LTE X2 Handover Messaging - EventHelix.com
LTE X2 Handover Messaging - EventHelix.com
LTE X2 Handover Messaging - EventHelix.com
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<strong>X2</strong>AP <strong>Handover</strong> Request Acknowledge<br />
(Successful Out<strong>com</strong>e)<br />
Target eNodeB <br />
Source eNodeB<br />
<strong>X2</strong>AP <strong>Handover</strong> Request<br />
Acknowledge<br />
<strong>EventHelix</strong>.<strong>com</strong><br />
• design with sequence diagrams<br />
• tele<strong>com</strong> systems engineering<br />
• object oriented design<br />
• The target eNodeB receives<br />
performs admission control on<br />
receipt of the <strong>Handover</strong> Request.<br />
• The target eNodeB responds with<br />
<strong>X2</strong>AP <strong>Handover</strong> Request<br />
Acknowledge.<br />
• Information about the accepted<br />
RABs is included in the message.<br />
• The Uplink and Downlink GTP<br />
Tunnel information is included<br />
for each RAB.<br />
• The tunnel assignments are<br />
made at the target to transport<br />
traffic during the handover.<br />
• A <strong>Handover</strong> Command message<br />
sent via a transparent container.<br />
Old eNB UE <strong>X2</strong>AP Id<br />
New eNB UE <strong>X2</strong>AP Id<br />
eRABs Admitted List<br />
Transparent Container<br />
eRAB Admitted Item 0<br />
…<br />
eRAB Admitted Item N-<br />
1<br />
Target to Source eNB<br />
Payload<br />
eRAB Id<br />
UL GTP Tunnel<br />
Endpoint<br />
DL GTP Tunnel<br />
Endpoint<br />
Transport Layer<br />
Address<br />
GTP TEID<br />
Transport Layer<br />
Address<br />
GTP TEID<br />
• The source eNodeB send this<br />
message to the UE.<br />
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