Low-Power Beam Management Using LP-SS Wake-Up Synchronization
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing increased communication traffic and power consumption, particularly in low-power scenarios, necessitating efficient beam management for low-power signal transmission and reception.
Innovation Solution
The introduction of a low-power wake-up receiver (LP-WUR) and associated signals, such as LP-SS and LP-WUS, with beam management methods for configuring multiple LP-SS occasions, operating CSI based on LP-SS, and transmitting beam information, to reduce power consumption while maintaining effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam management is implemented for low-power signal transmission, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies the copying principle by creating a simplified version of beam management specifically for low-power signals. Instead of implementing the full beam management procedure for all signals, the patent copies and adapts only the necessary beam management functions for low-power synchronization signals and wake-up signals, reducing overall system complexity while maintaining communication efficiency.
Solution Approach 2:
The patent segments beam management into different levels: full beam management for normal-power signals and a simplified version for low-power signals. This segmentation allows the system to apply appropriate complexity only where needed, improving communication efficiency for low-power operations without requiring the complete beam management apparatus to be active at all times.
2Use of energy by moving object
If low-power wake-up receiver mode is used, then power consumption is reduced, but synchronization capability is limited
Solution Approach 1:
The patent changes the parameters of synchronization signals by introducing low-power synchronization signals with reduced power levels specifically designed for LP-WUR operation. These signals have modified characteristics (lower power, simplified structure) that enable the low-power receiver to perform synchronization while consuming minimal energy, thus resolving the contradiction between power consumption and synchronization capability.
Solution Approach 2:
The patent introduces low-power synchronization signals as an intermediary between the base station and the low-power wake-up receiver. These intermediary signals serve as a bridge that enables synchronization capability in the low-power mode by providing reference signals that the LP-WUR can process with minimal power consumption, without requiring the full capabilities of a normal receiver.
3Area of stationary object
If multiple LP-SS occasions are configured, then beam coverage is improved, but signaling overhead increases
Solution Approach 1:
The patent applies universality by designing the low-power synchronization signal structure to serve multiple functions simultaneously. The same LP-SS occasion can cover multiple beams through clever resource allocation and signal design, allowing a single signaling framework to achieve wide coverage without requiring separate extensive signaling for each beam, thus reducing overhead while maintaining coverage.
Data Source
AI summary
Provided are a method and apparatus for beam management for low-power signal transmission and reception in a wireless communication system. A terminal operates in a low-power wake-up receiver (LP-WUR) mode and receives a low-power synchronization signal (LP-SS) from a base station in the LP-WUR mode. Subsequently, the terminal performs synchronization based on the received LP-SS, wherein the LP-SS has a quasi co-location (QCL) relationship with a synchronization signal block (SSB).