Abstract: LWA（LTE WLAN Aggregation） is a promising technology to diversify the traffic of WLAN for reducing the burden of LTE networks and improving the overall system capacity. After introducing the LWA, and the LWA convergence scenario and the integration architecture, this paper describes the existing offloading architecture, and the technical problems and key technologies of LWA system. In addition, the most important access point control technology and resource allocation technology are analyzed. Finally, further research on the LWA system is given in the paper.

Key words: Long Term Evolution（LTE）, Wireless Local Area Networks（WLAN）, LTE WLAN Aggregation（LWA）, network aggregation, traffic offload

摘要： LWA（LTE WLAN Aggregation）是为了减轻LTE（Long Term Evolution）网络负担和提高系统容量而提出来的融合无线局域网（Wireless Local Area Networks，WLAN）网络对业务进行分流的一项重要技术。首先对LWA进行了概述，随后分析LWA部署场景以及融合架构，同时总结现有的分流架构，然后对LWA系统中的技术难题和关键技术进行了阐述，并分析其中最为核心的接入点控制技术和资源分配技术，最后对LWA系统下一步研究方向进行了展望。

关键词: LTE, 无线局域网（WLAN）, LWA, 融合, 业务分流