Frozen-Bit UE ID Scrambling for Early DCI Blind Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in blind decoding procedures for downlink control information (DCI) due to the need for extensive search across candidate locations, which consumes significant time and computational resources, especially in scenarios with intercell interference.
Innovation Solution
The implementation of scrambling sequence design using unique identifiers for both the transmitter and receiver, where separate scrambling masks are applied to disparate bit fields within a coded DCI message, allowing for early termination of the decoding process and mitigating intercell interference through polar code modulation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind decoding is performed across all candidate locations to ensure reliable message reception, then message delivery reliability is improved, but computational resources and time consumption increase significantly
Solution Approach 1:
The patent applies preliminary action by embedding receiver identifiers into frozen bits before the decoding process begins. This allows the receiver to verify its intended status early in the decoding process and terminate prematurely if not the intended recipient, avoiding the need to complete full blind decoding for all candidate locations. The identifier embedding is performed in advance as part of the encoding process, enabling efficient filtering at the receiver side.
Solution Approach 2:
The patent segments the DCI message structure by designating specific frozen bits to carry receiver identifier information, separate from the actual control data. This segmentation allows the receiver to independently verify its identity without processing the entire message, thereby reducing computational complexity while maintaining reliable message delivery for intended recipients.
2Reliability
If blind decoding is performed across all candidate locations to ensure no message is missed, then message detection completeness is improved, but time consumption increases
Solution Approach 1:
The patent performs preliminary embedding of receiver identifiers in frozen bits before transmission. At the receiver side, this enables early verification of intended status during the decoding process, allowing premature termination for non-intended messages. This preliminary setup ensures that intended messages are detected completely while avoiding time waste on non-intended candidate locations.
Solution Approach 2:
The patent applies partial action by performing complete decoding only for candidate locations where the receiver identifier matches, while performing partial decoding (early termination) for non-matching candidates. This selective approach ensures message detection completeness for intended messages while significantly reducing time consumption by avoiding full decoding of irrelevant candidates.
3Object-affected harmful factors
If separate scrambling masks are applied to different bit fields using unique identifiers, then intercell interference mitigation is improved, but encoding complexity increases
Solution Approach 1:
The patent segments the DCI message into different bit fields (frozen bits and information bits) and applies separate scrambling masks to each segment using different identifiers (receiver ID for frozen bits, transmitter ID for information bits). This segmentation effectively mitigates intercell interference by ensuring that messages from different cells or intended for different receivers can be distinguished, while the encoding complexity increase is managed through systematic application of the scrambling process.
Solution Approach 2:
The patent applies local quality by using different scrambling masks for different portions of the message based on their specific requirements. Frozen bits use a receiver-specific mask for early identification, while information bits use a transmitter-specific mask for interference mitigation. This localized approach optimizes interference protection for each bit field according to its functional requirements.
Data Source
AI summary
Methods and devices are described for encoding and decoding control information that has been modulated based on one or more identifiers of the transmitter and/or receiver. Some embodiments describe scrambling sequence design for multi-mode block discrimination on downlink control information (DCI) blind detection. Separate scrambling masks may be applied to disparate bit fields within a coded DCI message, wherein each of the scrambling masks is derived from a unique identifier associated with either the transmitter or the intended receiver. The scrambling masks may be used by the receiver to perform early termination of the decoding process, to mitigate intercell interference, and to verify that the receiver is the intended receiver.