Coordinated Transmission DCI Merging for Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication systems face challenges in handling explosively increasing data traffic, requiring advanced technologies for higher per-user transmission rates, numerous device connections, low end-to-end latency, and high-energy efficiency, particularly in coordinating transmission by multiple transmission/reception points (TRPs).
Innovation Solution
A method for coordinated transmission by multiple TRPs involves receiving downlink control information (DCI) from multiple base stations, where each station transmits a separate transmission layer, and the total number of layers scheduled for a user equipment (UE) and demodulation reference signal (DMRS) grouping information are indicated by a single piece of information in the DCI, enabling dynamic transmission of necessary information for coordinated transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple base stations perform coordinated transmission to a UE, then data transmission efficiency and per-user transmission rate are improved, but control information overhead and system complexity increase
Solution Approach 1:
The patent merges the control information from multiple base stations into a single DCI message. Specifically, DMRS grouping information and total layer information from multiple TRPs are combined and transmitted through one DCI, reducing control overhead while maintaining coordinated transmission benefits. This is achieved by consolidating what would otherwise be separate control messages into a unified structure that the UE can process efficiently.
Solution Approach 2:
The single DCI message serves multiple functions simultaneously: it schedules downlink data, indicates DMRS grouping information for multiple TRPs, provides total layer information, and conveys quasi-colocation information. This multi-functionality reduces the need for separate control messages and minimizes system complexity while enabling coordinated transmission from multiple base stations.
2Productivity
If separate transmission layers are transmitted from each base station in coordinated transmission, then per-user transmission rate is improved, but control information overhead increases
Solution Approach 1:
The patent combines multiple control information elements into a single DCI message. Specifically, the DMRS grouping information that would indicate separate transmission layers from multiple TRPs is merged with total layer information and other control data into one unified DCI, reducing control overhead while maintaining the ability to transmit multiple layers from different base stations.
3Measurement precision
If DMRS grouping information and total layer information are indicated by separate information in DCI, then transmission accuracy is improved, but DCI message size and processing complexity increase
Solution Approach 1:
The patent merges DMRS grouping information and total layer information into a single field within the DCI message. This consolidation maintains the precision needed for accurate transmission by preserving all necessary information, while reducing the overall DCI message size and simplifying UE processing by eliminating the need to handle multiple separate information elements.
Data Source
AI summary
A method for performing coordinated transmission in a wireless communication system and an apparatus therefor are disclosed. Specifically, a method for receiving downlink control information (DCI) by a user equipment (UE) in a wireless communication system may comprise the steps of: receiving the DCI from one of a plurality of base stations performing coordinated transmission to the UE; and receiving downlink data scheduled on the basis of the DCI from the plurality of base stations performing the coordinated transmission, wherein a separate transmission layer for the downlink data is transmitted from each base station included in the plurality of base stations, and single piece of information in the DCI indicates a total number of layers scheduled to the UE and demodulation reference signal (DMRS) grouping information associated with the separate transmission layer transmitted from each base station.