Minimum Slot Offset Selection for 5G Scheduling Tradeoffs
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Solution Overview
Problem
In 5G NR systems, there is a challenge in balancing power consumption and scheduling delay between same-slot and cross-slot scheduling, with same-slot scheduling causing unnecessary power consumption and cross-slot scheduling introducing significant delays, particularly in TDD systems.
Innovation Solution
A method and apparatus for determining a minimum slot offset value to intelligently switch between same-slot and cross-slot scheduling based on preset conditions, including application status, device parameters, and network environment, allowing the terminal device to report the minimum slot offset value to the network for optimal scheduling decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If same-slot scheduling is used, then scheduling delay is reduced, but power consumption increases
Solution Approach 1:
The patent implements dynamic scheduling mode selection where the terminal device can switch between same-slot scheduling and cross-slot scheduling based on real-time conditions. The network device receives assistance information about the terminal's minimum slot offset value and adjusts scheduling decisions dynamically, allowing the system to adapt to changing power and delay requirements rather than using a fixed scheduling mode.
Solution Approach 2:
The patent changes the scheduling parameter (slot offset value K0) based on terminal device state. By determining a minimum slot offset value and using it to select between different scheduling modes (same-slot when K0=0, cross-slot when K0>0), the system optimizes the balance between power consumption and scheduling delay according to specific operational conditions.
2Use of energy by moving object
If cross-slot scheduling is used, then power consumption is reduced, but scheduling delay increases
Solution Approach 1:
The system dynamically selects between cross-slot and same-slot scheduling based on terminal device conditions. When power saving is prioritized and conditions permit, cross-slot scheduling is used; when low delay is required, same-slot scheduling is selected. This dynamic adaptation resolves the contradiction by making scheduling mode a variable rather than a fixed choice.
Solution Approach 2:
The patent uses the minimum slot offset value parameter to control scheduling behavior. By adjusting this parameter based on terminal state (battery level, application requirements, network conditions), the system can shift between power-efficient cross-slot scheduling and low-latency same-slot scheduling, resolving the trade-off between these two opposing requirements.
Data Source
AI summary
A method and an apparatus for determining a minimum slot offset value is provided. The method is as follows: The terminal device determines whether a preset condition is met. The preset condition includes at least one of the following cases: a preset application is opened, a related parameter of the terminal device changes, data packet sparsity changes, or a network environment parameter changes. The terminal device determines a minimum slot offset value in response to the preset condition being met. If the minimum slot offset value determined by the terminal device is different from a minimum slot offset value indicated by a cell on which the terminal device currently camps, the terminal device sends auxiliary information, where the auxiliary information includes the minimum slot offset value determined by the terminal device, and the minimum slot offset value is used for cross-slot scheduling.