Wireless TTI Bit Mapping for Vulnerable Symbol Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in device-to-device and vehicle-to-everything networks, vulnerable symbols within a transmission time interval (TTI) are often misinterpreted by receivers, leading to performance degradation due to higher priority information being transmitted in symbols considered low priority by the receiver, resulting in significant reduction in communication performance.
Innovation Solution
A method and apparatus that determine the priority of transmission resources within a TTI, processing messages to prioritize systematic bits over parity bits by identifying and mapping higher priority coded bits to more reliable transmission resources, thereby increasing the likelihood of successful reception despite the presence of vulnerable symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high priority information is transmitted in symbols that are not considered high priority by the receiver, then transmission resources are utilized, but communication performance significantly degrades
Solution Approach 1:
The transmitter performs preliminary actions by determining the priority of each symbol in the TTI before transmission and processing the message to map systematic bits to high priority symbols and parity bits to low priority symbols. This advance preparation ensures that critical information is placed in reliable transmission resources, preventing performance degradation while maintaining efficient resource utilization.
Solution Approach 2:
The patent applies local quality by differentiating the treatment of different symbols within the TTI. Instead of uniform treatment, the system identifies specific high priority symbols and low priority symbols, and applies different bit mapping strategies to each. Systematic bits are concentrated in high priority symbols while parity bits are placed in low priority symbols, optimizing the local quality of each symbol's contribution to overall communication reliability.
2Device complexity
If systematic bits are mapped to vulnerable symbols, then transmission is simplified, but reception reliability decreases
Solution Approach 1:
The transmitter performs preliminary analysis of symbol priorities within the TTI before message transmission. By determining which symbols are high priority and which are low priority in advance, the system can systematically map bits without increasing reception complexity. The receiver simply needs to know the TTI structure and can reliably extract systematic bits from high priority symbols.
Solution Approach 2:
The patent applies local quality by concentrating systematic bits in high priority symbols and parity bits in low priority symbols. This differentiated mapping strategy ensures that the most critical information (systematic bits) is transmitted through reliable channels while maintaining a relatively simple transmission structure that does not significantly increase device complexity.
3Reliability
If parity bits are transmitted in high priority symbols, then error correction capability is enhanced, but transmission of critical information in low priority symbols fails
Solution Approach 1:
The patent applies local quality by strategically distributing different bit types to different symbol priorities. Systematic bits (critical information) are mapped to high priority symbols to ensure their reliable transmission, while parity bits (error correction data) are mapped to low priority symbols. This localized optimization ensures that critical information is preserved while error correction capability is maintained through the presence of parity bits in the transmitted signal.
Solution Approach 2:
The patent extracts and separates the functions of systematic bits and parity bits into different symbol categories. By taking out systematic bits and placing them exclusively in high priority symbols, and parity bits in low priority symbols, the system ensures that critical information transmission is not compromised by the presence of vulnerable symbols, while still providing error correction capability where possible.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first device may identify that a first set of transmission resources in a transmission time interval (TTI) has a higher priority at a second device than a second set of transmission resources in the TTI. The first device may identify that a message is to be transmitted from the first device to the second device via the TTI and process the message into a bit sequence based on the identification of the second set of transmission resources in the TTI, where the processing increases a likelihood that systematic bits of the message are received at the second device despite presence of the second set of transmission resources in the TTI. The first device may transmit the bit sequence to the second device via the TTI.