NPO Capability Management
LTE Call Flows
Date: 02.09.10
Version 1.0
Nokia Siemens Networks
LTE Call Flows
RL09/RL10
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
Version 1.0
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Copyright © Nokia Siemens Networks. This material, including documentation and any related computer
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Copying, including reproducing, storing, adapting or translating, any or all of this material requires the prior
written consent of Nokia Siemens Networks. This material also contains confidential information which may
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
Version 1.0
Table of contents
1 Scope...........................................................................................................3
2 Signalling Flows...........................................................................................4
3 References.................................................................................................11
1 Scope
The is an extract of Call Flow graphs from the NPO document LTE FDD Optimization Guidelines
by Lorena Serna and Jyri Lamminmäki.
This document is focused on NSN’s RL10 although it also covers areas outside RL10
implementation.
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
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2 Signalling Flows
Figure 1: Attach Procedure with Initial EPS bearer establishment. Green marks indicate the
beginning and the end of the attach procedure
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
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Figure 2: EPS Setup Procedure, UE and Network Initiated (Part 1)
Note: Green circles with BUE and EUE refer to UE initiated case (B: begin, E: end) and the ones
with BN and EN correspond to the network initiated case
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
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Figure 3: EPS Bearer Setup Procedure, (Part 2)
Note: T1 and T2 refers to events triggering the counters in yelow boxes
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
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Figure 4: Intra eNB HO signalling flow (no MME intervention required)
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
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Figure 5: Inter eNB HO procedure
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
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Figure 6: Paging
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
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Figure 7: E-UTRAN Tracking Area Update w/o S-GW change (ref. 3GPP TS23401-920)
Additional signalling flows can be found in Reference [1] Basic Signalling Flows (Part of LTE
Hands On Material)
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NPO Capability Management
LTE Call Flows
Date: 02.09.10
Version 1.0
3 References

[1] Basic Signalling Flows (Part of LTE Hands On Material)
https://sharenet-ims.inside.nokiasiemensnetworks.com/Overview/D419453863
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