Wake-Up Signal Reception in Wireless Communication Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing wake-up signals in device-to-device (D2D) and vehicle-to-everything (V2X) communication, particularly in minimizing power consumption and optimizing resource allocation for effective data transmission.
Innovation Solution
A method and apparatus for receiving a wake-up signal in a wireless communication system, where a first user equipment (UE) operates a wake-up receiver during designated ON duration and receives data after detecting a wake-up signal from a second UE, with information about the wake-up signal ON duration signaled to both UEs, allowing for efficient power management and resource optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wake-up signal is transmitted continuously to ensure data transmission reliability, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic wake-up signal transmission by defining a wake-up signal ON duration within a DRX cycle. The transmitting UE sends wake-up signals only during designated time intervals rather than continuously, allowing the receiving UE to sleep during OFF durations. This periodic transmission pattern maintains reliable data transmission while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The patent applies preliminary action by having the network or transmitting UE configure and signal the wake-up signal ON duration parameters in advance. The receiving UE uses these pre-configured parameters to know when to activate its receiver and when to enter sleep mode, enabling efficient power management before actual data transmission occurs.
2Reliability
If wake-up signal ON duration is extended to improve data reception reliability, then data reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of the wake-up signal ON duration based on actual communication needs. The network can modify the ON duration parameters dynamically to balance between reliable data reception and power consumption, allowing the system to adapt to varying traffic conditions and reliability requirements without fixed constraints.
3Productivity
If wake-up signal transmission resources are allocated more frequently to ensure timely data transmission, then data transmission efficiency is improved, but network overhead increases
Solution Approach 1:
The patent applies parameter changes by adjusting the wake-up signal transmission period and ON duration as configurable parameters. The network can optimize these parameters to achieve timely data transmission with minimal overhead, adapting the frequency and timing of wake-up signals based on traffic patterns and quality of service requirements.
Data Source
AI summary
One embodiment of the present invention provides a method for receiving a wake-up signal by a first UE in a wireless communication system, the method comprising the steps of: operating a wake-up receiver during a wake-up signal on-duration by the first UE; and receiving a wake-up signal transmitted by a second UE through the wake-up receiver and then receiving data, wherein information related to the wake-up signal on-duration is commonly signaled to the first UE, which receives the wake-up signal, and the second UE which transmits the wake-up signal. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, the BS or a network.