有时候我们需要知道ims为什么没有注册,是不是网络下发不支持呢?这个是可以从log中找到的,
截取关键log信息如下:
455299, 26088, 1647938, 04:59:27:083 2022/07/26, MOD_ESM, , TRACE_PEER, [NW->MS] ESM_MSG_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_REQUEST (PTI:2, EBI:5)
........
Message Content
Non-Access-Stratum (NAS)PDU
0101 .... = EPS bearer identity: EPS bearer identity value 5 (5)
.... 0010 = Protocol discriminator: EPS session management messages (0x2)
Procedure transaction identity: 2
NAS EPS session management messages: Activate default EPS bearer context request (0xc1)
EPS quality of service
Length: 1
Quality of Service Class Identifier (QCI): QCI 7 (7)
Access Point Name
Length: 24
APN: test.mnc001.mcc001.gprs
PDN address
Length: 13
0000 0... = Spare bit(s): 0x00
PDN type: IPv4v6 (3)
PDN IPv6 if id: ::0:0:0:1
PDN IPv4: 192.168.48.129
..........
QCI5是IMS消息专用通道,就是支持VOLTE的终端打开了VOLTE就一直存在QCI9+5;
QCI=7 语音、视频(直播)、互动游戏
目前log中QCI 是 7,所以网络下发的能力中不支持ims ,仪表没有配置ims能力