LP-WUS Transmission Indication for Low-Power Terminal Wake-Up
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Solution Overview
Problem
Existing communication technologies face inefficiencies in managing semi-persistent scheduling and uplink configured grants, leading to unnecessary delays and high power consumption due to reliance on PDCCH monitoring for activation and deactivation, particularly in low-power wake-up scenarios.
Innovation Solution
Implementing a low-power wake-up signal (LP-WUS) to carry transmission indication information, including semi-persistent transmission and small data transmission indications, allowing terminals to perform corresponding actions without waking up the main communication module, thereby reducing power consumption and delaying activation/deactivation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH monitoring is used for activation and deactivation of semi-persistent scheduling and uplink configured grants, then reliable control signaling is achieved, but power consumption increases and delays occur
Solution Approach 1:
The patent extracts the control signaling function from the main PDCCH monitoring path by introducing a separate low-power wake-up signal (LP-WUS) mechanism. The LP-WUS carries specific indicators (SPS indication field and CG indication field) that can independently activate or deactivate semi-persistent scheduling and uplink configured grants without requiring full PDCCH monitoring, thus separating the power-intensive PDCCH processing from the essential control indication reception.
Solution Approach 2:
The patent changes the operational parameters of the wake-up signal by defining specific bit fields (SPS indication field with first bit position, CG indication field with second bit position) within the LP-WUS structure. These parameter changes allow the network to precisely control different transmission types using the same low-power signal mechanism, enabling fine-grained power management while maintaining reliable control.
2Reliability
If PDCCH monitoring is used for activation and deactivation, then accurate control is achieved, but transmission delays increase
Solution Approach 1:
The patent implements preliminary action by having the terminal pre-configure multiple reception beams for the LP-WUS before actual data transmission begins. The network can then quickly switch between pre-configured beams using the indication fields in the LP-WUS without requiring time-consuming beam training or PDCCH monitoring setup, thereby reducing activation and deactivation delays while maintaining control accuracy.
3Reliability
If multiple reception beams are configured for wake-up signal, then signal reception reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the beam management function by assigning specific indication fields (SPS indication field at first bit position, CG indication field at second bit position) to control different transmission types independently. This segmentation allows the terminal to manage multiple reception beams in a structured manner, where each beam can be optimized for specific purposes (SPS vs. CG) without requiring complex unified beam management, thus improving reception reliability while controlling device complexity.
Data Source
AI summary
Provided are a data transmission method and apparatus, a wake-up signal monitoring method and apparatus, a terminal, and a device. The data transmission method includes following operations. A terminal monitors a first wake-up signal, where the first wake-up signal carries transmission indication information; and the terminal performs a corresponding transmission behavior according to the transmission indication information, where the transmission indication information includes at least one of the following: semi-persistent transmission indication information; and small data transmission indication information.