Terminal Power Saving via Dynamic DCI-PDSCH Time Offset
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Solution Overview
Problem
In existing communication technologies, terminals waste power by buffering data from the earliest possible start position of a time domain resource of a downlink data channel, even if the base station does not send the PDSCH, due to a short interval between the scheduled PDSCH and the DCI.
Innovation Solution
The terminal sends information to the network device indicating a first time domain offset and/or low power consumption, allowing the network device to configure a time domain resource allocation with a longer interval between the DCI and the start position of the time domain resource of the downlink data channel, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the terminal starts to buffer data from the earliest possible start position of the time domain resource of the PDSCH, then the terminal can receive data without delay, but the terminal causes power consumption waste by buffering data in vain when the base station does not send the PDSCH
Solution Approach 1:
The terminal performs preliminary actions by buffering data starting from the earliest possible start position of the time domain resource. However, this preliminary action causes energy waste when the PDSCH is not actually transmitted. The patent resolves this by introducing a mechanism to determine whether preliminary buffering is necessary before executing it.
Solution Approach 2:
The patent introduces feedback mechanisms where the terminal monitors DCI to determine whether PDSCH will be transmitted before starting to buffer data. This feedback loop allows the terminal to adjust its buffering behavior based on actual transmission intentions, avoiding unnecessary power consumption while maintaining timely data reception when needed.
2Productivity
If the interval between the earliest possible start position of the time domain resource of the PDSCH and the time domain position of the DCI is kept short, then the scheduling efficiency is improved, but the terminal cannot disable modules in time causing power consumption waste
Solution Approach 1:
The patent makes the time interval dynamic rather than fixed. The terminal can adjust the interval between DCI reception and PDSCH buffering based on whether data transmission is actually scheduled. When PDSCH is scheduled, the interval is short for efficient scheduling; when not scheduled, the interval is extended to allow module disabling and power savings.
3Loss of energy
If the terminal extends the interval between DCI and PDSCH start position to save power, then power consumption is reduced, but the scheduling efficiency and data reception speed decrease
Solution Approach 1:
The patent changes the time interval parameter dynamically based on transmission conditions. When PDSCH transmission is scheduled, the time interval parameter is set to a small value for fast data reception. When no transmission is scheduled, the parameter is increased to enable power savings through module disabling, thus optimizing both speed and energy consumption based on actual needs.
Data Source
AI summary
Embodiments of this application relate to a communications method and apparatus. An example of the method includes: sending, by a user equipment (UE) to a network device, information used to indicate a first time domain offset and/or information used to indicate low power consumption; and receiving, by the UE, first information sent by the network device, where the first information is used by the UE to determine a first time domain resource allocation.