Cellular-WLAN Interworking via Network Controller Mediation
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Solution Overview
Problem
Current cellular-WLAN interworking technologies face challenges in efficiently managing traffic offloading between cellular and WLAN networks, leading to suboptimal quality of service, coverage, and battery life in user devices.
Innovation Solution
The implementation of a network environment that facilitates seamless handovers between cellular and WLAN access points, utilizing protocols like IEEE 802.11r and 802.11k, and IP Security (IPSec) tunneling for data transfer, allowing for efficient traffic differentiation and quality of service management across both access methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traffic offloading between cellular and WLAN networks is implemented, then quality of service and battery power consumption are improved, but device complexity and handover management difficulty increase
Solution Approach 1:
The patent introduces a network controller as an intermediary component that centralizes the management of traffic offloading decisions and handover processes. The network controller receives traffic information from the communication device, determines optimal offloading strategies, and coordinates handover between cellular and WLAN networks, thereby reducing the complexity burden on the user device while maintaining service quality.
Solution Approach 2:
The system segments the traffic management functionality by separating control plane operations (handled by the network controller) from user plane operations (handled by the communication device). This segmentation allows complex handover management logic to be isolated in the network controller, simplifying the device architecture while preserving QoS through centralized coordination.
2Area of stationary object
If seamless handovers between cellular and WLAN access points are implemented, then coverage is extended, but device complexity and protocol management difficulty increase
Solution Approach 1:
The network controller serves as a mediator that manages the complex protocol interactions required for seamless handovers between cellular and WLAN access points. It coordinates the handover process, manages protocol state transitions, and ensures smooth connectivity, thereby extending coverage without proportionally increasing device complexity.
3Reliability
If traffic differentiation and quality of service management are implemented across both access methods, then quality of service is improved, but device complexity increases
Solution Approach 1:
The network controller acts as an intermediary that centralizes traffic differentiation and QoS management functions. It receives traffic information from the communication device, determines appropriate QoS parameters, and enforces traffic policies across both cellular and WLAN access methods, thereby improving service quality while minimizing the QoS management burden on the device.
Data Source
AI summary
A device for facilitating cellular-wireless local area network (WLAN) interworking may include at least one processor circuit. The processor circuit may be configured to receive a packet including a first tunnel identifier and addressed to a user equipment (UE). The processor circuit may be configured to identify a radio bearer associated with the first tunnel identifier, where the radio bearer is configured to facilitate transmission of the packet to the UE via cellular communications. The processor circuit may be configured to determine whether the radio bearer has been offloaded over a WLAN. The processor circuit may be configured to, when the radio bearer has been offloaded over the WLAN, identify a second tunnel identifier mapped to the radio bearer; encapsulate the packet based on the second tunnel identifier, where the encapsulated packet includes the second tunnel identifier; and transmit the encapsulated packet to the UE over the WLAN.