An Overview of Key Technologies for Intelligent Access Toward 6G Full-domain Convergence
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摘要: 针对空天地一体化接入网络，该文在总结相关研究的基础上，阐述了未来空天地一体化接入架构的关键技术，分析了空口技术、多址技术、干扰分析、计算技术和人工智能(AI)技术等几个重点方向的研究进展，提出了多种接入形式并存的灵活性网络架构。针对6G全域融合网络接入的重点研究问题，结合用户的服务质量需求，构建了一体化AI赋能架构，提出了大规模混合多址接入及弹性资源适配策略。基于网络架构立体化、网络协同传输、一体化网络资源管理、未来空天地接入技术以及网络协同计算等未来重点研究方向进行了讨论和展望。
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关键词:
- 6G /
- 网络架构 /
- 接入技术 /
- 空天地一体化接入网络 /
- 空口技术
Abstract: Considering the integrated air-to-ground access network, based on summarizing the relevant research, the key technologies of future air-to-ground integrated access architecture are elaborated, and the research progress in several key directions, such as air-port technology, multiple-access technology, interference analysis, computation technology, and Artificial Intelligence (AI) technology are analyzed, and a flexible network architecture with the coexistence of multiple access forms is proposed. Considering the key research problems of the access architecture in the current air-to-ground integrated network, an integrated AI-enabled architecture is constructed by combining the user’s quality of service demand, and the large-scale hybrid multiple access and flexible resource adaptation strategy is proposed. Based on the future key research directions of network architecture stereoscopic, network cooperative transmission, integrated network resource management, future air-to-ground access technology, and network cooperative computation are discussed and outlooked. -
表 1 空口可变参数集的主要参数
主要参数 参考范围 备注 信道带宽 180 kHz～1 GHz 适应物联网、带宽传输等多类型业务需求 调制波形 循环前缀-正交频分复用(Cyclic Prefix-Orthogonal Frequency Division Multiplexing, CP-OFDM) 单载波波形/OFDM 编码方式 Polar码、卷积码等 可支持其他类型编码 子载波间隔 15 kHz, 60 kHz等 提供多种子载波间隔 多址接入方式 正交频分多址接入(Orthogonal Frequency Division Multiple Access, OFDMA)，图样分割非正交多址接入(Pattern Division Multiple Access, PDMA)等 根据不同场景选取不同多址接入方式 多波束协同传输 支持多场景波束联合传输 发挥多波束联合分集增益，提高系统容量 随机接入方式 随遇、极简接入 根据业务需求、网络状态选择接入 切换方式 极智切换 支持基于位置、终端需求的切换方式 
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