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5G SA Mobile Networks

Reflective QoS in 5G

A great new feature of #5G Core Networks is Reflective QoS – Where QoS of the traffic coming to a UE is reflected on the QoS coming out.

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EPC EUTRAN LTE Mobile Networks RF

Qos in LTE (4G) – ARP

ARP in LTE is not the Ethernet standard for address resolution, but rather the Allocation and Retention Policy. A scenario may arise where on a congested cell another bearer is requested to be setup. The P-GW, S-GW or eNB have to make a decision to either drop an existing bearer, or to refuse the request […]

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EPC EUTRAN LTE Mobile Networks RF

QoS in LTE (4G) – MBR/AMBR/APN-MBR

MBR stands for Maximum Bit Rate, and it defines the maximum rate traffic can flow between a UE and the network. It can be defined on several levels: MBR per Bearer This is the maximum bit rate per bearer, this rate can be exceeded but if it is exceeded it’s QoS (QCI) values for the […]

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EPC EUTRAN LTE Mobile Networks RF

QoS in LTE (4G) – QCI

The QCI (Quality Class Indicator) is a value of 0-9 to denote the service type and the maximum delays, packet loss and throughput the service requires. Different data flows have different service requirements, let’s look at some examples: A VoLTE call requires low latency and low packet loss, without low latency it’ll be impossible to […]

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EPC EUTRAN LTE Mobile Networks RF

QoS in LTE (4G) – GBR & Non-GBR Bearers

GBR is a confusing concept at the start when looking at LTE but it’s actually kind of simple when we break it down. GBR stands for Guaranteed Bit Rate, meaning the UE is guaranteed a set bit rate for the bearer. The default bearer is always a non-GBR bearer, with best effort data rates. Let’s […]