5G Signal Reception Across BWPs and Beams With Lower UE Power
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Solution Overview
Problem
Existing 5G communication systems lack methods for efficiently transmitting and receiving signals at multiple frequency and spatial domain positions, leading to high power consumption and inefficiencies in UE operations.
Innovation Solution
A method for UE to determine and receive signals at specific frequency and spatial domain positions, and for network devices to transmit signals at corresponding positions, using BWP identifiers and beam identifiers, along with pre-indication signals like WUS, to reduce blind detection and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE monitors PDCCH at all frequency domain positions and spatial domain positions, then signal reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent segments the frequency domain into multiple bandwidth parts (BWPs) and the spatial domain into multiple beams. Instead of monitoring all positions simultaneously, the UE is configured to monitor only specific BWPs and beams based on pre-indication signals, dividing the monitoring task into manageable segments that reduce power consumption while maintaining reception reliability.
Solution Approach 2:
The patent introduces pre-indication signals (such as wake-up signals) that are transmitted before the actual PDCCH monitoring period. These pre-indication signals inform the UE whether it needs to wake up and monitor PDCCH in upcoming periods, allowing the UE to perform preliminary actions (or inactions) that prevent unnecessary monitoring and reduce power consumption while ensuring reliable signal reception when needed.
2Measurement precision
If UE performs blind detection at all frequency and spatial positions, then signal detection accuracy is improved, but operation duration is reduced
Solution Approach 1:
The patent applies local quality by configuring different monitoring parameters for different local regions (specific BWPs and beams). Instead of uniform blind detection across all positions, the UE performs targeted detection only in configured local regions, reducing the total detection burden and extending operation duration while maintaining accuracy in the relevant spatial and frequency regions.
Solution Approach 2:
The pre-indication signals enable the UE to perform preliminary determination of whether blind detection is necessary. By receiving wake-up signals or other pre-indications before the monitoring period, the UE can avoid unnecessary blind detection operations, thereby extending its operation duration while ensuring accurate signal detection when pre-indication signals indicate that monitoring is required.
3Adaptability or versatility
If network device transmits signals at all frequency domain positions and spatial domain positions, then signal coverage is improved, but transmission complexity increases
Solution Approach 1:
The patent segments the transmission system into multiple BWPs for frequency domain division and multiple beams for spatial domain division. The network device transmits signals at specific segmented positions rather than all positions simultaneously, reducing transmission complexity while maintaining comprehensive coverage through strategic selection of active BWPs and beams.
Solution Approach 2:
The network device transmits pre-indication signals before the actual signal transmission periods. These pre-indication signals carry information about which BWPs and beams will be active in upcoming periods, allowing the network to perform preliminary planning and configuration that reduces real-time transmission complexity while ensuring broad signal coverage.
Data Source
AI summary
A signal receiving method, a signal transmission method, UE, and a network device are provided. The signal receiving method includes: determining a frequency domain position and/or spatial domain position for receiving a signal, wherein the frequency domain position includes one or more of a plurality of frequency domain positions, and the spatial domain position includes one or more of a plurality of spatial domain positions; and receiving the signal at the determined frequency domain position and/or spatial domain position. The signal is one or more of a pre-indication signal, information carried in a PDCCH, and a paging message.