Multi-Panel Uplink Transmission via Dual SRI Antenna Port Mapping
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Solution Overview
Problem
Existing technologies face challenges in supporting non-codebook-based (NCB-based) simultaneous transmission across multiple panels (STxMP) due to issues with SRS resource configuration, UE capability reporting, and SRS resource indicator indication, which hinder effective utilization of multiple antenna panels for improved transmission performance.
Innovation Solution
The proposed solution involves configuring two SRS resource sets for STxMP with two SRS resource indicators in single DCI, defining a default panel associated with a bandwidth part (BWP), and implementing methods for determining antenna port indexes based on SRS resource indicators to facilitate simultaneous uplink transmissions across multiple antenna sets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal device is equipped with multiple antenna panels, then transmission performance can be improved through simultaneous transmission, but the complexity of SRS resource configuration and DCI indication increases
Solution Approach 1:
The patent segments SRS resources into multiple sets (first SRS resource set and second SRS resource set), each associated with different antenna panels. This segmentation allows independent configuration and management of SRS resources for each panel, reducing overall configuration complexity while enabling simultaneous multi-panel transmission.
Solution Approach 2:
The patent introduces a new dimension for resource indication by adding multiple SRS resource indicators (first SRI and second SRI) in the DCI, moving from single-panel indication to multi-panel indication. This dimensional expansion enables the system to address multiple antenna panels simultaneously without overwhelming complexity.
2Adaptability or versatility
If multiple SRS resource indicators are included in single DCI for multi-panel transmission, then transmission flexibility is improved, but the size and complexity of DCI increases
Solution Approach 1:
The DCI structure is designed with multi-functionality to handle both single-panel and multi-panel transmissions. By incorporating optional first and second SRS resource indicators that can be selectively activated based on transmission mode, the DCI maintains universality across different transmission scenarios without requiring entirely separate signaling structures.
Solution Approach 2:
The DCI structure is made dynamic through conditional inclusion of SRS resource indicators. The first SRI and second SRI are included based on transmission mode indicators, allowing the DCI size and content to adapt dynamically to the specific transmission requirements, thus balancing flexibility with complexity management.
3Reliability
If antenna port indexes are determined based on SRS resource indicators for each panel, then transmission coordination is improved, but the complexity of antenna port management increases
Solution Approach 1:
The patent establishes preliminary mapping relationships between SRS resources and antenna ports before actual transmission. Each SRS resource in the first and second sets is pre-associated with specific antenna ports, allowing the terminal device to quickly determine antenna port indexes based on SRS resource indicators without complex real-time calculations during transmission.
Solution Approach 2:
The patent uses a copying approach where antenna port index determination for multi-panel transmission follows the same procedural logic as single-panel transmission. The terminal device copies the established single-panel antenna port mapping methodology and applies it to each panel independently, simplifying the management of multiple antenna ports through familiar procedures.
Data Source
AI summary
Embodiments of the present disclosure relate to method, device and computer readable medium of communication. A terminal device deployed with first and second sets of antenna ports receives DCI for scheduling an uplink transmission, the DCI comprising a first SRI and a second SRI. The terminal device determines a first set of antenna port indexes based on a first number of layers of the uplink transmission indicated by the first SRI and indexes of SRS resources in a first set of SRS resources, and determines a second set of antenna port indexes based on indexes of SRS resources in a second set of SRS resources, a second number of layers of the uplink transmission indicated by the second SRI and the number of SRS resources in the first set of SRS resources. Then the terminal device performs the uplink transmission over antenna ports corresponding to the first and second sets of antenna port indexes. In this way, a simultaneous transmission across multi-panels is well supported.