Sidelink Transport Block Sizing for PSSCH Resource Overhead
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Solution Overview
Problem
Existing sidelink communication systems face challenges in determining optimal transport block sizes for efficient data transmission, particularly in scenarios involving multiple devices and networks, which can degrade performance and reliability, especially in environments with varying traffic conditions and network congestion.
Innovation Solution
A method for determining the optimal transport block size in wireless devices and networks involves analyzing and adapting to varying traffic conditions and network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed transport block sizes are used in sidelink communication, then system simplicity is maintained, but resource utilization efficiency deteriorates under varying traffic conditions
Solution Approach 1:
The patent implements dynamic transport block size determination by evaluating multiple criteria including traffic load, device capabilities, and channel conditions. The transport block size is adjusted based on real-time conditions rather than using fixed values, allowing the system to adapt to varying productivity requirements while managing complexity through structured decision frameworks.
Solution Approach 2:
The system changes the parameter of transport block size based on different operating conditions. By establishing multiple criteria (traffic load thresholds, device capability levels, channel quality indicators) and adjusting the block size parameter accordingly, the system optimizes resource utilization without requiring overly complex processing for each individual condition.
2Productivity
If larger transport block sizes are used, then data transmission efficiency is improved, but transmission reliability deteriorates due to increased error probability
Solution Approach 1:
The patent incorporates feedback mechanisms where the receiving device reports channel quality indicators and the transmitting device adjusts transport block sizes accordingly. This feedback loop allows the system to increase block sizes for efficient transmission when channel conditions permit while reducing block sizes to maintain reliability when errors are detected, thus balancing productivity and reliability dynamically.
Solution Approach 2:
The transport block size is made dynamic rather than static, allowing the system to adjust the balance between transmission efficiency and reliability based on real-time channel conditions. When channel quality degrades, the system automatically reduces block size to maintain reliability; when conditions improve, it increases block size to boost efficiency.
3Speed
If transport block size is optimized for high data rates, then transmission speed is improved, but error correction capability deteriorates
Solution Approach 1:
The system changes the transport block size parameter based on the trade-off between speed and reliability requirements. By establishing criteria that consider both data rate needs and error correction capabilities, the system can select appropriate block sizes that optimize for speed when reliability is sufficient while switching to smaller blocks when error correction becomes compromised.
Data Source
AI summary
A first wireless device receives a radio resource control (RRC) message including a parameter indicating a number of first consecutive symbols of at least one sidelink (SL) reference signal (RS) and a parameter indicating a number of resource elements (REs) of a physical resource block (PRB) overhead for sidelink. A transport block size (TBS) is determined, for a physical sidelink shared channel (PSSCH) in second consecutive symbols of a slot, based on: a product of the number of first consecutive symbols and a number of subcarriers within an RB, and the number of REs of the PRB overhead. The first wireless device transmits, to a second wireless device during the first consecutive symbols of the slot, the at least one SL RS. The first wireless device transmits, to the second wireless device during the second consecutive symbols of the slot, a TB with the TBS via the PSSCH.