5G Cross-Carrier Data Scheduling Buffer Management
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Solution Overview
Problem
In 5G wireless communication systems, cross-carrier scheduling faces challenges due to varying subcarrier spacings across different frequency bands, leading to increased processing load in terminal devices as data needs to be buffered for longer durations, exceeding buffer sizes and straining device resources.
Innovation Solution
A data scheduling method that limits the time domain position of scheduled data based on the terminal device's capability, such as buffer size and processing capability, to reduce buffering duration and processing load, by determining the second time domain position relative to the first time domain position and the terminal device's capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-carrier scheduling is implemented in 5G system with varying subcarrier spacings, then scheduling flexibility and spectrum utilization are improved, but terminal device processing load increases and buffer size requirements increase
Solution Approach 1:
The patent applies dynamics by making the time domain position of scheduled data adjustable rather than fixed. The network device dynamically determines the second time domain position based on the first time domain position and terminal device capability, allowing flexible adaptation to different subcarrier spacing configurations while managing terminal processing load
Solution Approach 2:
The patent changes the parameter of time domain position to resolve the contradiction. By varying the second time domain position relative to the first time domain position based on terminal capability, the system adapts scheduling to different subcarrier spacing scenarios without overwhelming the terminal device
2Adaptability or versatility
If data is scheduled at later time domain positions to accommodate varying subcarrier spacings, then scheduling flexibility is improved, but data buffering duration increases exceeding terminal buffer size
Solution Approach 1:
The patent makes the buffering duration dynamic by determining the second time domain position based on terminal device capability. This ensures the buffering duration adapts to terminal limitations while maintaining scheduling flexibility for different subcarrier spacing configurations
Solution Approach 2:
The patent incorporates feedback by using terminal device capability information to determine the second time domain position. The network device adjusts the scheduling based on feedback about terminal buffering capacity, preventing excessive buffering duration
3Productivity
If cross-BWP scheduling is implemented with different subcarrier spacings, then spectrum utilization is improved, but terminal device buffer size requirements increase
Solution Approach 1:
The patent changes the time domain positioning parameter to manage buffer requirements. By determining the second time domain position based on the first time domain position and terminal capability, the system achieves efficient spectrum utilization across different BWPs while controlling buffer size requirements
Data Source
AI summary
This application relates to the field of communications technologies, and discloses a data scheduling method and an apparatus. The data scheduling method includes: sending, by a network device at a first time domain position, scheduling information to a terminal device, and sending or receiving, at a second time domain position, data scheduled by using the scheduling information, where the first time domain position and the second time domain position are located on different carriers, or the first time domain position and the second time domain position are located on different BWPs. The second time domain position may be determined based on an end position of the first time domain position and/or a capability of the terminal device.