Erasure LDPC Rate Matching for Transport Block Over Multiple Slots
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently managing rate matching for transport blocks (TB) across multiple slots, especially when dynamic uplink control information (UCI) multiplexing occurs, leading to inefficient resource allocation and potential delays in UCI transmission.
Innovation Solution
A method and apparatus at the user equipment (UE) and base station that calculate and allocate rate matching output bits for each uplink slot, skipping bits for UCI multiplexing to maintain efficient resource allocation and support dynamic UCI updates, allowing for pre-calculated slot boundaries and efficient rate matching without accounting for UCI multiplexing before the start of the TB transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rate matching is performed without accounting for UCI multiplexing before TB transmission starts, then resource allocation efficiency is improved and UCI transmission delays are reduced, but the accuracy of rate matching may be compromised when dynamic UCI updates occur
Solution Approach 1:
The patent performs rate matching for the transport block before the actual transmission starts, without accounting for dynamic UCI multiplexing updates. This preliminary rate matching allows the system to prepare the TB in advance while maintaining efficiency, and the pre-calculated slot boundaries enable quick adaptation when UCI multiplexing occurs dynamically during transmission
Solution Approach 2:
The patent supports dynamic UCI multiplexing updates that can occur during TB transmission across multiple slots. The rate matching structure is designed to accommodate dynamic changes in UCI multiplexing conditions while maintaining the pre-calculated rate matching output, allowing the system to adapt to changing transmission conditions without reprocessing the entire TB
2Adaptability or versatility
If rate matching output bits are allocated for each UL slot considering multiple slots, then the system supports TBoMS efficiently, but the complexity of calculating and managing slot boundaries increases
Solution Approach 1:
The patent divides the transport block transmission across multiple uplink slots (TBoMS - Transport Block over Multiple Slots), with each slot having pre-calculated slot boundaries and rate matching output bit allocations. This segmentation allows the TB to be transmitted efficiently across multiple time slots while maintaining clear boundaries for each slot's rate matching operations
Solution Approach 2:
The slot boundaries and rate matching parameters are pre-calculated before TB transmission begins, even though the actual transmission spans multiple slots. This preliminary calculation of slot boundaries simplifies the management complexity during actual transmission, as the system already has the division plan ready without needing to make complex decisions during each slot transition
Data Source
AI summary
Methods, apparatuses, and computer-readable storage medium for rate matching for TBoMS are provided. An example method includes calculating a slot length for each UL slot of a plurality of UL slots, the slot length for each UL slot being associated with a plurality of rate matching output bits, each UL slot including a starting point for the plurality of rate matching output bits, the slot length for each UL slot being associated with a starting boundary, the plurality of UL slots being associated with at least one of a single TB or a single rate matching. The example method may include allocating one or more bits of the plurality of rate matching output bits for a modulation process. The example method may include refraining allocating at least one bit of the plurality of rate matching output bits for the modulation process, the at least one bit corresponding to UCI multiplexing.