Subcode Remapping for Nonuniform Wireless Message Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies due to arbitrary mapping of messages to subcodes, leading to increased error rates and reduced reliability, particularly for messages with higher transmission probabilities.
Innovation Solution
Implement a subcode mapping scheme that orders subcodes by error probability, ensuring messages with higher transmission probabilities are mapped to subcodes with lower error probabilities, using techniques like modified Reed Muller codes and polar codes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If arbitrary mapping of messages to subcodes is used, then device complexity is reduced, but error rates increase and reliability deteriorates
Solution Approach 1:
The patent applies parameter changes by systematically varying the mapping between message parameters (probability of transmission) and subcode parameters (error probability characteristics). By establishing a deterministic mapping rule where messages with higher transmission probabilities are assigned to subcodes with lower error probabilities, the system transforms the arbitrary mapping into a parameter-optimized mapping, thereby improving reliability without substantially increasing complexity
Solution Approach 2:
The patent implements local quality by assigning different subcodes with different error probability characteristics to different messages based on their specific transmission probability requirements. Instead of using a uniform mapping approach, the system tailors the subcode selection to the local characteristics of each message, ensuring that high-probability messages receive more robust encoding while low-probability messages use simpler subcodes, thus optimizing overall system reliability
2Reliability
If subcode mapping based on communication probability metrics is implemented, then error rates decrease, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing the mapping relationship between communication probability metrics and subcode error probability metrics before actual message transmission. The mapping table or mapping rules are prepared in advance, allowing the transmitting device to quickly determine the appropriate subcode based on the message's probability characteristics without performing complex real-time calculations, thus reducing operational complexity while maintaining reliability benefits
Solution Approach 2:
The patent uses copying by creating a predefined mapping structure (such as a lookup table) that stores the relationship between message probability metrics and subcode error probability metrics. This mapping structure is copied or replicated between transmitting and receiving devices, allowing both ends to apply the same mapping logic without requiring complex computational algorithms, thereby reducing device complexity while achieving improved reliability
3Productivity
If messages are mapped to subcodes without considering error probability, then processing speed is maintained, but retransmission rate increases
Solution Approach 1:
The patent applies segmentation by dividing the set of all possible subcodes into different groups or segments based on their error probability characteristics. Messages are then segmented and assigned to appropriate subcode segments according to their transmission probability. This segmentation allows the system to process different types of messages through optimized paths, reducing the need for retransmissions while maintaining high processing speed for the overall system
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first device may obtain a first message bit combination that includes a first quantity of bits for inclusion in a message to be transmitted by the first wireless device. The first device may encode the first set of bits using a first subcode that is mapped to the first message bit combination of a set of message bit combinations in accordance with a subcode mapping scheme, each of the set of message bit combinations having the first quantity of bits. The subcode mapping scheme may be based on a set of communication probability metrics for the set of message bit combinations and a set of error probability metrics for a set of subcodes that comprises the first subcode. The first device may output the message comprising the encoded first set of bits.