高通分析的中间结论如下:
In MO log, the call is disconnected bynetwork with No user responding.
In MT log, the UE is in LTE, whichshould be the MT CSFB call, so our LTE team will take a look at it from LTEPOV.
02-06.10-29_mo_not_reachable
02:24:07.862,cnmlog.c,784,H,ds1=MNCNM=CNM msg info:PD_CC, msg_type=SETUP, 02:24:08.331,cnmlog.c,764,H,ds1=MNCNM= CNMmsg info:PD_CC, msg_type=CALL_PROCEEDING,02:24:23.640,cnmlog.c,780,H,ds1=MNCNM= CNM msg info:PD_CC, msg_type=PROGRESS,
2015 Feb 6 02:25:04.217 [74] 0x7B3A UMTS DSDS NAS SignalingMessages -- DISCONNECT Subscription ID = 0
MessageDirection = To UE
NASOTA Message Contents:
chan_type = 0 (0x0)
prot_disc_check = 3 (0x3)
trans_id_or_skip_ind = 8 (0x8)
prot_disc = 3 (0x3) (GSM_CALL_CONTROL)
msg_type = 37 (0x25)
prot
call_ctrl_prot
DISCONNECT
cause
ext = 1 (0x1)
coding_standard = 3 (0x3)
loc = 0 (0x0)
cause_val = 18 (0x12) (No user responding)
我验证这些分析：用“PD_CC, msg_type”搜索，可以搜到不少，但是DISCONNECT相关的消息，发现有些找不到，对“Log View Config ...”和“Message View Config ...”减少过滤，还是没有发现：“0x7B3A UMTS DSDS NAS”。不过用QCAT可以看到这些，我的是6.30版的，同事说是最新下载的，但提示“Could not find packet definition”。
QXDM中有一个OTA log，
OTA LOG [0x7B3A/003/037]CC/Disconnect 02:25:04.217 Subscription ID: 0, Direction: Network To MS, Length: 7
接下来的内容和上面的一致。
回头重启下，看看QCAT能否显示packet definition。
反正处理通信的问题，注意用OTA LOG过滤下。