Message Mapping via Frequency and Time Indexing
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Solution Overview
Problem
Device-to-device (D2D) wireless communication systems face challenges in reducing signaling overhead and improving decoding performance due to high coding rates required for discovery messaging, especially in scenarios with varying device capabilities and characteristics.
Innovation Solution
The use of frequency and/or time indexing for conveying information in device-to-device wireless communications, specifically through subcarrier and slot indexing, to reduce signaling overhead and improve decoding performance by allowing lower coding rates during device discovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional discovery messaging is used in D2D communication, then device discovery can be achieved, but signaling overhead increases and decoding performance deteriorates due to high coding rates
Solution Approach 1:
The patent extracts and removes redundant signaling elements from the discovery message. By identifying and eliminating unnecessary signaling overhead components, the system reduces the total message size and allows for lower coding rates, thereby improving decoding performance while maintaining essential discovery functionality.
Solution Approach 2:
The patent changes the coding rate parameter from high to low by optimizing the message structure. This parameter change is enabled by removing redundant elements and reorganizing the message format, which directly improves decoding performance while reducing signaling overhead.
2Reliability
If high coding rates are used for discovery messaging, then reliability of message transmission is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts and removes redundant signaling elements from the discovery message. By identifying and eliminating unnecessary signaling overhead components, the system reduces the total message size and allows for lower coding rates, thereby improving decoding performance while maintaining essential discovery functionality.
Solution Approach 2:
The patent changes the coding rate parameter from high to low by optimizing the message structure. This parameter change is enabled by removing redundant elements and reorganizing the message format, which directly improves decoding performance while reducing signaling overhead.
3Adaptability or versatility
If comprehensive device information is transmitted during discovery, then device capabilities are better characterized, but message size and signaling overhead increase
Solution Approach 1:
The patent segments device information into essential and non-essential categories. Only the most critical device capabilities and characteristics are included in the discovery message, while less important information is omitted or transmitted separately. This segmentation allows for better device capability characterization with reduced message size.
Solution Approach 2:
The patent extracts and removes redundant signaling elements from the discovery message. By identifying and eliminating unnecessary signaling overhead components, the system reduces the total message size and allows for lower coding rates, thereby improving decoding performance while maintaining essential discovery functionality.
Data Source
AI summary
This disclosure relates to techniques for supporting message mapping via time and/or frequency indexing. For example, these techniques may be applied to device-to-device wireless communication. For example, device to device discovery may use message mapping via frequency indexing. A portion of the payload of a message, such as a discovery message, may be offloaded to a frequency and/or time index. A receiving device may determine the offloaded portion of the payload based on the frequency and/or time (e.g., subcarrier and/or slot) used to transmit the message.