PDSCH Receiving Information Indication via PDCCH Signaling
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Solution Overview
Problem
Current methods for indicating Physical Downlink Shared Channel (PDSCH) receiving information in wireless communications, especially in high-frequency bands, suffer from low efficiency and delayed notification, leading to degraded PDSCH receiving performance due to large propagation losses and the reliance on Radio Resource Control (RRC) signaling.
Innovation Solution
A method where a network device generates and transmits first indication information over the Physical Downlink Control Channel (PDCCH) to dynamically indicate PDSCH receiving information, using information identical to PDCCH receiving information, thereby improving PDSCH receiving performance and efficiency compared to traditional RRC signaling methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RRC signaling is used to notify the terminal of new PDSCH receiving information, then the terminal can obtain updated receiving information, but the notification delay increases and notification efficiency decreases
Solution Approach 1:
The patent segments the notification mechanism into two parts: critical PDSCH receiving information is transmitted via PDCCH for immediate delivery, while less time-sensitive information can use RRC signaling. This segmentation allows time-critical updates to bypass the slow RRC layer and reach the terminal quickly through the physical downlink control channel, thereby reducing notification delay while maintaining reliability.
Solution Approach 2:
The patent introduces PDCCH as an intermediary channel between the network device and terminal for transmitting PDSCH receiving information. Instead of relying solely on the traditional RRC signaling path, the PDCCH acts as a faster mediator that can deliver receiving information updates more promptly, thus reducing the time loss without compromising the accuracy of the information delivery.
2Reliability
If RRC signaling is used to indicate PDSCH receiving information, then the terminal can be notified of new receiving parameters, but the signaling overhead increases and notification efficiency decreases
Solution Approach 1:
The patent extracts the most critical PDSCH receiving information from the RRC signaling stream and transmits it separately through PDCCH. By taking out only the essential receiving parameters that require immediate updates and sending them through the more efficient PDCCH channel, the patent reduces the overall signaling overhead while ensuring that the most important information is delivered reliably and quickly.
Solution Approach 2:
The patent segments PDSCH receiving information into different categories based on urgency and importance. Critical parameters are transmitted via PDCCH with minimal overhead, while less time-sensitive information remains in RRC signaling. This segmentation reduces the total signaling overhead by avoiding the transmission of all receiving information through the slower, more overhead-prone RRC path.
3Adaptability or versatility
If the terminal scans receiving beams in a beam scanning manner, then the terminal can obtain receiving beams, but the scanning time increases and power consumption increases
Solution Approach 1:
The patent applies preliminary action by having the network device pre-determine and indicate the optimal PDSCH receiving beam to the terminal before actual data transmission. Instead of letting the terminal perform time-consuming beam scanning, the network device performs the beam selection in advance and communicates the result to the terminal through PDCCH, thereby eliminating the need for terminal-side beam scanning and significantly reducing scanning time and power consumption.
Solution Approach 2:
The patent enables the network device to perform the beam scanning and selection service on behalf of the terminal. Rather than requiring the terminal to autonomously scan and identify receiving beams (which consumes terminal power and time), the network device performs this service centrally and provides the results to the terminal, allowing the terminal to directly use the indicated beam without performing its own scanning operations.
Data Source
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AI summary
This application discloses a method for indicating PDSCH receiving information, a data receiving method, and an apparatus. According to this application, a network device generates first indication information, where the first indication information is used to indicate physical downlink shared channel PDSCH receiving information, and the PDSCH receiving information includes information identical to physical downlink control channel PDCCH receiving information; and the network device transmits the first indication information over a PDCCH. This application can be used to improve efficiency of indicating PDSCH receiving information, thereby improving PDSCH receiving performance.