参考文献

[1] AAZHANG B，AHOKANGAS P，ALVES H，et al. Key drivers and research challenges for 6G ubiquitous wireless intelligence（white paper）[R]. University of Oulu，2019.

[2] DAVID K，BERNDT H. 6G vision and requirements: is there any need for beyond 5G? [J]. IEEE Vehicular Technology Magazine，2018，13（3）: 72-80.

[3] SAAD W，BENNIS M，CHEN M Z. A vision of 6G wireless systems: applications，trends，technologies，and open research problems[J]. IEEE Network，2020，34（3）: 134-142.

[4] BI Q. Ten trends in the cellular industry and an outlook on 6G[J]. IEEE Communications Magazine，2019，57（12）: 31-36.

[5] ZHANG Z Q，XIAO Y，MA Z，et al. 6G wireless networks: vision，requirements，architecture，and key technologies[J]. IEEE Vehicular Technology Magazine，2019，14（3）: 28-41.

[6] ITU. IMT vision—framework and overall objectives of the future development of IMT for 2020 and beyond: ITU-R M.2083-0[S]. 2015.

[7] 张平，牛凯，田辉，等. 6G移动通信技术展望[J].通信学报，2019，40（1）: 141-148.

[8] 尤瓦尔·赫拉利.未来简史[M].林俊宏，译.北京：中信出版社，2017.

[9] NEAL S. Snow crash[M]. New York: Bantam Books，1992. i45XBbHwmVk3EuhVssi5P5A9bJ+AMWoaiS4y0HuFZCewPsDhfI8scuRPGRg7hz2m