Single-Path Receiver Time-Division Paging for Dual-Network
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Solution Overview
Problem
Dual-SIM-Dual-Standby (DSDS) mobile communications receivers face challenges in efficiently receiving pagings from multiple networks without additional hardware, leading to increased power consumption and potential missed notifications due to overlapping paging indicators from different networks.
Innovation Solution
Implementing a method where the receiver alternately listens to paging indicator channels from multiple networks during consecutive time periods, utilizing a control unit to manage the demodulation of down-converted signals from different frequency bands or shared frequency bands, ensuring detection of pagings even when indicators overlap, and employing memory to delay and process signals from one network during the processing time of another.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a second receive path is added to the UE to receive pagings from both networks, then the ability to receive pagings from multiple networks is improved, but the hardware complexity and power consumption increase
Solution Approach 1:
The patent merges the paging reception functionality for multiple networks into a single receive path. The UE alternates between listening to paging indicator channels from different networks during consecutive time periods, allowing one receiver to handle multiple networks by time-division multiplexing, thus avoiding the need for additional hardware receive paths
Solution Approach 2:
The patent introduces dynamic switching of the receive path between different networks based on time periods. The single receiver dynamically alternates its listening focus between Network 1 and Network 2, adapting its operation to serve multiple networks sequentially rather than requiring simultaneous dedicated paths for each network
2Reliability
If a second receive path is added to the UE to receive pagings from both networks, then the ability to receive pagings from multiple networks is improved, but the power consumption increases
Solution Approach 1:
The patent combines multiple paging reception tasks into a single active receive path that operates intermittently. By merging the functionality of what would require two continuously active receivers into one receiver that alternates between networks, the overall power consumption is reduced while maintaining the ability to detect pagings from both networks
Solution Approach 2:
The patent implements periodic switching between listening to different networks' paging indicator channels. The single receive path operates in periodic intervals, alternating between Network 1 and Network 2, which reduces average power consumption compared to having two continuously active receive paths, while still ensuring periodic detection of paging indicators from both networks
3Device complexity
If the UE listens to pagings from multiple networks using a single receive path, then the hardware complexity is reduced, but the probability of missing pagings increases due to overlapping paging indicators
Solution Approach 1:
The patent employs dynamic time-division switching to allocate the single receive path to different networks in alternating time periods. This dynamic approach ensures that when the UE is listening to Network 1's paging indicator channel, it does so without interference from Network 2, and vice versa, thereby maintaining high detection accuracy while using minimal hardware
Solution Approach 2:
The patent segments the paging reception process into distinct time periods, with each period dedicated to listening to a specific network's paging indicator channel. This temporal segmentation prevents overlapping paging indicators from causing detection errors, as the receiver focuses on one network at a time, thereby maintaining reliability with a single receive path
Data Source
AI summary
A mobile communications radio receiver for multiple radio network operation includes an RF unit configured to generate a first down-converted signal from a radio signal received from a first radio network and a second down-converted signal from a radio signal received from a second radio network. Further, the mobile communications radio receiver includes a paging indicator channel demodulator configured to demodulate during a first period of time a paging indicator channel of the first radio network based on the first down-converted signal and for demodulating during a second period of time a paging indicator channel of the second radio network based on the second down-converted signal.