Sidelink SCI Scheduling With Slot Gaps for Lower Terminal Power
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Solution Overview
Problem
The high power consumption of terminal devices in sidelink communication, particularly due to frequent detection and decoding of first-order and second-order SCI, is a significant challenge that needs to be addressed.
Innovation Solution
Implementing a communication method where the interval between receiving a physical sidelink control channel (PSCCH) and the scheduled physical sidelink shared channel (PSSCH) is greater than or equal to X slots, with X being a positive integer, to reduce the frequency of SCI detection and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the interval between PSCCH and PSSCH is reduced to improve communication efficiency, then productivity increases, but power consumption increases due to frequent SCI detection and decoding
Solution Approach 1:
The patent applies periodic action by establishing a specific interval pattern between PSCCH and PSSCH transmissions. The terminal device performs SCI detection and decoding at periodic intervals defined by the slot gap parameter, rather than continuously. This periodic operation allows the device to enter low-power states between detection cycles, reducing overall power consumption while maintaining communication functionality.
Solution Approach 2:
The patent implements preliminary action by having the terminal device detect first-order SCI in advance during the interval between PSCCH and PSSCH. Based on this preliminary detection, the device can determine whether second-order SCI needs to be decoded, allowing it to prepare and potentially skip unnecessary decoding operations, thereby reducing power consumption before the actual data transmission occurs.
2Reliability
If SCI detection and decoding frequency is increased to improve communication reliability, then reliability improves, but power consumption increases
Solution Approach 1:
The patent applies partial action by implementing a two-stage SCI detection mechanism. The terminal device performs partial detection of first-order SCI at all intervals, but only performs the more power-intensive second-order SCI decoding when necessary (excessive action). This selective approach ensures communication reliability by detecting all control information while avoiding unnecessary full decoding operations that would consume excessive power.
Solution Approach 2:
The patent segments the SCI detection process into two distinct stages: first-order SCI detection and second-order SCI decoding. This segmentation allows the terminal device to perform the lighter first-order detection frequently to maintain reliability, while performing the heavier second-order decoding only when required by the first-order SCI content, thereby balancing reliability requirements with power consumption constraints.
Data Source
AI summary
A communication method includes: receiving, by a first terminal device, a first PSCCH in a first slot, where the first PSCCH is used to schedule a first PSSCH; and receiving, by the first terminal device, the first PSSCH in a second slot according to the first PSCCH, where an interval between the first slot and the second slot is greater than or equal to X slots, X being a positive integer, X is determined according to any one of a standard definition, a network configuration, a pre-configuration, or a determination by the first terminal device.