DMRS Sequence Embedding for UCI Transmission
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting uplink control information (UCI) as the demodulation reference signal (DMRS) sequence primarily focuses on channel estimation rather than conveying information, limiting the capacity for efficient information transmission in mobile broadband communications.
Innovation Solution
The method involves configuring a DMRS sequence to communicate UCI by selecting from a plurality of sequences stored in memory, combining UCI with payload based on bit size thresholds, and transmitting the wireless communication, allowing for the embedding of control information within the DMRS sequence to enhance data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If DMRS sequence is used primarily for channel estimation, then channel estimation accuracy is improved, but information transmission capacity deteriorates
Solution Approach 1:
The DMRS sequence is designed to perform multiple functions simultaneously: it serves as a reference signal for channel estimation while also carrying uplink control information (UCI) through sequence selection. This multi-functional approach allows the same signal structure to fulfill both channel estimation and information transmission requirements, resolving the contradiction between measurement precision and information capacity.
Solution Approach 2:
Different DMRS sequences from a predefined set are selected based on the UCI payload to be transmitted. By changing the sequence parameter (which sequence to use) rather than modifying the sequence structure itself, the system embeds control information while maintaining the sequence's effectiveness for channel estimation. The base station determines the transmitted sequence based on the UCI payload and selects the corresponding sequence for transmission.
2Reliability
If separate channels are used for control information and data, then reliability is improved, but device complexity deteriorates
Solution Approach 1:
The invention merges control information transmission with data transmission by embedding UCI in the DMRS sequence that is already part of the uplink data transmission. Instead of maintaining separate physical channels for control and data, the control information is multiplexed into the existing data channel's reference signal, reducing channel management complexity while maintaining reliable control information delivery through the robust DMRS structure.
Data Source
AI summary
Aspects of the disclosure relate to wirelessly communicating information by embedding that information in a demodulation reference signal (DMRS) sequence. In some examples disclosed herein, a DMRS sequence may be configured to communicate uplink control information (UCI) in an uplink (UL) communication. Other aspects, configurations, and features are also claimed and described.