爱总,根据我观察,第6步GTP头里面的那个TEID 0x54000360 ,其实是第3步里面Old SGSN返回给New SGSN的PDP上下文里面的Up Link TEID Control Plane。也就是说,区间路由更新过程当中,New SGSN更新PDP上下文的时候必须用NSAPI和原PDP上下文的控制面TEID来标示GGSN里面的一个上下文是不?
The old SGSN duplicates the buffered N PDUs and starts tunnelling them to the new SGSN. Additional N PDUs received from the GGSN before the timer described in step 2 expires are also duplicated and tunnelled to the new SGSN. N PDUs that were already sent to the MS in acknowledged mode and that are not yet acknowledged by the MS are tunnelled together with the SNDCP N PDU number. No N PDUs shall be forwarded to the new SGSN after expiry of the timer described in step 2
原SGSN复制已经缓冲了的N PDU,并且开始想新SGSN传输它们。随后被GGSN接受到的N PDUS 在第二步所描述的定时器超时之前也会同样被复制并且传输给新的SGSN。那些已经通过确认模式发送给MS的和那些没有通过MS确认的 N PDU将会和SNDCP N PDU
number一起被传输。任何N PDUS都不会在第二步描述的定时器超时之后被传送。
"N PDUs that were already sent to the MS in acknowledged mode and that are not yet acknowledged by the MS are tunnelled together with the SNDCP N PDU number."
那些已经通过确认模式发送给MS的和那些没有通过MS确认的 N PDU将会和SNDCP N PDU
number一起被传输。 这一句还不是很里了解。