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

• US 8,989,382 B2
• Filed: 03/10/2014
• Issued: 03/24/2015
• Est. Priority Date: 08/10/2007
• Status: Active Grant

• Current Assignee: 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): Song, Hosuk
• Application Number:
  US14/203,287
• Publication Number:
  US 20140192631A1
• Time in Patent Office: 379 Days
• Field of Search: 713/150, 713160-163, 713167-171, 713/181, 380/270, 726 2- 3, 726 11- 14, 455/73, 455410-411
• US Class Current: 380/270
• 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. A method of performing a re-establishment procedure in a mobile communication system, the method comprising:

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.

2. The method of claim 1, wherein the re-establishment procedure comprises at least re-establishing a radio bearer (RB) or re-establishing a radio resource control (RRC) connection.

3. The method of claim 1, wherein performing the integrity check on the at least one PDCP control plane data unit comprises:

counting a number of integrity-failed PDCP control plane data units among the at least one PDCP control plane data unit received; and

comparing the number of integrity-failed PDCP control plane data units counted to a reference value,

wherein the integrity check failure is identified if the number of integrity-failed PDCP control plane data units counted reaches the reference value.

4. The method of claim 3, wherein the integrity-failed PDCP control plane data units are in a consecutive order.

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

6. The method of claim 1, further comprising:

deciphering the at least one PDCP control plane data unit received.

7. The method of claim 6, further comprising:

removing at least one PDCP header from the at least one PDCP control plane data unit received.