智能增强的免授权多址接入技术

AI-Enhanced Grant-Free Multiple Access Technologies

免授权多址接入技术是未来海量物联(IoT)场景的关键使能技术。在免授权接入系统中,由于用户和基站间缺少授权信息,易产生用户难识别以及用户间强干扰等问题,一方面可将免授权多址技术与非正交多址接入技术结合来缓解随机接入造成的用户干扰问题,另一方面也可以进一步利用人工智能技术强大的数据特征提取能力,对收发机算法进行优化,以有效降低用户碰撞概率,实现海量物联场景下的大规模通信。分析了当前未来移动通信网络中多址接入技术的需求、发展历程及研究现状。指出未来需要针对全场景进行接入技术拓展和智能技术弹性演进研究,以助力智能内生多址技术发展。

The grant-free multiple access technology is regarded as a key enabling technology for future massive Internet of Things(IoT)sce-nario.In the grant-free access system,the lack of scheduling information between the user and the base station brings the problems such as difficulty to identify the active user set and strong interference between users.Hence,the combination of the grant-free multiple access technology and the non-orthogonal multiple access technology can enhance the user interference elimination capability,and furthermore,the powerful data feature extraction capability of artificial intelligence technology can be utilized to optimize the transceiver algorithms of the authorization-free multiple access system,which can effectively reduce the collision probability of the user and enhance the capability of user identification and collision data recovery.The demand,the development,and the state of art of the multiple access technology in the fu-ture wireless communication network are summarized.It is pointed out that in the future,it is necessary to expand access technology for all scenarios and conduct research on the elastic evolution of intelligent technology,in order to support the development of intelligent endog-enous multiple access technology.