TBoMS Rate Matching via Independent Start Bit Point
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Solution Overview
Problem
Current solutions for transport block over multiple slots (TBoMS) face inefficiencies in rate matching, particularly when decoding channel state information (CSI) across multiple slots, which affects system performance due to dependency on correct decoding of CSI part 1 before decoding the transport block.
Innovation Solution
A terminal device determines a start bit point in a circular buffer for each slot based on a redundancy version (RV) start indication and a predetermined factor, allowing independent decoding of two parts of CSI and improving communication efficiency by determining the start bit point using the formula km=(RV+m×E) mod Nbuffer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transport block is transmitted over multiple slots using TBoMS, then coverage is enhanced, but decoding dependency on CSI part 1 increases system complexity and reduces efficiency
Solution Approach 1:
The patent segments the rate matching process by introducing a separate start bit point determination for transport block decoding independent of CSI part 1 decoding. The formula km=(RV+m×E) mod Nbuffer calculates start bit points specifically for transport block rate matching without requiring CSI part 1 decoding results, thus dividing the decoding dependency chain into independent segments.
2Measurement precision
If rate matching depends on correct decoding of CSI part 1, then decoding accuracy may be maintained, but transmission efficiency decreases due to sequential processing requirements
Solution Approach 1:
The patent segments rate matching into two independent processes: one for CSI (using CSI-specific start bit points) and one for transport block (using the new formula km=(RV+m×E) mod Nbuffer). This segmentation allows parallel processing of CSI and transport block rate matching, eliminating sequential dependencies while maintaining decoding accuracy through dedicated start bit point calculations for each.
Solution Approach 2:
The patent performs preliminary action by pre-calculating start bit points for transport block rate matching using the formula km=(RV+m×E) mod Nbuffer before CSI decoding is completed. This preliminary determination of rate matching parameters allows the transport block rate matching to proceed independently without waiting for CSI part 1 decoding results.
3Manufacturing precision
If start bit point is determined using CSI decoding results, then rate matching accuracy is maintained, but system overhead increases due to additional dependency signaling
Solution Approach 1:
The patent extracts the start bit point determination for transport block rate matching from the CSI decoding process. By using the independent formula km=(RV+m×E) mod Nbuffer that relies only on RV start indication, slot index, and predetermined factor E, the patent removes the dependency on CSI decoding results, thereby reducing signaling overhead and information loss while maintaining rate matching accuracy through dedicated parameter calculation.
Data Source
AI summary
According to embodiments of the present disclosure, solutions on the transport block over multiple slots (TBoMS) are proposed. A terminal device receives a configuration from a network device. The configuration indicates that a transport block is transmitted over a first number of slots. The terminal device determines a start bit point of a circular buffer in a slot within the first number of slots based on a redundancy version start indication, an index of the slot and a predetermined factor. In this way, two parts of the CSI can be decoded independently and it can achieve improved performances.