Wake-Up Signal Configuration for Wireless User Equipment
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Solution Overview
Problem
In wireless communication systems, particularly in NB-IoT and eMTC, the current wake-up signal configuration leads to increased power consumption due to unnecessary monitoring of downlink control signaling, as user equipment wakes up even without a paging message, affecting detection performance and header overhead.
Innovation Solution
A method where user equipment receives and monitors a first sequence in target air interface resources, with the sequence repeatedly transmitted in time-domain resources, allowing for grouping of user equipment to reduce power consumption while supporting multiple time-frequency resources, thereby optimizing wake-up signal configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If user equipments share a same wake-up signal, then the detection performance is improved, but the power consumption of the user equipment rises sharply
Solution Approach 1:
The patent segments user equipments into different groups, with each group having its own dedicated wake-up signal. This segmentation allows UEs to detect whether their specific group has paging messages without all UEs waking up unnecessarily, thus reducing power consumption while maintaining detection performance for the targeted group.
Solution Approach 2:
Different wake-up signals are assigned to different terminal groups based on their specific needs and characteristics. Each group receives localized wake-up signal treatment rather than a universal approach, allowing optimized power consumption for each group while maintaining overall system detection performance.
2Use of energy by moving object
If user equipments are grouped to reduce power consumption, then the power consumption is reduced, but the detection performance and header overhead of the wake-up signal are affected
Solution Approach 1:
The patent dynamically adjusts wake-up signal configurations based on terminal group characteristics and paging message distributions. The grouping and signal assignment can be adapted to different scenarios, maintaining detection performance while optimizing power consumption for each specific situation.
Solution Approach 2:
The patent changes parameters such as the number of wake-up signals, group sizes, and signal resource allocations to balance power consumption and detection performance. By adjusting these parameters based on system conditions, it achieves optimal trade-off between reducing power consumption and maintaining detection capability.
3Adaptability or versatility
If more time-frequency resources are allocated to wake-up signal, then the support for multiple sequences is improved, but the header overhead increases
Solution Approach 1:
The patent designs wake-up signals with multi-functional capabilities, where a single wake-up signal structure can serve multiple terminal groups and support various paging scenarios. This universality reduces the need for separate dedicated resources for each sequence, thereby reducing header overhead while maintaining support for multiple sequences.
Data Source
AI summary
The present disclosure discloses a method and device in user equipment and a base station for wireless communication. The user equipment receives first information first, then monitors a first sequence in target air interface resources, and then receives a first radio signal if the first sequence is detected; wherein the target air interface resources are one of M candidate air interface resources, the first sequence is repeatedly transmitted Q times in the time-domain resources included in the target air interface resources, the M is related to the Q, the first information is used to determine the time-domain resources included in the target air interface resources, and the M and the Q are positive integers, respectively. The method in the present disclosure can reduce the signaling header overhead and simplify the implementation.