Multi-TRP Data Transmission Reliability via Segmented PDSCH
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Solution Overview
Problem
Existing multi-TRP data transmission schemes in LTE and 5G networks suffer from reliability issues due to interference among multiple PDSCHs using the same time-frequency resources or sharing a PDSCH, leading to low data transmission reliability.
Innovation Solution
A method involving generating resource allocation and QCL instructions based on the mapping relationship between transmission coding blocks and multiple TRPs, using DCI to indicate allocated resources and QCL identifiers, enabling separate data transmission and reception from multiple TRPs, and providing data merging and detection instructions to improve reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PDSCHs use the same time-frequency resources to transmit different data from multiple TRPs, then data transmission rate is improved, but interference between PDSCHs increases and reliability decreases
Solution Approach 1:
The patent segments the data transmission by dividing it into multiple codeblocks, where each codeblock is transmitted through a separate PDSCH from a different TRP. This segmentation allows parallel transmission to improve rate while the separate transmission paths reduce interference and enhance reliability through diversity.
Solution Approach 2:
The patent introduces spatial dimension by utilizing multiple TRPs (transmission reception points) located at different spatial positions. By transmitting data through multiple spatial dimensions simultaneously, the system achieves both high transmission rate and reliability through spatial diversity, resolving the contradiction between rate and reliability.
2Productivity
If a single PDSCH carries multiple data streams from multiple TRPs, then resource utilization is improved, but interference between data streams increases and reliability decreases
Solution Approach 1:
Instead of combining multiple data streams into a single PDSCH, the patent segments them into separate PDSCHs, each carrying one codeblock from one TRP. This segmentation eliminates intra-PDSCH interference while maintaining resource utilization efficiency through coordinated scheduling.
Solution Approach 2:
The patent applies local quality by assigning different transmission characteristics to different PDSCHs based on their respective TRPs and channel conditions. Each PDSCH can be optimized independently with appropriate modulation, coding, and resource allocation, improving both resource utilization and reliability.
3Adaptability or versatility
If multiple PDCCHs are used to schedule multiple PDSCHs from multiple TRPs, then transmission flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple PDCCH scheduling functions into a coordinated scheduling framework where a single PDCCH can schedule multiple PDSCHs from different TRPs. This merging reduces signaling overhead while preserving transmission flexibility through unified resource allocation and QCL indication mechanisms.
Solution Approach 2:
The patent enhances the universality of the PDCCH by enabling it to perform multiple scheduling functions simultaneously - scheduling multiple PDSCHs from different TRPs with different QCL assumptions. This multi-functionality reduces the need for separate control channels while maintaining full transmission flexibility.
Data Source
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AI summary
Disclosed are a method for processing multi-transmission reception point (TRP) data, a base station, a terminal, and a storage medium, used for solving the technical problem in the prior art of low reliability of data transmission when data is transmitted by using multiple TRPs. The method comprises: a base station generates a resource allocation instruction and a quasi co-location (QCL) instruction according to the mapping relations between a transmission coding block of data to be transmitted and multiple TRPs, wherein the QCL instruction is used for indicating the associations between an allocated resource and the QCL identifiers of the multiple TRPs, and the allocated resource comprises a time-frequency resource or a demodulation reference signal (DMRS) port resource; and sends downlink control information (DCI) to a user terminal, the DCI comprising at least the resource allocation instruction and the QCL instruction as well as a data merging and detection instruction, so as to instruct the user terminal to perform, according to the mapping relation between resource allocation and QCL, merging, encoding and detection on data signals received from the multiple TRPs.