Preemption Indication Bitmap for NR Resource Decoding
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Solution Overview
Problem
In communication systems, particularly in NR systems, there is a need to indicate preempted time-frequency resources to prevent degradation of decoding performance for eMBB data when URLLC data is transmitted, as terminals may not be aware of resource preemption, leading to errors in decoding eMBB data.
Innovation Solution
A method where a base station transmits a preemption indication (PI) including a bitmap to indicate preempted resources, allowing terminals to identify and exclude preempted resources during decoding, thereby minimizing performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time-frequency resources are allocated for eMBB data transmission, then data transmission capacity is improved, but resource preemption by URLLC data causes decoding performance degradation
Solution Approach 1:
The base station transmits preemption indication information to the terminal, providing feedback about which time-frequency resources have been preempted by URLLC data. This allows the terminal to adjust its decoding process accordingly, maintaining reliability while preserving the high capacity provided by eMBB resource allocation.
Solution Approach 2:
The system pre-configures the terminal with information about the first resource region that may be preempted, and the terminal performs monitoring operations in advance to detect preemption indications before decoding eMBB data, allowing it to handle preempted resources appropriately.
2Reliability
If preemption indication information is transmitted to indicate preempted resources, then decoding performance is improved, but system complexity increases
Solution Approach 1:
Instead of providing complete resource allocation information for all time-frequency resources, the system only transmits preemption indication information for the specific first resource region that may be preempted by URLLC data. This localized approach reduces the complexity of preemption indication while maintaining decoding performance for affected resources.
Solution Approach 2:
The base station transmits preemption indication information only when and where needed (for the first resource region that may be preempted), rather than providing comprehensive preemption information for all possible resources. This partial action reduces system complexity while maintaining sufficient decoding performance.
Data Source
AI summary
A method for indicating preemption in a communication system is disclosed. A method for operating a terminal comprises the steps of: receiving, from a base station, information indicating a first resource area, to which a preemption-capable resource belongs, for transmission of first data; receiving resource allocation information of second data from the base station; performing a monitoring operation for detecting a PI indicating a preempted resource for transmission of the first data in the first resource area, when the first resource area overlaps with a second resource area indicated by the resource allocation information; and performing decoding on the basis of the detected PI. Therefore, the performance of the communication system may be improved.