Multi-UE Wake-Up Signal Subsequence Design
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Solution Overview
Problem
In LTE and 5G communication systems, user equipment (UE) in an RRC idle state experiences high power consumption while blindly detecting paging signals, and existing wake-up and go-to-sleep signal designs have low resource utilization as they typically indicate a single UE state.
Innovation Solution
A method where a base station transmits a subsequence from a predetermined set that includes multiple subsequences, each indicating a wake-up or sleep state for multiple terminals, allowing simultaneous indication of different states for multiple UEs, improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sequence is used to indicate one UE state in wake-up or go-to-sleep signal design, then the signal detection is simple, but the resource utilization is low
Solution Approach 1:
The patent divides the sequence into multiple subsequences, where each subsequence can independently indicate the state of a specific UE. This segmentation allows one wake-up or go-to-sleep signal to carry multiple state indications, thereby improving resource utilization while maintaining simple detection mechanisms for each subsequence
Solution Approach 2:
The patent introduces a new dimension by mapping subsequences to multiple UEs simultaneously. Instead of one sequence per UE, the system uses a set of subsequences that can be combined to indicate states of multiple UEs, effectively adding multiplexing capability without increasing the complexity of individual signal detection
2Reliability
If UE blindly detects Paging signal or PDCCH in RRC idle state, then the terminal can receive paging information, but the power consumption is high
Solution Approach 1:
The base station transmits wake-up signals or go-to-sleep signals before the UE needs to blindly detect Paging or PDCCH. The UE detects these preliminary signals first, which indicate whether the UE should wake up to receive paging information or continue sleeping, thereby avoiding unnecessary high-power blind detection operations
Solution Approach 2:
The wake-up signal or go-to-sleep signal acts as an intermediary between the base station and the UE. Instead of the UE directly blind-detecting the Paging signal (which consumes high power), the intermediary wake-up/go-to-sleep signal first guides the UE's behavior, reducing power consumption while maintaining reliable paging information delivery
Data Source
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AI summary
A terminal state indicating method, a terminal state determining method, a base station and a terminal are provided. The terminal state indicating method includes: transmitting a subsequence in a predetermined subsequence set, the predetermined subsequence set includes at least one subsequence, each of the at least one subsequence is configured to indicate that at least two terminals are in a target state, and the target state includes a wake-up state or a sleep state.