Relay UE Sidelink Signal Detection Power Reduction
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Solution Overview
Problem
In wireless communication systems, the periodic transmission of Sidelink Synchronization Signals and PSDCH increases power consumption in User Equipment (UE), reducing standby time, and the traditional Relay UE selection process is complex, requiring Remote UE to receive signals from both the Relay UE and the base station.
Innovation Solution
A method where the UE dynamically detects and transmits wireless signals within specific time windows, using characteristic sequences and reference signals to determine channel quality and relay suitability, reducing power consumption and complexity by having the UE serve as a relay node and measure channel quality without needing to monitor the Sidelink.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE periodically transmits Sidelink Synchronization Signals and PSDCH, then the relay function can be implemented, but the power consumption of the UE increases and standby time decreases
Solution Approach 1:
The patent applies periodic action by configuring the UE to transmit Sidelink Synchronization Signals and PSDCH only in specific periodic time windows rather than continuously. The network device configures time window parameters including periodicity, offset, and duration, allowing the UE to enter sleep mode between windows, thus reducing power consumption while maintaining relay functionality.
2Ease of operation
If the Remote UE selects the Relay UE by receiving signals from both the Relay UE and the base station, then the relay selection can be performed, but the complexity of the Remote UE receiver increases
Solution Approach 1:
The patent introduces the network device as an intermediary that assists in the relay selection process. The network device configures time windows for signal transmission and provides assistance information to the Remote UE, simplifying the receiver's task of identifying and selecting the Relay UE without requiring complex simultaneous processing of multiple signals.
3Measurement precision
If the UE monitors the Sidelink to determine channel quality, then the relay suitability can be assessed, but the power consumption and processing complexity increase
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure time windows and transmission parameters before the UE needs to assess channel quality. The UE only needs to monitor during these pre-configured windows rather than continuously, reducing power consumption while still obtaining necessary channel quality measurements for relay suitability assessment.
Data Source
AI summary
A method and apparatus in a user equipment and a base station for narrowband communication based on a cellular network are provided. The user equipment receives first information, and then detects the first wireless signal including at least one of {a first characteristic sequence, a first reference signal, and a second information} in a first time window. The transmitter of the first wireless signal is a second node, and the transmitter of the first information and the second node are non-co-located. The first information determines at least one of {the first time window, a parameter of the first characteristic sequence, a parameter of the first reference signal}. The embodiments save power consumption of the relayed user equipment and ensure that the channel quality of the sidelink is better than the channel quality of the uplink. In addition, the embodiments utilize the first flag bit to reduce the air interface overhead.