Page 342 - 5G Basics - Core Network Aspects

1 Core network aspects

Appendix I

QoS mapping among different access networks
(This appendix does not form an integral part of this Recommendation.)

In order to minimize service degradation among multi-connections, the QoS classes need to be mapped with
the same or similar classes. According to the QoS policies specified in each standard (i.e., [b-IEEE 802.16], [b-
IEEE 802.11], GPRS, UMTS, and LTE), traffic is required to be allocated both for the service flows and the
queues. The bandwidth is required to be constrained by the mapping policy of QoS management. Table I.1
shows the example of QoS mapping.

After the mapping, scheduling policy is required to be performed, such as strict priority (SP), weighted round
robin (WRR) or weighted fair queue (WFQ). Congestion control policy is also required to be performed, such
as tail-drop, random early detection (RED). Buffer size is also required to be taken into consideration.

Table I.1 – Example of QoS Mapping among different access networks

[b-IEEE b-IEEE
Priority GSM/GPRS UMTS/LTE Services
802.16] 802.11]
0 BE AC_BK Delay class 4 Background (QCI = 9) E-mail
1 BE AC_BK Delay class 1-3 Interactive (QCI = 8) Web
2 nrtPS AC_BE Delay class 1-3 Interactive (QCI = 7) FTP
(low quality)
3 nrtPS AC_BE Delay class 1-3 Interactive (QCI = 5, 6) FTP
(high quality)
4 rtPS AC_VI Delay class 1 Streaming (QCI = 4) VoD
5 ertPS AC_VI Delay class 1 Streaming (QCI = 4) Real-time
streaming

6 UGS AC_VO Delay class 1 Conversational (QCI = 2, 3) VoIP
(low quality)
7 UGS AC_VO Delay class 1 Conversational (QCI = 1) VoIP
(high quality)

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