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Method and devices for protection of control plane functionality

  • US 10,219,158 B2
  • Filed: 02/21/2014
  • Issued: 02/26/2019
  • Est. Priority Date: 02/21/2014
  • Status: Active Grant
First Claim
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1. A method for protection of control plane functionality of a network node of a communications network providing wireless communication to a mobile terminal, the network node being configured to support control plane signaling with the mobile terminal, the method comprising:

  • maintaining a communication context for the mobile terminal, the communication context being associated with a control plane signaling message exchange between the mobile terminal and the network node,establishing, for a received control plane signaling message, a communication context which is associated with the mobile terminal,decrypting and integrity-checking the received control plane signaling message,responsive to the decrypting and integrity-checking the received control signaling message, determining the decrypted and integrity-checked control plane signaling message one of conforms to a protection rule or violates the protection rule of a protection policy based on information in the established communication context,in response to determining the decrypted and integrity-checked control plane signaling message conforms to the protection rule, accepting and/or forwarding the message in the communication network, andin response to determining the decrypted and integrity-checked control plane signaling message violates the protection rule, modifying content of the received control plane signaling message according to a specified rule of the protection policy to maintain a correct state of the control plane signaling message exchange between the mobile terminal and the network node.

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