WLAN Point-to-Point Link for LTE Traffic Offloading
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Solution Overview
Problem
Current wireless local area network (WLAN) technologies do not effectively integrate with 3GPP cellular networks to provide supplemental bandwidth and efficient data routing, leading to limitations in bandwidth and quality of service for user equipment (UE) in cellular data communications.
Innovation Solution
Establishing a WLAN point-to-point communication link between user equipment (UE) and an evolved universal terrestrial radio access network node B (eNB) using a WLAN access point, which allows for the offloading of cellular traffic through a WLAN interface, utilizing unique identifiers and tunneling protocols to manage data packets and ensure quality of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If WLAN technology is integrated with 3GPP cellular networks to provide supplemental bandwidth, then bandwidth availability and quality of service are improved, but device complexity and network integration difficulty increase
Solution Approach 1:
The patent merges WLAN and 3GPP cellular networks into a unified communication system where the eNB serves as a common anchor point for both networks. The WLAN AP connects to the eNB via backhaul link, creating an integrated architecture that combines the spectral resources of WLAN with the cellular network infrastructure, thereby increasing bandwidth availability while managing integration complexity through standardized interfaces
Solution Approach 2:
The eNB is designed to perform multiple functions simultaneously: it acts as a cellular base station for UEs and as a gateway for WLAN traffic. The eNB handles both cellular data communications and WLAN traffic routing, providing universal functionality that reduces the need for separate dedicated infrastructure and manages system complexity
2Productivity
If traffic offloading through WLAN interface is implemented, then cellular network capacity is improved, but protocol complexity and data routing complexity increase
Solution Approach 1:
The eNB serves as an intermediary between the WLAN AP and the core cellular network. It receives traffic from UEs via WLAN interface, performs protocol adaptation and routing, and forwards to the appropriate destinations. This intermediary function simplifies the overall system by centralizing protocol handling at the eNB rather than requiring complex protocol stacks in each UE
Solution Approach 2:
The patent segments the network into distinct functional domains: the WLAN access domain handled by WLAN AP, the routing and protocol adaptation domain handled by eNB, and the core network domain. This segmentation allows each component to specialize in specific functions, reducing overall protocol complexity while maintaining high network capacity
3Speed
If point-to-point WLAN communication link is established between UE and eNB, then data routing efficiency is improved, but mobility management complexity increases
Solution Approach 1:
The system establishes point-to-point WLAN communication links between UEs and eNB in advance when conditions are favorable, preparing high-speed data paths before they are needed. The eNB pre-configures WLAN interfaces and maintains ready-state connections, enabling rapid data routing when traffic demands arise without requiring complex real-time mobility decisions
Data Source
AI summary
A wireless local area network (WLAN) point-to-point communications link between an evolved universal terrestrial radio access network node B (eNB) and a user equipment device (or simply UE) is identified by UE/eNB media access control (MAC) identifiers on a per UE or per data radio bearer (DRB) basis for offloading cellular data from a long term evolution (LTE) link to the WLAN point-to-point communications link. A wireless local area network tunneling protocol (WLTP) includes packet formats and network protocol stack arrangements to support functions facilitated by the WLAN point-to-point communications link, such as, for example, identification of control and data traffic messages, DRB identification for WLTP packets, quality of service (QoS) delay and packet loss measurement, support of bearer splitting, and support of a general framework for offloading cellular traffic at different depths of the 3rd Generation Partnership Project (3GPP) network protocol stack.