DMRS Port Allocation for Coordinated Multi-Panel Uplink Transmission
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Solution Overview
Problem
Existing wireless communication systems lack flexible methods for assigning demodulation reference signal (DMRS) ports to different antenna panels during uplink transmission, particularly in scenarios involving coordinated multiple TRPs, which affects communication reliability and efficiency.
Innovation Solution
A method and apparatus for DMRS port allocation that involves reading a DMRS port allocation table based on configuration information and RANK layers, determining DMRS port configurations to support RANK combinations for different TRP directions on different panels, and ensuring quasi-co-location of DMRS ports for improved communication reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional DMRS port allocation methods are used, then the system is simple to implement, but the system lacks flexibility in assigning DMRS ports to different antenna panels
Solution Approach 1:
The patent segments the DMRS port allocation process by introducing separate indication fields for different antenna panels. Each panel can be independently configured with its own DMRS port assignments, allowing flexible allocation while maintaining structured management through the segmented indication approach in the uplink grant.
Solution Approach 2:
The patent adds a new dimension to the DMRS allocation system by introducing panel-specific indication fields alongside the traditional layer-based allocation. This multi-dimensional approach (combining panel dimension with layer dimension) enables flexible port assignment to different panels without fundamentally complicating the existing allocation framework.
2Reliability
If DMRS ports are allocated for multiple TRP directions, then communication reliability is improved, but resource overhead increases
Solution Approach 1:
The patent implements dynamic DMRS port allocation where the number and assignment of DMRS ports are adapted based on the actual transmission scenario. The system can dynamically adjust the DMRS configuration for each panel and TRP direction, allocating resources only where needed rather than using fixed overhead for all scenarios.
Solution Approach 2:
The patent changes key parameters of the DMRS allocation including the number of DMRS ports, the assignment of specific ports to different panels, and the configuration of indication fields. These parameter changes allow the system to optimize the balance between reliability (through multi-TRP support) and resource overhead (through efficient port utilization).
Data Source
AI summary
A demodulation reference signal port allocation method for coordinated multi-antenna panel transmission. The method includes: reading a DMRS port allocation table based on DMRS configuration information and a number of RANK layers for data transmission, in which the DMRS port allocation table includes at least one DMRS port configuration, the at least one DMRS port configuration corresponds to a physical uplink shared channel (PUSCH) for coordinated transmission to a transmission reception pair (TRP) based on multiple antenna panels, and the DMRS configuration information includes a DMRS type and a maximum number of front-load DMRS symbols; and querying the DMRS port allocation table according to DMRS port allocation information, to determine a DMRS port configuration, in which the DMRS port configuration is used to support RANK combinations for sending data transmission layers in different TRP directions on different panels.