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Why we need QoS in LTE

+2 votes
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Sorry for silly question but still want to know it can someone help?

posted Apr 16, 2014 by anonymous

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Everyone has their own need/requirement for usage. Not everyone pays for high speed. Based on subscription Operator can give the services. If user is paying more it will get good QoS plus promised data rates. Network has to know how to differentiate these things. For this purpose we have different QoS.

2 Answers

+1 vote

There are premium subscribers who always want to have better user experience on their 4G LTE device. These users are willing to pay more for high bandwidth and better network access on their devices. Not only the subscribers but some services itself need better priority handling in the network (e.g. VoIP call). To be able to full fill this, QOS plays the key role. QOS defines priorities for certain customers / services during the time of high congestion in the network

answer Apr 21, 2014 by Divya Bharti
0 votes

An end user uses different types of services like web browsing, ftp, voice call etc.
Every service may have different types of delay tolerance and packet loss.
Due to these characteristics, LTe defined a set of QoS bearers.

There are 9 QCI values defined for LTe.
Every application, whichever is being used by an LTE subscriber need to map to one of the defined QCIs.

Due to this, operator may impose different-2 charging rules and can generate more revenue.

answer Apr 16, 2014 by Vimal Kumar Mishra
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0 votes

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

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I would like to measure QoS parameters in LTE network using NS3 simulator, but I am beginner with NS3 please help?

+1 vote

For practical network installations, an eNodeB would be connected to SGW via some IP router. Similarly there can be IP router connection between SGW and PGW.

How is End-to-End QoS maintained between these routers?

Because as I see in specs, the QCI value is transmitted in GTP-C signalling messages between S5/S8, S11 interface: based on that QCI & other QoS parameters, the bearers are defined & GTP-U tunnels are made.

But, for in-between routers, how is QoS guaranteed?

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