LTE-U与WiFi在非授权频段的共存方案研究

发布时间：2018-12-07 20:11

【摘要】：无线数据业务的快速增长给有限的频谱资源带来新的挑战。在当前的各种提高频谱效率方案中,LTE-U(LTE in unlicensed spectrum,LTE-U)通信系统获得了全球运营商的广泛认可。作为5G关键技术之一,LTE-U运用载波聚合技术(carrier aggregation,CA)借助于非授权频段对数据业务进行分流,以达到提高网络数据传输速率、频谱利用率和增强用户移动性的目的。然而,由于LTE-U和WiFi系统接入技术的不同,如何解决两个系统之间的和谐共存成为LTE-U系统能否在非授权频段上使用的关键。对LTE-U的相关背景知识、工作模式、载波聚合技术、LTE-U设计要点进行介绍。指出当前LTE-U和WiFi在共存问题上面临的挑战,并对当前LTE-U和WiFi系统在非授权频段上共存的解决方案进行阐述分析和对比。对未来LTE-U和WiFi系统共存的研究方向进行了展望。
[Abstract]:The rapid growth of wireless data services brings new challenges to the limited spectrum resources. Among the current schemes to improve spectrum efficiency, LTE-U (LTE in unlicensed spectrum,LTE-U communication systems have been widely recognized by operators around the world. As one of the key technologies of 5G, LTE-U uses carrier aggregation technology (carrier aggregation,CA) to distribute the data services with the aid of non-authorized frequency bands, in order to improve the data transmission rate, spectrum efficiency and mobility of users. However, due to the difference of access technology between LTE-U and WiFi systems, how to solve the problem of harmonious coexistence between the two systems becomes the key to whether the LTE-U system can be used in the unauthorized frequency band. The background knowledge, working mode, carrier convergence technology and LTE-U design essentials of LTE-U are introduced. The challenges faced by LTE-U and WiFi in coexistence are pointed out, and the solutions of existing LTE-U and WiFi systems in unauthorized frequency band are analyzed and compared. The future research direction of coexistence of LTE-U and WiFi systems is prospected.
【作者单位】：重庆邮电大学移动通信重点实验室;
【基金】：国家自然科学基金(61401053) 863项目(2014AA01A701) 长江学者创新研究团队(IRT1299)~~
【分类号】：TN929.5;TN92

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