3GPP测量事件
| 事件 | 定义 | 38.331与36.331定义差异 | 备注 |
| A1 | Serving becomes better than threshold | 38.331与36.331定义一样 | 服务小区质量好于门限。 |
| A2 | Serving becomes worse than threshold | 38.331与36.331定义一样 | 服务小区质量差于门限 |
| A3 | Neighbour becomes offset better than SpCell | SpCell(38.331) PCell/PSCell(36.331) | SpCell即Special Cell，是PCell和PSCell的合称。邻小区质量比SpCell质量好一定offset |
| A4 | Neighbour becomes better than threshold | 38.331与36.331定义一样 | 邻小区质量好于门限 |
| A5 | SpCell becomes worse than threshold1 and neighbour becomes better than threshold2 | SpCell(38.331) PCell/PSCell(36.331) | 服务小区质量差于门限1同时邻小区质量好于门限2 |
| A6 | Neighbour becomes offset better than SCell | 38.331与36.331定义一样 | 邻小区质量比SCell质量好一定offset |
| B1 | Inter RAT neighbour becomes better than threshold | 38.331与36.331定义一样 | 异系统邻区质量好于门限 |
| B2 | PCell becomes worse than threshold1 and inter RAT neighbour becomes better than threshold2 | 38.331与36.331定义一样 | PCell质量差于门限1同时异系统小区质量好于门限2。B2的效果类似于A2+B1。 |
| L1 | Interference becomes higher than threshold | 38.331定义 | 干扰高于门限 |
| C1 | The NR sidelink channel busy ratio is above a threshold | 38.331定义 | NR Sidelink的信道繁忙率高于门限 |
| CSI-RS resource becomes better than threshold | 36.331定义 | CSI-RS质量好于门限 | |
| C2 | The NR sidelink channel busy ratio is below a threshold | 38.331定义 | NR Sidelink的信道繁忙率低于门限 |
| CSI-RS resource becomes offset better than reference CSI-RS resource | 36.331定义 | CSI-RS质量比 | |
| X1 | Serving L2 U2N Relay UE becomes worse than threshold1 and NR Cell becomes better than threshold2 | 38.331定义 | Relay相关测量 |
| X2 | Serving L2 U2N Relay UE becomes worse than threshold | 38.331定义 | Relay相关测量 |
| Y1 | PCell becomes worse than threshold1 and candidate L2 U2N Relay UE becomes better than threshold2 | 38.331定义 | Relay相关测量 |
| Y2 | Candidate L2 U2N Relay UE becomes better than threshold | 38.331定义 | Relay相关测量 |
| W1 | WLAN becomes better than a threshold | 36.331定义 | WLAN测量 |
| W2 | All WLAN inside WLAN mobility set becomes worse than threshold1 and a WLAN outside WLAN mobility set becomes better than threshold2 | 36.331定义 | WLAN测量 |
| W3 | All WLAN inside WLAN mobility set becomes worse than a threshold | 36.331定义 | WLAN测量 |
| V1 | The channel busy ratio is above a threshold | 36.331定义 | 信道忙碌率测量 |
| V2 | The channel busy ratio is below a threshold | 36.331定义 | 信道忙碌率测量 |
| H1 | The Aerial UE height is above a threshold | 36.331定义 | 空中UE高度测量 |
| H2 | The Aerial UE height is below a threshold | 36.331定义 | 空中UE高度测量 |
参考：
- 3GPP TS 38.331V1702
- 3GPP TS 36.331V1702