Method for detecting security error in mobile telecommunications system and device of mobile telecommunications

• US 9,813,427 B2
• Filed: 09/14/2015
• Issued: 11/07/2017
• Est. Priority Date: 08/10/2007
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson), LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung June, Park, Sung Jun, Lee, Young Dae, Chun, Sung Duck
• Primary Examiner(s): Lopata, Robert
• Application Number:
  US14/852,960
• Publication Number:
  US 20160006748A1
• Time in Patent Office: 785 Days
• Field of Search: 370216
• CPC Class Codes: G06F 11/1004 to protect a block of data words, e.g. CRC or checksum G06F11/1076 takes precedence; security arrangements for protecting computers or computer systems against unauthorized activity G06F21/00
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 45/28 using route fault recovery
• CPC Class Codes: H04L 49/552 by ensuring the integrity of packets received through redundant connections
• CPC Class Codes: H04L 49/555 Error detection
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 12/033 of the user plane, e.g. user's traffic
• CPC Class Codes: H04W 12/037 of the control plane, e.g. signalling traffic
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 12/106 Packet or message integrity
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure
• CPC Class Codes: H04W 76/19 Connection re-establishment

Abstract

According to one embodiment, a method of performing a re-establishment procedure in a mobile communication system includes: receiving at least one packet data convergence protocol (PDCP) control plane data unit; performing an integrity check on the at least one PDCP control plane data unit; identifying an integrity check failure with regard to the at least one PDCP control plane data unit; and performing a re-establishment procedure if the integrity check failure is identified to exist with regard to the at least one PDCP control plane data unit.

Claims

1. An apparatus in a mobile communication system, the apparatus comprising:

a receiver configured to receive at least one packet data convergence protocol (PDCP) data unit; and

a controller operatively connected to the receiver and configured to;

perform, by a PDCP entity, an integrity check on the at least one PDCP data unit,

identify, by the PDCP entity, an integrity check failure with regard to the at least one PDCP data unit; and

perform, by a radio resource control (RRC) entity, a re-establishment procedure if the integrity check failure is identified to exist with regard to the at least one PDCP data unit,

wherein the re-establishment procedure comprises at least re-establishing a radio bearer (RB), resetting a security configuration with respect to a particular RB, or re-establishing a PDCP layer.

2. The apparatus of claim 1, wherein the controller is configured to perform the integrity check by counting a number of integrity-failed PDCP data units among the at least one data unit received, comparing the number of integrity-failed PDCP data units counted to a reference value, and identifying the integrity check failure if the number of integrity-failed PDCP data units counted reaches the reference value.

3. The apparatus of claim 2, wherein the integrity-failed PDCP data units are in a consecutive order.

4. The apparatus of claim 1, wherein the integrity check failure is identified if a message authentication code-integrity (MAC-I) value of the at least one data unit received is different from an expected message authentication code-integrity (XMAC-I) value generated by the PDCP entity.

5. The apparatus of claim 1, wherein the controller is further configured to decipher the received at least one PDCP data unit.

6. The apparatus of claim 5, wherein the receiver is further configured to remove at least one PDCP header from the at least one PDCP data unit.