Wake-Up Signal Grouping Using IMSI Segmentation
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Solution Overview
Problem
Existing wake-up signaling technologies in wireless communication systems face challenges in efficiently waking up specific groups of wireless devices while minimizing power consumption and false paging probabilities, particularly due to overlapping paging frames and carriers.
Innovation Solution
The solution involves determining Wake-Up Signal (WUS) groups based on unique portions of a wireless device's international mobile subscriber identifier (IMSI), ensuring that devices with the same paging frame or carrier can be distributed across different WUS groups, thereby reducing false paging and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices are grouped for wake-up signaling using existing methods, then devices can be awakened for paging messages, but false paging probability increases and power consumption is not minimized
Solution Approach 1:
The patent segments the wireless device population into distinct WUS groups based on different portions of the IMSI identifier. Each group is assigned to specific paging frames and carriers, creating a segmented structure that prevents overlap and reduces false paging probability while allowing targeted wake-up signaling to minimize power consumption.
Solution Approach 2:
The patent applies local quality by assigning different grouping functions to different portions of the IMSI identifier. Specifically, one portion of the IMSI is used for determining WUS group membership while another portion is used for determining paging frame assignment, creating localized differentiation that resolves the contradiction between reliable paging and power efficiency.
2Use of energy by moving object
If wake-up signal decoding time is reduced, then power consumption decreases, but device grouping complexity increases
Solution Approach 1:
The patent changes the parameter used for device grouping from simple sequential assignment to a hash-based assignment using IMSI portions. This parameter change enables efficient grouping that reduces false paging while maintaining manageable complexity through the use of standardized modular arithmetic operations on the IMSI identifier.
3Reliability
If devices with same paging frame are distributed across different WUS groups, then false paging is reduced, but grouping determination complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-determining WUS group membership based on IMSI portions before the actual paging process. This preliminary grouping determination, using hash functions on IMSI, eliminates the need for complex real-time decisions and simplifies the detection process while ensuring devices with the same paging frame are distributed across different WUS groups.
Data Source
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AI summary
A wireless device (14) is configured for use in a wireless communication system (10). The wireless device (14) is configured to determine a wake-up signal, WUS, group (11-1) to which the wireless device (14) belongs, based on a third function (f3) of a device identifier (14A) for the wireless device (14). The third function (f3) is different than a first function (f1) of the device identifier (14A) based on which a paging frame (3) of the wireless device (14) is determined and/or is different than a second function (f2) of the device identifier (14A) based on which a paging narrowband or carrier (9) of the wireless device (14) is determined. The wireless device (14) is also configured to monitor for a WUS (18) that indicates wireless devices in the determined WUS group (11-1) to which the wireless device (14) belongs are to wake up.