Transport Block Boundary Flexibility in Wireless TTI
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing transport block boundaries, particularly in carrier aggregation, which leads to increased signaling overhead, communication latency, and buffer burdens due to rigid alignment requirements with transmission time intervals (TTIs), limiting flexibility and data processing efficiency.
Innovation Solution
The solution involves determining and transmitting multiple blocks within a single TTI, where each block spans a shorter period than the TTI, with flexible alignment of leading and trailing boundaries with symbol or code block boundaries, allowing for improved alignment flexibility and reduced buffer burdens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transport blocks are rigidly aligned with TTI boundaries, then synchronization and timing coordination are simplified, but transmission flexibility and data processing efficiency are reduced
Solution Approach 1:
The transport block is segmented into multiple code blocks, each of which can be independently processed and transmitted. This segmentation allows the system to maintain TTI-level synchronization while enabling flexible handling of individual code blocks, resolving the contradiction between rigid timing alignment and transmission flexibility.
Solution Approach 2:
The patent introduces dynamic boundary alignment where code block boundaries can be flexibly positioned within the TTI structure. Rather than fixed rigid alignment, the system dynamically adjusts code block boundaries to optimize transmission while maintaining synchronization, thereby achieving both timing coordination and transmission flexibility.
2Reliability
If all blocks are buffered before processing, then data integrity and error handling are improved, but latency and buffer burden increase
Solution Approach 1:
The patent implements preliminary processing of code blocks as they arrive, rather than waiting for complete buffering. Error detection and initial processing actions are taken on individual code blocks before all blocks are received, reducing latency while maintaining data integrity through subsequent cross-block error correction mechanisms.
Solution Approach 2:
The system implements feedback mechanisms where processing results of individual code blocks are immediately available, allowing for real-time error detection and correction. This feedback approach enables partial processing without complete buffering, reducing latency while maintaining reliability through iterative error handling.
3Productivity
If multiple blocks are transmitted within a single TTI, then transmission efficiency is improved, but boundary alignment complexity and signaling overhead increase
Solution Approach 1:
By segmenting the transport block into multiple code blocks with defined boundary alignment rules, the patent enables efficient multiplexing within a single TTI. The segmentation provides a structured approach to handling multiple blocks, reducing the complexity of boundary management while improving transmission efficiency through parallel processing capabilities.
Data Source
AI summary
Methods and apparatus for providing transport block boundary flexibility are disclosed. In some aspects, a transmitter determines a plurality of blocks within a single transmission time interval (TTI), and transmits the plurality of blocks within the single TTI. Each of the plurality of blocks spans over a pre-defined period of time that is shorter than the single TTI. Each of the plurality of blocks includes data having a same logic channel identifier and a same header. A leading boundary and a trailing boundary of each of the plurality of blocks are aligned with one of: a leading boundary and a trailing boundary of a symbol; or a leading boundary and a trailing boundary of a code block. In additional aspects, a receiver receives these plurality of blocks within a single transmission time interval (TTI), and decodes a plurality of protocol data units in the plurality of blocks.