Sidelink TBS Adjustment Indicator for Wireless Communication

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Solution Overview

Problem

In wireless communication systems, transport block size (TBS) mismatches between transmitting and receiving devices can lead to data loss or inefficiency due to zero padding or incorrect decoding, especially in scenarios where parameters change during transmission.

Innovation Solution

The implementation of a TBS adjustment indicator, which is transmitted via sidelink, allows receiving devices to adjust the expected TBS to match the actual TBS by using scaling factors, offset values, or parameter adjustments, ensuring accurate data reception and reducing data loss.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If TBS is determined based on protocol specifications using a first set of parameters, then the transmission follows standard procedures, but TBS mismatches occur when parameters change during transmission leading to data loss or inefficiency

Engineering Contradiction:

Improvedata reception accuracyVSAvoidparameter change adaptability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent implements a feedback mechanism where the transmitting device sends a TBS adjustment indicator to the receiving device. This indicator provides information about the actual TBS used, allowing the receiving device to adjust its expectations and correctly decode the transport block even when parameters change during transmission.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent applies preliminary action by having the transmitting device calculate and communicate the TBS adjustment indicator before the receiving device attempts to decode the transport block. This allows the receiving device to pre-adjust its TBS calculation based on the indicated adjustment value, preventing decoding errors.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If TBS adjustment indicator is transmitted via sidelink, then receiving devices can adjust expected TBS to match actual TBS, but this requires additional signaling overhead

Engineering Contradiction:

ImproveTBS matching accuracyVSAvoidsignaling complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by making the TBS adjustment indicator optional rather than universally applied. The indicator is transmitted only when parameter changes occur that would affect TBS calculation, allowing systems to maintain simple operation when no adjustments are needed while providing enhanced reliability when necessary.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11558142B2Transport block size (TBS) adjustment indication in sidelink

Publication Date: 2023.01.17 QUALCOMM INC

AI summary

An apparatus for wireless communication includes a receiver and a transmitter. The transmitter is configured to transmit of a transport block (TB) via a sidelink that is associated with a wireless communication protocol. The wireless communication protocol specifies that a first transport block size (TBS) associated with the TB is based on a first set of parameters. The transmitter is further configured to transmit sidelink control information (SCI) associated with the TB via the sidelink, and the SCI includes a TBS adjustment value associated with the first TBS.