Uplink Feedback Scheduling With Variable BL/CE Subframe Delays
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Solution Overview
Problem
The challenge of improving resource utilization in mobile communication systems with increased support for HARQ processes, such as from 10 to 14, is not adequately addressed by existing technologies.
Innovation Solution
A communication method that optimizes subframe scheduling by defining specific delay patterns for receiving and transmitting data and feedback, utilizing subframe types 1 and 2, and reducing signaling overhead through higher layer signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal supports more HARQ processes (e.g., 14 instead of 10), then the system capacity and data throughput are improved, but the resource utilization becomes inefficient due to increased scheduling delays and idle subframes
Solution Approach 1:
The patent introduces dynamic subframe type indication through downlink control information (DCI), allowing the system to flexibly switch between subframe type 1 and subframe type 2 configurations. This dynamic adaptation enables optimal resource utilization by selecting appropriate subframe types based on current traffic conditions and HARQ process requirements, thereby resolving the contradiction between supporting more HARQ processes and maintaining efficient resource utilization
Solution Approach 2:
The patent changes the scheduling delay parameter from a fixed value to a variable that can be dynamically adjusted through subframe type indication. By defining different subframe types with different delay characteristics (5-6 subframes for type 1, varying for type 2), the system can optimize the balance between supporting multiple HARQ processes and minimizing resource waste, directly addressing the resource utilization efficiency problem
2Speed
If the PDSCH scheduling delay is reduced to improve peak rate, then the data reception speed is improved, but the scheduling complexity and signaling overhead increase
Solution Approach 1:
The patent makes the downlink control information (DCI) multi-functional by embedding subframe type indication within the same signaling structure used for scheduling. This single DCI message simultaneously conveys both the scheduling assignment and the subframe type information, reducing overall signaling overhead while enabling flexible scheduling that improves peak data reception rates without proportionally increasing complexity
Solution Approach 2:
The patent performs preliminary classification of subframes into different types before data transmission occurs. By pre-defining subframe type 1 and subframe type 2 with their respective delay characteristics and indicating the type in advance through DCI, the system prepares the terminal for optimal reception timing, thereby improving peak rate while managing scheduling complexity through structured pre-planning
Data Source
AI summary
A communication method includes receiving downlink control information (DCI), wherein the DCI is useable to indicate a second delay of uplink feedback information of a physical downlink shared channel scheduled by a physical downlink control channel, determining the second delay based on the-DCI, and sending, on a last uplink bandwidth reduced low complexity-coverage enhancement (BL/CE) subframe of Z uplink BL/CE subframes based on the second delay, the uplink feedback information corresponding to the physical downlink shared channel. The second delay includes the following subframes in sequence Y-Z-1 downlink (BL/CE) subframes, one subframe, and the Z uplink BL/CE subframes. Y is an integer greater than or equal to 4 and less than or equal to 13, and Z is an integer equal to 1, 2, or 3.