Soft Combining Control Transmissions With Deterministic Field Modification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, control transmissions are not effectively soft combined due to varying content between transmissions, leading to difficulties in decoding and resource allocation identification, resulting in increased delay and power consumption.
Innovation Solution
A method for soft combining control transmissions by identifying and modifying fields with deterministic and non-deterministic bit changes, allowing for improved decoding and resource allocation identification through buffering and LLR combination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control transmissions are soft combined without modification, then decoding complexity is reduced, but decoding accuracy deteriorates due to varying content between transmissions
Solution Approach 1:
The control transmission is segmented into multiple fields, where some fields are modified to have deterministic bit changes while others remain unchanged. This segmentation allows the receiver to identify and soft combine only the consistent portions, improving decoding accuracy without excessive complexity
Solution Approach 2:
The patent modifies specific fields within the control transmission to have deterministic bit changes between transmissions. By controlling which parameters (fields) change and how they change, the system enables reliable soft combining while maintaining adaptability for different transmission scenarios
2Reliability
If all fields are modified for deterministic changes, then soft combining accuracy is improved, but device complexity increases due to field identification and modification operations
Solution Approach 1:
Instead of modifying all fields, the patent applies partial modification only to specific fields that benefit from deterministic changes. This selective approach achieves sufficient soft combining accuracy while minimizing the complexity of field identification and modification operations
3Adaptability or versatility
If control transmissions are retransmitted with different content, then communication adaptability is improved, but soft combining becomes difficult or impossible
Solution Approach 1:
The patent introduces dynamic field modification where certain fields are adjusted based on transmission conditions while maintaining deterministic relationships. This dynamic approach allows the system to adapt to different communication scenarios while preserving the ability to perform soft combining on consistent portions
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Techniques are described for wireless communication. One method of wireless communication includes buffering a first set of coded bits including a first control message having a plurality of fields, buffering a second set of coded bits including a second control message having the plurality of fields, soft combining at least a first subset of the first set of coded bits and a second subset of the second set of coded bits in a combined set of coded bits, and decoding the first control message or the second control message based at least in part on the combined set of coded bits.