BWP Switching for Gap-Free PRS Reception in 5G Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In existing 5G systems, when the bandwidth of a positioning reference signal (PRS) exceeds the active BWP or has an inconsistent numerology, User Equipment (UE) needs to use a measurement gap, leading to interrupted data transmission.
Innovation Solution
A BWP switching method that ensures the UE switches to a first BWP where the numerology is consistent with or the bandwidth is greater than the PRS, allowing PRS reception without measurement gaps, using BWP activation signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE uses a measurement gap to measure the PRS when the PRS bandwidth exceeds the BWP bandwidth or numerology is inconsistent, then the PRS measurement can be performed, but data transmission is interrupted during the measurement gap
Solution Approach 1:
The patent dynamically switches the UE's active BWP to match the PRS bandwidth and numerology requirements. Instead of using a measurement gap that interrupts data transmission, the system dynamically reconfigures the BWP parameters (bandwidth and/or numerology) to be compatible with the PRS, allowing continuous data transmission while maintaining accurate PRS measurement capability
Solution Approach 2:
The patent changes the BWP parameters (bandwidth and/or numerology) to match the PRS characteristics. By adjusting these parameters, the UE can receive PRS within the active BWP without requiring measurement gaps, thus eliminating the interruption to data transmission while ensuring accurate PRS measurement
2Measurement precision
If the UE switches to a BWP with larger bandwidth to accommodate PRS, then PRS reception is enabled, but the UE power consumption increases
Solution Approach 1:
The patent dynamically switches the BWP configuration based on PRS requirements. The UE activates a BWP with larger bandwidth only when PRS reception is needed, and switches back to a smaller bandwidth BWP when PRS reception is not required. This dynamic switching enables PRS reception capability while minimizing power consumption by using the smaller bandwidth BWP during normal operation
Solution Approach 2:
The patent implements periodic switching between different BWP configurations based on PRS transmission patterns. The UE switches to the larger bandwidth BWP periodically when PRS is transmitted, and returns to the smaller bandwidth BWP in between PRS transmissions. This periodic action ensures PRS reception capability while reducing overall power consumption by limiting the time spent in high-power state
Data Source
AI summary
A bandwidth part (BWP) switching method, a terminal and a network side device are provided. The BWP switching method performed by the terminal includes: receiving a BWP activation signaling, switching to a first BWP according to the received BWP activation signaling; and receiving a positioning reference signal (PRS) on the first BWP, wherein the first BWP meets at least one of the following: a numerology of the first BWP is consistent with a numerology of the PRS; or a bandwidth of the first BWP is not less than a bandwidth of the PRS.