Broadcast Manager Synchronizing eDRX Paging Windows
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Solution Overview
Problem
In wireless communication systems, efficiently broadcasting or multicasting data to user equipment (UE) operating in extended discontinuous reception (eDRX) mode is challenging due to varying and potentially long sleep intervals, leading to inefficient data transmission and increased system resource usage, especially when UE do not share overlapping paging windows.
Innovation Solution
A method where a broadcast manager identifies a time interval encompassing the paging windows of multiple UE and generates messages indicating a transmission time for broadcast or multicast data, allowing UE to wake up and receive data at a synchronized time subsequent to their individual sleep intervals, thereby optimizing data delivery and reducing system resource requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If user equipment use extended idle mode discontinuous reception with varying sleep intervals to save power, then power consumption is reduced, but data transmission efficiency deteriorates
Solution Approach 1:
The network side sends a notification message to the user equipment during its paging window, informing it of an upcoming broadcast or multicast transmission time. This preliminary notification allows the user equipment to wake up in advance of the actual data transmission, ensuring it is ready to receive data while maintaining its eDRX power-saving mode. The notification includes the transmission time which is subsequent to the time interval encompassing paging windows, giving UE advance notice to prepare for data reception.
2Adaptability or versatility
If user equipment have different eDRX cycle durations and paging window timings, then power management flexibility is improved, but system complexity increases
Solution Approach 1:
The notification mechanism is designed to work universally with user equipment having different eDRX cycle durations and paging window configurations. The network side identifies a time interval that encompasses the paging windows for multiple user equipment with varying configurations, and sends notifications during these windows. This universal approach allows the system to handle diverse eDRX configurations without requiring complex individualized scheduling for each device.
Solution Approach 2:
The notification message acts as an intermediary between the network's data transmission schedule and the user equipment's eDRX cycles. Rather than directly synchronizing transmissions with each device's specific cycle, the system uses the notification message to bridge the gap, informing devices of upcoming transmissions in a way that accommodates their individual sleep patterns while maintaining system-wide coordination.
3Speed
If broadcast or multicast data is transmitted immediately, then data delivery speed is improved, but user equipment power savings are reduced
Solution Approach 1:
The system performs preliminary notification by sending messages to user equipment during their paging windows, informing them of upcoming broadcast or multicast transmission times. This allows user equipment to maintain their eDRX sleep patterns and only wake up when necessary to receive data, rather than requiring continuous monitoring or immediate wake-up, thus preserving power savings while ensuring timely data reception.
Data Source
AI summary
A broadcast manager identifies a time interval that encompasses paging windows for a plurality of user equipment. The plurality of user equipment operate according to a plurality of discontinuous reception cycles that include sleep intervals separated by the paging windows. The broadcast manager generates messages for wireless transmission to the plurality of user equipment in corresponding paging windows during the time interval. The messages include information indicating a transmission time at which the plurality of user equipment are to receive broadcast or multicast data. The transmission time is subsequent to the time interval.