Multi-Slot PUSCH Transport Block Sizing for Coverage Enhancement
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Solution Overview
Problem
Existing transport block size (TBS) specifications in 3GPP Release-15 are based on a single slot, which may not be efficient when applied to TBOMS (Transport Block over Multi-Slot PUSCH), leading to inefficiencies in coverage enhancement.
Innovation Solution
A terminal and radio communication method that allocates a physical uplink shared channel across multiple slots, determining transport block size, dividing blocks into code blocks, and applying modulation and coding schemes based on slot allocation, enabling efficient TB processing via TBOMS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the transport block size (TBS) is specified based on a single slot (3GPP Release-15, 16), then the existing TBS specification can be used directly, but the efficiency of TB processing over multiple slots (TBOMS) deteriorates
Solution Approach 1:
The patent introduces dynamic TBS determination based on the number of slots allocated for PUSCH transmission. The control unit calculates the TBS by multiplying the single-slot TBS by the number of slots, allowing the system to adapt dynamically to different multi-slot allocation scenarios and improve TB processing efficiency while maintaining backward compatibility with existing single-slot specifications
Solution Approach 2:
The patent changes the parameter used for TBS calculation from a fixed single-slot basis to a variable multi-slot basis. By introducing the number of slots as a multiplicative factor in the TBS calculation formula, the system achieves efficient TB processing over multiple slots while maintaining ease of application through a straightforward parameter extension
2Reliability
If the physical uplink shared channel is allocated across multiple slots for TBOMS, then coverage enhancement is improved, but the complexity of determining transport block size and coding schemes increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing the relationship between single-slot TBS and multi-slot TBS through a predetermined multiplication rule. The control unit determines the multi-slot TBS by simply multiplying the single-slot TBS by the number of slots, which pre-resolves the complexity of TBS determination for multi-slot allocations and enables coverage enhancement without excessive computational complexity
Solution Approach 2:
The patent achieves universality by creating a unified TBS determination method that works for both single-slot and multi-slot PUSCH allocations. The same basic single-slot TBS calculation is extended to multi-slot scenarios through a simple multiplication rule, making the system universally applicable to different allocation configurations while maintaining manageable complexity for coverage enhancement
3Stability of the object's composition
If the transport block size is determined based on single slot configuration, then the existing specification framework is maintained, but the coding gain and efficiency of multi-slot transmission deteriorates
Solution Approach 1:
The patent applies segmentation by separating the TBS determination into two independent parts: the single-slot TBS calculation (which maintains specification stability) and the multi-slot multiplication factor (which enables coding gain). This segmentation allows the existing specification framework to remain stable while achieving improved coding gain through the optional multi-slot multiplication step
Data Source
AI summary
A terminal receives control information indicating allocation of a physical uplink shared channel in a time domain and allocates the physical uplink shared channel across multiple slots. Based on the control information, the terminal determines a transport block to be transmitted over the physical uplink shared channel.