Paging Area Update Delay for Wireless Device Power Saving
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Solution Overview
Problem
The existing mobility management techniques for wireless communication devices in idle mode, particularly when transitioning between tracking areas, result in increased power consumption due to frequent paging area updates and poor communication quality at the borders of tracking areas, leading to a high number of repetitions and high transmission power requirements.
Innovation Solution
A method where the wireless communication device delays the transmission of paging area update requests based on configuration information, including a paging discard timer and overlap between current and neighboring paging areas, until sufficient communication quality is achieved, reducing the number of repetitions and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless communication device immediately transmits paging area update requests upon entering a new tracking area, then the network can quickly locate the device, but the device consumes more power due to frequent updates and high transmission power requirements at tracking area borders
Solution Approach 1:
The device performs preliminary measurements of downlink reference signal power before transmitting the paging area update request. By assessing the communication quality in advance and only transmitting when the power threshold is met, the device avoids unnecessary transmissions at tracking area borders, thereby reducing power consumption while ensuring reliable updates when communication conditions are sufficient.
2Reliability
If the device transmits paging area update requests with high power at tracking area borders, then the network receives reliable signals, but the device experiences ping pong effects between neighboring tracking areas
Solution Approach 1:
The device changes the transmission parameter (downlink reference signal power threshold) dynamically based on measurement conditions. By comparing the measured power against a threshold before transmitting, the device adapts its update behavior to the current communication environment, preventing unstable ping pong effects while maintaining reliable signal reception when conditions warrant an update.
3Use of energy by moving object
If the device delays paging area update transmission until sufficient communication quality is achieved, then power consumption is reduced, but the network may have outdated location information
Solution Approach 1:
The device implements a feedback mechanism by continuously measuring the downlink reference signal power and comparing it against a threshold. This feedback loop ensures that the device transmits paging area update requests only when communication quality is sufficient, reducing power consumption while maintaining accurate location information in the network by ensuring updates occur when reliable transmission is possible.
Data Source
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AI summary
According to various examples, a method for operating a wireless communication device (200) connectable to a cellular network (50) comprising a plurality of cells (300-340) is provided. The method comprises receiving (701), from the cellular network (50), configuration information for delaying a transmission of a paging area update request that triggers a paging area update of a paging area of a paging operation of the wireless communication device (200). Furthermore the method comprises, when operating in a disconnected mode associated with the paging operation, determining (703) that the paging area update is required, and upon determining (703) that the paging area update is required, delaying (708) the transmission of the paging area update request in accordance with the configuration information.