Multi-port-group UCI Signaling for 5G Feedback Overhead Reduction
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Solution Overview
Problem
In 5G wireless communication systems, the increasing number of network elements leads to increased overhead and power consumption in user equipment (UE) due to the need for individual feedback transmissions for each network element, which hampers signaling efficiency and contradicts the goals of enhanced spectral efficiency and reduced latency.
Innovation Solution
The implementation of a multi-port-group uplink control information (UCI) signaling method, where the UE generates a single multi-port-group UCI signal containing feedback information for multiple Demodulation Reference Signal (DMRS) Port Groups (DMRS-PGs), and the network entity processes this signal to associate feedback with specific DMRS-PGs, reducing overhead and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual UCI signals are transmitted for each network element, then feedback information can be accurately provided to each network element, but overhead and power consumption increase
Solution Approach 1:
The patent combines multiple individual UCI feedback signals into a single multi-port-group UCI signal that carries feedback information for multiple DMRS port groups simultaneously. This merging approach reduces the number of separate transmissions required, thereby lowering power consumption and overhead while maintaining the ability to provide accurate feedback to each network element through multiplexing techniques.
Solution Approach 2:
The multi-port-group UCI signal is designed to serve multiple network elements and multiple DMRS port groups simultaneously. By creating a universal feedback mechanism that can address multiple recipients in a single transmission, the system achieves both energy efficiency and comprehensive feedback coverage without sacrificing accuracy.
2Reliability
If individual UCI signals are transmitted for each network element, then feedback information can be accurately provided to each network element, but signaling efficiency decreases
Solution Approach 1:
Multiple UCI signals are merged into a single multi-port-group UCI transmission that efficiently carries feedback for multiple DMRS port groups. This consolidation reduces the total number of signaling operations required, improving spectral efficiency and system productivity while maintaining feedback accuracy through proper signal structure and multiplexing.
Solution Approach 2:
The patent introduces a new dimension of organization by grouping multiple DMRS port groups together in a single UCI signal structure. This dimensional reorganization allows feedback information to be efficiently multiplexed and transmitted in a unified signal, improving signaling efficiency without compromising the ability to accurately deliver feedback to each network element.
3Adaptability or versatility
If the number of network elements increases, then system capacity increases, but overhead and power consumption increase
Solution Approach 1:
The multi-port-group UCI signal creates a universal feedback mechanism that scales efficiently with the number of network elements. Instead of requiring separate feedback transmissions for each additional network element, the system uses a unified signal structure that can accommodate multiple port groups, thereby supporting increased system capacity without proportionally increasing power consumption.
Solution Approach 2:
The patent changes the organizational parameters of feedback signaling by introducing port group identifiers and structured multiplexing schemes. This parameter reorganization allows the system to efficiently handle a larger number of network elements and port groups without linearly increasing overhead or power consumption, as the feedback information is compactly encoded and transmitted in a unified structure.
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AI summary
A method in accordance with aspects of the disclosure comprises receiving a plurality of downlink control information (DCI) signals, wherein each DCI signal is associated with a Demodulation Reference Signal (DMRS) Port Group (DMRS-PG) of a plurality of DMRS-PGs, and each DCI signal within the plurality of DCI signals contains a DMRS-PG Identifier (DMRS-PGID) identifying the associated DMRS-PG, performing one or more measurements associated with the each DCI signal, and generating a multi-port-group uplink control information (UCI) signal based on the one or more measurements associated with the each DCI, wherein the multi-port-group UCI signal contains an indication of whether the each DCI is successfully received. The indication can be explicitly contained in the UCI, or implicitly realized using scrambling sequences associated with DMRS-PGs to scramble the UCI.