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A:5G中,AMF可以请求gNB提供UE是否在感兴趣区域的信息。
问题是gNB如何判断UE是否在感兴趣区域(Area of Interest)呢?
答案在TS23.502的附录D.2:Determination of UE presence in Area of Interest by NG-RAN,也就是由
RAN来决定UE是否存在于感兴趣区域。
gNB侧的判断标准如下:
判断UE进入感兴趣区域(In):
- RRC连接态的UE进入了感兴趣区域;或者
- UE进入了一个包含在感兴趣区域的RNA(无线通知区域)。
判断UE离开感兴趣区域(Out):
- RRC连接态的UE离开了感兴趣区域;或者
- UE进入了一个不包含在感兴趣区域的RNA(无线通知区域)。
上述条件都不满足的其他状态判断为Unknown。
原文是:
If the AMF has requested for the Area of Interest, NG-RAN determines the UE presence of Area Of
Interest as follows:
- IN:
- if the UE is inside the Area Of Interest and the UE is in RRC Connected state; or
- if the UE is inside an RNA which is contained within the Area Of Interest.
- OUT:
- if the UE is outside the Area Of Interest in RRC Connected state; or
- if UE is inside an RNA which does not contain any part of Area Of Interest.
- UNKNOWN:
- if none of above conditions for IN or OUT is met.