Configured-Grant TB Start Position Selection from RV Sequences
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Solution Overview
Problem
In existing communication systems, determining the optimal start transmission position for a transport block (TB) across multiple slots is challenging, particularly in configured grant (CG) mode, which affects transmission efficiency and reliability.
Innovation Solution
A method and apparatus for determining the redundancy version (RV) sequence across multiple slots within a CG period to identify the start transmission position of a TB, allowing for timely and reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TB transmission spans multiple slots in CG mode, then transmission reliability is improved through redundancy, but determining the optimal start transmission position becomes complex and delays increase
Solution Approach 1:
The patent changes the parameter of RV sequence configuration to optimize transmission. By configuring the RV sequence at the MAC layer and allowing flexible selection of start transmission positions based on different RV values (0, 1, 2, 3), the system can adapt to different channel conditions and traffic requirements, thereby improving reliability while reducing delay through optimal parameter selection
Solution Approach 2:
The patent introduces dynamic selection of start transmission positions within the CG period. Instead of fixed positioning, the terminal can dynamically determine which slot to start transmission based on data arrival timing, buffer status, and configured RV sequences, enabling flexible adaptation to varying transmission conditions and reducing unnecessary delays
2Reliability
If multiple slots are used for TB transmission, then data redundancy is increased for better reliability, but the complexity of determining start transmission position increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the RV sequence at the MAC layer before transmission occurs. The network configures multiple RV sequences in advance, and the terminal prepares the corresponding start transmission position candidates based on these pre-configured sequences, eliminating the need for complex real-time calculations and reducing determination complexity
Solution Approach 2:
The patent segments the CG period into multiple candidate start transmission positions, each associated with a specific RV value. By dividing the transmission opportunity into discrete, pre-defined segments (slots with specific RV assignments), the system simplifies the selection process compared to evaluating all possible continuous positions
Data Source
AI summary
A method for determining a start transmission position of a TB includes: determining a redundancy version (RV) sequence of a plurality of time slots for transmitting a same TB in a CG period, and determining at least one start position of the TB from the plurality of time slots corresponding to the RV sequence.