Scheduling Timing Determination for Inter-Carrier Scheduling
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Solution Overview
Problem
Current scheduling timing determination methods in communication systems lead to increased scheduling delay and limited flexibility due to the lag between control and data channels when subcarrier spacings differ, requiring larger storage capacity in terminals.
Innovation Solution
A method that determines the relative slot for data channel transmission on a scheduled carrier by considering the subcarrier spacings of both carriers, slot offset, and starting symbol of the control channel, using the starting time of the control channel transmission as a reference point, to ensure accurate timing alignment and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the control channel is transmitted on a scheduling carrier with smaller subcarrier spacing and the data channel on a scheduled carrier with larger subcarrier spacing using the conventional timing determination method, then the timing relationship is determined by slot index n, subcarrier spacings, and slot offset K0, but the control channel lags behind the data channel causing increased scheduling delay and requiring larger terminal storage capacity
Solution Approach 1:
The patent changes the timing determination parameters from slot-based indexing to symbol-based timing alignment. By using the starting symbol position of the control channel within its slot and calculating the data channel timing based on this symbol-level reference point, the system achieves more precise timing control that eliminates the lag between control and data channels while reducing the storage capacity requirements at the terminal.
2Adaptability or versatility
If the control channel lags behind the data channel in inter-carrier scheduling with different subcarrier spacings, then the timing relationship can be determined using conventional formulas, but scheduling flexibility is limited
Solution Approach 1:
The patent applies preliminary action by determining the starting symbol position of the control channel within its slot before calculating the data channel transmission timing. This advance determination of the reference time point allows the system to flexibly adjust data channel timing without waiting for slot boundaries, thereby improving scheduling flexibility while reducing delays through proactive timing alignment.
Data Source
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AI summary
A scheduling timing determination method, a terminal and a network side device are provided. A method applied to a terminal includes: receiving scheduling information of a network side device carried by a control channel on a scheduling carrier, and obtaining a slot offset between the control channel and a data channel according to the scheduling information; determining a relative slot where the data channel is transmitted on the scheduled carrier according to a subcarrier spacing of the scheduling carrier, a subcarrier spacing of the scheduled carrier, the slot offset between the control channel and the data channel, and a starting symbol of the control channel transmitted in a slot on the scheduling carrier, where the relative slot uses a starting time of the slot where the control channel is transmitted on the scheduling carrier as a reference point; determining a transmission slot of the data channel on the scheduled carrier according to the relative slot.