How end to end QoS in managed in LTE?

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As I know, in EPC the e2e qos is managed in HLR/HSS and PCRF. Can someone explain the process and the reference. Thx

posted May 11, 2017 by Hana Pamora

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1 Answer

In IP network there are various services which needs different treatment at network nodes and when their packets travel through different network nodes such as routers. LTE is also IP based telecom network and devices attached to it access different kinds of services.
LTE network takes IP packets from UE and network and provides the required QoS through its network using different protocols, mechanism in its network.
If I take example of downlink packet in the direction from network to UE, LTE receives plain IP packets but based on its filters against the received IP packets it decides which bearer should be used to carry this packet. This is the entry point for downlink direction.
Once packet sent over a particular bearer based on required QoS (delay budget , packet losss rate) , it is considered for corresponding scheduling at the MAC scheduler.

answer May 12, 2017 by Vikram Singh

Thanks.
But I still curious about e2e qos from the bearer prespective.
As my understanding, QoS parameter in bearer (QCI, ARP and MBR) will follow PCRF setting, but if there's no setting in PCRF then it will follow HLR/HSS setting.
Please cmiiw

commented May 12, 2017 by Hana Pamora

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