Mobile Device Power Management via Server Paging
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Solution Overview
Problem
Mobile communications devices face inefficiencies in power management when connected to wireless LANs, as traditional CDMA paging channels cannot be implemented, leading to prolonged active modes and reduced battery life, especially since wireless LAN access is asynchronous and lacks synchronizing information.
Innovation Solution
A mobile communications device with a processor configured to operate in both active and sleep modes, using a transceiver to transmit messages to a server upon transitioning from sleep mode to active mode, allowing users to set a selectable sleep mode interval and manage power usage independently of wireless LAN power saving functionalities, thereby conserving power and extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If mobile devices use traditional CDMA paging channels for power management, then power consumption is reduced and battery life is extended, but this approach cannot be implemented in wireless LAN environments due to asynchronous access and lack of synchronizing information
Solution Approach 1:
The patent introduces a server as an intermediary between the mobile device and the wireless LAN. The server receives paging information from the cellular network and forwards it to the mobile device through the wireless LAN, enabling power-saving paging functionality in an asynchronous wireless LAN environment without requiring native WLAN power management features
Solution Approach 2:
The mobile device is designed to operate in both cellular networks and wireless LANs, using the cellular network for power management via the server while utilizing the wireless LAN for data communication. This multi-functional approach allows the device to leverage the power-saving capabilities of cellular networks while accessing the flexibility of wireless LANs
2Reliability
If mobile devices remain in active mode continuously to ensure timely notification of incoming calls, then call response time is improved, but power consumption increases and battery life decreases
Solution Approach 1:
Instead of continuous active monitoring, the mobile device uses periodic wake-ups triggered by the cellular network's paging channel. The device remains in low-power sleep mode and only activates its receiver periodically to check for incoming calls, significantly reducing power consumption while maintaining reliable call notification through the server-based paging mechanism
3Adaptability or versatility
If mobile devices use wireless LANs without native power saving functionalities, then network flexibility and access are improved, but power management efficiency deteriorates
Solution Approach 1:
The server acts as a mediator that bridges the cellular network's power-efficient paging mechanism with the wireless LAN's asynchronous communication. The server receives paging messages from the cellular network and transmits them through the wireless LAN to the mobile device, enabling power-saving operation in wireless LAN environments that lack native power management features
Data Source
AI summary
The disclosure is directed to a mobile communication device, and method for controlling power saving features at the mobile device. A processor in the mobile device may be used to establish a network connection with a server in a first network. The mobile device may also include a transceiver that initiates transmission of a message to the server to determine if an incoming call request has been received via a second network. Advantageously, the transceiver is in a low power mode of operation for a selectable time interval when not communicating with the server.