Wireless UE Paging Indicator Detection via CPICH Correlation
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Solution Overview
Problem
Wireless user equipment, such as cellular handsets, face challenges in reducing wake-up time from sleep mode to receive paging indicators efficiently, leading to increased power consumption and reduced standby time.
Innovation Solution
The implementation of a wireless user equipment system that receives and processes both common pilot channel (CPICH) and paging indicator channel (PICH) signals within the same time duration, using a processor module to select correlations and extract paging indicators based on CPICH signal correlations, allowing for reduced wake-up time and increased standby time by decoupling analog portions from power supply during sleep mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless user equipment wakes up periodically to receive paging indicators, then the equipment can detect incoming messages, but the wake-up time increases power consumption and reduces standby time
Solution Approach 1:
The patent applies preliminary action by performing correlation processing on the CPICH signal before receiving the PICH signal. The correlation results from the CPICH are used to guide the selection of correlations in the PICH, allowing the receiver to quickly identify relevant signal components and reduce the time needed for paging indicator detection. This preliminary processing enables faster wake-up and reduces power consumption while maintaining reliable message detection.
2Use of energy by moving object
If the wireless user equipment reduces wake-up time to save energy, then power consumption decreases, but the time available to receive and process paging indicators is reduced
Solution Approach 1:
The patent performs correlation analysis on the CPICH signal in advance during the wake-up period. These pre-computed correlation results are then reused to guide the selection of correlations in the PICH signal, eliminating the need to perform full correlation processing on both signals from scratch. This preliminary action significantly reduces the time required for paging indicator reception while maintaining power efficiency.
Solution Approach 2:
The patent discards redundant correlation computations by using CPICH correlation results to select only the necessary correlations from the PICH signal. Instead of processing all possible correlations in both signals, the system recovers and reuses the correlation information from the CPICH to guide PICH processing, thereby reducing total processing time and power consumption.
3Measurement precision
If the wireless user equipment processes both CPICH and PICH signals separately, then signal detection accuracy is maintained, but the processing time and complexity increase
Solution Approach 1:
The patent merges the processing of CPICH and PICH signals by using the correlation results from the CPICH signal to guide the selection of correlations in the PICH signal. This combining approach maintains signal detection accuracy by ensuring that relevant correlations are identified in both signals, while reducing processing complexity by eliminating redundant computations through the shared correlation information.
Data Source
AI summary
Aspects of the disclosure provide a wireless user equipment that can receive and demodulate a paging indicator with a reduced time duration. Therefore, the wireless user equipment may have a reduced wake-up time. The wireless user equipment can include a receiving module configured to receive signal components including a first signal transmitted over a common pilot channel (CPICH) and a second signal transmitted over a paging indicator channel (PICH) during a time duration. The second signal can include a paging indicator in the time duration. Further, the wireless user equipment can include a processor module configured to select a plurality of correlations in the second signal received during the time duration based on correlations in the first signal received during the time duration, and to extract the paging indicator from the plurality of correlations in the second signal. Additionally, the wireless user equipment can include a controller module configured to control the wireless user equipment according to the paging indicator.