LTE QCI

QCI的作用，比如打电话，打电话有一个过程，首先会建立信道，中间在建立一个EPS bearer，在EPS中会携带者一个qci。可以直接看QCI描述。

可以直接查看百度百科：QCI百度百科

QCI表示Qos类别指示。这是一种特定标识，其定义了LTE数据报通信的质量。

QCIL类别范围 1~9（每个类别的定义如下表所示）

QCI	Resource Type	Priority	Packet Delay Budget(NOTE 1)	Packet Error Loss Rate(NOTE 2)	Example Services
1	GBR	2	100 ms	$10^{-2}$	Conversational Voice
2		4	150 ms	$10^{-3}$	Conversational Video（Live streaming）
3		3	50 ms	$10^{-3}$	Real Time Gaming
4		5	300 ms	$10^{-5}$	Non-conversational voice(buffered streaming)
5	Non-GBR	1	100 ms	$10^{-5}$	IMS signaling
6		6	300ms	$10^{-5}$	Video (buffered streaming), TCP-based (e.g. www, email, chat, ftp, p2p file sharing, progressive video,etc)
7		7	100 ms	$10^{-3}$	Voice, Video (live streaming), interactive gaming
8		8	300 ms	$10^{-5}$	Video (buffered streaming), TCP-based (e.g. www, email, chat, ftp, p2p file sharing, progressive video,etc)
9		9	300 ms	$10^{-5}$	Video (buffered streaming), TCP-based (e.g. www, email, chat, ftp, p2p file sharing, progressive video,etc)

QCI9 : 是LTE默认承载，任何4G终端驻留4G的时候QCI9常驻；

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；

QCI1 : 是VOLTE语音通道，通话的时候就建立，VOLTE终端通话的时候就是QCI9+5+1；

QCI2 : 是VOLTE视频通话通道，视频通话的时候建立，VOLTE终端视频通话的时候就是QCI9+5+1+2；

注意：

通过 “Activate default EPS bearer context request” 消息来给每一个UE 分配特定的QCI值并通知到UE
信令如：

Activate default EPS bearer context request ::= DIVISION
.    ...
    EPS quality of service
        Length: 1
        Quality of Service Class Identifier (QCI): QCI 9 (9)     //QCI
 
Activate dedicated EPS bearer context request ::= DIVISION
.    ...
    EPS quality of service
        Length: 5
        Quality of Service Class Identifier (QCI): QCI 1 (1)
        Maximum bit rate for uplink : 1 kbps
        Maximum bit rate for downlink : 1 kbps
        Guaranteed bit rate for uplink : 1 kbps
        Guaranteed bit rate for downlink : 1 kbps

QCI描述

GBR
QCI=1	Example Services: Conversational voicemscbsc
QCI=2	Conversational Video (Live streaming)
QCI=3	Real Time Gaming
QCI=4	Non-conversational voice (buffered streaming)
Non-GBR
QCI=5	IMS signaling
QCI=6	Video (buffered streaming), TCP-based (e.g. www, email, chat, ftp, p2p file sharing, progressive video,etc)
QCI=7	Voice, Video (live streaming), interactive gaming
QCI=8	Video (buffered streaming), TCP-based (e.g. www, email, chat, ftp, p2p file sharing, progressive video,etc)
QCI=9	Video (buffered streaming), TCP-based (e.g. www, email, chat, ftp, p2p file sharing, progressive video,etc)
QCI9是LTE默认承载，任何4G终端驻留4G的时候QCI9常驻； 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； QCI1是VOLTE语音通道，通话的时候就建立，VOLTE终端通话的时候就是QCI9+5+1； QCI2是VOLTE视频通话通道，视频通话的时候建立，VOLTE终端视频通话的时候就是QCI9+5+1+2；