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LTE: Why does need a bearer of QCI 5 to exchange SIP signalling messages ?

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LTE: Why does need a bearer of QCI 5 to exchange SIP signalling messages ?
posted Dec 4, 2015 by Ganesh Kumar

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1 Answer

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A LTE subscriber may use different types of applications. Each application has different packet delay budget and packet loss error rate requirements. Usually network establishes non-GBR bearer (Packet Delay - 300 ms and (1/1000000) packet error loss rate) for the internet access bearer by an UE.

For IMS signalling and IMS voice data different packet delay budgets (100 ms) and packet error loss rate 1/1000000) are defined . If you see IMS packet delay budget is different from the normal internet bearer that is the reason to establish a new bearer which fulfill the requirement of IMS signaling. Along with IMS signalling bearer, another bearer with QCI "1" need to establish .

answer Dec 5, 2015 by Harshita
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