DM-RS Port Grouping for Wireless Signal Accuracy
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently providing DM-RS configuration information, which is crucial for accurate signal transmission and reception.
Innovation Solution
The proposed method involves a User Equipment (UE) receiving Downlink Control Information (DCI) from a Base Station (BS) that includes port information for Demodulation Reference Signals (DM-RS). This port information identifies DM-RS ports from multiple groups, with the ports in the second group determined based on those in the first group and an offset.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If DM-RS port information is provided for multiple DM-RS port groups, then the accuracy of signal transmission and reception is improved, but the complexity of configuration information increases
Solution Approach 1:
The DM-RS ports are divided into multiple port groups, where each group is identified by a separate group identifier. This segmentation allows the system to manage multiple DM-RS ports in an organized manner, improving signal transmission accuracy by enabling precise identification of specific port groups while reducing configuration complexity through structured grouping.
Solution Approach 2:
The patent introduces a new dimension of grouping by adding group identifiers to the existing DM-RS port structure. Instead of only identifying individual ports, the system now operates at two levels: port group level (using group identifiers) and individual port level (using port indices within groups). This dimensional expansion resolves the contradiction by providing detailed port identification when needed while allowing coarser-grained group-level management to reduce overall complexity.
2Adaptability or versatility
If multiple DM-RS port groups are supported, then the versatility of the wireless communication system is improved, but the difficulty of detecting and measuring configuration information increases
Solution Approach 1:
The group identifier acts as an intermediary between the downlink control information and the actual DM-RS ports. When the UE receives DCI, it first extracts the group identifier to determine which port group is being referenced, then uses this intermediate information to locate the specific ports within that group. This intermediary layer simplifies the detection process by breaking down the complex task of identifying multiple ports into two simpler steps: identify the group, then identify the ports within the group.
Solution Approach 2:
By segmenting the DM-RS port space into multiple groups with distinct identifiers, the system makes configuration information more detectable and measurable. Each group can be independently identified and managed, reducing the overall difficulty of detecting configuration information while maintaining system versatility.
3Productivity
If DM-RS ports are determined based on offset from first group, then the efficiency of configuration is improved, but the reliability of port identification may be reduced
Solution Approach 1:
The system performs preliminary action by pre-establishing the relationship between DM-RS ports and their group identifiers. The base station configures the UE with information about which ports belong to which groups and what offsets apply. This preliminary configuration enables efficient subsequent operations where only group identifiers and small offset values need to be transmitted in DCI, rather than full port identifiers, thus improving configuration efficiency while maintaining identification reliability through the pre-established mapping.
Solution Approach 2:
The patent uses a copying mechanism where the group identifier serves as a reference that copies or represents a set of related DM-RS ports. Instead of transmitting or storing information about each individual port, the system creates a copy relationship where one group identifier represents multiple ports. This reduces configuration overhead while maintaining reliable port identification through the consistent copying relationship established during initial configuration.
Data Source
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AI summary
The present disclosure relates to a method performed by a user equipment (UE) in a wireless communication system. Specifically, the method includes the steps of: receiving downlink control information (DCI) for a physical downlink shared channel (PDSCH) from a base station (BS); and receiving the PDSCH from the BS on the basis of port information of a demodulation reference signal (DM-RS) included in the DCI, wherein the port information of the DM-RS identifies at least one of DM-RS ports included in a first DM-RS port group and DM-RS ports included in a second DM-RS port group, and the DM-RS ports included in the second DM-RS port group are determined on the basis of the DM-RS ports included in the first DM-RS port group and at least one offset.