Resource Pool Bitmap Alignment for Semi-Persistent Scheduling Stability
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Solution Overview
Problem
Current wireless communication systems face challenges in semi-persistent resource selection and reselection, particularly in relation to the length of a resource pool bitmap, semi-persistent resource allocation/configuration period, and system frame number (SFN) period, leading to excessive resource reselection and instability in data transmission.
Innovation Solution
A method and apparatus for a user equipment (UE) to select resources for data transmission based on sensing, with the ability to reselect resources if transmission fails a predetermined number of times, and aligning the resource pool bitmap length with the semi-persistent resource allocation/configuration period to ensure stable interference measurement and reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If semi-persistent resource allocation is implemented without aligning resource pool bitmap length with allocation period, then resource allocation flexibility is improved, but resource reselection frequency increases excessively
Solution Approach 1:
The patent aligns the resource pool bitmap length with the semi-persistent resource allocation period by configuring the bitmap length to match the allocation period (e.g., 100ms, 200ms, 400ms). This parameter alignment ensures that resource reselection occurs only when necessary, reducing excessive reselection while maintaining allocation flexibility through configurable periods.
Solution Approach 2:
The patent implements periodic resource allocation with defined periods (100ms, 200ms, 400ms) for semi-persistent scheduling. By establishing regular periodic cycles for resource allocation and bitmap updates, the system achieves stable resource usage patterns that prevent excessive reselection while maintaining adaptability through period configuration.
2Duration of action of stationary object
If resource pool bitmap length is increased to cover longer periods, then resource allocation coverage is improved, but system complexity increases
Solution Approach 1:
The patent segments the resource allocation period into manageable bitmap lengths that align with standard periods (100ms, 200ms, 400ms). Instead of using a single large bitmap for extended periods, the system divides coverage into synchronized segments that match the allocation period, reducing processing complexity while maintaining comprehensive coverage.
Solution Approach 2:
The patent provides configurable bitmap length parameters that can be adjusted to match different allocation periods. By allowing dynamic parameter adjustment rather than fixed large bitmaps, the system achieves flexible coverage duration while keeping processing complexity manageable through optimized parameter selection.
3Adaptability or versatility
If frequent resource reselection is performed to adapt to changing conditions, then resource allocation adaptability is improved, but data transmission reliability deteriorates
Solution Approach 1:
The patent establishes periodic resource allocation with defined periods (100ms, 200ms, 400ms) where resource reselection occurs only at period boundaries rather than continuously. This periodic approach maintains adaptability to changing conditions while preventing excessive reselection that would compromise transmission reliability through stable resource usage during each period.
Solution Approach 2:
The patent configurable resource allocation period parameters allow the system to balance adaptability and reliability by adjusting the period length. Longer periods provide stability for reliable transmission, while configurable periods maintain adaptability to changing conditions, resolving the contradiction through parameter optimization.
Data Source
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Figure 2
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AI summary
One embodiment of the present invention relates to a method whereby a terminal transmits data to another terminal in a wireless communication system, the data transmission method comprising the steps of: selecting resources for transmitting multiple pieces of data; and transmitting the multiple pieces of data by using the selected resources, wherein the terminal is configured to execute the transmission through sensing, and if the terminal fails to transmit the data a preset number of times or more in a row, the terminal reselects resources.