5G波束调整优先策略的网络侧干预方案研究

5G随机接入中,第一次波束失败后UE终端可以选择再次发起随机接入。再次随机接入时可以选择更换新的波束进行接入,也可以选择对原波束进行功率攀升调整后随机接入。但是优先采用哪一种策略,5G标准协议并没有进行规定,所以其优先策略完全由UE自主决定,网络侧无法参与。不同的场景下因地制宜地采用不同的策略其效果是完全不同的,因此再次随机接入的优先策略必须依场景的不同而不同。本文正是基于该目的,通过对随机接入过程和原理的分析,结合空口信息的内容,提出网络侧利用MIB消息中的闲置的比特对UE的随机接入波束调整策略进行事先干预,指示UE终端调整波束调整优先策略,从而使得UE终端能更快更好地接入网络,同时提高随机接入成功率。

The study about how network affect thepriority policy about beam adjustment of NR

In the random access process of NR,after the first random access process fails, the UE terminals will start the second random access process again.The ue can select a new beam to finish the random access process,or it can also select the old beam that add some power to finish the random access process.There is no mandatory requirement about which policy to select,so the ue terminals can finish the function independly without the network participation.Taking different strategies according to different scenarios is quite necessary.This paper analyzes the principle of random access process and puts forward a method that can realize the target of priority selection of mobile phone terminal for network interference. So that through another random access,the ue can successful access to the network in time and improve the random access success rate.