the physical layer frame are assigned different qualities - some partitions allow preemption for low-latency services while others provide protected transmission for high-rate services. This local differentiation resolves the contradiction by allowing both service types to coexist with appropriate guarantees.
2Measurement precision
If preemption indicators are transmitted to mobile devices, then decoding performance is improved, but device complexity increases
Solution Approach 1:
Preemption indicators are transmitted in advance or simultaneously with preemption events, allowing mobile devices to prepare for potential decoding adjustments. This preliminary information reduces the need for complex blind decoding attempts by providing advance notice of resource allocation changes.
Solution Approach 2:
The system implements feedback mechanisms where preemption indicators provide information about actual resource usage to mobile devices. This feedback loop enables devices to adjust their decoding strategies based on real-time network conditions, improving performance without requiring overly complex internal processing.
3Adaptability or versatility
If dynamic resource partitioning is implemented, then adaptability is improved, but system complexity increases
Solution Approach 1:
The resource partitioning scheme is made dynamic, allowing partitions to be reconfigured based on traffic conditions and service requirements. This dynamic adaptation enables the system to respond to changing demands while the standardized partitioning framework keeps implementation complexity manageable.
Solution Approach 2:
The physical layer frame structure is designed to support multiple services and functions within a unified framework. The same partitioning mechanism serves both eMBB and URLLC services, reducing the need for separate complex systems and enabling adaptability through a single versatile structure.
Data Source
AI summary
Techniques are disclosed relating to downlink control information for wireless communications. In some embodiments, the downlink control information includes code block group information that indicates which code block groups are transmitted and soft buffer handling information that indicates whether to flush previously-determined soft bits that correspond to one or more code block groups.