WLAN Activation Management for Mobile Device Power Reduction
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Solution Overview
Problem
In mobile communication systems, offloading cellular traffic to Wi-Fi networks increases power consumption and results in unnecessary network loads due to undesired attach/detach procedures and signaling overhead.
Innovation Solution
An electronic device and gateway device that manage WLAN activation status with a packet data network to maintain channel authentication and reduce power consumption by avoiding unnecessary attach/detach procedures, using methods to determine and communicate WLAN activation/deactivation status to optimize network selection and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cellular traffic is offloaded to Wi-Fi networks, then network capacity is improved, but power consumption increases
Solution Approach 1:
The electronic device proactively notifies the PGW of its WLAN activation status before actual data transmission occurs. By performing this preliminary notification action, the system avoids unnecessary attach/detach procedures when the device switches between cellular and Wi-Fi networks, thereby reducing power consumption while maintaining network capacity
Solution Approach 2:
The system establishes a feedback mechanism where the electronic device continuously informs the PGW about its WLAN status. This feedback loop allows the network to adapt its behavior accordingly, avoiding redundant signaling procedures and reducing the power consumption associated with frequent attach/detach cycles
2Device complexity
If WLAN activation status is not shared with PGW, then device simplicity is maintained, but unnecessary attach/detach procedures occur
Solution Approach 1:
The notification mechanism serves multiple functions: it informs the PGW of WLAN status, prevents unnecessary attach/detach procedures, and maintains session continuity. By making this single notification action multi-functional, the system avoids time-consuming procedures without significantly increasing device complexity
Solution Approach 2:
The system introduces an intermediary notification mechanism between the electronic device and PGW that facilitates efficient status sharing. This intermediary approach allows the PGW to understand device state without requiring complex direct control mechanisms, thereby preventing unnecessary procedures while maintaining simplicity
3Reliability
If attach/detach procedures are performed frequently, then network status is updated, but signaling overhead increases
Solution Approach 1:
The electronic device performs preliminary notification of its WLAN status to the PGW before actual data transmission or network switching occurs. This preliminary action allows the network to be pre-informed of status changes, eliminating the need for frequent attach/detach procedures and reducing signaling overhead while maintaining reliable network status updates
Solution Approach 2:
The system maintains continuous useful action by establishing an ongoing notification mechanism between the device and PGW. Rather than intermittent attach/detach procedures, the system continuously shares status information, thereby reducing signaling overhead while ensuring reliable network status awareness
Data Source
AI summary
An electronic device, a gateway device, and signal transmission and reception methods thereof are provided. The electronic device includes a communication unit and a control unit. The communication unit is configured to transmit and to receive a signal to and from another communication entity. The control unit is configured to determine whether to activate a wireless local area network (WLAN), and to transmit information about activation or deactivation of the WLAN to a packet data network so as to maintain a created channel and authentication for data transmission and reception.