Multi-Panel 5G Downlink HARQ Scheduling for Joint Data Decoding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G NR systems, handling the Hybrid Automatic Repeat reQuest (HARQ) process for multiple antenna panels at a base station is challenging due to varying communication delays between panels, affecting the efficient transmission and reception of downlink data.
Innovation Solution
The solution involves including the HARQ process number corresponding to each antenna panel in the downlink schedule information sent to the terminal, allowing the terminal to accurately distinguish between first-time and re-transmitted data, and enabling joint reception and decoding of data from multiple antenna panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ process numbers are included in downlink schedule information for multiple antenna panels, then data transmission reliability is improved, but downlink control information overhead increases
Solution Approach 1:
The patent segments the HARQ process information by associating it with specific antenna panel identifiers. Each antenna panel's downlink data is tagged with both the panel identifier and HARQ process number, allowing the terminal to separately track HARQ processes for each panel. This segmentation enables reliable multi-panel HARQ management while keeping control information organized and manageable.
Solution Approach 2:
The downlink schedule information is designed to serve multiple functions simultaneously: it schedules downlink data transmission, identifies the antenna panel used, and carries HARQ process numbers. This multi-functional design allows the system to manage multiple antenna panels with unified scheduling while maintaining reliable HARQ tracking without proportionally increasing overhead.
2Productivity
If multiple antenna panels are used for downlink transmission, then throughput capacity is improved, but HARQ process management complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the HARQ management space into separate tracks for each antenna panel. The terminal maintains distinct HARQ process states for each panel identified by panel IDs, allowing independent management of HARQ processes per panel. This segmentation reduces management complexity compared to a unified approach by providing clear separation of concerns.
Solution Approach 2:
The patent introduces antenna panel identifiers as an intermediary element between the physical antenna panels and the HARQ process management system. These identifiers act as mediators that link specific antenna panels to their corresponding HARQ processes, simplifying the terminal's management task by providing a clear mapping relationship without requiring complex cross-panel coordination.
3Measurement precision
If HARQ process numbers are added to downlink schedule information, then first-time and re-transmitted data can be distinguished, but signaling message size increases
Solution Approach 1:
The patent applies local quality by adding HARQ process numbers selectively to downlink schedule information based on the transmission context. The HARQ process number is included in the control information where it is needed for accurate data identification, while the overall signaling structure maintains efficiency through localized enhancement rather than universal expansion of all control messages.
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
A downlink data sending method, a receiving method, a device, and a storage medium. The method comprises: a base station sending downlink scheduling information to a terminal, the downlink scheduling information notifying the terminal of configuration information used by n panel antennas of the base station for sending downlink data, the downlink scheduling information comprising respective HARQ process numbers corresponding to the n panel antennas for sending the downlink data, and n being an integer greater than 1; the base station sending the downlink data to the terminal via the n panel antennas; and the terminal receiving the downlink data according to the downlink scheduling information. The present disclosure provides a HARQ process solution for multiple panel antennas, such that HARQ process numbers respectively corresponding to downlink data sent by the multiple panel antennas enable the terminal to differentiate the data and thus accurately find initially sent data corresponding to a specific piece of re-transmitted data, thereby achieving merged reception and decoding of the initially sent data and the re-transmitted data, and improving the throughput.