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LTE EPC upgrade

Manuel Requena requested to merge (removed):epc-upgrade into master

Code review requested. This code will be merged in January; it is believed to be ready to merge.

The LTE/EPC model has been enhanced with the new features. These new features allow the simulation user to test more realistic simulations related to the core network. These features are:

  • SGW, PGW and MME are full nodes.
  • There are P2P links between core network nodes.
  • New S5 interface between SGW and PGW nodes based on GTPv2-C protocol.
  • Allow simulations with multiple SGWs and PGWs.

LTE eNB RRC is extended to support:

  • S1 signalling with the core network is initiated after the RRC connection establishment procedure is finished.
  • New ATTACH_REQUEST state to wait for finalization of the S1 signalling with the core network.
  • New InitialContextSetupRequest primitive of the S1 SAP that is received by the eNB RRC when the S1 signalling from the core network is finished.
Edited by Tom Henderson

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