Wakeup Signal Group Encoding for Efficient UE Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies in transmitting wakeup signals to UEs, particularly when identifying the appropriate UEs for awakening, and adding additional information to the signal to indicate applicability can be cumbersome.
Innovation Solution
UEs are assigned to groups, and a single wakeup signal is used to awaken all UEs in a group, with the signal encoded to include a UE group identifier and cell identifier using Zadoff-Chu sequences and cover codes, allowing efficient identification without requiring prior decoding of other signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single wakeup signal is used to awaken all UEs in a group, then power consumption is reduced and transmission efficiency is improved, but UE identification difficulty increases
Solution Approach 1:
The patent segments UEs into different groups and assigns unique identifiers to each group. The wakeup signal contains group identification information that allows UEs to determine whether the signal is intended for them. This segmentation approach enables efficient group-based wakeup signaling while maintaining clear UE identification through the group ID mechanism.
Solution Approach 2:
The patent introduces an intermediary identification mechanism where the wakeup signal contains group identification information rather than directly addressing individual UEs. This intermediary approach allows UEs to efficiently filter relevant signals without requiring complex individual identification, thus reducing power consumption while maintaining identification capability.
2Measurement precision
If additional information is added to the wakeup signal to indicate applicable UEs, then UE identification accuracy is improved, but signal complexity increases
Solution Approach 1:
The patent applies local quality by embedding identification information specifically within the preamble portion of the wakeup signal rather than distributing it throughout the entire signal structure. This localized approach improves UE identification accuracy while minimizing overall signal complexity, as UEs can quickly check the preamble for group ID matches without processing the entire signal.
Solution Approach 2:
The patent utilizes parameter changes by encoding group identification information through modifications to existing signal parameters such as cyclic shifts and cover codes of Zadoff-Chu sequences. This approach improves identification accuracy by providing distinct parameter patterns for different groups while avoiding the need to introduce entirely new signal structures, thus controlling complexity.
3Productivity
If UEs are assigned to groups for wakeup signaling, then transmission efficiency is improved, but signal detection difficulty increases
Solution Approach 1:
The patent makes the wakeup signal universal by designing it to serve multiple functions: it can wake up individual UEs, groups of UEs, or all UEs depending on the configuration. The signal structure incorporates universal elements such as cell ID and system frame number that remain consistent across different wakeup scenarios, while allowing flexible group-specific identification. This multi-functionality improves transmission efficiency without significantly increasing detection difficulty.
Solution Approach 2:
The patent applies preliminary action by pre-configuring UEs with their group identifiers and the corresponding wakeup signal parameters before actual wakeup operations. This preliminary configuration enables UEs to efficiently detect and respond to wakeup signals without requiring complex real-time analysis, thus improving transmission efficiency while keeping detection relatively simple.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method, an apparatus, a base station, a user equipment (UE), and a computer program product for wireless communication are provided. The base station may encode a wakeup signal so that a preamble of the wakeup signal indicates whether the wakeup signal is relevant to the UE. The UE may select a technique for detecting the wakeup signal based at least in part on a partial, full, or no synchronization. In some aspects, the wakeup signal may be encoded with a system frame number. In some aspects, wakeup signals for guardband/standalone UEs are provided. Numerous other aspects are provided.