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revised helpers.seqdiag

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This commit is contained in:
Nicola Baldo
2011-10-19 19:02:58 +02:00
parent 64d2c44413
commit 49491e956a
2 changed files with 25 additions and 13 deletions
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26
src/lte/doc/source/helpers.seqdiag
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@@ -5,21 +5,23 @@ diagram {
LenaHelper => EpcHelper [label="AddEnb"] {
EpcHelper -> EpcHelper [label="create EpcEnbApplication"];
EpcHelper -> EpcHelper [label="Setup S1 link"];
EpcHelper => EpcSgwPgwApplication [label="AddEnb (enbIpv4Address)"];
}
LenaHelper => EpcHelper [label="ActivateEpsBearer"] {
EpcHelper => EpcSgwPgwApplication [label="CreateSessionRequestOrBearerResourceCommand", return="TEID"] {
EpcSgwPgwApplication => EpcSgwPgwApplication [label="Setup S1 Bearer"];
}
EpcHelper => EpcEnbApplication [label="ErabSetupRequest(TEID)"] {
EpcEnbApplication => EpcEnbApplication [label="Setup S1 Bearer"];
EpcEnbApplication => LteEnbNetDevice [label="SetupRadioBearer", return="RBID"] {
LteEnbNetDevice -> LteEnbNetDevice [label="Setup Radio Bearer"]
}
EpcEnbApplication -> EpcEnbApplication [label="store TEID<->RBID mapping"]
}
LenaHelper => LteUeRrc [label="GetRnti", return="RNTI"]
LenaHelper => LteEnbRrc [label="SetupRadioBearer", return="LCID"]
LenaHelper => EpcHelper [label="ActivateEpsBearer(UE IP, eNB IP, TFT, RNTI, LCID)"] {
EpcHelper => EpcSgwPgwApplication [label="ActivateS1Bearer (UE IP, eNB IP, TFT)", return="TEID"] {
EpcSgwPgwApplication => EpcSgwPgwApplication [label="Store UE IP<->eNB IP mapping"];
EpcSgwPgwApplication => EpcSgwPgwApplication [label="Create GTP-U tunnel endpoint"];
}
EpcHelper => EpcEnbApplication [label="ErabSetupRequest(TEID, RNTI, LCID )"] {
EpcEnbApplication -> EpcEnbApplication [label="Create GTP-U tunnel endpoint (TEID)"];
EpcEnbApplication -> EpcEnbApplication [label="store TEID<->(RNTI,LCID) mapping"]
}
}
}

12
src/lte/doc/source/lte-design.rst
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@@ -399,10 +399,20 @@ For the uplink:
Helpers
+++++++
Note: the role of the MME is taken by the EpcHelper, since we don't have an MME at the moment (the current code supports data plane only).
.. seqdiag:: helpers.seqdiag
A few notes on the above diagram:
* the role of the MME is taken by the EpcHelper, since we don't have
an MME at the moment (the current code supports data plane only);
* in a real LTE/EPC system, the setup of the RadioBearer comes after
the setup of the S1 bearer, but here due to the use of Helpers
instead of S1-AP messages we do it the other way around
(RadioBearers first, then S1 bearer) because of easier
implementation. This is fine to do since the current code focuses
on control plane only.