查了下规范,TS24008里关于CC31说的非常的含糊。如下:
“Cause value = 31 Activation rejected, unspecified
This cause code is used by the network or by the MS to indicate that the requested service was rejected due to unspecified reasons.”
因此,实际上这给厂家留下了发挥的空间。各个厂家的实现可能有所不一样。
查了下华为的文档,是这么说CC31的,90%以上的原因是因为GTPU超时未回响应,或响应的原因值不为成功。观察UGTP和UGFU单板状态是否正常。
另外,规范里还举了个例子If the network receives an ACTIVATE PDP CONTEXT REQUEST message with request type "emergency" and there already is a PDN connection for emergency bearer services existing, the network shall reject the request with cause code #31 "activation rejected, unspecified". 作者: yiweialive 时间: 2011-10-15 10:37:31