卡特切换算法里面Cause是什么意思？是代表优先级？

cause 2 、3 、4、 5是不是按照优先级来的。如cause 2优先级高于cause 3

楼上的回答基本正确，但结论有点片面，通过分析切换Cause可以判断切换类型，从而得到切换优先级。各切换触发的优先级如下，至上而下优先从高到低
1     Emergency HO     - Consecutive bad SACCH frames Cause = 7
2     Emergency HO      - Level uplink microcell - high threshold Cause = 17
3     Emergency HO      - Level downlink microcell - high threshold Cause = 18
4     Emergency HO     - Too low quality Uplink Cause = 2
5     Emergency HO     - Too low quality Downlink Cause = 4
6     Emergency HO     - Too low level Uplink Cause = 3
7     Emergency HO     - Too low level Downlink Cause = 5
8     Emergency HO     - Too long MS-BS distance Cause = 6
9     Emergency HO     - Too short MS-BS distance Cause = 22
10   Emergency HO     - Inner zone too low level Uplink Cause = 10
11   Emergency HO     - Inner zone too low level Downlink Cause = 11
13    Emergency HO     - Too high interference intracell Uplink Cause = 15
14    Emergency HO     - Too high interference intracell Downlink Cause = 16
15   Better conditions HO - high level in neighbour cell in the preferred band Cause = 21
15    Better conditions HO - high level in neighbour lower layer cell for slow MS Cause = 14
15    Better conditions HO - General capture handover Cause = 24
15    Better conditions HO - Power budget Cause = 12
15    Better conditions HO - Traffic handover Cause = 23
16   Better conditions HO - Outer zone level Uplink & Downlink Cause = 13
18   Better conditions HO - Forced Directed Retry Cause = 20
19   Better conditions HO - Fast traffic handover Cause = 28

Cause 是一个或几个counter 的通过某种算法的集合体。通俗的讲究 cause是卡特无线资源管理中对某一类 “事件”的编号，他与优先级无关。