RCLWI (RAN Controlled LTE WLAN Interworking) is a technology that enables seamless integration and interworking between Long-Term Evolution (LTE) networks and Wireless Local Area Networks (WLANs). Here are the key points:
- Background:
- As mobile data traffic increases, operators seek ways to offload traffic from LTE networks to WLANs, especially indoors and in dense signal environments.
- 3GPP has been working on integrating WLAN into the mobile network architecture since Release 8.
- Integration Options:
- LTE-WLAN Aggregation (LWA): Uses dual connectivity, allowing simultaneous access via both LTE and WLAN. The WLAN function can be fully eNB integrated or separated using a new Xw interface.
- LTE-WLAN Radio Level Integration with IPsec Tunnel (LWIP): User and control plane are handled by the eNB, with UP bearers routed through a CN with WiFi legacy link.
- RCLWI Specifics:
- Control Plane: The eNB controls WLAN access.
- User Plane: UP bearers are separated from LTE eNB and routed through a CN.
- Mobile Device Requirements: Specific functionalities for network discovery, selection, handover, etc., are needed on the mobile device.
- Testing and Solutions:
- Testing requires setups that allow simultaneous WLAN and LTE access, including ePDG or IMS for VoWLAN services.
- Rohde & Schwarz offers comprehensive test solutions for LTE-WLAN integration.
RCLWI facilitates efficient traffic offloading between LTE and WLAN, enhancing user experience and network capacity indoors and in crowded areas.
